Chinese medicine slag filling non woven composite material and preparation thereof
A technology of composite materials and filling materials, applied in the direction of non-woven fabrics, textiles, papermaking, layered products, etc., can solve the problems of limited effective nutrients, high crude fiber content of traditional Chinese medicine dregs, and no large-scale promotion. High production efficiency, low selectivity, and the effect of meeting the requirements of life, health and safety
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Embodiment 1
[0025] The ethylene-vinyl alcohol copolymer is selected as the hot-melt powder, and its melting point range is 100-130°C. The specifications of the fiber web are: viscose fiber is selected as the raw material, and its average length is 38.68 mm. The short fiber is carded into a web, the fiber is loosened, and the fiber is carded on a cover carding machine. The number of times of carding is two times. Change the direction of the fiber web and obtain an isotropic fiber web according to the principle of cross-lapping. The surface density of the fiber web is 102.7kg / m 2 .
[0026] Evenly sprayed hot melt powder and traditional Chinese medicine slag powder, the addition amount of hot melt powder is 20%, and the addition amount of traditional Chinese medicine slag powder is 40%, to make a sandwich composite structure.
[0027] Put the obtained sandwich composite structure into a flat vulcanizing machine at a temperature of 135°C and a pressure of 11.5MPa, and heat and press for 1.5...
Embodiment 2
[0029] The ethylene-vinyl alcohol copolymer is selected as the hot-melt powder, and its melting point range is 100-130°C. The specifications of the fiber web are: waste polyester fiber is used as raw material, the average length is 38mm, and the cross-lapping method of short fiber carding is used to obtain a fiber web with an area density of 200kg / m 2 .
[0030] The hot-melt powder and traditional Chinese medicine slag powder are evenly sprayed, the addition amount of the hot-melt powder is 40%, and the addition amount of the traditional Chinese medicine slag powder is 20%, and a sandwich composite structure is made.
[0031] Put the obtained sandwich composite structure into a flat vulcanizing machine at a temperature of 135° C., a pressure of 10 MPa, and a time of 2 minutes to preform the material. After the material is taken out and cooled, it is impregnated with a 30% epoxy resin solution, wherein the ratio of epoxy resin, curing agent and acetone is 100:80:75, and the im...
Embodiment 3
[0033] Ethylene-vinyl acetate copolymer is selected as the hot-melt powder, and its melting point range is 70-100°C. The selected surface density is 100kg / m 2 The spun-bonded polypropylene nonwoven material is used as the base fabric, and 8% hot-melt powder and 35% traditional Chinese medicine slag powder are evenly sprinkled in the middle of the four-layer nonwoven fabric to make a multi-layer composite structure material.
[0034] Put the obtained composite structural material into a flat vulcanizing machine at a temperature of up to 90° C., and hold the pressure for 3 minutes at a pressure of 3 MPa to preform the material. After the material is taken out and cooled, it is impregnated with 25% epoxy resin solution, wherein the ratio of epoxy resin, curing agent and acetone is 100:80:75, and the impregnated material is placed in a flat vulcanizer at a temperature of 120°C. The pressure is 4 MPa, and the time is 50 minutes, and the non-woven composite material filled with tra...
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