US3876745A - Process for the production of a dense stitched fleece - Google Patents

Process for the production of a dense stitched fleece Download PDF

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Publication number
US3876745A
US3876745A US014808A US1480870A US3876745A US 3876745 A US3876745 A US 3876745A US 014808 A US014808 A US 014808A US 1480870 A US1480870 A US 1480870A US 3876745 A US3876745 A US 3876745A
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US
United States
Prior art keywords
fleece
stitched
fibers
binding
cooled
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US014808A
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English (en)
Inventor
Heinz Fleissner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vepa AG
Original Assignee
Vepa AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691907860 external-priority patent/DE1907860C3/de
Application filed by Vepa AG filed Critical Vepa AG
Priority to US496896A priority Critical patent/US3912432A/en
Application granted granted Critical
Publication of US3876745A publication Critical patent/US3876745A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D04H3/153—Mixed yarns or filaments
    • 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
    • D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving

Definitions

  • the present invention relates to a process for producing a dense stitched fleece suitable base material (substrate) for synthetic leather, and in particular to a process for producing a densely stitched fleece comprising at least two types of fibers, one of which is employed as the binding fiber.
  • This fleece which is suitable as a base material for synthetic leather, can be strengthened by means of a thermal treatment.
  • fleeces As a base material for synthetic leather. These fleeces generally contain a large proportion of high-shrinkage fibers, for example about 30-50%, or more. In case high-shrinkage fibers of polyesters or polyamides are employed. the shrinking step is most advantageous conducted in a water bath heated to a temperature of about 90-95C. However, in this connection, considerable difficulties are encountered in obtaining a uniform shrinkage over a specific width of the material. A uniform shrinkage is necessary since this produces the desired closeness density in the material. Only when the density is uniform is it possible to obtain uniform properties in synthetic leather. When using polypropylene as the shrinkage fiber, the shrinking step is carried out in heated air.
  • An object of the present invention is to avoid the prior art disadvantages in providing a process for pro ducing a stitched fleece suitable as a base material for synthetic leather.
  • Another object of the present invention is to provide an improved process for producing a base material for synthetic leather wherein a good bonding of the individual fibers and a uniform compactness of the fibers is achieved.
  • a further object of the present invention is to avoid the difficulties encountered in the treatment of shrunk fleece but, at the same time, imparting to the base material the similar advantageous properties of a shrunk fleece.
  • a particularly good fleece for a base material for synthetic leather is obtained according to the present process by providing that the fleece contains up to about 50% binding fibers, preferably about l0-l 5% binding fibers, and is strengthened by a thermal treatment and a pressure treatment as described above. By increasing the proportion of binding fibers within the desired proportions noted above, the closeness of the fleece can be enhanced.
  • a fleece consists of a specific fiber having a specific melting point. If another fiber having a different chemical composition and a lower melting point is added to this fiber, it serves as a binding fiber when the temperature of the fleece is increased in the range of the melt ing point of said another fiber.
  • the fleece as defined by the present invention comprises at least two of any material of synthetic fibers having a defined melting point, at least one of said fibers having a melting point lower than that of the remaining fibers.
  • the fibers which can be utilized by the present inven tion include any of the natural or synthetic fibers.
  • the natural fibers can include cotton, wool, silk, cellulose, etc.
  • the synthetic fibers may comprise synthetic polymers such as polyolefins, e.g., polyethylene, polypropoylene, etc., polyamides, e.g., Nylon 6 obtained by condensation of caprolactam, Nylon 66 obtained by the condensation of hexamethylenediamine with adipic acid, etc., polyesters, e.g., polyethylene terephthalate, etc., phenolic resins, e.g., phenol formaldehyde resins, urea formaldehyde resins, etc., polyvinyl materials, e.g., polyvinyl chloride, polyvinyl acetate etc., and acrylate resins, such as polymethylmethacrylate.
  • polyolefins e.g., polyethylene, polypropoylene,
  • Typical fleece compositions include. for example. polyester fibers utilizing polypropylene or polyamidcs as the biniding fiber.
  • a good. uniform coaiescence and thus a fleece which possesses an extraordinary uniform strength is obtained by combining the two types of fibers to a bi-component fiber.
  • Such a fleece can also be advantageously produced as a spun fleece from endless fibers.
  • a fleece of this type exhibits an especially high flexural elasticity and a wrinkle-recovery angle of about l7()l 80C.
  • bicomponent fibers include Nylon 66 and Nylon 6. Orlon 2l. 2] and 27 a polyester with a polyamide. and HS] and Nylon.
  • FIG. 1 shows a longitudinal section through the apparatus for carrying out the process of this invention
  • FIG. 2 shows a cross-section through the apparatus of FIG. I along line AA of FIG. I.
  • the apparatus for effecting the process of the present invention comprises a heat-insulated housing 1, containing a sieve drum 2, sujbected to a suction draft. Above and beneath the sieve drum 2, heating elements 3 are provided for heating the circulated treatment medium. for example air and/or steam. At the front face thereof, the sieve drum is provided with a fan 4, which draws the treatment medium out of the sieve drum and blows medium back to the outer surface of said sieve drum, via additional heating elements 5.
  • a cover plate 6 is arranged at that side of the sieve drum, which is free from the material being treated. The cover plate 6 prevents the treatment medium from entering the sieve drum 2 at this side.
  • the fleece 7 to be strengthened is fed to the sieve drum 2 on a conveyor belt 8, in the apparatus shown in the drawing, and is suddenly heated. in a shock-like manner i.e.. the fleece is rapidly heated. to the treatment temperature. by drawing the treatment medium into the drum through the fleece disposed on the sieve drum.
  • a perforated belt 9 is associated with a portion of the periphery of the sieve drum. said belt. which is under tension or pressure. functioning to compress the fleece. By utilizing this compressing step, a more satisfactory welding together of the binding fibers with the other fibers is accomplished.
  • the fleece is prevented from lateral shrinking by means of the bilateral guidance provided by the drum and the perforated belt.
  • a continuous process for producing a uniformly compacted stitched fleece which comprises:
  • a stitched fleece consisting essentially of at least two types of fibers having defined melting points, at least one type ofsaid fibers having a melting point lower than the others and being employed as binding fibers;
  • heating step (B) is conducted by utilizing a heating medium selected from the group consisting of air, steam and a steam-air mixture, said heating medium being drawn through the stitched fleece.
  • the fleece comprises polyester fibers containing polypropylene as the binding fiber.
  • the fleece comprises polyester fibers containing polyamides as the binding fiber.
  • the fleece contains a bi-component fiber selected from the group consisting of Nylon 66 -Nylon 6. Orlon 2l-23-27 and a polyester-polyamide mixture.
  • a continuous process for producing a uniformly compacted stitched fleece which comprises:
  • stitched fleece consisting essentially of at least two types of fibers having defined melting points, at least one type of said fibers having a melting point lower than the others and being employed as binding fibers;
  • gaseous treatment medium is selected from the group consisting of air. steam and a steam-air mixture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
US014808A 1968-02-14 1970-02-17 Process for the production of a dense stitched fleece Expired - Lifetime US3876745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US496896A US3912432A (en) 1968-02-14 1974-08-12 Base material for synthetic leather, and apparatus for the production thereof

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1660795 1968-02-14
DE19691907860 DE1907860C3 (de) 1969-02-17 Siebtrommelvorrichtung zum Herstellen eines Wirrfaservliesstoffes
DE19691909345 DE1909345A1 (de) 1968-02-14 1969-02-25 Wirrvlies und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
US3876745A true US3876745A (en) 1975-04-08

Family

ID=27180999

Family Applications (1)

Application Number Title Priority Date Filing Date
US014808A Expired - Lifetime US3876745A (en) 1968-02-14 1970-02-17 Process for the production of a dense stitched fleece

Country Status (7)

Country Link
US (1) US3876745A (xx)
BE (1) BE746012A (xx)
CH (2) CH522771A (xx)
DE (1) DE1909345A1 (xx)
FR (2) FR2001891A6 (xx)
GB (2) GB1237603A (xx)
NL (1) NL7002178A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160004A (en) * 1972-07-08 1979-07-03 Karl Kroyer St. Anne's Limited Production of fibrous sheet material
US5387382A (en) * 1992-02-22 1995-02-07 Firma Carl Freudenberg Method for manufacturing interior fitted part for motor vehicle
US5492580A (en) * 1992-05-08 1996-02-20 Gates Formed-Fibre Products, Inc. Nonwoven moldable composite and method of manufacture
AU687234B2 (en) * 1994-09-23 1998-02-19 Kimberly-Clark Worldwide, Inc. Fabrics composed of ribbon-like fibrous material and method to make the same
US20040112501A1 (en) * 2001-03-24 2004-06-17 Harri Dittmar Method of producing a thick, thermoformable, fiber-reinforced semi-finished product
US20040177911A1 (en) * 2001-02-08 2004-09-16 Harri Dittmar Method for producing a thermoplastically deformadable, fibre-reinforced semi-finished product
US20060244170A1 (en) * 2003-10-24 2006-11-02 Quadrant Plastic Composites Ag Method of producing a thermoplastically moldable fiber-reinforced semifinished product

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2218077C2 (de) * 1972-04-14 1983-12-01 Vepa AG, 4125 Riehen, Basel Verfahren zum Verfestigen von thermoplastische Fasern enthaltenden Vliesen
GB1524713A (en) * 1975-04-11 1978-09-13 Ici Ltd Autogeneously bonded non-woven fibrous structure
US4787947A (en) * 1982-09-30 1988-11-29 Chicopee Method and apparatus for making patterned belt bonded material
US4713134A (en) * 1982-09-30 1987-12-15 Chicopee Double belt bonding of fibrous web comprising thermoplastic fibers on steam cans
NZ205682A (en) * 1982-09-30 1987-03-31 Chicopee Double belt bonding of thermoplastic fibrous web
NZ205683A (en) * 1982-09-30 1987-03-31 Chicopee Patterned,non-woven thermoplastics fabric;heat fused on open mesh carrier belt
NZ205681A (en) * 1982-09-30 1987-03-31 Chicopee Non-woven fabric containing conjugate fibres fused with hot air
EP0110860A3 (en) * 1982-10-29 1985-07-31 LUXILON INDUSTRIES & CO. N.V. Thermoplastic textile material
DE3248753A1 (de) * 1982-12-31 1984-07-12 Akzo Gmbh, 5600 Wuppertal Verfahren zum verdichten von faservliesen
DE3334787A1 (de) * 1983-09-26 1985-04-11 Fleißner GmbH & Co, Maschinenfabrik, 6073 Egelsbach Verfahren und vorrichtung zum waermebehandeln von vliesen
EP0171806A3 (en) * 1984-08-16 1987-06-16 Chicopee An entangled nonwoven fabric including bicomponent fibers and the method of making same
FR3107473B1 (fr) 2020-02-26 2022-11-18 Psa Automobiles Sa Dispositif de commande simplifie d’un groupe de ventilation et/ou chauffage dans l’habitacle d’un vehicule.
CN113123015B (zh) * 2021-03-08 2023-07-07 山东宏恒达化纤有限公司 一种热风无纺布热压成型设备及其制备无纺布的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852485A (en) * 1954-04-22 1958-09-16 Polymer Corp Shaped polyamide articles
US3431334A (en) * 1966-11-14 1969-03-04 Albemarle Paper Co Manufacture of textryls
US3515609A (en) * 1965-09-27 1970-06-02 Bernard Rudloff Method of manufacture of reinforced unwoven felts
US3620892A (en) * 1968-05-07 1971-11-16 Allied Chem Dimensionally stable articles and method of making same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1524804A (fr) * 1966-05-31 1968-05-10 Vepa Ag Procédé et installation pour la consolidation de feutres aiguilletés, de feutres et de produits similaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852485A (en) * 1954-04-22 1958-09-16 Polymer Corp Shaped polyamide articles
US3515609A (en) * 1965-09-27 1970-06-02 Bernard Rudloff Method of manufacture of reinforced unwoven felts
US3431334A (en) * 1966-11-14 1969-03-04 Albemarle Paper Co Manufacture of textryls
US3620892A (en) * 1968-05-07 1971-11-16 Allied Chem Dimensionally stable articles and method of making same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160004A (en) * 1972-07-08 1979-07-03 Karl Kroyer St. Anne's Limited Production of fibrous sheet material
US5387382A (en) * 1992-02-22 1995-02-07 Firma Carl Freudenberg Method for manufacturing interior fitted part for motor vehicle
US5492580A (en) * 1992-05-08 1996-02-20 Gates Formed-Fibre Products, Inc. Nonwoven moldable composite and method of manufacture
AU687234B2 (en) * 1994-09-23 1998-02-19 Kimberly-Clark Worldwide, Inc. Fabrics composed of ribbon-like fibrous material and method to make the same
US20040177911A1 (en) * 2001-02-08 2004-09-16 Harri Dittmar Method for producing a thermoplastically deformadable, fibre-reinforced semi-finished product
US20040112501A1 (en) * 2001-03-24 2004-06-17 Harri Dittmar Method of producing a thick, thermoformable, fiber-reinforced semi-finished product
US7132025B2 (en) 2001-03-24 2006-11-07 Quadrant Plastic Composites Ag Method of producing a thick, thermoformable, fiber-reinforced semi-finished product
US20060244170A1 (en) * 2003-10-24 2006-11-02 Quadrant Plastic Composites Ag Method of producing a thermoplastically moldable fiber-reinforced semifinished product
US20100116407A1 (en) * 2003-10-24 2010-05-13 Quadrant Plastic Composites Ag Method Of Producing A Thermoplastically Moldable Fiber-Reinforced Semifinished Product
US8540830B2 (en) 2003-10-24 2013-09-24 Quadrant Plastic Composites, AG Method of producing a thermoplastically moldable fiber-reinforced semifinished product

Also Published As

Publication number Publication date
DE1907860B2 (de) 1977-03-17
FR2031475B1 (xx) 1974-07-05
DE1909345A1 (de) 1970-09-10
BE746012A (fr) 1970-08-17
DE1907860A1 (de) 1970-08-27
NL7002178A (xx) 1970-08-19
GB1237603A (en) 1971-06-30
FR2031475A1 (xx) 1970-11-20
FR2001891A6 (xx) 1969-10-03
CH522770A (de) 1972-05-15
GB1304444A (xx) 1973-01-24
CH522771A (de) 1972-05-15

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