Question 2: Is * * * polyester poisonous when drinking water? At present, it is non-toxic. It is a kind of material called triphenylmethane * * * polyester (Tritan), which is a new generation of * * * polyester material introduced by Eastman Company in the United States. Tritan*** polyester is a transparent, tough and BPA-free material. Compared with others, Tritan*** polyester has better impact resistance, heat resistance and dishwasher cleaning tolerance. In addition, Tritan*** polyester also has the characteristics of deodorization, deodorization and pollution resistance, and has high chemical stability and food safety.
Question 3: What kind of fabric is polyester fiber? This is the name of polyester. Merchants confuse consumers with this, because polyester is a low-grade and cheap fiber material.
Its advantages are firmness, wear resistance, stiffness, easy washing and drying, good color fastness, no fading and no shrinkage. The popular polyester in 1980s is blended polyester fabric. Disadvantages: fear of Mars, impoliteness, light transmission in case of water, floodlight at the friction part of fabric, poor thermal insulation performance, etc.
Question 4: What kind of material is * * * polyester? Also known as PET, it is a general term for polymers obtained by polycondensation of polyols and polyacids. Mainly refers to polyethylene terephthalate (PET), but also includes linear thermoplastic resins such as polybutylene terephthalate (PBT) and polyarylate (see color card). It is an engineering plastic with excellent performance and wide application. It is used to manufacture polyester staple fibers and polyester filaments, and is the raw material for processing fibers and related products in polyester fiber enterprises. At the same time, polyester is also used in bottles, films and other fields, widely used in packaging industry, electronic appliances, medical and health care, construction, automobiles and other fields. Packaging is the largest non-fiber application market of polyester and the fastest developing field of PET. It can be said that polyester chips are important intermediate products connecting petrochemical products and products from many industries. The raw materials are transparent in natural color and resistant to high temperature of 50-60 degrees Celsius. That is to say, at noon in summer, if you are exposed to the sun for a noon, the bottle will be deformed. This is the material of mineral water bottle.
Question 5: What fabric is polyester? Polyester and viscose fiber belong to chemical fiber fabrics, which are generally used in suits. This fabric does not wrinkle easily.
Question 6: What is polyester fiber? What fabric does it belong to? At first, the only polyester fiber used in textiles and clothing was polyester fiber, which is short for polyester fiber. The identification of fiber components only needs abbreviations, so polyester fibers are marked in formal clothing labels. However, with the progress and development of science and technology, polyester fibers used in textiles and clothing have included not only polyester (PET), but also two new types of polyester fibers, namely polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT). So polyester is no longer short for polyester fiber. PBT fiber and PTT fiber are two kinds of polyester fibers newly developed in 1970s and 20th century respectively. Originally mainly used in the field of engineering plastics, it has been widely used in the field of textiles and clothing. PBT fiber not only has some characteristics of polyester fiber, but also has better elastic recovery and flexibility than polyester fiber due to the increase of flexible parts in the basic chain of fiber macromolecules, and its dyeability is also better than polyester fiber. PTT fiber is obviously superior to PET fiber (polyester) and PBT fiber in performance. It overcomes the rigidity of PET and the flexibility of PBT. It has the dual advantages of polyester and nylon, and its comprehensive performance is excellent. It is considered as a promising new material in 2 1 century. According to the current fiber composition labeling regulations, "polyester fiber" and "polyester fiber" both meet the requirements, but their meanings are different. This is a polyester chip. This is the job of our factory. I definitely want to wear pure natural fabrics. This kind of gutter oil is no different from gutter oil. It seems that Chinese people still like cheap "gutter oil". No wonder it's so forbidden. It is not refined from pure oil. It is made of waste from petroleum refining, plastic waste and petroleum residue, and it will be highly toxic at high temperature. Now the price of polyester is rising, so the fabrics cheaper than polyester are actually mostly made of polyester residue, but they can't be seen after synthesis.
Question 7: What is the material of polyester fiber? Polyester fiber is a synthetic fiber spun from polyester condensed by organic diacid and diol. Polyester fiber produced in large quantities in industry is made of polyethylene terephthalate, and the trade name of China is polyester. It is the largest variety of synthetic fibers at present. Compared with natural fibers, polyester fibers have some disadvantages, such as low moisture content, poor air permeability, poor dyeability, easy pilling and pilling, and easy pollution.
Question 8: * * Is polyester material poisonous when drinking water * * * The thermal transition temperature of polyester is 70~80 degrees. If boiled water is injected, it will release harmful substances. Polyester bottle tablets are generally used as disposable packaging for soft drinks or outer packaging for stationery, toothbrushes and cosmetics. The healthiest and nontoxic ones are glass cups or solid-color ceramic cups. However, due to the brittleness of glass and ceramics, it is recommended to use polypropylene cups for fear that children will break and stab themselves, because polypropylene has good heat resistance. It is best to lock the cup with a lock, which is sold in all major shopping malls.
Question 9: What polyester is used for mobile phones? Polyester is rarely used in the shell of mobile phones, but polycarbonate is generally used, which is very different.
Polyester is a general term for polymers obtained by polycondensation of polyols and polybasic acids. Mainly refers to polyethylene terephthalate (PET), but also includes linear thermoplastic resins such as polybutylene terephthalate (PBT) and polyarylate. It is an engineering plastic with excellent performance and wide application. It can also be made into polyester fiber and polyester film. Polyester includes polyester resin and polyester elastomer. Polyester resins include polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyarylate (PAR). Polyester elastomer (TPEE) is a thermoplastic elastomer, which is generally polymerized from dimethyl terephthalate, 1, 4- butanediol and polybutyl alcohol. The chain segment includes hard segment and soft segment.
The chemical formula is as follows:
There are PET, PBT and polyarylate, and their characteristics are different from those in industrial production.
Polyethylene terephthalate has a glass transition temperature of 69℃, a softening range of 230 ~ 240℃ and a melting point of 255 ~ 260℃, and has good fiberization, mechanical properties, wear resistance, creep resistance, low water absorption and electrical insulation. PET was first made by J.R. winfield and J.T. Dixon of England in 194 1 by polycondensation of dimethyl terephthalate and ethylene glycol. Because of its good fiber-forming performance, the British Chemical Industry Company in Bremen conducted industrial experimental research at 1948 and used it as polyester fiber. In the same year, DuPont produced PET film. In 1950s, more and more countries realized industrialized production. 65438-0966 Akesu Company in the Netherlands studied the modification of PET by * * * polymerization, which greatly developed its molding process. Subsequently, Teijin Company of Japan developed glass fiber reinforced polyester, which can be used as engineering plastics. 1976, DuPont began to use it to produce beverage bottles, and then the consumption increased rapidly.
Poly (butylene terephthalate)
It has excellent comprehensive properties, with a glass transition temperature of 36 ~ 49℃ and a melting point of 220 ~ 225℃. Compared with PET, PBT has faster crystallization speed and better low-temperature formability. In terms of mechanical properties and heat resistance, although it is not as good as polyoxymethylene and polyamide, the mechanical properties and heat resistance are obviously improved after being reinforced with glass fiber. The tensile strength is 135 MPa and the thermal deformation temperature is as high as 2 10℃ (load is 186 MPa), which is higher than that of glass fiber reinforced nylon -6. Its water absorption is the smallest among engineering plastics. The product has good dimensional stability, is easy to be made into flame-retardant varieties, and has low price. The disadvantage is that the product is easy to warp and the molding shrinkage is uneven. PBT was first developed by Celanese Company of the United States in 1967 and industrialized in 1970. Since then, it has developed rapidly for more than ten years, with an average annual growth rate of 25% ~ 30%. 1982 There are more than 20 companies producing in nearly 10 countries in the world, among which Celanese Company of the United States, General Electric Company, Kodak Company of Heismann and BASF Company of the Federal Republic of Germany have large output. 1984 world output 120kt, which has become one of the top five engineering plastics.
Poly (aryl ester) is a kind of high-performance engineering plastic, which mainly includes poly (diallyl terephthalate), poly (p-hydroxybenzoate) and U- polymer. In addition, in 1984, the United States realized the first industrial production of liquid crystal self-reinforced plastic polyarylate for the first time, with an annual production capacity of 10kt.
① Poly (diallyl terephthalate): 1946, which has excellent electrical properties and dimensional stability. There are three companies in America and two in Japan.
② Poly (p-hydroxybenzoate): It has high heat resistance, can be used for a long time at 3 15℃, and also has high thermal conductivity, good wear resistance and radiation resistance, but it is difficult to process and has poor impact resistance, and can be modified by * * * polymerization. This product was developed by American emery Company on 1970.
③U-shaped polymer: polyaryl compound synthesized from terephthaloyl chloride or isophthaloyl chloride and bisphenol A, phenolphthalein or hydroquinone. It has good heat resistance, can be used for a long time at 130℃, is transparent, flame retardant and has good mechanical properties. Its impact resistance is similar to polycarbonate, and it can be processed by general thermoplastic molding method. U- polymer was produced by Yunich Card Company in 1973.
Polycarbonate (PC) is a kind of polymer with carbonate groups in its molecular chain, which can be divided into aliphatic, aromatic, aliphatic-aromatic and other types according to the structure of ester groups. Among them, aliphatic and aliphatic-aromatic polycarbonates have low mechanical properties, which limits their application in engineering plastics. Project ... >>