In actual production, natural rubber was used alone for the outer rubber of ordinary red rubber hoses; later, natural rubber and styrene butadiene rubber were used together to improve the wear resistance, heat resistance and aging resistance of the outer rubber of the hose; Later, in order to reduce the cost of raw materials, reclaimed latex rubber appeared in the outer rubber formula of the red hose. When reclaimed latex rubber, which is a renewable resource, is used in the production of rubber hoses, rubber product manufacturers need to reasonably control the amount of reclaimed rubber and adjust the rubber product formula appropriately.
1. Formula for outer layer of red rubber tube containing latex reclaimed rubber
10 parts of natural rubber, 20 parts of styrene-butadiene rubber, 10 parts of pure latex reclaimed rubber, 1.5 parts of zinc oxide, 0.3 parts of stearic acid, 45 parts of calcium carbonate, 0.7 parts of paraffin wax, 0.8 parts of microcrystalline wax, 0.5 parts of antioxidant, promotion 0.5 part of agent, 1 part of sulfur, appropriate amount of iron oxide red.
2. Tips for selecting reclaimed latex rubber for the outer rubber of the red hose
When using latex reclaimed rubber to reduce the raw material cost of the outer rubber of the red rubber hose, choose a reclaimed rubber product that is close to the mechanical strength of the outer rubber of the hose. In order to reduce the difficulty of color matching, white/red latex reclaimed rubber can be selected. The color matching is simple and the amount of colorant 2LLYY128 is small. In order to ensure that the outer rubber of the red hose does not change color and migrate during storage and use, the reclaimed latex rubber cannot contain volatile substances or easily extracted rubber oil. Choose high-fineness, impurity-free latex reclaimed rubber to ensure a smooth and bright surface of the hose.
3. Application of iron oxide red in the outer glue of red hose
When using white latex reclaimed rubber to prepare low-cost, high-quality red rubber hose outer layer rubber, iron oxide red is the most commonly used coloring agent, which has multiple functions of coloring, softening, moisture absorption, and demoulding aid in the formulation. The general dosage is controlled between 8-10 parts, and the specific dosage is determined according to the actual color requirements of the red hose and the color and performance of the natural latex reclaimed rubber used. When black pure latex reclaimed rubber is used for the outer rubber of the red hose, the amount of iron oxide red needs to be increased; when the red latex reclaimed rubber replaces part of the natural rubber, the amount of iron oxide red in the outer rubber formula of the red hose can be appropriately reduced.
When using latex reclaimed rubber and natural rubber/styrene-butadiene rubber to prepare the outer rubber of ordinary red rubber hoses, rubber products manufacturers not only need to select suitable indicators of latex reclaimed rubber, adjust the rubber hose formula, but also need to pay attention to the rubber material. The effect of mixing, vulcanization and other processes on the color of the product, strictly control each production process parameter such as mixing temperature, mixing time, vulcanization temperature, vulcanization time, etc. The editor will have the opportunity to discuss the outer rubber of the red hose with you Production techniques of blended latex reclaimed rubber.
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