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A kind of refrigerator sealing strip material and preparation method thereof

A technology for sealing strips and refrigerators, applied in the field of thermoplastic elastomer materials, which can solve the problems of difficult to obtain sealing materials for refrigerators, poor solvent resistance, poor oil resistance, small permanent deformation, etc., achieve good resilience, improve oil resistance and resistance Solvent property, effect of lowering interfacial tension

Active Publication Date: 2018-10-26
宁波日樱电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermoplastic elastomers based on polystyrene-polyethylene-polybutylene-polystyrene copolymers not only have good rubber elasticity and relatively small permanent deformation, but also have good weather resistance, low temperature resistance, Coloring performance, however, the solvent resistance and oil resistance of polystyrene-polyethylene-polybutylene-polystyrene copolymer are not as good as PVC and traditional vulcanized rubber, and polystyrene-polyethylene-polybutylene-polystyrene The rigidity of the copolymer itself is too large. Therefore, in the prior art, the application of polystyrene-polyethylene-polybutylene-polystyrene copolymer to the sealing strip material for refrigerators is restricted by the above factors, and it is difficult to obtain better overall performance. sealing material for refrigerators

Method used

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  • A kind of refrigerator sealing strip material and preparation method thereof
  • A kind of refrigerator sealing strip material and preparation method thereof
  • A kind of refrigerator sealing strip material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The refrigerator sealing strip material of the present embodiment comprises the following components by weight:

[0035]

[0036]

[0037] Wherein, the weight ratio of PP to PE in the mixture of PP and PE materials is 0.7:1.

[0038] The preparation method of the above-mentioned refrigerator sealing strip material comprises the following steps:

[0039] (1) Preparation of compatibilizer

[0040]Carry out electron beam pre-irradiation to 60g linear low density polyethylene, the irradiation dose is 10kGy, and the irradiation time is 8min;

[0041] Sprinkle 2g of methacryloxysilane evenly on the surface of the linear low density polyethylene after pre-irradiation, and stir in a mixer at a speed of 1000r / min for 10min to obtain a mixture A;

[0042] Add 2g glycidyl methacrylate, 8g polystyrene-polyethylene-polybutylene-polystyrene copolymer and 5g polyethylene glycol to mixture A, and stir for 20min at a speed of 1000r / min in the mixer , to obtain mixture B; in thi...

Embodiment 2

[0049] The refrigerator sealing strip material of the present embodiment comprises the following components by weight:

[0050]

[0051] Wherein, the weight ratio of PP to PE in the mixture of PP and PE materials is 0.9:1.

[0052] The preparation method of the above-mentioned refrigerator sealing strip material comprises the following steps:

[0053] (1) Preparation of compatibilizer

[0054] Carry out electron beam pre-irradiation to 70g linear low density polyethylene, the irradiation dose is 20kGy, and the irradiation time is 7min;

[0055] Sprinkle 6g of methacryloxysilane evenly on the surface of the linear low density polyethylene after pre-irradiation, and stir for 7min at a speed of 2000r / min in a mixer to obtain a mixture A;

[0056] Add 5g glycidyl methacrylate, 15g polystyrene-polyethylene-polybutylene-polystyrene copolymer and 2g polyethylene glycol to mixture A, and stir for 18min at a speed of 2000r / min in the mixer , to obtain mixture B; in this step, the...

Embodiment 3

[0063] The refrigerator sealing strip material of the present embodiment comprises the following components by weight:

[0064]

[0065] Wherein, the weight ratio of neutral alumina to nano titanium dioxide is 1:2; the weight ratio of PP to PE in the mixture of PP and PE materials is 2.3:1.

[0066] The preparation method of the above-mentioned refrigerator sealing strip material comprises the following steps:

[0067] (1) Preparation of compatibilizer

[0068] Carry out electron beam pre-irradiation to 80g linear low density polyethylene, the irradiation dose is 30kGy, and the irradiation time is 6min;

[0069] Sprinkle 1g of methacryloxysilane evenly on the surface of the linear low density polyethylene after pre-irradiation, and stir in a mixer at a speed of 3000r / min for 5min to obtain mixture A;

[0070] Add 8g glycidyl methacrylate, 10g polystyrene-polyethylene-polybutylene-polystyrene copolymer and 4g polyethylene glycol to mixture A, and stir for 15min at a speed ...

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Abstract

A refrigerator sealing strip material and a preparation method thereof are disclosed. The refrigerator sealing strip material is characterized by comprising the following components in parts by weight: 15 to 40 parts of polystyrene-polyethylene-polybutene-polystyrene copolymer, 5 to 30 parts of TPU, 10 to 40 parts of mixture composed of PP and PE, 5 to 15 parts of ethylene-vinyl acetate copolymer, 8 to 28 parts of inorganic minerals, 5 to 20 parts of naphthenic oil HYN-1, 1 to 8 parts of antioxidant, and 2 to 12 parts of compatilizer. The invention further relates a preparation method of the refrigerator sealing strip material. The polystyrene-polyethylene-polybutene-polystyrene copolymer and TPU are taken as the basic materials, a mixture composed of PP and PE is mixed with the basic materials, the groups in the TPU molecular chain such as carbamate, isocyanate, and the like will be inserted into the polystyrene-polyethylene-polybutene-polystyrene, and thus the polystyrene-polyethylene-polybutene-polystyrene copolymer and TPU are stuck together, so the oil resistant performance and solvent resistant property of the material are largely improved, and at the same time, the material has good resilience.

Description

technical field [0001] The invention relates to the technical field of thermoplastic elastomer materials, specifically a thermoplastic elastomer material used for refrigerator sealing strips, and the invention also relates to a preparation method of the refrigerator sealing strip material. Background technique [0002] The sealing strip of the refrigerator determines the refrigeration and heat insulation effect of the refrigerator. Generally, the sealing strip of the refrigerator must be elastic to play a sealing role. Therefore, the design of various refrigerator sealing strips is developed around the elastic rubber material. The first generation of refrigerator sealing strip products are thermosetting elastic materials, which have many advantages such as oil resistance, high temperature resistance, and not easy to deform. However, there are disadvantages such as complicated processing technology, high energy consumption, non-recyclable, and not environmentally friendly. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08L23/12C08L23/06C08L75/04C08L23/08C08L51/06C08K13/02C08K3/22
Inventor 沈宝庆
Owner 宁波日樱电器有限公司
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