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塑料袋在吹膜过程中注意的三个事项!

发布日期:2019-11-26 作者:www.jnsuliao.com 点击:

  塑料袋被广泛应用于百货商店和街角的商店。胶袋在吹膜过程中的关键控制点是:温度、主机转速、牵引比和吹膜比,今天济南胶袋厂家为您精心介绍一下胶袋在吹膜过程中的注意事项,希望对您有所帮助!
  Plastic bags are widely used in department stores and corner stores. The key control points of the plastic bag in the film blowing process are: temperature, rotation speed of the main machine, traction ratio and film blowing ratio. Today, Jinan plastic bag manufacturer carefully introduces the precautions in the film blowing process for you, hoping to help you!
  1. 挤出机温度
  1. Extruder temperature
  吹塑低密度聚乙烯时,挤出温度一般控制在160℃~ 170℃之间,必须保证机头的平均温度。
  When blow molding LDPE, the extrusion temperature is generally controlled between 160 ℃ and 170 ℃, and the average temperature of the die head must be ensured.
  挤出温度高:树脂易合成,膜脆,特别是纵向抗拉强度明显下降。
  High extrusion temperature: the resin is easy to synthesize and the film is brittle, especially the longitudinal tensile strength is obviously reduced.
  挤出温度过低:树脂塑化不佳,薄膜的抗拉强度较低,且外观光泽度和透明度较低,因木纹状而使原子核熔化
  Low extrusion temperature: poor plasticization of resin, low tensile strength of film, low appearance gloss and transparency, melting of atomic nucleus due to wood grain
  2、塑料袋吹制比
  2. Blowing ratio of plastic bags
  吹膜比是吹膜过程中的一个环节,它控制着吹膜的宽度和厚度,同时也控制着根的数量和拉伸比。
  Film blowing ratio is a link in the process of film blowing. It controls the width and thickness of film blowing, as well as the number and tensile ratio of roots.
塑料袋在吹膜过程中注意的三个事项!
  同时吹制比的大小也影响薄膜的横向抗拉强度和薄膜厚度的平均值。吹胀比可以提高膜的横向强度,但也不能太大,否则容易形成膜泡不稳定,而且膜很容易折叠,同时膜的厚度也会显示不均匀。一般情况下,将LDPE吹膜比控制在2.5-3.0比较合适
  At the same time, the blowing ratio also affects the transverse tensile strength and the average thickness of the film. The expansion ratio can improve the transverse strength of the film, but it should not be too large, otherwise it is easy to form the film bubble instability, and the film is easy to fold, at the same time, the thickness of the film will show uneven. In general, it is suitable to control the film blowing ratio of LDPE at 2.5-3.0
  3.牵引比
  3. traction ratio
  牵引力比是指膜的牵引力速度与管环的挤出速度之比。牵引比增加,然后纵向强度也会进步,和薄膜厚度变薄,但如果牵引比太大,膜的厚度难以控制,因此可能会让这部电影打破,形成段电影现象,比普通聚乙烯薄膜牵引控制在4 - 6之间为宜。
  Traction ratio refers to the ratio of the traction speed of the membrane to the extrusion speed of the pipe ring. If the traction ratio increases, then the longitudinal strength will also improve, and the film thickness becomes thinner, but if the traction ratio is too large, the film thickness is difficult to control, so this film may be broken, forming a segment film phenomenon, which is better than that of ordinary polyethylene film traction control between 4 - 6.