The manufacturing process of the PP packing belt is firstly the temperature control of the extruder, generally in the range of 250 ° C to 280 ° C. The next step is cooling. After the material is taken out of the machine head, the temperature is very high. It should be cooled into the water immediately, because the isotactic polypropylene is easy to form a twin structure in the case of rapid cooling, and the twin crystal structure is loose. Easy to stretch orientation for high quality products. It is then stretched and the purpose of stretching is to increase the longitudinal strength of the strap and reduce the elongation. Stretching must be carried out in boiling water, usually in one stretch. Finally, the embossing, the stretched packing belt passes through two patterned pressure rollers, and is pressed on the pattern. Its function is to increase friction during use, not to slip, and look beautiful from the outside.
PET plastic strip plastic belt (also known as PET belt) is a new type of strapping belt that is popular in the world for replacing steel belts.
Widely used in steel, aluminum, chemical fiber, cotton spinning, tobacco, paper, metal cans and other industries.
Low elongation: Elongation is only one-sixth of that of polypropylene (PP) tape, which can maintain tension for a long time.
Strong temperature resistance: the melting point is 260 degrees, and the use is not deformed below 120 degrees.
Good flexibility: no sharp edges of steel belts, safe operation, neither hurting hands nor damaging the bundled objects.
Beautiful and rust-free: no steel belt rust pollution of the bundled objects, the color is bright and can be seen.
1. Strong tensile strength:
2, the elongation is small: the elongation is only one-sixth of the polypropylene (PP) belt, which can maintain the tension for a long time.
3, strong temperature resistance: the melting point is 260 degrees, 120 degrees below the use of no deformation.
4, good flexibility: no sharp edges of the steel belt, safe operation, neither hurting the hand nor damage the bundled objects.
5, beautiful and not rust: no steel belt does not pollute the bundled objects, the color is bright and can be seen.