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Biodegradation cushioning packing material and preparation method thereof

A biodegradable and cushioning packaging technology, applied in the field of packaging materials, can solve the problems of not using degradable materials, unfavorable large-scale industrial production, and strict requirements for film-forming enhancers, so as to achieve easy chemical and physical modification, easy process parameters Controlled, Inexpensive Effects

Inactive Publication Date: 2009-12-23
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material starch used in this method is expensive, and the film-forming enhancer is demanding, which is not conducive to large-scale industrial production.
[0003] Rapeseed cake is rich in sources and low in price, but it has not been applied to the research of degradable materials, and no one has used rapeseed cake as a raw material to make degradable cushioning packaging materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ①Toluene-2,4-diisocyanate (TDI) and polypropylene glycol (PPG) are distilled and purified; 1,2-dichloroethane is dehydrated and dried, and the rapeseed cake is dried in an oven to remove water;

[0022] ② Weigh 1.29g TDI and 3.71g PPG into a one-mouth bottle;

[0023] ③Heat the reaction system in a collector-type constant temperature heating magnetic stirrer, and set the temperature to 40°C

[0024] ④After 30 minutes, add 5g of rapeseed meal and drop in 2g of 1,2-dichloroethane;

[0025] ⑤ Add 0.1 g of tung oil and sodium dodecylsulfonate dropwise during the reaction;

[0026] ⑥React for 10 minutes, add 0.1g sodium bicarbonate to foam for 5 seconds;

[0027] ⑦ Pour the reaction system into the mold quickly;

[0028] ⑧Put the mold in an oven at 65°C to continue foaming and drying;

[0029] ⑨Take it out after 24 hours and place it in a dry place;

[0030] ⑩The average density of the three groups of products measured after the material is formed is 0.15g / cm3; the yiel...

Embodiment 2

[0032] ①Toluene-2,4-diisocyanate (TDI) and polypropylene glycol (PPG) are distilled and purified; 1,2-dichloroethane is dehydrated and dried, and the rapeseed cake is dried in an oven to remove water;

[0033] ② Weigh 2.32g TDI and 6.68g PPG into a one-mouth bottle;

[0034] ③Heat the reaction system in a collector-type constant temperature heating magnetic stirrer, and set the temperature to 45°C

[0035] ④After 30 minutes, add 5g of rapeseed meal and drop in 2g of 1,2-dichloroethane;

[0036] ⑤Add 0.1g each of tung oil and sodium dodecylsulfonate during the reaction;

[0037] ⑥React for 30 minutes, add 0.4g sodium bicarbonate to foam for 6 seconds;

[0038] ⑦ Pour the reaction system into the mold quickly;

[0039] ⑧Put the mold in an oven at 65°C to continue foaming and drying;

[0040] ⑨Take it out after 24 hours and place it in a dry place;

[0041] ⑩The average density of three groups of products measured after the material is formed is 0.12g / cm3; the yield limit va...

Embodiment 3

[0043] ①Toluene-2,4-diisocyanate (TDI) and polypropylene glycol (PPG) are distilled and purified; 1,2-dichloroethane is dehydrated and dried, and the rapeseed cake is dried in an oven to remove water;

[0044] ② Weigh 1.29g of TDI, put 5g of rapeseed meal into a one-mouth bottle, add 2.5g of 1,2-dichloroethane;

[0045] ③Heat the reaction system in a collector-type constant temperature heating magnetic stirrer, and set the temperature to 50°C

[0046] ④ After 30 minutes, add 3.71g PPG;

[0047] ⑤Add 0.1g each of tung oil and sodium dodecylsulfonate during the reaction;

[0048] ⑥ After another 10 minutes, add 0.1 water to foam for 7 seconds;

[0049] ⑦ Pour the reaction system into the mold quickly;

[0050] ⑧Put the mold in an oven at 80°C to dry;

[0051] ⑨Take it out after 24 hours and place it in a dry place;

[0052] ⑩The average density of three groups of products measured after the material is formed is 0.13g / cm3; the yield limit value is 688N / cm2; under natural so...

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Abstract

The invention relates to biodegradation cushioning packing material and a preparation method thereof; the packing material comprises following raw materials: rapeseed cake, toluene 2, 4-diisocyanate, polypropylene glycol, 1,2-dichloroethane, tung oil which occupies 1wt% of total mass of the raw material, sodium dodecylbenzene sulfonate which occupies 1wt% of total mass of the raw material, and 1wt% to 4 wt% of forming agent; the molar ratio of toluene 2, 4-diisocyanate and polypropylene glycol is 2:1; the ration of the mass sum of the toluene 2, 4-diisocyanate and polypropylene glycol, and the mass of rapeseed cake is 1:1 to 9:1; and forming agent is water or sodium bicarbonate. The density of the biodegradation cushioning packing material is between 0.1 to 0.2g / cm; the yield limiting value is between 450 to 800 N / cm; and in a natural soil burial condition, after 90 days, the material is degraded by about 50 to 60%. The main raw materials of the invention has wide sources and low cost; the preparation technique is simpler and the technological parameters are more easily controlled.

Description

technical field [0001] The invention belongs to the field of packaging materials, in particular to a biodegradable cushioning packaging material and a preparation method thereof. Background technique [0002] At present, scientists use many polymer materials to prepare degradable cushioning packaging materials. In developed countries, water vapor is mainly used as foaming agent, and plant fiber and starch are mostly mixed and foamed to make new cushioning packaging materials. At present, cushioning materials using corn stalks as raw materials have been produced in China. Chinese patent CN1544516A discloses a fully biodegradable foam cushioning packaging material, the method uses more than 80% starch as the base material, and superfine polyvinyl alcohol as a film-forming enhancer. However, the raw material starch used in this method is expensive, and the film-forming enhancer is demanding, which is not conducive to large-scale industrial production. [0003] Rapeseed cake i...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/76B65D65/46C08G101/00
CPCY02W90/10
Inventor 黎厚斌张乾刘娟
Owner WUHAN UNIV
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