WO1999050341A1 - Smc basse pression pour la production d'elements renforces aux fibres - Google Patents
Smc basse pression pour la production d'elements renforces aux fibres Download PDFInfo
- Publication number
- WO1999050341A1 WO1999050341A1 PCT/EP1999/002473 EP9902473W WO9950341A1 WO 1999050341 A1 WO1999050341 A1 WO 1999050341A1 EP 9902473 W EP9902473 W EP 9902473W WO 9950341 A1 WO9950341 A1 WO 9950341A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- smc
- molding compound
- sheet molding
- additives
- Prior art date
Links
- 239000003677 Sheet moulding compound Substances 0.000 title claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 239000000654 additive Substances 0.000 claims description 22
- 239000004848 polyfunctional curative Substances 0.000 claims description 14
- 239000012783 reinforcing fiber Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- -1 t-butylcyclohexyl Chemical group 0.000 claims description 5
- 239000013008 thixotropic agent Substances 0.000 claims description 5
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 229920001567 vinyl ester resin Polymers 0.000 claims description 3
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229920000271 Kevlar® Polymers 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 150000004679 hydroxides Chemical class 0.000 claims description 2
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 239000004761 kevlar Substances 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 150000001451 organic peroxides Chemical class 0.000 claims description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 229920005594 polymer fiber Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 12
- 239000006260 foam Substances 0.000 description 6
- 239000011888 foil Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 239000004922 lacquer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000009969 flowable effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- NOBYOEQUFMGXBP-UHFFFAOYSA-N (4-tert-butylcyclohexyl) (4-tert-butylcyclohexyl)oxycarbonyloxy carbonate Chemical compound C1CC(C(C)(C)C)CCC1OC(=O)OOC(=O)OC1CCC(C(C)(C)C)CC1 NOBYOEQUFMGXBP-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- RREGISFBPQOLTM-UHFFFAOYSA-N alumane;trihydrate Chemical compound O.O.O.[AlH3] RREGISFBPQOLTM-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/06—Unsaturated polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
- B29C2037/0035—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied as liquid, gel, paste or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
- B29C2037/0042—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied in solid sheet form, e.g. as meltable sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
- B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3055—Cars
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
Definitions
- the invention relates to low-pressure SMC for the production of fiber-reinforced components, methods for producing this low-pressure SMC, the use of this low-pressure SMC for the production of fiber-reinforced components and the components produced from this low-pressure SMC.
- SMC stands for "Sheet Molding Compound” and is the English name for a resin mat according to DIN 16913. SMC is generally used to refer to a flowable resin mat with isotropic properties and random fiber distribution in the mat plane. SMC is a flat resin mat based on unsaturated polyester resin or vinyl ester resin Glass fibers are usually used as reinforcement fibers, but other materials are also suitable for reinforcement: A typical SMC recipe consists of approx. 30% polymer, approx. 30% filler and approx. 30% glass fibers, the rest consists of additives together, such as color pigments, hardeners, dispersing aids and similar substances. SMC is produced from a resin master paste and reinforcing fibers. The resin master paste is applied to two carrier foils.
- carrier foils are drawn by the SMC machine and thereby transport the resin paste onto which the reinforcing fibers giant lt or be hung up. After the reinforcing fibers have been applied, both foils are pressed together so that a kind of sandwich is created. This sandwich is pulled through an impregnation line, which uses pressure and flexing movements to ensure that the fibers are evenly wetted with the resin. At the end of the machine, it is wound on rolls. A ripening process that can be initiated in a chemical and / or physical manner is of crucial importance. After this maturation process, the SMC can be processed further.
- the SMC is usually processed into molded parts in heated steel tools.
- the mold temperature is generally about 135 to 155 ° C.
- the decomposition of the hardener is started by the mold temperature and the molding compound undergoes an exothermic crosslinking reaction.
- the material is usually dosed manually. Maintaining precise dosing quantities is generally very important for problem-free production.
- the SMC is not only cut according to templates, but also weighed. Weighing out the blank serves as a control and enables a possible correction of the blank. Then the SMC is placed on the tool and the tool is closed. The pressure is applied and held until the molded part is completely hardened.
- the object of the present invention was therefore to provide SMC mats which can be used even at pressures ⁇ 10 bar, preferably from 1 to 2 bar and at temperatures ⁇ 70 ° C.
- the low-pressure SMC according to the invention could surprisingly be achieved by developing a special SMC recipe.
- the resin mixture must be able to completely compound the reinforcing fibers and to further process the SMC thus obtained to build and - 3 -
- the SMC according to the invention contains as a base paste a mixture of at least one unsaturated polyester resin or vinyl ester resin as the base component, at least one shrinkage-compensating additive, at least one hardener and additives.
- the base paste preferably contains at least one resin based on maleic acid, isophthalic acid or orthophthalic acid.
- Saturated polyesters for example based on polyurethane, polyvinyl acetate, polymethyl methacrylate, polystyrene or styrene-butadiene, or mixtures of these additives, are added to this base component as a shrinkage-compensating additive. Suitable components are known per se to the person skilled in the art and are commercially available for semi-finished SMC products.
- Organic peroxides that start at the lowest possible temperatures are used as hardeners. Examples include t-butyl per-2-ethylhexanoate, bis- (4-t-butylcyclohexyl) peroxydicarbonate, benzoyl peroxide and methyl isobutyl ketone peroxide. Mixtures of these peroxides, which are known per se in SMC technology, can also be used.
- this resin base paste also contains the usual additives known to those skilled in the art, such as additives to ensure storage stability, additives for deaeration, thixotropic agents, thickening aids, fillers and pigments, and, depending on the application, adhesives and / or release agents.
- additives include, for example, the known components which stabilize peroxide-containing UP resin batches, the known foam-inhibiting polymers, silicas such as, for example, aerosils, calcium carbonate, aluminum trihydrate, kaolin and barium sulfate. - 4 -
- the stock paste according to the invention contains 10 to 34% by weight, preferably 17 to 34% by weight, of unsaturated polyester resin, 1 to 15% by weight, preferably 1.5 to 13.5% by weight of shrinkage-compensating additive, and at least one hardener in amounts which preclude undercuring, preferably 0.1 to 2% by weight hardener.
- % preferably 4 to 24% by weight of fillers and up to 4% by weight, preferably 0.15 to 2% by weight of pigment, and, depending on the application, 1 to 15% by weight, preferably 1.5 to 13.5% by weight of adhesive and / or 1 to 2% by weight, preferably 1.2 to 1.8% by weight of release agent can be added.
- the resin paste is mixed with a thickener and applied to two carrier foils.
- Alkali and / or alkaline earth metal oxides or hydroxides and / or isocyanates can be used as thickeners.
- Magnesium oxide paste for thickening SMC, magnesium hydroxide and / or calcium hydroxide may be mentioned by way of example.
- 0.1 to 2% by weight, preferably 0.15 to 1.7% by weight, of thickening agent can be added to the stock paste.
- the carrier foils charged with the resin paste according to the invention are then drawn through the SMC machine as usual and sprinkled or coated with the reinforcing fibers.
- reinforcing fibers are embedded.
- the reinforcing fibers can be used as a mat, fabric, fleece or as clippings or as combinations of these shapes.
- Other possible reinforcing fibers are: carbon fibers, kevlar, aramid, polymer fibers or fibers made from renewable raw materials such as flax, hemp, banana or coconut. Combinations of these materials can also be used. - 5 -
- the rest of the process is the same as for standard SMC.
- the ripening process chemical and / or physical thickening
- the low-pressure SMC according to the invention thus produced can be processed further.
- the low-pressure SMC according to the invention can be used in a variety of ways. In particular, it can be used for the production of fiber-reinforced components, which should offer good temperature and media resistance as well as high rigidity, strength and impact strength even at low temperatures.
- the low pressure SMC is therefore particularly suitable for automotive parts and applications that are open to the public. Due to its good mechanical properties, the low-pressure SMC is also the ideal material for the electrical, furniture and sanitary industries. Because of its property of being processable even at low pressures and temperatures, the low-pressure SMC according to the invention is particularly suitable for producing sandwich elements.
- box bodies made of sheet steel, made of a steel-wood composite construction, and for temperature-controlled containers in particular bodies made of sandwich elements.
- sandwich elements have a cover layer and a core on the outside and inside.
- the cover layers can consist of metal or plastic materials.
- the sandwich elements used for temperature-controlled containers should preferably have a high degree of rigidity with a low weight.
- the floor area of the load from forklifts in the side - 6 -
- wall area can withstand the load from storey loading and in the roof area from the load by hanging loads. In order to be able to be used when transporting frozen products, for example, they have to ensure that the low transport temperature is maintained at high outside temperatures.
- plastic sandwich elements with a length of up to approximately 16,000 mm in various widths and thicknesses are known. The core of each of these elements is enclosed on all sides by plastic cover layers. There are no metallic thermal bridges in these elements. These sandwich elements are self-supporting and achieve a high payload for the entire vehicle due to their low weight. Depending on the dimensions of the container, they are manufactured in customized shapes.
- Such sandwich elements can be produced with the help of the low-pressure SMC according to the invention, for example in the following way:
- the shape required for the elements is cleaned as usual and adjusted to the required dimensions.
- the mold and the mold cover are provided with a release agent in order to be able to remove the finished element from the mold without problems.
- a gel coat fine-layer resin with a self-separating effect is preferably used. It consists, for example, of unsaturated, thixotropic polyester resin based on dicarboxylic acid neopentyl glycol in a highly reactive setting and is characterized by high water resistance and mechanical resistance.
- the gel coat can also be integrated in the low-pressure SMC according to the invention.
- a single-layer or multilayer film or lacquer film can also be inserted into the mold or into the mold cover.
- the insertion of the film can expediently be facilitated by suction using a vacuum.
- a multilayer film expediently consists of a carrier film with an applied layer of colored lacquer and clear lacquer. Several layers of lacquer can also be applied.
- the sandwich element can be individually designed using such a single-layer or multilayer or lacquer film. In this way, painting, so to speak, can be integrated into the manufacturing process of the sandwich elements according to the invention.
- the first layer of the low-pressure SMC webs is inserted.
- the foam sheets tailored to the vehicle, including any necessary reinforcements made of wood, metal or reinforcements made of low-pressure SMC sheets, are inserted into the mold.
- another low-pressure SMC web and the cover fleece is placed on top and the mold is coated with a release agent, gel coat or with a multi-layer or. Lacquered lid closed.
- the foam sheets which serve as spacers and insulation, should have a low density, high pressure resistance, low thermal conductivity and should also be environmentally friendly.
- Polyurethane plates or plates made of thermoplastic material, for example polystyrene, are advantageously used as the foam plate.
- a multi-layer low-pressure SMC structure of the sandwich elements is of course also possible, for example by providing not only cover layers and reinforcements made of low-pressure SMC, but also intermediate layers or other structures made of low-pressure SMC. - 8th -
- the closed mold is inserted into the hot plate press and at a temperature which depends on the hardener used and is sufficient for the hardener to start, preferably at about 60 ° C., a pressure which is sufficient for the intimate connection of the foam plates with the low-pressure SMC , preferably pressed at a pressure of 1 to 2 bar.
- the process for producing the sandwich elements according to the invention reduces the emission of hydrocarbons by using the low-pressure SMC.
- the low pressure SMC it is possible for the first time to obtain a significantly improved surface structure.
- the amount of waste liquid resin is significantly reduced.
- the new process offers a high level of automation compared to the state of the art.
- Figure 1 shows the schematic structure of a sandwich element according to the invention.
- the numbers mean: (1) gel coat; (2) surface fleece, (3) hardened low pressure SMC, (4) foam sheet.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU40304/99A AU4030499A (en) | 1998-03-30 | 1999-03-30 | Low-pressure sheet moulding compound |
EP99923411A EP1082379A1 (fr) | 1998-03-30 | 1999-03-30 | Smc basse pression pour la production d'elements renforces aux fibres |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19814037.1 | 1998-03-30 | ||
DE19814037 | 1998-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999050341A1 true WO1999050341A1 (fr) | 1999-10-07 |
Family
ID=7862868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/002473 WO1999050341A1 (fr) | 1998-03-30 | 1999-03-30 | Smc basse pression pour la production d'elements renforces aux fibres |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1082379A1 (fr) |
AU (1) | AU4030499A (fr) |
DE (1) | DE19913994A1 (fr) |
WO (1) | WO1999050341A1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2390328A (en) * | 2002-05-30 | 2004-01-07 | Polymer Engineering Ltd | A method of making a moulded component using LPSMC |
EP1336462A3 (fr) * | 2002-02-16 | 2004-03-24 | Bayerische Motoren Werke Aktiengesellschaft | Elément de structure thermoplastique |
EP1816178A1 (fr) | 2006-02-01 | 2007-08-08 | POLYNT GmbH & Co. KG | Matier à mouler contenant des pigments luminescent |
US20100310823A1 (en) * | 2007-10-03 | 2010-12-09 | Acell Group Limited | Composite products |
US20110262721A1 (en) * | 2008-10-20 | 2011-10-27 | Aldino Albertelli | Patterned composite product |
CN103242633A (zh) * | 2013-05-22 | 2013-08-14 | 成都艾珀耐特复合材料有限公司 | 一种采光用耐候性复合材料、采光板及其制备方法 |
WO2017149031A1 (fr) | 2016-03-04 | 2017-09-08 | Covestro Deutschland Ag | Procédé pour la fabrication de composants composites fibreux |
US12083773B2 (en) | 2017-07-31 | 2024-09-10 | Acell Industries Limited | Method for producing cured polymeric skins |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003226674A1 (en) * | 2002-03-21 | 2003-10-08 | Menzolit Fibron Gmbh | Method for coating fiber-reinforced plastic structural parts and structural part so produced |
DE102012216549A1 (de) * | 2012-09-17 | 2014-05-28 | Bayerische Motoren Werke Aktiengesellschaft | Kraftfahrzeug |
DE102012216545A1 (de) * | 2012-09-17 | 2014-05-28 | Bayerische Motoren Werke Aktiengesellschaft | Kraftfahrzeug |
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GB2193143A (en) * | 1986-07-30 | 1988-02-03 | Litholite Mouldings Limited | A moulded unsaturated resin article |
JPH0351108A (ja) * | 1989-07-19 | 1991-03-05 | Mitsubishi Plastics Ind Ltd | 樹脂含浸繊維シート成形品の成形方法 |
JPH04209632A (ja) * | 1990-11-30 | 1992-07-31 | Ashimori Ind Co Ltd | 管路の内張り材 |
JPH04348155A (ja) * | 1991-01-31 | 1992-12-03 | Dainippon Ink & Chem Inc | シートモールディングコンパウンド |
WO1993007102A1 (fr) * | 1991-10-08 | 1993-04-15 | Menzolit | Matiere a mouler a effet decoratif |
EP0598227A1 (fr) * | 1992-10-19 | 1994-05-25 | Takeda Chemical Industries, Ltd. | Composition moulable à basse pression et à basse température et objets formés |
JPH06182764A (ja) * | 1992-12-21 | 1994-07-05 | Nikko Co | 人造大理石の製造方法 |
DE29500033U1 (de) * | 1995-01-03 | 1995-02-23 | Basf Ag, 67063 Ludwigshafen | Hochflammfeste Bauteile |
-
1999
- 1999-03-30 AU AU40304/99A patent/AU4030499A/en not_active Abandoned
- 1999-03-30 DE DE19913994A patent/DE19913994A1/de not_active Withdrawn
- 1999-03-30 WO PCT/EP1999/002473 patent/WO1999050341A1/fr not_active Application Discontinuation
- 1999-03-30 EP EP99923411A patent/EP1082379A1/fr not_active Withdrawn
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GB2193143A (en) * | 1986-07-30 | 1988-02-03 | Litholite Mouldings Limited | A moulded unsaturated resin article |
JPH0351108A (ja) * | 1989-07-19 | 1991-03-05 | Mitsubishi Plastics Ind Ltd | 樹脂含浸繊維シート成形品の成形方法 |
JPH04209632A (ja) * | 1990-11-30 | 1992-07-31 | Ashimori Ind Co Ltd | 管路の内張り材 |
JPH04348155A (ja) * | 1991-01-31 | 1992-12-03 | Dainippon Ink & Chem Inc | シートモールディングコンパウンド |
WO1993007102A1 (fr) * | 1991-10-08 | 1993-04-15 | Menzolit | Matiere a mouler a effet decoratif |
EP0598227A1 (fr) * | 1992-10-19 | 1994-05-25 | Takeda Chemical Industries, Ltd. | Composition moulable à basse pression et à basse température et objets formés |
JPH06182764A (ja) * | 1992-12-21 | 1994-07-05 | Nikko Co | 人造大理石の製造方法 |
DE29500033U1 (de) * | 1995-01-03 | 1995-02-23 | Basf Ag, 67063 Ludwigshafen | Hochflammfeste Bauteile |
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DATABASE WPI Section Ch Week 9237, Derwent World Patents Index; Class A18, AN 92-304167, XP002114671 * |
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DATABASE WPI Section Ch Week 9431, Derwent World Patents Index; Class A13, AN 94-252165, XP002114674 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1336462A3 (fr) * | 2002-02-16 | 2004-03-24 | Bayerische Motoren Werke Aktiengesellschaft | Elément de structure thermoplastique |
GB2390328A (en) * | 2002-05-30 | 2004-01-07 | Polymer Engineering Ltd | A method of making a moulded component using LPSMC |
GB2390328B (en) * | 2002-05-30 | 2005-10-26 | Polymer Engineering Ltd | Moulded components |
EP1816178A1 (fr) | 2006-02-01 | 2007-08-08 | POLYNT GmbH & Co. KG | Matier à mouler contenant des pigments luminescent |
US20100310823A1 (en) * | 2007-10-03 | 2010-12-09 | Acell Group Limited | Composite products |
US11904557B2 (en) | 2007-10-03 | 2024-02-20 | Acell Industries Limited | Composite products |
US10800135B2 (en) * | 2007-10-03 | 2020-10-13 | Acell Industries Limited | Composite products |
US10479054B2 (en) * | 2008-10-20 | 2019-11-19 | Acell Industries Limited | Patterned composite product |
US11590715B2 (en) | 2008-10-20 | 2023-02-28 | Acell Industries Limited | Patterned composite product |
US20110262721A1 (en) * | 2008-10-20 | 2011-10-27 | Aldino Albertelli | Patterned composite product |
CN103242633B (zh) * | 2013-05-22 | 2015-07-01 | 成都艾珀耐特复合材料有限公司 | 一种采光用耐候性复合材料、采光板及其制备方法 |
CN103242633A (zh) * | 2013-05-22 | 2013-08-14 | 成都艾珀耐特复合材料有限公司 | 一种采光用耐候性复合材料、采光板及其制备方法 |
WO2017149031A1 (fr) | 2016-03-04 | 2017-09-08 | Covestro Deutschland Ag | Procédé pour la fabrication de composants composites fibreux |
US12083773B2 (en) | 2017-07-31 | 2024-09-10 | Acell Industries Limited | Method for producing cured polymeric skins |
Also Published As
Publication number | Publication date |
---|---|
DE19913994A1 (de) | 1999-10-07 |
AU4030499A (en) | 1999-10-18 |
EP1082379A1 (fr) | 2001-03-14 |
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