Preparation method of pure water-based environment-friendly cow split luggage leather
An environmentally friendly, pure water-based technology, applied in leather drying, leather surface treatment, leather surface mechanical treatment, etc., can solve the problems of pollution to the environment, harm to the human body, and high energy consumption, save energy, save water, and reduce production. cost effect
Inactive Publication Date: 2020-08-04
SHANDONG TIANQING TECH DEV
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Problems solved by technology
[0002] Two-layer cowhide is the part left after the top layer of cowhide is taken out by mechanical cutting. Both sides of the two-layer leather are loose fiber structure. The traditional method of making luggage leather is: oily resin coating (containing a large amount of DMF), solidification, and water washing. , drying, and post-processing (embossing or veneering), this process produces a large amount of DMF and DMF-containing wastewater, which can be high, has a heavy smell, pollutes the environment, and is harmful to the human body
Method used
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[0027] Step 1: Accurately weigh 100g of polytetrahydrofuran, 33g of isocyanate, 0.05g of organic bismuth, 0.47g of trimethylolpropane, 2.3g of neopentyl glycol, 4g of dimethylolbutyric acid, 1.1g of dimethylolamine, piperazine 1.4g, acetone 30g, water 190g;
[0028] Step 2: Add tetrahydrofuran, isocyanate, and organic bismuth into the reaction kettle, raise the temperature to 90°C at a stirring speed of 300r / min, and react for 2h;
[0029] Step 3: Cool down to 80°C, add trimethylolpropane, neopentyl glycol dimethylol butyrate, and acetone, and react for 3 hours at a stirring speed of 300r / min;
[0030] Step 4: Cool down to 50°C, add dimethylethanolamine, increase the stirring speed to 1400r / min, add water to emulsify, after the phase inversion of the emulsion, add piperazine and reduce the stirring speed to 200r / min, and react for 0.5h;
[0031] Step 5: Raise the temperature to 60°C for 2 hours to remove acetone, cool down to room temperature, and discharge to obtain a water-...
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The invention relates to a preparation method of pure water-based environment-friendly cow split luggage leather. The method comprises the following steps: 1, putting water-based resin, ammonium stearate and water-based color paste into a foaming kettle, performing foaming operation under the condition of a stirring rotating speed of 700r / min, adding a thickening agent when the volume of the mixture is 1.5 times of the original volume, adjusting the viscosity, stopping adjusting the viscosity when the viscosity is adjusted to 5000mpa. S, and continuously stirring for 5min to obtain slurry; 2,coating the surface of two-layer cow leather with the slurry in a roll coating manner; 3, feeding the two-layer cow leather coated with the slurry into a drying machine to be dried to obtain a primary leather product, wherein the drying time is 15 min; and 4, carrying out embossing operation on the leather primary product for 3 seconds under the conditions that the temperature is 120 DEG C and the pressure is 15MPa so as to obtain the cow split luggage leather finished product. Waste water is not generated, and the prepared split leather luggage leather is good in hand feeling, resistant to abrasion and aging, long in service life and convenient to use in life, production and use.
Description
technical field [0001] The invention belongs to the field of preparation of two-layer cowhide luggage leather, in particular to a preparation method of pure water-based environment-friendly two-layer cowhide luggage leather. Background technique [0002] Two-layer cowhide is the part left after the top layer of cowhide is taken out by mechanical cutting. Both sides of the two-layer leather are loose fiber structure. The traditional method of making luggage leather is: oily resin coating (containing a large amount of DMF), solidification, and water washing. , drying, and post-processing (embossing or veneering), this process produces a large amount of DMF and DMF-containing wastewater, which can be high in alcohol, heavy in smell, pollutes the environment, and is harmful to the human body. Contents of the invention [0003] The invention provides a preparation method of pure water-based environment-friendly two-layer cowhide luggage leather, which is used to solve the defec...
Claims
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Login to View More IPC IPC(8): C14C11/00C14B1/56C14B1/58C08G18/32C08G18/34C08G18/48C08G18/66
CPCC08G18/3206C08G18/3246C08G18/348C08G18/4854C08G18/6674C08G18/6677C08G18/6685C08G18/6692C14B1/56C14B1/58C14C11/00C14C11/003
Inventor 陈玉国宁继鑫刘娅林胡文翠徐旭东张留成郭翠娟刘文峰纪春玲
Owner SHANDONG TIANQING TECH DEV