The sizing agent requirements of the fiberglass deep-processing products is divided into in two ways. Firstly,the sizing agent requirement of original yarn, which requires the sizing agent can give glass fiber with good cluster, wear resistance and high strength(the highest tensile strength can reach 0.5N / Tex or more),good performance of weaving and deep processing. Secondly, the sizing agent requirements of end products deep products (various fabrics, carpets, belts, etc.), it requires the surface of the glass fiber infiltration and deep processing of the coating and the matrix resin has good compatibility, the above two specific requirements are as follows
Fiberglass decorative materials and sound-absorbing insulation materials used in industrial fabrics
These industrial yarns require the sizing agent to have good effect on the yarn cluster protection, high yarn strength, few filaments, and no formaldehyde and other harmful substances to escape, high performance enhanced textile-type sizing agent, starch-type sizing agent, the improved paraffin-type sizing agent can also be used.
Fireproofing and dedusting industrial fabrics
Many national laws stipulates that families, restaurants and public places should be equipped with fiberglass fire blankets, fire blanket fabric requires final treatment to remove the organic matter to prevent smoking, the general use of starch-based sizing agent in order to facilitate the removal of glass fiber surface sizing agent. Environmentally friendly dust bag is also a major industrial application of the industrial fabrics. For using bulked yarn to heat insulation, it’s better to use enhanced textile-based sizing agent for industrial fabrics of deducsting, in order to facilitate the combination of coating and fiber glass.
The base fabric of air ducts
In order to improve the surface treatment effect of the air duct base fabric, the coupling agent is often in the infiltration agent coupling agent. The coupling agent of neoprene air ducts base fabric of the sizing agent is mercapto silane coupling agent, such as A-189 (United States carbon), KH-590 (China brands), Z-6062Z (US Dow Corning). Silicone rubber fiberglass base fabric with sizing agent coupling agent of methyl triacetoxy silane coupling agent, PTFE coated glass fiber base cloth with sizing agent coupling agent methyl tri-tert-butyl peroxy silane coupling agent.
Electrical insulation laminates and casing often use enhanced textile sizing agent, copper clad laminate base fabric 7628, 2116 because of the need for surface heat cleaning, so often use starch sizing agent.
Mesh fabric
In order to improve its alkali resistance, acrylic resin penetration of mesh fabric should be good, while requiring infiltration agent film should be waterproof, so generally using the enhanced textile-type sizing agent, and it’s the best to use the cross-linked acrylic emulsion and ring Oxygen emulsion.
Window screening
Screening requires high strength, wear-resistant, good cluster, so requires the strong bonding of the formation of the sizing agent, good lubrication Lubricant and does not affect the glass fiber coating. Thus, the enhanced textile sizing agent is often used.
Glass fiber bulked yarn
During the puffing process of the glass fiber, and due to the impact of high-pressure air violent, fiber and airflow, fiber and fiber will have a strong friction. In order to make the fiber go through the puffing process successfully, and does not produce a large number of broken fiber, fiber glass filament, it requires soft, abrasion resistant, flexing resistant, good lubrication glass fiber.Besides the diameter of the single wire and twist, the the protection of sizing agent is very important factor.If the protection effect is large, it will affect the puffing process; if the protection effect is small, there will be a large number of fiber breakage, low strength retention. Therefore, the infiltration of glass fiber suitable protection is critical, so the dedicated sizing agent of bulked yarn should be used.
Membrane
The Membrane material with high elastic modulus and high tensile strength glass fiber, But the fiber is easily damaged by repeated compression, in order to overcome the shortcoming, using the smaller diameter fiber to reduce the damage.The Monofilament diameter is about 4～5μm, called yarn B, the requirements of yarn on the textile process performance are particularly high, thus usually using a special starch-based sizing agent.
The glass fiber sizing agent of Geogrid
The glass fiber yarn of geogrid should be made by interweaving direct rovings which is leaked by 2000 hole board in plain weave pattern. Because of its single yarn, tension uniformity, high strength, and when it is weaving by warp knitting machine, through the yarn guide hole and weft through the pinhole, it is not easy to wear or plug the pinhole to cause the broken yarn. The strength of direct yarn is greater than 0.4 N/Tex, to ensure the strength of the finished geogrid (many factories have reached 0.55N/Tex).The sizing agent is similar with the winding yarn sizing agent, the main film-forming agent is epoxy resin emulsion, the high-performance bisphenol A-based polyester emulsion can also be the main film-forming agent, and upplemented by efficient lubricants. This kinds of products require strong adhesion after the formation of the sizing agent, the glass fiber bundle is good, and does not produce scattered filaments and sporadic monofilament which is not sticky(or scattered wire and broken monofilament accumulation, plug the pinhole, resulting in broken yarn), while the sizing agent can not be sticky after film formation, the sticky and thick sizing agent will rub, plug the pinhole, also cause serious broken yarn. Thus, about the design project of sizing agent formulation, control the infiltration of solid content and use a variety of high-performance, excellent performance matching sizing agent to get the best results.
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Development of sizing agent for fiberglass products.pdf