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A method for preparing 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: 2018-03-02
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 method for preparing waterproof cellophane
  • A method for preparing waterproof cellophane

Examples

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Effect test

example 1

[0024] Mix 100mL liquid paraffin with 200mL distilled water in a two-necked flask with a stirrer, heat to 60℃, add 3gOP-10 to 100mL distilled water, stir for 10min to obtain a water emulsion, preheat the water emulsion to 60℃ , Put into a two-necked flask, start the stirrer, stir at 200r / min and emulsify for 40min to obtain emulsified liquid paraffin; add 0.8gOP-10 to 40mL acrylic acid, stir for 20min to obtain emulsified acrylic acid, emulsify acrylic acid and emulsify The liquid paraffin was placed in a three-necked flask with a stirrer and a dropping funnel, heated to 70°C, started the stirrer to stir and emulsify for 20 minutes at a speed of 300r / min, and then used the dropping funnel at a dropping rate of 5mL / min. Add 40 mL of 10% potassium thiosulfate solution to a three-necked flask. After the addition is complete, stir and react for 40 minutes to obtain modified emulsified liquid paraffin; put the sugar cane in a sugarcane juicer for 20 minutes to extract the juice to ob...

example 2

[0026] In a two-necked flask with a stirrer, mix 105mL liquid paraffin with 210mL distilled water, heat to 63℃, add 4gOP-10 to 110mL distilled water, stir for 13min to obtain a water emulsion, preheat the water emulsion to 63℃ , Put into a two-necked flask, start the stirrer, stir at 215r / min 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, emulsify acrylic acid and emulsify The liquid paraffin was placed in a three-necked flask with a stirrer and a dropping funnel, heated to 73°C, and the stirrer was started to stir and emulsify for 25 minutes at a speed of 325r / min. Then, the dropping funnel was used at a dropping rate of 6mL / min. Add 43mL of 10% potassium thiosulfate solution to the three-necked flask. After the addition is complete, stir and react for 45 minutes to obtain modified emulsified liquid paraffin. Put the sugarcane in a sugarcane juicer for 23 minutes to extract the ...

example 3

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

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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 method for preparing waterproof cellophane. Background technique [0002] Cellophane is also called cellophane. It is a kind of film made with natural fibers such as cotton pulp and wood pulp as raw materials and glued. It is transparent, non-toxic and tasteless. Because air, oil, bacteria and water do not easily penetrate cellophane, it can be used as food packaging. The paper is soft, transparent and smooth, without holes, air-tight, oil-tight, water-tight, with moderate stiffness, good tensile strength, gloss and printability. The cellophane production process is different from paper making and similar to rayon. It uses refined chemical wood pulp or cotton linters with a high content of a-cellulose as raw materials, and prepares alkali cellulose through processes such as alkalization (18% sodium oxide oxide), squeezing, and crushing. It is then added after...

Claims

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Application Information

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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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