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Preparation method of environmental-friendly breathable composite film

A composite film and environment-friendly technology, applied in the field of preparation of environment-friendly breathable composite films, can solve the problems of inability to eliminate visual pollution, consume a large amount of food, etc., and achieve the effects of sustainable development, good mechanical properties, and good air permeability.

Inactive Publication Date: 2018-08-10
FOSHAN XIHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradable plastics manufactured by adding additives such as starch, cellulose, and biodegradants to plastics consume a lot of food and cannot eliminate visual pollution, which has certain limitations.

Method used

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  • Preparation method of environmental-friendly breathable composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of an environment-friendly breathable composite film, the components are calculated by weight, comprising the following steps:

[0029] (1) Take 30 parts of hardwood kraft dry pulp board and pre-soak for 24 hours, use a fiber dissociation machine to disintegrate into a fiber slurry suspension with a pulp concentration of 1%, add 5 parts of bamboo pulp, and then add 5 parts of 2,2, 6,6-Tetramethylpiperidine oxide, 10 parts of sodium bromide and sodium hypochlorite solution were monitored with a pH meter and NaOH solution was continuously added dropwise to maintain the pH of the reaction system at 10.5 until the pH value of the reaction system no longer changed;

[0030] (2) adding ethanol, stirring at room temperature to terminate the reaction;

[0031] (3) The slurry is repeatedly washed with deionized water until the conductivity of the filtrate is 9 μS / cm;

[0032] (4) Transfer to a grinder for grinding, the grinding scale is -5 μm, the rotation ...

Embodiment 2

[0038] A preparation method of an environment-friendly breathable composite film, the components are calculated by weight, comprising the following steps:

[0039] (1) Take 35 parts of hardwood kraft dry pulp boards and pre-soak them for 24 hours, use a fiber dissociation machine to decompose into a fiber slurry suspension with a pulp concentration of 1%, add 6 parts of bamboo pulp, and then add 6 parts of 2,2, 6,6-Tetramethylpiperidine oxide, 13 parts of sodium bromide and sodium hypochlorite solution were monitored with a pH meter and NaOH solution was continuously added dropwise to maintain the pH of the reaction system at 10.5 until the pH value of the reaction system no longer changed;

[0040] (2) adding ethanol, stirring at room temperature to terminate the reaction;

[0041] (3) Wash the slurry repeatedly with deionized water until the conductivity of the filtrate is 8.5 μS / cm;

[0042] (4) Transfer to a grinder for grinding, the grinding scale is -5 μm, the rotation ...

Embodiment 3

[0048] A preparation method of an environment-friendly breathable composite film, the components are calculated by weight, comprising the following steps:

[0049] (1) Take 35 parts of hardwood kraft pulp dry pulp board and pre-soak for 24 hours, use a fiber dissociation machine to disintegrate into a fiber slurry suspension with a pulp concentration of 1%, add 8 parts of bamboo pulp, and then add 7 parts of 2,2, 6,6-Tetramethylpiperidine oxide, 15 parts of sodium bromide and sodium hypochlorite solution were monitored with a pH meter and NaOH solution was continuously added dropwise to maintain the pH of the reaction system at 10.5 until the pH value of the reaction system no longer changed;

[0050] (2) adding ethanol, stirring at room temperature to terminate the reaction;

[0051] (3) Wash the slurry repeatedly with deionized water until the conductivity of the filtrate is 8 μS / cm;

[0052] (4) Transfer to a grinder for grinding, the grinding scale is -5 μm, the rotation sp...

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Abstract

The invention provides a preparation method of an environmental-friendly breathable composite film. The preparation method comprises the following steps: pre-soaking and defibering kraft hardwood pulpdry pulp board into fiber slurry suspension, adding bamboo pulp, 2,2,6,6-tetramethyl-piperidin-1-oxyl, sodium bromide and sodium hypochlorite solution, dropping a NaOH solution, and maintaining the pH value of the reaction system; adding ethanol to terminate the reaction; washing the pulp; grinding to obtain pulp A; taking an aqueous solution of ethanol, regulating the pH, adding 3-aminopropyltriethoxysilane for stirring; adding the pulp A and wula sedge xylogen, stirring to obtain pulp B, and performing suction filtration on the pulp B with absolute ethyl alcohol so as to obtain pulp C; mixing, stirring and dissolving polylactic acid and dichloromethane, adding the pulp C, waxy modified corn starch and pea starch solution and sorbitan trioleate, and stirring to obtain a mixed solution; casting the mixed solution, and drying into a film, thereby obtaining the product. The film prepared by the method has excellent mechanical property and excellent breathability, the raw materials are green, non-toxic and reproducible, and sustainable development is well realized.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly breathable composite film. Background technique [0002] Since the 1970s, plastic products have been widely used in the field of packaging due to their advantages such as high strength, light weight, low cost, and good chemical stability, such as plastic packaging bags, disposable lunch boxes, etc. However, these wastes of plastic products are difficult to degrade after entering the environment, causing serious "white pollution", bringing serious environmental problems, and seriously affecting the survival of human beings, animals and plants. The ecological balance is also affected to a certain extent. Mineral resources such as petroleum and natural gas for the manufacture of polymer materials are decreasing and are expected to be exhausted in 80 years. The degradable plastics manufactured by adding additives such as starch, cellulose, and biodegradants to plastics consume a lot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/00C08L1/02C08L3/00C08L3/02C08K5/1535C08J5/18
Inventor 何敬堂庞婉青
Owner FOSHAN XIHUA TECH CO LTD
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