介绍

Now that you understand 拉伸膜 materials and performance parameters, let’s dive into the packaging floor. This guide deciphers the practical terminology that directly impacts packaging results and efficiency, completing your knowledge from “understanding specs” to “mastering application.”

Category 3: Process & Form – The “Key Details” Affecting Operation

This category focuses on the physical characteristics and handling properties that directly impact packaging smoothness.

10. Machine Film vs. Hand Film

Core Definitions:

• Machine Film: Specifically engineered for stretch wrap machines. These rolls are heavier and longer, built to withstand higher mechanical pre-stretch forces.
• 手膜: Designed for manual wrapping. The rolls are lighter and smaller for comfortable handling and easier stretching.

Critical Selection Advice:

• Never interchange them!
• Hand film will likely snap in a machine
• Machine film is difficult and inefficient to stretch by hand
• YD PACK provides a complete range of both machine and hand film solutions to ensure the perfect product for every scenario

11. Neck-down

Core Definition: The narrowing of the film’s width when it is stretched.

Key Points:

• Root Cause: A natural physical behavior, but excessive neck-down indicates subpar film performance
• Packaging Impact: Reduces coverage area of each wrap layer, forcing more wraps and increasing film consumption and cost

The YD PACK Solution:
YD PACK’s advanced molecular structure control and nano 55-layer co-extrusion technology effectively minimize neck-down, maintaining optimal width even under high pre-stretch for greater packaging efficiency and material yield.

12. Wide Web Film

Core Definition: Refers to film rolls with an exceptionally large width, designed for equipment using wide-web wrapping technology.

Core Value:

• Think of painting with a wider brush—it covers a larger area faster
• Significantly reduces number of rotations needed
• Dramatically speeds up packaging of large or uniform loads
• Preferred choice for modern, high-efficiency warehouses

The YD PACK Solution:
To meet diverse equipment needs, YD PACK offers popular wide-web specifications like 750mm, helping you perfectly match high-speed wrappers for maximum packaging throughput.

13. Metallocene

Core Definition: A catalyst technology used to produce high-performance polyethylene, creating resin with more uniform and pure polymer chains.

The Performance Leap:
Stretch films utilizing metallocene technology achieve:

• Superior toughness
• Enhanced puncture resistance
• Better clarity at the same gauge

It represents the high-end direction of stretch film material science.

Category 4: Application & Operation – “In-the-Field” Execution

This category covers specific techniques, equipment, and common issues during the wrapping process, directly determining the final load’s stability and security.

14. Bottom Wraps

Core Definition: The number of film rotations the machine applies around the lower section of the palletized load.

Practical Value:

• Secure bottom wraps are the “foundation” of pallet stability
• More than one rotation effectively “locks” the load to the pallet
• Prevents base slippage during handling and transit
• Crucial first step for overall integrity

15. Top Wraps (Overwrap)

Core Definition: The extra layers of film applied over the top of the load.

Practical Value:

• Creates downward force, acting like a “film cap”
• Prevents top layers from shifting
• Effectively secures top sheets (like plastic dust covers or cardboard caps)
• Prevents protective covers from being blown off during transport

16. Roping

Core Definition: A technique where a machine attachment gathers the full film web into a strong, rope-like band before application.

Practical Value:

• Generates extremely high tensile strength
• Commonly used for additional vertical or horizontal reinforcement
• Ideal for very tall or unstable loads
• Secures loads firmly to the pallet

17. Tackifiers

Core Definition: Chemical additives incorporated during manufacturing to enhance the film’s cling property.

Practical Insight:

• More tack isn’t always better
• Consistent and appropriate cling is key
• YD PACK precisely formulates its tackifiers based on operating environment
• Ensures reliable performance in ambient warehouses or cold storage
• Prevents film loosening or excessive blocking

18. Zippering

Core Definition: This occurs when a film lacks resistance to tear propagation. A small nick in the film’s edge rapidly spreads across the entire roll width like a zipper, causing complete packaging failure.

Root Cause: Typically linked to poor tear resistance in the transverse direction (TD).

YD PACK 的优势：
This is where YD PACK’s cast film and nano 55-layer structure excel. Our superior tear resistance fundamentally eliminates the risk of “zippering,” ensuring your goods arrive safely.

Conclusion & Call to Action

You now possess the complete knowledge framework, from material science to practical packaging techniques. These terms are more than just specs—they are practical tools for achieving secure, efficient, and cost-effective packaging.

YD PACK helps you turn knowledge into tangible results.

We invite you to request a free sample and experience firsthand how a professional-grade stretch film solves your specific packaging challenges.

Continue Reading:

[10 Key Stretch Film Terms You Must Know (Part 1)] – Save Costs by Choosing the Right Material