Paper-plastic composite material and preparation method thereof

A composite material, paper-plastic technology, applied in paper coating, synthetic cellulose/non-cellulose material pulp/paper, papermaking, etc., can solve the problem that plastic bags are not easy to degrade, and the mechanical strength of paper-plastic composite plastic bags is not as good as that of plastic bags , affecting the health of users and other issues

Inactive Publication Date: 2017-12-01
ANHUI YUEERWEI PLASTIC MACHINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although paper plastic bags are environmentally friendly, they are far inferior to plastic bags in terms of mechanical strength and durability. physical health
Plastic bags are also widely used due to their waterproof, high mechanical strength and light weight, but plastic bags have disadvantages such as not easy to degrade, which limits their further use.
[0003] But at present, the preparation process of the paper-plastic composite material used to prepare the paper-plastic composite plastic bag is complicated, the cost is high, and the strength of the paper-plastic composite material is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0011] The invention provides a preparation method of paper-plastic composite material, comprising:

[0012] 1) Mix and cook raw wood pulp, bark, hemp, straw, glass fiber, inorganic filler and lime water according to the weight ratio of 100:20-30:1-5:5-15:15-25:200-300 to obtain pulp; washing, blanching, dredging, scooping, squeezing and baking the pulp to obtain composite paper;

[0013] 2) heating the low-density polyethylene film and coating it on the surface of the composite paper to form a plastic layer to obtain a paper-plastic composite material.

[0014] In the above technical solution, the type of the inorganic filler and its preparation method can be selected in a wide range, but in order to further improve the strength of the composite paper prepared, preferably, the inorganic filler is prepared by the following method : kaolin, mixing chitin fiber, bamboo fiber, ceramic fiber, starch, hydrotalcite, diatomite, and yttrium, heat treatment, grinding and sieving to pr...

preparation example 1

[0024] Kaolin, chitin fiber (extracted from the shell of shrimp, crab, snail and centipede mixed in the shell at a weight ratio of 1:1:1:2), bamboo fiber, ceramic fiber, starch (mung bean starch, tapioca starch, Sweet potato starch and corn starch are mixed according to the weight ratio of 1:1:2:1), hydrotalcite, diatomaceous earth and yttrium are mixed according to the weight ratio of 100:5:1:3:5:1:2:0.5; , under a nitrogen atmosphere, the temperature was raised from room temperature to 700°C and maintained at 700°C for 1 hour, wherein the heating rate was 10°C / min; then the temperature was lowered to 100°C at a cooling rate of 10°C / min and then directly cooled with water; finally, Grind and sieve to obtain the inorganic filler with an average particle size of 400 μm; denoted as W1.

preparation example 2

[0026] Kaolin, chitin fiber (extracted from the shells of shrimps, crabs, locusts, snails and centipedes mixed in the shells in a weight ratio of 1:1:1:2:1), bamboo fibers, ceramic fibers, starch (sweet potato starch , sweet potato starch, potato starch, wheat starch, water chestnut starch, lotus root starch and corn starch are mixed according to the weight ratio of 1:1:2:1:1:1:1), hydrotalcite, diatomaceous earth and yttrium according to 100: Mix at a weight ratio of 8:3:4:8:3:7:0.8; then, under a nitrogen atmosphere, start heating from room temperature to 750°C and maintain at 750°C for 1 hour, wherein the heating rate is 15°C / min; Then, the temperature was lowered to 150°C at a cooling rate of 15°C / min, and then water-cooled directly; finally, the inorganic filler with an average particle size of 450 μm was obtained by grinding and sieving; denoted as W2.

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Abstract

The invention discloses a paper-plastic composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing raw wood pulp, bark, hemp, straws, glass fibers, an inorganic filler and whitewash according to the weight ratio of 100 to (20 to 30) to (1 to 5) to (2 to 5) to (5 to 15) to (15 to 25) to (200 to 300), and then cooking to prepare paper pulp; washing, blenching and knocking the paper pulp, fishing paper, drying and baking paper to obtain composite paper; secondly, heating a low-density polyethylene film and then coating the surface of the composite paper with the film to form a plastic layer, thus obtaining the paper-plastic composite material. The paper-plastic composite material has excellent mechanical strength and good antibacterial properties.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a paper-plastic composite material and a preparation method thereof. Background technique [0002] Plastic bags are very common in daily life, because they are easy to use, they are often used to pack and store food. The most common plastic bags can be classified into plastic bags and paper-plastic composite plastic bags according to their materials. Although paper plastic bags are environmentally friendly, they are far inferior to plastic bags in terms of mechanical strength and durability. the health of the patient. Plastic bags are also widely used due to their waterproof, high mechanical strength and light weight, but plastic bags have disadvantages such as not easy to degrade, which limits their further use. [0003] But at present, the preparation process of the paper-plastic composite material used to prepare the paper-plastic composite plastic bag is complicated, the cost is hi...

Claims

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Application Information

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IPC IPC(8): D21H19/22D21H17/69D21H17/68D21H13/40D21H11/12
CPCD21H19/22D21H11/12D21H13/40D21H17/68D21H17/69
Inventor 钱万水
Owner ANHUI YUEERWEI PLASTIC MACHINE CO LTD
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