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食品袋与普通塑料袋有什么区别?

发布日期:2020-04-14 作者:www.accesserp.cn 点击:

  常见的食品包装材料有聚乙烯、聚丙烯、聚苯乙烯等。不同的材料有不同的特点,使用时应根据食物本身的特点来选择。
  Common food packaging materials include polyethylene, polypropylene, polystyrene, etc. Different materials have different characteristics, which should be selected according to the characteristics of the food itself.
  (一)PE聚乙烯:主要成份为聚乙烯树脂,加入少量润滑剂、抗老化剂等添加剂。聚乙烯没有气味,无毒,外露在乳白色的蜡状固体中。聚乙烯按聚合方法、分子量和链结构分为高密度聚乙烯、低密度聚乙烯和线性低密度聚乙烯。
  (1) PE polyethylene: the main component is polyethylene resin, adding a small amount of lubricant, anti-aging agent and other additives. Polyethylene is odorless, nontoxic, and exposed to a milky white waxy solid. According to polymerization method, molecular weight and chain structure, polyethylene can be divided into high-density polyethylene, low-density polyethylene and linear low-density polyethylene.
  低密度聚乙烯:俗称高压聚乙烯,由于密度低,材料是更软的,主要用于塑料袋、食品、服装、医药、化肥、工业产品包装材料和农用薄膜。
  Low density polyethylene: commonly known as high-pressure polyethylene, because of its low density, the material is the softest, mainly used for plastic bags, food, clothing, medicine, fertilizer, industrial product packaging materials and agricultural film.
  高密度聚乙烯,俗称低压聚乙烯,与LDPE和LLDPE相比,具有较高的耐热性,耐油性,蒸汽渗透性和耐环境应力开裂性能,电气绝缘和耐冲击和耐冷性能很好,主要应用于空心产品的生产(如牛奶瓶、洗涤剂瓶)和吹塑、注塑、等领域。
  High density polyethylene, commonly known as low-pressure polyethylene, has higher heat resistance, oil resistance, steam permeability and environmental stress cracking resistance compared with LDPE and LLDPE. Its electrical insulation, impact resistance and cold resistance are very good. It is mainly used in the production of hollow products (such as milk bottles, detergent bottles), blow molding, injection molding and other fields.
  线性低密度聚乙烯(ldpe)是乙烯与少量高烯烃在催化剂存在下的共聚物。LLDPE与LDPE外观相似,透明度差,但表面光泽度好。具有低温韧性、高模量、抗弯、抗应力开裂、低温冲击强度好等优点。
  Linear low density polyethylene (LDPE) is a copolymer of ethylene and a small amount of high olefins in the presence of catalyst. LLDPE and LDPE have similar appearance, poor transparency, but good surface gloss. It has the advantages of low temperature toughness, high modulus, bending resistance, stress cracking resistance, and low temperature impact strength.
  主要用于生产薄膜、日用品、管材、电线电缆的注塑、挤出、吹塑等成型方法。
  Mainly used in the production of film, commodity, pipe, wire and cable injection, extrusion, blow molding and other molding methods.
  (2)聚丙烯:主要成分是聚丙烯树脂,高光泽,透明度高,热封性比聚乙烯差,但比其他塑料材料好。
  (2) Polypropylene: the main component is polypropylene resin, high gloss, high transparency, poor heat sealing performance than polyethylene, but better than other plastic materials.
  1. 阻隔性能优于PE,强度、硬度、刚性高于PE;
  1. The barrier performance is better than PE, and the strength, hardness and rigidity are higher than PE;
  2. 健康安全高于体育
  2. Health and safety are higher than sports
  3.优异的耐高温性能,可在100~200℃的温度下长期使用,但耐低温性能比PE差,当达到-17℃时性能变脆。
  3. Excellent high temperature resistance, which can be used for a long time at the temperature of 100 ~ 200 ℃, but its low temperature resistance is worse than that of PE, and it becomes brittle when it reaches - 17 ℃.
  聚丙烯主要由薄膜材料制成的食品包装袋,耐水性、防潮性比PT好,材料透明,耐撕裂,但印刷性比PT差,成本低,可用于糖果、零食的扭结包装。也可制成热缩膜,用于食品热缩包装,如食品真空包装袋等复合包装袋。
  Polypropylene is mainly made of film material for food packaging. Its water resistance and moisture resistance are better than Pt. Its material is transparent and tear resistant, but its printability is worse than Pt and its cost is lower. It can be used for kinking packaging of candy and snacks. It can also be made into heat shrinkable film and used in food heat shrinkable packaging, such as food vacuum packaging bag and other composite packaging bags.
济南塑料袋
  (3)聚苯乙烯:以苯乙烯单体为主要成分的聚合物。材料透明,光泽好。
  (3) Polystyrene: polymer with styrene monomer as main component. The material is transparent and glossy.
  1. 耐湿性比聚乙烯差,化学稳定性一般,硬度高,但脆性大。
  1. The resistance to humidity is worse than that of polyethylene, the chemical stability is general, the hardness is high, but the brittleness is large.
  2. 耐低温性好,耐高温性差,不高于60~80℃。
  2. Good low temperature resistance, poor high temperature resistance, no higher than 60 ~ 80 ℃.
  3.良好的安全系数。
  3. Good safety factor.
  主要由食品盒、水果盘、餐具、冷饮杯等组成。
  It mainly consists of food box, fruit plate, tableware, cold drink cup, etc.
  除了常见的食品包装材料PE、PE、PS、PP聚丙烯聚苯乙烯、三聚氰胺等不同类型的塑料复合膜、多层,如复合薄膜复合材料制成的复合袋、等,这些材料根据不同的特点和不同的处理技术可以产生不同类型的包,如大米自立拉链袋、真空袋、狗粮等调味品塑料袋,袋泡茶。
  In addition to the common food packaging materials such as PE, PE, PS, PP, PP, polystyrene, melamine and other different types of plastic composite films, multilayer, such as composite bags made of composite film composite materials, etc., these materials can produce different types of bags according to different characteristics and different processing technologies, such as rice self-supporting zipper bags, vacuum bags, dog food and other condiment plastic bags, tea bags.
  彩色塑料袋一般是用在制造着色剂的过程中,着色剂通常含有苯并芘,苯并芘是一种多环芳烃,多环芳烃会对人体健康造成很多危害。
  Color plastic bags are generally used in the process of making colorants. The colorants usually contain benzopyrene, which is a kind of polycyclic aromatic hydrocarbon, which will cause a lot of harm to human health.


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