塑封膜有好几种，PE\POF\PVC，胶带是BOPP的，刷胶

PE：聚乙烯,它是由重复的–CH2–单元连接而成的。聚乙烯是通过乙烯( CH2=CH2 )的加成聚合而成的POF就是的意思，POF全称多层共挤，它是将作为中间层（LLDPE），共（pp）作为内、外层，通过三台塑化挤出，再经模头成型、膜泡吹胀等特殊工艺加工而成的。POF表面光泽度高、韧性好、抗撕裂强度大、热收缩均匀及适合全自动高速包装等特点,是传统PVC的换代产品。BOPP是“Biaxially Oriented Polypropylene”的缩写，BOPP薄膜即双向拉伸聚丙烯薄膜。

BOPP薄膜的生产是将高分子聚丙烯的熔体首先通过狭长机头制成片材或厚膜，然后在专用的拉伸机内，在一定的温度和设定的速度下，同时或分步在垂直的两个方向（纵向、横向）上进行的拉伸，并经过适当的冷却或热处理或特殊的加工（如电晕、涂覆等）制成的薄膜。

常用的BOPP薄膜包括：普通型双向拉伸聚丙烯薄膜、热封型双向拉伸聚丙烯薄膜、香烟包装膜、双向拉伸聚丙烯珠光膜、双向拉伸聚丙烯金属化膜、消光膜等。

Plastic sealing film has several kinds, PE\POF\PVC, tape is BOPP, brush glue

PE: Polyethylene, which is composed of repeated -- CH2 -- units joined together. Polyethylene is by ethylene (CH2=CH2) addition polymerization of POF is the meaning, POF full name multi-layer co-extrusion, it will be as an intermediate layer (LLDPE), a total (pp) as the inner and outer layer, through three plasticized extrusion, and then through the die head molding, film bubble blowing and other special processes. POF surface gloss, toughness, tear strength, uniform thermal shrinkage and suitable for automatic high-speed packaging, is the replacement of traditional PVC products. BOPP is the abbreviation of "Biaxially Oriented Polypropylene". BOPP film is namely biaxially oriented polypropylene film.

BOPP film production is the polymer polypropylene melt first through the long and narrow head into sheet or thick film, and then in the special stretching machine, at a certain temperature and set speed, at the same time or step in the vertical two directions (vertical, horizontal) for stretching, And after appropriate cooling or heat treatment or special processing (such as corona, coating, etc.) made of film.

Commonly used BOPP films include: ordinary bidirectional stretching polypropylene film, heat seal bidirectional stretching polypropylene film, cigarette packaging film, bidirectional stretching polypropylene pearlized film, bidirectional stretching polypropylene metallized film, die film, etc.