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Rubber compound for sealing gasket, sealing gasket and preparation method thereof, and plate heat exchanger including the sealing gasket

A sealing gasket and rubber technology, which is applied in the field of sealing rubber, can solve the problems of easy tearing, uneven thickness of sealing gasket, poor fluidity, etc.

Active Publication Date: 2022-01-28
青岛科瑞博科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a rubber compound for sealing gaskets, so as to alleviate the thickness of the sealing gaskets caused by the poor fluidity of the existing rubber materials for sealing gaskets during the molding and vulcanization process of the sealing gaskets in the later stage. Problems of unevenness and easy tearing after demoulding

Method used

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  • Rubber compound for sealing gasket, sealing gasket and preparation method thereof, and plate heat exchanger including the sealing gasket
  • Rubber compound for sealing gasket, sealing gasket and preparation method thereof, and plate heat exchanger including the sealing gasket
  • Rubber compound for sealing gasket, sealing gasket and preparation method thereof, and plate heat exchanger including the sealing gasket

Examples

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Effect test

preparation example Construction

[0084] According to one aspect of the present invention, a kind of preparation method of above-mentioned sealing gasket, described preparation method comprises the following steps:

[0085] Mixing EPDM rubber, dendritic polymer, vulcanizing agent and optional auxiliary agent to obtain a mixed rubber, and then vulcanizing the mixed rubber to obtain a sealing gasket.

[0086] The preparation method of the sealing gasket provided by the invention, the preparation method first mixes EPDM rubber, dendritic polymer, vulcanizing agent and optional auxiliary agent to obtain the mixed rubber, and then vulcanizes the mixed rubber , to get the sealing gasket. The preparation method has the advantages of simple preparation process, easy control of processing flow, and favorable industrialized large-scale production.

[0087] In a preferred embodiment of the present invention, the kneading method is as follows: the EPDM rubber is first masticated and then mixed with dendritic polymer, vul...

Embodiment 1

[0107] A sealing gasket, the sealing gasket is prepared from a rubber compound for the sealing gasket, and the rubber compound for the sealing gasket is made from the following raw materials:

[0108] 80 parts of EPDM rubber, 55 parts of PUREX brand HS22 carbon black, 35 parts of natural gas semi-reinforced carbon black, 2 parts of zinc oxide, 4 parts of vulcanizing agent DHBP-45, 0.5 parts of crosslinking agent TM-60, antioxidant 0.2 part of DFC-34, 6 parts of antioxidant MMB and 1 part of dendritic polymer;

[0109] The preparation method of the sealing gasket is as follows:

[0110] (1) Open mill plastication: Weigh the EPDM rubber by the number of parts, adjust the roll distance of the open mill to 1mm, and thinly pass the EPDM material on the open mill for 5 times to make triangular bags;

[0111] (2) Kneading by kneader: park the masticated EPDM material for 12 hours, add it to the kneader, and add the rest of the raw materials according to the corresponding components,...

Embodiment 2

[0117] A sealing gasket, the sealing gasket is prepared from a rubber compound for the sealing gasket, and the rubber compound for the sealing gasket is made from the following raw materials:

[0118] 120 parts of EPDM rubber, 75 parts of PUREX brand HS22 carbon black, 35 parts of natural gas semi-reinforced carbon black, 8 parts of zinc oxide, 9 parts of vulcanizing agent DHBP-45, 5 parts of crosslinking aid TM-60, antioxidant 5 parts of DFC-34, 0.4 part of antioxidant MMB and 6 parts of dendrimer;

[0119] The preparation method of the sealing gasket is the same as in Example 1.

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Abstract

The invention provides a rubber material for a sealing gasket, a sealing gasket and a preparation method thereof, and a plate heat exchanger comprising the sealing gasket, and relates to the technical field of sealing rubber. The sizing material for the above-mentioned sealing gasket includes EPDM rubber, dendritic polymer and vulcanizing agent, wherein, EPDM rubber has the characteristics of heat resistance, corrosion resistance and ozone resistance as the main material; dendritic polymer can increase The dispersibility and fluidity of each raw material in the rubber compound make the dispersion of each raw material more uniform; the vulcanizing agent is used to produce cross-linking during later vulcanization. The raw materials of the rubber compound for sealing gaskets obtained by synergizing the above-mentioned raw materials are evenly dispersed and have good fluidity. The prepared sealing gaskets have uniform thickness, high elasticity, high strength, and are easy to demould. The poor fluidity of the rubber material during molding and vulcanization results in uneven thickness of the sealing gasket and easy tearing after demoulding, which effectively guarantees the sealing effect and quality stability of the sealing gasket.

Description

technical field [0001] The invention relates to the technical field of sealing rubber, in particular to a rubber material for a sealing gasket, a sealing gasket and a preparation method thereof, and a plate heat exchanger comprising the sealing gasket. Background technique [0002] The plate heat exchanger is an important device for exhaust energy recovery of large air-conditioning systems, high-temperature flue gas waste heat recovery and computer CPU heat dissipation. As an important part of the plate heat exchanger, the sealing gasket is very important for the service life of the plate heat exchanger. influences. Due to the complex structure of the sealing gasket in the plate heat exchanger, especially the EPDM material, which is one of the main categories of sealing gaskets for plate heat exchangers, has poor fluidity during molding and vulcanization, so the molded vulcanization The thickness of the sealing gasket is uneven, which affects the sealing effect in the plate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L87/00C08K3/04C08K3/22C08K13/02C09K3/10B29C43/00B29C43/02
CPCC08L23/16C09K3/10B29C43/003B29C43/02C08K2003/2296C08L2201/08C09K2003/1078C08L87/00C08K3/04C08K3/22C08K13/02
Inventor 他维成刘忠元
Owner 青岛科瑞博科技实业有限公司
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