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Thermoplastic vulcanizate (TPV) magnetic door seal and manufacture method thereof

A door seal and magnetic technology, which is applied in the field of TPV magnetic door seal and its preparation, can solve the problems of discoloration of door seal rubber sleeve, poor low-temperature elastic performance of soft PVC door seal, cracking of door liner, etc., and achieves wide application temperature range , Excellent stability in use, avoiding the effect of poor sealing

Active Publication Date: 2013-02-13
ANHUI HIGASKET PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by the characteristics of the PVC material itself, there will be the following deficiencies during use and installation: (1) Its low temperature resistance is poor, and the PVC rubber sleeve will feel hard below 0°C, and it will change below -25°C. It is brittle and is obviously affected by the ambient temperature. For every ±10°C change in room temperature, its Shore A hardness will change by ±2 to 3 degrees. Therefore, the temperature difference between summer and winter will easily affect the sealing performance of refrigerator door seals; ( 2) The low-temperature elastic performance of soft PVC door seals is poor, and low-temperature environments are likely to cause phenomena such as poor sealing and cold leakage, thus affecting the cooling effect of refrigerators and increasing energy consumption; (3) The anti-migration performance of PVC material door seals is relatively low. Poor, the plasticizer in the door seal migrates to the HIPS, ABS refrigerator door liner or the polyester paint surface of the refrigerator, resulting in cracking of the door liner or corrosion of the paint surface, and may cause adhesion in severe cases; (4 ) The anti-aging performance of the PVC material sealing strip is not ideal. With the extension of use time, the door seal rubber sleeve may change color and age and harden, which will affect the appearance and service life.

Method used

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  • Thermoplastic vulcanizate (TPV) magnetic door seal and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 58.5 parts of EPDM, 25 parts of polypropylene, 18 parts of naphthenic oil, 1.2 parts of environmentally friendly BIPB, 1.5 parts of PE wax, 8 parts of hydrotalcite, and 4 parts of titanium dioxide for mixing, and then carry out high-speed mixing and oil extension for 10 Minutes later, melt and blend through a single-screw extruder at 150-167°C, and perform dynamic vulcanization at 170-195°C to make TPV elastic pellets for use; add TPV elastic pellets to the single-screw extruder and extrude Sealing rubber sleeve, after cooling and shaping, cut the door sealing rubber sleeve at 45 degrees according to the predetermined size, then insert magnetic strips into the door sealing rubber sleeve, place it for more than 12 hours, and melt and weld it to make TPV material Magnetic door seal.

[0041]

Embodiment 2

[0043] Weigh 55 parts of EPDM, 27 parts of polypropylene, 16 parts of naphthenic oil, 1.2 parts of dicumyl peroxide, 1.5 parts of PE wax, 12.5 parts of superfine calcium carbonate, and 1 part of carbon black for mixing, and then carry out After high-speed mixing and oil filling for 15 minutes, melt and blend through a single-screw extruder at 150-167°C, and perform dynamic vulcanization at 170-195°C to make TPV elastic pellets for later use; add TPV elastic pellets to single-screw extrusion The door seal rubber sleeve is extruded in the machine, after cooling and shaping, the door seal rubber sleeve is cut at 45 degrees according to the predetermined size, and then the magnetic strip is inserted into the door seal rubber sleeve, and it is placed for more than 12 hours, and it is melted and welded. That is to say, it is made of TPV material magnetic door seal.

[0044]

Embodiment 3

[0046] Weigh 60 parts of EPDM, 30 parts of polypropylene, 13 parts of naphthenic oil, 0.7 parts of environmentally friendly BIPB, 1.2 parts of stearic acid, 15 parts of hydrotalcite, and 0.2 parts of phthalocyanine blue, and mix them at 150-167 °C Melt and blend through a single-screw extruder and make TPV elastic pellets after dynamic vulcanization at 170-195°C for use; add TPV elastic pellets to the single-screw extruder to extrude the door seal rubber sleeve, after cooling and shaping According to the predetermined size, the door seal rubber sleeve is cut at 45 degrees, and then the magnetic strip is inserted into the door seal rubber sleeve, placed for more than 12 hours, and it is melted and welded to make a TPV material magnetic door seal.

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Abstract

The invention provides a thermoplastic vulcanizate (TPV) magnetic door seal and a manufacture method thereof. The TPV magnetic door seal comprises a TPV elastomer door seal rubber sleeve which is composed of ethylene-propylene-diene monomer (EPDM), polypropylene, naphthenic oil, cross-linking agents, lubricants and fillers. The TPV magnetic door seal contains highly vulcanized EPDM particles, so that the TPV magnetic door seal has good elasticity, compression deformation resistance and ageing resistance, and the application temperature range is wide (ranging from -60 DEG C to 150 DEG C). The TPV magnetic door seal has excellent using stability, prevents the phenomena of infirm sealing, cold leakage and the like, improves mechanical property and prolongs the service life.

Description

[0001] technical field [0002] The invention belongs to the technical field of magnetic door seals for refrigerators, freezers and other electrical appliances, and in particular relates to a magnetic door seal made of TPV and a preparation method thereof. [0003] technical background [0004] Due to sealing requirements, magnetic door seals are used for the opening and closing of doors such as refrigerators and freezers. Most of the door seals are made of soft PVC and magnetic strips. Affected by the characteristics of the PVC material itself, there will be the following deficiencies during use and installation: (1) Its low temperature resistance is poor, and the PVC rubber sleeve will feel hard below 0°C, and it will change below -25°C. It is brittle and is obviously affected by the ambient temperature. For every ±10°C change in room temperature, its Shore A hardness will change by ±2 to 3 degrees. Therefore, the temperature difference between summer and winter will eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/12C08K13/02C08K5/01C08K5/14C08K5/17C08K5/09C08K3/26F25D23/02
Inventor 时乾中
Owner ANHUI HIGASKET PLASTICS CO LTD
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