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Polyoxymethylene (POM) encapsulation material and preparation method thereof

A technology of encapsulation and thermoplastic elastomer, which is applied in the field of POM encapsulation materials and its preparation, can solve problems such as poor adhesion, achieve the effects of improved cohesion, reduced system cost, and simplified process

Active Publication Date: 2012-10-03
昆山聚威工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor adhesion between the existing POM rubber coating material and POM. By using styrene thermoplastic elastomer as the base material and injection molding with a two-color mold in the process, the true coating effect can be achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Thermoplastic Elastomer 50 parts

[0025] 30 parts plasticizer

[0026] PP 10 parts

[0027] Compatibilizer 5 parts

[0028] Auxiliary 0.5 parts

[0029] Use a twin-screw extruder to granulate and extrude at a temperature range of 180°C to 200°C. The prepared material has a tensile strength of 20MPa, a hardness of 78A, and an elongation of 520%. The material has a good encapsulation effect with POM.

Embodiment 2

[0031] Thermoplastic Elastomer 50 parts

[0032] Plasticizer (white oil) 35 parts

[0033] PP 10 parts

[0034] Compatibilizer 8 parts

[0035] Auxiliary 0.5 parts

[0036] Use a twin-screw extruder to granulate and extrude at a temperature range of 180°C to 200°C. The prepared material has a tensile strength of 18MPa, a hardness of 75A, and an elongation of 560%. The material has a good effect of encapsulation with POM.

Embodiment 3

[0038] Thermoplastic elastomer 60 parts

[0039] Plasticizer (white oil) 40 parts

[0040] PP 15 parts

[0041] Compatibilizer 10 parts

[0042] Auxiliary 0.8 parts

[0043] Use a twin-screw extruder to granulate and extrude at a temperature range of 180°C to 200°C. The prepared material has a tensile strength of 19MPa, a hardness of 72A, and an elongation of 650%. The material has a good effect of encapsulation with POM.

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Abstract

The invention belongs to the field of composite materials, and discloses a polyoxymethylene (POM) encapsulation material and a preparation method thereof. The POM encapsulation material comprises the following components in part by weight: 50 to 60 parts of thermoplastic elastomer (TPE), 30 to 40 parts of plasticizer, 10 to 15 parts of propene polymer (PP), 5 to 10 parts of compatibilizer, and 0.5 to 1 part of other aid. A twin-screw extruder is used for pelleting and extrusion, and the temperature range is 180 to 200 DEG C. Compared with that of the prior art, the cohesiveness between a product and POM is obviously improved, so that by a multi-component injection method, the encapsulation material is widely applied to POM / TPE combination, mechanical anchoring such as expensive undercutting is not needed, the process is simplified, the development period of the product is shortened, and cost is reduced.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a POM encapsulation material and a preparation method thereof. Background technique [0002] Polyoxymethylene refers to a class of weakly polar linear thermoplastic polymers containing oxymethylene repeating structural units in the molecular chain. Its scientific name is polyoxymethylene, and its English name is Polyacetal or Polyoxymethylene, referred to as POM. In general, POM has high mechanical strength and comprehensive performance, and is an excellent engineering plastic. Widely used in automobiles, household appliances, equipment, mechanical structures, tools, electronics and consumables industries. In particular, it is used for many moving parts such as gear elements, deflecting pulleys, ratchets or adjusting levers due to its good sliding friction, and for quick connections due to its excellent resilience. [0003] Overmolding is a process of multiple inj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L53/00C08L23/10C08L51/00C08L23/16C08L59/00
Inventor 王晶王凯张天荣王健李杰
Owner 昆山聚威工程塑料有限公司
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