Polypropylene uniaxially stretched film
DATE：2019/11/25 8:59:11 / READ： / SOURCE：This station
Polypropylene uniaxially stretched film
1. Performance and application
The polypropylene uniaxially stretched film is similar to the high density polyethylene uniaxially stretched film. With a close-range one-way stretching process close to the width, the obtained film has less shrinkage in the web direction and is less likely to tear in the transverse direction while maintaining the advantage of high longitudinal tensile strength. Therefore, a film for packaging having a large longitudinal and transverse strength and a high longitudinal crack resistance can be obtained. Its biggest feature is the unique twisting (knot) performance of uniaxially stretched film. Widely used in the field of twist packaging. In addition, the flat yarn obtained by cutting the film can be woven into a bag, which is woven into a woven bag by a conventional method, and the woven fabric has less cracking phenomenon, and the strength before and after the knitting is reduced less, and the production efficiency is high.
2. Production process
The production process of polypropylene uniaxially stretched film is similar to that of high density polyethylene uniaxially stretched film, and the raw materials and production process conditions are different.
3. Production equipment
The equipment for producing uniaxially stretched film of polypropylene is similar to the equipment for producing high-density polyethylene uniaxially stretched film, and is only different in some places. For example, MFPU1090 is used for uniaxial stretching of high-density polyethylene, and MFPU-13115 is used for uniaxial stretching of polypropylene.
4. Production resin
The polypropylene uniaxially stretched film has a special resin, such as T-GS polypropylene resin produced by the olefin plant of Qilu Petrochemical Company of China, and the MFR is 3g/10min.
5. Production process conditions
The difference between the production process conditions of polypropylene uniaxially stretched film and high density uniaxially stretched film is: 1 extrusion plasticization temperature is generally higher than 10-20 ° C: 2 stretching temperature is higher by 10 ° C; 3 stretching ratio Can be higher, 6 to 10 times; 4 stretching distance can be wider, 60-1000 times the thickness of the unstretched film; 5. The heat treatment temperature is about 10 ° C, the contact time between the film and the heat treatment roll can be longer.
1. Performance and application
The polypropylene uniaxially stretched film is similar to the high density polyethylene uniaxially stretched film. With a close-range one-way stretching process close to the width, the obtained film has less shrinkage in the web direction and is less likely to tear in the transverse direction while maintaining the advantage of high longitudinal tensile strength. Therefore, a film for packaging having a large longitudinal and transverse strength and a high longitudinal crack resistance can be obtained. Its biggest feature is the unique twisting (knot) performance of uniaxially stretched film. Widely used in the field of twist packaging. In addition, the flat yarn obtained by cutting the film can be woven into a bag, which is woven into a woven bag by a conventional method, and the woven fabric has less cracking phenomenon, and the strength before and after the knitting is reduced less, and the production efficiency is high.
2. Production process
The production process of polypropylene uniaxially stretched film is similar to that of high density polyethylene uniaxially stretched film, and the raw materials and production process conditions are different.
3. Production equipment
The equipment for producing uniaxially stretched film of polypropylene is similar to the equipment for producing high-density polyethylene uniaxially stretched film, and is only different in some places. For example, MFPU1090 is used for uniaxial stretching of high-density polyethylene, and MFPU-13115 is used for uniaxial stretching of polypropylene.
4. Production resin
The polypropylene uniaxially stretched film has a special resin, such as T-GS polypropylene resin produced by the olefin plant of Qilu Petrochemical Company of China, and the MFR is 3g/10min.
5. Production process conditions
The difference between the production process conditions of polypropylene uniaxially stretched film and high density uniaxially stretched film is: 1 extrusion plasticization temperature is generally higher than 10-20 ° C: 2 stretching temperature is higher by 10 ° C; 3 stretching ratio Can be higher, 6 to 10 times; 4 stretching distance can be wider, 60-1000 times the thickness of the unstretched film; 5. The heat treatment temperature is about 10 ° C, the contact time between the film and the heat treatment roll can be longer.
Author：admin