Detailed basic introduction to BOPP

The production of BOPP film is to first pass the melt of polymer polypropylene into sheets or thick films through a long and narrow machine head, and then in a special stretching machine, at a certain temperature and set speed, simultaneously or distributed in A film made by stretching in two vertical directions (longitudinal and transverse directions) and undergoing appropriate cooling or heat treatment or special processing (such as corona, coating, etc.).

BOPP classification and application can be divided into:

Ordinary type: also known as light film and flat mold. Used for printing, lamination (transparency, matte type), coating (adhesive tape and PVDC coated base film). It is the most widely used and produced variety among film products: printing film, composite film, tape film, bag making film, matting film, etc., are all flat films.

Heat sealing type: used for ordinary packaging, such as cigarette packaging film, three-layer heat sealing film, five-layer gas barrier film, pearlescent film, coated heat sealing film, etc.heat sealing film, laser film, are heat sealing films.

Label film: used for product labels, advertising printing, written magazines, bottle labels and overall packaging, etc.: Metallized film: used for vacuum aluminum plating: Capacitor film: used for capacitors and metal capacitors.

Membrane type breakdown:

Ordinary film BOP Qiongtong film, also known as light film, is suitable for food packaging, paper lamination and general packaging printing lamination. It is the most widely used product among BOPP products. Flat film, also known as light film, is one of the most common films in the biaxially oriented polypropylene film (BOPP film) series products. It is widely used in various types of printing and composite products for packaging of various foods and articles. . Among them, 15dm thick flat film is mainly used for lamination of books and other paper.

In the consumption of optical film, plastic bag film accounts for a large proportion, and a considerable number of film factories use tape film as their main product. The production of tape film has several characteristics: large output, simple process, and low technical requirements.

Although the overall usage of smoke film and matt film is not large, it is the most profitable product among BOPP films. The characteristics of tobacco film production and sales include high technical requirements and high entry costs.

Matte (matte)

Membrane matting film is a plastic matting product with low gloss (glossiness less than 15), high haze and diffuse reflection matting effect. It has a paper-like appearance and color when printing.

Features include realistic reproduction and comfortable hand feel. Matt film is a film made of two-way stretching using matt masterbatch on a single surface layer. The surface of matt film looks like paper and natural products. It is mainly used for laminating books, prison sentences, annual report covers, cardboard and other papers. It is also used with polyethylene film, cast polypropylene film, BOP film, etc. Pearlescent film, metallized film, etc. are compounded and used in various packaging. The current thickness of matt film is generally 20dm.

Left and right O heat sealing film

Heat sealing film is divided into two types: single-sided heat sealing film and bidirectional heat sealing film. It is a polypropylene heat sealing film (BOP drop sealing film) made of heat sealing masterbatch on the surface and stretched in two directions. It is mainly used in food experience. It is used for heat seal packaging of products such as medicines, medicines and other electrical components. It is divided into two types: single-sided heat sealing and double-sided heat sealing. Single-sided heat sealing film is used for general-purpose single-sided heat sealing packaging, which is cheap and printable. Mainly used for pearlescent film in lamination, printing, bag making, etc.

The white opaque BOPP pearlescent film has a satin-like texture, soft and pleasant pearl luster, low density, excellent flatness and gas barrier properties. It can be widely used in the direct packaging of dried fruits, ice cream, candies, high-end soaps, gifts, etc. At the same time, it is also a better printing base.

There is no need to carry out full-page priming when printing on the surface. Therefore, BOPP pearlescent film is very popular. Compared with ordinary BOPP film, BOPP pearlescent film has three typical characteristics: emitting pearlescent luster and good light-shielding properties, (especially Obvious UV light blocking) and lower density. In particular, the first two characteristics show the uniqueness of BOPP pearlescent film, allowing it to enter the high-end market in the packaging field and bring considerable economic benefits to manufacturers.

Electrical film BOPP electrical film has very high technical requirements, and the thickness requirement is 20-31%. With the miniaturization and high performance of components, more and more films below 6l^m are used. In addition to the film thickness reduction, , also requires high dielectric strength, high windability, good thickness uniformity, etc., which places special requirements on the production process, and has higher requirements on equipment technology, process technology and production operators. At the same time, It also requires very mature experience. Therefore, the production of this material is an area with high technical content and large capital investment. To produce stable and consistent qualified BOPP electrical membrane products, there are greater technical risks and market risks.

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