I have the same questions like that before when I haven't found my supplier of PVC or PET stickers! and oh! their web page is here https://www.allstickerprinting.com/ and this is how they explain to me the difference. I hope this explanation clears the topic.Many types of plastic materials are available to produce packaging. When you need to create a design to package your products, you may soon discover that two plastic materials are commonly used: PET and PVC. At Plastic Ingenuity, we have clients ask us which plastic materials prove to be most advantageous for their thermoformed packaging designs. Here, we&#;ve outlined explanations for these two plastics, as well as which proves to be the most beneficial to help you determine which to use.PET plasticPET, or polyethylene terephthalate plastics is one the most widely used plastics for thermoforming. The material is molded into the designated shape, and then dried for increased resistance. The plastic is used to produce food containers, beverage bottles, synthetic fibers and more. PET is the most common plastic for thermoforming packaging designs because of its high-strength barrier that can resist outside tampering or other elements.PVC plasticPVC plastic, or polyvinyl chloride, is a rigid plastic designed to withstand harsh impacts and extreme temperatures. The material is most commonly used when creating cables, roofing materials, commercial signage, flooring, faux leather clothing, pipes, hoses and more. PVC plastic is created through suspension polymerization to produce a hard, rigid structure.PET plasticThe following are the biggest benefits that PET plastic provides:More versatility&#;PET plastic can be thermoformed for a variety of applications. Although the material is lightweight, it is still strong enough to withstand outside elements for many applications.Safer for storing materials, especially food&#;PET plastic is highly suitable for packaging food items, as well as retail, electronic and other products.Increased durability &#;PVC is a rigid plastic that has some durability. Over time, though, the material may break down from exposure to UV rays&#;something that is not ideal for packaging materials, especially for food or retail designs. PET plastic, however, is designed to withstand UV rays, making it a suitable choice for almost all thermoformed packaging designs.
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PVC stands for Polyvinyl chloride. Often referred to as vinyl it's popular for wrapping vehicles because of how flexible it can be.
Polyester (PET) is a film with outstanding durability, temperature, UV, and chemical resistance. Polyester tends to be great for labels with outdoor applications.
Polypropylene (BOPP) is a film with high tear resistance & rigidity, making it ideal for beverage & many other label applications. It's the industry standard for labels.
Polyethylene Film (PE) falls into two main categories; low-density (LDPE) & high-density (HDPE).
The term vinyl is a common name for a print film made from PVC.
It's a popular material in the sign trade and custom sticker & label industry. Although more widely recyclable alternatives, such as PP & PE, are gaining in popularity, especially for label applications. We are using a widely recyclable PP for our vinyl stickers and labels.
Cast & calendered are two 'grades' of vinyl, referring to how the film is made.
Making a cast vinyl begins with a formulation (aka recipe) that's all mixed in a large bowl in a precise way.
This mixture, known as 'organosol', is then precisely metered or cast onto a moving web known as the casting sheet.
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It passes through multiple ovens to evaporate the solvents leaving a solid film. This film is wound onto large rolls ready for further processing, usually adhesive coating.
Cast materials are very stable, and can be very thin, which can make them extremely conformable.
Because of this, wrapping vehicles & boats are prevalent applications of cast films.
Calendered films are also mixed and later kneaded in an extruder by huge heated rollers to form a long, thin sheet of vinyl.
The vinyl mix gets fed between two large counter-rotating rolls, heated at 350°F.
This mix gets pulled between the rolls and flattens because of the temperature & pressure, forming a 'strip'. The strip passes over multiple calender rolls getting thinner each time.
Embossing rolls apply gloss or matte 'patterns' to the film whilst it's still heated. Now that the film it's cooled and transported to be wound into large master rolls.
Calendered vinyl films range from economy to high-grade.
Using 'monomeric plasticizers' keeps the cost down for economy films, whereas higher grade films use a 'polymeric plasticizer'.
Here are the fundamental differences between all films, for easy comparison:
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