How is the physical properties of POF, PE and PVC shrink film?
The proportion of POF is 0.92, the thickness is the thinnest 0.012mm, the actual unit cost is lower. The PE specific gravity is 0.92, the thickness is the thinnest 0.03 or more, the actual unit cost is higher. The PVC specific gravity is 1.4, the thickness is the thinnest 0.02mm, the actual unit cost is higher. When POF shrink packaging, the seal at the corners of the soft will not cut people's hands, but also resistance to rubbing. PE shrink packaging, the four corners of the soft seal will not cut the hand. PVC shrink packaging, the sealing corners hard and sharp, it easy to cut bleed.
|POF is non-toxic and does not produce toxic odors when processed. It is compliant with the US FDA and USDA standards. PE is non-toxic and does not produce toxic gases during processing. It is compliant with the US FDA and USDA standards. PVC is toxic, processing will produce odors, toxic gases, and gradually banned. POF thin and tough, uniform thickness, good moisture resistance, soft texture, high tensile strength, high tear strength, adjustable shrinkage. Due to the presence of LLDPE, better resistance to rubbing. PE thick and tough, uniform thickness, good moisture resistance Soft texture. Tearing strength is lower than POF, but far higher than PVC, poor adjustability of shrinkage. Resistance to rubbing is not as good as POF. PVC is thick and brittle, uneven thickness, poor moisture resistance, texture is hard and brittle, strength is low, shrinkage Low rate, poor resistance to rubbing.|
POF excellent cold resistance, -50 °C is not hard not brittle, not easy to break, can be used for frozen food packaging. After shrink packaging, -50 °C - 95 °C long-term storage of the package, stable and stable. Static electricity and anti-fog treatment , Difficult to pollute dust, keep the product clean and bright. PE cold special, in winter or after freezing, not hard, not brittle, so the transport is not easy to break. With static elimination, not easy to dust, can keep the product clean. PVC Cold resistance is extremely poor, and embrittlement occurs in winter or after freezing. Therefore, it is easy to break during transportation. The longer the shrinkage packaging, the tighter the shrinkage, and the deformation of the packaged product. Without static elimination, it is easy to contaminate the dust and cause product contamination is ambiguous.
The POF process does not generate moisture and stick to the sealing rods. It is easy to maintain and operate. The high toughness, smoothness and anti-rubbing properties make it suitable for automatic packaging of high-speed production lines. The PE process does not generate moisture and does not stick to the seals. On the stick, easy maintenance and operation. High toughness, low kneading, can be used for automatic packaging of higher speed production lines. PVC process will produce volatile, easy to cause mechanical damage, but also easy to stick on the sealing rod, the operation is not convenient, difficult to maintain .