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Surface sizing agent for improving stiffness of plant fiber packaging meal box and preparation method of surface sizing agent

A technology of surface sizing agent and plant fiber, applied in the field of materials, can solve the problems of poor performance improvement effect, cumbersome preparation, complex composition, etc., and achieve the effect of good performance improvement, improvement of shrinkage potential energy, and good effect.

Inactive Publication Date: 2021-06-11
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition of various stiffness agents on the market, the preparation is cumbersome, and there are few types used to improve the performance of lunch boxes, and the performance improvement effect is poor, so it is necessary to develop a new type of stiffness agent for plant fiber meals. Improve the stiffness, tensile strength, and ring compressive strength of lunch boxes to open up the vast market for lunch boxes prepared from agricultural straw fibers

Method used

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  • Surface sizing agent for improving stiffness of plant fiber packaging meal box and preparation method of surface sizing agent
  • Surface sizing agent for improving stiffness of plant fiber packaging meal box and preparation method of surface sizing agent
  • Surface sizing agent for improving stiffness of plant fiber packaging meal box and preparation method of surface sizing agent

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Experimental program
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Effect test

Embodiment 1

[0026] The preparation of the surface sizing agent 1 that embodiment 1 improves lunch box stiffness

[0027] For the synthesis of surface sizing agent, prepare 53% deionized water, 8% gelatinized starch, 6% polyacrylamide, 10% styrene, 8% hydroxyethyl methacrylate, 12% by mass percentage. % butyl acrylate, 3% dicyclohexyl peroxydicarbonate, 0.02% polyvinyl alcohol and calcium carbonate. Mix half the mass of styrene, hydroxyethyl methacrylate, butyl acrylate and other monomers with deionized water at 55-65°C, stir at 2000 rpm, add polyacrylamide and continue stirring, add the remaining monomers after 10 minutes, and After adding all the polyvinyl alcohol and calcium carbonate, stir and raise the temperature to 70-80°C, add dicyclohexyl peroxydicarbonate as an initiator dropwise, react for 30 minutes and keep it warm for 1 hour, then adjust the pH to neutral and mix with gelatinized starch Obtain the surface sizing agent uniformly.

Embodiment 2

[0028] The preparation of the surface sizing agent 2 that embodiment 2 improves lunch box stiffness

[0029] For the synthesis of surface sizing agent, prepare 54% deionized water, 8% gelatinized starch, 6% polyacrylamide, 10% styrene, 8% hydroxyethyl methacrylate, 12% by mass percentage. % butyl acrylate, 2% dicyclohexyl peroxydicarbonate, 0.01%-0.03% polyvinyl alcohol and calcium carbonate. Mix half the mass of styrene, hydroxyethyl methacrylate, butyl acrylate and other monomers with deionized water at 55-65°C, stir at 2000 rpm, add polyacrylamide and continue stirring, add the remaining monomers after 10 minutes, and After adding all the polyvinyl alcohol and calcium carbonate, stir and raise the temperature to 70-80°C, add dicyclohexyl peroxydicarbonate as an initiator dropwise, react for 30 minutes and keep it warm for 1 hour, then adjust the pH to neutral and mix with gelatinized starch Obtain the surface sizing agent uniformly.

Embodiment 3

[0030] The preparation of the surface sizing agent 3 that embodiment 3 improves lunch box stiffness

[0031] For the synthesis of surface sizing agent, prepare 52% deionized water, 8% gelatinized starch, 6% polyacrylamide, 10% styrene, 8% hydroxyethyl methacrylate, 12% by mass percentage. % butyl acrylate, 4% dicyclohexyl peroxydicarbonate, 0.01%-0.03% polyvinyl alcohol and calcium carbonate. Mix half the mass of styrene, hydroxyethyl methacrylate, butyl acrylate and other monomers with deionized water at 55-65°C, stir at 2000 rpm, add polyacrylamide and continue stirring, add the remaining monomers after 10 minutes, and After adding all the polyvinyl alcohol and calcium carbonate, stir and raise the temperature to 70-80°C, add dicyclohexyl peroxydicarbonate as an initiator dropwise, react for 30 minutes and keep it warm for 1 hour, then adjust the pH to neutral and mix with gelatinized starch Obtain the surface sizing agent uniformly.

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Abstract

The invention discloses a surface sizing agent for improving stiffness of a plant fiber packaging meal box and a preparation method of the surface sizing agent, and belongs to the technical field of materials. The surface sizing agent is composed of styrene (St), hydroxyethyl methylacrylate (HEMA), propyl acrylate (BA) and the like, polyvinyl alcohol and calcium carbonate are added for enhancing the sizing effect, and potassium persulfate is used as an initiator to synthesize the surface sizing agent. The obtained surface sizing agent is mixed with cationic starch and a polyacrylamide compound according to a certain proportion to obtain a sizing solution. The inner surface and the outer surface of a meal box are coated with the coating in a surface coating mode to form a continuous and complete adhesive film, so that the rigidity of the paper box is remarkably enhanced. The middle layer of the meal box is a plant fiber base layer, and the inner layer and the outer layer are coated with surface sizing liquid to form rigid protective films so as to improve the stiffness, ring crush compression resistance, tensile strength and other properties of the meal box. Tests on the indexes show that all the indexes of the meal box after sizing are greatly improved, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a surface sizing agent for improving the stiffness of plant fiber packaging lunch boxes and a preparation method thereof. Background technique [0002] my country is a big country that consumes wood. Due to the lack of wood raw materials, most enterprises turn their attention to plant fibers such as crop straw and bagasse, which are rich in resources and low in price. The production of packaging boxes and lunch boxes is not only conducive to reducing the pressure of environmental pollution. , improve the use efficiency of agricultural and sideline products, and reduce wood consumption, greatly alleviating the shortage of wood raw materials. [0003] In order to make full use of agricultural straw and other raw materials, various plant fiber packaging products have been developed. However, due to the poor strength of single fiber of agricultural straw fiber, these fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21J3/00
CPCD21H21/16D21J3/00
Inventor 黄和沈宝星徐晴马成功王宜峰
Owner NANJING NORMAL UNIVERSITY