Preparation method of cellophane

A technology of cellophane and mass ratio, which is applied in the direction of paper, papermaking, paper machines, etc., can solve the problems of poor moisture-proof, waterproof and mildew-proof performance, difficult removal of cellophane ink, easy tearing of cellophane, etc., and achieves strong decontamination and increased neutralization Ability, stable effect for a long time

Inactive Publication Date: 2018-06-29
CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: In view of the current shortcomings of cellophane that is easy to tear and absorb water and soften, cellophane needs to consume a large amount of waste paper and it is difficult to remove a large amount of ink, and most of the existing cellophane has poor moisture-proof, waterproof and mildew-proof performance. , provide a kind of preparation method of cellophane

Method used

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  • Preparation method of cellophane

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preparation example Construction

[0019] A preparation method of cellophane, comprising the steps of:

[0020] (1) Take sodium oleate and mix it with deionized water at a mass ratio of 1:9, filter, take the filtrate, adjust the pH to 7~7.2, add acrylic acid with a mass of 30~40% of the filtrate, heat up to 60~70°C and stir and mix for 1 ~2h, then add ammonium persulfate, keep for 2~3h, adjust the pH to 8~9, get the mixed solution, take the waste paper and cut it into small pieces, add the temperature of 60~65℃ according to the mass ratio of 1:8:5 Put water and mixed solution in a pulper to homogenize for 30-40 minutes, take the homogenized solution and add dichloromethane in a mass ratio of 2:9 to mix, keep at 60-70°C for 2-3 hours, and rotate to evaporate to obtain the rotary evaporated product;

[0021] (2) Take dimethyl diallyl ammonium chloride and acrylamide, add deionized water in a mass ratio of 1:2:10, stir and mix for 20-30 minutes to obtain mixture A, take octadecyl acrylate, Tween-60 Add diesel oil...

Embodiment 1

[0027] Polypropylene carbonate coarse powder: purchased from Inner Mongolia Mengxi High-tech Group Company.

[0028] A preparation method of cellophane, comprising the steps of:

[0029] (1) Take sodium oleate and mix it with deionized water at a mass ratio of 1:9, filter, take the filtrate, adjust the pH to 7, add acrylic acid with a mass of 30% of the filtrate, heat up to 60°C and stir for 1 hour, then add ammonium persulfate , keep for 2 hours, adjust the pH to 8 to obtain the mixed solution, take the waste paper and cut it into small pieces, add water and the mixed solution at a temperature of 60°C according to the mass ratio of 1:8:5, and put it in a pulper for homogenization for 30 minutes. Take the homogenate and add dichloromethane at a mass ratio of 2:9 to mix, keep at 60°C for 2 hours, and rotate to evaporate to obtain a rotary evaporate;

[0030] (2) Take dimethyl diallyl ammonium chloride and acrylamide in a mass ratio of 1:2:10, add deionized water, stir and mix ...

Embodiment 2

[0036] Polypropylene carbonate coarse powder: purchased from Inner Mongolia Mengxi High-tech Group Company.

[0037] A preparation method of cellophane, comprising the steps of:

[0038] (1) Take sodium oleate and mix it with deionized water at a mass ratio of 1:9, filter, take the filtrate, adjust the pH to 7.2, add acrylic acid with a mass of 40% of the filtrate, heat up to 70°C and stir for 2 hours, then add ammonium persulfate , keep for 3 hours, adjust the pH to 9 to obtain the mixed solution, take the waste paper and cut it into small paper pieces, add water and the mixed solution at a temperature of 65°C according to the mass ratio of 1:8:5, put it in a pulper for homogenization for 40 minutes, Take the homogenate and add dichloromethane at a mass ratio of 2:9 to mix, keep at 70°C for 3 hours, and rotate to evaporate to obtain a rotary evaporate;

[0039] (2) Take dimethyl diallyl ammonium chloride and acrylamide at a mass ratio of 1:2:10, add deionized water, stir and...

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Abstract

The invention discloses a preparation method of cellophane and belongs to the field of cellophane. Sodium oleate is taken as a main material, a biopolymer anionic surfactant, which is a polymer fattyacid trapping agent, is synthesized through aqueous solution free radical polymerization and is mainly used for electrostatic adsorption of printing ink particles containing anion groups and anions inthe polymer in bivalent calcium ions, formed calcium bridges can gather printing ink particles and remove the particles through flotation to play the role in trapping the printing ink particles, theprinting ink removal rate is high, meanwhile, the agent has the capacity of emulsification, permeability, high fouling removal performance and low surface tension and can remove a large amount of waste paper printing ink, and the utilization rate of recycled paper is improved. The defects that existing cellophane can be torn easily and softened after absorbing water are overcome, and the problemsthat the cellophane consumes a large quantity of waste paper, a large amount of printing ink in the paper is difficult to remove, and most of existing cellophane has the problems of poorer damp-proof,water-proof and mold-proof performance are solved.

Description

technical field [0001] The invention belongs to the field of cellophane, in particular to a preparation method of cellophane. Background technique [0002] Cellophane, also known as cellophane, is a colorless, transparent, glossy, hydrophilic, high oil barrier, and easy-to-print cellulose film. It is made of refined chemical wood pulp or cotton short with high α-cellulose content. Alkali cellulose is prepared by alkalization (18% sodium oxide), pressing, crushing, etc., and after aging, carbon disulfide is added to yellow it into cellulose xanthate. It dissolves to make orange-yellow cellulose viscose. The viscose is matured at a temperature of 20~30°C, filtered to remove impurities and air bubbles, and then extruded through a narrow and long gap in the film stretching machine, and flows into the coagulation bath of the mixture of sulfuric acid and sodium sulfate , to form a film (regenerated cellulose film), and then washed, desulfurized, bleached, desalted and plasticize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21C5/02D21H21/14D21H21/16D21H21/36D21H17/37D21H17/53D21H17/24D21F11/00
CPCD21C5/027D21F11/00D21H11/14D21H17/24D21H17/37D21H17/53D21H21/14D21H21/16D21H21/36Y02W30/64
Inventor 龙海燕郑薇程依
Owner CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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