Plastic flexible packaging: the process, the main points of full analysis


All walks of life, the demand for plastic flexible packaging is not a few, plastic packaging bags also occupy the market with its advantages of bright color and easy to use. So what is the process of plastic flexible packaging? What's the point? Let's have a look!

1. Material selection:

Substrate selection: Select the appropriate plastic film according to the characteristics of the packaging product, such as polyethylene (PE), polypropylene (PP), polyester (PET), etc.
Composite material selection: According to the need to choose composite materials, such as aluminum foil, nylon or other plastic film, to improve the barrier property of the packaging, mechanical strength, etc.

2. Printing process:

Plate roller preparation: According to the design pattern to make digital or gravure to ensure the exact reproduction of the pattern.
Ink selection: Select the ink suitable for plastic film to ensure good adhesion and printing effect.
Printing operation: Control printing speed, pressure and temperature to ensure clear printing pattern and uniform color.

3. Composite process:

Adhesive selection: Select the right adhesive according to the substrate and composite material to ensure good bonding strength.
Composite operation: Control the composite temperature, pressure and speed to ensure that the layers of materials are tightly bonded, no bubbles, no delamination.


Curing conditions: curing at a specific temperature and time to fully cure the adhesive and improve the performance of the composite film.

5. Cutting process:

Slitting machine adjustment: Adjust the cutting tools and parameters of the slitting machine according to the package size to ensure cutting accuracy.
Slitting operation: Control slitting speed and pressure to ensure that the cutting edge is neat and without burrs.

6. Bag making process:

Bag making machine adjustment: Adjust the parameters of the bag making machine according to the bag type, such as sealing temperature, pressure and time.
Bag making operation: Ensure that the size of the bag is accurate, the sealing is firm, and there are no problems such as leakage sealing and bad heat sealing.

7. Quality inspection:

Appearance inspection: Check whether the printing pattern, composite quality, cutting edge, etc., meets the standard.
Functional testing: thermal sealing strength, tensile strength, barrier performance and other tests to ensure the functionality of the packaging.

8. Packaging and storage:

Finished product packaging: The finished flexible packaging bag is properly packed to prevent dust and moisture.
Storage conditions: Ensure that the finished product is stored in a suitable environment to avoid adverse conditions such as high temperature and humidity affecting product quality.

In the entire production process, each link needs to be strictly controlled to ensure the quality of the final product. In addition, with the increasing awareness of environmental protection, the selection of recyclable or biodegradable materials, as well as the optimization of production processes to reduce energy consumption and waste generation, are also important considerations for modern plastic flexible packaging processes.

Hunan Kexin Packaging Co., Ltd.
RM1124,Bld 1, Jinqiao International Weilai Town, Changsha, China
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