CN115958861A - BOPP film with high composite strength - Google Patents

Abstract

The invention discloses a BOPP film with high composite strength, which is characterized in that: the BOPP film is of a three-layer structure and sequentially comprises a non-corona layer (1), a middle layer (2) and a corona layer (3) from bottom to top, wherein the non-corona layer (1) comprises 90-95% of homopolymerized polypropylene and 0.5-10% of anti-blocking agent, the middle layer (2) comprises 90-99.5% of homopolymerized polypropylene and 0.5-10% of antistatic agent, and the corona layer (3) comprises 80-99% of copolymerized polypropylene, 0.5-10% of acid modified adhesive resin and 0.5-10% of silica anti-blocking agent.

Description

A BOPP film with high composite strength

technical field

The invention relates to the field of printing, in particular to a BOPP film with high composite strength.

Background technique

BOPP is the abbreviation of "Biaxially Oriented Polypropylene", that is, biaxially oriented polypropylene film. The production process of BOPP film is to make the melt of high molecular polypropylene through a long and narrow machine head to make a sheet or a thick film, and then in a special stretching machine, at a certain temperature and a set speed, simultaneously or separately A film made by stretching in two vertical directions (longitudinal and transverse) and undergoing appropriate cooling or heat treatment or special processing (such as corona, coating, etc.).

The composite strength of the traditional BOPP film is relatively low, and for some special products, the BOPP film is required to have a high composite strength between the films. The traditional BOPP film cannot meet the above requirements, so now a kind of film that can solve the above problems is needed. New type of film.

Contents of the invention

The present invention aims to solve the above technical problems, and proposes a high-composite-strength BOPP film that can meet the special requirements of color printing factories for composite strength.

The technical solution of the present invention is: a BOPP film with high composite strength, characterized in that: the BOPP film has a three-layer structure, which is a non-corona layer 1, an intermediate layer 2 and a corona layer from bottom to top. 3,

The non-corona layer 1 contains 90-95% homopolypropylene and 0.5-10% anti-blocking agent,

The middle layer 2 contains 90-99.5% homopolypropylene and 0.5-10% antistatic agent,

The corona layer 3 contains 80-99% of copolymerized polypropylene, 0.5-10% of acid-modified adhesive resin and 0.5-10% of silica-based antiblocking agent.

Compared with the prior art, the present invention has the following advantages:

The high composite strength BOPP film of this kind of structure has simple structure, ingenious design and reasonable layout. properties, and use the co-polypropylene resin material with stronger polarity after corona treatment to replace the homo-polypropylene resin, and use silica-based anti-adhesive agent to increase the surface roughness, which can effectively improve the overall composite of BOPP film Strength to meet the requirements of some products for composite strength.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed ways

The specific implementation manner of the present invention will be described below with reference to the accompanying drawings. As shown in Figure 1: a high composite strength BOPP film, the film is a three-layer structure, which is followed by a non-corona layer 1, an intermediate layer 2 and a corona layer 3 from bottom to top,

The non-corona layer 1 contains 90-95% homopolypropylene and 0.5-10% anti-blocking agent,

The middle layer 2 contains 90-99.5% homopolypropylene and 0.5-10% antistatic agent,

The corona layer 3 contains 80-99% of copolymerized polypropylene, 0.5-10% of acid-modified adhesive resin and 0.5-10% of silica-based antiblocking agent.

It improves the surface polarity by adding an acid-modified adhesive resin based on copolymerized PP to the corona layer, and uses a copolymerized polypropylene resin material with stronger polarity after corona treatment to replace the homopolymerized polypropylene resin material. Polypropylene resin and silica-based anti-adhesive agent are used to increase the surface roughness, which can effectively improve the overall composite strength of BOPP film.

Claims (1)

1. A BOPP film with high composite strength, characterized in that: the BOPP film is a three-layer structure, which is followed by a non-corona layer (1), an intermediate layer (2) and a corona layer (3) from bottom to top. ), The non-corona layer (1) contains 90-95% homopolypropylene and 0.5-10% anti-blocking agent, The middle layer (2) contains 90-99.5% homopolypropylene and 0.5-10% antistatic agent, The corona layer (3) contains 80-99% of copolymerized polypropylene, 0.5-10% of acid-modified adhesive resin and 0.5-10% of silica-based antiblocking agent.

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