Composition And Importance Of Glass Fiber Sizing

Sizing is very important for the production and application of glass fiber. If this lubricating and adhesive substance is not coated on the fiber surface during the high-speed drawing of extremely fine glass fiber, not only will the wire breakage and flying wire be caused by severe wear, making the drawing operation impossible, but also it is unimaginable to process hundreds or even thousands of smooth and dispersed, brittle and easy to break monofilaments into some practical products.

The main components of the sizing are adhesive film-forming agents, lubricants, antistatic agents and coupling agents.

1. Binder, the main component to maintain the integrity of the original fiber, determines the stiffness or softness of the original fiber to meet the process requirements of different types of glass fiber products. This component is used in the largest amount in the sizing formula.

2. Lubricant refers to a substance that lubricates the surface of glass fiber in wet and dry states and reduces wear. Its amount in the sizing composition is generally 0~5%. As a wetting lubricant, Tianshi wax emulsion can lubricate and protect glass fiber during glass fiber drawing and reprocessing, reduce the hairiness of glass fiber caused by mechanical wear, and give glass fiber good smoothness.

3. Antistatic agent can effectively reduce the static effect of glass fiber during processing and use, especially in glass fiber sizing that needs to be chopped.

4. Coupling agent, through its own two reaction properties, combines glass fiber with polymers such as resin, plays a bridging role, and achieves a good interface bonding between inorganic and organic substances. Make glass fiber reinforced materials obtain satisfactory application effects. In addition, there are some auxiliary ingredients, such as wetting agents, pH regulators, plasticizers, cross-linking agents, defoaming agents, pigments, etc.

With the continuous innovation of sizing agent technology, the use of some functional sizing agents enables glass fiber to improve the mechanical properties of resins and give composite materials other excellent properties such as hydrolysis resistance and aging resistance.

At present, glass fiber is still in a rapid development stage, and research on wetting agents is also ongoing. Therefore, there will be opportunities to produce glass fibers with better performance and more functions in the future.