热封强度差指封口位置的强度低于标准要求
Heat Seal Strength Difference refers to the strength of the sealing position below the standard requirement.
1、产生原因
1. Causes
①复合膜中的黏合剂尚未充分硬化。
(1) The binder in the composite film has not yet been fully hardened.
②热封条件不适当。
(2) The heat sealing condition is not suitable.
③热封刀和冷却刀之间的距离过长。
The distance between heat sealing knife and cooling knife is too long.
④内封层薄膜有问题。
(4) There is a problem with the inner sealing film.
⑤油墨的耐热封性不良，导致热封部位薄膜的复合强度降低。
The poor heat sealing property of ink results in the decrease of the composite strength of the film at the heat sealing part.
⑥粉尘、喷粉等物质附着于热封面上。
Dust, powder spraying and other substances adhere to the thermal cover.
⑦复合强度低下或热封处复合强度下降过多。
The composite strength is low or the composite strength at the heat seal decreases too much.