Latex Rubber Encyclopedia

Effect of various components on the properties of latex reclaimed rubber

Create Date:2019-11-08 09:14:39Click volume:52
Effect of various components on the properties of latex reclaimed rubber

Latex reclaimed rubber is a product processed from waste natural rubber and waste latex products. Its main function is to replace natural rubber to reduce the cost of natural rubber rubber products. Its main components are similar to natural rubber, including rubber hydrocarbons, proteins, acetone extracts, Ash, moisture, etc., different components have different effects on the performance of latex reclaimed rubber. Rubber products manufacturers need to select suitable indicators of latex reclaimed rubber products according to actual needs to ensure quality and reduce costs.

1. Effective rubber hydrocarbons in latex reclaimed rubber

The main component of natural rubber is rubber hydrocarbon. The general rubber hydrocarbon component accounts for 91%-94%. The higher the content, the better the physical and mechanical properties of natural rubber. In the process of recycling and reprocessing of natural rubber waste rubber cups, rubber yarns, waste rubber materials or waste latex products, rubber hydrocarbons will be retained. Generally, high-quality latex reclaimed rubber can effectively use more than 75% of rubber hydrocarbons. The performance is closer to natural rubber, which can replace a larger proportion of natural rubber and significantly reduce the cost of raw materials.

2. Protein in latex reclaimed rubber

Nitrogen-containing compounds in latex reclaimed rubber are all proteinaceous materials, which can prevent the aging of rubber compounds. Alkaline nitrides can promote the vulcanization of reclaimed rubber compounds. However, proteins themselves are easy to absorb water, deteriorate, and produce odors, resulting in electrical insulation of latex reclaimed rubber products. The decline in properties, so latex reclaimed rubber is mostly not used in the production of electrical insulation rubber products.

3. Acetone extract in latex reclaimed rubber

One of the main indicators for judging the quality of reclaimed rubber by rubber products manufacturers mainly refers to higher fatty acids and sterols in latex reclaimed rubber products. Among them, higher fatty acids can promote vulcanization of rubber compounds and increase plasticity of latex reclaimed rubber; sterols can prevent Latex reclaimed rubber and products are aged.

4. Ash in latex reclaimed rubber will reduce rubber insulation and even accelerate aging

The ash content is another main indicator for judging the quality of latex reclaimed rubber. Inorganic salt compounds such as calcium, magnesium, potassium, sodium, iron and phosphorus in latex reclaimed rubber absorb moisture in the rubber compound, reduce the electrical insulation of the rubber compound, and change the price. Metal ions also accelerate the aging rate of latex reclaimed rubber.

5. The influence of moisture in latex reclaimed rubber on the processing of recycled rubber products

Moisture can cause the latex reclaimed rubber to mold during storage, causing the powdery complexing agent to form a mass during mixing, and generate bubbles during calendering, pressing or vulcanization. Therefore, the moisture content of the latex reclaimed rubber usually cannot exceed 1%. Need special attention.

In fact, in addition to rubber hydrocarbons, protein, acetone extracts, ash and moisture, latex reclaimed rubber itself has some compounding agents such as fillers, anti-aging agents and rubbers added in the production process of waste natural rubber products and waste latex products. Oil, etc., therefore, when using latex reclaimed rubber, it is also necessary to consider the influence of other ingredients on the performance of latex reclaimed rubber, and rationally design the latex reclaimed rubber product formula to further optimize the quality of latex reclaimed rubber products while reducing costs.