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Gong Wucai’s family is not very good. Like many people, after graduating from high school, he went out to work as a apprentice and worked as a lacquer master. He followed the decoration team all year round and ran around and was tired every day. Although I was very happy that my work was praised, every time I saw people happily moving into a new house, I was also bitterly thinking about when my parents could live in a new house.
Four years later, he finally saved enough money and decided to rebuild his house. In the rebuilding of the house, paint and paint are indispensable materials. During the years of staying in the decoration team, Gong Wucai has also found some ways to paint and paint. He knows that Dworkware's cost-effectiveness and quality are good. In the next day after returning to the store, he went directly to the Dejiao's store and set all the paints, inner walls, and outer walls to be used.
At the beginning, the family also said that he should not be so impatient, to shop around, after all, it is not easy to repair it again, say that the store is in another county, so far, if the product is not good, return anything is very troublesome That's not spending money to buy. In the face of family members' opinions, Gong Wucai did not say anything, but when you said it, you knew it.
On the day when the house was built, clean exterior walls, harmonious colors, and fresh air, the family looked at the beautiful new house so happy that they couldn’t hear each other. They all said that Gong Wucai’s vision was good, and the villagers also said that Gong was the best friend. The children are beautiful.
Many people asked Gong Wucai what kind of paint to use. The effect was so good. Gongwucai said it was a painter's lacquer. But when he heard that he would go to another county and buy it, he would be reluctant to look at them. In the financial center suddenly gave birth to an idea, there is no paint shop in the local, to buy paint to go very far, time-consuming and laborious, some of their own understanding of the German paint, and I heard that Dwork paint in recruiting franchisees, there are many supporting policies, if you can join, Do you not have to kill two birds with one stone when you open a paint shop?
Say it and do it. He immediately inquired about the opening of the paint shop, and went to the Dwork paint store to see, understand, but also in person to the headquarters of Dworkworks conducted a detailed consultation to understand the operating mode, joining conditions, Supportive efforts, and so on. "To be honest, I'm quite satisfied, so I'm on the spot."
After careful preparation, Gong Wucai's Degong Paint Store was officially opened. According to the company's plan and combined with its own advantages, coupled with the effect of Gong's new house, Gong Wucai soon opened up the local market. It's better to say it and use it to know that now my new family is basically introduced by old customers. Those who have used Dirham paint are repeat customers."
Gong Wucai said with a smile: "We have our own business and we have to thank our family for their support. Of course, we also thank you for your quality. Without your high quality products, without your support and help, alone, I cannot To be able to do it, I am very happy to be part of you."
At present, the five most commonly used Thermosetting Plastics in various fields are PU, epoxy resin (EP), silicone, unsaturated polyester (UP) and phenolic resin (PF).
Thermosetting Plastic has the following advantages:
Thermosetting plastic has a large rigidity and is extremely elastic and plastic deformation.The temperature has little influence on stiffness, and under the same load and temperature, the creep variable is much smaller than thermoplastic.Good heat resistance;The plastic parts are quite stable when heated.The size of the plastic parts is good. Thermosetting plastic is less affected by temperature and humidity, and Thermosetting plastic can be reduced after forming, making Thermosetting plastic easy to make plastic parts with high precision than thermoplastic ruler.Excellent electrical performance.Resistance to arc and voltage, etc.Good corrosion resistance, weak acid, weak base and organic solvents;Good processability, can be processed by various molding methods and other advantages.
Most thermosetting plastics have the following characteristics:
(1) excellent chemical resistance.
(2) it is usually brittle hard plastic, which can be filled with various fillers to form composite materials.
(3) compared with thermoplastic resin, the molding cycle is longer.
(4) all kinds of modification can be carried out, depending on the combination of resin, crosslinking agent, additive, etc., which can form composite materials with different properties.
(5) good heat resistance, the use of high temperature, Tg of thermosetting polyimide (PI) is about 350 ℃.
(6) can be used as raw materials to meet the application of various fields.Only 5% is used as injection molding material.
(7) the waste is generally used as filler after pulverization, which is difficult to recycle and pollutes the environment.
Due to the high heat resistance of thermosetting plastic, good dimensional stability, good line performance, anti-aging properties are better than thermoplastic plastic and low price, so it is widely used.The disadvantage is that the mechanical properties are poor and need to be enhanced.
It is mainly composed of thermosetting resins, which are involved in various necessary additives to form the plastic of the products.In the process of manufacturing or forming, the liquid will be liquid, which will not melt after curing or melt or soften again.Common thermosetting plastics include phenolic plastic, epoxy plastic, amino plastic, unsaturated polyester, alkyd plastics, etc.Thermosetting plastic and thermoplastic plastics constitute two major components of synthetic plastic.
Thermosetting plastic heating for the first time can soften the flow, heated to a certain temperature, react a crosslinking reaction and curing hardens, this change is irreversible, since then, heating again, already no longer soft flow.It is the use of this characteristic to make the molding process, using the plasticization flow of the initial heating, filling the cavity under pressure, and solidifying to become the product that determines the shape and size.
Thermosetting plastic is distinguished by a chemical reaction that is hardened by heating, pressing or adding the hardener at a definite temperature.After hardening, plastic chemical structure changes, the texture is hard, dissolves in the solvent, heating also no longer softens, if the temperature is too high then decompose.In thermoplastic plastic, the chains of resin molecules are linear or branched, and there is not any chemical bond between the molecular chains, which soften the flow when heated.The process of cooling and hardening is a physical change.
Formaldehyde cross linked plastic includes phenolic plastic, amino plastic (such as urea-formaldehyde - melamine - formaldehyde, etc.).Other cross linked types of plastic include unsaturated polyester, epoxy resin, prevalence, diallyl ester resin, etc.
The commonly used thermosetting plastics are phenolic resin, urea-formaldehyde resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin, polyurethane, etc.
Production:Phenolic resin PF (Bakelite sheet)
Phenolic resin is a part of the longest plastic varieties in history, commonly known as bakelite or electric wood, and the appearance is yellowish or black, which is the typical representative of thermosetting plastic.Bakelite sheet molding often use a variety of filling materials, according to different filling materials used, the product performance is also different, Bakelite sheet as molding material, mainly used in the field of need heat resistance, but also as a bonding agent used in plywood, grinding wheel and the brake pads.
Thermosetting Plastics
Thermosetting Plastic,Thermoset Molding Plastic,Mould Thermosetting Plastic,Thermoplastic Type Plastic
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