The shock-absorbing material is made from natural rubber, and the manufacturing process of such product is as follows:

Abstract

OCR09WP06 / 05 / 2569 This invention proposes a shock-absorbing material made from natural rubber and a process for manufacturing such a product. It consists of light silica, polyethylene glycol, and silane fillers mixed together and is called a fluid. Polymers that exhibit dilatant properties or are high shear viscosity fluids (shearthickening fluids) (STF). The process involves incorporating or mixing a dilatant fluid within molded natural rubber material into a foam. Foam sheets, films, or bags can enhance the shock-absorbing properties of the resulting material.

Claims

OCR09WP06 / 05 / 25691. Shock-absorbing material made from natural rubber consists of: - Molded natural rubber sponge with a volume of 1 cubic centimeter per 10-30 percent by volume of dilatant. The dilatant product consists of: - 10-50 percent by weight of dilatant solid particles; - 50-90 percent by weight of dilatant polymer carrier; and additional components may include: - 2-5 percent by weight of dilatant silane filler. Solid particles can be selected from silica particles, oxide particles, calcium carbonate, natural minerals, synthetic minerals, or polymers such as polystyrene.

1. The polymer carrier material is selected from polyethylene glycol, ethanol, silicone oil, or phenyltrimethicone.

2. The reinforcing material is produced from natural rubber according to claim 1, where the suitable solid particles are silica particles at a concentration of 25-30 percent by weight of dilatant.

3. The reinforcing material is produced from natural rubber according to claim 2, where the average particle size of silica is 1-100 nanometers.

4. The reinforcing material is produced from natural rubber according to claim 1, where the suitable polymer carrier material is polyethylene glycol at a concentration of 70-75 percent by weight. 5.The reinforcing material is manufactured from natural rubber according to Patent 1, where the silane filler is an organosilanes with organo or silica-carbon functional groups within the structure, selectable from bis-(3-triethoxysilylpropyl)tetrasulfide, vinyl tri-2-methoxyethoxysilane, and bis-(3-triethoxysilylpropyl)disulfide.

6. The reinforcing material is manufactured from natural rubber according to Patent 1, where the appropriate silane filler is bis-(3-triethoxysilylpropyl)tetrasulfide at a concentration of 2-5 percent by weight.

7. Manufacturing process. The process for producing the rubber-based shock-absorbing material under claim 1 is as follows: a. The mold is coated with 10% calcium nitrate and baked at 60-120 degrees Celsius for 5-15 minutes. Then, the foam compound latex is poured into the mold and baked at 60-120 degrees Celsius for 1-5 hours. In this step, molded rubber is obtained as a sponge. b. Dilatant is inserted into the molded rubber sponge obtained from step a. In this step, dilatant-containing rubber foam is obtained. c. The dilatant-containing rubber foam obtained from step b is then used for further processing.The workpiece surface is coated with a latex coating formula or an exterior rubber coating formulated for natural rubber to prevent leakage of dilatant fluid, and then cured again at a temperature of 60-120 degrees Celsius for 5-8 hours or until dry. At this stage, the rubber foam, a shock-absorbing material from natural rubber, is obtained.

8. The process for manufacturing shock-absorbing material from natural rubber according to claim 7, which in step b.There are two methods for injecting dilatant into natural rubber foam: Method 1, Natural Rubber Foam Filled with Dilatant (NRF), is used for molded natural rubber foam with large voids. 10-30% by volume of the product is added to the voids of the foam, then a foam compound is poured over the top to seal the dilatant-filled foam. The foam is then cured at 60-120 degrees Celsius for 10-20 hours or until it is fully cured. The first method involves removing the workpiece from the mold and allowing it to cool. This produces rubber foam with dilatant. The second method is impregnation or brushing onto natural rubber foam (NRI). This is used for molded natural rubber foam that has a porous structure. Dilatant is applied at a rate of 10-30 percent by volume of the product onto the molded natural rubber foam. It is then baked at 60-120 degrees Celsius for at least 5 minutes or until the foam is dry. It is then left to cool. This process yields rubber foam with dilatant.