3 thoughts on “What are the characteristics of PE wound film?”
Julio
PE stretch film (also known as wound film) has high stretching strength, tear resistance, and good self -adhesion, so it can make the object wrap into a whole and prevent collapse during transportation. The membrane has excellent transparency. The wrapped object is beautiful and generous, and it can prevent the object waterproof, dustproof, and damage. This membrane is widely used in cargo tray packaging, such as electronics, building materials, building materials, chemicals, metal products, automotive accessories, wires and cables, daily necessities, food, papermaking and other bundles. Specifications: 500mm width of the machine, 300mm width of handmade film, 350mm, 450mm, 500mm, thickness 15um-50um. Various specifications can be cut online. Sticky separation, double -sided sticky, product separation film and machine winding membrane series. The characteristic: The product’s anti -buffer strength, the anti -tear resistance performance, thin thickness, and good performance are better. It has high stretching strength, tear resistance, transparency, and good retractable force. The pre -stretching rate is 400%. Uses: Wrapped in wrap and other entangled packaging, which is widely used in foreign trade exports. Bottle -making, papermaking, hardware appliances, plastic, chemical, building materials, agricultural products, food and other industries.
The wound film, also known as the stretch film and thermal contraction film. The earliest domestic PVC was used as a substrate, and the DOA was a plasticizer and a self -adhesive. Due to environmental protection issues, high costs (relatively large proportion of PE, small unit packaging area), poor stretchability, etc., when the PE stretch membrane began production in China from 1994 to 1995, it was gradually eliminated. The PE stretch film first uses EVA as a self -adhesive material, but its cost is high and tastes. Later, PIB and VLDPE are used as the self -adhesive material. The substrate is mainly LLDPE, including C4, C6, C8, and Maocal PE PE (MPE). Early LLDPE stretching membranes are mostly blowing membrane, from single layer to two and three layers; mainly the production of LLDPE stretching membranes based on the flow method. The process is shown in the figure below. The advantages of high degree of transparency can be applied to the requirements of high magnification pre -stretching. Because the single -layer stream cannot make a single -sided sticky, the application field is limited. Single and double -layer streams do not have three layers of streams in the material selection, and the formula costs are high, so the structure of three layers of commonly crowded is ideal. High -quality stretch membranes should have the characteristics of high transparency, high vertical elongation rate, high yield point, high horizontal tear strength, and good puncture performance. Due to the long and narrow flow channels, the flowing speed of the flow method is fast. The melt temperature range is generally controlled at 250 ° C to 280 ° C. Within 10kg, the adhesive agent moves out, while reducing the intra -end stress of the finished membrane. Good viscosity makes the packaging film layer outside the cargo sticking to the layer of the cargo to make the cargo firm. There are two main methods for obtaining viscosity: one is to add PIB or mother material to the polymer; Essence PIB is a translucent and viscous liquid. It is directly added with a dedicated equipment or transformation of the device. Generally, the PIB parent material is used. There is a process of movement of PIB. It usually takes three days, and it is also affected by temperature. When the temperature is high, the stickiness is strong; when the temperature is low, it is not sticky, and the viscosity is greatly reduced after stretching. Therefore, it is also within a certain temperature range of the finished film (it is recommended to storage temperature at 15 ° C to 25 ° C). Mixing VLDPE is slightly worse, but there is no special requirements for the equipment, the viscosity is relatively stable, not controlled by time, but also affected by the temperature. The temperature is relatively sticky when the temperature is higher than 30 ° C. When it is lower than 15 ° C, the viscosity is slightly worse. By adjusting the amount of adhesive LLDPE to achieve the required viscosity. This method is used for three layers.
The packaging of the tensile membrane must be stretched, and the stretching form of the handle mechanical packaging has direct stretching and pre -stretching. There are two types of pre -stretching, one is roller stretching, and the other is electric stretching. Direct stretching is completed between the tray and the membrane. This method is low (about 15%to 20%). If the stretching rate exceeds 55%to 60%, which exceeds the original yield point of the film, the membrane width is reduced, the puncture performance is also lost, the membrane is very very lost, the membrane is very very very very loser Easy to break. And at the 60%stretching rate, the tension is still very large. For light goods, the goods are likely to deform the goods. Pre -stretching is done by two rollers. The two rollers of the roller pre -stretch are connected by the gear unit. The stretching power can vary depending on the gear ratio. The tensile force is generated by the turntable. Because the stretch is generated within a short distance, the friction between the roller and the membrane between the roller and the membrane is It is big, so the membrane is width, and the original puncture performance of the film is maintained. During the actual winding, no stretching occurs, and the break from sharp edges or angles reduces the stretching rate to 110%. The stretching mechanism of electric pre -stretching is the same as roller stretching. The difference is that the two rollers are driven by electricity, and the stretching completely has nothing to do with the rotation of the tray. Therefore, the adaptability is stronger, light, heavy, and unsatisfactory goods are applicable. Due to the low tension during packaging, this method pre -stretching the stretching rate is as high as 300%, which greatly saves materials and reduces costs. Suitable for 15 to 24 μm for membrane thickness.
PE stretch film (also known as wound film) has high stretching strength, tear resistance, and good self -adhesion, so it can make the object wrap into a whole and prevent collapse during transportation. The membrane has excellent transparency. The wrapped object is beautiful and generous, and it can prevent the object waterproof, dustproof, and damage. This membrane is widely used in cargo tray packaging, such as electronics, building materials, building materials, chemicals, metal products, automotive accessories, wires and cables, daily necessities, food, papermaking and other bundles. Specifications: 500mm width of the machine, 300mm width of handmade film, 350mm, 450mm, 500mm, thickness 15um-50um. Various specifications can be cut online. Sticky separation, double -sided sticky, product separation film and machine winding membrane series.
The characteristic: The product’s anti -buffer strength, the anti -tear resistance performance, thin thickness, and good performance are better. It has high stretching strength, tear resistance, transparency, and good retractable force. The pre -stretching rate is 400%. Uses: Wrapped in wrap and other entangled packaging, which is widely used in foreign trade exports. Bottle -making, papermaking, hardware appliances, plastic, chemical, building materials, agricultural products, food and other industries.
The wound film, also known as the stretch film and thermal contraction film. The earliest domestic PVC was used as a substrate, and the DOA was a plasticizer and a self -adhesive. Due to environmental protection issues, high costs (relatively large proportion of PE, small unit packaging area), poor stretchability, etc., when the PE stretch membrane began production in China from 1994 to 1995, it was gradually eliminated. The PE stretch film first uses EVA as a self -adhesive material, but its cost is high and tastes. Later, PIB and VLDPE are used as the self -adhesive material. The substrate is mainly LLDPE, including C4, C6, C8, and Maocal PE PE (MPE). Early LLDPE stretching membranes are mostly blowing membrane, from single layer to two and three layers; mainly the production of LLDPE stretching membranes based on the flow method. The process is shown in the figure below. The advantages of high degree of transparency can be applied to the requirements of high magnification pre -stretching. Because the single -layer stream cannot make a single -sided sticky, the application field is limited. Single and double -layer streams do not have three layers of streams in the material selection, and the formula costs are high, so the structure of three layers of commonly crowded is ideal. High -quality stretch membranes should have the characteristics of high transparency, high vertical elongation rate, high yield point, high horizontal tear strength, and good puncture performance. Due to the long and narrow flow channels, the flowing speed of the flow method is fast. The melt temperature range is generally controlled at 250 ° C to 280 ° C. Within 10kg, the adhesive agent moves out, while reducing the intra -end stress of the finished membrane. Good viscosity makes the packaging film layer outside the cargo sticking to the layer of the cargo to make the cargo firm. There are two main methods for obtaining viscosity: one is to add PIB or mother material to the polymer; Essence PIB is a translucent and viscous liquid. It is directly added with a dedicated equipment or transformation of the device. Generally, the PIB parent material is used. There is a process of movement of PIB. It usually takes three days, and it is also affected by temperature. When the temperature is high, the stickiness is strong; when the temperature is low, it is not sticky, and the viscosity is greatly reduced after stretching. Therefore, it is also within a certain temperature range of the finished film (it is recommended to storage temperature at 15 ° C to 25 ° C). Mixing VLDPE is slightly worse, but there is no special requirements for the equipment, the viscosity is relatively stable, not controlled by time, but also affected by the temperature. The temperature is relatively sticky when the temperature is higher than 30 ° C. When it is lower than 15 ° C, the viscosity is slightly worse. By adjusting the amount of adhesive LLDPE to achieve the required viscosity. This method is used for three layers.
The packaging of the tensile membrane must be stretched, and the stretching form of the handle mechanical packaging has direct stretching and pre -stretching. There are two types of pre -stretching, one is roller stretching, and the other is electric stretching. Direct stretching is completed between the tray and the membrane. This method is low (about 15%to 20%). If the stretching rate exceeds 55%to 60%, which exceeds the original yield point of the film, the membrane width is reduced, the puncture performance is also lost, the membrane is very very lost, the membrane is very very very very loser Easy to break. And at the 60%stretching rate, the tension is still very large. For light goods, the goods are likely to deform the goods. Pre -stretching is done by two rollers. The two rollers of the roller pre -stretch are connected by the gear unit. The stretching power can vary depending on the gear ratio. The tensile force is generated by the turntable. Because the stretch is generated within a short distance, the friction between the roller and the membrane between the roller and the membrane is It is big, so the membrane is width, and the original puncture performance of the film is maintained. During the actual winding, no stretching occurs, and the break from sharp edges or angles reduces the stretching rate to 110%.
The stretching mechanism of electric pre -stretching is the same as roller stretching. The difference is that the two rollers are driven by electricity, and the stretching completely has nothing to do with the rotation of the tray. Therefore, the adaptability is stronger, light, heavy, and unsatisfactory goods are applicable. Due to the low tension during packaging, this method pre -stretching the stretching rate is as high as 300%, which greatly saves materials and reduces costs. Suitable for 15 to 24 μm for membrane thickness.