Liquid Silicone for Silicone Vacuum Bag Film

INTRODUCTION
        HONG YE JIE's liquid silicone rubber is perfect for silicone vacuum bag composites for yacht and shipbuilding industry:
        The silicone vacuum bag composite material used in yacht and shipbuilding industry is an environmentally friendly silicone material. The silicone material meets the requirements of material vacuum forming. The reusable silicone bag is faster, cheaper and environmentally friendly than the traditional composite forming method. The silicone bag is more heat-resistant and chemical erosion of resin. The processing process is safe and has no peculiar smell. The silicone rubber bag can be reused. It is estimated that the new process can save 90% of labor cost.

        The traditional vacuum bag is only produced from polypropylene. This material is expensive and can only be used once, which is time-consuming and difficult to use, and there are still marks on the surface of the mold, because the bag is not completely evacuated

        Generally speaking, there are two ways to make silicone rubber vacuum bags. One is to brush liquid silicone manually. This process costs a lot of labor and has low production efficiency. Therefore, one process is to spray liquid silicone out by machine. This production process has higher production efficiency and less labor.



APPLICATION
        At present, the silicone vacuum bag process has been widely used in the field of composite material filling and molding mold.
        The silicone vacuum bag made of liquid silicone can replace the vacuum bag film. Its operation process is to make the silicone vacuum bag by brushing or spraying on the mold surface, and then use the silicone vacuum bag to make the whole or parts of large composite materials; Due to the unique properties of liquid silicone rubber: high tear resistance, pull resistance, acid and alkali resistance, aging resistance, high and low temperature resistance and low linear shrinkage, the integrity and stability of product quality can be guaranteed during the introduction of vacuum composite materials, and the prepared silicone vacuum bag can be reused, which greatly improves the production efficiency and effectively reduces the production cost, At present, the liquid silicone rubber for making silicone vacuum bag has basically replaced the vacuum bag of other materials and become the core material of the manufacturing process of composite materials.


ADVANTAGES
        The vacuum introduction process uses one side mold and one side silicone rubber vacuum bag to make large composite parts, complex composite products, FRP resin products, main bearing components of aerospace equipment, etc. the reusable silicone vacuum bag plays an important role in the vacuum introduction process, which not only simplifies the operation of sealing and forming process, At the same time, the production cost of labor and time is greatly reduced, and the stability, integrity and degree of quality of new composite products are greatly guaranteed when vacuum resin is introduced.

        In the composite molding technology, the materials used to prepare vacuum bags include nylon film, polyimide film, polyester film, aluminum foil, etc. However, with the development of thermal expansion properties of silicone rubber, liquid silicone rubber has gradually replaced vacuum bags and has been widely used in recent years. The specific method is to lay the fiber on the rigid female mold, and then lay the silicone vacuum bag made of liquid silicone on the fiber to seal it well, and then inject the resin. The procedure of this technology is similar to that of vacuum bag, but silicone rubber is used to replace the position of vacuum bag membrane. Vacuum bag autoclave forming process has also been often used in the past, which is mainly used to produce some main load-bearing components in aerospace equipment. However, this process has high cost and strict requirements for operation, so it can not be used to manufacture components with complex structure. After liquid silicone rubber replaces vacuum bag membrane, these problems have been solved. It can not only be used to manufacture components with complex structure, but also reduce the operation difficulty and cost.