Machine Pre Stretched Film

Machine Pre Stretched Film is a factory-stretched LLDPE film produced by Yuhong for use on automated pallet wrapping lines. The film is oriented to a fixed ratio during production and then wound into rolls. This process reduces the pulling force required at the point of application, which lowers the mechanical load on the wrapper's tensioning and drive components.

Yuhong is a stretch film manufacturer in Xiamen, China, operating since 2008. The production facility covers 3,000 m² and has an annual capacity of approximately 5,000 tons. The company participated in drafting the Chinese industry standard QB/T 5687-2022 for pre-stretched polyethylene film for packaging.

Product Features

• Reduced equipment load: Factory pre-stretching lowers the tension demand on wrapping machine carriages, bearings, and motors compared with conventional stretch film applied at full stretch ratio on site.
• Uniform wrap tension: The film is stretched at a controlled ratio during manufacturing, which helps maintain consistent tension during wrapping and reduces sensor errors on automated lines.
• Puncture resistance at lower gauge: The film contains metallocene LLDPE. This provides higher puncture and tear resistance than standard LLDPE film of the same finished thickness.
• Material reduction: Because the film is already pre-stretched, users can secure pallet loads with less film by weight. This supports material cost reduction and waste control.
• Machine compatibility: The Machine Pre Stretched Film is produced in standard roll sizes and fits turntable, rotary arm, and orbital wrapping equipment.

Application Selection Guide

The table below lists recommended film specifications for common load profiles. Actual selection should be confirmed with Yuhong technical staff based on machine model and pallet conditions.

Technical Parameters

Material and Production Process

The energy saving stretch film is manufactured from a blend of LLDPE and metallocene polyethylene. The metallocene component improves puncture resistance and tear strength, allowing lower finished gauges to be used. A multilayer co-extrusion process combines cling, strength, and slip properties in one film structure.

Yuhong participated in drafting the Chinese industry standard QB/T 5687-2022 for pre-stretched polyethylene film for packaging. Production includes online thickness monitoring and precision slitting. The pre-stretch ratio is applied during winding and remains stable throughout the roll.

Quality Control and Compliance

Each production batch is tested for thickness variation, tensile strength, puncture resistance, and roll edge quality. Core batch codes are printed for traceability and link to production records. The low tension machine stretch wrap is also tested under simulated high-speed wrapping conditions before shipment.

The production facility is ISO 9001:2015 certified. EU RoHS test reports and third-party performance certifications are available for export orders.

Packaging and Shipping

• Each roll is sealed in a polyethylene sleeve to prevent moisture and dust ingress.
• Rolls are packed in export-grade cartons with internal protection for cores and edges.
• Bulk orders are palletized and secured with strapping.
• Waterproof outer woven bags are available for shipments through humid regions.
• Loading photos are provided before shipment for order confirmation.

Storage Recommendations

Store rolls in a dry, clean area at 5°C to 30°C, away from direct sunlight and heat sources. Avoid stacking pallets too high to prevent core deformation. Under proper storage, the film retains its pre-stretch characteristics for 12 months.

Frequently Asked Questions

1. How does factory pre-stretching differ from machine pre-stretching on site?

Factory pre-stretching is performed during film production and winding. The film is stretched to a fixed ratio, then wound under controlled tension. On-site machine pre-stretching is done by the wrapper's powered rollers. Factory pre-stretched film reduces the tension demand on the wrapper and provides more consistent stretch from the start of the roll to the end.

2. Will pre-stretched film work with my existing wrapper settings?

In most cases, yes. You may need to adjust the wrapper's tension and pre-stretch settings because the film is already partially stretched. Yuhong technical staff can provide recommended starting parameters based on your machine model and pallet type.

3. Is the film thinner than standard stretch film but still strong enough?

The film is produced at lower finished gauges, but the metallocene LLDPE blend provides comparable or better puncture and tear resistance than thicker standard films. The application guide lists puncture resistance values for each gauge. For heavy or sharp loads, select a thicker gauge or consult Yuhong.

4. Can this film be used in cold storage or freezer environments?

The pre stretched film for wrappers can be used in cold environments, but cold-resistant grades are recommended for temperatures below -10°C. The standard pre-stretched film remains functional in refrigerated conditions above freezing. For freezer applications, Yuhong offers a cold-resistant pre-stretched variant.

5. How should I store unused rolls to maintain performance?

Store rolls in original packaging in a dry, cool area. Avoid direct sunlight, high humidity, and temperatures above 30°C. Do not stack pallets more than three high to prevent core damage. Under these conditions, film properties remain stable for up to 12 months.

6. Can I get a sample roll for testing on my wrapping line?

Yes. Sample rolls are available. Provide your pallet dimensions, average load weight, machine model, and current film specifications. Yuhong will send a suitable sample for evaluation. Shipping cost for samples can be applied to the first bulk order.