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Modified polyformaldehyde material

A polyoxymethylene material and technology of polyoxymethylene, applied in the field of modified polyoxymethylene material and its preparation, can solve problems such as not easy to absorb moisture, achieve the effect of improving shrinkage performance and safety performance

Inactive Publication Date: 2019-03-19
QINGDAO YISHIBAO PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, both homopolymer materials and copolymer materials are crystalline materials and are not easy to absorb moisture.

Method used

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  • Modified polyformaldehyde material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh each raw material according to the weight ratio as follows:

[0022] POM raw material: 75

[0023] E-glass fiber: 25

[0024] Antioxidant (ethylene-octene copolymer): 2.0

[0025] Colorant: 0.8

[0026] UV absorber (2-hydroxy-4-n-octyloxybenzophenone): 9.0

[0027] Light stabilizer: 9.0

[0028] Dispersed lubricant (TAS-2A): 1.0

[0029] Glass fiber compatibilizer: 5.0

[0030] (2) First dry mix the above-mentioned various raw materials in a high-speed mixer for 3-5 minutes, and then put them in a twin-screw extruder to melt and extrude, cool, pelletize, and pack the finished product; among them, the twin-screw extruder The temperature of the first zone is 90-100°C, the second zone is 150-180°C, the third zone is 200-210°C, the fourth zone is 200-205°C; the fifth zone is 190-200°C, and the residence time is 1-2 minutes , the pressure is 10-15Mpa.

[0031] Experimental results:

[0032] Characteristic parameters

[0033] The above experimenta...

Embodiment 2

[0035] (1) Weigh each raw material according to the weight ratio as follows:

[0036] POM raw material: 70

[0037] E-glass fiber: 20

[0038] Antioxidant (ethylene-octene copolymer): 1.8

[0039] Colorant: 0.6

[0040] UV absorber (2-hydroxy-4-n-octyloxybenzophenone): 8.5

[0041] Light stabilizer: 8.5

[0042] Dispersed lubricant (TAS-2A): 0.8 Glass fiber compatibilizer: 4.5

[0043] (2) First dry mix the above-mentioned various raw materials in a high-speed mixer for 3-5 minutes, and then put them in a twin-screw extruder to melt and extrude, cool, pelletize, and pack the finished product; among them, the twin-screw extruder The temperature of the first zone is 90-100°C, the second zone is 150-180°C, the third zone is 200-210°C, the fourth zone is 200-205°C; the fifth zone is 190-200°C, and the residence time is 1-2 minutes , the pressure is 10-15Mpa.

[0044] Experimental results:

[0045] Characteristic parameters

[0046] The above test results show tha...

Embodiment 3

[0048] (1) Weigh each raw material according to the weight ratio as follows:

[0049] POM raw material: 80

[0050] E-glass fiber: 30

[0051] Antioxidant (ethylene-octene copolymer): 2.2

[0052] Colorant: 1.0

[0053] UV absorber (2-hydroxy-4-n-octyloxybenzophenone): 9.5

[0054] Light stabilizer: 9.5

[0055] Dispersed lubricant (TAS-2A): 1.2

[0056] Glass fiber compatibilizer: 5.5

[0057] (2) First dry mix the above-mentioned various raw materials in a high-speed mixer for 3-5 minutes, and then put them in a twin-screw extruder to melt and extrude, cool, pelletize, and pack the finished product; among them, the twin-screw extruder The temperature of the first zone is 90-100°C, the second zone is 150-180°C, the third zone is 200-210°C, the fourth zone is 200-205°C; the fifth zone is 190-200°C, and the residence time is 1-2 minutes , the pressure is 10-15Mpa.

[0058] Experimental results:

[0059] Characteristic parameters

standard test

Performan...

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PUM

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Abstract

The invention is intended to provide a modified polyformaldehyde material to improve contractibility of polyformaldehyde material and a preparation method thereof. Polyformaldehyde is a high-density high-crystallinity linear polymer with no side chains which has good integrated performance, as well as excellent wear resistance and self-lubricating property, good oil resistance and good peroxide resistance. Polyformaldehyde is a tough elastic material which has good creep resistance, good geometric stability and good impact resistance even at low temperature. However, polyformaldehyde is a crystallizable material and rarely absorbs moisture. High crystallization degree of polyformaldehyde leads to a high shrinkage, up to 2-3.5%, which is different to different reinforcing materials. Therefore, shrinkage of polyformaldehyde is improved through glass fiber reinforcement. Shrinkage stability of the polyformaldehyde material can be evidently improved.

Description

technical field [0001] The invention belongs to the technical field of polyoxymethylene material production, and specifically relates to a modified polyoxymethylene material which improves the original deficiency of polyoxymethylene so that it has good shrinkage performance and a preparation method thereof. Background technique [0002] POM, English name: polyoxymethylene, abbreviated name POM. Its chemical formula is: CH2O. The structural formula is as follows: [0003] [0004] Polyoxymethylene is a linear polymer with no side chain, high density and high crystallinity, and has excellent comprehensive properties. Its wear resistance and self-lubrication are also superior to most engineering plastics, and it has good oil resistance and peroxide resistance. It is not resistant to acid, strong alkali and ultraviolet radiation of sunlight. Polyoxymethylene is a tough and elastic material, and it still has good creep resistance, geometric stability and impact resistance e...

Claims

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Application Information

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IPC IPC(8): C08L59/00C08L23/08C08K13/04C08K7/14C08K5/132
CPCC08L59/00C08L23/0815C08K13/04C08K7/14C08K5/132
Inventor 栾蓉
Owner QINGDAO YISHIBAO PLASTIC
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