What additives are needed during the production of silicone fiberglass tubes?

Silicone Glass Fiber Tube has high electrical insulation, temperature resistance, corrosion resistance, aging resistance and heat dissipation, and because of its excellent softness and elasticity, it can also maintain its softness in a low temperature environment of minus 50°C It is resistant to bending and will not detract from its electrical insulation performance, so it is widely used in electrical appliances, motors, smelting, special equipment and other fields. Silicone glass fiber tubes have so many advantages, so what additive products are needed in the production process of silicone glass fiber tubes? Below, the editor will give you a detailed introduction to the additives in the production process of silicone glass fiber tubes.

1. Coupling agent; the function of the coupling agent is to combine the glass fiber with the sizing agent. The coupling agent is insoluble in water under normal conditions and is a chemical solution of an oily substance, which is soluble in water under certain conditions. There are many types of coupling agents with different chemical properties. In the production process, according to the properties of glass fiber and the types of production, coupling agents with different properties are selected to meet the performance needs of different products. Some coupling agents can be directly hydrolyzed, such as the commonly used KH550 coupling agent. Some coupling agents need specific acidic conditions to be hydrolyzed, such as KH570 coupling agent. Whether the coupling agent is completely hydrolyzed has a direct impact on the quality of glass fiber.
2. Lubricants: Lubricants in the silicone glass fiber tube sizing include ethers, alcohol copolymers, cationic amine salts, oleic acid esters, etc. Lubricants are added to avoid wool yarns from the glass fibers during production and use. If no lubricant is added, the wool yarn produced during the winding process will have a certain impact on product quality, and the silicone fiberglass tube will also cause yarn guide ring blockage or affect yarn dispersion during use. The amount of lubricant used must strictly follow the product instructions. Too much or too little amount of lubricant will have a great impact on the glass fiber production process and winding process. For example, if the amount of lubricant is too large, it will lead to the phenomenon of silk cake falling off and disordered yarn during the winding process.
3. Film-forming agent; silica gel glass fiber tube film-forming agent is a raw material that is coated on the surface of silica gel glass fiber tube in large quantities and can form a film at a certain temperature. The film-forming agent is also called a binder or a clustering agent. The film-forming agent is added to ensure that the glass fiber strands are bundled and keep the strands intact. It can determine the hardness of the glass fiber strands and the performance of the silicone glass fiber tube. . Commonly used film-forming agents include polyesters, epoxies, polyurethanes, acrylates, PVAC copolymers, etc. In the process of glass fiber production, the film-forming agent uses its own cohesive force to attach to the surface of the glass fiber, and at the same time uses its chemical properties to change the performance of the silicone glass fiber tube, so as to meet the use requirements of the silicone glass fiber tube. The film-forming agents required for different uses of silica gel fiberglass tubes are also different, for example: jet yarn, SMC yarn, BMC yarn, chopped strand mat yarn, direct yarn, pultrusion yarn, textile yarn, friction material yarn, engineering plastics Yarn etc. When using a film-forming agent, first check whether its appearance color is normal and whether there are stains, and it can be used after stirring evenly.
4. Sizing agent: Silicone glass fiber tube sizing agent should avoid mixing old and new batches of raw materials to ensure the purity of the sizing agent. The sizing agent emulsion must be continuously stirred during use to avoid precipitation. The prepared sizing agent emulsion should avoid delamination or failure of the sizing agent emulsion before use to prevent the instability of solid concentration. The preparation of the wetting agent should be strictly in accordance with the principle of small amount and multiple times. The prepared wetting agent emulsion should be used up within one working day, and the longest time should not exceed 24 hours. Some raw materials in the wetting agent are flammable and explosive substances, and it is strictly forbidden to contact with fire during use; and the wetting agent has certain corrosive and pungent odors, and dust-free clothes, gas masks and fully enclosed Glasses are available for preparation!