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A kind of preparation technology of multi-layer composite automobile leather
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A multi-layer composite and preparation process technology, applied in the direction of coating, lamination, layered products, etc., can solve the problems of lack of barrier protection, leather aging, easy to be sunburned, etc., to increase protection and sun protection, The effect of improving aging resistance and good sunscreen performance
Active Publication Date: 2021-12-10
YANGZHOU DERWINS PLASTICS TECH
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Problems solved by technology
Automotive interiors, such as steering wheel covers, leather seats, floor mats, etc., are one of the major applications of leather. However, because the car is exposed to the external environment for a long time, especially in the hot summer, automotive leather products are usually directly exposed to sunlight. In the middle, there is no barrier protection of clothing or shelters, and it is easy to be sunburned. Over time, it will lead to aging phenomena of leather, such as cracking, chalking or fading
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment 1
[0031] see figure 1 Shown, the preparation method of sunscreen is:
[0032] S1. Add 0.23mol 2-amidinoacetate methyl ester hydrochloride, 10mmol sodium tert-butoxide and 1L solvent dioxane into the reaction kettle, replace the air in the reaction kettle with nitrogen gas, and add 0.1mol o-hydroxyl Benzaldehyde, heat up to 105°C and reflux while stirring, and continue to reflux for 2.5-3h. After the reaction, cool to room temperature, use a rotary evaporator to remove the solvent, and separate and purify by column chromatography. The chromatographic solution is petroleum ether: dichloro Methane: ethyl acetate = 10:1:3, to obtain intermediate A;
[0033] S2, the intermediate A prepared in step S1, 0.22mol 1-(2-pyrimidinyl)-4-hydroxypiperidine, 20g catalyst (sulfamic acid: zirconium tungstate mass ratio=4:1) and 1L solvent Add toluene into the reaction kettle, feed nitrogen to replace the air in the reaction kettle, raise the temperature to 115°C and reflux, and continue the ref...
Embodiment 2
[0036] The sunscreen lotion includes the following raw materials by weight: 7g of acrylate, 5g of fatty alcohol polyoxyethylene ether, 2g of sodium acetate, 1g of olive oil, 7g of sunscreen, 8g of polydimethylsiloxane, 20g of propylene glycol, and 100g of deionized water;
[0037] The preparation method of sunscreen lotion is:
[0038] (1) Add acrylate, fatty alcohol polyoxyethylene ether, sodium acetate, and deionized water into a mixer and stir to obtain A emulsion;
[0039] (2) Olive oil, sunscreen, propylene glycol are joined in another blender and stirred evenly to obtain B emulsion;
[0040] (3) Place emulsion A in a water bath at a temperature of 40°C, and add emulsion B to emulsion A dropwise while stirring. After the dropwise addition, cool down to 30°C and continue stirring for 5 hours to obtain a sunscreen emulsion.
Embodiment 3
[0042] The sunscreen lotion includes the following raw materials by weight: acrylate 10g, fatty alcohol polyoxyethylene ether 4g, sodium acetate 1.5g, olive oil 2g, sunscreen 9.5g, polydimethylsiloxane 7g, propylene glycol 25g, deionized water 100g ;
[0043] The preparation method of sunscreen lotion is:
[0044] (1) Add acrylate, fatty alcohol polyoxyethylene ether, sodium acetate, and deionized water into a mixer and stir to obtain A emulsion;
[0045] (2) Olive oil, sunscreen, propylene glycol are joined in another blender and stirred evenly to obtain B emulsion;
[0046](3) Place emulsion A in a water bath at a temperature of 45°C, and add emulsion B to emulsion A dropwise while stirring. After the dropwise addition, cool down to 30°C and continue stirring for 5 hours to obtain a sunscreen emulsion.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses a preparation process of a multi-layer composite automobile leather. The automobile leather consists of a sunscreen coating layer, a leather layer, a non-woven fabric layer, a glue-free cotton layer and a knitted fabric layer from the outside to the inside. The preparation process is as follows: in the first step, the dry skin or salt skin is depilated, degreased, softened and pickled to obtain skin collagen fibers, and the skin collagen fibers are tanned, dyed, washed, drummed, mounted, vacuum-dried, and ready to use. The leather is obtained; in the second step, the sunscreen lotion is evenly sprayed on the surface of the leather prepared in the first step by spraying, and then heated and shaped to obtain the leather containing the sunscreen coating layer; in the third step, the sunscreen lotion prepared in the second step is Leather with sunscreen coating layer, non-woven fabric, non-glued cotton, and knitted fabric are stacked in sequence, and multi-layer composite automobile leather is obtained after pressing, sewing, and trimming. The sunscreen lotion is evenly sprayed on the surface by spraying. The leather surface increases the protection and sun protection of the leather, and improves the aging resistance of the car leather.
Description
technical field [0001] The invention belongs to the technical field of leather production, in particular to a preparation process of multilayer composite automobile leather. Background technique [0002] Leather is denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Leather is composed of natural protein fibers tightly woven in three-dimensional space. There is a special grain layer on the surface, which has natural grain and luster, and feels comfortable. Automotive interiors, such as steering wheel covers, leather seats, floor mats, etc., are one of the major applications of leather. However, because the car is exposed to the external environment for a long time, especially in the hot summer, automotive leather products are usually directly exposed to sunlight. Without the barrier protection of clothing or shelters, it is easy to be sunburned. Over time, it will lead to aging phenomena of leather, such...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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