PE stretch film has the advantages of toughness, high elasticity, tear resistance, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, dustproof, waterproof, single-sided adhesion and double-sided adhesion. It can save materials, save labor, save time, and is widely used in papermaking, logistics, chemical, plastic raw materials, building materials, food, glass, etc. PE stretch film plastic packaging bags can be divided into three types: three-side seal, mid-bottom seal, three-dimensional middle seal and sheet material according to the bag making method.
1. The three-side seal is sealed around the packaging bag. The size of the front and back are finished products, which have a certain overall sense. The design is not constrained, and the front and rear designs have certain consistency. Since the front and back dimensions are the same, you can design the front side to match the back and front. The plate and the back should be arranged on the same set of rollers.
2. The midsole seal is sealed on the back side, the front dimension is the finished size, the back side is divided into two equal parts, and the sum of the widths is equal to the width of the front side, usually in the design, the front and back sides are unfolded for integrated design, and Add 1cm edge to each side, and the front and back are also on the same set of rollers.
3. The three-dimensional middle seal is based on the midsole seal, with three-dimensional sides on both sides, and the front and side sides are also on the same set of rollers.
4. PE stretch film material due to the limitation of printed materials, the front and back sides must be designed separately, separately plated, can not appear on the same set of cylinders at the same time.
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