Method for filling and synthetizing full waterborne polyurethane base leather through nano attapulgite

A polyurethane leather bass and nano attapulgite technology, applied in textiles and papermaking, etc., can solve the problems of insufficient nano reinforcement performance, low production efficiency, dispersion and dissociation, etc., and achieve easy mass production and stable performance. , Good thickening effect

Inactive Publication Date: 2015-06-24
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102634242 proposes a method for modifying halloysite nanotubes and compounding them with water-based polyurethane to prepare composite materials, using silane coupling agent to modify and purify halloysite nanotubes, and then compounding with water-based polyurethane to prepare composite materials, which significantly improves the material high tensile strength and glass transition temperature, but in the preparation, it is necessary to disperse halloysite at a low concentration in an organic solvent to modify it, resulting in low production efficiency and high energy consumption, complicated process, and unfavorable for environmental protection
Chinese patent CN102838870A proposes a soybean oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1: Using non-woven fabric as the base fabric, impregnating it in 15wt% NaCl aqueous solution, the liquid rate of the base fabric after impregnation is 35wt%, and the coating amount is 800g / m 3 ; Dry and iron the impregnated base cloth, and then calender the surface; 15 grams of attapulgite content of 45wt%, montmorillonite content of 40wt% montmorillonite attapulgite crushed to more than 200 mesh, add 100wt% water infiltration for 24h , Squeeze on the roller 5 times, after aging for 12 hours, add 100 grams of anionic waterborne polyurethane 8000rpm high-speed pre-dispersion for 30min, then add 7 grams of sodium stearate, 4 grams of amine stearate, 4 grams of water-based pigment paste at 6000rpm high speed Stir for 20 minutes to prepare a water-based polyurethane synthetic leather slurry; immerse the pretreated base fabric in the water-based polyurethane synthetic leather slurry, scrape the surface, and dry to prepare a water-based polyurethane synthetic leather bas...

Example Embodiment

[0019] Example 2: Using non-woven fabric as the base fabric, impregnating it in 5wt% NaCl aqueous solution, the liquid rate of the base fabric after impregnation is 15wt%, and the coating amount is 400g / m 3 ; Dry and iron the impregnated base cloth, and then calender the surface; 12 grams of dolomite attapulgite with 25wt% attapulgite content and 60wt% dolomite content is crushed to more than 250 meshes, and 50wt% water is added to infiltrate for 12h. Roll squeeze 3 times, after aging for 4h, add 100g of anionic waterborne polyurethane at 10000rpm high speed pre-dispersing for 30min, then add 3g of sodium dodecylbenzene sulfonate, 2g of amine stearate, 1g of water-based pigment paste Stir at a high speed at 8000 rpm for 20 minutes to prepare a water-based polyurethane synthetic leather slurry; immerse the pre-treated base fabric in the water-based polyurethane synthetic leather slurry, scrape the surface, and dry to prepare a water-based polyurethane synthetic leather bass.

Example Embodiment

[0020] Example 3: Use non-woven fabric as the base fabric and impregnate it in a 10wt% NaCl aqueous solution. The liquid rate of the base fabric after impregnation is 25wt%, and the coating amount is 600g / m 3 ; Dry and iron the impregnated base cloth, and then calender the surface; 8 grams of high-viscosity attapulgite with 70wt% attapulgite content is crushed to more than 300 mesh, add 75wt% water to soak for 18h, and squeeze the roller 4 times After aging for 8 hours, add 100 grams of anionic water-based polyurethane pre-dispersed at 8000 rpm for 30 minutes, and then add 5 grams of sodium stearate, 3 grams of sodium succinate, and 2.5 grams of water-based pigment paste. Stir at 6000 rpm for 20 minutes to make water-based polyurethane synthetic leather. Slurry: The pretreated base cloth is immersed in the water-based polyurethane synthetic leather slurry, the surface is leveled, and dried to prepare the water-based polyurethane synthetic leather bass.

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PUM

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Abstract

The invention discloses a method for filling and synthetizing full waterborne polyurethane base leather through nano attapulgite. The method includes adopting non woven fabrics as the base fabric, and soaking the non woven fabric in NaCl water solution; drying and ironing the soaked base fabric, and calendering the surface; adopting attapulgite as raw material, smashing, soaking in water, extruding through opposite rollers, aging and adding anionic waterborne polyurethane for high speed pre-dispersion; adding foaming agent, foam stabilizing agent and aqueous colorant sequentially, mixing at high speed, and obtaining waterborne polyurethane synthesis leather slurry; soaking the pretreated base fabric in the waterborne polyurethane synthesis leather slurry, scraping the surface, drying, and obtaining the waterborne polyurethane base leather. The attapulgite filler is low in cost and easy to prepare, the synergistic reinforcement effect of fibrillar attapulgite and associated minerals is played completely, the mechanical property of the synthesis base leather is improved effectively, organic solvent is omitted during production, safety and environment protection can be achieved, the process is easy and simple to implement, and large-scale production is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of preparation of water-based polyurethane leather, and in particular relates to a method for filling and synthesizing all-water-based polyurethane leather by filling nano-attapulgite clay. Background technique [0002] Polyurethane leather has the appearance of soft luster, natural, soft touch and strong genuine leather feeling. It also has the advantages of warmth, breathability and simple production process. It is widely used in clothing, shoemaking, automobiles, bags, furniture and other industries. The polyurethane resin used in the traditional polyurethane leather production and the wet tanning production process all need to use a large amount of organic solvents. These solvents are flammable and explosive, with large toxic and side effects, which not only pollute the environment, but also threaten human life and health. In recent years, as the country has higher and higher requirements for environment...

Claims

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Application Information

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IPC IPC(8): D06N3/14C08L75/04C08K3/34
Inventor 倪伶俐陈权王福才金叶玲陈静丁师杰
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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