Core Applications of Stretch Film
1. Logistics and Transportation
Stretch film accounts for over 60% of the logistics industry (data source: 2022 Global Packaging Association report), primarily used to secure and prevent the spread of palletized cargo. Through multiple layers of wrapping, it effectively prevents cargo from tilting and scattering during transport, making it particularly suitable for fragile items such as electronics and building materials. For example, a single standard pallet typically requires 8-12 wraps, with a film thickness of 20-30 microns and capable of withstanding lateral pressure exceeding 200 kg.
2. Warehouse Protection
In storage, stretch film can isolate dust and moisture, extending the storage life of goods. Industries with high hygiene requirements, such as food and pharmaceuticals, often use UV-resistant stretch film (light transmittance <5%) to prevent deterioration caused by direct sunlight. Furthermore, goods stored in cold storage are protected against brittle cracking using specialized low-temperature film (resistant to -30°C).
3. Agricultural Covering and Preservation
Stretch film is commonly used in the agricultural sector to wrap silage, fruits, and vegetables. Its breathable design (oxygen transmission rate 1000-1500 cm³/m²/24h) helps balance internal humidity and extend shelf life. For example, when storing corn stalks, stretch film can reduce nutrient loss by over 30% (cited from a 2021 study in the Journal of the Chinese Society of Agricultural Engineering).
Extended Applications and Innovative Applications
1. Industrial Equipment Protection
Stretch film can be used to protect large machinery or precision instruments from rust and scratches during relocation or downtime. Some high-temperature films (resistant to 120°C) can also be used for short-term high-temperature protection, such as in the metallurgical industry.
2. Home and Temporary Uses
Stretch film can be used to secure items in drawers or cover furniture to prevent dust during moving. It can even replace temporary tarps during outdoor activities. While niche, this application is expected to see demand growing by approximately 15% annually (2023 Consumer Goods Market Research).
Materials and Environmental Trends
Currently, the mainstream stretch film material is LLDPE (linear low-density polyethylene), accounting for over 80% of the market. This material is known for its high ductility (stretching rate >300%) and low cost. With increasing environmental protection requirements, biodegradable stretch films (such as PLA-based materials) are being piloted. However, their cost is 2-3 times that of traditional films, and large-scale application still requires technological breakthroughs.