LDPE Shrink Roll for Automated Production Lines

We deliver LDPE shrink film rolls engineered for automated packaging lines, featuring precise dimensions and perfectly even winding to ensure seamless compatibility with your equipment.Unlike preformed shrink bags, the key advantage of film rolls lies in their on-machine reliability. Consistent unwinding from start to finish, free of tracking issues and blocking, directly improves production efficiency and reduces scrap rates.

Furthermore, strict control over dimensional accuracy and process consistency is maintained throughout the production process.Every roll is rigorously inspected for core ID, edge straightness, winding density and film thickness uniformity to ensure optimal performance with your packaging machinery, supporting efficient, uninterrupted production.

Our LDPE shrink rolls are manufactured strictly in accordance with industrial-grade standards, compatible with various automated packaging systems, and represent an ideal solution for large-scale, continuous packaging production.

Core Advantages of our LDPE Shrink Roll

1. Core Precision: ±0.5mm Tolerance, Ensuring Perfect Alignment With The Equipment Shaft Core

The compatibility between the inner diameter of the bobbin core and the equipment shaft directly affects unwinding stability.

Standard size: 3 inches (76 mm)

Custom Specifications

Can be customized according to your device shaft diameter.

Tolerance Control

Inner diameter tolerance ≤±0.5mm to ensure the membrane does not wobble or slip after installation.

Core Material

High-strength paper tube, resistant to deformation under compression, ensuring roundness during transportation and use.

The quality of coil winding determines the unwinding performance of the membrane after installation on the machine.

Closed-Loop Tension Control

Real-time monitoring and adjustment of winding tension to ensure uniform tension across the entire coil from the outer to inner circle.

End Face Flatness

deviation ≤±1.5mm, no wavy edges or misalignment layers.

Non-Adhesive Design

Proper tension during winding to prevent adhesion between film layers, ensuring smooth unwinding.

Rolling Direction Options

Choose between inward or outward based on device requirements.

Uneven thickness is a common cause of membrane rupture and poor shrinkage effect.

Multilayer Co-Extrusion Process

Ensuring uniform thickness distribution of the membrane material in both transverse and longitudinal directions.

Online Thickness Gauge

Real-time thickness detection records are available for each film roll.

Total Roll Deviation ≤±5%

High thickness consistency from the start to the end of the roll.

Reduced Film-Breaking Rate

Uniform thickness ensures more stable heat sealing and shrinkage performance.

The joint is the weak point of the coil and a common cause of production line downtime

Conventional Coil

≤2 joints per coil, with joints secured by ultrasonic welding or tape overlap, exhibiting strength comparable to the base material.

Joint identification

The joint position is marked with color codes for easy preparation by operators.

Seamless roll option

For high-speed continuous production lines, a custom seamless roll solution can be implemented to ensure uninterrupted packaging.

Product Parameters Overview

Parameter term	Specification range	Explain
Material quality	LDPE (Low-density polyethylene)	Optional food-grade, anti-static grade, eco-friendly recycled material
Thickness	0.03mm – 0.20mm	Total roll thickness deviation ≤±5%
Membrane width	50mm – 3000mm	Can precisely match according to the device sealing width
Volume length	1000m – 3000m	Customized to production rhythm, reducing reel change frequency
Inner diameter of core	3 inches (76 mm)	Tolerance ≤±0.5mm
Core material	High-strength paper tube	High compressive strength with no deformation
Maximum coil diameter	≤400mm	Optimize reel space for standard packaging machines
End face deviation	≤±1.5mm	Ensure stable unwinding trajectory
Number of joints	≤2 per roll (standard)/0 (custom without splicing)	Color-coded marking at the joint
Shrinkage temperature	150℃ – 180℃	Compatible with various shrinkage equipment including hot air and infrared devices
Surface preparation	Single-sided/bilateral corona treatment	Enhancing Printing Adhesion
Antistatic	Selectable	Surface resistivity ≤10¹¹Ω

shrink film types

Single Wound Film

Folded film

cylindrical membrane

Industrial-Grade LDPE Shrink Film vs. Standard Shrink Film: Key Differences

Contrast item	Standard LDPE shrink film	Our Industrial-grade LDPE shrink film
Inner diameter tolerance of core winding	±1mm – ±2mm	≤±0.5mm
End face deviation	±3mm – ±5mm	≤±1.5mm
Rolling tension control	Simple tension, which may present with inner looseness and outer tightness	Closed-loop constant tension with uniform tension across the entire coil
Thickness uniformity	No online detection, significant thickness variation	Real-time thickness measurement, overall roll deviation ≤±5%
Joint treatment	Conventional splicing with low strength	Joint reinforcement + color-coded labeling, optional joint-free design
Electrostatic proecss	Usually absent	Optional antistatic treatment
Computer performance	Repeated debugging may be required	Ready-to-use upon loading, stable unrolling

Applicable device type

Our LDPE shrink film rolls are widely compatible with the following types of equipment:

Sleeve Wrapping Machine

Single-Sheet Wrapping Machine

L-Sealer

Fully Automatic Horizontal Shrink Packaging Machine (Lantech, Shanklin, Mainstream Domestic Models)

Semi-automatic L-type sealing machine (with heat shrinkage oven)

High-speed Hot Air Circulation Shrinkage Furnace

Infrared shrinkage device

We can provide precise coil parameter matching recommendations based on your equipment model, shaft core specifications, and sealing method.

Application Industries And Typical Scenarios

Trade	Typical Applications	Recommended thickness
Food and beverage	Mineral water multi-pack, beverage bottle bundles, frozen food trays	0.06mm – 0.08mm
Daily chemical product	Combined packaging of shampoo bottle, laundry detergent bottle, and wet wipe box	0.05mm – 0.07mm
Electronic product	High-speed packaging for batteries, chargers, and phone cases	0.04mm – 0.06mm
Pharmaceutical packaging	Medicine boxes, health product bottles, medical device trays	0.05mm – 0.07mm (food-grade)
Hardware industry	Bears, tools, automotive parts	0.08mm – 0.12mm (Enhanced)
E-commerce logistics	Group packaging of multiple items and pallet wrapping protection	0.06mm – 0.10mm

Why Choose Us as Your LDPE shrink film rolls Supplier?

High-Precision Dimensions

Core inner diameter tolerance ≤±0.5mm and end face runout ≤±1.5mm for accurate machine fit and easy installation.

Stable Winding Performance

Closed-loop constant tension control ensures even tension across the roll, reducing offset, wrinkling, and misalignment during unwinding.

Consistent Thickness

Online thickness monitoring helps keep finished roll thickness deviation within ≤±5% for stable packaging performance.

Precision cutting

perfectly flat edges; Smart rewinding with constant tension, building a solid quality foundation for your packaging process.

Flexible Supply Capacity

With raw material stock and in-house production, we support sample orders, trial runs, and stable bulk delivery.

Professional Technical Support

Remote debugging guidance and customized solutions are available to help solve production issues quickly.

Wide Equipment Compatibility

Suitable for most mainstream automatic shrink packaging systems with no extra machine modification required.

Efficient Global Delivery

Standardized packaging and reliable logistics partners help reduce transit damage and support on-time worldwide delivery.

Get samples and quotes

We offer two sample acquisition methods to help you verify the compatibility between the roll material and production line before procurement

Existing specification roll samples for in-machine testing of unwinding stability, shrinkage effect, and heat seal strength (shipping fee payable).

Custom Samples

Create custom roll samples based on your equipment parameters (core inner diameter, film width, roll length). Confirm the results before mass production.

Submitting a Inquiry

Please provide the following information to enable us to deliver precis recommendations and quotesPackaging equipment brand and model (or core inner diameter, film width requirements).

Special Requirements

Estimated monthly usage (tons/rolls)Are special requirements such as antistatic treatment or seamless winding necessary?Is there a need for export environmental certification.

Customization Process

Size

Proofing

Drawing

Customized Services

Goods Receipt Confirmation

After-sale Services

FAQ

Q: Why is the inner diameter tolerance of the core in LDPE shrink film rolls important? What is your tolerance value?

A: If the inner diameter of the core does not match the equipment shaft, two issues may arise:
Excessive inner diameter: The membrane material slips on the shaft core, resulting in unstable uncoiling tension and deviation of the film material.
Insufficient inner diameter: The roll material cannot be installed or installation is difficult.
The inner diameter tolerance of our spool core is controlled within ±0.5mm to ensure tight fit with the equipment shaft, preventing any wobbling or slipping during installation and ensuring stable unwinding performance.

Q: What is "end face deviation"? Why does it affect unwinding?

A: End face deviation refers to the difference in flatness between the two end faces of the roll material. If the end face deviation is excessive (e.g., exceeding ±3mm), the roll material may sway during unwinding, leading to film misalignment, offset sealing positions, or even film jamming and machine shutdown. Our end face deviation is controlled within ±1.5mm, ensuring stable unwinding trajectory and eliminating the need for repeated equipment adjustments.

Q: What is a "jointless coil" and when is it required?

A: "Joint-free roll" refers to a continuous film material roll with no splicing points from end to end. Conventional rolls typically have 2-3 joints due to reel changes or material switching during production. For high-speed continuous packaging lines (e.g., over 60 packages per minute), these joints may lead to:
The device automatically shut down and requires manual film retrieval.
Fracture at the joint site resulting in production line interruption.
Uneven thickness at the joint affects shrinkage performance.
The selection of jointless rolls enables continuous packaging, making it suitable for high-load and high-efficiency production lines.

Q: How to determine whether the winding tightness of the roll material is appropriate?

A: The roll-up tightness should be moderate:
Over-tightened: Severe adhesion between membrane layers results in high resistance during unwinding, leading to easy stretching deformation or rupture.
Excessive loosening: The membrane is prone to loosening and misalignment during transportation or unwinding.
Our closed-loop constant tension winding process ensures uniform tightness across the entire roll, smooth unwinding without sticking, and prevents loosening during transportation. You may request sample testing on the machine to visually assess the unwinding performance.

Q: How to ensure compatibility between the membrane and my equipment before bulk procurement?

A: We recommend validation through sample testing:
Provide device information: Tell us your device brand, model, and shaft core inner diameter. We will recommend the closest available specifications.
Free sample testing: Test the existing specification roll samples on your machine to evaluate unrolling smoothness and shrinkage effect.
Custom sample verification: If the existing specifications do not fully match, small-batch customized roll samples can be produced.
After testing confirms satisfaction, we will proceed with batch production using the confirmed parameters to ensure peace of mind. We also offer remote video guidance to assist you with system debugging.

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