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Thermoplastic elastomer foamed door seal strip and preparation method thereof

A technology of thermoplastic elastomer and foam door, which is applied in the field of preparation of thermoplastic elastomer foam door seals, which can solve the problems of high transportation conditions, slow recovery of surface deformation, and large specific gravity, and achieve a wide range of hardness and compression recovery. Good, good elasticity

Inactive Publication Date: 2017-12-22
ANHUI HIGASKET PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermoplastic elastomer refrigerator door seals solve most of the problems existing in PVC refrigerator door seals, but there are still problems such as large specific gravity, slow recovery of surface deformation, high cost, and high requirements for transportation conditions, which have a great impact on its further popularization and application. big constraints

Method used

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  • Thermoplastic elastomer foamed door seal strip and preparation method thereof
  • Thermoplastic elastomer foamed door seal strip and preparation method thereof
  • Thermoplastic elastomer foamed door seal strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one, with reference to figure 1 The door seal material is weighed according to the following material parts: 110 parts of styrene elastomer, 30 parts of high-density polyethylene, 40 parts of polypropylene, 90 parts of filler oil (choose naphthenic oil), 80 parts of mineral filler (choose calcium carbonate) 50 parts of lubricant, 3 parts of coupling agent, 0.4 part of antioxidant, 0.8 part of crosslinking agent, 2.5 parts of foaming agent (microsphere foaming agent in physical foaming agent).

[0021] Mix styrene-based elastomer and naphthenic oil in a high-speed mixer for oil extension, then add the remaining materials step by step according to the components, and mix well to obtain powder. The above-mentioned mixed powder is extruded and granulated by a twin-screw extruder. When the twin-screw extruder is extruded and granulated, the vacuum port and the vent hole must be closed, and the melt pump should be turned off to minimize the material in the screw. ...

Embodiment 2

[0023] Embodiment two, refer to figure 2 The door seal material is weighed according to the following material parts: 110 parts of styrene elastomer, 30 parts of high-density polyethylene, 40 parts of polypropylene, 90 parts of filler oil (choose naphthenic oil), 80 parts of mineral filler (choose calcium carbonate) 5 parts, lubricant 5 parts, coupling agent 3 parts, antioxidant 0.3 parts, crosslinking agent 0.5 parts, foaming agent (select chemical foaming agent) 1.2 parts.

[0024] Mix styrene-based elastomer and naphthenic oil in a high-speed mixer for oil extension, then add the remaining materials step by step according to the components, and mix well to obtain powder. The above-mentioned mixed powder is extruded and granulated by a twin-screw extruder. When the twin-screw extruder is extruded and granulated, the vacuum port and the vent hole must be closed, and the melt pump should be turned off to minimize the material in the screw. The residence time, the speed of th...

Embodiment 3

[0026] Embodiment three, refer to image 3 The door seal material is weighed according to the following material parts: 110 parts of styrene elastomer, 30 parts of high-density polyethylene, 40 parts of polypropylene, 90 parts of filler oil (choose naphthenic oil), 80 parts of mineral filler (choose calcium carbonate) part, 5 parts of lubricant, 3 parts of coupling agent, 0.6 part of antioxidant, 0.5 part of crosslinking agent, foaming agent (select 0.6 part of microsphere foaming agent in physical foaming agent, select 0.4 part of chemical foaming agent ) 1 serving.

[0027] Mix styrene-based elastomer and naphthenic oil in a high-speed mixer for oil extension, then add the remaining materials step by step according to the components, and mix well to obtain powder. The above-mentioned mixed powder is extruded and granulated by a twin-screw extruder. When the twin-screw extruder is extruded and granulated, the vacuum port and the vent hole must be closed, and the melt pump sh...

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Abstract

The invention discloses a thermoplastic elastomer foamed door seal strip and a preparation method thereof. The thermoplastic elastomer foamed door seal strip is characterized by being prepared from the following materials for preparation in parts by weight: 60 to 110 parts of styrene elastomer, 10 to 30 parts of high-density polyethylene, 10 to 40 parts of polypropylene, 60 to 110 parts of filling oil, 30 to 80 parts of mineral filler, 1 to 5 parts of lubricant, 1 to 5 parts of coupling agent, 0.1 to 2 parts of antioxidant, 0 to 5 parts of crosslinking agent and 1 to 8 parts of foaming agent. The preparation method is as follows: the styrene elastomer and the filling oil among the materials according to parts by weight are first sufficiently mixed for absorption, the other components are then added and uniformly mixed, the uniformly mixed materials are extruded by a double-screw extruder for pelletization, and the pelletized material is sent into a single-screw extruder and extruded out to be shaped. According to the preparation method, in the process of production, no wastewater and waste gas are produced, no solvents are discharged, halogen is not contained, scraps can be recycled, and a product has the advantages of good elasticity, high strength, good compressive resilience, low specific gravity, adjustable density, smooth surface and good welding effect.

Description

technical field [0001] The invention relates to the field of a thermoplastic elastomer foamed door seal and its preparation method, in particular to a thermoplastic elastomer foamed door seal and its preparation method. Background technique [0002] At present, the door seals of household refrigerators in the domestic market are mostly made of polyvinyl chloride resin. However, refrigerator door seals made of polyvinyl chloride have poor low temperature resistance and aging resistance on the one hand, and poor hand feeling at low temperatures; on the other hand, the compensation is not good. The energy saving effect is poor. In order to achieve the effect of soft door seals made of PVC refrigerator door seals, a large amount of plasticizers will be added during the production process. The door seal has high density, poor environmental protection performance, and inconvenient transportation and use. [0003] In recent years, thermoplastic elastomer refrigerator door seals ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/06C08L23/12C08K13/02C08K3/26C08J9/32B29C47/92B29C48/92
CPCC08L53/025B29C48/92B29C2948/92704C08J9/32C08J2353/02C08J2423/12C08K2003/265C08L2201/08C08L2203/14C08L2205/025C08L2205/035C08L2207/04C08L2207/062C08L23/06C08L23/12C08K13/02C08K3/26
Inventor 时乾中魏锋潘成
Owner ANHUI HIGASKET PLASTICS CO LTD
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