When making rubber sole PVC, it is necessary to add carbon black, but many friends do not know whether to add white carbon black or black carbon black. In fact, it is possible to add white carbon black or black carbon black to PVC rubber soles. It depends on the production of the sole. What is the color of PVC? Carbon black is easy to produce black marks when used in soles. The reinforcing properties of other light-colored or white fillers cannot meet the high performance requirements of sole rubber. Therefore, white carbon black and styrene-butadiene rubber (SBR) , butadiene rubber (BR) etc. can be used together to meet its high performance requirements.
What is carbon black used for sole filling?
Filling carbon black in rubber sole PVC can increase the hardness value of the sole, which can achieve the purpose of wear resistance, but the sole should not be filled with too much carbon black. If you add too much, the hardness will increase and the toughness will decrease. It will be easy to break. It can be seen that adding carbon black to PVC soles still has many effects.
Is it okay to add white carbon black to PVC on the sole?
As the main reinforcing filler, silica is widely used in the production of sole rubber, especially in transparent and translucent sole rubber. Silica can replace carbon black 100% in the outsole formula of shoes, so the shoe industry has always been the largest user of silica in the rubber industry. In addition, white carbon black and elastomer materials are used in sole rubber to fill and improve the physical properties and processing performance of the rubber material. It can also improve the wear resistance, hardness, tensile strength and tear strength of the sole. It is widely used in light-colored, colored translucent and transparent soles (including outsoles, midsoles and surrounds).
What is the ratio of carbon black to PVC for shoe soles?
When making rubber shoes, the amount of carbon black for black soles is 50 parts, 50 parts of superfine activated calcium carbonate (Bai Yanhua), 40 parts of clay, 55 parts of white carbon black for white soles, 15 parts of superfine calcium carbonate, and 2 parts of titanium dioxide. When producing color masterbatch, the composition ratio is: polyvinyl chloride 57%, carbon black 40, additive 3%.