Standard polyethylene stretch films tend to stiffen and lose cling at low temperatures, which can result in film cracking, reduced load retention, and product damage during frozen storage or winter transport. Yuhong produces a low-temperature resistant stretch film that maintains flexibility at temperatures from -25°C to -30°C. The formulation uses a polyethylene base with a low-temperature toughening modifier, which is blended during extrusion to improve cold-weather performance without sacrificing stretch or puncture resistance.
Key performance indicators for this film include:
| Parameter | Typical Value | Test Method / Reference |
|---|---|---|
| Service temperature range | -30°C to +40°C | Internal cold chamber evaluation |
| Tensile strength retention at -25°C | ≥85% of room-temperature value | ASTM D882 |
| Elongation at break | ≥250% at -20°C | ASTM D882 |
| Cling force | ≥1.2 N | Internal method |
| Film thickness | 17–25 μm | Customizable |
| Width | 350–500 mm | Standard range |
The film is used in cold chain pallet wrapping for frozen food, seafood, and pharmaceutical logistics. In a typical application, a seafood exporter in eastern China used this film for frozen pallet shipments to North America. Prior to switching, standard film cracked during loading and caused partial pallet collapse. After adopting the low-temperature grade, the customer reported no film cracking during six months of continuous frozen shipments, and the number of re-wrapped pallets decreased.
All batches are tested in a temperature-controlled chamber before release. Each production lot is checked for cold-temperature tensile retention and cling. Test records are archived for traceability.
Long-term exposure to sunlight causes conventional stretch film to degrade through photo-oxidation. The film becomes brittle, discoloured, and loses load-holding ability. Yuhong's UV-resistant stretch film includes hindered amine light stabilizers (HALS) and UV absorbers in the formulation. These additives slow the degradation process and help maintain mechanical properties during outdoor storage and long-distance container shipping.
Typical specification parameters are listed below.
| Parameter | Typical Value | Test Method / Reference |
|---|---|---|
| UV protection duration | Up to 1,000 hours (accelerated weathering) | ASTM G154 |
| Tensile strength retention after 1,000 h UV | ≥90% | ASTM D882 |
| Elongation retention after 1,000 h UV | ≥85% | ASTM D882 |
| Film thickness | 20–30 μm | For outdoor applications |
| Colour options | Transparent, white, black, or blue | Custom colours available |
This film is suitable for export pallets stored at docks, construction materials kept in open yards, and industrial equipment shipped on flat racks. A building materials manufacturer in Guangdong used the UV-resistant film for pallets stored outdoors for up to eight weeks. Standard film showed visible cracking and loss of cling after three weeks; the UV-resistant grade remained intact for the full storage period, and no cargo shifting was observed during subsequent truck delivery.
The UV stabilizer package is compounded before extrusion to ensure even distribution. Batch samples are tested quarterly by an external laboratory for weathering resistance. Reports can be provided to customers upon request.
Increasingly, retailers and brand owners require packaging materials with measurable recycled content. Yuhong offers a stretch film that combines post-consumer recycled (PCR) polyethylene with virgin LLDPE resin. The blend is designed to maintain the tensile, elongation, and cling characteristics required for industrial pallet wrapping while reducing the consumption of virgin plastic.
The recycled content ratio can be adjusted between 10% and 30% depending on the end-use requirements. Higher ratios may be possible for certain applications after technical review.
| Parameter | Typical Value | Test Method / Reference |
|---|---|---|
| Recycled content | 10%–30% PCR | Supplier declaration |
| Tensile strength (MD) | ≥20 MPa | ASTM D882 |
| Elongation at break | ≥300% | ASTM D882 |
| Puncture resistance | ≥1.5 N | Internal method |
| Thickness | 17–23 μm | Standard range |
The film is used by logistics companies and manufacturers that need to report packaging sustainability metrics. A European retail supplier adopted 20% PCR stretch film for export pallets and included the material declaration in its annual sustainability report. The customer confirmed that wrapping performance was comparable to standard film, with no increase in film usage or breakage.
For each order, Yuhong provides a recycled content declaration and batch production records. Where required, third-party verification of PCR content can be arranged.
All three specialty stretch films are produced under the company's ISO 9001:2015 quality management system. Inspection stages include:
Compliance documents including EU RoHS test reports and GALAB SOI performance certificates are available for applicable products. Technical data sheets and batch test records can be provided to support customer qualification and audit requirements.
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