US3822174A - Imitation leather material - Google Patents

Imitation leather material Download PDF

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US3822174A
US3822174A US00236058A US23605872A US3822174A US 3822174 A US3822174 A US 3822174A US 00236058 A US00236058 A US 00236058A US 23605872 A US23605872 A US 23605872A US 3822174 A US3822174 A US 3822174A
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United States
Prior art keywords
flock
imitation leather
layer
binding agent
textile
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Expired - Lifetime
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US00236058A
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J Hefele
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KUFNER TEXTILWERKE KG
KUFNER TEXTILWERKE KG DT
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KUFNER TEXTILWERKE KG
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    • 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
    • D06N3/004—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 flocked webs or pile fabrics upon which a resin is applied; Teasing, raising web before resin application
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23943—Flock surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24438—Artificial wood or leather grain surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • Y10T428/2907—Staple length fiber with coating or impregnation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2139—Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting

Definitions

  • the material of this invention comprises at least one layer of a textile sheet material each sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet material also being permeated by a binding agent and the flock layers being held together by a flock binder material.
  • This invention relates to imitation leather materials made from flocked textile sheet materials and binding agents.
  • the object of the present invention is to provide an imitation leather material having improved porosity and capacity to absorb moisture.
  • a porous, imitation leather material which comprises at least one layer of a textile sheet material each sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet material also being permeated by a binding agent and the flock layers being held together by a flock binder material.
  • a preferred imitation leather according to this invention has a single textile sheet sandwiched between two flock layers.
  • the flock fibres are suitably less than 2 mm. long, preferably less than 1 mm. long. While the preferred textile material is woven or knitted, any other suitable textile material such as non-woven or stretch-bonded material may be used.
  • the textile material is preferably formed of synthetic fibres such as polyamide, polyester or polyacrylic fibres.
  • synthetic fibres such as polyamide, polyester or polyacrylic fibres.
  • continuous filaments with a fibre size of 1.0 to 6.0 denier are worked into single or double knitted material on raschel knitting machines.
  • the imitation leather may consist of several layers of flock and several layers of textile material.
  • three layers of flock may have sandwiched between them two layers of textile material in the sequence: flock layer-textile layer-flock layer-textile layer-flock layer.
  • the imitation leather may be prepared, for example, in the following manner:
  • a thin layer of a polyurethane-forming mixture of prepolymerised polyurethane having terminal hydroxyl groups, a tri-isocyanate and an accelerator dissolved in up to about 10% trichlorethylene is applied by painting or brushing on a smooth or patterned substrate to which polyurethane does not adhere, such as a siliconised paper. Wool flock 0.5 mm. in length is applied electrostatically to this painted-on layer serving as flock binder with the assistance of a beater to assist penetration of the flock into the binder. The excess flock is then sucked off but the adhering flock is pressed on, dried and covered with a thickly painted-on polyurethane-forming mixture as binding agent.
  • a sheet of single closely woven or knitted polyamide filaments having a weight of about g. per square meter is embedded in this second painted-on application penetrating the layer of flock and is tightly pressed onto the covered substrate.
  • the laminated woven material is covered with a painted-on third layer of a polyurethane-forming mixture.
  • a dense layer of flock is applied to this layer by electrostatic means with the help of a heater and the excess flock is sucked off. The flock is again pressed on and, after evaporating the solvent, the last layer of binding agent is painted on this layer of flock.
  • any residual solvent is evaporated.
  • the imitation leather is now stripped 01f from the substrate and on one side has a mirror image of the texture or smoothness of the substrate surface but is permeated with numerous capillaries.
  • the other side of the imitation leather has the appearance of suede and also has a particularly high number of capillaries.
  • the imitation leather By adding pigment or dye to the binding agent and by dying the fibrous flock and the textile material, the imitation leather can be rendered in any desired colour.
  • the imitation leather consists of about 180 grm. of flock, grm. of binder and 75 grm. of woven or knitted material per sq. meter and has a thickness of about 0.7- 0.8 mm.
  • the degree of absorptivity of the imitation leather can be increased.
  • Such impregnated imitation leather having a rayon flock in its flock layer readily absorbs drops of water on its suede side in a few seconds and is dry to the touch after absorbing the water.
  • the ability to absorb moisture is about three times as high as with previously known imitation leather and reaches about 20% in an atmosphere substantially saturated with water vapour.
  • the imitation leather is particularly suitable as an inner lining for shoes.
  • the imitation leather may also be used as a synthetic uppers material. Other possible uses are for upholstery, bags and luggage.
  • the imitation leather material comprises a knitted material 4 formed of synthetic fibres sandwiched between two slightly compressed flock layers 1 and 2 permeated by a binding agent 3. Another binding agent 5 permeates textile layer 4.
  • a porous imitation leather material which comprises a layer of textile sheet material sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet also being permeated by a binding agent and the flock materials being held together by a flock binder material, the improvements which consist in the textile sheet material being a material knitted from a synthetic fiber and one surface of the imitation leather being smooth or textured and permeated by capillaries and the other being of suede-like appearance and permeated by capillaries.
  • a material according to Claim 1 wherein the flock fibres are less than 2 mm. in length, preferably less than 1 mm.
  • a material according to Claim 1 wherein the fibrous flock includes at least one fibrous material selected from the group consisting of natural cellulose fibres, regenerated cellulose fibres, wool fibres and collagen fibres.
  • a material according to Claim 1 wherein the binding agent is selected from the group consisting of polyurethanes, polymethacrylates and acrylonitrile-butadienestyrene copolymers.
  • a method of forming a porous imitation leather material which comprises the steps of:
  • the fibrous flock includes at least one fibrous material selected from the group consisting of natural cellulose fibres, regenerated cellulose fibres, wool fibres and collagen fibres.
  • binding agent is selected from the group consisting of polyurethanes, polymethacrylates and acrylonitrile-butadienestyrene copolymers.
  • a method according to Claim 7 which comprises the further step of impregnating the porous imitation leather with a watery liquor containing a water soluble polyamide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

THIS INVENTION PROVIDES AN IMITATION LEATHER HAVING IMPROVED POROSITY AND CAPACITY TO ABSORB MOISTURE. THE MATERIAL OF THIS INVENTION COMPRISES AT LEAST ONE LAYER OF A TEXTILE SHEET MATERIAL EACH SANDWICH BETWEEN TWO LAYERS OF FIBROUS FLOCK PERMEATED WITH A BINDING AGENT, THE TEXTILE SHEET MATERIAL ALSO BEING PERMEATED BY A BINDING AGENT AND THE FLOCK LAYERS BEING HELD TOGETHER BU Y A FLOCK BINDER MATERIAL.

Description

y 1974 I J. HEFELE' I IHITATION LEATHER MATERIAL Filed latch 20, 1972 nited States Patent Oifice 3,822,174 IMITATION LEATHER MATERIAL Josef Hefele, Grafeling, Germany, assignor to Kufner Textilwerke KG, Munich, Germany Filed Mar. 20, 1972, Ser. No. 236,058 Claims priority, application Germany, Mar. 22, 1971, P 21 13 790.6 Int. Cl. D03d 27/00 US. Cl. 161-82 12 Claims ABSTRACT OF THE DISCLOSURE This invention provides an imitation leather having improved porosity and capacity to absorb moisture. The material of this invention comprises at least one layer of a textile sheet material each sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet material also being permeated by a binding agent and the flock layers being held together by a flock binder material.
BACKGROUND OF THE INVENTION This invention relates to imitation leather materials made from flocked textile sheet materials and binding agents.
Previously known imitation leathers dilfer from material leather principally in that they have insufiicient capacity to absorb moisture. Articles of clothing such as shoes made from such imitation leather are uncomfortable to wear because the material soon reaches its limit of moisture absorption.
The object of the present invention is to provide an imitation leather material having improved porosity and capacity to absorb moisture.
SUMMARY According to the present invention, there is provided a porous, imitation leather material which comprises at least one layer of a textile sheet material each sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet material also being permeated by a binding agent and the flock layers being held together by a flock binder material.
BRIEF DESCRIPTION OF THE DRAWINGS The single figure of the accompanying drawings illustrates a preferred embodiment of the imitation leather material according to the invention.
DETAILED DESCRIPTION OF THE INVENTION It is already known to make imitation leather by flocking textile substrates using flock binders. These known materials differ from the material of this invention in that the flocked material usually has a nap or pile which is free from binding agent projecting beyond the flock binder and in that the layer of flock covers the textile substrate on one side only.
A preferred imitation leather according to this invention has a single textile sheet sandwiched between two flock layers. The flock fibres are suitably less than 2 mm. long, preferably less than 1 mm. long. While the preferred textile material is woven or knitted, any other suitable textile material such as non-woven or stretch-bonded material may be used.
The textile material is preferably formed of synthetic fibres such as polyamide, polyester or polyacrylic fibres. Suitably, continuous filaments with a fibre size of 1.0 to 6.0 denier are worked into single or double knitted material on raschel knitting machines.
3,822,174 Patented July 2, 1974 urethancs or reactive polymethacrylates. Other elastic binding agents such as acrylonitrile-butadiene-styrene c0- polymers, which are applied in solution or dispersion, may also be used. The same or similar materials may be used as the flock binder.
Instead of two layers of flock and an embedded textile material, the imitation leather may consist of several layers of flock and several layers of textile material. For example three layers of flock may have sandwiched between them two layers of textile material in the sequence: flock layer-textile layer-flock layer-textile layer-flock layer.
The imitation leather may be prepared, for example, in the following manner:
A thin layer of a polyurethane-forming mixture of prepolymerised polyurethane having terminal hydroxyl groups, a tri-isocyanate and an accelerator dissolved in up to about 10% trichlorethylene is applied by painting or brushing on a smooth or patterned substrate to which polyurethane does not adhere, such as a siliconised paper. Wool flock 0.5 mm. in length is applied electrostatically to this painted-on layer serving as flock binder with the assistance of a beater to assist penetration of the flock into the binder. The excess flock is then sucked off but the adhering flock is pressed on, dried and covered with a thickly painted-on polyurethane-forming mixture as binding agent.
A sheet of single closely woven or knitted polyamide filaments having a weight of about g. per square meter is embedded in this second painted-on application penetrating the layer of flock and is tightly pressed onto the covered substrate. After evaporating the solvent, the laminated woven material is covered with a painted-on third layer of a polyurethane-forming mixture. A dense layer of flock is applied to this layer by electrostatic means with the help of a heater and the excess flock is sucked off. The flock is again pressed on and, after evaporating the solvent, the last layer of binding agent is painted on this layer of flock.
By leaving the material at room temperature for a period or by leaving at a higher temperature for a shorter period if the binding agent is condensed into polyurethane, any residual solvent is evaporated.
The imitation leather is now stripped 01f from the substrate and on one side has a mirror image of the texture or smoothness of the substrate surface but is permeated with numerous capillaries. The other side of the imitation leather has the appearance of suede and also has a particularly high number of capillaries.
By adding pigment or dye to the binding agent and by dying the fibrous flock and the textile material, the imitation leather can be rendered in any desired colour. Preferably the imitation leather consists of about 180 grm. of flock, grm. of binder and 75 grm. of woven or knitted material per sq. meter and has a thickness of about 0.7- 0.8 mm.
By subsequently impregnating the material with a watery liquor containing a small amount of water-soluble polyamide, the degree of absorptivity of the imitation leather can be increased. Such impregnated imitation leather having a rayon flock in its flock layer readily absorbs drops of water on its suede side in a few seconds and is dry to the touch after absorbing the water. The ability to absorb moisture is about three times as high as with previously known imitation leather and reaches about 20% in an atmosphere substantially saturated with water vapour. The imitation leather is particularly suitable as an inner lining for shoes. When provided with a thicker surface layer, which may, for example, consist of microporous polyurethane or foamed PVC, the imitation leather may also be used as a synthetic uppers material. Other possible uses are for upholstery, bags and luggage.
In the embodiment illustrated in the drawing, the imitation leather material comprises a knitted material 4 formed of synthetic fibres sandwiched between two slightly compressed flock layers 1 and 2 permeated by a binding agent 3. Another binding agent 5 permeates textile layer 4.
I claim:
1. In a porous imitation leather material which comprises a layer of textile sheet material sandwiched between two layers of fibrous flock permeated with a binding agent, the textile sheet also being permeated by a binding agent and the flock materials being held together by a flock binder material, the improvements which consist in the textile sheet material being a material knitted from a synthetic fiber and one surface of the imitation leather being smooth or textured and permeated by capillaries and the other being of suede-like appearance and permeated by capillaries.
2. A material according to Claim 1 wherein the flock fibres are less than 2 mm. in length, preferably less than 1 mm.
3. A material according to Claim 1 wherein the fibrous flock includes at least one fibrous material selected from the group consisting of natural cellulose fibres, regenerated cellulose fibres, wool fibres and collagen fibres.
4. A material according to Claim 1 wherein the binding agent is selected from the group consisting of polyurethanes, polymethacrylates and acrylonitrile-butadienestyrene copolymers.
5. A porous imitation leather as claimed in Claim 1 where one surface is a smooth surface and the other has the appearance of suede.
6. A material according to Claim 1 which is impregnated with a water soluble polyamide.
7. A method of forming a porous imitation leather material which comprises the steps of:
(a) brushing a layer of flock binder on to a substrate to which the binder does not adhere;
(b) electrostatically applying fibrous flock to the flock binder to embed one end of the flock fibres in the flock binder;
(c) applying a layer of the flock binding agent to the flock layer;
(d) applying to and pressing into the layer of binding ggent a textile sheet material knitted from synthetic bres;
(e) applying a layer of flock binder to the said textile sheet;
(f) electrostatically applying fibrous flock to the flock binder to embed one end of the flock fibres in the flock, binder;
(g) applying a layer of binding agent to the flock layer and, if so desired;
(h) repeating steps (d), (e), (f) and (g) at least once.
8. A method according to Claim 7 wherein the flock fibres are less than 2 mm. in length, preferably less than 1 mm.
9. A method according to Claim 7 wherein the fibrous flock includes at least one fibrous material selected from the group consisting of natural cellulose fibres, regenerated cellulose fibres, wool fibres and collagen fibres.
10. A method according to Claim 7 wherein the binding agent is selected from the group consisting of polyurethanes, polymethacrylates and acrylonitrile-butadienestyrene copolymers.
11. A method as claimed in Claim 7 where the porous imitation leather is subsequently impregnated with an aqueous solution of a water-soluble polyamide.
12. A method according to Claim 7 which comprises the further step of impregnating the porous imitation leather with a watery liquor containing a water soluble polyamide.
References Cited UNITED STATES PATENTS 2,071,626 2/ 1937 Harris 1177 3,592,719 7/1971 Ofiray 16164 3,573,121 3/1971 Fukada 161Dig. 2 3,684,637 8/1972 Anderson 161-64 MARION E. McCAMISH, Primary Examiner US. Cl. X.R.
117-26; 161-64, 89, 170, Dig. 2
US00236058A 1971-03-22 1972-03-20 Imitation leather material Expired - Lifetime US3822174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2113790A DE2113790C3 (en) 1971-03-22 1971-03-22 Process for the production of breathable synthetic leather

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US3822174A true US3822174A (en) 1974-07-02

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IT (1) IT950271B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961116A (en) * 1973-04-13 1976-06-01 United Merchants And Manufacturers, Inc. Novel flocked fabric
US3973067A (en) * 1971-05-18 1976-08-03 The Kendall Company Short-fibered nonwoven fabrics
DE3313681A1 (en) * 1983-04-15 1984-10-25 Konrad Hornschuch Ag, 7119 Weissbach Textile composite, process for its production, and its use
US20050031698A1 (en) * 2001-08-30 2005-02-10 Shinichi Sotome Materials sustainedly releasing drug in vivo

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887400A (en) * 1957-12-20 1959-05-19 United Shoe Machinery Corp Solvent activatable stiffener material
GB1159809A (en) * 1966-05-19 1969-07-30 Smith & Newphew Plastics Ltd Improvements in and relating to Flock Materials.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973067A (en) * 1971-05-18 1976-08-03 The Kendall Company Short-fibered nonwoven fabrics
US3961116A (en) * 1973-04-13 1976-06-01 United Merchants And Manufacturers, Inc. Novel flocked fabric
DE3313681A1 (en) * 1983-04-15 1984-10-25 Konrad Hornschuch Ag, 7119 Weissbach Textile composite, process for its production, and its use
US20050031698A1 (en) * 2001-08-30 2005-02-10 Shinichi Sotome Materials sustainedly releasing drug in vivo

Also Published As

Publication number Publication date
DE2113790A1 (en) 1972-09-28
DE2113790C3 (en) 1978-09-28
FR2130103B1 (en) 1976-03-05
DE2113790B2 (en) 1975-11-20
FR2130103A1 (en) 1972-11-03
IT950271B (en) 1973-06-20

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