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Thermoplastic elastomer refrigerator door sealing strip material and preparation method

A thermoplastic elastomer and refrigerator door technology, which is applied in the field of refrigerator door seal materials and preparation, can solve the problems of slow recovery of surface deformation, high requirements for transportation conditions, poor processing and molding effects, etc., and achieve fast recovery of surface deformation, wide range of hardness, The effect of convenient preparation and processing

Inactive Publication Date: 2018-11-13
ANHUI HIGASKET PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing refrigerator door seals made of thermoplastic elastomers use hydrogenated styrene-butadiene-styrene block copolymer (SEBS), which has poor compatibility with polypropylene.
When making refrigerator door seals, the processing and forming effect is poor, the anti-crease effect is poor, the recovery of surface deformation is slow, and the transportation conditions are relatively high.
The above-mentioned shortcomings seriously limit the scope of further popularization and application of such thermoplastic elastomer materials.

Method used

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  • Thermoplastic elastomer refrigerator door sealing strip material and preparation method
  • Thermoplastic elastomer refrigerator door sealing strip material and preparation method
  • Thermoplastic elastomer refrigerator door sealing strip material and preparation method

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preparation example Construction

[0020] Adopt the preparation method of above-mentioned a kind of thermoplastic elastomer refrigerator door seal material, its concrete steps are:

[0021] Step 1: Weighing: Accurately weigh each component according to the range of parts in claim 1;

[0022] Step 2: Uniform mixing: Use a high-speed mixer to mix accurately weighed hydrogenated styrene isoprene (SEPS) or styrene-butadiene-styrene (SBS) or a mixture of both with equal proportions of filler oil , after fully mixing and absorbing the mixture, add other components in claim 1, and mix evenly to obtain powder;

[0023] Step 3: Granulation: Use a twin-screw extruder to extrude and granulate the mixed powder. The parameters of the twin-screw extruder are set to 150°C for the first zone, 155°C for the second zone, and 155°C for the third zone. The temperature of the fourth zone is 160°C, the temperature of the fifth zone is 165°C, the temperature of the sixth zone is 170°C, the temperature of the seventh zone is 170°C, t...

Embodiment 1

[0026] Refrigerator door seal material among the present invention is weighed by following material parts:

[0027]

[0028]

[0029] Mix SEPS, SBS and naphthenic oil in equal proportions in a high-speed mixer fully, after mixing, add the remaining components into the high-speed mixer step by step, and get powder after mixing evenly;

[0030] Extrude and granulate the above-mentioned mixed powder through a twin-screw extruder to minimize the residence time of the material in the screw. Gradually increase, and the temperature reaches the highest at the die at the rear end of the twin-screw extruder. The parameters of the twin-screw extruder are set to 150°C for the first zone, 155°C for the second zone, 160°C for the third zone, and 160°C for the fourth zone. The temperature of zone 160°C, the temperature of zone 5 is 165°C, the temperature of zone 6 is 170°C, the temperature of zone 7 is 170°C, the temperature of zone 8 is 175°C, the temperature of zone 11 is 175°C, and ...

Embodiment 2

[0037] Refrigerator door seal material among the present invention is weighed by following material parts:

[0038]

[0039]

[0040] Mix SEPS, SBS and naphthenic oil in equal proportions in a high-speed mixer fully, after mixing, add the remaining components into the high-speed mixer step by step, and get powder after mixing evenly;

[0041] Extrude and granulate the above-mentioned mixed materials through a twin-screw extruder to minimize the residence time of the materials in the screw. As the temperature rises, the temperature reaches the highest at the die at the rear end of the twin-screw extruder. The parameters of the twin-screw extruder are set to 150°C for zone 1, 155°C for zone 2, 160°C for zone 3, and 160°C for zone 4. The temperature is 160°C, the temperature in the fifth zone is 165°C, the temperature in the sixth zone is 170°C, the temperature in the seventh zone is 170°C, the temperature in the eighth zone is 175°C, the temperature in the eleventh zone is...

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Abstract

The invention discloses a thermoplastic elastomer refrigerator door sealing strip material and a preparation method. The thermoplastic elastomer refrigerator door sealing strip material is prepared from the following materials of SEPS (hydrogenated styrene-isoprene) and / or SBS (styrene-butadiene-styrene), LLDPE (linear low density polyethylene), regular polypropylene, filling oil, mineral filler,a lubricant, a coupling agent and an antioxidant. The preparation method of the thermoplastic elastomer refrigerator door sealing strip comprises the following steps of weighing, uniformly mixing, granulating, extruding and forming. The thermoplastic elastomer refrigerator door sealing strip has the advantages that the problem in the refrigerator door sealing strip material using PVC (polyvinyl chloride), TPV (thermoplastic vulcanizate) and the like as the substrates on market is solved; the cold-resistant property is good, the elasticity is good, the deformation recovery ability is strong, the sealing effect is good, the non-toxic and environment-friendly effects are realized, and the recycling effect is realized; the hardness range is broad, the anti-crease effect is good, the dry and fresh effects are realized, the hand feel is comfortable, and any foreign odor is avoided.

Description

technical field [0001] The invention relates to the field of a refrigerator door seal material and a preparation method, in particular to a thermoplastic elastomer refrigerator door seal material and a preparation method. Background technique [0002] Most of the door seals of domestic refrigerators in the domestic market are made of polyvinyl chloride (PVC) resin. Household refrigerator door seals made of polyvinyl chloride (PVC) 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, and refrigerators using such door seals are prone to cold leakage. , The energy saving effect is poor. In addition, in order to achieve the soft effect of the door seal, a large amount of plasticizer will be added in the production process of the household refrigerator door seal. On the one hand, these plasticizers are easy to migrate and corrode the inner liner of the refrigerator;...

Claims

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Application Information

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IPC IPC(8): C08L91/00C08L53/02C08L23/08C08L23/12C08K3/26
CPCC08L91/00C08K2003/265C08L2205/02C08L2205/035C08L53/02C08L53/025C08L23/0815C08L23/12C08K3/26
Inventor 潘成魏锋刘瑞许稳强张远
Owner ANHUI HIGASKET PLASTICS CO LTD
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