Waterborne polyurethane composite leather and preparation method thereof

A water-based polyurethane and polyurethane technology, which is applied in textiles and papermaking, can solve the problems of large fluctuations in product performance, inability to meet high-strength requirements, and high manufacturing costs.

Pending Publication Date: 2020-10-23
SEIREN SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the water-based polyurethane product is environmentally friendly and solvent-free synthetic leather is suitable for car interior decoration, but its production process and processing methods often have problems such as unstable quality during processing, large fluctuations in product performance, and inability to meet high-strength requirements, resulting in high manufacturing costs.

Method used

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  • Waterborne polyurethane composite leather and preparation method thereof
  • Waterborne polyurethane composite leather and preparation method thereof
  • Waterborne polyurethane composite leather and preparation method thereof

Examples

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preparation example Construction

[0043]The present invention provides a water-based polyurethane composite leather and a preparation method thereof. The water-based polyurethane composite leather includes a leather blank 5 and a surface treatment layer 4. The leather blank 5 includes a base cloth layer 1, an adhesive layer 2 and a surface layer 3. An adhesive layer 2 and a surface treatment layer 4 coated on the surface layer 3 are arranged between the base cloth layer 1 and the surface layer 3 .

[0044] As a further improvement, the surface treatment layer 4 includes polyurethane, bridging agent, tackifier and smoothing agent; the mass percentage of each material component of the surface treatment layer 4 is: polyurethane 88.7% ~ 90.7%, bridging agent 1.7% ~3.7%, tackifier 0.5%~1.5%, smoothing agent 6.1%~8.1%; bridging agent is multifunctional carbodiimide polymer, tackifier is basic tackifier, such as acrylic polymer; The smoothing agent is silicon-based and its silicon polymer.

[0045] The surface layer...

Embodiment 1

[0059] A kind of water-based polyurethane composite leather provided by the present embodiment and preparation method thereof,

[0060] First prepare the release paper mold and the base cloth layer; the production environment temperature is 0°C to 40°C, and the production environment humidity is 20% to 80%;

[0061] S1 surface layer is made, according to each material component of this surface layer 3, select mass percent to be 57.4% polyurethane, 2.8% bridging agent carbodiimide, 3.0% basic tackifier, 13.9% inorganic pigment iron oxide and carbon The surface layer solution is prepared with black, and the balance is water as the dissolution medium; the stirring speed of the prepared surface layer solution is 720rpm to 880rpm, and the stirring time is 60min to 65min, so that the viscosity of the surface layer solution is 4800cps; the surface layer solution is fully degassed. , the processing time is 60min~65min; the speed of surface layer solution coating processing is 9m / min, ...

Embodiment 2

[0069] Another water-based polyurethane composite leather and preparation method thereof provided in this embodiment differ from Example 1 in that:

[0070] S1 surface layer is made, according to each material component of this surface layer 3, select mass percentage to be 50.4% polyurethane, 1.7% bridging agent carbodiimide, 8.0% basic tackifier, 16.5% inorganic pigment iron oxide and carbon The surface layer solution is prepared with black, and the balance is water as the dissolution medium; the stirring speed of the prepared surface layer solution is 720rpm to 880rpm, and the stirring time is 60min to 65min, so that the viscosity of the surface layer solution is 4500cps; the surface layer solution is fully degassed , the processing time is 60min~65min; the speed of surface layer solution coating processing is 11m / min, and the usage amount is 75g / m 2 ~125g / m 2 ; The surface layer is dried and molded at a temperature of 100°C to 125°C for 2.5 minutes.

[0071] S2 Adhesive l...

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Abstract

The invention provides waterborne polyurethane composite leather. The waterborne polyurethane composite leather comprises a base cloth layer, an adhesion layer, a surface layer and a surface treatmentlayer, wherein the surface treatment layer comprises polyurethane, a bridging agent, a tackifier and a smoothing agent, the surface layer comprises polyurethane, a bridging agent, a tackifier, a pigment and a dissolving medium, and the adhesion layer comprises polyurethane, a hardening agent, a catalyst, a solvent, a flame retardant and a pigment. The invention further provides a preparation method of the composite leather. The preparation method comprises the steps of manufacturing the surface layer, manufacturing the adhesion layer, bonding the surface layer, the adhesion layer and the basecloth layer together, carrying out stripping, carrying out curing treatment, treating the surface layer and the like. According to the waterborne polyurethane composite leather and the preparation method thereof, the surface layer of the waterborne polyurethane composite leather can enhance surface film formation, abrasion resistance and flexibility by improving the components of all the layers and adopting the preparation method; and meanwhile, various strengths such as abrasion resistance, breaking property, tension and cracking of the waterborne polyurethane composite leather are enhanced,and the phenomena of peeling, cracking and the like of a product after long-term solarization are avoided.

Description

technical field [0001] The invention relates to the technical field of polyurethane composite materials, in particular to a water-based polyurethane composite leather and a preparation method of the composite leather. Background technique [0002] Polyurethane material (Polyurethane, abbreviated as PU) is the abbreviation of polyurethane, which is a new kind of organic polymer material, which is widely used in many fields of national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation and so on. Polyurethane materials are used as leather finishing agents, artificial leather, synthetic leather coatings, and inner and outer soles of shoes. They have many advantages: low density, soft texture, comfortable and light to wear; good dimensional stability and long storage life; excellent wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/145D06N3/0097D06N3/0077D06N3/0059D06N3/0061D06N2211/28D06N2209/1678
Inventor 胡超群
Owner SEIREN SUZHOU CO LTD
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