1. The proportion of cost POF is 0.92, the thinnest thickness is 0.012 mm, and the actual unit cost is lower. The proportion of PE is 0.92, the thinnest thickness is more than 0.03, and the actual unit cost is higher. The proportion of PVC is 1.4, the thinnest thickness is 0.02 mm, and the actual unit cost is higher.

2. Physical properties POF thin and tough, uniform thickness, good moisture resistance, soft texture. High tensile strength, tear resistance, adjustable shrinkage. Because of the existence of LLDPE, rubbing resistance is better. PE thick and tough, uniform thickness, good moisture resistance, soft texture. Tear strength is lower than POF, but far higher than PVC, shrinkage adjustability is poor. Rubbing resistance is not as thick and brittle as POF. PVC is not as brittle as POF. Non-uniform thickness, poor moisture resistance, hard and brittle texture, low strength, low shrinkage, poor rubbing resistance.

3. POF has excellent cold resistance, which is not hard or brittle at - 50 C and is not easy to crack. It can be used in frozen food packaging. After shrinkage packaging, - 50 C - 95 C is stored for a long time and remains stable. It has static electricity and anti-fog treatment, and is not easy to pollute dust. It can keep the product clean and bright. PE has excellent cold resistance. It is not hard or brittle in winter or after freezing. This transport is not easy to break. There are static elimination treatment, not easy to dust, can keep the product clean. PVC cold resistance is very poor, brittle in winter or after freezing, so it is easy to break in transport. The longer the shrinkage package is, the tighter the shrinkage will be, the packaging will be deformed. No static elimination treatment, easy to be contaminated with dust, so that the product pollution is blurred.

4. Processing performance POF processing process does not produce moisture and does not adhere to the sealing rod. Maintenance and operation are easy. High toughness, smoothness and rubbing resistance make it suitable for automatic packaging in high-speed production line. PE processing process does not produce moisture, nor does it adhere to the sealing rod. Maintenance and operation are easy. High toughness, low rubbing, can be used in high-speed production line. Dynamic packaging. PVC processing process will produce volatile, easy to cause mechanical damage, and easy to adhere to the sealing rod, inconvenient operation, maintenance difficulties.

5. Safety POF shrinkage packaging, the four corners of the seals are soft, will not cut hands, but also rub-resistant. PE shrinkage packaging, the four corners of the seals are soft, will not cut hands. PVC shrinkage packaging, the four corners of the seals are hard and sharp, easy to cut and bleed.

6. Environmental hygiene POF is non-toxic and does not produce toxic odor during processing. It meets the FDA and USDA standards of the United States. PE is non-toxic and does not produce toxic gases during processing. It conforms to the FDA and USDA standards. PVC is toxic and can produce odor and toxic gases during processing, which are gradually banned.