What are the differences in physical properties between POF shrink film and PE and PVC shrink film?
1. Physical properties
POF is thin and tough, uniform thickness, good moisture resistance, soft texture, high tensile strength, high tear resistance, adjustable shrinkage, good friction resistance;
PE is thick, uniform in thickness, good in moisture resistance, soft in texture, lower in tear strength than POF, but much higher than PVC, poor in friction resistance, and inferior in friction resistance to POF;
PVC is thick, uneven in thickness, poor in moisture resistance, hard and brittle in texture, low in strength, low in shrinkage, and poor in friction resistance.
2. Cold resistance
POF heat shrinkable film has good cold resistance, is not hard or brittle at -50, and is not easy to break, so it can be used for frozen food packaging. Store at -50-95 for a long time after shrinking, and the packaging remains unchanged. With electrostatic anti-fog treatment, it is not easy to pollute the dust and keep the product fresh;
PE heat shrinkable packaging is easy to break during transportation. Or it will not harden and become brittle after being frozen in winter, and it will not be easily damaged during transportation. With static elimination treatment, it is not easy to be contaminated with dust and can keep the product fresh;
PVC shrink film is cold-resistant, fragile in winter or frozen, and easy to break during transportation. The longer the packaging shrinks, the tighter the shrink packaging is, and the easier it is to deform. Without static electricity elimination treatment, it is easy to be contaminated with dust, making the product contaminated and blurred.
3. Processing performance
POF processing does not generate gas, does not stick to seal, and is easy to maintain and operate. High toughness, smoothness and friction resistance, suitable for automatic packaging in high-speed production lines;
PE processing does not produce gas, does not stick to seal, and is easy to maintain and operate. High toughness, low kneading, suitable for automatic packaging of high-speed production lines;
PVC processing will produce harmful gas, which does not meet the requirements of environmental protection and is easy to cause mechanical damage, but it is easy to stick and seal, inconvenient to operate and difficult to maintain.
After POF shrink packaging, the four corners of the seal are soft, will not hurt hands, and are also resistant to friction;
After PE shrink packaging, the four corners of the seal are soft and will not hurt hands;
After PVC shrink packaging, the four corners of the seal are hard and sharp, which is easy to hurt hands.
5. Environmental protection and sanitation
POF is non-toxic, has no toxic smell during processing, and complies with FDA and USDA standards;
PE is non-toxic, does not produce toxic gas during processing, and meets the standards of FDA and USDA;
PVC is poisonous and will produce peculiar smell during processing, so it is gradually banned.
The above is the introduction of the relevant content about "the difference in physical properties between POF shrink film and PE and PVC shrink film".