Stretch film is generally made of high-quality materials, so you need to pay attention to the correct professional cutting method to ensure the integrity of the stretch film. Then how to cut correctly when cutting and what should be paid attention to?

 

1. Sawing is divided into manual sawing and machine sawing. The main tool for manual sawing is manual hacksaw, which is divided into movable type and fixed type, which are composed of saw bow and saw blade.

 

2. Saw cutting means that the sawing machine is equipped with high-speed steel saw blades, which can cut metal and plastic films below DN200mm. Portable electric film saws are often used on the construction site. The largest cutting film diameter is about 550 mm.

 

3. The pressure test of the stretched film includes two aspects, the pressure test of the film product and the pressure test of the membrane channel system. The pressure test of the film product is to check the compressive strength and tightness of the film product. 

 

Generally, the surface pressure value is a multiple of the nominal pressure of the corresponding membrane product, or a specified value corresponding to the membrane channel level and membrane diameter.

 

4. After forming a system with various connection methods, it is necessary to check the compressive strength and tightness of various membrane products. The test pressure value is usually regarded as a multiple of the system design pressure, that is, the working pressure of the system.

 

When the stretched film is cut, harmful substances in the water can be removed, and the normal operation of the equipment can be ensured. Therefore, various food-grade or sanitary-grade polyethylene stretched films with special membrane element structures are more and more widely used. application.