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TPE (Thermoplastic Elastomer) gasket material for resisting content migration as well as preparation and processing methods of TPE gasket material

A content and gasket technology, which is applied to the TPE gasket material that resists content migration and its preparation and processing, can solve the problems of reducing the overall mechanical properties and structural strength, changing the structural shape of TPE thermoplastic elastomers, etc., and achieving improvement Effect of content migration resistance, excellent mechanical properties and processing fluidity, and balanced properties

Pending Publication Date: 2021-08-13
JIANGSU TOP POLYMER ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that the current food content contains oil or alcohol substances. When the TPE thermoplastic elastic material is directly used, because the content such as oil and alcohol is in contact with the styrene embedded in the TPE thermoplastic elastic material. After the block copolymer and white oil and other components, the content can easily infiltrate the components in the TPE thermoplastic elastomer, thereby penetrating into the TPE thermoplastic elastomer; because the styrene block copolymer and white oil continuously absorb the infiltrated content It causes the volume of TPE thermoplastic elastomer to gradually expand, which changes the structural shape of TPE thermoplastic elastomer, thereby reducing its overall mechanical properties and structural strength.

Method used

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  • TPE (Thermoplastic Elastomer) gasket material for resisting content migration as well as preparation and processing methods of TPE gasket material
  • TPE (Thermoplastic Elastomer) gasket material for resisting content migration as well as preparation and processing methods of TPE gasket material
  • TPE (Thermoplastic Elastomer) gasket material for resisting content migration as well as preparation and processing methods of TPE gasket material

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0051] Matrix preparation: Add 0.1kg of accelerator TETD and 1kg of zinc stearate to 40kg of olefin block copolymer, stir and mix and place at 200°C for mastication for 15 minutes to collect the mastication matrix glue;

[0052] Compatibility modification: Stir and mix 5 kg of molten poly-4-methylpentene-1 particles and 30 kg of plasticized base rubber and place it in a torque rheometer at 100°C, stir and mix, heat-preserve and vulcanize, collect the vulcanized rubber and open Refining treatment, standing still and then crushing through a 200-mesh sieve to prepare modified rubber elastomer 1.

preparation example 2

[0054] Matrix preparation: Add 0.1kg of accelerator TETD and 1kg of zinc stearate to 45kg of olefin block copolymer, stir and mix and place it at 200°C for 17.5 minutes of mastication treatment, and collect the mastication matrix glue;

[0055] Compatibility modification: Stir and mix 5 kg of molten poly-4-methylpentene-1 particles and 35 kg of plasticizing base rubber and place it in a torque rheometer at 105°C, stir and mix, heat-preserve and vulcanize, collect the vulcanized rubber and open Refining treatment, standing still and then crushing through a 200-mesh sieve to prepare modified rubber elastomer 2.

preparation example 3

[0057] Matrix preparation: Add 0.1kg of accelerator TETD and 1kg of zinc stearate to 50kg of olefin block copolymer, stir and mix and masticate at 200°C for 20 minutes to collect the plasticized matrix glue;

[0058] Compatibility modification: Stir and mix 5kg of melted poly-4-methylpentene-1 particles and 40kg of plasticized base rubber and place it in a torque rheometer at 110°C, stir and mix, heat-preserve and vulcanize, collect the vulcanized rubber and open Refining treatment, standing and parking, and crushing through a 200-mesh sieve to prepare modified rubber elastomer 3.

[0059] performance test

[0060] The modified rubber elastomers prepared in Preparation Examples 1 to 3 and the olefin block copolymers with equal mass were used as blank groups, and thermal performance tests were carried out.

[0061] Detection method / test method

[0062] Thermal properties: Characterized by a thermogravimetric analyzer (heating rate 20 K / min, nitrogen atmosphere), the specific ...

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Abstract

The invention relates to the field of gasket materials, and particularly discloses a TPE gasket material capable of resisting content migration and preparation and processing methods of the TPE gasket material. The TPE gasket material capable of resisting content migration is prepared from the following substances in parts by weight: 5-40 parts of a styrene chain segment-containing block copolymer, 0-10 parts of white oil and 20-100 parts of a modified rubber elastomer, wherein the modified rubber elastomer is a rubber elastomer modified by blending poly (4-methylpentene-1) resin. The preparation method of the TPE gasket material capable of resisting content migration comprises the following steps of: S1, preparing an oil-filled matrix material; S2, preparing a modified oil-filled matrix material; S3, mixing materials; and S4, extruding and blending. The processing method comprises the steps of injection molding, extrusion, molding, drip molding and other thermoplastic molding. Through polyolefin elastomer modification, the system structure is compacted, and the migration phenomenon of the TPE gasket material in a high-temperature environment and under a content infiltration condition is improved.

Description

technical field [0001] This application relates to the field of gasket materials, more specifically, it relates to a TPE gasket material resistant to content migration and its preparation and processing methods. Background technique [0002] Polyvinyl chloride (PVC) material was once widely used as a gasket material for food packaging due to its low price, good elasticity and sealing performance, but due to the addition of plasticizers and dioxins in PVC gaskets British and other substances, in the actual use process, these harmful substances will migrate and volatilize in high temperature environment and pollute the environment, so in order to improve this situation, thermoplastic elastomer TPE materials are gradually being widely used. [0003] TPE thermoplastic elastic material is a widely used material. Because of its good high temperature resistance, in the field of food packaging, it can meet the needs of steam sterilization of the material in high temperature environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L53/02C08L91/00C08L23/20C08L23/10C08L23/00C08L23/16C08L23/12C08L67/02C08K5/098C08K5/526C08J5/18
CPCC08J5/18C08J2353/00C08J2323/10C08J2323/00C08J2323/16C08J2453/02C08J2491/00C08J2423/20C08K5/098C08K5/526C08J2423/12C08J2467/02
Inventor 邬慧荣王金华贾付华张春才张文博胡朔
Owner JIANGSU TOP POLYMER ENTERPRISE