Sell Raw Material
1.resins:
1-1. unsaturated polyester resin
1-2. vinylester resin
1-3. epoxy resin
1-4. silicone resin
2. additives:
2-1. calcium carbonate
2-2.silica
2-3.talc
2-4. titan
2-5. aerosol
3. fibers:
3-1. woven roving
3-2.chop strand mat
3-3. chop
4. proxide
5. cobalt octat
6. mold release
7.epoxy adherence
8.BMC dough
Epoxy adhesives
Epoxy adhesives are the bulk of glues which are known as building or engineering adhesives (which include polyurethane, acrylic, cyanocarile and other chemicals). These adhesives are used to build airplanes, cars, bicycles, boats, golf tees, skis, snowboard games and other applications where strong bonds are needed. Epoxy adhesives can be applied to almost all applications. They can be used as glue for wood, metal, glass, stone and many plastics.
They can be made soft or firm, clear or opaque, colored, fast freezing or freezing. Epoxy adhesives have better thermal and chemical stability than conventional adhesives. In general, cooked epoxy adhesives have a higher thermal and chemical stability than those cooked at room temperature. The strength of epoxy adhesives is reduced at temperatures above 350 ° F (177 ° C). Some epoxies are cooked by ultraviolet light. These epoxies are commonly used in optics, fiber optics, and electronics.
Electronic electrical systems
The formulation of epoxy resins in the electronic industry is important and applies to motors, generators, converters, gear boxes, pods and cylinders. Epoxy resins are excellent electrical insulators and protect electrical components from short circuit, dust, and moisture. In the electronics industry, epoxy resins are used as the main resin for integrated circuits, transistors, and composites, and for printed circuit boards. The largest type of circuit board board - FR-4 boards. Compressive layers of glass-coatedSoft epoxy resins are flexible and flexible in converters and vagaries. By using a vacuum suction on a raw epoxy, winding coils to the coil, winding to the core, and the screw are removed to the air cavities of the air. Cooked An electrical insulator and a conductor are much better than air. The hot transformer and dip galvanizing positions are greatly reduced, giving components a more stable and lasting viability of other products. Epoxy resins are used with resin distribution technology. glass composites By using an epoxy resin.
Consumer and marine applications:
Epoxy materials are sold in hardware stores, usually in a package containing a separate resin and should be mixed immediately before use. They are also sold in boat shops as repair resins for marine applications. Epoxies are not usually used on the outer layer of a boat because they are exposed to UV light.
They are often used in repair and assemble of the boat, and then coated with conventional coatings or dual-glazed polyurethane paints that protect against UV. There is a major dividing line in marine applications
Due to better mechanical properties than the more common polyester resins, epoxies are commercially used for components with high strength / weight ratios. In the other hand the properties of the fill gap and excellent adhesion to many materials Includes boom wood in simple structural projects involving aircraft and ships. Normal formulation of gelatin for polyester and vinyl ester resins will not stick to the epoxy surface and if epoxy resin applied to polyester resin levels, Adhesion will be very lilely to have Flocoat, which is usually used to cover the interior of the polyester recreational boat They are also compared with epEpoxy materials tend to tighten gradually, while polystyrene materials tend to tighten rapidly, especially if many catalysts are used.
Chemical reactions in both cases will heat up a large amount of mixture of required heat and very high reaction speed, so usually small quantities that can be used quickly are mixed, while the fog usually consists of polyester resins and doses Epoxy bonded together. Their properties vary enough to be considered as separate materials. Polyester resins often have little strength unless used with a reinforcement such as fiberglass, rather durable, except for reinforcement And little adhesion epoxies.
In contrast, epoxies are inherently strong, they are somewhat flexible and have excellent adhesion. However, polyester resins are much cheaper. Epoxy resins usually require a mixture of two components that make up the third chemical. Depending on the characteristics required, the ratio may be 1: 1 or above 10: 1, but in all cases they should be thoroughly mixed. The final product Plastic is heat resistant. As long as they are mixed, the two components are relatively stable, although hardeners tend to have high chemical activity, they must be protected against atmospheric humidity. The reaction speed can be changed by using different hardeners or by controlling the temperature as possible. It changes the nature of the final product. In comparison, polyester resins are generally widely available, as the progress of the previous mixed resins from liquid to solid is current, albeit very slowly. The only variable available to the user is to change the rate of this process using a catalyst, which is often methyl ethyl, ketone peroxide, which is highly toxic. The presence of a catalyst in the final product reduces the desired properties, so the quantitative amount of the catalyst is preferred until the tensile current is reached at an acceptable speed. The cooking speed of the polyester can be controlled by the amount and type of catalyst as well as by the temperature.
As epoxy adhesives, they bond with three methods
Lev) Mechanical: Because the roughness of surface
B) in the vicinity: because cooked resins are physically close to the binding surface, making it difficult to separate them.
C) ionized: since epoxy resins form an ion bond at an atomic surface with a bonding surface.
The latter is intrinsically stronger than the rest. By contrast, polyester resins can only bond with the first two, which greatly reduces the usefulness of them as glue and in marine repair.