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Processing technology of environment-friendly degradable packaging shell

A processing technology and packaging shell technology, which is applied in the field of environmentally friendly and degradable packaging shell processing technology, can solve the problems of poor dispersion of non-aqueous media and polymers, affecting the application of cellulose, and prone to agglomeration

Inactive Publication Date: 2021-01-29
安徽天路新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cellulose still shows certain deficiencies in practical applications. A large number of hydroxyl groups and hydrogen bonds in the cellulose structure make it extremely hydrophilic, which leads to poor dispersion in non-aqueous media and polymers. Poor, thus prone to agglomeration, which greatly affects the application of cellulose

Method used

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  • Processing technology of environment-friendly degradable packaging shell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The processing technology of the environment-friendly degradable packaging shell includes the following steps:

[0033] Step S1, weighing raw materials according to the following parts by weight: 30 parts of modified kenaf fiber, 20 parts of thermosetting polylactic acid, 1 part of maleic anhydride, and 3 parts of glyceryl triacetate;

[0034] Step S2, adding each raw material into a twin-screw extruder for melt blending and granulation, the blending temperature is 190° C., the rotation speed is 40 r / min, and the melt blending is 10 min;

[0035] Step S3, after being cooled down, pour it into a hot pressing mold, and its stacking height is 1mm higher than the mold;

[0036] Step S4, put the mold into a hot press machine for hot pressing, the hot pressing time is 20min, the hot pressing temperature is 160°C, and the hot pressing pressure is 10Mpa;

[0037] Step S5, raise the temperature to 130°C and continue pressing for 30 minutes, keep the pressure and cool to room te...

Embodiment 2

[0047] The processing technology of the environment-friendly degradable packaging shell includes the following steps:

[0048] Step S1, weighing raw materials according to the following parts by weight: 45 parts of modified kenaf fiber, 30 parts of thermosetting polylactic acid, 2 parts of maleic anhydride, 5 parts of triacetin;

[0049] Step S2, adding each raw material into a twin-screw extruder for melt blending and granulation, the blending temperature is 190° C., the rotation speed is 50 r / min, and the melt blending is 12 min;

[0050] Step S3, after cooling down, pour it into a hot pressing mold, and its stacking height is about 1.5mm higher than the mold;

[0051] Step S4, put the mold into a hot press machine for hot pressing, the hot pressing time is 25min, the hot pressing temperature is 180°C, and the hot pressing pressure is 8Mpa;

[0052] Step S5, raise the temperature to 150°C and continue pressing for 40 minutes, keep the pressure and cool to room temperature, ...

Embodiment 3

[0062] The processing technology of the environment-friendly degradable packaging shell includes the following steps:

[0063] Step S1, weighing raw materials according to the following parts by weight: 60 parts of modified kenaf fiber, 40 parts of thermosetting polylactic acid, 3 parts of maleic anhydride, and 8 parts of triacetin;

[0064] Step S2, adding each raw material into a twin-screw extruder for melt blending and granulation, the blending temperature is 170°C, the rotation speed is 40r / min, and the melt blending is 12min;

[0065] Step S3, after cooling, pour it into a hot-pressing mold, and its stacking height is 0.5mm higher than the mold;

[0066] Step S4, put the mold into a hot press machine for hot pressing, the hot pressing time is 20min, the hot pressing temperature is 160°C, and the hot pressing pressure is 10Mpa;

[0067] Step S5, raise the temperature to 130°C and continue to press for 40 minutes, keep the pressure and cool to room temperature, take out, ...

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Abstract

The invention discloses a processing technology of an environment-friendly degradable packaging shell, and the environment-friendly degradable packaging shell comprises the following raw materials inparts by weight: 30-60 parts of modified kenaf fibers, 20-40 parts of thermosetting polylactic acid, 1-3 parts of maleic anhydride and 3-8 parts of glycerol triacetate. The preparation method comprises the following steps: preparing the modified kenaf fibers: reacting kenaf fiber with sodium hypochlorite for delignification, reacting with potassium hydroxide for removing hemicellulose, adding NaClO2, 2, 2, 6, 6-tetramethylpiperidine oxide and a sodium hypochlorite solution for oxidation, carrying out ultrasonic treatment on an obtained product and lactic acid to enable lactic acid in a water-based medium to react with hydroxyl on the surface of the fiber at high temperature and high pressure, polymerizing lactic acid and replacing hydrogen atoms on hydroxyl, so that cellulose is changed from hydrophilicity to hydrophobicity; therefore, the tensile modulus of the degradable packaging shell is increased, the tensile strength is improved, the elongation at break is better, and the impactstrength is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of degradable packaging materials, and in particular relates to a processing technology of an environment-friendly degradable packaging shell. Background technique [0002] With the development of social economy and the continuous increase of population, environmental pollution is becoming more and more serious. At present, the most widely used raw materials in the packaging industry are plastics. Although plastics have brought a lot of convenience to people, the pollution caused by refractory waste plastics has also tended to be serious. This seriously damaged the living environment of the residents and caused widespread concern. In addition, there are insufficient raw materials for the preparation of traditional plastics, such as petroleum, which is a non-renewable resource and will eventually be exhausted. The traditional plastic manufacturing industry that uses petroleum as raw material will inevitably ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/10C08L67/04C08K5/1539C08K5/103C08B3/08
CPCC08L1/10C08B3/08C08L2201/06C08L67/04C08K5/1539C08K5/103
Inventor 独少培温华伟
Owner 安徽天路新材料股份有限公司
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