WO2009017387A2

WO2009017387A2 - Composites and methods of the articles manufacturing by using based on plastic matrix organic fibers filled composites, by plastic injection molding method

Info

Publication number: WO2009017387A2
Application number: PCT/LV2008/000005
Authority: WO
Inventors: Raimonds Cirulis
Original assignee: Rungis, Aigars
Priority date: 2007-07-30
Filing date: 2008-07-30
Publication date: 2009-02-05
Also published as: LV13891B; LV13891A; WO2009017387A3

Abstract

The invention is related to different articles manufacturing methods, which include especial composites with cellulose nature fibres filament as reinforcement as well plastics replacement, considering also the uses of gas or gas-water assisted injection, in order to reach the articles with hollow reinforcement ribs. By optimizing the reception of composites, it is possible to increase the filament level of the fibres, keeping still good flow properties, reduce the manufacturing cycle time, as mentioned composites has the properties of crystallization at higher temperatures. The composites will better bio-destruct when landfilled, and because of especial receptions of the composites, uses of gas or gas- water assisted injection moulding is less limited in manufacturing of the articles with hollow structures within the article. Uses of hollow reinforcement ribs reduce the weight of the articles, as providing higher strength of the article, and increase overall physical-mechanic properties of the articles thereby. The same time, high level fibres filament (above 40%) uses in plastic matrices has low flow properties to be used in combination with gas or gas- water assisted injection moulding, especially, if the reinforcement ribs has complex curved configuration. This problem particularly is solved by especial properties of the compounds offered. This problem is also fully solved by using plastic co-injection in forming process of hollow channels with gas or gas-water assisted injection moulding, as co-injected plastic before gas or gas-liquid injection is forming the protective layer within a channel. As the result, the absorption character of the composites is reduced, and it is possible to form more long,complex nature, hollow channels, using high level filament (above 40% and more) of the organic, also mineral fibres, in plastic matrix based composites.

Description

Composites and methods of the articles manufacturing by using based on plastic matrix organic fibers filled composites , by plastic injection molding method

Description

(OOOl)The invention is related to the plastic matrix based composites with high level of fϊllament as well based on them articles manufacturing with plastic injection molding technologies in combination with gas or gas—liquid injection support method, including plastic co-injection method used. This method is especially suitable for such an articles manufacturing as pallets, one-piece chairs, boxes, body parts of the automotive, large size cable bobbins, other products manufacturing where low weight, high mechanical properties, aesthetic design and high requirements to the ecological aspects of the articles are demanded- their recyclability, biodestruction, reduced energy consumption in their manufacturing process.

(0002)The invention is related as well to innovative receptions of the composites, which are usable without above mentioned gas or gas-liquid assisted injection molding method used, and are usable for the articles manufacturing by using standard plastic injection molding technology.

Background of the invention

(0003)There are well-known different polyprophilene and polyethilene matrix based composites, which are usable for different articles manufacturing with plastic injection molding method. Such a receptions are accesible trough webpage : www.n-fiberbase.net or http://mbase.aixhibit.de/nfibrebase/homepage/english/index.html.

(0004)High physical-mechanic properties of the materials where polypropylen or polyethylen matrix is used and which are suitable for plastic injection molding, can be reached by high level fillament with flax, hemp, sizal and other such a kind fibers used, but mostly such a composites has low flow index, requiring high pressure plastic injection molding machines to be used. Besides, high level of fillament into PP/PE matrixes make the composite brittle.

(0005)With woodfibers , rice fibers, bamboo fibers filled PP/PE matrixes in comparision are more brittle and with lower physical-mechanic properties nor hemp, flax, sizal and other such a kind fibers used in compostes, for example, Jer Envirotech (Canada) is offering woodfibers- PP matrix based composite with 40% of woodfibers fillament, where tensile module is 3707.03 psi (Mpa) and impact module is 24,25 psi(MPa) /according ASTM D-638 stand arts/.

(0006)It is known that nanoadditives -such as nanoclay, aluminum oxide nanopowder - radically improve tensile and impact properties of the plastic . There has been not found mentioned components use in complex organic fibers filled , plastic matrix based composites.

(0007)It is known that by high capacity radiation impacted polypropylene/polyetylene tensile and impact properties are increasing for 30-50%, but there has been not stated in a such of way impacted fibers uses in combination with organic origin fibers into plastic matrix based composites, with the target to improve the materials physical-mechanic properties and to provide better coupling with polyethylene or polyprophylene matrixes. (0008)The company "IKEA" use polyprophylene-woodfibers composite for manufacturing of multi-partial chairs, where the organic fibers fillament level is below 40%, by using gas assisted injection molding technology to manufacture the hollow nature details.The physical- mechanic properties of the material are lower alike materials with flax, hemp, sizal or such a kind fibers filled plastics.

(0009)By using gas or gas-liquid assisted injection molding technologies, traditionally are used the materials, which plastic type matrix is not filled with reinforcing elements, or their reinforcement elements -such as glassfiber, polyesther fibers, numeral, the fillaments level into matrixes does not exceed 40%.

(OOlO)Patent CN 1837277 is protecting inorganic nanoparticles and plastic- woodfibers composites with recepie: 24-98 % plastic, 0-70 % organic fibers, 1-30 % inorganic nanoparticles.

(OOll)Patent CN 1850900 is protecting a composite: 100/25 -100/170 parts of the weight polyprophylene-woodfibers mixture, 1-40 parts of the weight nanometric density intensificator, 0-10 parts chlorinated polyethylene, 1.0-3.0 antioxydant, 0.5-3.0 parts polyethylene vax, 0.5-3.0 parts stearine acid , and 2.0-10% nanometric density dispersion agent/.

(0012)Patent US 7151125 is protecting polymer-cellulosic fibers composite, which consist from polymer-cellulose fibers composition, where from 30 to 70% is usded polymer, from 70 to30%-cellulose fibers and 1 to 7% lubricant.

(0013)In patent US 2003087994 is described flax fibers-polymer composition, as well the compositions which contain flax, wood and other cellulose fibers, inorganic fillaments and PVC, polypropylene or HDPE.

(0014)Gas assisted injection molding method in order to make the plastic articles with hollow nature reinforcment ribs is described in patent US 5308574.

(0016)Gas-liquid and liquid assisted injection molding method to make hollow chanels in plastic has described a company "BASF": http://www.basf.com/businesses/plasticportal/water_assist_injection_molding.htm.

(0017)This method is used by Battenfeld /((Battenfeld Aquamold), also, such an equipment is manufactured also by "PME Fluidtech" (germany), "Maximator" (Germany) , "Technologie in Kunststoff GmbH" (Germany).

(0018)Plastic co-injection method, by using gas or gas-liquid injection method in combination with plastic injection, in order to acquire the hollow reinforcment ribs with hollow bodies in articles, is known and described by company Bayer Polymers: http://www.bayerone.com/gas-assist/ctc.htm /.

(0019)Gas-Iiquid injection systems use in palastic articles manufacturing is described in patents GB 2419843, EP 1645394 , US 6 896 844 B2 and in other patents. (0020)Patent application WO2007036037 (Canada) and patent application US 20070077379 Al is stated cellulosic fibers-plastic composite use for articles manufacturing , by water assisted injection creating the channels structure into articles, where cellulosic fibers usage in composites does not exceed 40% , the chanels has stright nature design and they are comparable short.

(002I)It is very difficult to achieve complex nature configuration , long chanels in plastic matrix composites with organic fibers fillament level exceeding 40%, as it has been stated by trials and existing technologies investigation.

(0022)The problem is based in following obstacles: composites with high fillament level has high inner friction and coefficient of absorbtion, thereby complex shape, long chanels forming is incommodious,

- the fibers are piling and blocking, as well absorbing the gas or gas-water presure,

- the inner walls of the chanels are reached by having porous chatacter, thereby the physical- mechanic properties of the articles in those alocations are reduced , which is to be avoided if the material could have the desity.

The goals of invention

(0023 )To use plastic injection molding technology and high ( 40-65%) fillament level compond materials , including such a type which are biologically diestructing and contain natural fibers-flax,cotton, hemp,woodfibers e.t.c, and thermoplastic compounds (monomeres, ologomeres or polymer compositions) as couplers for different articles manufacturing, in combination with plastic co-injection include ;

(0024)To offer the technological solusion for the articles manufacturing, by using above mentioned comosites and gas or gas-liquid assisted injection method , including , in combination with plastic co-injection;

(0025)Before mentioned problems solving, which are related with high , above 40% cellulosic fibers fillament level in plastic matrixes, by using gas or gas-water assisted injection support method on articles manufacturing, are offerd following solutions:

Plastic and gas or liquid co-injection method is realized in a way as until the composite mass is still viscosous in locations of the article channels , but the part of the composite mass near the mold inner surface has been already crystalized, the plastic co- injection is performed, by immediate following gas injection after it. If to use Gas -liquid assisted injection, immediate after snail amount of the gas injected, the liquid is to be injected. As the result of gennerated pressure by gas or gas/liquid the plastic together with still non-cry stalized composite is pushed longitudinally forward the channel. In a such of way, the co-injected plastic is forming the backing layer.

(0027)As the result of such a type gas or gas /liquid assisted co-injection, the gas or liquid does have not direct contact with the composite, but the pressure impact happens in direct way. As the result, the hollow chanels are formed even in articles, where the the speciffic amount of the plastics into composites are lower than 50% and even 35% (see Fig.2), in addition, the inner walls of the channels has been reached non-porous and dense, the configurations of the cannels are possible to be with comparative sharp curves and comparative longer ( see Fig.4, Fig.5, Fig.6). -A-

The method in adition increase the tenacity of the articles as the plastic layer in hollow chanels is performing as sandvich, and is preventing the porous character of inner surface of the hollow channels ( which weaken the physical-mechanic properties of the article).

(0028) For realization of the invention are used special receptions of the composites, which major feature is the wood and/or rice and/or bamboo or other such a type fibers uses in combination with plants fibers (flax, sizal, kenaf and other such a type) fibers in predicted proportions, as in a such of the way it is reduced the inner friction during injection molding process and during the gas-liquid injection process, in several occasions, but nott obligated, in order to improve the articles physical-mechanic properties, by adding:

- nanoclays or other nanofibers

- with radiation impacted polypropylene/polyethylene fibers 4-40 mm lenght

- other high temperature melt index or thermally stable fibers

(0029) In mentioned Fig.l, where in intersection schematically is explained the problem of forming the chanel with high level of the fibers fillament into plastic matrixes, are used following notations:

-(l)-mold ; (2)- composite injection chanel; (3)-gas or gas-liquid injector (5)- injected composite with high fillament level of fibers into plastic matrix ; (7)-chatacter of resulted hollow chanel .

(0030) In mentioned Fig.2, where in intersection schematically it is shown the way of channel forming solution by using high fillament level of the fibers into plastic matrixes, are used following notations:

(lA)-mold ; (2A)- injection channel of composite; (3A)-gas or gas-liquid injector ;(4)-plastic co- injection injector (5)- injected high fillament level of the fibers into plastic matrixes composite ;(6)- co-injected plastics , which is forming the backing layer during the forming of the channel (7A)-the character of the processed hollow channel.

(0031) Fig.3, where in intersection view scematically are shown different shapes of channels ( but not limited by these) , are used following notations:

(8)- corpey of the article ; (9B), (9C),(9D),(9E),(9F),(9G)-different configurations of hollow channels.

(0032)As the results of the tests with the composites has shown, mentioned formulations/compositions (see charpers of formula from 1 to 23), has following, differing from known , features:

(0033)offered composites are providing possibility the articles to form even at +80/+85 degrees Celsium hot molds , as the crystallization of the materials begins at temperature +125/+130 ⁰C , resulting to shortened manufacturing cycle time and consumption of energy ( to compare , it is to be noted that polyprohylene and polyethylene traditionally is formed in + 30 ⁰C hot molds, and the cooling time is much longer nor organic fibers filled composites);

(0034)offered composites provide possibility to achieve thicker walls of the articles (6- 8mm)without loosing of the manufacturing cycle time, to comapre with thin- walled (3-5 mm) Polyprophylene or Polyerhylene made articles injection molding cycle time;

(0035) offered composites provide possibility to produce the articles with high physical- mechanic properties of the articles, which 2-2,5 times exceed the physical-mechanic properties of the most polyprophylene and polyethylene materials. - -

The objects of the invention are:

(0036) A) especial receptions of the composites/compositions, also in combination with gas, gass-liquid supported injection molding method, in combination with plastic co-injection ( but not obligate), in order to acquire the articles with high filament level of organic fibers into organic and inorganic plastics matrixes;

(0037)B) methods of the articles manufacturing with gas or gas-loquid assisted injection molding, in combination with plastic co-injection for the articles manufacturing with the plastic injection molding method, by using above mentioned composites;

(0038)C) mentioned receptions of the composites/compositions and mentioned articles manufacturing menthod for different articles manufacturing , including chairs, pallets, boxes, cable bobbins manufacturing (but not limited to) , by using plastic injection molding method and above mentioned composotes A) in relation with gas or gas-liquid injection, as well plastic co-injection in combination with gas, gas- liquid injection.

(0039)The object A) of Invention essence is explained in Claims paragraphs from A to 19, where it is defined several variations of the composites

(0040)The object B) of Invention essence is explained in Claims paragraphs from 20 to 22, where it is defined the variations of realization of several mentioned methods, by using comppsitions in accordance with Claims from 1. to 15.

(0041)The object C) of Invention essence is explained in Claims paragraph 23, where it is defined the mentioned conposites A) and methods B) different uses in specific articles manufacturing, which constructions schematically are shown in Fig.4, Fig. 5 , Fig.6 un Fig.7, where:

(0041)- Fig.4, where schematically is shown the example of hollow reiforcement ribs of pallet, there are used following notations: (8)- basic corpey of the article , (9), (9H)- hollow reinforcement ribs;

(0042)Fig.5, where schematically is shown the constuction of the tare box , there are used following notations: (8)- basic corpey of the article, (9i)-hollow reinforcement ribs,(13)- plastic and/or gas and/or liquid possible co-injection alocation;

(0043)-Fig.6, where shematically is shown the construction of segmented cable bobbin, there are used following notifications: (8)- basic corpey of the article, (9j)- hollow reinforcment ribs, (10) and (H)- interconnection components between the segments, (13)-plastic and or gas and/or liquid co-injection posible alocation;

(0044)-Fig. 7, where schematically is shown the featured construction (segment of the chair) having cell-type , here used high tenatility, especial reception composites, there are used following notifications: (8) basic corpey of the article, (14) -relief type , celled surface of the article. (0045)Offered receptions of the composites are specific :

- by such, that they do have increased level of organic fibers filament in specific proportions together with additives, why it is less limited gas or gas-liquid co-injection uses in articles manufacturing

- by such, that most of them are achievable to be biodegradable when landfilled

- by such, that they have increased tenatility, as the result of the composites content

(0046)In result of mentioned comositions A) and methods B) uses , the aquired articles C) are as following (but not limited to):

-pallets with cofiguration and alocations of hollow reinforcment ribs , which are processed by gas-liquid co-onjection method, accordingly reducing the self- weight and increasing the tenability of the article (Fig.4)

-chairs having relief type of cells type constuctive solution, where, thanks to cell-type construction, the articles with increased tenability are reached (Fig.7)

-tare boxes with structured hollow chanels , which perform as reiforcement ribs, reached by uses of hollow chanels (Fig 5).

-cable bobbins with their segmented character , as well reinforcment ribs, performed by hollow channels (Fig.6).

(0047)As the materials of the all mentioned articles to be manufactured, has been used the compositions, where cellulosic and/or plants origin fibers are combined with sythetic polymer fibers and/or pellets and/or powder. Besides, as the raw material (matrixes) for composites manufacturing can be used thermoreactive plastics as well recycled polymers and different source fibers compositions, not only speciffied in this invention.

(0048)Acceptabe into compsitions the uses or not of the colorants, as well "Mold Perfect" type chrystalization agents, considering the same time that the colorants will improve the visual properties of the articles , but "Mold Perfect" type of crystalizators initiate the composite crystalization at higher temperatures. Especially is is to be noted that in mentioned recepies included strong radiation impacted fibers , as well PET increase the articles physical- mechanic properties , including impact strenght, tensile strenght, thanks to that the properties of the mentioned fibers are higher nor OE, PP as well natural fibers properties. Besides that, radiation impacted fibers has high melt index , but PET flow temperature is 220-230⁰C, which is for 40-60⁰C higher nor mentioned composites flow temperature. In result, the reinforcment of the composite is reached, as wood fibers reinforcment alone do not provide sound results and above 35% of the fillament the tensile and impact properties of the composite evean are reducing. Besides, mentioned fibers can particularly or in full to replace flax, sizal, hemp and other such a kind of fibers usage in mentioned composites, in lieu of it using woodfibers, straws and other low cost fibers.

(0049)By target to provide the forming of the hollow channels, it has been used the plastic co- injection within the cycle of gas or gas-liquid supported injection molding in manufacturing process (Fig.2), which heretofore is difficult to do by composites having high level of filament with organic fibers, especially, large size articles, where reasonable is to use complex configuration reinforcment ribs, as the compsite is blocking, and forming of longer section hollow channels is especially limited.

Claims

1. Composition containing:

-Polyprophylene- from 40 to 60%;

-flax fibers or hemp fibers, or sizal fibers, ot other such a kind of fibers, their combinations- from 10 to 30%

-nanoclay from 5 to 30%

-small sized wood or bamboo fibers, or rice hulls-from 15 to 25%

-by strong radiation impacted polyethylene or polyprophylene fibers , cutted in a lengthό-

40mm, -form 4 to 25%,

-"Mold Perfect" kind of (proprietry coated nucleating additive) chrystallization agent, different in plastic industry commonly used additives, such as moisture absorbents, anti- pyrens, anti- bactericides e.t.c, but not obligate, and coupling agents - the rest of %

2. Composition containing:

-Polyprophylene- from 30 to 40%;

-flax fibers or hemp fibers, or sizal fibers, ot other such a kind of fibers, their combinations- from 20 to 25%

-nanoclay from 5 to 30%

-small sized wood or bamboo fibers, or rice hulls-from 15 to 20%

40mm, -form 10 to 25%,

-coupling agents- 1-3%

-colorant additives- 1-3%

-additives which initiate the biological destruction by bacterias when landfilled- 1-2%

3.Composition containing:

-Polyprophylene- from 30 to 40%;

-flax fibers or hemp fibers, or sizal fibers, ot other such a kind of fibers, their combinations- from 20 to 30%

-nanoclay from 5 to 30%

-small sized wood or bamboo fibers, or rice hulls-from 4 to 15%

-by strong radiation impacted polyethylene or polyprophylene fibers , including colored ones, cutted in a length 6-40mm, -form 10 to 25%,

-coupling agents- 1-3%

-colorant additives- 1-3%

-different aditives-the rest of %

In result is acheved following quarranteed physical-mechanic properties -tebsile strenght no less than 4200 psi (Mpa), impact strenght no less than 30psi (Mpa).

4.Composition containing:

-Polyprophylene- from 40 to 60%;

-small sized wood or bamboo fibers, or rice hulls-from 4 to 15%

-by strong radiation impacted polyethylene or polyprophylene fibers , including colored ones, - - cutted in a length 6-40mm, -form 10 to 25%,

-glassfiber, cutted in a lenght of 4-20mm, 10-25%

-coupling agents- 1-3%

-colorant additives- 1-3%

-different aditives-the rest of %

5.Composition containing:

-Polyprophylene- from 40 to 60%;

-small sized wood or bamboo fibers, or rice hulls-from 4 to 25%

-coupling agents- 1-3%

-colorant additives- 1-3%

-different aditives-the rest of %

6.Composition containing:

-Polyprophylene- from 40 to 60%;

-small sized wood or bamboo fibers, or rice hulls-from 4 to 15%

-glassfiber, cutted in a lenght of 4-20mm, 5-20%

-coupling agents- 1-3%

-colorant additives- 1-3%

-different aditives-the rest of %

In result is acheved following quarranteed physical-mechanic properties -tebsile strenght no less than 4600 psi (Mpa), impact strenght no less than 34psi (Mpa).

7.Com position containing:

-any type of biopolymers with high physical-mechanic properties 10 to 60%;

-polyprophylene - 10-30%

-small sized wood or bamboo fibers, or rice hulls-from 4 to 15%

-glassfiber, cutted in a lenght of 4-20mm, 10-25%

-coupling agents- 1-3%

-colorant additives- 1-3%

-different aditives-the rest of %

8. Composition in acordance with paragraphs 2 to 7 , which as support contain different additives traditionally used in plastic industry , such as moisture absorbents, including starch based, anti-pyrens, anti-bactericides e.t.c.

9. Composition in acordance with Claims 2 to 7, which provide following opportunities: to perform the injection molding of the articles in a molds having the temperature +80/+85 degrees Cesium, in a such of way reducing the manufacturing cycle time and souces used , by adding the crystallization agents , such as "Mold Perfect"; to achieve more thick walls of the articles (6-8mm) without reducement of the manufacturing speed , comparing with crystallization agents , such as "Mold Perfect", providing high physical-mechanic properties of the material, which 2-2,5 times exceed polyprophylene, polyethylene materials physically-mechanic parameters.

10. Compsition for pallets, tare boxes, cable bobbins and other large size articles manufacturing, containing:

-Polyprophylene or Polyethylene, including recycled- from 35 to 60%;

-flax fibers or hemp fibers, or sizal fibers, ot other such a kind of fibers, their combinations- from lO to 15%

-small sized wood or bamboo fibers, or rice hulls-from20 to 30%

-by strong radiation impacted polyethylene or polyprophylene fibers , including colored ones, cutted in a length 6-40mm, -form 10 to 20%,

-polymer crystallization agents - 1-2%

-coupling agents- 1-3%

-other additives-the rest%

11. Composition containg:

-Polyprophylene or Polyethylene, including recycled- from 35 to 60%;

-small sized wood or bamboo fibers, or rice hulls, or grinded straws-from 20 to 30%

-PET fibers including colored ones, cutted in a length 6-40mm, -form 10 to 20%,

-polymer crystallization agents - 1-2%

-coupling agents- 1-3%

-other additives (but not obligated)-the rest%

12. Composition containing:

-Polyprophylene or Polyethylene, including recycled- from 35 to 60%;

-small sized wood or shugarcane fibers, or rice hulls, or grinded straws-from 25 to 40%

-PET fibers including colored ones, cutted in a length 6-40mm, -form 10 to 20%,

-"Mold Pefect" type polymer crystallization agents - 1-2%

-coupling agents- 1 -3 %

-other additives (but not obligated)-the rest%

13. Composition containing:

-Polyprophylene or Polyethylene, including recycled- from 35 to 60%;

—by strong radiation impacted polyethylene or polyprophylene fibers , including colored ones, cutted in a length 6-40mm, -form 10 to 25%,

-"Mold Pefect" type polymer crystallization agents - 1-2%

-coupling agents- 1-3%

-other additives (but not obligated)-the rest%

14.Composition in acordance with any Claims 10 to 13 , where as support are added nanofibers, including nanoclays, as well the fibers such as basalt, carbon, glass and/or mineral fillers, as well different in plastic industries commonly used additives, such as colorants, moisture absorbents, antipyrens, antibactericides, starch, as well lubricants e.t.c, as well additives initiating biological destruction, when landfilled, by impact of bacterias;

15.Composition in acordance with any Claims 10 to 13 , which is replacing polyprophylene or polyethylene with any other widelly used plastics with melt flow temperature under + 190⁰C and which additionally to the natural fibers contain mineral fillers, and different in plastic industries commonly used additives such as colorants, moisture absorbents, anti-pyrens, anti-bactericides as well lubricants e.t.c; lό.Composition in acordance with any Claims 10 to 15 , which is replacing PET fibers with any other with melt flow temperature below + 200⁰C and which additionally contain mineral fillers and different in plastic industries commonly used additives such as colorants, moisture absorbents, anti-pyrens, anti-bactericides as well lubricants e.t.c;

17. Composition in acordance with any Claims 10 to 16, where the volume of the matrix into the composite is increased , but filaments volume reduced for the equal amount;

18. Composition in acordance with any Claims 10 to 17, where to the composite is added natural caoutchouc , replacing a part of matrix, in order to improve the impact strenght of the articles

19. Composition in acordance with any Claims 10 to 18, where as the colorants of the composites are used natural mineral colorants in a form of powder, which by added, will more speed up the composuite crystallization process during the articles manufacturing;

20. Method of the articles manufacturing, by using any above mentioned composition, which is characteristic with a way the articles are manufactured, by using following manufacturing stages and technologies, by plastic injection moulding into moulds ( Fig. No2):

- first step: the articles are manufactured with traditional plastic injection molding methods in 2- or more partial moulds, by injecting into them heated up composite in a range of temperatures +160-+190⁰C (depending from type of the matrix used) by pressure, until the mold is filled up;

- second step: the mod is started to be cooled; - third step: when cooling down composite nearing the mold begin crystalizing, the forming of hollow channels cycle begins before gas or gas-liquid injection the small

- amount of plastics at location of reinforcment ribs of the article;

- fouth step: a gas in small amout is injected ;

- fifth step: the liquid is injected by presure 200-600 bars (depending from features of the article and lenght of reinforcement ribs), in result of which the non-chrystallized part of the composite is moved forward . Rest of the composite is conveyed into specially for this purpose made bilde in a mold

- sixt step: the gas injection is repeated in order to convey out in channels remaining liquid;

- seventh step: the mold is aditionally cooled , until the article into the mold until +30-+80 0C ( depending from the content of the composition) , the mold is opened, the article is taken out, and the next cycle of the articles manufacturing begins.

21.Method of the articles manufacturing, by using any above mentioned composition, which is characteristic with a way the articles are manufactured, by using following manufacturing stages and technologies, by plastic injection moulding into moulds:

- second step: the mould is started to be cooled;

- third step: the gas is injected by presure 200-600 bars (depending from features of the article and lenght of reinforcement ribs), in result of which the non-crystallized part of the composite is moved forward . Rest of the composite is conveyed into specially for this purpose made bildes in a mold;

- fourth step: the mold is additionally cooled , until the article into the mold until +30- +80⁰C ( debepding from content of the composition) , the mold is opened, the artisle is taken out, and beins the next cycle of the articles manufacturing.

22. Method of the articles manufacturing, by using any above mentioned composition, which is characteristic with such, that the articles are manufactured by traditional plastic injection moulding methods in 2- or more partial moulds, by injecting into them heated up composite by pressure, cooling down the mould, opening it and taking out the article, by following a new cycle of the manufacturing begins. As the result of mentioned method the articles are manufactured where it is not required to have hollow reinforcement channels, by using in Claims 1 to 19 mentioned compositions.

23. Features of the reinforement channels configurations and examples of their geometry, by using any before mentioned composition, sharasteristic by such, that by using in paragraphes 20 and 21^st mentioned methods of the articles manufacturing, the articles with complex and comparative long, hollow reinforcement ribs are acquired, besides, by using in paragraph 20 mentioned method, the inner surface of the reinforcement ribs of the articles is acquired non-porous (Fig. No2, Fig. No 3, Fig. No 4, Fig No 5, Fig. No 6).