WO2001020072A1 - Procede pour produire un cuir synthetique - Google Patents

Procede pour produire un cuir synthetique Download PDF

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Publication number
WO2001020072A1
WO2001020072A1 PCT/EP2000/009042 EP0009042W WO0120072A1 WO 2001020072 A1 WO2001020072 A1 WO 2001020072A1 EP 0009042 W EP0009042 W EP 0009042W WO 0120072 A1 WO0120072 A1 WO 0120072A1
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WO
WIPO (PCT)
Prior art keywords
fibers
hot water
nonwoven fabric
soluble fibers
soluble
Prior art date
Application number
PCT/EP2000/009042
Other languages
German (de)
English (en)
Inventor
Kurt Jörder
Dieter Groitzsch
Horst Lorenz
Original Assignee
Firma Carl Freudenberg
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
Application filed by Firma Carl Freudenberg filed Critical Firma Carl Freudenberg
Priority to MXPA02002834A priority Critical patent/MXPA02002834A/es
Priority to KR1020027003530A priority patent/KR20020041440A/ko
Priority to JP2001523436A priority patent/JP2003509596A/ja
Priority to EP00966028A priority patent/EP1216322A1/fr
Priority to BR0014045-7A priority patent/BR0014045A/pt
Priority to CA002385307A priority patent/CA2385307A1/fr
Publication of WO2001020072A1 publication Critical patent/WO2001020072A1/fr

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D04H1/43832—Composite fibres side-by-side
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D04H1/43828—Composite fibres sheath-core
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D04H1/4383—Composite fibres sea-island
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43838—Ultrafine fibres, e.g. microfibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/0052—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by leaching out of a compound, e.g. water soluble salts, fibres or fillers; obtained by freezing or sublimation; obtained by eliminating drops of sublimable fluid

Definitions

  • the invention relates to a method for producing a synthetic leather from a microfiber-containing nonwoven.
  • Synthetic leathers based on nonwovens today are composed almost exclusively of microfibers. It has been shown that homogeneous microfibers as such cannot be processed on cards, or can only be processed at extremely low, extremely low production speeds. Therefore, multicomponent fibers such as matrix fibril fibers or island-in-sea fibers (island-in-sea type) or those with a different distribution of the preferably two-fiber components and with a fiber titer are used, which card without loss of speed to let.
  • the cross sections of such fibers have, for example, an orange structure or a cake or. Hollow cake structure.
  • Such multicomponent fibers conjuggate fibers, multiconstituent fibers
  • the individual fiber segments of the usually two polymers alternate with one another, so that after each segment there are fiber interfaces, e.g. Form polyethylene terephthalate / polyamide 6.
  • These multi-component fibers are separated into isolated, ultra-fine microfibers using different methods. One of the two fiber components is removed, for example, with organic solvents
  • BEST ⁇ TIGÜNSKOPIE dissolves so that the other fiber component insoluble in the organic solvent remains as microfiber.
  • This method is complex, not very environmentally compatible and is associated with a high loss of material and the occurrence of polymer-containing solvents.
  • the used solvent is worked up either by solvent recovery or by energetic use.
  • the bicomponent split fibers are either made up of chemically very different thermoplastics, which do not have high adhesive forces at their interfaces, or which are mixed with chemically similar fiber polymers such as polyolefins with adhesive additives, ie additives that reduce the adhesive forces.
  • a synthetic leather with a soft handle which contains at least on one side a nonwoven layer of meltblown polyethylene terephthalate microfibers with a diameter of 0.1 to 6.0 ⁇ m.
  • the softness is achieved in that the nonwoven fabric is coated with a size of cold water-soluble polyvinyl alcohol before impregnation with polyurethane from organic solvents such as dimethylformamide. After the impregnation and coagulation of the polyurethane solution with water (so-called migration method) and the subsequent washing steps for the purpose of removing the organic solvent, the polyvinyl alcohol is removed from the nonwoven fabric at the same time.
  • the after-treatment of the synthetic leather obtained is carried out in a known manner by grinding, dyeing and brushing.
  • Document US-A 4390566 describes the production of a synthetic leather, in which inter alia split microfibers are used.
  • the microfiber nonwoven is impregnated with a water-soluble sizing solution known as a temporary filler Binder application is washed out again.
  • a water-soluble sizing solution known as a temporary filler Binder application is washed out again.
  • Polyvinyl alcohol (PVA), poly- ⁇ -caprolactone, carboxymethyl cellulose (CMC) or starch are used as temporary water-soluble fillers.
  • the object of the invention is to provide a method which allows the production of a very soft synthetic leather with improved properties. Another object of the invention is to make the manufacture more economical and environmentally friendly.
  • thermoplastic microfibers with a titer of 0.05 to 1.0 dtex and hot water-soluble fibers with a titer of 4 to 6 dtex in a weight ratio of 90:10 to 30:70 a nonwoven fabric with a basis weight of 80 to 1000 g / m 2 are processed and an aqueous polymer dispersion of a viscoelastic substance in a weight ratio of 25:75 to 75:25 from nonwoven fabric to the viscoelastic substance is applied and solidified, with an extraction of the hot water soluble fibers.
  • the method according to the invention is preferably one in which the titer of the thermoplastic microfibers 0.1 to 0.3 dtex, the weight ratio of the microfibers to the hot water-soluble fibers 70:30 to 50:50% by weight, and the weight per unit area of the nonwoven fabric 100 up to 500 g / m 2 and the ratio of the nonwoven fabric to the viscoelastic substance before removal of the hot water-soluble fibers is 35:65 to 65:35% by weight.
  • thermoplastic fibers are split fibers.
  • split fibers made of polyethylene terephthalate / polyamide 6, polyethylene terephthalate / polyamide 6.6, Polyethylene terephthalate / polypropylene or polyethylene terephthalate / polyethylene.
  • Hot water-soluble fibers made of polyvinyl alcohol, poly- ⁇ -caprolactone, carboxymethyl cellulose or starch are preferably used in the process according to the invention.
  • the nonwoven fabric is preferably consolidated and split using high-pressure water jets.
  • an aqueous polymer dispersion of polyurethane, nitrile-butadiene rubber or styrene-butadiene rubber is used as the binder.
  • fillers such as pigments, hydrophobizing agents, hydrophilizing agents, agents for reducing the wettability with alcohols, fats and oils, antistatic agents and / or antimicrobial agents are added to the thermoplastic fibers.
  • post-treatment is carried out by buffing, grinding or greasing.
  • the hot water-soluble fibers are extracted simultaneously with a pull-out dyeing, in particular in autoclaves.
  • the process according to the invention is not only simple, ie it requires fewer process steps, but at the same time it allows the synthetic leather to be produced more cheaply and in an environmentally friendly manner.
  • the method according to the invention makes it possible to dispense with the use of organic solvents for releasing the microfibers and also for applying the binder coagulation.
  • the synthetic leather is produced according to the invention in such a way that a fiber sheet is produced from continuous fibers, staple fibers or short cut fibers with the aid of the known fiber laying techniques.
  • This fiber sheet consists of at least two fiber components, at least one of the fiber components being a bicomponent fiber that can be split with high-pressure water jets.
  • split fibers consist of at least two thermoplastic polymer components, P1 and P2, which are arranged in an alternating sequence in segments around the fiber axis. Both centric and eccentric fiber axis arrangements are possible.
  • the number of segments is between 2 and 30, but is preferably between 4 and 24.
  • the total titer of these so-called pie fibers is between 0.8 and 5.0, preferably between 1.0 and 3.3 dtex.
  • the fiber polymers P1 and P2 are also possible, provided that the fibers are split at least 80% into microfibers under strong mechanical or hydrodynamic forces, such as a high-pressure water jet treatment.
  • the polymer pairs P1 and P2 used are preferably those whose common interface does not exert high adhesive forces on one another.
  • Known P1 / P2 pairs are, for example, polyethylene terephthalate / polyamide 6, polyethylene terephthalate / polyamide 6.6, polyethylene terephthalate / polypropylene and polyethylene terephthalate / polyethylene.
  • P1 / P2 pairs such as, for example, polypropylene and polyethylene or their copolymers
  • release agents which ensure that they can be split.
  • Polyolefins catalyzed with metallocene can also be used as polymer components P1 and / or P2.
  • the fiber polymer components P1 and P2 can be dyed, white-pigmented or provided with agents which impart hydrophilic or hydrophobic properties to the fiber polymer components or a reduced wettability with alcohol, other organic liquids, fats or oils.
  • the fiber polymer components can be mixed with antistatic agents or antimicrobial agents.
  • the hot water solubility of the fiber is a solubility in water under the conditions of the high pressure water jet treatment of less than 5% and a solubility of at least 95% in water at a temperature of approx. 98 ° C. or in pressure vessels at temperatures above 100 ° C understood.
  • Hot water-soluble fibers in the sense of the invention are also those fibers which only go into solution under pressure treatment in an autoclave or are swollen to such an extent that at least 95% of them are removed from the nonwoven fabric by a washing process under these conditions.
  • Preferred hot water-soluble fibers are those made from polyvinyl alcohol or poly- ⁇ -caprolactone.
  • the nonwoven fabric can also contain other fibers, but nonwoven fabrics made from the two types of fibers mentioned are preferred.
  • the weight ratio of split fiber and hot water-soluble fiber is 90:10 to 30:70, preferably 70:30 to 50:50.
  • the hot water soluble fiber can be in a weakly cross-linked form. Fibers that are only one can also be used as hot water-soluble fibers Have a coating of a hot water-soluble polymer, that is, they have a core-shell structure. Fibers with a side-by-side structure consisting of different polymers, only one of which is soluble in hot water, are also suitable. According to the invention, the grit fiber has no hot water-soluble coating.
  • the hot-water-soluble fibers are introduced statistically according to their proportion, for example by carding or the airlaid process or by laying them on an inclined sieve according to the Fourdrinier method.
  • hot water-soluble fibers are blown in laterally with the aid of an air stream into the continuous filaments emerging from the spinnerets and quenched and stretched by a directed air stream before they are deposited on a screen belt, or the addition is made from a separate spinning beam.
  • the split fibers and hot water-soluble fibers used preferably have a crimped structure.
  • the fibers laid down to form a nonwoven sheet are transferred to a dewatering screen and subjected to a high pressure water jet treatment. In a first stage, the fibers are only entangled with a low water jet pressure to form a highly tear-resistant nonwoven.
  • the splitting of the split fiber into microfibers with titers between 0.05 and 1.0 dtex, preferably 0.1 to 0.3 dtex, is then carried out with one or more high-pressure water jet beams.
  • the fineness of the microfibers released can be adjusted by the titer of the split fiber in the unsplit state and the number of segments.
  • at least the last water jet beams are set into an oscillating movement perpendicular to the machine conveying direction.
  • denser sieves can be used, which cause reflection and scattering of the water jets that occur and thereby result in blurring of the water jet alleys.
  • nonwovens with a weight per unit area of 80 to 1000 g / m 2 are obtained preferably 100 to 500 g / m 2 generated.
  • the fleece is preferably additionally mechanically needled before the hydrodynamic treatment.
  • the inventive method is carried out so that after splitting to microfibers max. 3 to 5 wt .-% of the hot water-soluble fibers are removed from the nonwoven fabric by the water jet needling and splitting process.
  • the solidified nonwoven fabric obtained is dried and impregnated in a manner known per se by the dry-in-wet application method with an aqueous binder dispersion. The application can be done by brushing, slapping from one side, or by impregnating a full bath in a foulard.
  • a one-sided application of the binder dispersion can be promoted by applying a vacuum to the opposite side of the nonwoven.
  • the binder is applied in relation to the prefabricated nonwoven, ie before the hot water-soluble fibers are removed in a ratio of 25:75 to 75:25% by weight, preferably 35:65 to 65:35% by weight.
  • Self-crosslinking, reactive groups in the polymer or polymers with crosslinking agents are used as binders. When choosing the polymer dispersions or the crosslinking agents, care must be taken to ensure that the reactive groups in the hot water-soluble fibers either remain uncrosslinked or that the degree of crosslinking is kept so low that the water solubility for removing the portion according to the invention is retained.
  • binders in the sense of the invention Polymer dispersions of polyurethane, nitrile-butadiene rubber and / or styrene-butadiene rubber are used as binders in the sense of the invention.
  • No binders in the sense of the invention are those which smear with sandpaper or on ceramic rollers when buffing or grinding.
  • Known substances such as inorganic white pigments, color pigments, freshener improvers, such as, for example, silicones, cellulose dust, optical brighteners, antistatic agents, bacteriostatics, can be added to the binder. After the binder has been applied, the nonwoven is dried, with thermocoagulation and crosslinking or vulcanization possibly taking place beforehand. The synthetic leather obtained is then advantageously buffed and pre-ground.
  • the hot water-soluble fibers are removed either without pressure under hot wash conditions or in an autoclave at liquor temperatures above 100 ° C. This removes the hot water-soluble fiber from the microfiber nonwoven.
  • the removal of the hot water-soluble fiber can preferably also be combined with a pull-out dyeing, provided high dyeing temperatures are used in particular in autoclaves.
  • the method according to the invention gives extremely soft, robust synthetic leather with an excellent feel.
  • further post-treatment steps are preferably carried out, such as the equipment for improving the grip or fine-grinding the surfaces.
  • a fiber pile is produced from 80 parts by weight of a polyester-polyamide split fiber with a titer of 2.2 dtex and a fiber length of 51 mm and 20 parts by weight of a polyvinyl alcohol fiber with a titer of 1.4 dtex and a fiber length of 38 mm and this is consolidated by intensive needling ,
  • the nonwoven fabric obtained in this way is subjected to a high-pressure water jet treatment in which approximately 90% of the polyester-polyamide fibers are split into microfibers.
  • the nonwoven fabric is then impregnated with a binder, which is composed of aqueous dispersions which contain 70 parts by weight of polyurethane, 20 parts by weight of polyvinyl alcohol, 5 parts by weight of color pigments and, as the remainder, fillers and improvers for the handle as solids.
  • a binder which is composed of aqueous dispersions which contain 70 parts by weight of polyurethane, 20 parts by weight of polyvinyl alcohol, 5 parts by weight of color pigments and, as the remainder, fillers and improvers for the handle as solids.
  • a binder which is composed of aqueous dispersions which contain 70 parts by weight of polyurethane, 20 parts by weight of polyvinyl alcohol, 5 parts by weight of color pigments and, as the remainder, fillers and improvers for the handle as solids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

L'invention concerne un procédé pour produire un cuir synthétique à partir d'un non tissé contenant des microfibres. Ce procédé consiste à traiter des microfibres thermoplastiques présentant un titre compris entre 0,05 et 1,0 dtex et des fibres solubles dans l'eau chaude, présentant un titre compris entre 4 et 6 dtex dans un rapport en poids compris entre 90:10 et 30:70 pour former un non tissé présentant une masse surfacique comprise 80 et 1000 g/m2, et à imprégner ces deux types de fibres avec une dispersion aqueuse de liants, constituée d'une substance viscoélastique, dans un rapport en poids compris entre 25:75 et 75:25. Le fixage de la substance viscoélastique s'effectue par réticulation ou vulcanisation, puis la fibre soluble dans l'eau chaude est extraite du non tissé.
PCT/EP2000/009042 1999-09-16 2000-09-15 Procede pour produire un cuir synthetique WO2001020072A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
MXPA02002834A MXPA02002834A (es) 1999-09-16 2000-09-15 Metodo para producir un cuero sintetico.
KR1020027003530A KR20020041440A (ko) 1999-09-16 2000-09-15 합성 피혁의 제조 방법
JP2001523436A JP2003509596A (ja) 1999-09-16 2000-09-15 合成皮革の製造方法
EP00966028A EP1216322A1 (fr) 1999-09-16 2000-09-15 Procede pour produire un cuir synthetique
BR0014045-7A BR0014045A (pt) 1999-09-16 2000-09-15 Processo para produção de um couro sintético
CA002385307A CA2385307A1 (fr) 1999-09-16 2000-09-15 Procede pour la fabrication d'un cuir synthetique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944441.2 1999-09-16
DE19944441A DE19944441A1 (de) 1999-09-16 1999-09-16 Verfahren zur Herstellung eines synthetischen Leders

Publications (1)

Publication Number Publication Date
WO2001020072A1 true WO2001020072A1 (fr) 2001-03-22

Family

ID=7922262

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/009042 WO2001020072A1 (fr) 1999-09-16 2000-09-15 Procede pour produire un cuir synthetique

Country Status (9)

Country Link
EP (1) EP1216322A1 (fr)
JP (1) JP2003509596A (fr)
KR (1) KR20020041440A (fr)
CN (1) CN1375025A (fr)
BR (1) BR0014045A (fr)
CA (1) CA2385307A1 (fr)
DE (1) DE19944441A1 (fr)
MX (1) MXPA02002834A (fr)
WO (1) WO2001020072A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251473A1 (fr) * 2009-04-29 2010-11-17 Fiscagomma S.p.A. Étiquette
CN114438666A (zh) * 2022-02-16 2022-05-06 山东道恩斯维特科技有限公司 双组分纺粘法非织造布的制造方法

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
TW200825244A (en) 2006-12-13 2008-06-16 San Fang Chemical Industry Co Flexible artificial leather and its manufacturing method
DE102007049506B3 (de) * 2007-10-15 2009-05-28 Bayer Materialscience Ag Bodenbedeckung mit viskoelastischen Dämpfungseigenschaften
CN103003486B (zh) * 2010-05-07 2014-11-19 拜耳材料科技股份有限公司 织物涂布方法
CN103981730B (zh) * 2014-05-07 2015-12-09 安安(中国)有限公司 一种鞋用透湿型超细纤维合成革及其制造方法
CN112567092B (zh) * 2018-08-27 2024-01-02 株式会社可乐丽 人造革基材、其制造方法及立毛人造革

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US4390566A (en) * 1981-03-09 1983-06-28 Toray Industries, Inc. Method of producing soft sheet
JPS63243372A (ja) * 1987-03-30 1988-10-11 株式会社クラレ 高密度繊維シ−トの製造法

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DE2951307A1 (de) * 1979-12-20 1981-07-02 Akzo Gmbh, 5600 Wuppertal Wildlederartiges flaechengebilde
DE3381143D1 (de) * 1982-03-31 1990-03-01 Toray Industries Vlies aus ultra feinen verwirrten fasern, und verfahren zur herstellung desselben.
JPH0651953B2 (ja) * 1983-08-24 1994-07-06 旭化成工業株式会社 ヌバック調人工皮革

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JPS5590684A (en) * 1978-12-25 1980-07-09 Asahi Chemical Ind Production of flexible artificial leather
US4390566A (en) * 1981-03-09 1983-06-28 Toray Industries, Inc. Method of producing soft sheet
JPS63243372A (ja) * 1987-03-30 1988-10-11 株式会社クラレ 高密度繊維シ−トの製造法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251473A1 (fr) * 2009-04-29 2010-11-17 Fiscagomma S.p.A. Étiquette
CN114438666A (zh) * 2022-02-16 2022-05-06 山东道恩斯维特科技有限公司 双组分纺粘法非织造布的制造方法

Also Published As

Publication number Publication date
KR20020041440A (ko) 2002-06-01
DE19944441A1 (de) 2001-03-29
EP1216322A1 (fr) 2002-06-26
JP2003509596A (ja) 2003-03-11
MXPA02002834A (es) 2004-07-27
CN1375025A (zh) 2002-10-16
CA2385307A1 (fr) 2001-03-22
BR0014045A (pt) 2002-05-21

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