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Preparation method of water-resistant easily-degradable plastic toy

A technology for easily degradable plastics and toys, which is applied in the field of plastic toy preparation, can solve the problems of plastic toys such as discoloration, molecular chain breakage, and poor water resistance, so as to achieve the advantages of no shortened service life, lower glass transition temperature, and excellent corrosion resistance Effect

Inactive Publication Date: 2018-11-06
界首市诚信玩具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, thermoplastic starch is used as a raw material to prepare plastic toys, which has the advantages of easy degradation, safety, greenness and environmental protection, but it has poor water resistance. After blistering, the molecular chains inside the thermoplastic starch are prone to Fracture phenomenon, resulting in discoloration and strength reduction of the prepared plastic toys

Method used

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  • Preparation method of water-resistant easily-degradable plastic toy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a water-resistant and easily degradable plastic toy, comprising the following steps:

[0019] (1) In parts by weight, add 5 parts of lanthanum chloride and 7 parts of gadolinium chloride to 60 parts of water, then add 19 parts of naphthenic acid to it, mix and stir evenly, then raise the temperature of the mixture to 80°C Finally, keep warm for 2 hours, then cool to room temperature, continue to add 15 parts of polyethanolamine to it, after mixing and stirring evenly, the starch modifier is obtained;

[0020] (2) In parts by weight, 55 parts of starch and 3 parts of starch modifier are added to the internal mixer, and after mixing, thermoplastic starch is obtained;

[0021] (3) In parts by weight, add 88 parts of thermoplastic starch, 44 parts of polylactic acid, 0.1 part of antioxidant, and 1 part of plasticizer into a high-speed mixer. After mixing evenly, use a twin-screw extruder to extrude After cooling, drying, and pelletizing to obtain pla...

Embodiment 2

[0028] A method for preparing a water-resistant and easily degradable plastic toy, comprising the following steps:

[0029] (1) In parts by weight, add 7 parts of lanthanum chloride and 9 parts of gadolinium chloride to 65 parts of water, then add 23 parts of naphthenic acid to it, mix and stir evenly, and raise the temperature of the mixture to 84°C Finally, keep warm for 2.5 hours, then cool to room temperature, continue to add 18 parts of polyethanolamine to it, after mixing and stirring evenly, the starch modifier is obtained;

[0030] (2) In parts by weight, 58 parts of starch and 3 parts of starch modifier are added to the internal mixer, and after mixing, thermoplastic starch is obtained;

[0031] (3) In parts by weight, add 90 parts of thermoplastic starch, 48 parts of polylactic acid, 0.3 parts of antioxidant, and 3 parts of plasticizer into a high-speed mixer. After mixing evenly, use a twin-screw extruder to extrude After cooling, drying, and pelletizing to obtain ...

Embodiment 3

[0038] A method for preparing a water-resistant and easily degradable plastic toy, comprising the following steps:

[0039] (1) In parts by weight, add 8 parts of lanthanum chloride and 11 parts of gadolinium chloride to 70 parts of water, then add 25 parts of naphthenic acid to it, mix and stir evenly, and raise the temperature of the mixture to 88°C Finally, keep warm for 3 hours, then cool to room temperature, continue to add 20 parts of polyethanolamine to it, after mixing and stirring evenly, the starch modifier is obtained;

[0040] (2) In parts by weight, 60 parts of starch and 4 parts of starch modifier are added to the internal mixer, and after mixing, thermoplastic starch is obtained;

[0041] (3) In parts by weight, add 92 parts of thermoplastic starch, 50 parts of polylactic acid, 0.5 parts of antioxidant, and 4 parts of plasticizer into a high-speed mixer. After mixing evenly, use a twin-screw extruder to extrude After cooling, drying, and pelletizing to obtain p...

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Abstract

The invention discloses a preparation method of a water-resistant easily-degradable plastic toy. The preparation method includes the following steps: (1) adding lanthanum chloride and gadolinium chloride into water, then adding naphthenic acid, mixing and stirring uniformly, conducting insulation treatment, continuously adding polyethylenimine and mixing and stirring uniformly to obtain a starch modifier; (2) adding starch and the starch modifier into an internal mixer and conducting mixing to obtain the thermoplastic starch; (3) adding the thermoplastic starch, polylactic acid, antioxidant and plasticizer into a high-speed mixer, mixing uniformly, using a twin-screw extruder to extrude the mixture, conducting extruding, cooling, drying and pelletizing to obtain plastic particles, and finally injection molding the plastic particles to obtain the plastic toy. The water-resistant easily-degradable plastic toy prepared by the method has excellent mechanical properties, excellent anti-oxidation and corrosion resistance and especially excellent blister resistance. The service life is not shortened after the toy is immersed in water, and the quality is excellent.

Description

technical field [0001] The invention belongs to the technical field of plastic toy preparation, and in particular relates to a preparation method of a water-resistant and easily degradable plastic toy. Background technique [0002] With the improvement of living standards, people's consumption on plastic toys is gradually increasing, and the sales of plastic toys are also increasing year by year. The disposal of waste toys has become a big problem. If it is not handled properly, a large amount of plastic will become a "killer" that damages the environment; and the recycling cost of plastic is relatively high, and it needs to go through multiple processes before it can be recycled. Therefore, start from raw materials and develop biodegradable plastic toys, so as to fundamentally solve the problem of waste toys disposal. In the prior art, thermoplastic starch is used as a raw material to prepare plastic toys, which has the advantages of easy degradation, safety, greenness and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/04C08L67/04C08K5/134C08K5/12
CPCC08L3/04C08L2201/06C08L67/04C08K5/1345C08K5/12
Inventor 李明国
Owner 界首市诚信玩具有限公司
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