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Lotus root starch-based water-absorbing breathable PU leather and preparation method thereof

A lotus root flour-based and lotus root flour technology, applied in the field of synthetic leather, can solve the problems of easy growth of microorganisms, poor water absorption and air permeability, poor water absorption and air permeability, etc., and achieves the effects of improving water absorption and air permeability, reducing the preparation cost, and making the price natural and environmentally friendly.

Active Publication Date: 2020-10-16
浙江旭川树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with microfiber leather and genuine leather, both dry-process polyurethane synthetic leather and wet-process polyurethane synthetic leather have the disadvantage of poor water absorption and air permeability.
Poor water absorption and air permeability make it easy to breed microorganisms inside polyurethane synthetic leather, which not only affects the service life of synthetic leather, but also adversely affects the health of users
The study found that adding a little polyethylene glycol in the synthesis of polyurethane can improve the water absorption and breathability of synthetic leather, but polyethylene glycol has poor hydrolysis resistance, which seriously affects the service life of synthetic leather.

Method used

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  • Lotus root starch-based water-absorbing breathable PU leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of lotus root powder-based filler:

[0029] Dissolve 30 g of dried lotus root starch in 75 g of absolute ethanol, ultrasonically disperse for 30 min, then add 11 g of citric acid, continue to disperse for 30 min, then add 600 g of ammonia water, filter after reaction, wash with deionized water, and finally in After drying in a vacuum drying oven at 65°C, the lotus root powder-based water-absorbing and breathable filler was obtained, which was pulverized for later use.

[0030] (2) Preparation of water-absorbing and breathable bass:

[0031] Mix 100g WS-8706 PU wet-process resin, 30g lignocellulose, 5g lotus root powder-based filler and 110g N,N-dimethylformamide (DMF), stir well, defoam, and then apply to suede , the coating thickness is 120 mm, and a water-absorbing and breathable bass is obtained.

[0032] (3) Preparation of water-absorbent and breathable PU leather:

[0033] First, dissolve 100g of dry-process resin DF-8030 in 50g of DMF solution a...

Embodiment 2

[0036] (1) Preparation of lotus root powder-based filler:

[0037] Dissolve 20 g of dried lotus root powder in 50 g of absolute ethanol, ultrasonically disperse for 30 min, then add 5 g of citric acid, continue to disperse for 30 min, then add 400 g of ammonia water, filter after reaction, wash with deionized water, and finally in After drying in a vacuum drying oven at 65°C, the lotus root powder-based water-absorbing and breathable filler was obtained, which was pulverized for later use.

[0038] (2) Preparation of water-absorbing and breathable bass:

[0039] Mix 70g WS-8706 PU wet-process resin, 10g lignocellulose, 1g lotus root powder-based filler and 90g N,N-dimethylformamide (DMF), stir well, defoam, and then apply to suede On the surface, the coating thickness is 100 mm, and a water-absorbing and breathable bass is obtained.

[0040] (3) Preparation of water-absorbent and breathable PU leather:

[0041] First, dissolve 100g of dry-process resin DF-8030 in 100g of DM...

Embodiment 3

[0044] (1) Preparation of lotus root powder-based filler:

[0045]Dissolve 40 g of dried lotus root powder in 100 g of absolute ethanol, ultrasonically disperse for 30 min, then add 15 g of citric acid, continue to disperse for 30 min, then add 800 g of ammonia water, filter after reaction, wash with deionized water, and finally in After drying in a vacuum drying oven at 65°C, the lotus root powder-based water-absorbing and breathable filler was obtained, which was pulverized for later use.

[0046] (2) Preparation of water-absorbing and breathable bass:

[0047] Mix 120g WS-8706 PU wet-process resin, 50g lignocellulose, 10g lotus root powder-based filler and 150g N,N-dimethylformamide (DMF), stir well, defoam, and then apply it on the suede , the coating thickness is 150 mm, and a water-absorbing and breathable bass is obtained.

[0048] (3) Preparation of water-absorbent and breathable PU leather:

[0049] First, dissolve 100g of dry-process resin DF-8030 in 200g of DMF s...

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Abstract

The invention provides lotus root starch-based water-absorbing breathable PU leather and a preparation method thereof, and belongs to the technical field of synthetic leather. The preparation method comprises the following steps: doping a lotus root starch-based filler into a PU wet resin system to prepare a water-absorbing breathable base, and respectively adhering an adhesive and a dry-method surface material to the surface of the water-absorbing breathable base to obtain the lotus root starch-based water-absorbing breathable PU leather. According to the invention, the water-absorbing breathable base, the dry-method surface material and a dry-method bottom material are ensured to have water-absorbing breathable performance; the prepared lotus root starch-based water-absorbing breathablePU leather has good water-absorbing breathable performance, the moisture permeability of the prepared lotus root starch-based water-absorbing breathable PU leather can reach 1759 g.m<-2>.24h<-1>, andthe water absorption time is 2.4 h.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a lotus root starch-based water-absorbing and breathable PU leather and a preparation method thereof. Background technique [0002] PU leather is a skin made of polyurethane. It has a soft, natural luster, soft feel, and a strong leather-like appearance. It has excellent mechanical properties such as excellent adhesion to the substrate, wear resistance, flex resistance, and aging resistance. It also has With the advantages of good cold resistance, breathability, washability, convenient processing, and low price, it is the most ideal substitute for natural leather and is widely used in clothing, bags, furniture and vehicle inner leather. [0003] The industrial production methods of polyurethane synthetic leather mainly include dry method and wet method. Compared with microfiber leather and real leather, both dry-process polyurethane synthetic leather and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14
CPCD06N3/14D06N3/0061D06N3/0097D06N3/0077D06N2209/123D06N2209/126D06N2211/28Y02P70/62
Inventor 管兵夏峰熊治海
Owner 浙江旭川树脂有限公司
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