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Thermoplastic elastomer material for refrigerator sealing strip and preparation method thereof

A thermoplastic elastomer and sealing strip technology, applied in the field of thermoplastic elastomer materials, can solve the problems of poor surface fineness, poor melt strength, poor dimensional accuracy, etc., and achieve flexible product design, good welding performance, and good dimensional accuracy. and surface fineness

Active Publication Date: 2012-09-19
SUNGALLON PLASTICS SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide a thermoplastic elastomer material for refrigerator sealing strips with high melt strength, fine surface and high dimensional accuracy and its preparation method for the problems of poor melt strength, poor surface fineness, and poor dimensional accuracy.

Method used

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  • Thermoplastic elastomer material for refrigerator sealing strip and preparation method thereof
  • Thermoplastic elastomer material for refrigerator sealing strip and preparation method thereof
  • Thermoplastic elastomer material for refrigerator sealing strip and preparation method thereof

Examples

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preparation example Construction

[0052] see figure 1 , the preparation method of the thermoplastic elastomer material for refrigerator sealing strip of an embodiment, comprises the following steps:

[0053] Step S100, put 20-40 parts by weight of SEBS into a horizontal mixer, evenly add 20-45 parts by weight of mineral oil, stir for 5-15 minutes, pack the mixture, and place it for more than 4 days;

[0054] Step S200, put the mixture into the horizontal mixer, add 20-50 parts by weight of polyethylene and 10-30 parts by weight of polyolefin alloy thermoplastic elastomer, and stir for 3-7 minutes;

[0055] Step S300, adding 5-20 parts by weight of mineral filler, 0.5-2 parts by weight of ultraviolet absorber, and 0.5-2 parts by weight of anti-fungal agent, stirring for 5-15 minutes until uniformly mixed to obtain a premix; and

[0056] Step S400, putting the premix in a twin-screw extruder to extrude and pelletize to obtain a thermoplastic elastomer material for refrigerator sealing strips.

[0057] Preferab...

Embodiment 1

[0065] Put 33 parts by weight of SEBS YH503 into a horizontal mixer, evenly add 32 parts by weight of mineral oil KNH4006, stir for 10 minutes, pack the mixture and let it stand for 4 days.

[0066] Put the mixture into a horizontal mixer, add 18 parts by weight of LLDPE7042, 5 parts by weight of HDPE5000S and 10 parts by weight of GP610-85, and stir for 5 minutes.

[0067] Add 10 parts by weight of calcium carbonate, 0.3 parts by weight of antioxidant 168, 0.3 parts by weight of antioxidant 1076, 0.5 parts by weight of UV-P, 0.5 parts by weight of DAW502 and 2 parts by weight of MB50-001, stir for 10 minutes until uniformly mixed, and obtain the prepared mixture.

[0068] The premix is ​​placed in a twin-screw extruder, extruded and pelletized to obtain a thermoplastic elastomer material for refrigerator sealing strips.

Embodiment 2

[0070] Put 35 parts by weight of SEBS YH503 into a horizontal mixer, evenly add 32 parts by weight of mineral oil KNH4006, stir for 8 minutes, pack the mixture and let it stand for 5 days.

[0071] Put the mixture into a horizontal mixer, add 20 parts by weight of LLDPE7042, 4 parts by weight of HDPE5000S and 15 parts by weight of GP610-85, and stir for 5 minutes.

[0072] Add 12 parts by weight of gypsum powder, 0.3 parts by weight of antioxidant 168, 0.3 parts by weight of antioxidant 1076, 0.5 parts by weight of UV-P, 0.5 parts by weight of DAW502 and 2 parts by weight of MB50-001, stir for 8 minutes until the mixture is uniform, and obtain the prepared mixture.

[0073] Pour the premix into the hopper of a co-rotating twin-screw extruder, shear and disperse through the co-rotating twin-screw, pelletize, pass through a vibrating sieve, blow dry, cool, and pack to obtain a thermoplastic Elastomer material.

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Abstract

The invention provides a thermoplastic elastomer material for refrigerator sealing strip and a preparation method thereof. The thermoplastic elastomer material for the refrigerator sealing strip comprises the following components in parts by weight: 20-40 parts of SEBS (Styrene-Ethylene-Butadiene-Styrene), 20-45 parts of mineral oil, 20-50 parts of polyethylene, 5-20 parts of a mineral filler, 10-30 parts of a polyolefin alloy thermoplastic elastomer, 0.5-2 parts of an ultraviolet absorber and 0.5-2 parts of a mildew preventive. The thermoplastic elastomer material for the refrigerator sealing strip has the advantages of low density, environment friendliness, surface smoothness, soft handfeel, simple processing technic, high welding performance, flexible product design, excellent cold resistance, excellent heat resistance, higher size accuracy and higher surface fineness, and is more suitable for extruded profiled bars and refrigerator sealing strip products with air blowing requirements.

Description

technical field [0001] The invention relates to the field of thermoplastic elastomer materials, in particular to a thermoplastic elastomer material for refrigerator sealing strips and a preparation method thereof. Background technique [0002] The first generation of refrigerator sealing strip products are thermosetting elastomer materials, which have many advantages such as high temperature resistance, oil resistance, solvent resistance, and low compression set, but have the disadvantages of difficult coloring, difficult processing, and non-recyclable. [0003] The second-generation refrigerator sealing strip product is PVC (polyvinyl chloride) material. PVC is a very good material because it is durable, cheap, very slow in aging and degradation, stable in chemical properties, neutral and non-toxic. However, due to the environmental protection of PVC sealing strips, the harmfulness of the processing and post-treatment of PVC sealing strips, and the poor low temperature resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L91/00C08L23/06C08L23/08C08L23/00C08K13/02C08K3/26C08K3/34C08K3/30
Inventor 李文星邱廷模
Owner SUNGALLON PLASTICS SHENZHEN CO LTD
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