Sheetlike products and interior finishing materials

A sheet-like and ultra-fine fiber technology, applied in the field of sheet-like objects, can solve the problems of deterioration of light resistance, uneven brushing grade, short brushing, etc., and achieve the effect of beautiful appearance and excellent durability.

Active Publication Date: 2007-03-28
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] These polyurethane resins are suitable for use as a resin impregnated into a non-woven fabric made of ultrafine fibers and made to exist in the internal space of the non-woven fabric. In the case of a roughened leather sheet obtained by shaving the surface and roughening the surface fibers, for example, the copolymerized polycarbonate-based polyurethane resin with 4 to 6 carbon atoms described in Patent Document 4 cannot be obtained. The softening effect of the degree of grinding becomes a rough surface with short naps on the surface, so it is extremely difficult to obtain a good grade with beautiful naps
In addition, since the polycarbonate-based polyurethane resin derived from 2-methyl-1,8-octanediol described in Patent Document 5 uses a long-chain alkylene glycol, after being impregnated into a nonwoven fabric, In the case of wet coagulation, the coagulation speed is remarkably fast, and the foaming of the polyurethane inside the nonwoven fabric is large and coarse, and in addition, partial foaming results in poor r

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Sheetlike products and interior finishing materials
  • Sheetlike products and interior finishing materials
  • Sheetlike products and interior finishing materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] (Manufacture of nonwoven fabric)

[0143] Polystyrene was used as the sea component, polyethylene terephthalate was used as the island component, and an island-in-the-sea composite spinneret with 16 islands was used. The composite ratio is spun to form sea-island composite fibers, then stretched, crimped, and cut to obtain raw cotton for non-woven fabrics.

[0144]The obtained raw cotton is formed into a web using a cross-lapping machine, and is formed into a non-woven fabric through needle punching.

[0145] The nonwoven fabric made of this sea-island composite fiber was dipped in a 10% polyvinyl alcohol aqueous solution having a degree of saponification of 87%, and then dried. Then, polystyrene as a sea component was extracted and removed in trichloroethylene, and dried to obtain a nonwoven fabric composed of ultrafine fibers with a single fiber fineness of 0.1 dtex.

[0146] (manufacture of polyurethane)

[0147] 60 parts by weight of PNMOC and 40 parts by weight ...

Embodiment 2～4

[0152] Embodiment 2~4, comparative example 1~5

[0153] Production of polyurethane was carried out in the same manner as in Example 1, except that the composition and weight ratio of the polyols were changed to those shown in Table 1, respectively, and a napped leather-like sheet was produced.

[0154] Observation of the cross section in the thickness direction of the inside of the imitation leather sheet in Examples and Comparative Examples with a scanning electron microscope (SEM), as a result, polyurethane does not exist in the inside of the microfiber bundle substantially, but is located in the superfine fiber bundle. The outermost single fibers are partially bonded. Table 1 shows the composition and gelation point of the polyurethane in each example and comparative example, and the appearance quality, brush wear reduction, and durability of the obtained sheet.

[0155] Table 1

[0156] PU

Polyol Composition

() is the weight ratio

PU

Gelati...

Embodiment 5

[0160] (Manufacture of nonwoven fabric)

[0161] Polystyrene was used as the sea component, polyethylene terephthalate was used as the island component, and an island-in-the-sea composite spinneret with 16 islands was used, with 55% by weight of the sea component and 45% by weight of the island component. The composite ratio is spun to form sea-island composite fibers, then stretched, crimped, and cut to obtain raw cotton for non-woven fabrics.

[0162] The obtained raw cotton is formed into a web using a cross-lapping machine, and is formed into a non-woven fabric through needle punching.

[0163] The nonwoven fabric made of this sea-island composite fiber was dipped in a 10% polyvinyl alcohol aqueous solution having a degree of saponification of 87%, and then dried. Then, polystyrene as a sea component was extracted and removed in trichlorethylene, and dried to obtain a nonwoven fabric in which fiber bundles composed of ultrafine fibers with a single fiber fineness of 0.1 d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

A sheetlike product comprising a nonwoven fabric obtained by entangling ultrafine-denier fibers having single-fiber finenesses of 0.5dtex or below and an elastic resin binder containing a polyurethane as the main component, wherein the polyurethane is a polycarbonate-base polyurethane which has polycarbonate skeletons represented by the general formulae (1) and (2) and a gel point of 2.5 ml or above but below 6 ml: (1) wherein R1 and R2 are each independently an aliphatic hydrocarbon group having 7 to 11 carbon atoms; n and m are each a positive integer; and when R1 and R2 are different, the two kinds of units may be copolymerized in block or at random] and (2) wherein R3 and R4 are each independently an aliphatic hydrocarbon group having 3 to 6 carbon atoms; x and y are each a positive integer; and when R3 and R4 are different, the two kinds of units may be copolymerized in block or at random.

Description

technical field [0001] The present invention relates to sheets, in particular to napped leather-like sheets. Background technique [0002] On the surface of the sheet formed by impregnating polyurethane resin in the base material made of fibers, by using sandpaper or the like to roughen the fibers, a napped leather-like sheet of imitation suede or imitation sanded cowhide can be obtained. is well known. The properties of the intended leather-like sheet can be arbitrarily broadly designed by combining a base material composed of fibers and a polyurethane resin. For example, Patent Document 1 discloses that by adopting a polyurethane resin using polytetramethylene glycol, an organic diisocyanate, and a diol chain extender, it is possible to obtain an Disadvantaged, artificial leather-like with an extremely soft hand. [0003] On the other hand, the brushed imitation leather sheet has an appearance and surface similar to natural leather, and can be seen to have advantages su...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06N3/14C08G18/65
Inventor 矢挂善和上野胜西村诚
Owner TORAY IND INC
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