company news about Application of PE polyethylene wax in rubber

The application of PE (polyethylene) wax in rubber improves the surface brightness and smoothness of the product after film removal. To protect rubber from the erosion of static ozone and improve the dispersibility of carbon black in rubber, it is recommended to add 2-5phr; The use of PE wax in rubber is a chemical material, in which the color of polywax is small white beads/flakes, formed by polyrubber processing agents. It has the characteristics of high melting point, high hardness, high glossiness, and snow-white color.
The use of PE wax in rubber is widely used as a low molecular weight homopolymer or copolymer in coatings. The so-called wax refers to the wax like substance that the polymer ultimately floats in the form of microcrystals on the surface of the coating, resembling paraffin in appearance but with more different properties than paraffin.
The main functions of PE wax in rubber in solvent based coatings are: extinction, scratch resistance, wear resistance, polishing resistance, engraving resistance, anti adhesion, anti precipitation, and thixotropy. Good lubrication and processability, metallic pigment properties.
1. Lubrication dispersion: Generally, when mixing rubber or silicone, some fillers are added, such as carbon black, calcium carbonate, talc powder, etc. For those with high transparency requirements, white carbon black and other fillers are added. Adding polyethylene wax can have a certain lubricating and dispersing effect.
2. Anti stick demolding: Generally, rubber is relatively sticky and easy to stick to the mold! Polyethylene wax can provide a certain external lubrication effect.
3. Anti ozone, a physical anti-aging agent for rubber products, migrates to rubber products to form a protective film that plays an anti ozone role.
4. Proper addition can reduce the Mooney viscosity of the mixed rubber and have a plasticizing effect, but excessive addition can affect the mechanical properties of the rubber material.
5. The flowability of certain products during extrusion, rolling, and vulcanization molding.
6. Improving the uniformity of mixed rubber: The self-lubricating of the inner and outer rubber materials and the dispersion of inorganic additives play a certain role in improving the mixing uniformity of mixed rubber.
However, most manufacturers do not choose polyethylene wax for the following reasons:
1. The melting point is relatively high. Some rubbers are mixed at temperatures between 70-120 ℃, while polyethylene wax has a high melting point and is not easy to melt, making it ineffective. (The softening point of polyethylene wax is generally selected to be around 70-100 ℃).
2. Rubber is a polymer material that is prone to precipitation, while polyethylene wax has smaller molecules. Adding more makes it easier to precipitate, while adding less generally does not achieve the desired effect. (2-4phr is appropriate).
3. The narrow range of use is mainly limited by the melting point.
4. Affects the transparency of the product.