Plastic color-printed composite packaging manufacturer and plastic flexible packaging solutions
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2021
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Composite Packaging Bags: How Composite Packaging Bags Are Produced and Manufactured, Packaging Bag Manufacturer
Composite packaging bags are formed by combining two or more materials through one or multiple lamination processes, resulting in a multi‑layer structure that delivers specific functional properties. They typically consist of a base layer, a functional layer, and a heat‑seal layer. Next, Platinum Packaging Technology will explain the production process of composite packaging bags.
Composite packaging bag It is a composite package formed by combining two or more materials through one or multiple lamination processes, thereby achieving specific functional properties. Typically, it consists of a base layer, a functional layer, and a heat-seal layer. Next, Baijin Packaging Technology will explain how composite packaging bags are manufactured.
Most composite packaging bags are manufactured using a dry lamination process, producing… Composite packaging bag At this stage, the adhesive‑coated substrate is unwound from the unwind unit and fed into the coating unit. The adhesive on the surface of the coating roller is scraped off by a doctor blade, and the adhesive within the coating cells is transferred to the substrate surface when the substrate is pressed against the roller. The coated substrate then enters the oven, where the solvent in the adhesive evaporates under heating and air‑blowing conditions. After exiting the oven, it is laminated with another substrate supplied by a separate unwind unit within a heated, pressurized laminating nip, forming a single composite web. Following cooling and shaping, the composite film is wound up by the rewind unit into a roll.
The curing process in composite packaging bag production is the stage during which the main component and the curing agent within the composite film undergo a chemical reaction. According to the packaging bag manufacturer, newly laminated composites cannot proceed to subsequent processing steps because the adhesive layer has not yet cured and set. Only after the curing process is completed—allowing the adhesive layer to fully cure and stabilize—can the material move on to the next stage. Packaging bag manufacturer Note that curing is categorized into ambient‑temperature curing and heat‑curing. Ambient‑temperature curing refers to the reaction between the main component and the curing agent occurring at room temperature, whereas heat‑curing involves this reaction taking place at a specified temperature. Heat‑curing accelerates the reaction rate between the main component and the curing agent, thereby shortening the production cycle.
The bag-making process is the procedure by which composite film is heat-sealed into a bag shape. Packaging bag manufacturer Note that the inner layer of composite packaging bags and films must be a heat-sealable film. The pouch‑making process for flexible packaging is divided into two types: back-seal pouching and side-seal pouching. In the back-seal method, the pouch is formed by folding the edges together and then cut to complete the composite packaging bag.
Qingdao Platinum Packaging Technology Co., Ltd. specializes in a wide range of packaging products, including retort pouches, composite packaging bags, kraft paper bags, zip-lock bags, aluminum foil bags, stand-up pouches, thermal transfer films, warning tapes, food-grade bags, vacuum bags, plastic bags, and more. Please feel free to call us for inquiries.
Composite packaging bags, packaging bag manufacturer
Qingdao SINOY Packaging Technology Co., Ltd. is a specialized manufacturer of plastic flexible packaging.
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Factory Address: Zhuzhu Road, Jiaoxi Industrial Park, Jiaozhou City, Qingdao
Office Address: 27th Floor, No. 32 Hong Kong Middle Road, Shinan District, Qingdao City
