The effect of polyvinyl wax on the adhesive strength of rubber, polyvinyl wax can enhance the dispersion of fillers in rubber processing, improve the speed of extrusion molding, increase the flow rate of the mold, facilitate demoulding, and improve the surface gloss of the product .
In addition to the use of related machinery in the rubber processing process, certain rubber processing aids need to be added. The existing rubber processing aids include polyvinyl wax, montan wax, etc. Montan wax is a natural wax that has excellent performance in rubber processing, but the supply is seriously in short supply. Polyethylene wax is a synthetic wax, and its supply is relatively stable.
Rubber processing (release) Polyethylene wax has different functions in different rubber processing processes Calendering: it can be used to make pure film, patterned film and cord, canvas, copper-plated steel cord, etc. Glue covering (gluing, wiping) of bracket materials.
The main function of polyvinyl wax:
1. Lubrication and dispersion Generally, some filling will be added to the mixing of rubber or silica gel, some will add carbon black, calcium carbonate, talcum powder, etc., and some white carbon and black will be added to those that require high transparency. Adding polyvinyl wax can play a certain role in lubricating and dispersing.
2. Anti-sticking and demoulding General rubber is sticky and easy to stick to the mold! Polyethylene wax can play a certain role in external lubrication.
Whether the surface of the material to be bonded is clean and active is the key to whether the adhesion is firm or not. During the process of processing, transportation and storage, the adhered materials will inevitably rust, oxidize, stick to oil, absorb dust and other sundries, these substances directly affect the adhesion, so the bonding process should be According to the nature of the bonding material, the surface should be cleaned first. Commonly used methods include solvent cleaning, emery cloth grinding, sandblasting and chemical treatment, etc. After proper surface treatment, the strength of the bonded joint can be significantly improved. , durability and fatigue life, in the production of tires, tapes, hoses, shock-absorbing products and rubber rollers, non-rubber frame materials need to be strictly treated to improve the bonding strength and ensure the quality of rubber products.
Leave a message
We’ll get back to you soon