Polyvinyl chloride sealing strip composition for refrigerator

A technology of polyvinyl chloride and sealing strips, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of decreased sealing performance of sealing strips, affecting the service life of materials, poor durability of sealing strips, etc., and can reduce the mold expansion ratio , Inhibit thermal oxygen aging effect, good extraction resistance

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of material contains more olefin components and aromatic components. The disadvantage is that the oil resistance is poor, and it is easy to be swollen and deformed or packaged by the edible oil in contact with food, which will reduce the sealing performance of the sealing strip and affect the durability of the material. service life
[0005] The application of refrigerator sealing strips has been very common. However, the research on materials for this product is still insufficient. At present, the service life of a refrigerator in China is about 10 years, and the power consumption of refrigerators will increase significantly after 4 to 5 years. The main reason is that the material of the sealing strip is not good, which leads to poor durability of the sealing strip, and long-term use will cause a decrease in resilience, insufficient sealing, and a decrease in airtightness.

Method used

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  • Polyvinyl chloride sealing strip composition for refrigerator
  • Polyvinyl chloride sealing strip composition for refrigerator
  • Polyvinyl chloride sealing strip composition for refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16

[0025] Examples 1 to 16 are the compositions of polyvinyl chloride sealing strips for refrigerators according to the present invention. See Tables 1 to 3 for the proportioning components. Among them, the stabilizer RUP-129 is a high-efficiency non-toxic calcium zinc stabilizer, and the antioxidant 1010 is tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythyl ester; The oxygen agent DSTDP is bis(octadecyl)thiodipropionate, acetyl tri-n-butyl citrate is abbreviated as ATBC, and stearic acid is abbreviated as HST. Embodiment 8 is the best implementation mode.

[0026] Table 1 Example 1-5 Refrigerator polyvinyl chloride sealing strip composition (by weight)

[0027]

Embodiment 6～10

[0028] Table 2 Example 6-10 Polyvinyl chloride sealing strip compositions for refrigerators (by weight)

[0029]

[0030] Table 3 Example 11-16 Polyvinyl chloride sealing strip compositions for refrigerators (by weight)

[0031]

[0032] The preparation method of embodiment 1~16:

[0033] 1) Material mixing process: mix polyvinyl chloride, plasticizer, modified ethylene vinyl acetate copolymer, thermoplastic polyurethane elastomer, heat stabilizer, lubricant, antioxidant, and filler in a high and low speed mixing unit until The mixing temperature is 110°C to 120°C. Put the material into the low-speed mixer, cool down while mixing, and discharge the material when the temperature of the material is cooled to 40°C to obtain the mixed material;

[0034] 2) Granulation process: The mixed materials are granulated by a twin-screw extruder. The process parameters are shown in Table 4. After granulation, it is air-cooled, granulated, measured, and packaged to form a combination ...

Embodiment 8

[0056] Table 8 embodiment 8 by the detection performance result of sealing strip standard

[0057]

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Abstract

The invention discloses a polyvinyl chloride sealing strip composition for a refrigerator, belongs to the field of processing and application of macromolecular materials, and mainly relates to a polyvinyl chloride sealing strip composition for a refrigerator. The polyvinyl chloride sealing strip composition is prepared from the following components in parts by weight: 100 parts of polyvinyl chloride, 35-55 parts of a plasticizer, 20-35 parts of modified ethylene vinyl acetate copolymer, 28-42 parts of a thermoplastic polyurethane elastomer, 2-8 parts of a thermal stabilizer, 0.5-1.2 parts of a lubricant, 0.4-0.8 part of an antioxidant and 9-44 parts of a filling agent. A polyvinyl chloride sealing strip, produced from the polyvinyl chloride sealing strip composition, for a refrigerator is cold-resistant and oil-resistant, has good elastic resilience and durability, and is of great significance in energy conservation and consumption reduction.

Description

technical field [0001] A polyvinyl chloride sealing strip composition for refrigerators belongs to the field of processing and application of polymer materials. Background technique [0002] Polyvinyl chloride (PVC) is a plastic material with the largest output and the cheapest price in China at present. Since PVC material can be used for hard products, it can also be used for soft products after adding plasticizers. It has excellent performance and is widely used. . Therefore, in the field of sealing materials for refrigerators, freezers, incubators, and residential doors and windows, soft polyvinyl chloride materials are still the main material at present. However, at present, the sealing strips based on polyvinyl chloride still have many defects in use, such as The produced sealing strip has poor resilience, insufficient low temperature resistance of the material, and low oil resistance. [0003] Chinese invention patent CN1233725C discloses "a soft polyvinyl chloride c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L75/08C08L73/00C08K13/02C08K3/22C08K3/26C08K5/11C09K3/10
Inventor 李静贾小波张桦刘容德刘浩孙培培桂俊杰高磊盛梅王晶张新华
Owner CHINA PETROLEUM & CHEM CORP
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