Sponge rubber-soled slippers are characterized by being lightweight, soft, and providing good cushioning, and are generally made primarily from natural rubber. Latex reclaimed rubber is made from waste natural rubber and waste latex products, possessing the basic properties of natural rubber: high strength, good elasticity, and low specific gravity. It can be used alone or combined with natural rubber to produce slipper sponge soles, effectively reducing raw material costs while ensuring the product's performance.
1. Tips for choosing latex reclaimed rubber for slipper sponge soles
When choosing latex reclaimed rubber for slipper sponge soles, you need to choose based on the sponge sole's color and processing performance requirements.
(1) Latex reclaimed rubber color: For white, light-colored, or colored slipper sponge soles, it is recommended to choose white natural latex reclaimed rubber, which is lighter in color, easy to match, and resistant to migration and discoloration; The colored sponge base uses white reclaimed rubber, which effectively prevents the color from becoming cloudy or migrating due to colored reclaimed rubber.
(2) Latex reclaimed rubber specifications: The rubber sole for slippers has strict requirements for elasticity, fineness, volatility, and environmental protection of the rubber compound. It is recommended to choose high-fine, impurity-free, low-volatility, environmentally friendly ultrafine filtered latex reclaimed rubber E6LYY127 to avoid impurities disrupting the continuity of the sponge structure, causing foaming failure, or surface roughness; The higher the effective rubber hydrocarbon content, the better the elasticity and strength of latex reclaimed rubber; Excessive volatile content of reclaimed rubber can generate excessive gases during foaming, causing problems such as sponge sole collapse, uneven holes, or unstable size in the slippers; The sponge soles of indoor slippers must use environmentally certified natural recycled rubber.
2. The ratio of latex reclaimed rubber to the sponge soles of slippers
When using latex reclaimed rubber to reduce the production cost of slipper sponge soles, it is necessary to strictly control the proportion of latex reclaimed rubber added. Generally, latex reclaimed rubber is blended with natural rubber (NR) and styrene-butadiene rubber (SBR) at a ratio of 30%-60%. This not only reduces the cost pressure caused by pure raw rubber, but also promotes uniform bubble distribution during foaming through the microporous structure of the reclaimed rubber, thereby reducing the shrinkage rate of the sponge sole.
3. The green slippers use latex reclaimed rubber for the sponge soles
Natural rubber 50 parts, white latex reclaimed rubber 50 parts, zinc oxide 5 parts, stearic acid 3.5 parts, anti-aging agent D 1 part, paraffin 6 parts, kaolin 20 parts, magnesium carbonate 25 parts, Lide powder 10 parts, petroleum jelly 3 parts, paraffin oil 1.5 parts, rosin 5 parts, phenolic resin 25 parts, sun-resistant emerald green 3 parts, alcohol-soluble yellow 0.7 parts, foaming agent H 5.5 parts, accelerator DM 1.2 parts, accelerator M 1.2 parts, sulfur 2.7 parts; A total of 219.3 copies.
When using latex reclaimed rubber to produce slipper sponge soles, it is essential to strictly control the impurity content: ash ≤8%, volatile matter ≤1.2%, to avoid pinholes and delamination in the sponge sole. The formula for latex reclaimed rubber slipper sponge soles uses appropriate amounts of white carbon black and calcium carbonate, which can balance the strength and elasticity of the compound, producing soft, comfortable, dimensionally stable, and high-quality, low-cost, high-performance sponge slipper soles.
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