OPET and PETG thermal shrink membranes differ significantly in multiple ways. Here are the main differences between them:
1. Material and performance:
-BOPET thermal shrinkage film (bidirectional tensile polyester thermal shrinkage film): This thermal shrinkage film is mainly made of polyester (PET) material and is processed by the bidirectional stretching process. It usually has excellent physical properties, such as high transparency, good tear resistance, and wear resistance. However, the information on the specific shrinkage rate and temperature contraction range of the BOPET thermal contraction film is not explicitly mentioned in the reference articles provided.
-PETG thermal shrinkage film: PETG thermal shrinkage film is a non-crystalline copolyester material, which is more environmentally friendly than PVC shrinkage film. It has a good shrinkage performance at high temperature, and has a more durable performance. The shrinkage rate of the PETG thermal shrinkage film is usually between 60 and 80%, and its shrinkage curve is relatively flat, which facilitates a more precise control of the thermal shrinkage of the label. In addition, PETG thermal shrink film also has the characteristics of high transparency, high gloss, non-toxic and tasteless.
2. Application areas:
-BOPET thermal shrink film: Due to its excellent physical properties, BOPET thermal shrink film has been widely used in many fields, such as packaging in food, medicine, cosmetics and other industries. It can fit tightly to the surface of various shapes, forming a smooth, compact packaging layer.
-PETG thermal film: PETG thermal film is usually used in the label packaging of various beverage bottles. Due to its high shrinkage rate and excellent printing performance, PETG thermal shrinkage film can completely reflect the image of the product, improve the appearance of the product, is conducive to the advertising of the product.
3. Environmental protection:
-BOPET thermal shrink film: the environmental protection of BOPET thermal shrink film is not mentioned in the reference articles provided. However, since it is made from polyester materials, its environmental properties may be affected by the raw materials and the production process.
-PETG thermal shrink film: PETG thermal shrink film is more environmentally friendly than PVC shrink film. The materials it uses all meet the environmental protection standards and will not cause pollution to the environment. At the same time, in the process of production and use will not release toxic and harmful substances, harmless to human health.
4. Price and Cost:
-The price and cost of BOPET thermal shrink film and PETG thermal shrink film may vary according to the market supply and demand, raw material price, production process and other factors. Specifically, the production process of PETG thermal shrinkage film is relatively complex, and one of the raw materials, CHDM (1,4-cyclohexane dimethanol), is expensive, resulting in the price of PETG is much higher than PVC.
In conclusion, BOPET and PETG thermal shrink films differ in material, performance, application field, environmental protection and price. In the choice of use, it needs to be comprehensively considered according to the specific needs and market conditions.