Rosin belongs to plant softener in rubber softener. It is an unsaturated compound obtained after turpentine is distilled off turpentine. It is a yellow-brown solid. It can increase the rubber elasticity in the rubber product industry, improve the adhesiveness of the rubber material, and promote the rubber compounding agent Dispersion in compound. The use of recycled rubber production of rubber products, choose the right amount of quality rosin addition, the same can improve the performance of recycled rubber products.
The choice of rosin for reclaimed rubber should be based on the rosin color, acid value, softening point, transparency, etc. to determine the quality of rosin, to grasp the following skills can be easily selected:
1, observe rosin color, the more general color, the better quality;
2, the more rosin acid content, the greater the acid value, the higher the softening point; it is softening temperature is low compared with the various resin acids that make up the rosin, because rosin contains certain high boiling point sesquiterpene and other Sexual substances, the lower the softening point, the worse the quality.
3, the rosin dissolved in alcohol to determine the content of mechanical impurities, including alcohol-insoluble part of the mechanical impurities, the more impurities, the worse the quality.
4, the better the transparency of rosin, the better the quality, containing less impurities.
5, the detection of unsaponifiable rosin (not with alkaline substances play a role in the material), unsaponifiables will make the reclaimed rubber products stick phenomenon.
Rosin in the reclaimed rubber formulations can soften plastic compounds to improve the plasticity of reclaimed rubber compounds and promote the uniform distribution of the compound in the rubber compound to improve the reclaimed rubber processing technology; rosin with its unique molecular structure and performance can also be Improve the elasticity of recycled rubber products, tear strength, heat resistance, abrasion resistance and surface gloss.
Rosin has its own advantages, the choice of high-quality rosin products, recycled rubber and products for the production and processing is of great significance, rubber products companies must be polite eyes, be careful choice; but in the actual production, the election does not mean rosin With the rosin can be used to achieve the desired effect. Different types of reclaimed rubber used in different rosin, reclaimed rubber products recipes vary in the amount of rosin is also different:
The addition of 2% -6% of rosin to reclaimed rubber tire formulations increases tire tear strength, elasticity and traction on ice and snow to improve tire performance; however, excessive use of rosin accelerates rubber Tire aging, which is because the rosin molecule contains unsaturated double bonds, the physical or chemical effects may produce free radicals, the free radicals can be induced rubber chain scission, rubber products to promote aging. Rosin can be seen in the amount of recycled rubber products is a certain range, 3-5 copies can be.
Select high-quality rosin, determine the appropriate amount of rosin to play a role in the production of recycled rubber products to the maximum extent.
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