A kind of preparation method of waterproof cellophane

A technology of cellophane and preparation steps, which is applied in the field of preparation of waterproof cellophane, which can solve the problems of easy water absorption and deformation of cellophane, and achieve the effects of improved compactness, improved water resistance, and reduced hydroxyl content

Active Publication Date: 2020-05-19
广东冠豪新材料研发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a preparation method of waterproof cellophane for the defect that the cellophane is easy to absorb water and deform due to the hydrophilicity of cellulose in the cellophane

Method used

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  • A kind of preparation method of waterproof cellophane
  • A kind of preparation method of waterproof cellophane

Examples

Experimental program
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Effect test

example 1

[0024]Mix 100mL of liquid paraffin and 200mL of distilled water in a two-necked flask with a stirrer, heat up to 60°C, add 3g of OP-10 into 100mL of distilled water, stir for 10min to obtain a water emulsion, preheat the water emulsion to 60°C , put it into a two-necked flask, start the agitator, stir at a speed of 200r / min, stir and emulsify for 40min to obtain emulsified liquid paraffin; add 0.8g OP-10 to 40mL acrylic acid, stir for 20min to obtain emulsified acrylic acid, and emulsify acrylic acid and emulsified The liquid paraffin was placed in a three-neck flask equipped with a stirrer and a dropping funnel, heated to 70°C, started the stirrer to stir and emulsify at a speed of 300r / min for 20min, and then used a dropping funnel at a dropping rate of 5mL / min. Add dropwise 40mL of potassium thiosulfate solution with a mass fraction of 10% to the three-neck flask. After the dropwise addition, stir and react for 40 minutes to obtain modified emulsified liquid paraffin; place ...

example 2

[0026] Mix 105mL liquid paraffin and 210mL distilled water in a two-necked flask with a stirrer, heat up to 63°C, add 4g OP-10 into 110mL distilled water, stir for 13min to obtain an aqueous emulsion, preheat the aqueous emulsion to 63°C , put it into a two-necked flask, start the agitator, stir at a speed of 215r / min, stir and emulsify for 43min to obtain emulsified liquid paraffin; add 0.9g OP-10 to 45mL acrylic acid, stir for 23min to obtain emulsified acrylic acid, emulsified acrylic acid and emulsified The liquid paraffin was placed in a three-necked flask with a stirrer and a dropping funnel, heated to 73°C, started the stirrer to stir and emulsify at a speed of 325r / min for 25min, and then used a dropping funnel at a dropping rate of 6mL / min. Add dropwise 43mL of potassium thiosulfate solution with a mass fraction of 10% to the three-neck flask. After the dropwise addition, stir and react for 45min to obtain modified emulsified liquid paraffin; place sugarcane in a sugar...

example 3

[0028] Mix 110mL of liquid paraffin and 220mL of distilled water in a two-necked flask with a stirrer, heat up to 65°C, add 5g of OP-10 into 120mL of distilled water, stir for 15min to obtain an aqueous emulsion, preheat the aqueous emulsion to 65°C , put it into the two-necked flask, start the stirrer, stir at a speed of 230r / min, stir and emulsify for 45min to obtain emulsified liquid paraffin; add 1.0g OP-10 to 50mL acrylic acid, stir for 25min to obtain emulsified acrylic acid, emulsified acrylic acid and emulsified The liquid paraffin was placed in a three-neck flask equipped with a stirrer and a dropping funnel, heated to 75°C, started the stirrer to stir and emulsify at a speed of 350r / min for 30min, and then used a dropping funnel at a dropping rate of 7mL / min. Add 45mL of potassium thiosulfate solution with a mass fraction of 10% dropwise to the three-necked flask. After the dropwise addition, stir and react for 50 minutes to obtain modified emulsified liquid paraffin;...

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Abstract

The invention relates to the technical field of packaging paper, and particularly relates to a method for preparing waterproof cellophane. Emulsified paraffin and an acrylic acid monomer are subjectedto an emulsification reaction initiated by potassium thiosulfate to obtain modified emulsified liquid paraffin; bagasse is subjected to alkalization and yellowing to obtain cellulose viscose; after the cellulose viscose and the modified emulsified liquid paraffin are mixed and subjected to film drawing, a product is put into a coagulating bath and then taken out; and the product is subjected to water washing, alcohol washing and drying to obtain the waterproof cellophane. An esterification reaction allows distances among wood fibers to be reduced, thus improving waterproofness of the cellophane. The modified emulsified liquid paraffin has large bond energy and is a hydrophobic group, thus facilitating waterproofness improvement. Crosslinking occurs during film drawing because of the existence of acrylic acid so that compactness of the liquid paraffin that is a surface protective film of the viscose is improved and cellulose in the cellophane hardly absorbs water through the compact protective film, and therefore waterproofness of cellulose is improved and the cellophane has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of packaging paper preparation, in particular to a preparation method of waterproof cellophane. Background technique [0002] Cellophane is also called cellophane. It is a film made of natural fibers such as cotton pulp and wood pulp by adhesive method. It is transparent, non-toxic and tasteless. Because air, oil, bacteria and water are not permeable to cellophane, it can be used as food packaging. The paper is soft, transparent and smooth, without holes, airtight, oil-proof, water-proof, moderate stiffness, good tensile strength, gloss and printability. The production process of cellophane is different from that of paper, and similar to rayon. It uses refined chemical wood pulp or cotton linters with high a-cellulose content as raw materials, and alkalization (18% sodium oxide), pressing, crushing and other processes to obtain alkali cellulose, and then add it after aging Carbon disulfide yellows it in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L91/06C08L33/02C08J7/14C08J5/18
CPCC08J5/18C08J7/14C08J2397/02C08J2491/06C08L97/02C08L2203/16C08L2205/03C08L91/06C08L33/02
Inventor 王金华何俊欣张淑娴
Owner 广东冠豪新材料研发有限公司
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