Preparation method of molded pulp plastic packaging material

A technology of pulp molding and packaging materials, which is applied in the field of packaging materials, can solve the problems of easy tearing, low structural strength of wet billets, and high moisture content, so as to reduce moisture content, improve surface smoothness and evenness, and improve finished products. rate effect

Active Publication Date: 2017-08-22
YIXING XINTIANDI PACKING PROD
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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: Aiming at the problems that currently used pulp molding wet billets have a high moisture content, resulting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 200g of waste single-sided corrugated cardboard, cut it into pieces of 20mm×20mm, soak it in 2L deionized water for 5h, then transfer it to a pulper for crushing and beating until the beating degree is 25°SR, and then filter to obtain the filter residue , after washing the filter residue with deionized water for 3 times, add the filter residue into 20L deionized water, and stir at 500r / min for 1h to obtain a pulp suspension; weigh 20g of gypsum and put it into a mortar for grinding for 20min, then grind the ground gypsum powder Mix it with 400mL of 80% ethylene glycol aqueous solution and put it into a high-pressure reactor, then add 1.0g of magnesium chloride and 0.2g of aluminum chloride and stir at 200r / min for 15min, then seal the high-pressure reactor and heat it to 120°C for reaction After 2 hours, cool naturally to room temperature and filter to obtain the filter cake, and wash the filter cake with deionized water until the washing liquid is neutral, then pl...

example 2

[0023]Weigh 300g of waste single-sided corrugated cardboard, cut it into pieces of 20mm×20mm, soak it in 3L deionized water for 6 hours, then transfer it to a pulper for crushing and beating until the degree of beating is 25°SR, and then filter to obtain the filter residue , after washing the filter residue with deionized water for 5 times, add the filter residue to 30L deionized water and stir at 600r / min for 2h to obtain a pulp suspension; weigh 30g of gypsum and put it into a mortar for grinding for 30min, then grind the ground gypsum powder Mix it with 600mL of 80% ethylene glycol aqueous solution and put it into a high-pressure reactor, then add 1.5g of magnesium chloride and 0.3g of aluminum chloride and stir at 300r / min for 20min, then seal the high-pressure reactor and heat it to 140°C for reaction 3h, naturally cooled to room temperature and filtered to obtain the filter cake, and washed the filter cake with deionized water until the washing liquid was neutral, then pl...

example 3

[0025] Weigh 250g of waste single-sided corrugated cardboard, cut it into pieces of 20mm×20mm, soak it in 2L deionized water for 5.5h, then transfer it to a pulper for crushing and beating until the degree of beating is 25°SR, and then filter to obtain After washing the filter residue with deionized water for 4 times, the filter residue was added to 25L deionized water, stirred at 550r / min for 1.5h to obtain a pulp suspension; 25g of gypsum was weighed into a mortar and ground for 25min, and then the ground Mix gypsum powder with 500mL of 80% ethylene glycol aqueous solution and put it into the high-pressure reactor, then add 1.2g of magnesium chloride, 0.2g of aluminum chloride and stir at 250r / min for 18min, then seal the high-pressure reactor and heat it to 130 ℃ for 2.5 hours, naturally cooled to room temperature and then filtered to obtain the filter cake, and washed the filter cake with deionized water until the washing liquid was neutral, then placed the filter cake in a...

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PUM

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Abstract

The invention discloses a preparation method of a molded pulp plastic packaging material, and belongs to the technical field of packaging materials. The molded pulp plastic packaging material is prepared through the following steps: soaking a waste single-face corrugated board in deionized water, crushing, pulping, washing to remove impurities, adding into the deionized water to prepare a pulp suspension solution, taking a land plaster as a raw material, doping with aluminum chloride to obtain a compound gypsum crystal whisker, gelatinizing a corn starch, compounding the corn starch with span-80 and tween-60 to prepare a compound emulsifier, modifying rosin through the compound emulsifier, cationic polyacrylamide and polyvinyl alcohol, finally mixing the pulp suspension solution, the compound emulsifier and a modified rosin size, filtering water, forming, demolding, reshaping through hot pressing. According to a prepared molded pulp, a size film is generated on the surface of a paper film through the compound gypsum crystal whisker and the modified rosin size, so that the moisture content of a wet green is reduced, the structure strength of the wet green is improved, the tearing phenomenon easily occurring in the demolding process is avoided, and the rate of finished products is increased.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a preparation method of pulp molded packaging materials. Background technique [0002] Pulp molded packaging products are a new type of packaging material that is green, environmentally friendly, and energy-saving. It is mainly made of degradable bagasse and waste paper, which can reduce the consumption of forest resources. The advantages of low cost have been widely used in the packaging of electronic communications, furniture, agricultural and sideline products, toys and other industries. [0003] "Pulp molding" is a processing method in which pulp is used as raw material, and a mold with a filter is used to dehydrate pulp and form fibers under conditions such as pressure and time to produce desired products. Pulp molded packaging products are formed by absorbing a certain concentration of pulp through a mold under the action of negative pressure, so th...

Claims

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Application Information

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IPC IPC(8): D21J3/00D21H11/14D21H17/69D21H17/67D21H21/10D21H17/62
CPCC30B7/10C30B29/46C30B29/62D21B1/32D21B1/345D21H11/14D21H17/06D21H17/28D21H17/31D21H17/62D21H17/66D21H17/67D21H17/675D21H17/69D21H21/10D21J3/00D21J5/00Y02W30/64
Inventor 周益铭杨阳李雪晴
Owner YIXING XINTIANDI PACKING PROD
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