Question 2: What is PET film 1? Chemically, PET is polyethylene terephthalate, and the chemical formula of PET is -[OCH2-CH2OCOC6H4CO].
2.PET polyester film is called PET film for short. It is characterized by high temperature resistance, good printability, easy processing, good pressure resistance and insulation, flame retardancy through UL certification 94VTM-2, and environmental protection through SGS and ROSH certification. It is a film material made of polyethylene terephthalate through extrusion and biaxial stretching. It is a colorless, transparent and glossy film with excellent mechanical properties, high rigidity, high hardness and toughness, puncture resistance, friction resistance, high and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention. It is one of the commonly used barrier composite membrane substrates. Polyester film, however, is expensive, with a general thickness of 0. 12mm. It is often used as an outer material for cooking and packaging, and has good printability.
Question 3: What does polyester mean? Polyester (pet) is a kind of chemical fiber, formerly called "polyester". Harmless to human body.
Question 4: the use of polyester film The price of polyester film is relatively high, and the thickness is generally 0.012 mm. It is often used as the outer material for cooking and packaging, and has good printability. Moreover, due to the complexity and difficulty of judging polyester film, it has brought many difficulties to customs supervision.
Question 5: Introduction of Polyester Film Polyester film is a kind of polymer plastic film, which is increasingly favored by consumers because of its excellent comprehensive performance. Because China's production and technical level can't meet the market demand, some of them still need to be imported.
Question 6: What does film mean? 1. film means very thin. The film is a thin and soft transparent sheet.
2. The film is made of plastic, adhesive, rubber or other materials. The scientific explanation of polyester film is: two-dimensional material formed by atoms, molecules or ions deposited on the surface of substrate. Examples: optical film, composite film, superconducting film, polyester film, nylon film, plastic film, etc. Thin films are widely used in electronics, machinery, printing and other industries.
Thin film material refers to a thin metal or organic layer with a thickness from a single atom to several millimeters. Electronic semiconductor functional devices and optical thin films are the main applications of thin film technology.
3. There is no uniform regulation on the classification of film varieties. Usually people are used to the following three classification methods:
(1) According to the raw materials used for film formation, there are polyethylene film, polypropylene film, polyvinyl chloride film and polyester film.
(2) According to the use of the film, there are agricultural films (here, according to the specific use of agricultural films, they can be divided into plastic films and greenhouse films); Packaging film (packaging film can be divided into food packaging film and packaging film of various industrial products, etc. According to its specific use), special-purpose breathable films, water-soluble films and films with piezoelectric properties.
(3) According to the film forming method, there are films that are extruded and plasticized and then blown, which are called blown films; After extrusion and plasticization, the film cast by molten material from the die is called cast film; A film made of plasticized raw materials through several rollers on a calender is called a calendered film.
Question 7: What is polyester film and where is it used? Polyester film (PET)
Polyester film is a film material made of polyethylene terephthalate by extrusion and biaxial stretching. It is a colorless, transparent and glossy film with excellent mechanical properties, high rigidity, high hardness and toughness, puncture resistance, friction resistance, high and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention. It is one of the commonly used barrier composite membrane substrates. However, the price of polyester film is relatively high, with a general thickness of 12mm. It is often used as an outer material for cooking and packaging, and has good printability.
Before you know what polyester film is, you'd better know about polyester, which will be of great help to you:
Polyester polyester
The general name of polymer compounds condensed from dihydric alcohol or polyol and dibasic acid or polybasic acid. Include polyester resin, polyester fiber, polyester acid adhesive, etc.
Example:
Polyester polyethylene terephthalate (PET) is a high molecular compound. Polyethylene terephthalate (PET) is produced by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG), and part of PET is finally produced by underwater granulation. Fiber-grade polyester chips are used to manufacture polyester staple fibers and polyester filaments, and are raw materials for processing fibers and related products in polyester fiber enterprises. As the largest variety of chemical fiber, polyester occupies nearly 80% market share in chemical fiber industry, so the market change and development trend of polyester series are the focus of chemical fiber industry.
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.
In recent years, with the rapid economic development in China, the apparent consumption of polyester chips in China has increased rapidly. The polyester production capacity in China has developed rapidly. In 2004, the fluctuation of world oil price triggered the change of international raw material market, but the development of polyester raw material industry in China lagged behind the downstream industries, and the domestic polyester raw material market was highly dependent on imports. Therefore, in 2004, the polyester series market was completely dominated by the trend of polyester raw materials, showing a continuous upward trend driven by costs. At the same time of the annual increase, the downstream price transmission of petrochemical industry weakened, which made the benefits of polyester industry fall sharply, polyester fiber was on the verge of loss, and polyester industry entered the downturn of industry reshuffle. In this market situation, production enterprises need to make macro and micro analysis of the industry, and need to study and investigate international and domestic production, sales, market competition, market structure, international trade and other aspects in order to formulate corresponding strategies and development plans.
Question 8: A transparent film. Some people say what is polyester film? 5 points is usually used for nameplates.
The nameplate is attached to the machine.
Question 9: The classification of polyester films can be divided into the following two types according to the different raw materials and drawing processes used to produce polyester films: 1 and BOPET. BOPET is made of bright materials (also known as bright materials, that is, high-grade films with titanium dioxide content of 0. 1% in raw polyester chips, which are made by drying, melting, extrusion, casting and vertical and horizontal stretching, and have a wide range of uses. BOPET film has the characteristics of high strength, good rigidity, good transparency and high gloss. Odorless, tasteless, colorless, non-toxic, outstanding toughness; Its tensile strength is three times that of PC film and nylon film, and its impact strength is three to five times that of BOPP film. It has excellent wear resistance, folding resistance, pinhole resistance and tear resistance. The thermal shrinkage is very small, and it only shrinks1.25% after 120℃ and 15 minutes; It has good antistatic performance, is easy to vacuum aluminize, and can be coated with PVDC, thus improving its heat sealing, barrier and printing adhesion; BOPET also has good heat resistance, excellent cooking resistance, low-temperature freezing resistance, good oil resistance and chemical resistance. Except nitrobenzene, chloroform and benzyl alcohol, most chemicals can't dissolve BOPET film. However, BOPET will be corroded by strong alkali, so attention should be paid when using it. BOPET film has low water absorption and good water resistance, and is suitable for packaging foods with high water content. 2. Unidirectional stretch polyester film (CPET for short) is a film made of semi-dull material (titanium dioxide is added to raw polyester chips) through drying, melting, extrusion, tape casting and longitudinal stretching. It has the lowest grade and price in polyester film, and is mainly used for packaging tablets. Due to the small consumption, manufacturers rarely produce on a large scale, accounting for about 5% of the polyester film field, and China enterprises rarely import it, with the standard thickness of150μ m ... Because of the characteristics of polyester film, it has different uses. Different uses of polyester films have different requirements for raw materials, additives and processing technology, and their thickness and technical indicators are also different; In addition, only BOPET has multiple uses, so all films classified by use are BOPET. Can be divided into the following categories: 1, electrical insulation film. Because of its good electrical, mechanical, thermal and chemical inertness, good insulation performance and high breakdown voltage resistance, it is specially used for electronic and electrical insulation materials. Common standard thicknesses are: 25μm, 36μm, 40μm, 48μm, 50μm, 70μm, 75μm, 80μm, 100μm and 125μm (. Includes wire and cable insulation film (thickness 25-75μm) and touch switch insulation film (50-75μm). 2. Capacitance film. It has the characteristics of high tensile strength, high dielectric constant, low loss factor, good thickness uniformity, good electrical performance and high resistance, and has been widely used in capacitor dielectric and insulation interlayer. Common standard thicknesses are 3.5μm, 3.8μm, 4μm, 4.3μm, 4.8μm, 5μm, 6μm, 8μm, 9μm, 9.8μm, 10μm and 12 μ m. 3. Card protective film. It has good transparency, high rigidity, good thermal stability, smooth surface, excellent winding performance, uniform longitudinal and transverse tensile properties and excellent waterproof, oil-proof and chemical-resistant properties. It is specially used for the protective packaging of pictures, certificates, documents and office supplies, so as to make them smooth and beautiful after hot stamping as a protective film, and to keep the original clear and undistorted. Commonly used standard thicknesses are 10.75μm, 12μm, 15μm, 25μm, 28μm, 30μm, 36μm, 45μm, 55μm, 65μm and 70μm, among which 15μm or above is mainly used as laser anti-counterfeiting base film or high-grade ones. 4. Universal membrane. It has excellent strength and dimensional stability, cold resistance and chemical stability, and is widely used in composite packaging, photographic film, metal evaporation, audio-visual recording and other substrates. Specifically, there are the following types: ① Semi-reinforced membrane. The most important feature is high longitudinal tensile strength, which is not easy to break under large tensile force. Mainly used for packaging and sealing boxed articles. Common standard thicknesses are 20μm, 28μm, 30μm, 36μm and 50 μ m ... ② foil film. The biggest characteristics are good tensile strength and transparency, stable thermal performance and low binding force with some resins. It is mainly suitable for small size changes in high temperature processing or as a transfer carrier. The conventional standard thickness is 9μm, 12μm, 15μm, 19μm, 25μm and 36 μ m .. ③ Printing composite packaging film. The main features are good transparency, good penetration resistance, excellent chemical resistance, temperature resistance and moisture resistance. Suitable for packaging frozen food, food, medicine, industrial products and cosmetics. Common standards ... >>