If it is determined to be completely sealed and cannot be recovered after being opened, then this is the situation that affects secondary sales. This situation has had an impact on the start of rights protection of unreasonable return service. You can negotiate with the seller or communicate the package discount.

Plastic packaging film, also known as hot laminating film, card protective film, shell protective film and plastic film, is a good helper for plastic packaging film of photos and documents in life. The plastic packaging film needs to be heated by a plastic packaging machine, and different thickness needs to refer to different plastic packaging temperatures, which is related to the pressure and speed of the plastic packaging machine and the thickness of the plastic packaging film.

The advantages of plastic film are: moisture-proof, dust-proof, anti-fading, protecting documents and photos, and long-term use. Plastic packaging film, also known as card protective film, plastic film. Materials used for plastic packaging of paper usually contain plastic components.

Before use, according to the size of the paper that needs plastic packaging, cut out the plastic packaging paper with the appropriate size. Generally, there are various standard plastic packaging papers on the market, such as A4 and A6. Generally speaking, the area of plastic-coated paper needs to be larger than the paper to be plastic-coated.

The paper to be plastic-sealed is evenly sandwiched between two layers of plastic-sealed paper and heated by a plastic-sealing machine. After the plastic paper is heated, it is sealed with plastic paper (because the opposite sides of the plastic paper have glue, which will stick together after heating), which is waterproof to a certain extent and prolongs the service life.

When plastic packaging data pages, it is necessary to separate the plastic packaging film, sandwich the data pages in the middle, make the adhesive surface of the plastic packaging film face the data pages, then close the plastic packaging film, send it to the plastic packaging machine from front to back for heating, then press it with the front and rear rubber rollers, and then come out from the rear discharge port, thus achieving the purpose of plastic packaging.