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Special Silicon Rubber for Plastic Toys Date:2013-08-01

Plastic toys mold making silicon rubber is a kind of synthetic rubber, belonging to organic silica gel. It is one of the best high temperature resistant and cold resistant silicon rubber, generally in the 60 ~ 250 ℃ can still maintain good flexibility. Silicon rubber for plastic toys has excellent electrical insulating properties, and the stability of thermal oxidation and ozone is very high. Its thermal expansion coefficient and thermal conductivity are as 2-2.5 times and 2-3 times as the organic rubber respectively. According to the way of sulfide, it is divided into two categories, which are high temperature or heat vulcanized (HTV) silicon rubber and room temperature vulcanizing (RTV).


Properties of silicon rubber for plastic toys

Favorable hardness

Resistance to high and low temperature

Light viscosity and good flowability

Good characteristics of easy-operation

High duplication times, no expansion and deformation

Low linear shrinkage, and the shrinkage rate is less than 2‰ generally

High tensile & tear strength, acid and alkali-resistance and ageing resistance



Usage of silicon rubber for plastic toys

Step One: Take 100g of part A and add 2g of part B and mix the silicon rubber and curing agent evenly.

Notes: Moulding silicon rubber is a kind of flowing liquid and it contains two parts. Part A is a kind of white flowing liquid and part B is the curing agent. Remember to mix part A and part B evenly, otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What’s more, the finished moulds will meet a short life. All of these will cause a waste of silicon rubber.


Step Two: vacuum pumping

Without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.


Step Three: Brushing cast & Perfusion Molding operation


Step Four: Operations for the external mold

a. Make a square frame with four pieces of wooden boards or rubber plates, then place the product which is covered with the finished silicon rubber mould in the middle.

b. Slowly and evenly perfuse the gypsum into the square frame. Also you can brush the resin on the product which is covered with the finished silicon rubber mould with a brush or a brush pen. Repeat this process two or three time after the cross link reaction.


Silicon rubber for plastic toys



Shenzhen Hong Ye Jie Technology Co., Ltd., which was established in 1998, is a Science and technology corporation which is engaged in production, R & D, and sales of silicon rubber and silicon products. Our company provides raw materials of silicon rubber for plastic toys. The model codes of HY-728 is made for you!


Technical datasheets of silicon rubber for plastic toys






(Shore A0)

Tensile strength (MPa)

Tear-strength (kN/m)



Catalyst Mix Ratio (by weight)













Silicon rubber for plastic toys in different hardness and colors are available.

Different type of catalyst is available according to customer’s specific requirements.

All the parameters are for reference only, if you have special requirements please contact us.


Shenzhen Hong Ye Jie Technology Co., Ltd. is the silicon rubber for plastic toys manufacturer. What you need is what we pursue. We are sure that our silicon materials for plastic toys will bring you first class products, and we'll provide free technology service and free technical training on silicone mold making. If you need more information about our company and product, please visit our website:, or you can send us email right now at!

TypeInfo: Product News

Keywords for the information:Silicon rubber  Silicon rubber for toys  Silicon/Silicone  Silicone rubber