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A sheet-like, polyurethane resin technology, used in fiber processing, textiles and papermaking, etc., can solve the problems of low polyurethane content, hard hand feel, significant changes, etc., to achieve excellent durability and light resistance, beautiful surface appearance , Soft wrinkle recovery effect

Inactive Publication Date: 2020-06-19
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of polyurethane in the leather-like sheet disclosed in this proposal is very small. When used for a long time, there is the following problem: the pile on the surface will fall off and the appearance will change significantly. In extreme cases, as a reinforcement The woven fabric of the material is exposed to the surface
In addition, when using such a water-based polyurethane resin to manufacture a pile-like leather-like sheet, if the adhesion amount of the polyurethane resin is increased in order to improve durability, even if the adhesion amount is increased by a small amount, the pile will become extremely thick. short, or make the handle hard
Therefore, it is difficult to obtain a leather-like sheet having both softness and durability

Method used

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Experimental program
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Effect test

Embodiment

[0213] Next, the sheet-shaped article of the present invention and its manufacturing method will be described in further detail using examples, but the present invention is not limited to these examples.

[0214] [Evaluation method]

[0215] (1) The feel of the sheet:

[0216] A. Compression ratio

[0217] As an indicator of the flexibility of the sheet, based on the method for measuring the compressibility described in JIS L1096-8.20 (2010), three test pieces of 3 cm × 3 cm were stacked and measured at 50 gf / cm 2 Place it under the standard pressure for 1 minute, measure the thickness (T0: mm), then, at 300gf / cm 2 It was left under pressure for 1 minute, and the thickness (T1: mm) was measured. Using the thickness measured by the above-mentioned measuring method, the compressibility (Cr: %) was calculated using the following mathematical formula.

[0218] · Cr=(T0-T1) / T0×100.

[0219] B. Compressive modulus of elasticity

[0220] As an indicator of the wrinkle recovery ...

manufacture example 1

[0244] [Production Example 1] [Preparation of polyester polyol (a) having carbonate group and oxycarbonyl group as ester group]

[0245] Into a reaction container equipped with a stirrer and a heating device, 500 parts by mass of a polycarbonate diol with an Mn of 2,000 ["ETERNACOLL UH-200" manufactured by Ube Industries, Ltd.], 500 parts by mass of a polycarbonate diol with an Mn of 2,000 Polycaprolactone diol ["PLACCEL 220" manufactured by Daicel Corporation] and 0.1 parts by mass of dibutyltin oxide as a catalyst were heated to a temperature of 220°C under a nitrogen atmosphere, and a transesterification reaction was carried out for 10 hours to obtain Mn 2,000 polyester polyol (a) having a carbonate group and an oxycarbonyl group as an ester group.

manufacture example 2

[0246] [Production Example 2] [Preparation of polyester polyol (b) having carbonate group and oxycarbonyl group as ester group]

[0247] The amount of polycarbonate diol with Mn of 2,000 ["ETERNACOLL UH-200" manufactured by Ube Industries, Ltd.] was changed to 600 parts by mass, and the amount of polycaprolactone diol with Mn of 2,000 ["ETERNACOLL UH-200" manufactured by Daicel Corporation] was changed to 600 parts by mass. Except having changed the addition amount of PLACCEL 220"] into 400 mass parts, it carried out similarly to manufacture example 1, and obtained the polyester polyol (b) which has a carbonate group and an oxycarbonyl group as an ester group.

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Abstract

The present invention provides a sheet having a uniform feeling, a beautiful surface texture, a soft hand with excellent wrinkle recovery, and excellent light resistance and hydrolysis resistance using a polyurethane resin having an oxycarbonyl group and a carbonate group as an ester group Shapes, and methods of making them. The sheet-like article of the present invention is formed by adding a polyurethane resin as a binder to a fibrous base material formed of ultrafine fibers, and the polyurethane resin satisfies the following conditions (I) and (II). A polyurethane resin having an oxycarbonyl group and a carbonate group as ester groups inside the polyurethane resin, and (II) a polyurethane resin in which the sum of the urethane group content and the urea group content of the polyurethane resin is 7.0 to 11.0% by mass.

Description

technical field [0001] The present invention relates to a sheet-like product obtained by imparting a polyurethane resin to a fibrous base material. Specifically, it relates to a sheet-like product having a good surface quality and feel, and excellent durability and light resistance. Background technique [0002] For suede-style, nubuck fabrics manufactured by forming fibers on the surface of a sheet-like object mainly composed of a fibrous base material (formed of fabric such as non-woven fabric) and polyurethane resin into pile using sandpaper, etc. Nubuck-style leather-like sheets have an appearance and surface resembling natural leather, and are considered to have excellent characteristics such as uniformity and dyeing fastness that natural leather does not have, and are not only used for clothing, but also It is also widely used in the skin of furniture such as sofas and the skin of automotive interior decoration materials, etc., for long-term use of 5 to 10 years. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14C08L75/04D06M15/564
CPCD06M15/564C08G18/664C08G18/73C08G18/7621C08G18/7671C08G18/0823C08G18/12C08G18/3206C08G18/4202C08G18/4277C08G18/44D06N3/14C08G18/324C08L75/04C08J5/046C08J2375/04C08J2467/02
Inventor 中井俊一郎村原寿松崎行博西村诚
Owner TORAY IND INC
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