PE Shrink Film

High Stretch Ratio and Elastic Recovery

Made from linear low-density polyethylene (LLDPE), these films undergo biaxial stretching. This process allows longitudinal and transverse stretch ratios to reach 300%-500%-far higher than the 100%-200% of regular PE films. When wrapping goods, they generate 20-30N of contractile force. This tightens around palletized items, securing them firmly and preventing movement during transport.

Their elastic recovery rate is at least 90%. Even when wrapping heavy loads for long periods, the film doesn't loosen easily. This makes it ideal for securing irregularly shaped items like furniture and building materials.

Puncture and Tear Resistance

PE Shrink Film thickness ranges from 12-100μm, with 20-30μm being most common. It boasts a puncture strength of ≥25N (tested to ASTM D4833 standards), standing up to sharp objects like wooden crate corners and metal parts. Its right-angle tear strength is ≥80N/25mm, resisting cracks when impacted and protecting the contents inside.

Moisture Resistance and Weatherability

With a water vapor transmission rate of ≤5g/(m²・24h), it blocks moisture from humidity-sensitive items such as electronic components and food. Sun-resistant stretch films, which include UV additives, retain ≥80% of their tensile strength after 500 hours of UV aging tests. This makes them suitable for outdoor storage.

Fast Wrapping and Low Energy Consumption

These PE Shrink Film work seamlessly with automatic wrapping machines (rotating at 10-30 rpm). A single machine can handle 200-300 pallets per hour-5-8 times faster than manual packing. The film's self-adhesiveness (with a surface friction coefficient of 0.8-1.2) eliminates the need for tape, reducing costs for auxiliary materials.

The "pre-stretching" process (at a 200% stretch ratio) cuts film usage per square meter by 40%. For example, traditional packaging might require 50 meters of film per pallet, but pre-stretched film needs only 30 meters. A company using 100,000 rolls annually could save approximately 150,000 yuan in material costs.

Transparency and Labeling Capabilities

With a light transmittance of ≥90%, it allows direct inspection of goods-checking for damage or missing parts without unpacking. The surface accepts friction-resistant inks for printing company logos or warning signs. The ink layer achieves ISO 4B adhesion, staying intact during transport.

In the food and pharmaceutical industries, where hygiene and odorlessness are critical, food-grade LLDPE films are used. These meet FDA 21CFR 177.1520 standards, with migration levels ≤0.1mg/dm², and tolerate short-term sterilization at 80°C.

For hazardous chemical products, conductive PE films with anti-corrosion coatings are ideal. They have a surface resistance of 10⁶-10¹¹Ω and withstand 72-hour immersion in 30% sulfuric acid with a weight change of <1%, making them suitable for lithium batteries and solvent packaging.

In frozen storage, cold-resistant PE films modified with EVA maintain a breaking elongation of ≥200% at -40°C without embrittlement or cracking. They're used for packaging seafood and ice cream pallets.

For bulk cargo transport, enhanced UV stretch films (with 5% metallocene catalyst) offer tensile strength ≥35MPa and weather resistance lasting 1,000 hours in QUV-A tests. These suit outdoor-stored building materials and steel products.

Compared to cardboard: 1 ton of stretch PE Shrink Film (covering ~8,000 m²) can package 400 pallets, costing 3-5 times less than equivalent cardboard. Wrapping machines operate automatically, eliminating the need for manual folding and taping, cutting labor costs by 60%.

Compared to strapping tape plus bubble wrap: Stretch film's full wrapping prevents localized damage from uneven force, while bubble wrap often loses its cushioning when squeezed. Film rolls also take up 1/3 the storage space of bubble wrap rolls, saving warehouse area.

In e-commerce logistics, thin 15-20μm stretch film works for small packages-2-3 layers suffice, costing less than 0.1 yuan per package. For palletized shipments, automatic film-threading machines can wrap an entire pallet in 5 seconds, ideal for bulk deliveries of 3C products and home appliances.

In manufacturing, anti-static stretch film (with surface resistance of 10⁸Ω) protects car circuit boards from static damage. For metal products, stretch film with rust-inhibiting masterbatch (containing 0.5% VCI vapor corrosion inhibitor) prevents steel plates and pipes from rusting for up to 6 months.

In agriculture, specialized silage stretch film (75-100μm thick) has an oxygen transmission rate ≤10cc/(m²・24h). It creates an anaerobic environment, improving the fermentation quality of feed.

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