Wuhan Modern Low Density Polyethylene Heavy Packing Bag (Film)
DATE：2020/4/11 8:49:41 / READ： / SOURCE：This station
Wuhan Modern Low Density Polyethylene Heavy Packing Bag (Film)
(1) Heavy packaging bags (films) are mainly used for industrial packaging bags with contents ranging from 20 to -30 kg, including hollow board equipment for chemical fertilizers and chemical industry www.handern.com.
Packaging of raw materials, synthetic resin, feed, etc.
(2) Almost all heavy packaging films are processed by blow molding. This method is mostly air-cooled, and there are also water-cooled, bag-making www.handern.com hollow board equipment.
There are two methods, one is heat sealing, and the other is adhesive bonding. The thickness of the film is 0.2 ～ 0.35mm; it is generally 0.20mm abroad, but it also tends to be thinner, such as its thickness is 0.15mm
The heavy packaging film is generally processed by using a heavy packaging blow molding auxiliary machine and an extrusion main machine, such as the SJ-FMZ800 heavy packaging film blow molding auxiliary machine and the S-90X25 plastic extruder produced by the Dalian Rubber and Plastic Factory in China. Supporting use, can continuously blow polyethylene heavy packaging film of certain specifications www.handern.com hollow board equipment.
The auxiliary machine includes a film blowing head, a primary cold air device, a foam stabilizing frame, a secondary air cooling device, a traction device, a surface treatment device and a winding device.
(3) Both low-density resins for heavy packaging films are special grades with MFR values of 0.5 to .810 min. Several types of heavy packaging film materials produced in China are PE-FA-18D006, MFR is 0.48g / 110min; PE-FA23D003, MFR is 0.4g / 10min; PE-FA-23D002, MFR is 0.3g / 10min. Foreign countries tend to lower the hollow board equipment of www.handern.com.
The amount of vinyl acetate-based products, vinyl acetate content is mostly 2% to 6%. In order to make the thickness of the film thinner and the MFR decrease, the content of vinyl acetate is appropriately increased to increase the density of the product, and the homopolymer has been used less.
(4) Production example of heavy packaging film This example uses light packaging equipment to produce heavy packaging film, which is more convenient for the use of heavy packaging film. The example solves two main problems: ① The extrusion capacity of the extruder should be sufficient; ② The extruded bubble cooling should be filled with the hollow plate equipment of www.handern.com.
Minute. Increase the screw speed to make it meet the extrusion requirement. The extruder of the middle 65 is increased from 15-45mn to 1001o-mi, and the extruder of 0 is increased from the original 45rfm to 78rin. The original film traction auxiliary machine is 4m high, and the distance from the die plane to the nip roll is only 3m. During the blowing process of this pair of polyethylene heavy packaging films, at least 6-8m is required for tube bubble cooling The height is too different. But to raise the current machine
Not only is it time-consuming, but also very difficult, so the measures taken are to install 1-2 layers of air ring cooling, and change the original herringbone roller to a metal plate water-cooled herringbone plate, namely: Yang
Rong Neixi, fit this title www.handern.com hollow board equipment.
1) Air cooling method, the original one air ring is equipped with a blower with a pressure of 21.3315kPa, and two air rings are used instead. Two 21.3315kPa blowers can also be used for cooling and setting.
2) Wind ring structure: The wind ring gap is openable and rotates clockwise or counterclockwise. When the wind ring is covered, the wind ring gap can be large or small to adjust the air volume. The air inlet of the wind ring is three angles of 120 °.
3) The water-cooled herringbone board can adjust the amount of water sprayed to match the cooling and shaping of the film bubble by the air ring, and also has the effect of preventing the film tube from wrinkling. As long as the air ring and the water-cooled herringbone plate are properly matched, even if there is only about three meters between the die and the nip roller, the problem of cooling and setting of the film tube can be solved. 4) Process conditions The process conditions of the three extruders are shown in Table 2-1-13.
(5) Low density polyethylene heavy packaging bag (film) standard Low density polyethylene heavy packaging bag (film), the original light industry standard is QB224-1981 stipulated dimensions, tolerances, appearance requirements, physical and mechanical properties, see the original for details standard.
Cigarette-low-density polyethylene heavy packaging bag (film), due to its film thickness (more than 0.2mm), it consumes much material, has high cost, and is easy to slide.
Stacking can not be high, and the rate of broken bags is high, which has been gradually replaced by polyolefin woven bags in China. However, its manufacture is relatively simple, the process is short, and it is easy to recycle and reuse. It still has a certain value, and it is still used abroad. If the shortcomings are improved, it can also be repacked with other. www.handern.com Hollow board equipment.
9.
(1) Heavy packaging bags (films) are mainly used for industrial packaging bags with contents ranging from 20 to -30 kg, including hollow board equipment for chemical fertilizers and chemical industry www.handern.com.
Packaging of raw materials, synthetic resin, feed, etc.
(2) Almost all heavy packaging films are processed by blow molding. This method is mostly air-cooled, and there are also water-cooled, bag-making www.handern.com hollow board equipment.
There are two methods, one is heat sealing, and the other is adhesive bonding. The thickness of the film is 0.2 ～ 0.35mm; it is generally 0.20mm abroad, but it also tends to be thinner, such as its thickness is 0.15mm
The heavy packaging film is generally processed by using a heavy packaging blow molding auxiliary machine and an extrusion main machine, such as the SJ-FMZ800 heavy packaging film blow molding auxiliary machine and the S-90X25 plastic extruder produced by the Dalian Rubber and Plastic Factory in China. Supporting use, can continuously blow polyethylene heavy packaging film of certain specifications www.handern.com hollow board equipment.
The auxiliary machine includes a film blowing head, a primary cold air device, a foam stabilizing frame, a secondary air cooling device, a traction device, a surface treatment device and a winding device.
(3) Both low-density resins for heavy packaging films are special grades with MFR values of 0.5 to .810 min. Several types of heavy packaging film materials produced in China are PE-FA-18D006, MFR is 0.48g / 110min; PE-FA23D003, MFR is 0.4g / 10min; PE-FA-23D002, MFR is 0.3g / 10min. Foreign countries tend to lower the hollow board equipment of www.handern.com.
The amount of vinyl acetate-based products, vinyl acetate content is mostly 2% to 6%. In order to make the thickness of the film thinner and the MFR decrease, the content of vinyl acetate is appropriately increased to increase the density of the product, and the homopolymer has been used less.
(4) Production example of heavy packaging film This example uses light packaging equipment to produce heavy packaging film, which is more convenient for the use of heavy packaging film. The example solves two main problems: ① The extrusion capacity of the extruder should be sufficient; ② The extruded bubble cooling should be filled with the hollow plate equipment of www.handern.com.
Minute. Increase the screw speed to make it meet the extrusion requirement. The extruder of the middle 65 is increased from 15-45mn to 1001o-mi, and the extruder of 0 is increased from the original 45rfm to 78rin. The original film traction auxiliary machine is 4m high, and the distance from the die plane to the nip roll is only 3m. During the blowing process of this pair of polyethylene heavy packaging films, at least 6-8m is required for tube bubble cooling The height is too different. But to raise the current machine
Not only is it time-consuming, but also very difficult, so the measures taken are to install 1-2 layers of air ring cooling, and change the original herringbone roller to a metal plate water-cooled herringbone plate, namely: Yang
Rong Neixi, fit this title www.handern.com hollow board equipment.
1) Air cooling method, the original one air ring is equipped with a blower with a pressure of 21.3315kPa, and two air rings are used instead. Two 21.3315kPa blowers can also be used for cooling and setting.
2) Wind ring structure: The wind ring gap is openable and rotates clockwise or counterclockwise. When the wind ring is covered, the wind ring gap can be large or small to adjust the air volume. The air inlet of the wind ring is three angles of 120 °.
3) The water-cooled herringbone board can adjust the amount of water sprayed to match the cooling and shaping of the film bubble by the air ring, and also has the effect of preventing the film tube from wrinkling. As long as the air ring and the water-cooled herringbone plate are properly matched, even if there is only about three meters between the die and the nip roller, the problem of cooling and setting of the film tube can be solved. 4) Process conditions The process conditions of the three extruders are shown in Table 2-1-13.
(5) Low density polyethylene heavy packaging bag (film) standard Low density polyethylene heavy packaging bag (film), the original light industry standard is QB224-1981 stipulated dimensions, tolerances, appearance requirements, physical and mechanical properties, see the original for details standard.
Cigarette-low-density polyethylene heavy packaging bag (film), due to its film thickness (more than 0.2mm), it consumes much material, has high cost, and is easy to slide.
Stacking can not be high, and the rate of broken bags is high, which has been gradually replaced by polyolefin woven bags in China. However, its manufacture is relatively simple, the process is short, and it is easy to recycle and reuse. It still has a certain value, and it is still used abroad. If the shortcomings are improved, it can also be repacked with other. www.handern.com Hollow board equipment.
9.
Author：admin