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Dry-method preparing method for polyurethane micro-porous film

A technology of microporous membrane and polyurethane, which is applied in the field of microporous membrane, can solve the problems that the air permeability cannot be improved, the dry coating feels hard, and the processing technology is complicated, etc., and achieves low production cost, good moisture permeability and waterproof performance, and process simple effect

Inactive Publication Date: 2017-06-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention improves water pressure resistance, moisture permeability and washing durability, according to the method GB / T12704-1991A, the initial moisture permeability is ≧5000g / m 2 .d, but due to the extremely high water pressure resistance, the pore size of the microporous membrane is small, the problem of air permeability still exists, and the processing technology is relatively complicated
[0005] Another example is disclosed in CN103866579A, which discloses a kind of wet-process coating fabric, which is coated with two layers of wet-process microporous coatings on the cloth. Secondary coating, the air permeability cannot be improved, and the choice of different fabric processing is very limited

Method used

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  • Dry-method preparing method for polyurethane micro-porous film
  • Dry-method preparing method for polyurethane micro-porous film
  • Dry-method preparing method for polyurethane micro-porous film

Examples

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Effect test

Embodiment 1

[0030] The microporous membrane includes:

[0031] 20 parts of polyether polyurethane resin, 79 parts of solvent DMF, 0.6 parts of AC foaming agent, 0.4 parts of catalytic assistant ZnO;

[0032] The parts of the above components are all parts by mass, and the mass units used in each step are the same. (The following examples are the same)

[0033] The polyether polyurethane resin is PU888 of Luoyang Jiming Chemical Co., Ltd.;

[0034] The solvent is Tianjin Fuchen Chemical Reagent Factory DMF;

[0035] The blowing agent is AC blowing agent of Jiangyin Moore Chemical New Material Co., Ltd.;

[0036] The catalytic promoter is ZnO from Tianjin Fuchen Chemical Reagent Factory;

[0037] The said release paper is a flat release paper, specifically a silicone release paper.

[0038] Correspondingly, the present invention also provides a method for preparing a waterproof and moisture-permeable polyurethane microporous membrane, which includes the following steps:

[0039] S1: Mix the resin with 7...

Embodiment 2

[0044] The microporous membrane includes:

[0045] 25 parts of polyether polyurethane resin, 73 parts of solvent DMF, 1 part of AC blowing agent, 1 part of catalytic assistant ZnO;

[0046] The parts of the above components are all parts by mass, and the mass units used in each step are the same.

[0047] The polyether polyurethane resin is PU-K20 of Luoyang Jiming Chemical Co., Ltd.;

[0048] The solvent is Tianjin Fuchen Chemical Reagent Factory DMF;

[0049] The blowing agent is AC blowing agent of Jiangyin Moore Chemical New Material Co., Ltd.;

[0050] The catalytic promoter is ZnO from Tianjin Fuchen Chemical Reagent Factory;

[0051] The said release paper is a flat release paper, specifically a silicone release paper.

[0052] Correspondingly, the present invention also provides a method for preparing a waterproof and moisture-permeable polyurethane microporous membrane, which includes the following steps:

[0053] S1: Mix the resin with 70.8 parts of solvent and stir for 25 minutes...

Embodiment 3

[0058] The microporous membrane includes:

[0059] 20 parts of polyether polyurethane resin, 79.7 parts of solvent DMF, 0.2 part of AC blowing agent, 0.1 part of catalytic assistant ZnO;

[0060] The parts of the above components are all parts by mass, and the mass units used in each step are the same.

[0061] The polyether polyurethane resin is PU128 of Luoyang Jiming Chemical Co., Ltd.;

[0062] The solvent is Tianjin Fuchen Chemical Reagent Factory DMF;

[0063] The blowing agent is AC blowing agent of Jiangyin Moore Chemical New Material Co., Ltd.;

[0064] The catalytic promoter is ZnO from Tianjin Fuchen Chemical Reagent Factory;

[0065] The said release paper is a flat release paper, specifically a silicone release paper.

[0066] Correspondingly, the present invention also provides a method for preparing a waterproof and moisture-permeable polyurethane microporous membrane, which includes the following steps:

[0067] S1: Mix the resin with 79.4 parts of solvent and stir for 22 mi...

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Abstract

The invention discloses a dry-method preparing method for a polyurethane micro-porous film. The dry-method preparing method includes the following steps that a resin solution and a pore-foaming agent solution are stirred and mixed, and a glue solution is obtained; then release paper is coated with the glue solution with a filming device, drying is carried out for 8 min to 10 min, then the film is peeled, and the polyurethane micro-porous film is obtained. The resin solution is a polyether urethane resin solution; a pore-foaming agent is an AC foaming agent and a catalytic promoter ZnO. The dry-method preparing method is short in technology period, easy to operate and low in production cost, the ventilation performance, the moisture permeable performance and the waterproof performance of the polyurethane micro-porous film are effectively improved, and large-scale production can be achieved.

Description

Technical field [0001] The invention relates to a microporous membrane, and in particular to a dry preparation method and use of a waterproof and moisture-permeable polyurethane microporous membrane. Background technique [0002] As people's living standards improve, consumers have higher and higher requirements for the performance of clothing, shoes and bags. In particular, clothing for outdoor sports such as leisure travel must be rainproof, windproof, heat-insulating, cold-resistant, breathable, comfortable, and lightweight. and other special functions. The early waterproof coating process was to coat the surface of the fabric with a continuous plastic film that is impermeable and insoluble in water. Therefore, the fabric is impermeable and impermeable to sweat. Wearing a raincoat made of this kind of fabric will make people feel stuffy, so it is mainly Used to make tents, umbrellas and other supplies. Later, fabrics with the ability to exchange heat and moisture vapor ...

Claims

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Application Information

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IPC IPC(8): B01D71/60B01D69/02B01D67/00
CPCB01D71/60B01D67/0002B01D69/02B01D2325/24
Inventor 贺贝贝解一军习峥辉张娜周丹苏韵
Owner HEBEI UNIV OF TECH
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