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Dehumidifying agent for plastic shaping and its preparing method

A technology for plastic molding and dehumidifying agent, applied in the field of dehumidifying agent and its preparation, can solve problems such as affecting the intrinsic performance and appearance of products, limitations in the application and promotion of production technology, unqualified product performance, etc., and achieves good dehumidifying effect. , the preparation method is simple, the effect of simple components

Active Publication Date: 2005-05-04
丁少忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a result, when the modified starch is used to produce biodegradable plastic products, water bubbles are generated during the molding process (extrusion molding, injection molding or blister molding, hollow molding, etc.) (because these plastic molding processing temperatures are all at 100 At this temperature, all water molecules will vaporize and form blisters), which will affect the internal performance and appearance of the product, resulting in unqualified performance of the produced product, resulting in the production technology of using modified starch to produce biodegradable plastic products. and promotion are relatively limited

Method used

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  • Dehumidifying agent for plastic shaping and its preparing method

Examples

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Effect test

Embodiment 1

[0024] (1) Take 250kg of MgO and place it in a 500-type high-mixer, add 15kg of liquid paraffin, turn on the high-mixing switch and mix until the temperature of the machine rises to 80°C to 85°C, stop the high-mixing, add 3kg of liquid paraffin and 3kg of aluminate For the mixed solution that is compatible with the coupling agent, turn on the low-mixing switch and knead for 15-18 minutes, or mix until the temperature of the machine rises to 115°C-120°C, add 4kg of sodium stearate stabilizer, and then low-mix for 4-6 Take it out of the pot after a few minutes, put the above materials in the cold mixer and add 75kg LDPE to stir evenly and cool to 60°C-65°C before taking out the pot.

[0025] (2) Pour the above-mentioned mixture into the KS-75 twin-screw extruder with high aspect ratio and double exhaust in the same direction for mastication, extrusion and granulation. The plasticizing process temperature is: one group 130°C, two groups 130°C, three groups 135°C, four groups 140°...

Embodiment 2

[0027] (1) Take 250kg CaO and place it in a 500-type high-mixer, add 22.5kg of liquid paraffin, turn on the high-mix switch and mix until the temperature of the machine rises to 90°C to 95°C, stop the high-mixer, add 2.5kg of liquid paraffin and 2.5kg of For the mixed solution compatible with titanate coupling agent, turn on the low-mixing switch and knead for 12-15 minutes, or mix until the temperature of the machine rises to 115°C-120°C, add 4kg of stearic acid stabilizer, and then low-mix for 5 After 6 minutes, put the above materials into the cold mixer and add 40kg LDPE to stir evenly and cool to 65°C-70°C before taking out the pot.

[0028] (2) Pour the above-mentioned mixture into the KS-75 twin-screw extruder with high aspect ratio and double exhaust in the same direction for mastication, extrusion and granulation. The plasticizing process temperature is: one group 115°C, two groups 120°C, three groups 125°C, four groups 125°C, five groups 125°C, six groups 125°C, seve...

Embodiment 3

[0030] (1) Take 200kg CaO and place it in a 500-type high-mixer, add 12kg of liquid paraffin, turn on the high-mixing switch and mix until the temperature of the machine rises to 90°C to 95°C, stop the high-mixing, add 3kg of high-boiling point solvent oil and 3kg of aluminum The mixed solution that is compatible with the ester coupling agent, then turn on the low-mixing switch and knead the reaction until the temperature of the machine rises to 118 ° C, add 3kg of stearic acid stabilizer, and then mix it at low temperature for 5 minutes, then take it out of the pot, and put the above materials in the Add 10kg LDPE and 10kg LLDPE to the cold mixer, stir evenly and cool to 63°C before taking out the pot.

[0031] (2) Pour the above-mentioned mixture into the KS-75 twin-screw extruder with high aspect ratio and double exhaust in the same direction for mastication, extrusion and granulation. The plasticizing process temperature is: one group 135°C, two groups 140°C, three groups ...

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Abstract

The invention relates to a kind of wet absorption agent for plastics formation and processing and its manufacturing method. The mentioned wet absorption agent is composed with solid inorganic oxide, lubricant, coupling agent, stabilizing agent, and cross-linking agent. The manufacturing steps are: 1. blend it, 2. extrude granulation. The wet absorption agent used for plastics formation and processing and its manufacturing method mentioned above has simple components, convenient manufacturing method, and well wet absorption effictiveness So it can satisfy wet absorption requirement in producing biodegradable plastics formation and processing procedure with modified starch, and can popularize technology usage of producing biodegradable plastics with modified starch greatly.

Description

technical field [0001] The invention relates to a dehumidifier and a preparation method thereof, in particular to a dehumidifier used for plastic molding and a preparation method thereof. Background technique [0002] In recent years, the use of modified starch to produce biodegradable plastic products has become the main production trend of global plastic environmental protection enterprises. However, in actual production, since starch is a natural polymer in the plastic environmental protection industry, each molecular repeating unit contains three Hydroxyl, which has a typical hydrophilicity, is very easy to combine with water molecules, absorb moisture in the air, and become humid. [0003] Reaction formula: [0004] [0005] As a result, when the modified starch is used to produce biodegradable plastic products, water bubbles are generated during the molding process (extrusion molding, injection molding or blister molding, hollow molding, etc.) (because these plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/54C08L23/06
Inventor 丁少忠
Owner 丁少忠