products believes everyone not unfamiliar, common production processes are hot pressing molding, injection molding, extrusion molding, produced after some rubber products also need to undertake secondary plus sulfur are called secondary sulfide.
Actually forming after we seems to have been a good product from the naked eye, why the secondary sulfide can be normal use?
products manufacturer to take you to get to know why below secondary sulfide?
First of all, to be sure, not all of the rubber products require secondary sulfide, just according to different raw materials formula, some of them are a molding can directly, but some special materials such as fluorine rubber products, some of the EPDM rubber products need to be the cause of the secondary sulfide is the following: the first of these materials in a sulfide, the inside of the peroxide decompose polymer reaction, to produce some low molecular compounds (
Such as benzene, benzoic acid, etc. )
, these low molecular compounds can reduce the mechanical properties of rubber in rubber life is reduced, so the common secondary vulcanization rubber products manufacturer will evaporate low molecular compound.
Second, in a sulfide is finished, the rubber molecules may not fully crosslinking (
, secondary sulfide can make its sulfide more fully and more evenly, so as to improve the mechanical properties of rubber and durable.
Third, carries on the secondary sulfide, such as a large number of use on the car of the EPD can freshen up after the second vulcanized rubber products, improve the vehicle occupant comfort.
Fourth, rubber seals
products manufacturers to reduce costs, increase production capacity, often shorten curing time, and then in the second vulcanization ShiYanChang time, ensure products fully sulfide at the same time, also improve their competitiveness.
seal products manufacturers to select different materials can meet the different high and low temperature resistance, high and low pressure resistance, abrasion resistance, acid and alkali and other chemical medium, corrosion resistance, aging, knight of the oil pressure and fatigue condition of the environment, can according to customer demand design suitable products.
Special seal, mechanical spare parts in imported equipment has unique experience, design, manufacture and assembly of surveying and mapping shall be also can attend.
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