In the refining process of using the opener, the rubber may be scorched for some reason, in order to prevent the rubber from scorching, Linnaeus technical engineers to introduce the methods to prevent scorching, the details are as follows:
First of all, to reduce the amount of vulcanization accelerator with the amount of rubber products, but this will lead to the physical properties of the rubber products, understand this is very important, vulcanization accelerator alone is rarely used, once the match with the problem, it can not prevent the rubber material scorching.

Openers in general, the general rubber with the main accelerator for the secondary sulfophthalimide accelerator, the main accelerator DM is a universal accelerator, accelerator M, high scorch, secondary sulfophthalimide accelerator although scorch-resistant, but due to the slow start of the vulcanization, so it is necessary to choose according to the requirements of the use of rubber material, the autumn Rum class department of auxiliary accelerators. In the summer high temperature season, auxiliary accelerator to reduce the amount of use, while the main accelerator will try not to reduce the amount of cooperation.

Will be 10-20 quality parts of recycled rubber to join the general rubber, made of rubber after blending, with the role of preventing scorching, the blended rubber, to consider the design of additive formulations, in the study of scorching and vulcanization of rubber on the basis of the physical properties of some of the necessary modifications!

With silica compounds, to add diethylene glycol, polyethylene glycol, organic amine accelerator SL, etc., but adding too much of the above compounds will also lead to burning, so it must be paid attention to.

The standard mixing amount is 60% of diethylene glycol and polyethylene glycol (molecular weight of 400) and 2.5% of organic amine promoter SL (compared with silica). Although many discussions have been made with regard to the combination as described above, if scorching cannot be prevented, an anti-scorching agent (sulfurization delaying agent) can be added. The vulcanization delay agent is an organic acid such as anhydrous phthalic acid and benzoic acid, nitroso compounds and organic synthetic compounds such as o-phthalimide. Because nitrosodiphenylamine is polluting, it cannot be used for light-colored rubber products.

Anti-coking agent in delaying vulcanization at the same time, also slows down the speed of vulcanization, openers because it will reduce the degree of cross-linking, so do not use a large number of, according to the Liner engineers for many years of experience, the dosage should not be more than 0.4%. If the dosage must be more than 0.4%, the dosage of vulcanization accelerator should be reduced first. It is not advisable to use high accelerator, high anti-coking agent with the method.

For each batch of mixed rubber, on the basis of the original data, set the range of coking time, and continuously adjust the solution within this range. For example, set the burning time for Menni, 125 ℃ , MS, 15 a 25m in. For the blended rubber can be water-cooled, air-cooled or both ways to make the film cooled to room temperature. Even in the case of calendered rolled stock, if there is a risk of scorching, the opener can air-cool it as it is rolled, or cut it to length and air-cool it. According to the need can also be used in air-conditioned rooms, cold storage for storage.

For most of the rubber material to be returned to the refining, first of all, the rubber material to be returned to the refining into the hot refining machine on the hot refining, after confirming that the rubber material does not burn, and then add a new mixing rubber for mixing, if the operation procedure is the opposite, it will lead to all the rubber material burnt.