As an innovative composite molding technology, silicone vacuum bagging has been widely used in many industrial fields in recent years. This technology not only solves many problems in traditional composite production, but also significantly improves production efficiency and product quality.
The main advantage of silicone vacuum bags is their reusability. Compared with traditional disposable plastic vacuum bags, silicone vacuum bags are not only environmentally friendly, but also greatly reduce production costs. When workers use silicone vacuum bags, they do not need to perform tedious degassing operations, thereby reducing the volatilization of harmful gases such as styrene, improving the working environment and increasing work efficiency. At the same time, silicone vacuum bags have excellent high-temperature resistance, can work for a long time at a high temperature of about 200°C, and can even withstand high temperatures of 300°C for a short time, ensuring the stability and integrity of composite materials during high-temperature curing.
The main application of silicone vacuum bags in the production of composite materials is the vacuum forming process. In this process, a mold and a silicone bag are used to prepare large composite parts. In the specific operation, the preform is first sealed between the mold and the silicone vacuum bag, and then vacuumed and uniformly pressed to make the product more compact, increase the fiber-resin ratio, and thus improve the mechanical properties of the product. According to the different requirements of composite materials, the vacuum forming process can be divided into dry vacuum bag process (i.e. vacuum resin introduction process) and wet vacuum bag process (such as prepreg process and hand lay-up bag pressing process).
In the dry vacuum bag process, dry fibers are laid first, then vacuum bags are used to maintain pressure, and then resin is introduced. In the wet vacuum bag process, the resin-impregnated reinforcing material is first placed and then vacuumed. Regardless of the process, silicone vacuum bags play an important role. It not only simplifies the sealing and molding process operations, but also ensures the stability and quality integrity of composite products.
Another important feature of silicone vacuum bags is their excellent physical properties. This material is non-toxic and odorless, and has passed international standards such as RoHS and MSDS certification, ensuring safety and environmental protection during production, processing and use. At the same time, silicone vacuum bags have the characteristics of high tear resistance, acid and alkali resistance, and aging resistance, and can withstand multiple mold reshaping and reuse, further reducing production costs.
In specific product manufacturing, the use of silicone vacuum bags is also extremely flexible. It can produce bags of various required sizes according to different production needs, with good consistency, and can produce complex parts. In addition, silicone vacuum bags are also suitable for resin impregnation, prepreg molding and curing operations. They are not limited by product thickness, can be deep vulcanized, molded and brushed, and are easy and convenient to use.
In general, silicone vacuum bags, as an innovative composite molding technology, have been widely used in wind turbine blades, automobile parts, yachts, ships and other industrial fields due to their excellent properties such as reusability, high temperature resistance, environmental protection and non-toxicity, and high tear resistance. It not only improves production efficiency and reduces production cost, but also significantly improves product quality and stability, injecting new vitality into the development of composite materials industry.
