1. Synthetic resin is the base material for determining the quality of FRP water tanks. Loose glass fibers are bonded together as a whole. They mainly act as transfer stress. Therefore, the resin plays an important role in the strength of FRP tanks, especially in compression, bending and twisting. The shear strength is more pronounced. The resin content also affects the performance of FRP tanks. Usually the resin content is 20%-35%, which is related to the molding method and the type of reinforcing materials. For example, winding and compression molding, the resin content is low, while the hand lay-up, the resin content is slightly higher. The strength layer resin content is slightly lower, usually between 25% -40%; corrosion resistance, anti-seepage layer resin content is higher, generally more than 50% with glass cloth as a reinforcing material, resin content is lower than with glass mat. When the glass fiber surface felt is used as a reinforcing material, the content of the resin can be more than 85%. In addition, the resin is the matrix material that determines the quality of the FRP tank. It affects the elastic modulus, heat resistance, electrical insulation, electromagnetic wave transmission, chemical resistance, weather resistance, and aging resistance of FRP. For example, the chemical liquid etch resistance and water resistance of fiberglass depends mainly on the properties of the resin matrix. Usually unsaturated polyester resin 197# is resistant to chemical corrosion, while 1289# is better water resistant. Different types and grades of resins have different properties.
Second, glass fiber is the main bearing part of the determination of the quality of FRP water tank, it can not only improve the strength and elastic modulus of FRP, but also can reduce shrinkage deformation, increase heat distortion temperature and low temperature impact strength. For example 306# polyester resin castings after adding 50% glass cloth. The tensile strength can be increased from 50MPa to 200MPa, and the tensile modulus can be increased from 3.9GPa to 14GPa.
Third, the interface The so-called interface is the interface between any two-phase substances.
The quality of FRP water tanks is not only related to the reinforcing materials and synthetic resins used, but also to a large extent related to the bonding and durability of the interface between fibers and resins.
As we all know, glass fiber is a cylindrical glass, the surface is also as smooth as glass, and the surface is often firmly adsorbed with a thin layer of water, which of course affect the bonding properties of glass fiber and resin. In particular, in the process of drawing textiles, glass fibers are often coated with a sizing agent for purposes such as bundling, lubrication, and elimination of static electricity. Most of these sizing agents are paraffin-based substances that remain on the surface of glass fibers and are used for synthetic resins. Separation from the glass fiber, preventing the two bonding. Visible interface has a great influence on the performance of FRP. There are problems with the interface that need to be addressed. For example, the glass fiber surface is covered with a surface treatment agent so that the glass fiber and the resin can be firmly bonded together. This method is an effective way to improve the quality of FRP tanks, both at home and abroad are vigorously studied and adopted. Practice has proved that glass fiber and its fabric, after being treated with a surface treatment agent, not only improve the wear resistance, water resistance, and electrical insulation properties of glass fiber, but also enhance the strength of the quality of the glass fiber reinforced plastic water tank, especially in the wet conditions. .
In addition, there are interface problems in glass fiber reinforced plastics and other materials or glass fiber reinforced plastic itself. For example, to make glass fiber reinforced plastic anti-corrosion lining in the metal tank, it is necessary to clean the inner surface of the metal tank, such as removing dirt, oil, moisture, and rust layer. Sand blasting, pickling and other treatment methods are often used. If the metal surface treatment is not good, FRP patch will fail. Sometimes, there will be solidified glass fiber reinforced plastics. Bonding of glass fiber reinforced plastic will also have interface problems. Such as the use of layered curing process or repair of glass fiber reinforced plastic, etc., all need to be treated on the surface of glass fiber reinforced plastics to remove dirt, oil, water, etc., but also need to use surface sanding to increase the paste area, otherwise, it will appear Stratification.
It can be seen that the factors affecting the quality of FRP water tanks are not only the two major components of glass fiber and resin, but also the interface is very important. These three major elements are indispensable. They are closely related and inseparable. We call them three major factors, which are summarized in long-term practice.
Second, glass fiber is the main bearing part of the determination of the quality of FRP water tank, it can not only improve the strength and elastic modulus of FRP, but also can reduce shrinkage deformation, increase heat distortion temperature and low temperature impact strength. For example 306# polyester resin castings after adding 50% glass cloth. The tensile strength can be increased from 50MPa to 200MPa, and the tensile modulus can be increased from 3.9GPa to 14GPa.
Third, the interface The so-called interface is the interface between any two-phase substances.
The quality of FRP water tanks is not only related to the reinforcing materials and synthetic resins used, but also to a large extent related to the bonding and durability of the interface between fibers and resins.
As we all know, glass fiber is a cylindrical glass, the surface is also as smooth as glass, and the surface is often firmly adsorbed with a thin layer of water, which of course affect the bonding properties of glass fiber and resin. In particular, in the process of drawing textiles, glass fibers are often coated with a sizing agent for purposes such as bundling, lubrication, and elimination of static electricity. Most of these sizing agents are paraffin-based substances that remain on the surface of glass fibers and are used for synthetic resins. Separation from the glass fiber, preventing the two bonding. Visible interface has a great influence on the performance of FRP. There are problems with the interface that need to be addressed. For example, the glass fiber surface is covered with a surface treatment agent so that the glass fiber and the resin can be firmly bonded together. This method is an effective way to improve the quality of FRP tanks, both at home and abroad are vigorously studied and adopted. Practice has proved that glass fiber and its fabric, after being treated with a surface treatment agent, not only improve the wear resistance, water resistance, and electrical insulation properties of glass fiber, but also enhance the strength of the quality of the glass fiber reinforced plastic water tank, especially in the wet conditions. .
In addition, there are interface problems in glass fiber reinforced plastics and other materials or glass fiber reinforced plastic itself. For example, to make glass fiber reinforced plastic anti-corrosion lining in the metal tank, it is necessary to clean the inner surface of the metal tank, such as removing dirt, oil, moisture, and rust layer. Sand blasting, pickling and other treatment methods are often used. If the metal surface treatment is not good, FRP patch will fail. Sometimes, there will be solidified glass fiber reinforced plastics. Bonding of glass fiber reinforced plastic will also have interface problems. Such as the use of layered curing process or repair of glass fiber reinforced plastic, etc., all need to be treated on the surface of glass fiber reinforced plastics to remove dirt, oil, water, etc., but also need to use surface sanding to increase the paste area, otherwise, it will appear Stratification.
It can be seen that the factors affecting the quality of FRP water tanks are not only the two major components of glass fiber and resin, but also the interface is very important. These three major elements are indispensable. They are closely related and inseparable. We call them three major factors, which are summarized in long-term practice.
Single Handle Kitchen Faucets or taps frequently use one handle, more complex, valve controlled by a single handle (single handle mixer). The handle moves up and down to control the opening and turning off, and moves left and right to control the temperature of the water.
Single Handle Kitchen Faucets,Single Handle Kitchen Sink Mixer Tap,Single Lever Brass Kitchen Faucet,Single Handle Brass Mixer Faucet
Kaiping Jenor Sanitary Ware Co., Ltd , https://www.kpjenorsanitary.com