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Sizing material for sealing gasket, sealing gasket, preparation method of sealing gasket and plate heat exchanger comprising sealing gasket

A technology for sealing gaskets and rubber materials, applied in the field of sealing rubber, can solve the problems of poor fluidity, uneven thickness of sealing gaskets, easy tearing when demoulding, etc., and achieves good fluidity, which is conducive to industrialized large-scale production and easy to remove. mod effect

Active Publication Date: 2019-11-22
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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  • Sizing material for sealing gasket, sealing gasket, preparation method of sealing gasket and plate heat exchanger comprising sealing gasket
  • Sizing material for sealing gasket, sealing gasket, preparation method of sealing gasket and plate heat exchanger comprising sealing gasket
  • Sizing material for sealing gasket, sealing gasket, preparation method of sealing gasket and plate heat exchanger comprising sealing gasket

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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 sizing material for a sealing gasket, the sealing gasket, a preparation method of the sealing gasket and a plate heat exchanger comprising the sealing gasket, and relates to the technical field of sealing rubber. The sizing material for the sealing gasket comprises ethylene propylene diene monomer, dendritic polymer and a vulcanizing agent, and the ethylene propylene dienemonomer serving as a main material has the characteristics of heat resistance, corrosion resistance and ozone resistance; the dendritic polymer can increase the dispersity and fluidity of all the rawmaterials in the sizing material, so that all the raw materials are dispersed more uniformly; the vulcanizing agent is used for generating a cross-linking effect during later vulcanization. Accordingto the sizing material obtained through the mutual cooperation of the raw materials, the raw materials are uniformly dispersed and the sizing material is high in mobility; the prepared sealing gasketis uniform in thickness, high in elasticity, high in strength and easy to demould, the problems that the sealing gasket is uneven in thickness and easy to tear during demoulding due to the fact thatan existing sizing material for the sealing gasket is poor in flowability during mould pressing vulcanization are solved, and the sealing effect and the quality stability of the sealing gasket are effectively guaranteed.

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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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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