Stretch film also known as stretch wrap first was made with PVC as the base material and DOA as the plasticizer for self-adhesive function. Due to environmental protection issues, high cost (relative to PE, relatively large proportion, small unit packaging area), poor stretchability and other reasons, when PE stretch film was invented, it was gradually eliminated. Stretch film has good transparency, good longitudinal extensibility, good resilience, good horizontal anti-scattering performance, and excellent self-adhesive lapping. PE stretch film is mainly made of several different grades of polyethylene resin mixed and extruded, with puncture resistance, ultra-thin, high strength and other properties. It’s good for wrapping goods stacked on the pallet to make the packaging more stable, tidy, waterproof and dustproof, and is widely used in shipping.
PE stretch film: It is an industrial film-coated product with high tensile strength, high elongation, good self-adhesiveness, and high transparency. It can be used for manual stretch wrapping, and also can be used for machine stretch wrapping, widely used in centralized packaging of various goods. PE stretch film is mainly made of several different grades of polyolefin resin mixed and extruded. It has puncture resistance, super strength and high performance. It wraps the goods stacked on the pallet to make the package more stable and neat Strong waterproof effect, widely used in shipping, paper making, hardware, plastic chemical industry, building materials, food and pharmaceutical industries.
LLDPE stretch film: LLDPE stretch film is made of high-quality LLDPE as the base material, with high-quality tackifier added, heated, extruded, cast, and then cooled by chilling rolls, with strong toughness and high elasticity. , anti-tearing, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, dustproof, waterproof, single-sided adhesive and double-sided adhesive, etc., can save materials, save labor, save time and widely used in papermaking, logistics, chemical industry, plastic raw materials, building materials, food, glass, etc.
The general properties of PE stretch film:
- Unitization: This is one of the biggest features of stretch film packaging. With the help of the super strong winding force and retractability of the film, the products are compactly and fixedly bundled into a unit, making the scattered small parts as a whole, even in an unfavorable environment to avoid damage.
- Primary protection: Primary protection provides surface protection of the product, forming a very light and protective appearance around the product, so as to achieve the purpose of dustproof, oilproof, moistureproof, waterproof and anti-theft. It is particularly important that the stretch film wrapping makes the packaged items evenly stressed and avoids damage to the items caused by uneven force, which cannot be achieved by traditional packaging methods (bundling, packaging, tape, etc.).
- Compression fixity: The product is wrapped and packaged with the help of the retractive force of the stretched film to form a compact unit that does not take up space, so that the pallets of the product are tightly wrapped together, which can effectively prevent the product from being damaged during transportation. At the same time, the adjustable stretch force can make firm products stick tightly and soft products shrink, especially in the tobacco industry and textile industry, which has a unique packaging effect.
- Cost saving: Using stretch film for product packaging can effectively reduce the cost of use. The use of stretch film is only about 15% of the wooden crate packaging, 35% of the heat shrink wrapping film and 50% of the carton packaging. At the same time, it can reduce the labor intensity of workers, improve packaging efficiency.