When using latex reclaimed rubber to prepare sponge foamed rubber products, the latex reclaimed rubber index, vulcanization system, foaming system, reinforcing filling system, anti-aging system, and softening system will all affect the performance and service life of the foamed product. Among them, stearic acid, paraffin, calcium carbonate, anti-scorching agent and other small materials play multiple roles in latex high-elastic sponge foam products, and may also cause some minor problems. Sponge foam product manufacturers should Fair use.
1. The role of stearic acid and paraffin wax
Stearic acid is mostly used in conjunction with zinc oxide in the production of latex reclaimed rubber products, which has multiple functions such as lubrication, foaming, scorching prevention, and activation of the vulcanization system; paraffin wax is a commonly used physical anti-skid agent. In the formulation of the latex reclaimed rubber high-elastic sponge foam product formula, stearic acid and paraffin can prevent the sponge product from sticking to the sponge pore wall when the sponge product is compressed, improve the processing technology of the sponge product, prevent sticky rollers and smooth demoulding.
2. Use calcium carbonate with caution
Calcium carbonate is a commonly used rubber filler in the production process of latex reclaimed rubber products. While reducing the finished product, it can improve the tensile strength, abrasion resistance, and tear strength of foam foam products. Excessive use will affect the mechanical strength and elasticity.
For colored latex high-elastic sponge foam products, the application of calcium carbonate will cause the migration of certain colorants; the large amount of calcium carbonate 2LLYY821 in black latex sponge foam products will cause the surface of the product to be black and the brightness is not enough There was a problem. Therefore, calcium carbonate must be used cautiously in the formulation of high-elastic latex sponge foam products, and the amount of calcium carbonate must be controlled reasonably.
3. Pay attention to the influence of small materials on the color of colored sponge products
When using latex reclaimed rubber to produce colored high-elastic sponge foam products, such as travel shoe soles, sponge outsoles, etc., you must pay attention to the selection and collocation of colorants. If necessary, you can use several colorants together, and keep the ratio stable to ensure different The color of the batch of products is consistent. It should be noted that, in order to obtain the desired color of colored latex foam products, do not use polluting antioxidants and other compounding agents that are prone to migration.
4. Multiple effects of anti-scorching agent
Reasonable use of anti-scorch agents in the formulation of latex reclaimed rubber products can effectively avoid early vulcanization of the rubber. In actual production, sponge rubber has good plasticity and is not prone to scorch. However, many latex high-elastic foam foam product formulations still use anti-scorching agents. Its main purpose is naturally not to prevent scorching, but through the use of anti-scorching agents. Adjust the decomposition speed and vulcanization speed of the blowing agent, the amount is generally controlled between 0.1-0.5 parts by mass, and can be increased to 1 part by mass if necessary.
When using latex reclaimed rubber to produce high-elastic foam products, the effect of many small materials is different from usual. Rubber product manufacturers must use them rationally to further optimize product quality while reducing the production cost of high-elastic foam products. In actual production, due to the narrow range of preparation process conditions for latex sponge foamed rubber, various parameters must be strictly controlled in the process of plasticizing, mixing, refining, and vulcanizing. I have the opportunity to continue discussing with you.
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