September 21, 2026
Cotton Wrap Film Specifications – Thickness, Width, and UV Protection Explained
Table of Contents
Introduction
Thickness – The Foundation of Strength and Protection
Width – Matching the Film to the Machine
UV Protection – Preserving Quality in the Field
Additional Performance Specifications
Conclusion
Frequently Asked Questions (FAQ)
1. Introduction
Cotton wrap film is a specialized agricultural packaging material designed to protect freshly harvested cotton modules from moisture, dirt, pests, and UV radiation during field storage, handling, and transport. Unlike general-purpose stretch films, cotton wrap must withstand harsh outdoor conditions, resist punctures from cotton stems and debris, and maintain its integrity through temperature swings from -20°C to 60°C.
The film is applied immediately after picking by modern cotton harvesters, forming a tight, weatherproof barrier around each module. It keeps the cotton clean and dry until it reaches the gin, preserving fiber quality and market value.
Three specifications define the performance of cotton wrap film: thickness, width, and UV protection. Each directly impacts how well the film protects the cotton, how efficiently it feeds through the wrapping machinery, and how long the module can be stored outdoors. This review examines these three key specifications.
2. Thickness – The Foundation of Strength and Protection
Thickness is the most fundamental specification for cotton wrap film. It determines puncture resistance, tensile strength, and the film's ability to withstand the mechanical stress of wrapping, handling, and transport.
Standard Thickness Values
The industry standard for cotton wrap film is typically 75 to 80 microns (0.075 to 0.08 mm). This is the thickness used by most major manufacturers for cotton harvesting applications.
Manufacturer | Thickness | Unit |
Jummos / Silopak | 75 μm | 8†L48 |
EZEWRAP | 80 μm | 9†L13 |
Upass | 75-80 μm | 11†L9 |
Agrishade | 75 μm | 10†L45 |
Some suppliers offer a wider range. PE cotton wrap film is available in thicknesses from 60 to 100 microns, and heavier-duty applications may require 120 to 250 μm.
Why Thickness Matters
Puncture resistance. Thicker film provides better resistance to punctures from cotton stems, sticks, and other debris that can compromise the barrier. The puncture resistance specification for cotton wrap film is typically ≥4 N.
Tensile strength. Thickness directly affects tensile strength. High-quality cotton wrap film achieves tensile strength of ≥30 MPa in both machine direction (MD) and transverse direction (TD). Thinner films may tear easily during wrapping or transport.
Mechanical durability. The film must withstand the mechanical stress of cotton baling and transportation. High-quality films should exhibit strong tensile strength (≥20 MPa) and high elongation (≥250%). Premium films achieve elongation at break of 650% or more.
Cost vs. performance trade-off. Thicker film provides better protection but increases material cost and roll weight. A 75 μm film on a 100 kg roll is the industry standard, balancing protection with practical handling.
Thickness Uniformity
Consistent thickness across the film width is as important as the nominal thickness value. Inconsistent thickness creates weak spots that can tear during wrapping. A quality film should maintain uniform thickness, with variation no more than ±0.005 mm.
3. Width – Matching the Film to the Machine
The width of cotton wrap film must match the wrapping machinery. Standard widths are designed to fit the most common cotton picker models, particularly John Deere CP690 and CP770 harvesters.
Standard Width Values
Width (mm) | Width (in) | Common Application |
2,700 mm | 106 in | Standard width for most cotton pickers |
2,210 mm | 87 in | Alternative width for specific models |
The 2.7 m width is the most common specification. It is the standard for Jummos, EZEWRAP, Agrishade, and Upass cotton wrap films.
Width Customization
Many manufacturers offer width customization to meet specific requirements. Upass offers widths from 2,210 mm to 2,700 mm. The width range can extend from 2,200 mm to 2,700 mm, and some suppliers can accommodate widths up to 3,000 mm.
Why Width Matters
Machine compatibility. The film width must match the specifications of the cotton module wrapping machine. Incorrect width causes misalignment, waste, and downtime.
Edge coverage. Proper width ensures full coverage of the cotton module edges, preventing moisture ingress and cotton scattering.
Roll configuration. The standard roll configuration for cotton wrap film is: 2.8 m core length, approximately 100 kg roll weight, with 24 pre-cut wrap portions per roll. The 24 portions per roll are designed to feed correctly during the automated wrapping process.
4. UV Protection – Preserving Quality in the Field
Cotton modules are often stored in the field for extended periods after harvesting. Direct sunlight degrades unprotected plastic films through UV radiation, causing embrittlement, cracking, and loss of protective properties. UV protection is therefore a critical specification for cotton wrap film.
How UV Protection Works
Cotton wrap film is formulated with UV stabilizers that absorb or block harmful UV radiation. The light stabilizers, such as BASF's Tinuvin 494 AR, act as excellent UV stabilizers and also ensure resistance to crop protection chemicals.
High-density polyethylene (HDPE) cotton wrap film with UV stabilization provides superior protection for industrial cotton bales, ensuring long-term outdoor storage. The film combines high tensile strength with a flowable multilayer structure to maximize durability.
UV Protection Duration
The best cotton wrap films offer UV protection rated for 12 to 18 months of outdoor storage. This duration ensures that bales stored in open fields or under tarps remain protected through the storage season.
UV Protection Rating | Typical Duration | Application |
Standard | 6-12 months | Short-term field storage |
High | 12-18 months | Long-term outdoor storage |
Extended | 18+ months | Extended field storage, harsh conditions |
Why UV Protection Matters
Prevents film degradation. Unprotected film becomes brittle and cracks under UV exposure, compromising the moisture barrier.
Protects cotton quality. The film shields cotton from harmful UV rays that can degrade fiber quality.
Maintains structural integrity. UV-stabilized film maintains its strength and flexibility throughout the storage period, ensuring the module stays intact.
Reduces storage losses. A degraded wrap allows moisture, dirt, and pests to penetrate the module, reducing the cotton's market value.
UV Stabilizer Technology
Modern cotton wrap films use advanced UV stabilizer formulations. BASF offers Tinuvin NOR 211 AR as an effective value solution for agricultural plastics exposed to intense UV radiation, high heat, and severe agrochemical attack. These stabilizers are incorporated into the film during extrusion, providing long-lasting protection throughout the film's service life.
5. Additional Performance Specifications
Beyond the three core specifications, cotton wrap film must meet several other performance criteria.
Adhesion Properties
Cotton wrap film uses a special adhesive system. The outer layers are tacky on one side only, while the inner layers are non-tacky to prevent cotton from sticking to the wrap. This combination ensures the round module holds its uniformity for transport and processing.
The film provides steady adhesion that stays firmly attached to cotton bales during handling and transport, yet it peels off easily without leaving residue.
Mechanical Properties
Property | Typical Value | Standard |
Tensile Strength (MD) | ≥30 MPa | 11†L29-L30 |
Tensile Strength (TD) | ≥30 MPa | 11†L29-L30 |
Elongation at Break (MD) | ≥650% | 11†L30-L31 |
Elongation at Break (TD) | ≥550-650% | 11†L30-L31 |
Tear Strength (MD) | ≥80 kN/m | 11†L32 |
Tear Strength (TD) | ≥100 kN/m | 11†L31 |
Temperature Resistance
Cotton wrap film must withstand the temperature extremes of the field. Typical operating range is -20°C to 60°C. Some products offer extended ranges from -35°C to 75°C.
Puncture Resistance
The film must resist punctures from cotton stems and debris. Typical puncture resistance is ≥4 N. High-performance films offer enhanced puncture resistance through multi-cross extrusion technology.
6. Conclusion
Cotton wrap film specifications are defined by three critical parameters: thickness, width, and UV protection.
Thickness is the foundation of strength and puncture resistance. The industry standard is 75 to 80 microns, balancing protection with cost and handling. Thicker films provide better durability but increase material costs.
Width must match the wrapping machinery. The standard width is 2.7 m (106 in), with 2.21 m (87 in) as an alternative. Custom widths are available from most manufacturers.
UV protection is essential for field storage. High-quality films offer 12 to 18 months of UV protection, preventing degradation and preserving cotton quality through the storage season.
When selecting cotton wrap film, consider the storage duration, environmental conditions, and machine compatibility. The right combination of thickness, width, and UV protection ensures the cotton remains clean, dry, and protected from field to gin.
7. Frequently Asked Questions (FAQ)
Q: What is the standard thickness for cotton wrap film?
A: The industry standard thickness is 75 to 80 microns (0.075 to 0.08 mm). Some manufacturers offer a wider range from 60 to 100 microns.
Q: What is the standard width for cotton wrap film?
A: The standard width is 2.7 m (106 in). An alternative width of 2.21 m (87 in) is also available. Custom widths can be ordered from most manufacturers.
Q: How long does UV protection last on cotton wrap film?
A: High-quality cotton wrap films offer UV protection rated for 12 to 18 months of outdoor storage. This ensures bales remain protected through the storage season.
Q: Why is thickness important for cotton wrap film?
A: Thickness determines puncture resistance, tensile strength, and durability. Thicker film provides better protection against tears and punctures from cotton stems and debris.
Q: Can cotton wrap film be customized for specific machines?
A: Yes. Most manufacturers offer customization of width, length, and color to match specific cotton picker models and branding requirements.
Q: What temperature range can cotton wrap film withstand?
A: Standard cotton wrap film operates from -20°C to 60°C. Extended-range products are available for -35°C to 75°C.