1. The cost POF has a specific gravity of 0.92 and a thinnest thickness of 0.01mm, resulting in a lower actual unit cost PE has a specific gravity of 0.92 and a thickness of at least 0.03, resulting in a higher actual unit cost PVC has a specific gravity of 1.4 and a thinnest thickness of 0.02mm, resulting in a higher actual unit cost.
2. Physical properties: POF is thin and tough, with uniform thickness, good moisture resistance, soft texture, high tensile strength, high tear resistance, and adjustable shrinkage rate. Due to the presence of LLDPE, it has better resistance to rubbing PE is thick and tough, with uniform thickness, good moisture resistance, and a soft texture. Its tear resistance is lower than that of POF, but much higher than PVC, and its shrinkage rate is not adjustable. Its rubbing resistance is not as good as that of POF PVC is thick and brittle, with uneven thickness, poor moisture resistance, hard and brittle texture, low strength, low shrinkage rate, and poor resistance to rubbing.
3. Cold resistance and other physical properties: POF has excellent cold resistance, is not hard or brittle at -50 ℃, and is not easy to break. It can be used for frozen food packaging. After shrink packaging, it is stored for a long time at -50 ℃ -95 ℃, stable and unchanged. It has static electricity and anti fog treatment, is not easy to pollute dust, and can keep the product clean and bright PE has excellent cold resistance and does not harden or become brittle in winter or after freezing, making it less prone to breakage during transportation. It has electrostatic elimination treatment and is less prone to dust contamination, which can keep the product clean PVC has extremely poor cold resistance and can become brittle in winter or after freezing, making it prone to breakage during transportation. The longer the shrink packaging is used, the tighter it will shrink, causing deformation of the packaging material. Without static electricity elimination treatment, it is easy to be contaminated with dust, making the product contaminated and blurry.
4. Processing performance: The POF processing does not produce moisture or adhere to the sealing rod, making it easy to maintain and operate. Its high toughness, smoothness, and anti rubbing properties make it suitable for automatic packaging on high-speed production lines The PE processing process does not produce moisture or stick to the sealing rod, making it easy to maintain and operate. It has high toughness and low rubbing ability, and can be used for automatic packaging on high-speed production lines The PVC processing process produces volatile matter, which is prone to mechanical damage and adhesion to the sealing rod, making operation inconvenient and maintenance difficult.
5. Safety: After POF shrink packaging, the four corners of the sealing area are soft, will not cut hands, and is also resistant to rubbing After PE shrink packaging, the four corners of the seal are soft and won't cut people's hands After PVC shrink packaging, the four corners of the sealing area are hard and sharp, making it easy to cut and bleed.
6. Environmentally friendly and hygienic POF is non-toxic, does not produce toxic odors during processing, and meets US FDA and USDA standards. PE is non-toxic and does not produce toxic gases during processing, meeting US FDA and USDA standards PVC is toxic, and processing can produce a foul odor and toxic gases, which are gradually prohibited.