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PU dry-process foaming synthetic leather and preparation method thereof

A technology of synthetic leather and dry process, which is applied in the field of synthetic leather to achieve the effect of strong covering ability, excellent foaming performance and soft hand feeling

Active Publication Date: 2019-01-22
福建华普树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current dry-process synthetic leather in the market is mostly directly bonded on the leather production line through a two-knife process, similar to fabric coating, which feels light and dry, and is subject to many restrictions in use

Method used

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  • PU dry-process foaming synthetic leather and preparation method thereof
  • PU dry-process foaming synthetic leather and preparation method thereof
  • PU dry-process foaming synthetic leather and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0026] The invention provides a kind of preparation method of PU dry method foaming synthetic leather, comprises the following steps:

[0027] (1) Mix and stir the raw materials of the foaming layer until foaming to obtain a foaming material; the raw materials of the foaming layer include the following components by weight:

[0028]

[0029] mixing the surface layer raw materials to obtain the surface layer material;

[0030] mixing the base material to obtain the base material;

[0031] (2) Carry out the first drying after coating the surface material on one side of the release paper, and form a surface layer on the surface of the release paper;

[0032] (3) Carry out the second drying after the foam material is coated on the surface layer surface, and form a foam layer on the surface layer surface;

[0033] (4) Carry out the third drying after coating the base material on the surface of the foam layer, dry the base material until it is semi-dry, and then attach the base...

Embodiment 1

[0053] (1) Mix and stir the foam layer raw materials until foaming to obtain foam material, the foam ratio is 1.1, keep stirring continuously during the production process, the stirring speed is 500r / min; the foam layer raw materials include the following weight Serving composition:

[0054]

[0055] The surface layer raw materials are mixed to obtain the surface layer material; the surface layer material comprises the following components by weight:

[0056]

[0057] The base material is mixed to obtain the base material; the base material includes the following components by weight:

[0058]

[0059]

[0060] (2) Put the release paper, coat the surface layer material 0.1mm on the release paper, and then dry it in an oven at 110°C to form a surface layer on the surface of the release paper;

[0061] (3) Coat 0.4mm of foaming material on the surface of the surface layer, then dry it in an oven at 120°C to form a foaming layer on the surface of the surface layer; ...

Embodiment 2

[0065] (1) Mix and stir the foam layer raw materials until foaming, to obtain foam material, the foam ratio is 1.2, keep stirring continuously during the production process, the stirring speed is 600r / min; the foam layer raw materials include the following weight Serving composition:

[0066]

[0067] The surface layer raw materials are mixed to obtain the surface layer material; the surface layer material comprises the following components by weight:

[0068]

[0069] The base material is mixed to obtain the base material; the base material includes the following components by weight:

[0070]

[0071]

[0072] (2) Put the release paper, coat the surface layer material 0.1mm on the release paper, then dry it in an oven at 120°C, and form a surface layer on the upper surface of the release paper;

[0073] (3) Coat 0.4mm of foaming material on the surface of the surface layer, then dry it in an oven at 125°C to form a foaming layer on the upper surface of the surfa...

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Abstract

The invention provides PU dry-process foaming synthetic leather and a preparation method thereof and belongs to the field of synthetic leather. The preparation method of the PU dry-process foaming synthetic leather comprises the following steps: firstly preparing a foaming material, a surface layer material and a bottom layer material; then successively coating release paper with a surface layer,a foaming layer and a bottom layer one by one, wherein foaming resin used by the foaming layer is HP-3012S foaming resin; the resin is excellent in foaming performance and high in capability of coating air; the prepared synthetic leather is soft in hand feeling and excellent in physical property; the foaming manner of the foaming material is physical foaming; the air is dissolved in the material by stirring; through cutting of stirring blades, the volume of bubbles is gradually reduced and generates uniformity; the defective leather surface phenomena such as pinhole depressions generated by non-uniform size of the bubbles is avoided; diluents used in the surface layer, the foaming layer and the bottom layer are all organic solvents; the precedent that oily polyurethane is used in the fieldof foaming synthetic leather is created; a new type of leather fabric is added in clothing leather and sofa leather.

Description

technical field [0001] The invention relates to the technical field of synthetic leather, in particular to a PU dry-process foamed synthetic leather and a preparation method thereof. Background technique [0002] Synthetic leather, also known as artificial leather, can be divided into PVC synthetic leather and PU synthetic leather according to the type of surface resin, of which PU synthetic leather is the most widely used. Synthetic leather is more and more widely used in clothing, sports shoes, luggage and other fields, replacing natural leather with insufficient resources in large quantities, which largely compensates for the impact of the scarcity of animal skin on related manufacturing industries. [0003] The industrial production methods of polyurethane (PU) synthetic leather mainly include dry method and wet method. The current dry-process synthetic leather in the market is mostly directly bonded on the leather production line through a two-knife process, which is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14
CPCD06N3/0047D06N3/0077D06N3/0097D06N3/145D06N2209/1642D06N2211/10D06N2211/14D06N2211/28D06N2213/02D06N2213/03
Inventor 盛海波叶秋星李小玉叶骑虎叶骑龙蒋功彬
Owner 福建华普树脂有限公司