Overview of BOPP Films

BOPP film has the advantages of light weight, non-toxic, odorless, moisture-proof, high mechanical strength, stable size, good printing performance, high air tightness, good transparency, reasonable price and low pollution, and is known as the "queen of packaging". The application of BOPP film reduces the use of paper packaging in society and strengthens the protection of forest resources.

The birth of BOPP film has rapidly driven the transformation of the packaging material industry, and has begun to be widely used in the packaging of food, medicine, daily necessities, etc. With the accumulation of technical foundation, in recent years, BOPP film has been endowed with electrical, magnetic, optical, high temperature resistance, low temperature resistance, barrier, modified atmosphere, antibacterial and other functions on the basis of packaging functions, and functional BOPP films are more and more used in electronics, medical, construction and other industries.

1. Plastic film

Comparison of plastic film application fields, taking CPP, BOPP and ordinary PP film as examples.

CPP: The product has the characteristics of transparency, softness, barrier and mechanical adaptability, high temperature cooking resistance (cooking temperature above 120 °C) and low temperature heat sealing (heat sealing temperature less than 125 °C). It is mainly used as the inner substrate of composite packaging such as food, candy, native products, cooked food (can be applied to sterilization packaging), frozen products, condiments, soups, etc., which can extend the shelf life of food and increase aesthetics. It can also be used for the surface and compartment of stationery products, and can also be used as auxiliary films, such as loose sheets and labels for photos and collectibles.

BOPP: It has excellent printing performance, can be combined with paper, PET and other substrates, has high clarity and gloss, excellent ink absorption and coating adhesion, high tensile strength, excellent grease barrier properties, low static characteristics, etc. It is widely used in the field of printing and composite, and is also used as a packaging material in tobacco and other fields.

Blown film IPP: due to the simple process and low cost, but the optical performance is slightly lower than CPP and BOPP. It is mainly used for the outer packaging of snacks, bread, textiles, folders, record cases, sneakers, etc.

Among them, BOPP and CPP have improved composite performance and are more widely used, and have moisture-proof, transparent and crisp properties after compounding, which can be used for the packaging of dry foods such as peanuts, fast food, chocolate, pastries, etc. In recent years, the types and types of plastic films in China have gradually increased, and each has its own strengths, with the continuous improvement of technology, packaging film has broad prospects.

2. Relevant knowledge of common BOPP films

Optical film: BOPP ordinary film, also known as optical film, is the most used product among BOPP products. The light film itself is a waterproof plastic film, and the surface of the label material that is not waterproof can be made waterproof through the light film. The light film makes the surface of the label sticker more bright, more high-end, and attracts attention; The light film can protect the printed ink/content, making the label surface scratch-resistant and more durable. Therefore, light film is widely used in all kinds of printing, food, and article packaging.

Features: The light film has the characteristics of waterproof; The light film makes the surface of the label shiny; The light film can protect the printed content.

Usage: Printed materials; Packaging of food and goods.

3. Advantages of BOPP film

BOPP film, i.e. biaxially oriented polypropylene film, refers to a film product prepared with polymer polypropylene as raw material through stretching, cooling, heat treatment, coating and other links. According to different properties, BOPP film can be divided into ordinary BOPP film and functional BOPP film; According to different uses, BOPP film can be divided into cigarette packaging film, metallization film, pearlescent film, matting film, etc.

Advantage:

BOPP film is colorless, odorless, non-toxic, and has the advantages of high tensile strength, impact strength, rigidity, toughness and good transparency. BOPP film needs to be corona treated before gluing or printing. After corona treatment, BOPP film has good printing adaptability, and can be printed with color to obtain exquisite appearance effect, so it is often used as the surface material of composite film.