Selling transparent PET 0.125mm with good light transmittance at low price

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Brief description of transparency
In the current important field of synthetic materials, polyethylene terephthalate occupies an important position, especially in fiber-level films. Its application in hollow containers is particularly significant, with low production costs, good electrical properties, and toughness that is difficult to match with other plastics. Due to its unique properties, it rapidly became an engineering plastic in the 1960s. Development, at present, extremely alloys are mainly used in automobiles, electrical, machinery, food and other fields. However, at common processing parameters (~℃), the crystallization speed is slow and the water absorption is large, which affects its performance parameters, so some It has limited its wide application, but in the late 1970s, through various enhanced modifications, it could make up for its own shortcomings through blending and improve its overall performance
Transparent general performance
Usually milky white or light yellow, it is a highly crystalline polymer resin with good surface finish and smoothness, and good transparency. Because of the orientation force of the crystal, it has good film-forming properties and good transparency. , good outdoor use ability, and the amorphous state has excellent optical properties, certain light transmittance, wear resistance, stable size, outstanding insulation properties, small creep, bending resistance, etc., and performs well in the thermoplastic family It has the highest toughness, and its performance is less affected by temperature changes. It is non-toxic, has excellent weather resistance, and is highly inert to general chemicals. However, it is resistant to acids and organic solvents and is easily broken down in hot water bubbles. Warping deformation occurs. Even so, 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 and its extremely low cost Film-forming properties are very suitable for applications in the packaging field. However, its heat sealability is poor, so the most common materials are bottled materials, such as cosmetic bottles, beverage cans, daily necessities packaging bags, pharmaceutical bottles, and some chemical bottles. In the past, it was used as wine packaging bottles, but because its barrier properties still did not meet the ideal standard, it was gradually replaced by other plastics. It can also be used to make foam materials, single and double films, in sheets and other The field of folding bags is widely involved. 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 The latter can also be used in plastic packaging materials for foods that are sterilized by microwave heating or cooking.
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.