The types of raw material resins used in the manufacturing of fiberglass mainly include unsaturated polyester resin (UP), epoxy resin, phenolic resin, thermosetting resin (furan resin, melamine formaldehyde resin, polybutadiene resin, organic silicon resin, etc.), polyurethane resin, and other thermoplastic resins, such as polyethylene, polypropylene, polystyrene, styrene acrylonitrile resin (SAN or AS resin), ABS resin, polyamide, polycarbonate, polyformaldehyde, polyimide, modified polyimide, polysulfone, polysulfone ether, polyaryletherketone, polyphenylene sulfide, aromatic polyester and other thermoplastic resins.
The most commonly used one is unsaturated polyester resin, due to its wide range of raw materials, low price, simple molding process, low molding temperature, and low production cost.
There are many types and trademarks of unsaturated polyester resins, and their classification status is also different.
If classified by product function, it can be divided into the following categories:
△ Universal unsaturated polyester resin: This type of resin is the most commonly used type, such as 191, 196 resins, etc.
Flexible unsaturated polyester resin: After being made into fiberglass products, this resin exhibits good flexibility. Its trademarks are TM182, 304, T541, etc.
△ Elastic unsaturated polyester resin: This resin has high flexural strength, is more tough and non brittle, and is suitable for manufacturing high-end furniture coatings, as well as machine casings.
Chemical resistant unsaturated polyester resin: This type of resin has good corrosion resistance function, because there are many types of corrosive media, different corrosion-resistant resins can be used for different media. Its trademarks include 197, 3301, 323, MFE-2, etc.
△ Flame retardant unsaturated polyester resin: This type of resin can be divided into synthetic and additive types, both of which can achieve flame retardant effects. Its trademarks are: 7901, S-906, TM302, 317, etc.
△ Heat resistant unsaturated polyester resin: This type of resin can be used to produce fiberglass products at higher temperatures, with a thermal deformation temperature of at least 110 ℃. Its trademarks are TM197, TM199, S685, etc.
△ Light stable and weather resistant unsaturated polyester resin: This type of resin has good resistance to atmospheric aging, can be used for a long time when exposed to sunlight conditions, and still retains a certain degree of functional use. Its trademarks are TM195, S692, F45, 515, etc.
△ Air drying type unsaturated polyester resin: This type of resin has air drying properties, that is, it is cured when exposed to air, and its surface will not become sticky, in order to improve its process function and product application function. However, its curing conditions are still the same as those of general-purpose unsaturated resins, cured at low temperature or room temperature. Its trademarks are: SGA20, tung acid type unsaturated polyester resin, etc.
△ Casting type unsaturated polyester resin: This type of resin is a type of resin with low shortening and low heat release. Its primary characteristic is that it will not crack or rupture during casting, which can prevent stress concentration, and has light color and good transparency. Its trademarks are SB39, S793, etc.
△ Unsaturated polyester resin for gel coating (commonly referred to as gel coating resin): This type of resin is very important in the manufacturing of fiberglass products. It not only serves as a protective layer for the exterior of fiberglass, but also serves as a decoration effect for the exterior, playing a very important role. Due to the different application environments and requirements of fiberglass products, it is necessary to choose different types of adhesive coating resins based on practical conditions. The current trademarks are TM-33, TM-35, S-739, gel coat 33, etc
SMC/BMC specific unsaturated polyester resin (referred to as SMC/BMC specific resin): The primary characteristics of this type of resin are low viscosity, fast thickening, high activity, rapid curing, good water and heat resistance, and good stability. The current trademarks are: 22, S-816, S-817, etc
