Chongqing Weichuan Printing Equipment Co

We have a large number of stocks in stock, welcome to call us for a transparent and simple description
In the current important field of synthetic materials, polyethylene terephthalate occupies an important position, in the application of fiber-level films, especially in hollow containers. It is particularly remarkable, has low production cost, and has good electrical properties. Its toughness is also difficult to compare with other plastics. Due to its unique properties, it developed rapidly as an engineering plastic in the 1960s. As of now, , extremely alloys are mainly used in automobiles, electrical, machinery, food and other fields. However, under common processing parameters (~℃), the crystallization speed is slow and the water absorption is large, which affects its performance parameters, thus partially limiting its wide application , but in the late 1970s, through various enhanced modifications, it made up for its own shortcomings through blending and improved its overall performance
Transparent general performance
Usually appears milky white or light Yellow, a highly crystalline polymer resin with good surface finish and smoothness, and good transparency. Due to the existence of crystal orientation force, it has good film-forming properties, good transparency, and good outdoor use ability. The amorphous state has excellent optical properties, a certain degree of light transmittance, wear resistance, stable dimensions, outstanding insulation properties, small creep, and bending resistance. It shows the highest toughness in the thermoplastic family, and Under the influence of temperature changes, its performance is less affected, non-toxic, has excellent weather resistance, and is highly inert to general chemicals. However, it is resistant to acids and organic solvents and is prone to warping deformation in hot water bubbles. In this way, due to its irreplaceable performance, it is still used in all aspects of life
Transparent application fields
Due to its outstanding performance in barrier properties, coupled with its own cheapness and film-forming properties, it is very suitable Application in the field of packaging, however, its heat sealability is poor, so the most common ones are bottled materials, such as cosmetic bottles, beverage cans, daily necessities packaging bags, medical bottles, and some chemical bottles, etc. In the past, it was It is used as a wine packaging bottle, but because its barrier properties are still not up to the ideal standard, it is gradually replaced by other plastics. It can also be used to make foaming materials, single and double films, and is often involved in the field of sheets and folding packages. , Thirdly, due to the renewable utilization characteristics of the material, in today's society that advocates environmental protection, polyethylene terephthalate is known as the fastest growing packaging material in the potential market. In addition, after foaming, it can also be used for economical use. Plastic packaging materials for microwave heating or steaming sterilized food.
Transparent processing technology
The crystallization speed of resin is very slow, but when making thick parisons, the low cooling rate will lead to crystallization, thus affecting the transparency of the product. Therefore, when the wall thickness of the parison has been determined, the cooling water temperature should be reduced as much as possible to increase the cooling rate. The cooling water temperature in this process is ~°C. During stretch blow molding of the parison, a certain tensile strain rate should be maintained. A large tensile strain rate results in a high degree of orientation, but if it is too large, it will destroy the structure of the polymer and cause tiny cracks in the container. In this stretch blow molding process, secondary inflation is adopted. The pressure of the preform during the first inflation is 0. The pressure of the preform during the second inflation is: If the shut-off pin cannot go down or there is a functional failure, the temperature of the hot runner module and the nozzle is too low. It is necessary to increase the shut-off pin appropriately and the shut-off nozzle has a lower spring. Failure, repair or replacement or functional failure, the shutoff pin conversion solenoid valve does not work, the repair piston ring is damaged, etc.
Transparent development prospects
Since the middle of the century, with the rapid development of the world's petroleum industry, polyester raw materials The market has been greatly enriched, and the polyester industry has developed rapidly. In the early stages, almost all of them were used to produce fibers. Since the 1990s, some countries have begun to devote themselves to the research and development of non-fiber uses. Plastics are the focus of application development and have been widely used. Their applications mainly involve polyester. Bottles, films and sheets, engineering plastics and other fields. By 2018, the world's plastic production has accounted for 10% of the total production, and the proportion is still increasing. Currently, plastic is one of the most important materials in the packaging industry. The main application areas are polyester bottles and polyester films for packaging. . The packaging industry has become the most important consumer area of plastics, and will remain the most important market for expanding the consumption of plastics.
The general performance resin is milky white translucent or colorless transparent body, with relative density light transmittance. It is a medium barrier material, with a permeability coefficient of The water absorption rate is , and the water absorption is larger.
The tensile strength of the mechanical properties of the film is very high, comparable to that of aluminum foil, three times that of aluminum foil, and three times that of aluminum foil. The reinforced creep property is small, the fatigue resistance is excellent (better than reinforced and), and the wear resistance and friction resistance are good. The mechanical properties are less affected by temperature.
Thermal properties The heat resistance of pure plastics is not high, but it is greatly improved after reinforcement treatment. The mechanical properties at ℃ are better than those of laminates. It is a better heat-resistant variety among reinforced thermoplastic engineering plastics. It has good heat aging resistance, its embrittlement temperature is ℃, and it still has certain toughness at ℃. Not easy to burn, the flame is yellow and dripping.
Although the electrical properties are polar polymers, they have excellent electrical insulation and can still be maintained well at high frequencies. The corona resistance is poor and cannot be used for high-voltage insulation. Electrical insulation is affected by temperature and humidity, and humidity has the greater impact.
Environmental performance contains ester bonds and is not resistant to water, acid, and alkali under high temperature and water vapor conditions. It has excellent weather resistance and can be used outdoors for a long time.
Our company's main models are as follows
Yiben Dongshan
Thickness
Thickness
Universal type)
Thickness
Special type)
thickness
thickness
thickness
thickness
old name)
thickness
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thickness
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thickness< br/> Two Toray
Thickness
Thickness
Thickness
Thickness
Thickness
Thickness
Three Kingdoms Kotutei
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Shibon Toyobo
Thickness
Thickness
Gokuni functional film suitable for printing, insulation
Rokukoku DuPont
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Our company's main models are as follows
United States
Printing film (suitable for board signs)
Brush grade and double-sided bright
Frosted/bright
br/> Bright and fine frosted texture/bright
Quasi-frosted texture/bright
Quasi-frosted texture/frosted
Quasi-frosted texture/bright fine frosted texture
Matte texture/frosted
Linear/bright
Bright and fine frosted grain/bright (light diffusion performance)
Two-color film
Brush-level double-sided bright
Three-purpose film

Four-fire film (up to/)
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Five-layer film
Chemical corrosion single-sided scratch-resistant series
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Chemical corrosion, single-sided scratch-resistant and UV-resistant series
(Weather-resistant coating optical grade)
Domestic＊Longhua＊
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Halogen flame retardant grade film, sheet film, sheet hard coating scratch resistance
Domestic＊Ogilvy＊
Printing grade
Ming
Sand
Japan＊Teijin＊
Ming(
Sand
Matte
Hong Kong＊Yoshikawa＊
River Transparent
Sichuan Frosted
Sichuan Fine Frosted
Our company has slitting machines, slicing machines, cross-cutting machines, plate cutting machines, and laminating and leveling machines. We provide slitting, slicing, and laminating , netting, plate making, printing OEM and other services.
The tape models sold by our company are as follows
Dong
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Sony
Model Specifications
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Supply Japan Jujo
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,, and, insulating oil carbon paste
,, series inks
, series, series, series Ink and other ten products produce functional ink
, Liselda series ink, etc.
, as well as other brands of insulating ink, carbon paste, and ink that our company represents are also comparable to the above products and offer excellent value for money.