Product Core Parameters Overview

Parameter term	Specification range	Explain
Material quality	LDPE (Low-density polyethylene)	Optional food-grade, anti-static grade, eco-friendly recycled material
Width	50mm – 3000mm	Match precisely by device sealing width
Thickness	0.03mm – 0.20mm	Recommendations can be optimized based on product weight
Volume length	1000m – 3000m	Customized to production rhythm, reducing reel change frequency
Inner diameter of core	3 inches (76 mm)	Must match the equipment shaft center
Maximum coil diameter	≤400mm	Optimize reel space for standard packaging machines
End face deviation	≤±1.5mm	Ensure stable docking of the automatic film transfer device
Number of joints	≤1 per roll (standard)/0 (custom without splicing)	Jointless coils are suitable for high-speed continuous production lines
Shrinkage temperature	150℃ – 180℃	Compatible with various shrinkage equipment including hot air and infrared devices

Potential issues with ldpe shrink wrap film and solutions

Focus dimensions	Possible issues	Our response
Core matching	Is the inner diameter of the core perfectly matched with the shaft core of my equipment?	Supports 3-inch, 6-inch, and custom non-standard sizes, with core size confirmation service provided.
Unwinding stability	Will the coil material deviate, stick together, or break during unwinding?	Constant tension winding + end face flatness control ensures smooth unwinding of the entire coil
Number of joints	How many joints are there in one coil? Are the joints prone to fracture?	Single coil conventional ≤2 joints, customizable jointless coils available, with reinforcement treatment at joint locations
Thickness uniformity	Is the film thickness uniform? Could localized thinning lead to membrane rupture?	Online thickness detection, with overall roll thickness deviation ≤±5%
Electrostatic influence	Does static electricity affect the opening and adsorption of automatic packaging machines?	Optional antistatic treatment to reduce intermembrane adsorption force
Supply stability	Can the supply be maintained stably over the long term? Is the delivery schedule reliable?	Raw material inventory + self-owned production capacity, supporting batch delivery to ensure continuous supply

Why does the quality of LDPE shrink film directly impact your packaging costs?

In automated packaging production, downtime costs caused by roll material issues far exceed the price of the film material itself. A single shutdown due to roll material misalignment or joint fracture may result in:

1. Production line suspension, manual intervention

2. Sealed products are scrapped

3. Backlog of subsequent processes

Our LDPE shrink rolls focus on coiling process and dimensional accuracy, prioritizing "machine stability" as the primary quality indicator to help you reduce hidden costs.

Key Advantages of our LDPE Shrink wrap for Industrial Packaging

1. The winding tightness is moderate, and the unwinding does not deviate from the path

Closed-loop tension control system: Real-time monitoring and adjustment of winding tension to ensure consistent tension from the outer ring to the inner ring of the entire coil.

End face flatness ±1.5mm: Avoid uncoiling vibration caused by uneven end faces

Waveless edge: The membrane surface is smooth, reducing lateral displacement during unwinding.

2. Equipment for precise matching of core length and coil diameter

Inner diameter tolerance of the core ≤±0.5mm: Ensure tight fit between the core and the equipment shaft core to prevent slippage or wobbling.

Roll diameter control: The maximum roll diameter can be customized based on the equipment's spool space to prevent installation issues caused by oversized rolls.

3. Optimization of joint processing technology

Joint reinforcement: Ultrasonic welding or tape overlap is employed, with joint strength approaching that of the base material.

Clear joint identification: The joint position is clearly marked with color codes to facilitate operator preparation in advance.

Seamless roll option: For high-speed production lines, we offer a seamless whole-roll solution to ensure uninterrupted packaging.

4. Uniform thickness reduces the risk of membrane rupture

Multilayer co-extrusion blow film process: Ensuring uniform thickness distribution of the film material in both transverse and longitudinal directions

Real-time monitoring by online thickness gauge: Each coil has thickness detection records, with overall thickness deviation ≤±5%.

Reducing film breakage: Uniform thickness ensures stable heat sealing and shrinkage performance, thereby minimizing production losses.

5. Anti-static and Open Surface Treatment

Optional antistatic coating: surface resistivity ≤10¹¹Ω, reducing electrostatic adsorption

Openness optimization: Addition of opening agents to the film surface to prevent interlayer adhesion and improve the success rate of automatic packaging and film retrieval

Core differences from conventional shrink wrap

Contrast item	Conventional LDPE shrink wrap roll	This product (Stable Supply Type Shrink Wrap)
Rolling tension control	Simple tension, which may present with inner looseness and outer tightness	Closed-loop constant tension with uniform tension across the entire roll
End face accuracy	±3mm – ±5mm	Within ±1.5 mm
Joint treatment	Conventional splicing with low joint strength	Joint reinforcement + color-coded labeling, optional joint-free design
Thickness uniformity	No online detection, significant thickness variation	Real-time thickness measurement, overall roll deviation ≤±5%
Antistatic treatment	Usually absent	Optional, enhances openness
Supply guarantee	Unstable delivery schedule	Raw material inventory management with batch delivery support

Applicable device type

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

Equipment application

PE Sleeve Packaging Machine

One-Piece PE Shrink Wrapper

Hand Shrink

Application Industries And Typical Scenarios

Beverage packaging

Daily chemical product

Pharmaceutical packaging

E-commerce logistics

Supply Assurance and Service Commitment

Raw material inventory: Year-round stockpiling of commonly used LDPE raw materials to ensure production continuity

Flexible order placement: Supports small-batch customization and sample production, with bulk orders delivered in batches

Transparent delivery timeline: Standard specifications require 7-15 days for delivery, while customized specifications take 20-25 days.

After-sales response: If compatibility issues occur during setup, remote video guidance will be provided, and alternative solutions will be sent if necessary.

Get samples and quotes

We offer two sample collection methods to help you verify the compatibility between the roll material and equipment before procurement.

Free sample available

Existing specification roll samples for machine testing of unwinding stability and shrinkage effect (shipping fee payable upon delivery)

Custom samples

Produce small batches of customized rolls based on your equipment specifications. Confirm accuracy before mass production (material costs will be charged).

To provide a fast and accurate quotation for your LDPE shrink wrap rolls, please share the following details:

1. Packaging Equipment Specifications

Equipment brand and model, or core inner diameter and required film width, to ensure perfect machine compatibility.

2. Product Dimensions & Weight

Size and weight of the packaged products, helping us recommend optimal film thickness and strength.

3. Estimated Monthly Consumption

Projected usage volume to optimize production planning and offer more competitive pricing.

4. Special Technical Requirements

Indicate if you need antistatic treatment, seamless (joint-free) rolls, or other customized specifications.

FAQ

Q: What is the difference between LDPE shrink rolls and LDPE shrink bags? How should I make a choice?

A: LDPE shrink rolls are continuous feed rolls that require coordination with automated packaging machines to complete the entire process of bag formation, filling, sealing, and shrinkage, making them suitable for large-scale automated production. LDPE shrink bags, on the other hand, are pre-formed bags ideal for manual packaging or small-batch production. If your production line is automated, shrink rolls offer higher efficiency; for manual packaging scenarios, shrink bags provide greater convenience.

Q: Why is the inner diameter tolerance of the core important? What is your tolerance value?

A: If the inner diameter of the core is excessively large, the coil will slip on the equipment shaft, resulting in unstable unwinding tension; if it is too small, installation becomes impossible. Our core inner diameter tolerance is controlled within ±0.5mm to ensure tight fit with the equipment shaft, preventing vibration and slippage.

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

A: "Joint-free rolls" refer to film materials that have no splicing points from end to end. Conventional rolls may have 2-3 joints due to reel or material changes during production. For high-speed continuous packaging lines (e.g., over 60 packages per minute), joints may cause equipment shutdown or manual intervention. Selecting joint-free rolls enables uninterrupted production, making them suitable for high-load production lines.

Q: Is LDPE shrink film suitable for food packaging? What certifications are available?

A: Yes. We provide food-grade LDPE shrink rolls manufactured from raw materials compliant with FDA 21 CFR 177.1520 and EU 10/2011 standards, suitable for direct contact with frozen meats, baked goods, fruits, vegetables, etc. The products also meet RoHS and REACH environmental requirements.

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

A: We recommend verifying compatibility through sample testing. Please provide device parameters and product dimensions, and we will recommend the closest matching specifications for in-machine testing. If existing specifications do not fully align, custom samples can be fabricated for validation. After confirming smooth unwinding and satisfactory shrinkage performance, proceed with bulk procurement to ensure peace of mind.

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