Do you want to know the production process of steaming and boiling bag manufacturers?

The production process of steaming and boiling bag manufacturers mainly includes the following key steps:

1、 Material selection and preparation

Substrate selection: Common substrates for cooking bags include PET (biaxially oriented polyester film), NY (nylon film), AL (aluminum foil), and RCPP (cast polypropylene film). These substrates have excellent physical and mechanical properties as well as barrier properties.

Ink and glue selection: Ink and glue need to have good compatibility and high temperature resistance with the substrate. The heat resistance of ink mainly depends on the heat resistance and moisture resistance of polyurethane resin, while glue needs to have excellent adhesive strength and moisture resistance.

Material pretreatment: Perform corona treatment on the substrate to increase its surface tension and enhance its adhesion with ink and glue. At the same time, ensure that the thickness of the substrate is uniform and the shrinkage rate is stable.

2、 Composite process

Dry lamination method: The substrate, ink, and adhesive are compounded through processes such as coating, drying, lamination, and curing. This is a commonly used composite process in the production of cooking bags, which is widely used due to its stable process quality, flexible material arrangement and combination, and high safety.

Glue application: Apply the glue evenly onto the substrate, control the amount of glue applied, and ensure the composite strength.

Drying: Remove solvents from the glue to avoid the impact of residual solvents on product performance.

Composite: bonding a substrate coated with adhesive to another layer of substrate.

Maturity: Under a certain temperature and time, the adhesive is fully cured to form a strong composite structure.

Solvent free composite method and co extrusion composite method: These two methods are also applied in the production of cooking bags, but compared to them, dry composite method has more advantages in process quality and safety.

3、 Bag making process

Heat sealed bag making: The composite film material is heat sealed into bags using a heat sealing machine. The heat sealing process parameters include temperature, pressure, and time, which complement and depend on each other. Temperature plays a dominant role, while pressure and time play auxiliary roles.

Quality inspection: Conduct quality inspection on the made cooking bags, including heat sealing strength, elongation at break, resistance to pendulum impact, oxygen permeability, sealing performance, and other indicators. Ensure that the product meets relevant standards and customer requirements.

4、 Post processing and packaging

Cooling and shaping: After heat sealing, the steaming bag needs to be cooled and shaped to avoid the formation of wrinkles and ripples in the heat sealing position.

Finished product inspection: Inspect finished products to ensure stable and reliable product quality.

Packaging and Storage: Pack the qualified steaming and cooking bags and store them in a dry, cool, and ventilated environment, avoiding direct sunlight and high temperatures.

In summary, the production process of steaming and boiling bag manufacturers includes multiple stages such as material selection and preparation, composite process, bag making process, and post-treatment and packaging. Each stage requires strict control over quality and technical parameters to ensure that the product's performance and quality meet relevant standards and customer requirements.