Composite fiber having elastomer and method for making the same, and a substrate having the composite fiber and method for making the same

Inactive Publication Date: 2011-06-30
SAN FANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]In the present invention, the TPE in the composite fiber can be dispersed uniformly and increase the adhesion between fibers, and the segmented fiber cross-section thereof may further prevent the TPE from becoming too adhesive and thus affecting the processing during the fabrication of fibers and non-woven fabric substrates. Therefore, the surface of the non-woven fabric becomes more delicate and smoother after hot-pressing, and the physical properties of the fabric are enhanced and a high dimensional stability is achieved. Moreover, no additional solvent is needed in the fiber refining of the non-woven fabric substrate, so an environment-friendly fiber opening process with no waste is provided, and the non-woven fabric substrate has textile feeling like superfine fibers and resilient touch similar to natural leather. Thus, the artificial leather made from the composite fiber has excellent textile feeling and physical properties.

Problems solved by technology

However, strict control technology is required in the PU-impregnation stage of the artificial leather, and although the PU-impregnated substrate has excellent texture and durability, the fibers are filled with a resin to form a solid construction, resulting in poor air permeability and difficulty in achieving lightweight performance.
Moreover, as a solvent is used in PU-impregnation, the fabrication is complicated, and environmental problems may occur.
Since the fiber distribution process must be implemented with the solvent or lye, severe pollution to the environment will occur.
However, as the distribution of the impregnated binder from the interior to the exterior of the non-woven fabric can hardly be uniform, the fabricated artificial leather lacks softness on the surface, has low inter-layer strength, and cannot be used as a material for shoes in rigorous conditions.
However, when the migration is prevented according to this method, as a minute amount of aqueous emulsion of the binder resin is left on the other side, the curing degree varies on the two sides of the substrate, and thus it is difficult to fabricate an artificial leather substrate made of fine fibers with no binder resin adhered to the surface thereof.
However, as the PVA resin is inelastic and easily solved in water, the whole fabric lacks softness, and is easily attenuated in physical properties and cannot be used any more in a damp environment.
In this case, although the impregnation with an elastopolymer solution is not needed, the fabrication time and cost are not effectively reduced due to the additional mold releasing agent process.

Method used

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  • Composite fiber having elastomer and method for making the same, and a substrate having the composite fiber and method for making the same
  • Composite fiber having elastomer and method for making the same, and a substrate having the composite fiber and method for making the same
  • Composite fiber having elastomer and method for making the same, and a substrate having the composite fiber and method for making the same

Examples

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example 1

[0050]SEBS chips (having a melt flow rate of 25 g / 10 min, manufactured by Kraton Polymers Inc.) and PBT chips (having a intrinsic viscosity of 0.94 dl / gr, manufactured by Chang Chun Plastics Co., Ltd.) are used as raw materials in composite spinning for 24 segmented composite spinning, in which the melting temperature of the SEBS is set to 270° C., the melting temperature of the PBT is set to 280° C., and the composite weight ratio of SEBS / PBT is 40 / 60. Spinning winding is then performed at a rate of 700 m / min to form a 15-denier composite fiber. Afterwards, the fiber is drawn by a multiple of 2.8, heat-setting is performed on the fiber having crimp with crimper machine, finally the fiber is cut into a composite staple fiber at a length of 60 mm by cutting machine. The composite staple fiber has the following physical properties: fineness: 6 denier, fiber strength: 2.1 g / den, and elongation: 80%.

[0051]The composite staple fiber is then blended with a polyester staple fiber having a ...

example 2

[0054]TPEE chips (having a hardness of 72 D, manufactured by LG Chem Co., Ltd.) and PET chips (having a intrinsic viscosity of 0.94 dl / gr, manufactured by Shinkong Synthetic Fibers Corporation) are used as raw materials in composite spinning for 24 segmented composite spinning, in which the melting temperature of the TPEE is set to 275° C., the melting temperature of the PET is set to 280° C., and the composite weight ratio of TPEE / PET is 40 / 60. Spinning winding is then performed at a rate of 700 m / min to form a 10-denier composite fiber. Afterwards, the fiber is drawn by a multiple of 2.5, heat-setting is performed on the fiber having crimp with crimper machine, finally the fiber is cut into a composite staple fiber at a length of 60 mm by cutting machine. The composite staple fiber has the following physical properties: fineness: 4 denier, fiber strength: 2.5 g / den, and elongation: 50%.

[0055]The composite staple fiber is then blended with a polyester staple fiber at a weight ratio...

example 3

[0056]SEBS chips (having a melt flow rate of 25 g / 10 min, manufactured by Kraton Polymers Inc.) and PET chips (having a intrinsic viscosity of 0.64 dl / gr, manufactured by Shinkong Synthetic Fibers Corporation) are used as raw materials in composite spinning for 24 segmented composite spinning, in which the melting temperature of the SEBS is set to 270° C., the melting temperature of the PET is set to 285° C., and the composite weight ratio of SEBS / PET is 45 / 55. Spinning winding is then performed at a rate of 800 m / min to form a 13-denier composite fiber. Afterwards, the fiber is drawn by a multiple of 3.1, heat-setting is performed on the fiber having crimp with crimper machine, finally the fiber is cut into a composite staple fiber at a length of 60 mm by cutting machine. The composite staple fiber has the following physical properties: fineness: 4.5 denier, fiber strength: 2.0 g / den, and elongation: 60%.

[0057]The composite staple fiber is then blended with a PET staple fiber havin...

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Abstract

A composite fiber having elastomer and method for making the same, and a substrate having the composite fiber and method for making the same are provided. The composite fiber includes a first composition and a second composition. The first composition is thermoplastic non-elastomer, and the second composition is thermoplastic elastomer (TPE). The second composition is in an amount of 5 to 70 weight % of the composite fiber. The first composition and the second composition are alternately distributed in a circumference of a cross-section of the composite fiber, and the length of the second composition is less than 50% of the total length of the circumference. The TPE can be dispersed uniformly and increase the adhesion between fibers, and the segmented fiber cross-section thereof further prevents the TPE from becoming too adhesive and affecting the processing during the fabrication of fibers and non-woven fabric substrates. Therefore, the non-woven fabric substrate or artificial leather made from the composite fiber has excellent textile feeling and physical properties.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a composite fiber and a method for making the same, and a substrate having the composite fiber and a method for making the same, and more particularly to a composite fiber having elastomer and a method for making the same, and a substrate having the composite fiber and a method for making the same.[0003]2. Description of the Related Art[0004]Artificial leather is generally fabricated with the following method. A non-woven fabric (containing fibers made of non-elastomeric polymer such as nylon or polyester) is doped / impregnated in an elastopolymer solution or a latex solution (mainly containing polyurethane (PU)), and the elastopolymer is then cured through a wet or dry process. The non-woven fabric doped with the elastopolymer is cured into a sponge or a block-shaped structure, in which the cured elastopolymer covers and surrounds fiber bundles.[0005]Natural leather has a substrate const...

Claims

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Application Information

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IPC IPC(8): B32B5/12D01D5/30
CPCB32B5/08B32B5/26B32B27/02B32B27/12B32B27/28B32B27/32Y10T428/24074B32B27/40D01F8/04D01F8/06D01F8/14B32B37/14D04H5/06B32B27/36D04H1/5416D04H1/5418Y10T428/2929Y10T442/602D04H1/485D04H1/49D04H1/498D04H1/552D04H3/105D04H3/11D04H3/147D06N3/0027
InventorWANG, LUNG-CHUANFENG, CHUNG-CHIHLIN, CHIH-YIHUANG, SZU-WEIYANG, KAO-LUNGTUNG, JUI-PENG
OwnerSAN FANG CHEM IND