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Butyl rubber, abbreviated as IIR, is an abbreviation for isobutylene isoprene rubber.It has good chemical and thermal stability, as well as good air and water tightness.Its air permeability is only 1/7 of natural rubber and 1/5 of styrene-butadiene rubber, while its vapor permeability is 1/200 of natural rubber and 1/140 of styrene-butadiene rubber.
High pressure butyl tape is difficult to penetrate this gas and is a piece of cake when used as a waterproof seal. Its good weather resistance, with relevant test data, the high temperature resistance of butyl rubber can reach above 120 ℃, and the low temperature resistance is -40 ℃.
Huanggang Juaoming New Material Co., Ltd.
So, how can such a good material distinguish between true and false?
In response to this problem, Huanggang Juaoming New Materials Co., Ltd. summarized the following distinction methods:
.First of all, distinguished by odor, good butyl rubber is basically odorless, and those with a slight emulsification or bitumen smell are often used to reduce costs by adding bitumen.
.From the color of rubber, good butyl rubber is white and yellowish. At present, in order to save costs, many manufacturers in our country mostly use asphalt to reduce costs, so the color will become gray or black. Of course, while reducing the cost, it also reduces its high and low temperature tolerance.
.In order to distinguish it from the initial viscosity, the so-called initial viscosity refers to the viscosity felt after the initial contact with the high pressure butyl tape.
The initial viscosity of true butyl rubber is not very high. The material seems to have a good viscosity, and others can see at a glance that it is actually an emulsion that improves viscosity while adding asphalt. However, in hot weather, especially in hot summer, the high temperature on the metal surface may reach above 80°C, and the phenomenon of drooling tends to occur. Its durability speaks for itself.
