Formula of rubber for valve seat, preparation method for rubber, and valve seat

A formula and rubber technology, applied in the direction of valve devices, mechanical equipment, engine components, etc., can solve problems such as product failure, achieve the effect of improving antibacterial effect, improving food safety, and increasing content

Inactive Publication Date: 2011-11-23
天津市滨海新区塘沽于庄橡胶厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] As for the existing ordinary ethylene propylene rubber, the British WRAS company has given a comprehensive test conclusion: the valve seat rubber seal ring significantly increases the growth rate of microorganisms in the water after 7-8 weeks when the rubber valve seat seal ring touches water, and the MDOD value is greater than 2.9mgl - 1. The product is unqualified

Method used

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  • Formula of rubber for valve seat, preparation method for rubber, and valve seat
  • Formula of rubber for valve seat, preparation method for rubber, and valve seat

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Embodiment Construction

[0020] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] The following table is specific examples and main performance indicators, wherein the content in the examples is weight percent.

[0022] material name

[0023] In the five tests of the BS6920 standard, the samples prepared in the above four examples were far less than the standard requirements, especially the antibacterial effect was improved by about 70% compared with the formula in 2006, which improved the scope of product use and broadened the company's commodity items. Only tap water valve seat products have brought huge benefits to the company, while maintaining the basic conditions of human existence and improving food safety.

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Abstract

The invention discloses a formula of rubber for a valve seat. The rubber comprises the following components in percentage by weight: 56 to 62 percent of ethylene-propylene-diene mischpolymere rubber, 23 to 26 percent of carbon black, 6 to 10 percent of metallic compound, 0.5 to 3 percent of anti-aging agent and 3.5 to 5 percent of peroxide. The invention also discloses a preparation method for the rubber in the formula and a valve seat product. A main raw material is the ethylene-propylene-diene mischpolymere rubber which is terpolymer of ethylene, propylene and non-conjugated dialkene, has the main characteristics of excellent antioxidation, ozone resistance and corrosion resistance and good vulcanization characteristic, and can absorb massive fillers and oil but the characteristics are influenced hardly. The antibacterial, micro-poisonous and low-dissolution metal rubber can be applied to life industries abroad and at home to improve food safety.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a rubber formula. Background technique [0002] In urban drinking water projects, butterfly valve control is required. Butterfly valves generally include butterfly valve structure and rubber valve seat. In the drinking water engineering standards of the three countries of the European Union (UK, France and Germany), the rubber sealing ring of the valve seat must meet the requirements of BS6920 before it is allowed to enter the tap water regulations. BS6920 includes five different tests as shown in Table 1: [0003] Table 1 [0004] serial number Test items control time 1 the smell of water 14 working days 2 appearance of water 14 working days 3 microbial growth 7 weeks 4 cytotoxic activity 7 working days 5 extract metal 4 weeks [0005] in: [0006] 1. Ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/04C08K5/14C08K3/22B29C35/02F16K51/00
Inventor 刘玉山
Owner 天津市滨海新区塘沽于庄橡胶厂
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