Give Your Products a New Look : Plastic Packaging Bag Production Process and Customization Recommendations

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    Many businesses, when upgrading their product packaging bags, want to understand if the production craft and materials of plastic packaging bags can meet their needs. Kalead Pack combines our rich industry experience to provide you with detailed basic knowledge. Let’s see if you’ve missed anything about your pouches or bags.

    I. Production Process

    Design

    Choose the appropriate size and shape pouches that suit your product, while meeting your packaging needs. Consider the dimensions, weight, and shelf presence of your product.

    Use colors, images, logos, and typography to create your brand identity. Ensure that your design is visually appealing and conveys important information about your product.

    Printing

    Gravure Printing: This involves transferring text and images from an original manuscript onto a printing plate, applying ink on the surface of the plate, and using pressure to transfer the graphics to the surface of the printed material, accurately reproducing the print in large quantities as per the original. This can involve surface printing or reverse printing.

    Lamination

    The basic principle of plastic lamination in flexible packaging: Each material has different advantages and disadvantages, and they are bonded together using a medium (such as glue) to give the packaging film or bag better performance. In production, this technique is known as the "lamination process."

    Curing

    The purpose of curing is to accelerate the speed of glue curing between materials.

    Slitting

    We slit the printed and laminated material into the specifications required by the customer.

    Pouch Bag Making

    Form bags of various styles from the printed, laminated, and slit materials to meet customers' needs. Bags can be made in multiple types: center seal, side seal, stand up pouch, flat bottom pouch, spout bag, three/four side seal bag, zipper bag.

    Quality Control

    • Testing before raw material storage
    • Online product testing
    • Print inspection—residual solvent, registration, etc.
    • Lamination inspection—lamination strength, bubbles, wrinkles, etc.
    • Bag making inspection—seal strength, size deviation, etc.
    • Pre-shipment product inspection
    Produce Process Of Plastic Packaging Bag - KanzoPack

    II. Understanding Common Printing Materials

    BOPP

    Biaxially Oriented Polypropylene is a film made by stretching in two directions. It is often used for printing and excels at keeping moisture out. This makes it great for products like biscuits, dried fruit, and sunflower seeds that need to stay dry.

    KOP

    Coated Biaxially Oriented Polypropylene with a thin layer (around 1-2um) of Polyvinylidene Chloride (PVDC, also called K coating). KOP has the properties of OPP as well as the advantages of PVDC. Cookies commonly use it for food products that require oxygen and moisture barriers. KOP has a barrier function similar to aluminum foil but is transparent, allowing visibility of the content.

    PCO

    Polypropylene Heat Sealable Film which has the properties of OPP along with heat sealability on both sides; often used for CD sleeves and seaweed packaging.

    PL

    Polypropylene resin is mixed with pearl powder and then subjected to bidirectional stretching to make Biaxially Oriented Polypropylene Pearlized Film. Used for packaging cosmetics, soap, labels, etc.

    PET

    Polyester Film - Similar to OPP, it is a biaxially oriented film, either stretched in two stages—longitudinally and laterally—or simultaneously, and then heat-set. Frequently utilized as a print medium for machinery packaging rolls, heat-resistant cooking pouches, ziplock bags, and so on.

    KPET

    Coated Polyester Film, PET with a thin PVDC coating. Hence, KPET has the performance of PET plus the advantages of PVDC. Foods that require oxygen and moisture barriers commonly use it. Like KOP, it has a barrier function similar to aluminum foil yet is transparent to display the packed contents. Its excellent high-temperature resistance makes it better suited for machine packaging and other high-temperature-resistant bag types.

    NY

    Nylon, used for vacuum packaging, frozen foods, high-temperature cooking food packaging; common thickness is 15um. Because of its thinness, it is extremely crinkly; density is 1.15g/cm³.

    PVC

    Polyvinyl Chloride, generally used for bottle labels, it is a single-layer material that doesn't require lamination post-printing and can be adhered with PVC glue (ratio of alcohol and cyclohexanone 1:1); common thickness: 40um.

    Matte-opp

    Biaxially Oriented Polypropylene Matte Film, used for packaging puffed foods, mooncakes, tissues, cosmetics, etc.

    CPP

    Cast Polypropylene, different from stretched OPP, CPP is solidified during cooling post-film formation and is the most commonly used heat-seal material. As a printing material, it's often used for tissue packaging; as composite material, when combined with other materials, it serves as a heat-seal layer.

    PE

    Polyethylene is a thermoplastic resin derived from ethylene polymerization, comes in various forms including high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and ultra-high-molecular-weight polyethylene (UHMWPE), categorized by the polymerization technique and molecular weight.

    Are you interested in learning more about KanzoPack’s films and packaging products? Look no further than our glossary webpage! Here you’ll find a wealth of knowledge about all things related to our products and their specifications.

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