CPPThe composition, characteristics and use of packaging bags

January 31, 2023

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Among many packages, we most often use plastic packaging. The ease of use of plastic and its ability to adapt to various environments are much higher than other materials, such as extensibility, plasticity, recyclability, etc., and I will explain it to you today. aboutcppThe properties of this material are often used.CPPcast polypropylene filmcast polypropylene, also known as unstretched polypropylene film, used in various packaging bags, can be divided into general-purpose according to different usesCPPThin film, aluminized gradeCPPFilm and Retort GradeCPP (Retort CPP, referred to asRCPP)film etc.CPPIt is a polypropylene produced by tape extrusion in the plastics industry(PP)film. Such films andBOPP(Two-way polypropylene)The film is different and is a non-oriented film. Strictly speaking,CPPfilm only in longitudinal direction(MD)There is a certain orientation in the direction, mainly due to the nature of the process. Excellent clarity and finish is formed on the film by rapid cooling on chilled rolls.CPPThe primary properties of the film include:andLLDPE,LDPE,HDPE,PET,PVGCompared with other films, the cost is lower and the output value is higher: thanPEHigher film stiffness: excellent moisture and odor barrier properties: multi-functional, can be used as composite material base film:-Can be metallized: As food and commodity packaging and outer packaging, it has excellent presentation, allowing the products to be clearly visible under the packaging.CPPThe film is printed, bagged and suitable for:1,(Composite film)Clothing, knitwear and floral bags;Document and Album Films;food packaging.2,(Aluminum coating)Metallized films for barrier packaging and decoration. After vacuum aluminum plating, it can be used withBOPP,BOPAIt is used for high-end packaging of tea, fried crispy food, biscuits, etc. by compounding with other substrates.3,(cooking film)CPPExcellent heat resistance. becausePPThe softening point is about140℃, this type of film can be used in hot filling, retort pouches, aseptic packaging and other fields. In addition, it has excellent acid resistance, alkali resistance and grease resistance, making it the first choice material for bread product packaging or laminated materials. It is safe in contact with food, has excellent demonstration performance, will not affect the flavor of the food inside, and can choose different grades of resin to obtain the required properties.4,(Functional film, also called special film)Potential uses also include: food packaging, candy packaging(conjunctiva),Pharmaceutical Packaging(Infusion bags), replacing in categories such as albums, folders, and filespvc, Synthetic paper, self-adhesive tape, business card holder, ring folder and stand-up bag composite materials.5,CPPnew usage markets such asDVDAnd video box packaging, bakery packaging, vegetable and fruit anti-fog film and flower packaging, and synthetic paper for labels.

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