• Categories:Industry news
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• Time of issue:2022-07-15
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(Summary description)(1) Surface properties. The surface area of ​​glass fibers depends on the fiber thickness. In the production process of certain types of filter materials (such as filter paper), the glass fiber does not expand, so the fiber diameter, cross-sectional geometry and corresponding specific surface area remain unchanged. This dimensional stability is necessary to ensure that the filter media has both low resistance and high efficiency under high flow conditions.
(2) Mechanical strength. The strength of glass fiber is related to many conditions such as raw material glass composition, fiber forming method, whether the fiber surface is defective or not, and the physical and chemical interaction with the surrounding medium. Glass fibers are hydrophilic and will reduce surface energy when adsorbed by water. The tensile strength of glass fiber will decrease by 15% to 30% in moist air and water. If the adsorption of moisture contained in the air can be excluded, the glass fiber has considerable strength no matter in high temperature or low temperature. In order to improve the properties of glass fiber, spray adhesive materials are often used in the production process of glass fiber, which not only makes the fibers overlap each other, but also changes the fiber properties, so that some products have a moisture absorption rate of less than 1%, which is repellent. The water content is more than 98%, and it has good chemical stability.