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A kind of preparation method of water-based polyurethane foam slurry for synthetic leather

A technology of water-based polyurethane and foaming pulp, applied in the field of synthetic leather, can solve problems such as cognition, and achieve the effects of uniform size of bubbles, low cost of raw materials and stable structure

Active Publication Date: 2016-04-20
LIDA TECH FUJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the application principle and research status of the micro-bubble generator, there is no relevant record of applying the micro-bubble generator to the preparation of water-based polyurethane foam slurry for synthetic leather, and the bubble diameter of the foam slurry for synthetic leather only needs to be larger than 100 microns and use air, and micro-bubble generators have been able to flush bubbles with a diameter of 100 microns into the liquid at the end of the last century. The foaming problem of leather water-based polyurethane foaming slurry has not been recognized by those skilled in the art

Method used

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  • A kind of preparation method of water-based polyurethane foam slurry for synthetic leather
  • A kind of preparation method of water-based polyurethane foam slurry for synthetic leather
  • A kind of preparation method of water-based polyurethane foam slurry for synthetic leather

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preparation example Construction

[0018] Specifically, the preparation method of the synthetic leather water-based polyurethane foam slurry provided by the invention includes:

[0019] Step 1, mix 100 parts by weight of water-based polyurethane emulsion, 0.1-1 parts by weight of water-based thickener, 1-3 parts by weight of surfactant, 1-3 parts by weight of wetting agent and 0.1-2 parts by weight of fluid The leveling agent is mixed and prepared into a slurry;

[0020] Step 2. Pre-mix the prepared slurry with a high-speed mixer. The pre-mixing process is: first stir at 500-700 rpm for 1-5 minutes, control the viscosity of the slurry to 3000-5000mPa·s, and then adjust the rotation speed to 1300 -1400 rpm, continue to stir for 10-15 minutes, beat all the slurry into foam (until the water is invisible), and control the foaming ratio at 1-1.5;

[0021] Step 3. Start the micro-bubble generator to generate micro-bubbles of 100-300 microns, then pass the micro-bubbles into the pre-mixed slurry, and continuously ven...

Embodiment 1

[0041] (1) preparation slurry: with the aqueous polyurethane emulsion of 100 weight parts, the water-based thickener of 0.5 weight part, the tensio-active agent of 1 weight part, the wetting agent of 1 weight part and the leveling agent of 0.5 weight part, mix Evenly prepared into slurry;

[0042] (2) Pre-mixing: adjust the speed of the high-speed mixer to 500 rpm, stir the prepared slurry with a high-speed mixer for 5 minutes, adjust the viscosity of the slurry to 3000mPa s, adjust the speed of the high-speed mixer to 1400 rpm, continue Stir for 10 minutes, beat the slurry into foam (until the water is invisible), and control the foaming ratio to 1;

[0043] (3) Start the micro-bubble generator to generate micro-bubbles of 100-300 microns, then pass the micro-bubbles into the pre-mixed slurry, and ventilate continuously for 15 minutes to obtain synthetic leather with a bubble diameter of 100-300 microns Water-based polyurethane foam slurry.

Embodiment 2

[0045] (1) preparation slurry: the water-based polyurethane emulsion of 100 parts by weight, the water-based thickener of 0.1 part by weight, the tensio-active agent of 3 parts by weight, the wetting agent of 3 parts by weight and the leveling agent of 0.1 part by weight are mixed Evenly prepared into slurry;

[0046](2) Pre-mixing: adjust the speed of the high-speed mixer to 700 rpm, stir the prepared slurry with a high-speed mixer for 5 minutes, adjust the viscosity of the slurry to 5000mPa s, adjust the speed of the high-speed mixer to 1400 rpm, continue Stir for 10 minutes, beat the slurry into foam (until the water is invisible), and control the foaming ratio to 1.5;

[0047] (3) Start the micro-bubble generator to generate micro-bubbles of 100-300 microns, then pass the micro-bubbles into the pre-mixed slurry, and ventilate continuously for 20 minutes to obtain synthetic leather with a bubble diameter of 100-300 microns Water-based polyurethane foam slurry.

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Abstract

The invention relates to the technical field of synthetic leather, and particularly relates to a preparation method of water-based polyurethane foam slurry for synthetic leather, which aims to a preparation method by which air bubbles are compact, uniform and stable, and raw materials are low in cost. By adopting the combined foaming mode of premixing of a high-speed mixer and foaming of a micro air bubble generator, the diameters of the air bubbles of the water-based polyurethane foam slurry for the synthetic leather can reach 100-300 microns; the air bubbles are fine, uniform and consistent in size and is good in stability; any mechanical motion part is not provided in the whole preparation process, the preparation method is high in reliability, and is low in running cost; by testing, the air bubble persistence time of the water-based polyurethane foam slurry prepared by the invention can reach 8-10 hours, and the water-based polyurethane foam slurry can be cured and molded under the condition of 120-140 DEG C; the foaming layer prepared from the water-based polyurethane foam slurry is stable, compact and regular in air bubble structure, has no obvious thick and big bubble holes in the surface, is flawless in appearance, and can be widely applied to artificial leather products of clothing leather, balenciagasand leather, luggage leather and the like.

Description

technical field [0001] The invention relates to the technical field of synthetic leather, in particular to a method for preparing a water-based polyurethane foam slurry for synthetic leather. Background technique [0002] Foaming technology has always been one of the key technologies restricting the development of waterborne polyurethane in the synthetic leather application industry. The existing foaming slurry for synthetic leather usually adopts chemical foaming or physical foaming. Chemical foaming cannot be applied to water-based polyurethane systems due to the high chemical decomposition temperature of the foaming agent and its insolubility in water, so it is not suitable for the preparation of water-based polyurethane foaming slurry; although physical foaming can be applied to water-based polyurethane systems, but The existing more commonly used method is to use a foaming machine for foaming. The diameter of the generated bubbles is large, the uniformity and stability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0047D06N3/0056D06N3/0065
Inventor 庄昌清林芙蓉张国国陈炳琪陈金章陈瑞来王艳英陈尚泰阮宜课黄建国张丽敏
Owner LIDA TECH FUJIAN
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