The cause of herbage membrane rupture

2022-06-07 17:30:15

Much pasture membrane appear rupture phenomenon, especially for low grass membrane thickness is more common, and the horizontal tensile rupture in the process of production for common, film is easily broken when high-speed transverse tensile, we generally divides into the horizontal tensile rupture in transverse rupture in longitudinal membrane and unclamping breaking film three types, the parsing for you three types of transverse tensile rupture in comes in.

There are many reasons for transverse membrane breakage, which can be divided into:

1, the raw material contains impurities (such as low molecular matter oil, etc.) with great performance difference;

2. There are obvious transverse stripes and bubbles on the casting plate;

3. Various non-obvious film breaking factors (longitudinal thickness fluctuation, etc.) further expand before transverse drawing, resulting in excessive local strain;

4. The deviation of the crystallization and orientation of the cast is too large;

5, filter damage, high content of impurities in the cast

6, the nose leakage

7, roll surface crush;

8, waste, equipment scratch film;

9. Improper setting of extrusion and longitudinal stretching temperature;

10. Volatiles collected on the top of the oven and the air duct fall onto the film;

11. The chain clip is damaged in the production process.