CPP is a polypropylene (PP) film produced by cast extrusion in the plastics industry. This type of film is different from BOPP (bidirectional polypropylene) film and is a non-oriented film. Strictly speaking, CPP films only have a certain orientation in the longitudinal (MD) direction, mainly due to the nature of the process. By rapid cooling on cold casting rollers, excellent clarity and finish are formed on the film.
Main Characteristics Of Cpp Film:
lower cost and higher output compared with other films such as LLDPE, LDPE, HDPE, PET, PVC; Higher stiffness than PE film; Excellent moisture and odor barrier; Multi-functional, can be used as a composite base film; Metallization is possible; As food and commodity packaging and outer packaging, it has excellent demonstration and can make the product still clearly visible under the packaging
At present, there is a wide range of products for CPP films. Only when enterprises continue to develop new products, open up new application fields, improve quality control capabilities, and truly realize product personalization and differentiation, can they be invincible in the market.
PP film is cast polypropylene, also known as unstretched polypropylene film, which can be divided into general CPP (GCPP) film, aluminized CPP (Metalize CPP, MCPP) film and Retort CPP (RCPP) film according to different uses.
CPP is a non-stretched, non-oriented flat-extruded film produced by melt cast quenching. Compared with blown film, it is characterized by fast production speed, high output, and good film transparency, gloss, and thickness uniformity. At the same time, because it is a flat extruded film, the follow-up processes such as printing and laminating are extremely convenient, so they are widely used in the packaging of textiles, flowers, food and daily necessities.
1.Laminated Rolls and Pouches
High transparency, high definition (less cellulite) for better window effect. It is used for transparent packaging such as clothing.
High slip, low migration, high corona retention, avoid the accumulation of precipitates in the post-processing process, extend the shelf life, used in sachet packaging, solvent-free composite film, etc.
Ultra-low temperature heat sealing, the initial heat sealing temperature is below 100°C, used in pharmaceutical packaging, high-speed packaging lines.
Functions Of Cpp Film In Flexible Packaging
5.Paper Towel Film
High stiffness, ultra-thin (17μ) roll film, due to the lack of stiffness after CPP thinning can not adapt to the high-speed tissue packaging line, most of the roll film is replaced by double-sided heat sealing BOPP, but BOPP heat sealing film also has the shortcomings of notch effect, easy tearing, and poor impact resistance
2.Aluminized film substrate
High stiffness, reduce the empty plating line, and improve the quality of aluminized products; High adhesion of aluminized layer, up to 2N/15mm or more, to meet the needs of large packaging.
Ultra-low temperature heat sealing to meet the requirements of high-speed automatic packaging.
Low coefficient of friction, improve opening, adapt to the requirements of high-speed bag making and packaging.
High surface wetting tension retention of the aluminium layer to extend the shelf life of aluminized CPP.
3,Retorting Film
High-temperature retort film (121-135°C, 30min), compounded with barrier films such as PET, PA, aluminum foil, etc., is used to package products that need high-temperature retort and sterilization, such as meat, pulp, agricultural products and medical supplies. The important performance indicators of CPP cooking film are heat sealing strength, impact strength, composite strength, etc., especially the maintenance of the above indicators after cooking. The stability of the quality of the high-temperature cooking film is the main factor restricting the use of downstream customers.
4.Audio-Visual Products And Album Films
High transparency, high definition, high gloss and abrasion resistance
6.Label Film And Tape Film
High stiffness, high surface wetting tension, easy die-cutting, can produce transparent, white, paper or other color films according to demand, mainly used for self-adhesive labels, products or aviation signs, adult, baby diapers left and right waist stickers, etc.;
7.Knot Film
Improve kink and stiffness, especially kink rebound after overcoming aluminum.
8.Antistatic film
CPP antistatic film can be divided into hygroscopic antistatic film and permanent antistatic film, which is suitable for the packaging of food and drug powder and various electronic components.
9.Anti-fog film
Long-lasting cold mist and hot mist protection effect, used for fresh fruits, vegetables, salads, edible mushrooms and other packaging, clearly see the contents when refrigerated, and prevent food from spoiling and rotting.
10.High Barrier Composite Film
Co-extrusion film: The high barrier film produced by co-extrusion of PP with good water blocking performance and PA, EVOH and other materials with oxygen barrier performance is widely used in meat frozen products and cooked meat food packaging; It has good oil resistance and organic solvent resistance, and can be widely used in the packaging of edible oil, convenience food, dairy products, and anti-rust hardware products; It has good water and moisture resistance, and can be used for liquid packaging such as wine and soy sauce; Coated film, which is coated with modified PVA, gives CPP high gas barrier properties.
11.Pe Extruded Composite Film
The CPP film produced by modification can be directly extruded with LDPE and other film materials, which not only ensures the fastness of the extrusion compound, but also reduces the cost of lamination.
Using PP as the adhesive layer and PE to co-extrude cast film with PP elastomer to form PP/PE or PE/PP/PE product structure, which can maintain the characteristics of high strength and good transparency of CPP, and use the characteristics of PE flexibility, low temperature resistance and low heat sealing temperature, which is conducive to thinning thickness and reducing the packaging cost of end customers, and is used for food packaging, tissue packaging and other purposes.
12. easy-to-open sealing film
Straight line easy tear film, CPP film produced by modified PP and special production process has straight line easy tear performance, and is combined with other materials to make a variety of straight line easy tear bags, which is convenient for consumers to use.
Easy peel film, divided into high temperature cooking and non-cooking two types, through the modification of the heat sealing layer PP to produce easy peel CPP film, and BOPP, BOPET, BOPA, aluminum foil and other packaging materials can be compounded into easy peel packaging, after heat sealing, it can be directly pulled from the heat sealing edge, which greatly facilitates the use of consumers.
13.Degradable Cpp Film
CPP degradation film made by adding photosensitizer or biodegradable masterbatch to PP can be basically degraded to inorganic matter and absorbed by soil under natural conditions for about 7 to 12 months, which improves the adaptability of plastic packaging to environmental protection.
14.Uv-Blocking Transparent Cpp Film
UV-blocking transparent CPP films produced by adding UV absorbers and antioxidants to CPP can be applied to the packaging of items containing photosensitive components, and have been used in Japan for the packaging of potato chips, deep-fried cakes, dairy products, sea vegetables, noodles, tea, and other commodities.
15.Antibacterial CPP film
Antibacterial CPP film is produced by adding antibacterial masterbatches with antibacterial, hygienic, environmentally friendly and stable stability, which are mainly used for fresh fruit and vegetable, meat food, and pharmaceutical packaging to prevent or inhibit the harm of microorganisms and extend the shelf life
Post time: Jun-20-2025
