WO2001076854A1 - Corps composite multicouche constitue de cuir et de matieres thermoplastiques - Google Patents

Corps composite multicouche constitue de cuir et de matieres thermoplastiques Download PDF

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Publication number
WO2001076854A1
WO2001076854A1 PCT/EP2001/003780 EP0103780W WO0176854A1 WO 2001076854 A1 WO2001076854 A1 WO 2001076854A1 EP 0103780 W EP0103780 W EP 0103780W WO 0176854 A1 WO0176854 A1 WO 0176854A1
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WIPO (PCT)
Prior art keywords
leather
polymer
layer
acting
component
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Application number
PCT/EP2001/003780
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German (de)
English (en)
Inventor
Stephan Hüffer
Joachim Rösch
Georg Igl
Jürgen Bartl
Original Assignee
Basf Aktiengesellschaft
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Publication date
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Priority to AU2001256249A priority Critical patent/AU2001256249A1/en
Publication of WO2001076854A1 publication Critical patent/WO2001076854A1/fr

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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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/08—Leather
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B2037/0092—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding in which absence of adhesives is explicitly presented as an advantage
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/08—Natural leather
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/06—Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners

Definitions

  • the invention relates to a method for producing a multilayer, in particular large-area composite body comprising a layer of leather, a subsequent to one side of the layer of leather layer of acting as the soft component first polymer and a join on this ⁇ layer of a second polymers acting as a hard component, and a multilayer composite body obtainable by the process according to the invention.
  • the preformed molded parts such as door linings, dashboards, center consoles, panels or handles are glued with suitably cut and possibly preformed leather structures.
  • the leather must either be sewn in shape or deep-drawn separately in a separate operation.
  • Such a lamination of molded parts is difficult to automate and very expensive due to the high proportion of manual work.
  • the cladding methods that have been customary up to now only lead to unsatisfactory results. For example, emissions of solvents and residual monomers from the adhesive systems have to be accepted.
  • the linings are exposed to very extreme fluctuations in temperature or humidity, so that the leather lining can warp due to fading.
  • only selected first-quality grain leather is suitable for the hitherto customary cladding process.
  • the impression that is created when touching is also important.
  • the surface should feel pleasant, ie have a "soft touch”.
  • the leather was first covered with a layer of foam for this purpose in a separate step.
  • the composite obtained in this way was then bonded to the substrate, for example a molded piece made of hard plastic.
  • solvent-based adhesives Material systems, dispersion adhesives or two-component reactive resin systems are used, so that inevitable emissions of solvent and residual monomers have to be accepted.
  • DE-OS 2144371 describes a method for preheating leather in an HF field.
  • Carrier layer with PVC or PUR layers with the use of an adhesive that can be reactivated by heat and possibly contains blowing agents in a high-frequency press with simultaneous embossing in the same operation.
  • DE 19752058 describes a method for back-foaming leather fittings having a lap seam.
  • a leather molding is placed with its front side on the mold half of a suitable tool and then the plastic material is applied to the rear of the leather molding with at least slight pressure development.
  • the step-like height difference to be found in the area of the lap seam between the leather section above and the leather section below is compensated for by a transition piece inserted between the leather front and the mold half. No further details are given on the process conditions for the back injection of the leather with the plastic material.
  • EP 033 718 3 B1 describes a method for shaping natural leather, in particular real leather linings for molded parts.
  • a polyurethane barrier layer is pressed into the underside of the leather, which is reactivated by heating.
  • the viscosity and amount of the polyurethane layer applied to the underside before the pressing process are matched to one another in such a way that the thickness of the barrier layer bears 35% to 65% of the thickness of the leather layer.
  • a molded part is then foamed.
  • the Back has a layer which is designed as a foam coating.
  • the layer is produced by applying a liquid plastic material and then solidifying it by withdrawing liquid. In this way, a leather with a "soft touch" is to be provided with a low basis weight.
  • DE 198 151 115 AI describes a leather-clad interior part and a method for gluing a real leather layer to a substrate.
  • the leather-clad interior part for vehicles has a rigid molded carrier part or a flexible spacer pad part on which a real leather layer is arranged by means of an adhesive connection layer.
  • the adhesive connection layer consists of a flat carrier structure and a heat-reactive hot melt adhesive pre-dosed on it. To produce the interior fittings, the individual layers are arranged on top of one another and briefly below
  • DE 198 180 34 describes a device for producing foam-backed leather parts, in particular leather trim parts for the interior of vehicles.
  • a leather part is inserted into a tool having an upper form and a lower form, the tool is closed and the back of the leather part is foamed in accordance with the tool form.
  • Several such tools are installed on a rotary table system, each tool passing through at least the following stations in the course of the rotary movement of the rotary table: an insertion station, a masking station, a foam insertion station, a curing station and a removal station.
  • EP 0 199 708 A2 describes a method for producing at least two-layer articles.
  • a leather strip is inserted into an injection mold and back-injected with a thermoplastic rubber.
  • the temperature of the plastic in the screw vestibule is about 250 ° C
  • the injection pressure is 100 bar.
  • these tests have only been carried out on test pieces of very small size, for example watch straps. Implementation in large-scale production of large-area leather composite components, however, has so far failed.
  • CD u ⁇ > (HO u ⁇ D dp ⁇ op ⁇ J od CD od JQ) d ⁇ ; d) H ⁇ ⁇ > CD PP d O -H CD cd w> c ⁇ p X) ⁇ 0, t ⁇ e ⁇ ⁇ 0) Xl & cu MX) CD c ⁇ X) dd) 4H d -H d t ⁇ ; CD t ⁇ ⁇ d co ⁇ ) VH ⁇ ⁇ -id) ⁇ 3 Xl rö Xl ü d,. N d M c ⁇ d Xl d ⁇ pp rd ⁇ p xi
  • ⁇ xl o rö w M u c ⁇ D> l U d) a ⁇ o X o xi o cd 4H
  • the temperature-controlled mold surface of the tool is tempered to a temperature of more than 80 ° C.
  • the thermal load on the leather increases greatly, so that an increasing destruction of the leather structure can be observed, which leads to unacceptable losses in the quality of the molded part produced leads.
  • the cycle times during the production of the molded parts increase significantly since the plastic is solidified at a lower speed because of the lower temperature difference between the injected plastic and the tempered molding surface.
  • thermosetting mold surface of the tool is kept in the range of 50-60 ° C.
  • high-pressure back injection at high temperatures for example at a temperature of more than 100 ° C., preferably in the range of 180-280 ° C., is particularly preferred possible in the range of 200 to 250 ° C without the leather being affected, not even in continuous operation.
  • the tempering times can even be in the range of minutes.
  • Thin wall injection molding applications can also be carried out with the described method.
  • Metallsalzgegerbte for example, chromium, aluminum
  • metal salt-free leather as well as methods for their manufacture are found in "The Leather", Volume 43 (1992), page 283 et seq., Wrote in detail be ⁇ .
  • Untreated or partially treated as well as treated leather can be used.
  • the process chemicals and dyes are usually selected so that they can withstand the pressure and the thermal conditions of the back-injection process.
  • the fatliquors used in the wet-end area are preferably fixed in the collagen braid in such a way that none are used in the rear molding
  • the tanning agents used in the pre-tanning and post-tanning are generally chosen so that good fiber separation takes place and the leathers have good light, heat and heat resistance. This can be achieved primarily with glutardialdehyde, alone or in combination with synthetic tanning agents based on dihydroxydiphenyl sulfone. Regardless of the tanning agent chosen, the leather obtained by the wet-end process advantageously has a sufficiently high shrinking temperature of at least 70 ° C. when wet.
  • the thickness of the leather used is generally independent of the shape and application of the leather component and can vary in the range from 0.4 to 3.0 mm, with a thickness in the range from 0.4 to 2.0 mm being preferred, as a rule 0.8 to 2.0 mm and in particular 1.2 to 1.8 mm meets most requirements.
  • the amount of pressure with which the connection between the leather layer and the soft component is established is limited only by the technical boundary conditions of the tool used.
  • a permanent bond between leather and polymer is achieved from pressures of 50 bar.
  • Very good results are achieved at pressures of more than 100 bar, in particular more than 180 bar.
  • Rmaturenbrettern A is also working with much higher pressures, for example, 1000 bar.
  • the mold internal pressure, measured in the vicinity of the sprue, is preferably at least 50 bar, particularly preferably at least 100 bar and in particular at least 180 bar.
  • the processing temperature is selected depending on the polymer used.
  • Advantageously for a good connection between the leather and the soft component is mers high flowability of the poly ⁇ .
  • the melt flow rate (MFR) 230 / 2.16> 5 g / 10 min is preferably chosen, preferably between 10 to 50 g / 10 min.
  • the melt flow rate (MFR) is determined according to ISO 1133 at 230 ° C and under a weight of 2.16 kg.
  • a low content of wetting agents in the polymer such as glycerol monostearate, is advantageous for good adhesion. Levels of less than 5000 ppm of wetting agent have been found to be favorable.
  • Thermoplastic elastomers are used as the first polymer, which acts as a soft component.
  • Thermoplastic elastomers TPE are not characterized by their chemical composition, but rather by their material states.
  • Suitable thermoplastic elastomers are generally distinguished by the fact that they simultaneously have soft and elastic segments with a low glass transition temperature and hard, crystallizable segments with low ductility, high glass transition temperature and a tendency to form associations.
  • the hard and soft segments which are not compatible with one another, are in non-penetrating phases.
  • Hard and soft segments can be components of a single polymer or in the form of a mixture of elastomers and thermoplastics in a micro-heterogeneous phase distribution.
  • thermodynamically incompatible phases can be in the form of tri- or multi-block copolymers in the same macromolecule or in the form of elastomer blends. Afterwards, incompatible phases of hard, meltable and soft, elastic components are connected. After an extension of 100% and more, TPE return to their initial position as spontaneously as possible and without any significant extension. All known thermoplastic elastomers can be used as a soft component. Are particularly suitable
  • Styrene oligoblock copolymers such as styrene-butadiene-styrene, styrene-isoprene-styrene or styrene-ethene-butadiene-styrene block co - polymers, for example the commercial products Kraton ® D, Cariflex ® TR and Kraton ® G, thermoplastic elastomers based on olefins (TPE-O) such as mixtures of EPM or EPDM rubbers with crystalline polyolefins, eg polypropylene, eg the commercial product Ferrolene ® (Ferro), thermoplastic polyurethanes (TPE-U), eg the Commercial products Desmopan ® (Bayer AG) and Estane ® (Goodrich), copolymer types (TPE-E) such as copolymeric polyether esters, e.g.
  • TPE-S Styrene
  • Hytrel ® DuPont
  • copolyamide types such as polyether block amides, eg the commercial product Pebax ® (Atochem).
  • TPE-A copolyamide types
  • polyether block amides eg the commercial product Pebax ® (Atochem).
  • thermoplastic elastomers can be used as thermoplastic plastic ⁇ natural, nitrile, fluorine and silicone rubber.
  • thermoplastic elastomers can be found e.g. in Ullmann's Encyclopedia of Industrial Chemistry, Vol. A26, pp. 633-664, VCH Verlagsgesellschaft, 1995, Weinheim.
  • ABS polymers are particularly suitable (these include impact-modified styrene / acrylonitrile polymers in which graft copolymers of styrene and acrylonitrile on polybutadiene rubbers are present in a copolymer matrix of styrene and acrylonitrile), ASA polymers, SAN polymers, mixtures of Poly (meth) acrylates and SAN polymers that are impact modified with polyacrylate rubbers (e.g. Terlux ® ' BASF AG), polypropylene, polyamides, polybutylene terephthalate, polyethylene, thermoplastic polyurethanes, polycarbonate or their mixtures, e.g.
  • PPE / HIPS (high impact polystyrene) -Blends e.g. commercially available under the brand Luranyl ® (BASF AG).
  • Preferred polymer blends are based on ASA / PC, ABS / PC, PBT / ASA, PBT / ABS and PBT / PC blends.
  • the second polymer used as the hard component in the process according to the invention can also contain recyclates from these thermoplastic polymers or consist completely or almost completely of the recyclate.
  • the polybutylene terephthalate preferably used is a clearlymo ⁇ lekulares esterification of terephthalic acid with Butylengly- col kg with a melt flow rate (MFR) according to ISO 1133, at 230 ° C and under a weight of 2.16, of 5 to 50 g / 10 min, insbeson - others from 5 to 30 g / 10 min.
  • Suitable copolymers of styrene are, in particular, copolymers with up to 45% by weight, preferably with up to 20% by weight, of copolymerized acylnitirile.
  • Such copolymers of styrene and acrylonitrile (SAN) have a melt flow rate (MFR), according to ISO 1133, at 230 ° C. and under a weight of 2.16 kg of 1 to 25 g / 10 min, in particular 4 to 20 g / 10 min on.
  • Further copolymers of styrene which are likewise preferably used, contain up to 35% by weight, in particular up to 20% by weight of polymerized acrylonitrile, up to 35% by weight, in particular up to 30% by weight of polymerized butadiene.
  • the melt flow rate of such copolymers of styrene, acrylonitrile and butadiene (ABS) according to ISO 1133, at 230 ° C. and under a weight of 2.16 kg, is in the range from 1 to 40 g / 10 min, in particular in the range from 2 to 30 g / 10 min.
  • ASA polymers are generally understood to mean impact-modified styrene / acrylonitrile polymers in which graft copolymers of vinylaromatic compounds, in particular styrene, and vinyl cyanides, in particular acrylonitrile, on polyalkylacrylate rubbers are present in a copolymer matrix of, in particular, styrene and acrylonitrile.
  • Commercially ASA polymers for example, are given under the name Luran ® S (BASF AG.) - borrowed.
  • Suitable polycarbonates are known per se. Particularly preferred polycarbonates are those based on bisphenol A or bisphenol A together with up to 80 mol% of further aromatic dihydroxy compounds. Are commercially available, for example, the polycarbonates Makrolon ® (Messrs. Bayer AG) and Lexan ® (Messrs. GE Plastics BV). There are also copolycarbonates based on bisphenol A and, for example, bis- (3,5-dimethyl-4-hydroxyphenyl) sulfone or 1,1-di- (4-hydroxyphenyl) -3, 3,5-trimethyl-cyclohexyl, which are characterized by a high heat resistance, in question.
  • copolycarbonate is commercially available under the trade name Apec ® HT (Messrs. Bayer AG).
  • Apec ® HT Mossrs. Bayer AG
  • the polycarbonates can be used both as regrind and in granular form.
  • polycarbonates are usually present in amounts of 1 to 80, preferably 9 to 50% by weight and particularly preferably 15 to 45% by weight, based on the respective mixture.
  • the use of polycarbonates leads, among other things, to higher thermal stability and improved crack resistance of the composite layer films.
  • Polyolefins such as polyethylene or polypropylene are also used in particular as materials for the hard component, the latter being preferably used.
  • poly propylene ⁇ should there be pylens understood both homopolymers and copolymers of production.
  • Copolymers of propylene contain minor amounts of monomers copolymerizable with propylene, for example C 2 to C 8 -alk-1-enes, such as, inter alia, ethylene, but-1-ene, pent-1-ene or hex-1-ene. Two or more different comonomers can also be used.
  • Particularly suitable carriers include homopolymers of propylene or copolymers of propylene with up to 50% by weight of other 1-alkenes polymerized in with up to 8 carbon atoms.
  • the copolymers of propylene are statistical copolymers or block or impact copolymers. If the copolymers of propylene have a statistical structure, they generally contain up to 15% by weight, preferably up to 6% by weight, of other 1-alkenes with up to 8 C atoms, in particular ethylene, 1-butene or a mixture from ethylene and 1-butene.
  • Block or impact copolymers of propylene are polymers in which, in the first stage, a propylene homopolymer or a random copolymer of propylene is used with up to 15% by weight, preferably up to 6% by weight, of other 1-alkenes produces up to 8 carbon atoms and then in the second stage a propylene-ethylene copolymer with ethylene contents of 15 to 80% by weight, the propylene-ethylene copolymer additionally containing further C to Cs-alk-enes may contain, polymerized. As a rule, so much of the propylene-ethylene polymer is polymerized in that the copolymer produced in the second stage has a proportion of 3 to 60% by weight in the end product.
  • the material of the hard component can, based on the total weight of the carrier, contain 1 to 60, preferably 5 to 50, particularly preferably 10 to 40% by weight of reinforcing fillers, such as, for example, wood flour, amorphous silica, magnesium carbonate, Magnesium hydroxide, chalk, powdered quartz, mica, mica, bentonite, talc, especially with an average grain size in the range of 0.1 to 10 ⁇ m measured according to DIN 66115, calcium carbonate, barium sulfate, glass balls, feldspar or in particular calcium silicates such as wollastonite and kaolin , Fibers, which in the present case also include platelet-shaped products, are also suitable.
  • reinforcing fillers such as, for example, wood flour, amorphous silica, magnesium carbonate, Magnesium hydroxide, chalk, powdered quartz, mica, mica, bentonite, talc, especially with an average grain size in the range of 0.1 to 10 ⁇ m measured according
  • fibrous fillers are carbon, aramid, steel or glass fibers, aluminum flakes, cut glass or glass silk rovings.
  • Particularly preferably glass fiber reinforced ⁇ are fibers.
  • Natural fibers such as flax, hemp, jute, sisal, ramie or carnaf can also be used as fibers.
  • the glass fibers used can be made of E, A or C glass and are preferably equipped with a size and / or an adhesion promoter. Both continuous fibers (rovings) and chopped glass fibers (staple) can be used.
  • Mixtures of fibers and / or particulate fillers can also be used.
  • the usual additives such as light, UV and heat stabilizers, carbon blacks, lubricants, waxes, effect colorants, or flame retardants and the like can be added to the material of the hard component in the usual and required amounts.
  • the first polymer and the second polymer are molded onto the leather in a common working step. This creates a particularly intensive connection between the n CU od),, ⁇ rH
  • CD cu -rH ß d P -rl t ⁇ ⁇ -rl CU ua X) -rl XX dd CD oo -rl 4-1 XJ 4-1 ⁇ XX c ⁇ cQ 4-1 I ⁇ 44 CD 4-1 CU 0 ß ⁇ ß rH X 4-1 CD 4J CD d> o ⁇ CU CQ ao CD 'C ⁇ H CQ ß VH CQ X -H
  • repaired spot is practically no longer most in this case erta ⁇ . This is also supported by the shrinkage of the soft component that does not occur or only occurs to a small extent during cooling. There are no recesses in the repaired areas. After appropriate pigmentation, the patched area can no longer be seen in relation to the surrounding leather surface, even in the case of oblique light.
  • the inventive method a processing of inferior leather is possible without a loss in the optical ⁇ 's appearance or the properties when touching be hingenom ⁇ men must.
  • the method according to the invention can therefore also be used, for example in motor vehicles in the lower price segment, to offer leather interior fittings at low prices, while at the same time a higher quality impression of the interior fittings is achieved by covering with leather.
  • Another advantage is that there is less leather waste, since areas of the leather can also be processed with low quality.
  • the leather By cooling the mold surface of the tool, the hydrothermal load on the leather is low. For processing, it has proven to be beneficial if the leather is as dry as possible.
  • the leather preferably has a moisture content of less than 20% by weight.
  • the tools customary in plastics technology for example injection molding tools for injection molding, can be used as tools in the process according to the invention. It is essential that sufficient heat dissipation can be ensured on the leather side of the composite body.
  • the leather layer is either pre-shaped three-dimensionally directly using a deep-drawing process and then back-injected with the soft component or the soft and hard component in an injection mold, or the leather is deep-drawn in the injection mold by the inflowing polymer melt.
  • the carrier and leather are connected by extrusion.
  • the polymer particularly preferably a two-phase arrangement of soft and hard components, is preferably heated in an extruder to a temperature of at least 100 ° C.
  • the leather is then fed to the polymer or the multiphase polymer composite via tempered calender or embossing rolls, and in this way the polymer and leather are bonded to one another.
  • the heated thermoplastic polymer is then gnet ejected through an appropriately shaped broadband nozzle.
  • the three-dimensional shaping of the composite of leather, soft and hard components can take place within the tool, that is, the calender or embossing roll.
  • heated structures on the side of the polymer of the composite body to the required high temperature ⁇ while ge ⁇ is cooled on the leather side of the composite body.
  • the composite bodies which can be produced using the method according to the invention have extremely favorable properties.
  • Subject OF INVENTION is ⁇ dung therefore also provides a multilayer composite body with a sandwiching superposed layer of leather, a subsequent to the leather layer of acting as the soft component first polymer and an adjoining the soft component layer of acting as hard component second polymer and optionally further layers, the layer of the first polymer acting as a soft component being bonded to the leather layer without adhesive, in particular the leather being permeated on one side, preferably on the meat side, by the first polymer.
  • thermoplastic elastomer penetrated into the leather layer irreversibly connects the leather layer and the soft component.
  • the leather layer can only be separated from the underlying carrier by destroying the leather structure.
  • no further material is required as an adhesive for the connection of the leather layer and the soft component.
  • the absence of an adhesive layer between the leather and soft components is therefore characteristic of the three-dimensional composite body according to the invention.
  • the connection between soft component and hard component is preferably also made without adhesive.
  • the depth of penetration of the first polymer into the leather is 5 to 40%, preferably 10 to 30%, of the thickness of the leather layer.
  • the required depth of penetration depends on the leather thickness and the requirements for mechanical resistance.
  • the composite bodies according to the invention can be used in a large number of applications.
  • Another application is in ⁇ play as the furniture industry.
  • An embodiment of the composite body as a backrest, seat surface or armrest of seating furniture is conceivable.
  • the invention can be used far beyond the application examples mentioned. It offers particular advantages if, in addition to the optical properties, the feeling that it is produced when the leather surface is touched is also important.
  • a piece of leather (FOC leather "wet white” from BASF, article no. Hill) with an edge length of 15 x 30 cm and a thickness of 1.2 mm was placed in an injection mold in such a way that the grain side on a with a relief-provided molded surface of the tool.
  • the mold surface was tempered to a temperature of approx. 60 ° C.
  • the molding compositions of the components which act as soft components (TPE-U) and the components which act as hard components (acrylonitrile-butadiene-styrene copolymer) were subjected to a pressure unit under a pressure of 700 bar at a temperature of 250 ° C. injected together.
  • the highly viscous hard component forms as the core and the low-viscosity soft component as the skin component.
  • the molding was cooled to 40 ° C. over a period of one minute. Then the injection mold was opened and the resulting three-dimensional composite body was removed.
  • the shaped body produced in Example 1 was completely immersed in distilled water heated to 20 ° C. for two hours in each case. The molded body was then removed from the water and the surface was dried off with absorbent paper. net and then the molded body dried in a drying cabinet at 120 ° C. for 10 h. This treatment was repeated twice. The molded body was optically examined for changes. There were no changes in the leather surface. No detachments can be observed. A check for warpage was carried out by inserting the molded body into a template. No change in the shape of the shaped body could be determined.
  • the shaped body produced in Example 1 was stored in a climatic chamber for four days at 10 ° C. and a relative atmospheric humidity of 98%.
  • the sample piece was removed and transferred to a further climatic chamber and stored there for another four days at 120 ° C. and a relative air humidity of 15%.
  • the sample was removed and visually examined for changes. It showed no detachment of the leather layer.
  • a check of the shaped body with the aid of a template showed that it had not changed its shape.
  • Example 2 The molded body produced in Example 1 was clamped and then the leather layer was pulled off with a force acting perpendicular to the leather surface of the sample. At a force of 20 N, the leather layer was detached, destroying the leather structure.
  • Thin longitudinal sections were made through the shaped body and measured under the microscope.
  • the depth of penetration of the polymer into the leather layer was determined to be 200 mm (20%).

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de production d'un corps composite multicouche, qui comprend une couche de cuir, une couche constituée d'un premier polymère, en tant que composant mou, liée à un premier côté de la couche de cuir, et une couche constituée d'un second polymère, en tant que composant dur, liée à la dernière couche. Le cuir et le premier polymère, en tant que composant mou, sont liés au moyen d'un outil présentant une surface de façonnage sur laquelle vient reposer le cuir, à une pression d'au moins 50 bars, de préférence de plus de 100 bars, en particulier de plus de 180 bars, et à une température supérieure à 100 °C, de préférence de 180 à 280 °C, en particulier de 200 à 250 °C. La surface de façonnage de l'outil en contact avec le cuir est portée à la température désirée, et le second polymère, en tant que composant dur, est moulé sur le premier polymère. L'invention concerne en outre un corps composite obtenu selon le procédé présenté. Le corps composite selon l'invention se caractérise par une stabilité et une robustesse très élevées et confère un toucher doux au cuir.
PCT/EP2001/003780 2000-04-07 2001-04-03 Corps composite multicouche constitue de cuir et de matieres thermoplastiques WO2001076854A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001256249A AU2001256249A1 (en) 2000-04-07 2001-04-03 Multilayer composite body from leather and thermoplastics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000117486 DE10017486A1 (de) 2000-04-07 2000-04-07 Mehrschichtiger Verbundkörper von Leder und Thermoplasten
DE10017486.8 2000-04-07

Publications (1)

Publication Number Publication Date
WO2001076854A1 true WO2001076854A1 (fr) 2001-10-18

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PCT/EP2001/003780 WO2001076854A1 (fr) 2000-04-07 2001-04-03 Corps composite multicouche constitue de cuir et de matieres thermoplastiques

Country Status (3)

Country Link
AU (1) AU2001256249A1 (fr)
DE (1) DE10017486A1 (fr)
WO (1) WO2001076854A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065639A3 (fr) * 2003-01-22 2007-12-13 Panolam Ind Int Inc Lamine en cuir souple
US8262827B2 (en) 2003-01-22 2012-09-11 Panolam Industries International, Inc. Leather laminated decorative panel

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* Cited by examiner, † Cited by third party
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US20040076816A1 (en) * 2002-10-22 2004-04-22 Trw Vehicle Safety Systems Inc. Wrapped steering wheel free of adhesive interface
DE10361230A1 (de) * 2003-12-24 2005-07-28 Ticona Gmbh Verbundkörper, Verfahren zu dessen Herstellung und dessen Verwendung
DE10361190A1 (de) 2003-12-24 2005-07-28 Ticona Gmbh Verbundkörper, Verfahren zu dessen Herstellung und dessen Verwendung
DE102004047200B4 (de) 2004-09-29 2010-06-02 Ticona Gmbh Verbundkörper aus Polyacetal und thermoplastischem Vulkanisat-Elastomer
DE102011056933A1 (de) * 2011-12-22 2013-06-27 Bayerische Motoren Werke Aktiengesellschaft Interieurbauteil für ein Kraftfahrzeug
WO2013190839A1 (fr) 2012-06-20 2013-12-27 日泉化学株式会社 Film de résine et feuille de bois de placage tranché utilisant celui-ci et élément intérieur d'automobile
WO2015124660A1 (fr) * 2014-02-19 2015-08-27 Johnson Controls Interiors Gmbh & Co. Kg Corps moulés multicouches destinés aux équipements intérieurs de véhicules et procédé de fabrication desdits corps moulé

Citations (9)

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Publication number Priority date Publication date Assignee Title
EP0362684A2 (fr) * 1988-09-28 1990-04-11 Helmuth Schmoock Cuir et son procédé de fabrication
EP0199708B1 (fr) * 1985-04-15 1991-11-21 Hirsch Armbänder Gesellschaft m.b.H. Procédé pour la fabrication d'objets ayant au moins deux couches
DE4316438A1 (de) * 1992-10-17 1994-04-21 Riesselmann & Sohn Innenverkleidungsteil
US5409648A (en) * 1991-06-21 1995-04-25 Metraplast H. Jung Gmbh Process for producing multi-layer molded bodies
US5650115A (en) * 1992-08-31 1997-07-22 Plastic Mold Technology Incorporated Method for making molded air bag covers and other articles with integral cover layer of leather
EP0893112A1 (fr) * 1997-07-23 1999-01-27 Globus Berkemann GmbH & Co. KG Support orthopédique
DE19815115A1 (de) * 1998-04-03 1999-10-14 Eldra Kunststofftechnik Gmbh Lederkaschiertes Innenausstattungsteil und Verfahren zur Verklebung einer Echtlederschicht mit einem Substrat
EP1060861A1 (fr) * 1999-06-16 2000-12-20 TARGOR GmbH Méthode de moulage d'un objet tridimensionnel
EP1060877A2 (fr) * 1999-06-16 2000-12-20 TARGOR GmbH Matériau composite stratifié avec une couche intermédiaire en matière thermoplastique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199708B1 (fr) * 1985-04-15 1991-11-21 Hirsch Armbänder Gesellschaft m.b.H. Procédé pour la fabrication d'objets ayant au moins deux couches
EP0362684A2 (fr) * 1988-09-28 1990-04-11 Helmuth Schmoock Cuir et son procédé de fabrication
US5409648A (en) * 1991-06-21 1995-04-25 Metraplast H. Jung Gmbh Process for producing multi-layer molded bodies
US5650115A (en) * 1992-08-31 1997-07-22 Plastic Mold Technology Incorporated Method for making molded air bag covers and other articles with integral cover layer of leather
DE4316438A1 (de) * 1992-10-17 1994-04-21 Riesselmann & Sohn Innenverkleidungsteil
EP0893112A1 (fr) * 1997-07-23 1999-01-27 Globus Berkemann GmbH & Co. KG Support orthopédique
DE19815115A1 (de) * 1998-04-03 1999-10-14 Eldra Kunststofftechnik Gmbh Lederkaschiertes Innenausstattungsteil und Verfahren zur Verklebung einer Echtlederschicht mit einem Substrat
EP1060861A1 (fr) * 1999-06-16 2000-12-20 TARGOR GmbH Méthode de moulage d'un objet tridimensionnel
EP1060877A2 (fr) * 1999-06-16 2000-12-20 TARGOR GmbH Matériau composite stratifié avec une couche intermédiaire en matière thermoplastique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065639A3 (fr) * 2003-01-22 2007-12-13 Panolam Ind Int Inc Lamine en cuir souple
US8262827B2 (en) 2003-01-22 2012-09-11 Panolam Industries International, Inc. Leather laminated decorative panel

Also Published As

Publication number Publication date
DE10017486A1 (de) 2001-10-11
AU2001256249A1 (en) 2001-10-23

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