| 检查热封层薄膜的保存期及保存条件 |
| 添加时间：2019/8/8 16:14:59 浏览次数： |
| 1.通过保温老化促进黏合剂硬化（熟化、固化），提高复合膜的复合强度及耐热性。 1. Heat preservation ageing can promote the hardening (curing and curing) of the binder and improve the composite strength and heat resistance of the composite film. 2.根据复合薄膜的构成结构、热封状态等选用最佳的热封条件（温度、时间和压力），或改进热封方式，热封后立即进行冷却。 2. Choose the best heat-sealing conditions (temperature, time and pressure) or improve the heat-sealing method according to the composition and heat-sealing state of the composite film, and then cool it immediately after heat-sealing. 3.检查热封层薄膜的保存期及保存条件，如果热封层使用的是旧批号的薄膜和经过热封处理的薄膜则要特别注意。 3. Check the shelf life and condition of the heat-sealing film. If the heat-sealing film is made of old batch and heat-sealed film, special attention should be paid. 4.增加热封层薄膜的厚度或者检查热封面的处理程度。 4. Increase the thickness of the thermal seal film or check the treatment degree of the thermal seal. 5.改变热封层薄膜的种类及品级，使用具有抗污染热封性的内封层薄膜。 5. Change the type and grade of the heat-sealing film, and use the anti-pollution heat-sealing film. 6.检查黏合剂的品级是否符合要求（树脂中低分子物质的渗出，有时会给黏合剂的组成成分带来影响）。 6. Check whether the grade of the adhesives meets the requirements (the exudation of low molecular weight substances in the resin sometimes affects the composition of the adhesives). 7.改善热封层（基材）的热合性能，控制好爽滑剂的含量，采用MLLDPE薄膜。 7. To improve the thermal sealing performance of the heat sealing layer (substrate) and control the content of smoothing agent, MLLDPE film was used. 8.控制好复合胶黏合剂中MDI的单体含量。 8. Control the monomer content of MDI in composite adhesives. 9.更换油墨（最好采用两液型油墨）。 9. Replace ink (preferably two-liquid ink). 10.改变包装袋的印刷图样，使印有油墨的部分避开热封部位，或改变热封方法（特别注意金属油墨不要印在封口处）。 10. Change the printing pattern of packaging bags, so that the ink Part avoids the heat-sealing part, or change the heat-sealing method (pay special attention to metal ink not to be printed on the sealing part). |
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