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WO1999030888A1 - Dispositif et procede pour la fabrication d'articles revetus au trempe, sans talc et a faible teneur proteique, notamment de gants chirurgicaux et d'examen - Google Patents

Dispositif et procede pour la fabrication d'articles revetus au trempe, sans talc et a faible teneur proteique, notamment de gants chirurgicaux et d'examen Download PDF

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Publication number
WO1999030888A1
WO1999030888A1 PCT/EP1998/007076 EP9807076W WO9930888A1 WO 1999030888 A1 WO1999030888 A1 WO 1999030888A1 EP 9807076 W EP9807076 W EP 9807076W WO 9930888 A1 WO9930888 A1 WO 9930888A1
Authority
WO
WIPO (PCT)
Prior art keywords
bath
coating
treatment
aftertreatment
dipping
Prior art date
Application number
PCT/EP1998/007076
Other languages
German (de)
English (en)
Inventor
Winfried Lehmann
Wilhelm MÜNCH
Francisca MÜNCH
Original Assignee
Münch Chemie Labor Gmbh
Rösner-Mautby Meditrade Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19803239A external-priority patent/DE19803239C2/de
Application filed by Münch Chemie Labor Gmbh, Rösner-Mautby Meditrade Gmbh filed Critical Münch Chemie Labor Gmbh
Priority to AU16669/99A priority Critical patent/AU1666999A/en
Priority to EP98961140A priority patent/EP1039992A1/fr
Publication of WO1999030888A1 publication Critical patent/WO1999030888A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/003—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/14—Dipping a core
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/52—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2805—Mixing plastics, polymer material ingredients, monomers or oligomers
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/34—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station
    • B29C33/36—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station continuously movable in one direction, e.g. in a closed circuit

Definitions

  • the present invention relates to an apparatus and a method for producing powder-free, low-protein diving articles, in particular surgical and examination gloves, according to the preamble of patent claims 1, 2 or 13.
  • diving articles are made from latex by introducing immersion molds into a suitably filled coating bath and then vulcanizing and post-treating.
  • the process control is preferably carried out continuously using a chain or belt conveyor system.
  • the immersion molds are first completely immersed in the coating bath so that a surface film can form on the immersion molds. After removal of the immersion molds from the coating bath, the surface film which has formed on the immersion molds by wetting with latex is subjected to vulcanization. As a result, the latex constituents are crosslinked in the surface film, the latex assuming its ultimate elasticity.
  • a high level of productivity can be achieved in the abovementioned continuously operating diving systems, but there is the problem that, in particular, complicatedly shaped diving articles, for example the surgical and examination gloves mentioned at the beginning, especially in the finger area, without special lubricants, such as Maize powder or the like dissolved in water, not functional or with the required quality removed.
  • the thin-walled latex film applied to the dipping form has a blunt surface on the outside after the vulcanization process and has almost no lubricant properties.
  • corn powder or corn powder as a release agent or lubricant has the serious disadvantage that this agent is a protein carrier.
  • this agent is a protein carrier.
  • the object is achieved with a device according to claim 1 or 2 and with a method as included in claim 13.
  • a coagulant mixture with a predefined and presettable composition can be used, which is individually mixed from the corresponding components before being added to the coating bath.
  • a coagulant mixture with a predefined and presettable composition can be used, which is individually mixed from the corresponding components before being added to the coating bath.
  • containers with the substances to be mixed formed which have a mixing device and an inlet connection to the coating bath.
  • a method mutual basic idea of the invention is starting immediately subsequent to the vulcanization step, carried out by a known dipping process, the post-treatment within 'of the process cycle by immersing the dip molding provided with the vulcanized coating film in a post-treatment bath, wherein the aftertreatment bath is heated and contains additives .
  • the additives to be added to the aftertreatment bath are emulsified and / or dissolved in a fluid, preferably water.
  • the intermediate-dried coating is placed in a release agent pretreatment bath at a preferred temperature of 60 to 65 ° C. and remains there for between 12 s and 2 minutes.
  • a further improvement is obtained if the intermediate-dried coating cover is subjected to a heated cleaning agent before being introduced into the release agent pretreatment bath.
  • water bath is supplied. The temperature of the cleaning water bath is essentially 60 ° C.
  • the diving article is fully vulcanized before being introduced into the aftertreatment bath, the aftertreatment bath having a temperature of not higher than 65 ° C. in order to avoid the (re) release of proteins or their transport to the glove surface.
  • the coagulant coating bath has an increased predetermined temperature compared to the known one, which is in the range between 50 ° C. and 65 ° C. in order to initiate the vulcanization.
  • partial vulcanization is already stimulated in the coating bath, the vulcanization taking place at a temperature of at most 100 ° C.
  • the "for the post-treatment bath employed additives consist according to the invention of wetting agents, release agents and moisture keitsregulierenden substances.
  • two treatment baths may be provided to be continuously traversed by the dipped goods.
  • a first post-treatment in this case has substantially wetting agent on,
  • Another bath contains release agents In order to achieve a homogeneous distribution of the additives for the aftertreatment baths, these are added to the fluid before it is passed into the aftertreatment bath.
  • a flow through the aftertreatment baths is carried out in countercurrent in order to achieve sufficient addition of fresh fluid / additive mixture on the one hand and to ensure effective removal of contaminated or used mixture on the other hand, so that undesired contamination of the bath is prevented.
  • Add coagulant additives which essentially comprise release agents and vulcanization aids.
  • the wetting agents to be used for the aftertreatment bath or baths are selected from a group comprising surfactants, soaps and metal soaps.
  • the release agents are surfactants, soaps or metal soaps or
  • Glycerin glycols, polyglycols, alcohols, polyalcohols, fatty acid derivatives and / or modified fatty acid derivatives.
  • glycerol As moisture-regulating substances according to the invention, glycerol, glycols, polyglycols, alcohols, polyalcohols,
  • Fatty acid derivatives, modified fatty acid derivatives and water repellents are used.
  • 1 shows a schematic view of an apparatus for producing powder-free, low-protein diving articles
  • Fig. 2 is a schematic "view of a further exemplary form of the invention.
  • Fig. 4 is a view of an embodiment of the embodiment described in Fig. 3.
  • Fig. 5 shows another embodiment with pretreatment and post-treatment baths.
  • a coating bath 1 shows a first embodiment of the device.
  • a coating bath 1 a first heated post-treatment bath 2, a second post-treatment bath 3, a drip-off device 4, a drying device 5 in the manner of a fan or the like and a stripper 6 are assumed.
  • the dipping forms pass through the individual stations in the order presented.
  • the dip molds in the coating bath 1 are wetted by the coagulant, as a result of which a coating coating forms on the dip molds.
  • the immersion molds are preferably suspended in a known manner in a rotatable manner on a chain or belt conveyor and are moved through the coating bath 1 in the longitudinal or moving direction in the immersed state.
  • the coating bath 1 has a temperature which is in the range from 50 ° C. to 65 ° C., preferably 60 ° C.
  • the coating bath thus has a temperature which is higher than that previously used, as a result of which partial curing of the coating coating is already excited in the bath 1. That is, the formation of the coating coating is promoted in such a way that the crosslinking of the latex components by the " increased temperature is accelerated. In this way it is achieved that components of the coagulant which are not capable of crosslinking or only slightly crosslinkable are incorporated into the coating coating without an excessively long residence time of the dipping forms in the coating bath 1 being necessary.
  • the coagulant constituents are additives or bath additives for improving the surface quality of the coating coating.
  • the bath additives are essentially long-chain, saturated and / or unsaturated molecules which can be embedded in a cross-linked latex structure.
  • a first heated water aftertreatment bath 2 is provided.
  • the baths are in the immediate vicinity, so that the coating or surface film on the immersion molds is prevented from cooling and the vulcanization breaking off prematurely.
  • This first heated post-treatment bath 2 has a temperature of up to 60 ° C., this temperature being generated and maintained by means of a conventional heating and thermostatting device.
  • This post-treatment bath 2 heated to approximately 60 ° C., has the purpose of cleaning the surface film and washing off residues, in particular also adhering proteins.
  • several water aftertreatment baths 2 can be provided in order to optimize the cleaning.
  • 3 additives are added to a second post-treatment bath, which consist of wetting agents, release agents and moisture-regulating substances.
  • a second, further heated aftertreatment bath 3 is provided following the first heated water aftertreatment bath 2, in which case the first heated aftertreatment bath 2 also contains wetting agents and the second aftertreatment lungsbad contains 3 release agents.
  • This bath 3 is used for " release agent wetting of the coating coating.
  • the temperature of this second aftertreatment bath 3 is set to the temperature value mentioned essentially of 60 ° C. in order to prevent flocculation of the release agent or agents.
  • the aftertreatment baths 2, 3 are designed in such a way that the immersion forms are guided through the aftertreatment baths 2, 3 counter to the direction of flow, ie. H.
  • the outlet of the aftertreatment bath is at the end of the immersion forms and the inlet of the aftertreatment bath is at the end of the aftertreatment bath at which the immersion forms leave the bath.
  • the bath fluid is used in the best possible way and largely protected from contamination.
  • the aftertreatment bath (s) 2, 3 are arranged and adapted such that the dwell time of the immersion molds in the bath (s) 2, 3 is between approximately 10 seconds and two minutes.
  • the dipping forms pass through a post-treatment bath 2, 3 in a straight line or, if a longer dwell time of the dipping forms is desired, in a meandering form, the main direction of movement being maintained.
  • a drip device 4 with a collecting trough is arranged in order to prevent the soil from being contaminated with the aftertreatment fluid and to pre-dry the diving articles before they are completely freed of water in a drying device 5 become.
  • a fan is preferably used in the drying device 5, to which a warm air blower can optionally be connected.
  • the diving articles are withdrawn from the diving molds by means of a scraper 6 and turned over in order to be subsequently packaged.
  • a mixing device 8 provided with a plurality of containers 9a, 9b, 9c, is connected to 9x with the substances to be mixed via pipelines.
  • Each of these containers 9a, 9b, 9c, to 9x each has a refill opening and a drain pipe and can optionally have a fill level indicator.
  • the drain pipe is equipped with a metering valve which is either manually operable or which is designed as an automatic valve which can be controlled by an electrical signal.
  • the drainage tubes of the containers 9a, 9b, 9c, to 9x open into a mixing device 8 which is provided to homogeneously mix one or more additives with a coagulant base substance. This mixture is then passed into the coating bath 1.
  • the containers 9a, 9b, 9c, to 9x with the substances to be mixed are connected on the refill side to larger storage tanks 10a, 10b, 10c to 10x, so that the containers 9a, 9b, 9c, to 9x can be automatically refilled if the level indicator shows a lower level limit and consequently generates a signal that responds to a solenoid valve that opens until the level indicator signals that the optimum level has been reached again.
  • the maintenance personnel only have to check the storage tanks 10a, 10b, 10c to 10x for their filling quantity, according to another
  • a level warning device can also be provided for this purpose, which is activated by a reservoir level indicator device.
  • one or more additives are mixed with the coagulant base substance directly in the coating bath, a stirring device being provided in the coating bath in this embodiment.
  • the additives are piped directly into the Coating bath 1 passed, whereby it is advantageous, 'if the mouths of the feed tubes closely adjacent juxtaposed.
  • an agitator is provided in the coating bath 1 in the immediate vicinity of the feed pipe openings, so that a good mixing of the individual Koagulant joser is ensured.
  • several inlets for coagulants are provided in the longitudinal or in the direction of movement (of the dipping forms) of the coating bath 1, which makes it possible to set a gradual gradation of the ingredients within the coating bath by the coating bath 1 containing coagulant part mixtures at different points of the coating bath 1 are added.
  • the coating bath 1 it is possible to first add a somewhat higher proportion of release agent to the coating bath 1, so that the surface film formed on the immersion mold adheres somewhat less firmly to the immersion mold.
  • a separate metering valve is advantageously provided for each feed, so that the addition of coagulant can be individually adjusted
  • mixing devices 8a, 8b to 8y are additionally provided in front of the metering valves for better mixing of the different individual coagulant feed streams. In this way, it is possible to adjust the composition of the coagulant even during ongoing production and to delay the exhaustion of the coating bath.
  • FIG. 4 shows an extended variant of the embodiment according to FIG. 3.
  • the containers 9a, 9b, 9c to 9x of the respective mixing devices 8a, 8b to 8y are fed from the same storage containers 10a, 10b, 10c to 10x, whereby the pipes to the respective containers 9a, 9b, 9c to 9x with at least one each
  • Dosing valve can be shut off in order to be able to produce individual coagulant part mixtures.
  • Fig. 5 illustrated embodiment both a pre-treatment is carried out and a coating of the coating.
  • the intermediate drying coating is fed to a pretreatment water bath 102. Following this cleaning bath, the coating coating passes into a release agent pretreatment bath 103, which has release agents similar to the second aftertreatment bath.
  • the above-mentioned pretreatment improves the slip properties of the finished product.
  • the combination of pre-treatment and post-treatment results in an overall optimization of the surface properties of latex diving articles without the need for conventional powder bath additives. At the same time, the protein content of the diving articles and their potential allergenic effects is reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour la fabrication d'articles revêtus au trempé, sans talc et à faible teneur protéique, notamment des gants chirurgicaux et d'examen. Selon l'invention, un post-traitement du revêtement d'enduction vulcanisé adhérent sur la pièce moulée est effectué, immédiatement après l'étape de vulcanisation, par immersion des moules à trempage, munis du revêtement d'enduction vulcanisé, dans au moins un bain de post-traitement chauffé contenant des additifs. Ces additifs ajoutés au bain de post-traitement sont émulsionnés et/ou dissous dans un fluide, de préférence de l'eau. On utilise comme additifs des agents mouillants ou des agents de démoulage comportant des tensioactifs, des savons, des savons métalliques, de la glycérine, des glycols, des polyglycols, des alcools, des polyols, des dérivés d'acide gras et/ou des dérivés d'acide gras modifiés.
PCT/EP1998/007076 1997-12-17 1998-11-05 Dispositif et procede pour la fabrication d'articles revetus au trempe, sans talc et a faible teneur proteique, notamment de gants chirurgicaux et d'examen WO1999030888A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU16669/99A AU1666999A (en) 1997-12-17 1998-11-05 Device and method for the production of coated powderless, low protein immersionarticles, especially surgical and examination gloves
EP98961140A EP1039992A1 (fr) 1997-12-17 1998-11-05 Dispositif et procede pour la fabrication d'articles revetus au trempe, sans talc et a faible teneur proteique, notamment de gants chirurgicaux et d'examen

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19756256.6 1997-12-17
DE19756256 1997-12-17
DE19803239A DE19803239C2 (de) 1997-12-17 1998-01-28 Vorrichtung und Verfahren zur Herstellung von puderfreien, proteinarmen Tauchartikeln, insbesondere von Operations- und Untersuchungshandschuhen
DE19803239.0 1998-01-28

Publications (1)

Publication Number Publication Date
WO1999030888A1 true WO1999030888A1 (fr) 1999-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/007076 WO1999030888A1 (fr) 1997-12-17 1998-11-05 Dispositif et procede pour la fabrication d'articles revetus au trempe, sans talc et a faible teneur proteique, notamment de gants chirurgicaux et d'examen

Country Status (3)

Country Link
EP (1) EP1039992A1 (fr)
AU (1) AU1666999A (fr)
WO (1) WO1999030888A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2438930A (en) * 2006-06-07 2007-12-12 C K Europ Ltd Forming a glove by dip-moulding using a mixer

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628059A1 (de) * 1975-06-24 1977-01-27 Sutures Inc Verfahren zur herstellung von gegenstaenden aus gummi mit einem dehnbaren, gleitfaehigen ueberzug sowie hierfuer geeignete ueberzugsstoffe
WO1981000346A1 (fr) * 1979-07-30 1981-02-19 American Hospital Supply Corp Gant de chirurgien et procede sans talc pour sa formation
WO1984002138A1 (fr) * 1982-11-30 1984-06-07 Lrc Products Procede d'enrobage d'articles fabriques en caoutchouc ou polymere
EP0199318A2 (fr) * 1982-09-03 1986-10-29 Lrc Products Limited Produit de trempage en caoutchouc
EP0574160A1 (fr) * 1992-06-10 1993-12-15 Maxxim Medical, Inc. Article flexible en caoutchouc et procédé de fabrication
WO1994020574A2 (fr) * 1993-03-01 1994-09-15 Baxter International Inc. Gants a base de copolymere sequentiel
EP0682062A2 (fr) * 1994-05-13 1995-11-15 Semperit Aktiengesellschaft Holding Procédé pour appliquer une couche de glissement sur un article caoutchouteux flexible
WO1996023643A1 (fr) * 1995-02-02 1996-08-08 Baxter International Inc. Procede de fabrication d'un gant revetu d'une couche de polyurethane
WO1996025278A1 (fr) * 1995-02-14 1996-08-22 Avery Dennison Corporation Revetements d'emulsions acryliques pour articles en caoutchouc
EP0824896A1 (fr) * 1996-08-16 1998-02-25 Semperit Aktiengesellschaft Holding Article en matière plastique souple et/ou en caoutchouc

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628059A1 (de) * 1975-06-24 1977-01-27 Sutures Inc Verfahren zur herstellung von gegenstaenden aus gummi mit einem dehnbaren, gleitfaehigen ueberzug sowie hierfuer geeignete ueberzugsstoffe
WO1981000346A1 (fr) * 1979-07-30 1981-02-19 American Hospital Supply Corp Gant de chirurgien et procede sans talc pour sa formation
EP0199318A2 (fr) * 1982-09-03 1986-10-29 Lrc Products Limited Produit de trempage en caoutchouc
WO1984002138A1 (fr) * 1982-11-30 1984-06-07 Lrc Products Procede d'enrobage d'articles fabriques en caoutchouc ou polymere
EP0574160A1 (fr) * 1992-06-10 1993-12-15 Maxxim Medical, Inc. Article flexible en caoutchouc et procédé de fabrication
WO1994020574A2 (fr) * 1993-03-01 1994-09-15 Baxter International Inc. Gants a base de copolymere sequentiel
EP0682062A2 (fr) * 1994-05-13 1995-11-15 Semperit Aktiengesellschaft Holding Procédé pour appliquer une couche de glissement sur un article caoutchouteux flexible
WO1996023643A1 (fr) * 1995-02-02 1996-08-08 Baxter International Inc. Procede de fabrication d'un gant revetu d'une couche de polyurethane
WO1996025278A1 (fr) * 1995-02-14 1996-08-22 Avery Dennison Corporation Revetements d'emulsions acryliques pour articles en caoutchouc
EP0824896A1 (fr) * 1996-08-16 1998-02-25 Semperit Aktiengesellschaft Holding Article en matière plastique souple et/ou en caoutchouc

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2438930A (en) * 2006-06-07 2007-12-12 C K Europ Ltd Forming a glove by dip-moulding using a mixer
GB2438930B (en) * 2006-06-07 2011-04-13 C K Europ Ltd Apparatus and method for manufacturing a glove containing electro-magnetically detectable particles

Also Published As

Publication number Publication date
EP1039992A1 (fr) 2000-10-04
AU1666999A (en) 1999-07-05

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