Bundling film is a flexible, stretchable, and heat-responsive wrapping material used to secure multiple items together for easier handling, storage, and transportation. It is widely used in packaging, apparel manufacturing, electronics assembly, and logistics because it provides firm bundling strength without damaging the products it holds. Bundling film can be applied manually, with handheld tools, or through automated strapping and bundling machines. 

In industrial settings, high-performance PET bundling films—such as the ones offered in the XINYUANSHUN industrial wrapping film series—deliver strong tensile strength, reliable heat-seal properties, and stable performance for consistent bundling.

This material is essential for securing small or irregular items, improving packing efficiency, reducing waste, and ensuring that goods remain intact throughout transport. In the sections below, we explain its characteristics, how it works, where it is used, what to pay attention to, common issues, and a complete conclusion.

1. Understanding Bundling Film and Its Core Characteristics

Bundling film is made from PET or similar polymers that provide durability, clarity, and excellent holding power. The structure is designed to stretch without tearing, allowing it to wrap tightly around objects and maintain tension. Unlike traditional strapping that relies on heavy plastic bands, bundling film conforms to the shape of the product, which makes it ideal for items that are lightweight, delicate, or irregular in size.

Its most notable characteristics include:

• Strong tensile strength
  PET bundling film resists pulling forces and maintains a tight hold on packaged items. XINYUANSHUN’s PET material is engineered for high strength and long-lasting grip.

• Excellent heat seal performance
  The film responds well to heat during machine bundling, forming secure seals that prevent loosening during transportation.

• Flexibility and adaptability
  It conforms to product surfaces more easily than rigid strapping, making it suitable for both flat and curved goods.

• Lightweight and easy to handle
  Compared with traditional strapping belts, bundling film minimizes packaging weight and simplifies disposal after use.

• Availability in multiple widths and thicknesses
  Common industrial widths include 20 mm and 30 mm—two widely used specifications in automated bundling equipment.

These features allow bundling film to replace bulkier strapping materials while improving packaging consistency and production efficiency.

2. How Bundling Film Works in Different Application Scenarios

Bundling film functions by wrapping and compressing products, using either manual force or machine tension to tighten around the items being bundled. Once wrapped, the film clings to itself or is heat-sealed, depending on the equipment used. Because pet film maintains elasticity and bonding strength, it continues applying pressure to secure goods throughout the packaging process.

Bundling film is commonly used in industries such as:

• Packaging and logistics
  For grouping small boxes, stationery, printed goods, or bottle sets. It keeps items from shifting and reduces the need for cartons.

• Apparel and textile industry
  Used to bundle clothing stacks, fabric rolls, garment components, or accessory packs prior to shipment.

• Electronics and precision parts
  Bundles circuit components, cables, connectors, and small accessories in a neat, controlled manner.

• Manufacturing and assembly lines
  Ensures consistent item grouping for automated production and improves workflow efficiency.

• Retail preparation
  Bundles multipack items for display, reducing packaging costs while keeping products visually neat.

XINYUANSHUN’s bundling film is designed specifically for bundling machines, ensuring stable performance under continuous operation. Since customers can customize the width and thickness of the film, it is suitable for tailored production lines with specific tension requirements.

3. Why PET Is an Ideal Material for High-Performance Bundling Film

PET (polyethylene terephthalate) is the most commonly used material for bundling film because of its combination of strength, heat-sealing capability, and cost-efficiency. Its physical properties make it superior to many other plastics used in industrial packaging.

Key advantages of PET bundling film include:

• High tensile strength and resistance to tearing
  PET allows tighter bundling without breaking. This ensures goods remain secure during long-distance transport or high-speed assembly.

• Heat-seal capability
  PET melts consistently under controlled heat, forming strong bonds in strapping machines.

• Low stretch memory
  Once bundled, PET maintains consistent tension instead of loosening over time.

• Moisture and chemical resistance
  Ideal for warehouses, shipping environments, and factories where humidity, oils, or dust are present.

• Lightweight alternative to rigid strapping belts
  Reduces packaging weight and material cost while offering similar holding capability.

Below is a simple comparison table to help users understand PET bundling film advantages:

XINYUANSHUN uses premium PET raw material and manufacturing controls to ensure that each roll of bundling film remains consistent in thickness, seal strength, and performance during machine application.

4. What to Pay Attention to When Using Bundling Film

Proper use of bundling film ensures consistent packaging quality, machine compatibility, and product protection. Whether bundled manually or by automation, several precautions help optimize results.

Important considerations include:

• Matching the correct width and thickness to your machine
  Most bundling machines use 20 mm or 30 mm PET bundling film. Using incorrect dimensions may cause machine jamming or weak seals.
  XINYUANSHUN offers custom-width materials for customers requiring non-standard formats.

• Ensuring clean and smooth sealing surfaces
  Dust, oils, or fabric lint can affect the heat-sealing process.

• Avoiding excessive tensioning
  While PET is strong, improper machine settings can overstress the film and create unnecessary waste.

• Storing film in dry, moderate-temperature environments
  High heat or humidity can affect film flexibility and sealing response.

• Making sure products being bundled are aligned
  Misalignment can cause uneven pressure distribution and reduce bundling stability.

• Inspecting machine blades and heating plates regularly
  Worn elements can reduce sealing strength and increase material consumption.

When used correctly, PET bundling film maintains clean, tight, and professional bundling results with minimal material usage.

5. Common Issues and How to Solve Them

Although bundling film is reliable, users may occasionally encounter difficulties related to machine settings, environmental factors, or film quality. Understanding these issues helps ensure efficient workflow.

Typical problems include:

• Weak heat-seal bonds
  Caused by low sealing temperature, contaminated sealing surfaces, or incorrect film thickness. Increasing temperature or cleaning the machine area often solves the issue.

• Film breaking during bundling
  Usually caused by excessive tension or very sharp product edges. Adjusting tension or adding a protective layer helps prevent tears.

• Static electricity buildup
  High-speed operations can create static, causing film to cling unevenly. Anti-static treatments or grounding the machine reduces this.

• Film curling or uneven feed
  Often caused by humidity changes or improper storage. Keeping bundling film in stable conditions prevents warping.

• Machine not detecting the film properly
  Dirty sensors, low-opacity material, or misalignment may be the cause. Cleaning sensors and verifying alignment helps ensure smooth operation.

• Shrinkage or tightness inconsistency
  Caused by unstable heating or tension controls. Calibration usually solves it.

XINYUANSHUN’s bundling films undergo strict quality control to maintain stable thickness, smooth rolling, and excellent heat-sealing behavior, significantly reducing the occurrence of these issues.

Conclusion

Bundling film is a versatile, durable, and cost-effective material widely used across industries to secure, group, and protect products. Its strong tensile performance, heat-seal capabilities, and adaptable structure make it indispensable for packaging lines, apparel manufacturing, electronics assembly, and multipack preparation.

Choosing high-quality PET bundling film ensures better machine performance, fewer packaging errors, and stronger bundling stability. The XINYUANSHUN bundling film series provides customizable widths, excellent sealing strength, and reliable PET material that meets the needs of modern factories. With correct usage, proper storage, and regular machine maintenance, bundling film offers consistent and professional packaging results, helping businesses reduce waste, improve efficiency, and keep products securely bundled throughout the supply chain.