What is the difference between PET film and PVC film?

PVC and PET are common plastic materials in our lives. Because these two products are similar in appearance, many people can’t tell the difference between them. Today, I will introduce several ways to distinguish them.

Surface discrimination method: first look at the surface. Most of the bluish light is PVC sheet, because the PVC formula is added with ultramarine, disperse violet, fluorescent powder and other colorants, and most of the pet sheets are not blue;

Identification of folding marks: Cut a small piece of each of the two materials and fold them in half respectively. You will find that most of the PVC sheets will produce white creases, so the white marks on the half-fold are usually PVC sheets. The white mark is not obvious or almost invisible is the PET sheet.

Fire method: When burning, black smoke billows, and at the same time the irritating smell is heavier and the burning edge has black crystals is the PVC sheet, because the PVC sheet is a polychloride molecule, with combustion-supporting properties, it will automatically extinguish when it leaves the fire source. The pet sheet also burns under the flame, with little black smoke and light, and it continues to burn even after the fire source is removed.

Feb 22,2022

Polyethylene terephthalate plastics, mainly including polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). PET, the molecular structure is highly symmetrical, and has a certain ability of crystal orientation, so it has high film-forming and forming properties. PET has good optical properties and weather resistance, and amorphous PET has good optical transparency. In addition, PET has excellent abrasion resistance, dimensional stability and electrical insulation. Bottles made of PET have high strength, good transparency, non-toxicity, anti-penetration, light weight and high production efficiency, so they have been widely used. The molecular chain structure of PBT and PET is similar, and most of the properties are the same, except that the main chain of the molecule has changed from two methylene groups to four, so the molecule is more flexible and the processing performance is better.

The main uses of polyethylene terephthalate plastic PET film are:
PET film sheet: all kinds of food, medicine, non-toxic and sterile packaging materials; high-grade packaging materials for textiles, precision instruments, electrical components; audio tapes, video tapes, film films, computer floppy disks, metal coatings and photosensitive films, etc. substrates; electrical insulating materials, capacitor films, flexible printed circuit boards and membrane switches and other electronic and mechanical fields.

What is PVC?
PVC, the full name of Polyvinyl Chloride (polyvinyl chloride), is a synthetic material, the main component is polyvinyl chloride, and other components (anti-aging agents, modifiers, etc.) are added to enhance its heat resistance, toughness, ductility sex, etc. Its essence is a vacuum plastic film, the top layer of this surface film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is a back coating adhesive. Often used for surface packaging of various types of panels.

What is PET film?Polyethylene terephthalate plastics, mainly including polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). PET, the molecular structure is highly symmetrical, and has a certain ability of crystal orientation, so it has high film-forming and forming properties. PET has good optical properties and weather resistance, and amorphous PET has good optical transparency. In addition, PET has excellent abrasion resistance, dimensional stability and electrical insulation. Bottles made of PET have high strength, good transparency, non-toxicity, anti-penetration, light weight and high production efficiency, so they have been widely used. The molecular chain structure of PBT and PET is similar, and most of the properties are the same, except that the main chain of the molecule has changed from two methylene groups to four, so the molecule is more flexible and the processing performance is better.The main uses of polyethylene terephthalate plastic PET film are:PET film sheet: all kinds of food, medicine, non-toxic and sterile packaging materials; high-grade packaging materials for textiles, precision instruments, electrical components; audio tapes, video tapes, film films, computer floppy disks, metal coatings and photosensitive films, etc. substrates; electrical insulating materials, capacitor films, flexible printed circuit boards and membrane switches and other electronic and mechanical fields.What is PVC?PVC, the full name of Polyvinyl Chloride (polyvinyl chloride), is a synthetic material, the main component is polyvinyl chloride, and other components (anti-aging agents, modifiers, etc.) are added to enhance its heat resistance, toughness, ductility sex, etc. Its essence is a vacuum plastic film, the top layer of this surface film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is a back coating adhesive. Often used for surface packaging of various types of panels.