塑封膜有好幾種，PE\POF\PVC，膠帶是BOPP的，刷膠

PE：聚乙烯,它是由重復的–CH2–單元連接而成的。聚乙烯是通過乙烯( CH2=CH2 )的加成聚合而成的POF就是的意思，POF全稱多層共擠，它是將作為中間層（LLDPE），共（pp）作為內、外層，通過三臺塑化擠出，再經模頭成型、膜泡吹脹等特殊工藝加工而成的。POF表面光澤度高、韌性好、抗撕裂強度大、熱收縮均勻及適合全自動高速包裝等特點,是傳統PVC的換代產品。BOPP是“Biaxially Oriented Polypropylene”的縮寫，BOPP薄膜即雙向拉伸聚丙烯薄膜。

BOPP薄膜的生產是將高分子聚丙烯的熔體首先通過狹長機頭制成片材或厚膜，然后在專用的拉伸機內，在一定的溫度和設定的速度下，同時或分步在垂直的兩個方向（縱向、橫向）上進行的拉伸，并經過適當的冷卻或熱處理或特殊的加工（如電暈、涂覆等）制成的薄膜。

常用的BOPP薄膜包括：普通型雙向拉伸聚丙烯薄膜、熱封型雙向拉伸聚丙烯薄膜、香煙包裝膜、雙向拉伸聚丙烯珠光膜、雙向拉伸聚丙烯金屬化膜、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.