Introduction Food Grade HCR Silicone Rubber

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  • Date:2021/07/13

Foshan Tian Bao Li Silicon Engineering Co., LTD are a professional high tensile strength HTV silicone rubber factory. TBL silicone is the brand of Foshan Tian Bao Li Silicon Engineering Co., LTD . TBL silicone was top leading manufacture of HCR silicone rubber from 2011. we are the only one HCR silicone rubber full-automatic production line in the whole silicone rubber industrial in china . product range: HCR rubber, Food Grade HCR silicone rubber, HCR silicone rubber ,medical grade liquid silicone rubber, high transparent liquid silicone rubber ,room temperature vulcanized and industrial silicone rubber,capacity :15000MT capacity of Heat Cure Rubber(HCR) and 8000MT capacity of Liquid Silicone Rubber( LSR),We have 30 engineers for research can make any OEM HCR silicone rubber.Please check our factory photos :


一、Common food grade HCR silicone rubber can be divided into two broad categories :


1. Precipitation HCR Silicone Rubber, It is mainly produced by Na2SiO3 solution precipitated by SiO2 to produce coarse particles, which will turn white when stretched, and the appearance is translucent. The cost of raw materials is relatively cheap and the price is cheap. The market calls this: precipitated silicone rubber .Show the models of our factory:TBL-500A, TBL-500, TBL-501,Every Model has 30,40,50,60,70,80Hardness .Each model is suitable for different products, and you must choose the appropriate model according to your end product. Our products have Certificates: ISO, REACH, ROHS, LFGB, UL&FDA certificated.


2. Fumed Heat cure Rubber silicone rubber (HCR Rubber) ,mainly produced by the mixed combustion of SiCl4 and H2 and O2 to produce fine particles, which will not turn white when stretched, and can be stretched longer without breaking. The appearance is transparent, the cost of raw materials is high, and the price is high , generally used for products with high requirements, so the cost is higher,The market calls this: fumed silicone rubber .Show the models of our factory:TBL-900 and has 20,30,40,50,60,70Hardness .


二、There are two different forming ways of HCR silicone rubber:



Definition: Molding molding, also known as pressing molding, is the mixture of good rubber material in the mold cavity, with the help of pressure and heat, so that the material is filled with the mold cavity, the formation of the same products with the mold cavity, and then after heating to solidify the demoulding, its molding products is molded products.It is suitable for Food Grade HCR Silicone Rubber .

2.Extrusion molding

Definition: extrusion forming in rubber processing is the process of making various continuous products by a single screw extrusion mechanism.Such as pipes, sealing strips, wire and cable cladding.It is suitable for Food Grade HCR Silicone Rubber.


三、When using HCR rubber , Curing Agent must be added. Different processes have different Curing Agent:


1. Molding : can only be used for molded Curing Agent: 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane, abbreviation: DMDBH or double-2,5 ,It must be added .


2. Extrusion molding: can only be used for Extrusion Curing Agent: 2,4-dichlorobenzoyl) peroxide, abbreviated as: DCBP Or double-2,4 ,It must be added .


四、Packaging :  standard export package,20 kgs per carton .




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