The design and production process of custom PVC bags
Customized PVC bags need to be combined with design, material selection, production process and quality inspection and other links to ensure that the products meet functional requirements and safety standards. The following is the specific process:
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First, the design stage
Clarify the requirements
Purpose: Determine the packaging object (such as food, industrial products, gifts, etc.), and clarify requirements such as size, thickness, and load-bearing capacity.
Design elements: Provide design materials such as logos, patterns, and text, or entrust the manufacturer to design for free.
Special requirements: Whether it is necessary to add functional designs such as zippers, handle holes, and ventilation holes.
Material selection
PVC material: Choose PVC films of different thicknesses and properties according to the application, such as transparent PVC, laser PVC, etc.
Environmental protection considerations: If used for food packaging, it is necessary to ensure that the materials comply with food safety standards (such as GB 9681-1988).
Design confirmation
The manufacturer makes design drawings according to the requirements and finalizes them after confirmation by the customer.
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Second, the production stage
Raw material preparation
Mix PVC particles with additives (such as plasticizers, stabilizers) in proportion to ensure the stability of material performance.
Forming processing
Blown film/cast film: The mixture is heated and melted, and then extruded into a film through a blown film machine or cast film machine.
Cooling and shaping: The film is cooled and shaped by cooling rollers to ensure uniform thickness.
Printing processing
The design patterns and text are printed onto the film surface by using screen printing or gravure printing technology.
Ink selection: Use environmentally friendly ink to prevent the migration of harmful substances.
Bag-making processing
Cutting: Cut the film into sheet materials according to the designed dimensions.
Sealing: The sheet materials are sealed into bags through high-frequency hot pressing or ultrasonic sealing technology.
Function addition: Install accessories such as zippers and handle holes (if necessary).
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Third, quality inspection
Visual inspection
Check the transparency of the bag body, the clarity of the printing, the firmness of the sealing, etc.
Performance test
Load-bearing capacity test: Test the maximum load-bearing capacity of the bag.
Sealing test: Ensure there is no leakage at the seal.
Drop test: Simulate the impact during transportation to check if the bag is damaged.
Safety inspection
Plasticizer migration test: Ensure that the plasticizer content complies with national standards (for example, in food packaging, it should be less than 1mg/kg).
Heavy metal detection: Detect the content of heavy metals such as lead and cadmium to ensure they are non-toxic.
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Fourth, packaging and shipment
Packaging
Classify and pack the finished PVC bags, attach labels and indicate information such as specifications, quantities and production dates.
Shipment
Arrange logistics and distribution according to customer requirements to ensure on-time delivery.
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Fifth, Precautions
Environmental protection compliance
Avoid using ultra-thin PVC bags (thickness <0.025mm) to reduce white pollution.
Encourage the use of degradable materials or recycled PVC films to reduce environmental impact.
Safe use
Food packaging: PVC bags must not come into direct contact with high-fat foods or be used for microwave heating.
Child safety: Keep children away from PVC bags to prevent the risk of accidental ingestion or suffocation.
Cost and Budget
The cost should be reasonably controlled based on factors such as design complexity, material thickness and printing process.
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Sixth, sample process
Customer order: Provide information such as design requirements, quantity, and delivery time.
Manufacturer design: Produce renderings and finalize the design after customer confirmation.
Raw material preparation: Purchase PVC particles, additives and other raw materials.
Production and processing: blown film, printing, bag making, quality inspection.
Packaging and shipment: Sort and pack into boxes, and arrange for logistics and distribution.
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Through the above process, PVC bags that meet the requirements can be customized, taking into account both functionality and safety.
We Committ To Serve All Kinds Of PVC/ EVA Bags, Cosmetic Bags, Canvas Bags And Paper Bags With Custom Service!
Shanghai Chenhuan Industrial is a manufacturer which is specialized in the research, development and production of all kinds of bags and packaging. Our products include PVC bags, EVA bags, TPU bags, PE bags, paper bags, cosmetic bags, canvas bags and tote bags. We provide OEM service to the material, the size, the style and the printing.Official website Address:https://www.chenhuanind.com/
