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Why Do Film Rolls Develop “Bulges” During Winding?
Description: Roll bulging (“bagging” or “bubble” in wound film rolls) is a common but costly defect that originates from uneven internal stress distribution in the roll. It typically appears only after winding, unwinding, or delivery — making it a “silent” production killer. This paper analyze...Read more -
Stretch Film “Not Sticky” or “Too Sticky”?
Unveiling the Secrets of Adhesion Abstract Stretch film plays a critical role in cargo stability, transportation safety, and cost efficiency. However, end-users often encounter two extreme issues: insufficient adhesion or excessive stickiness. This article systematically analyzes the mechanisms...Read more -
Analysis of the Impact of Stretching on Film Performance and Structure
01 Introduction With the development of technology and increasing demands for film applications, forming processes are no longer limited to casting and blowing. New methods, such as casting combined with MDO (machine direction orientation), blowing combined with MDO, and biaxially oriented films...Read more -
How much do you know about elongation at break?
01 Definition of Elongation at Break Elongation at break refers to the ratio of the elongated length of a material under tensile force until it breaks to its original gauge length. It is an important parameter for measuring the toughness of a material, usually expressed as a percentage. A higher ...Read more -
In-depth Analysis of PE Stretch Film Raw Materials
01 Introduction Friends working in the PE film industry must often talk about PE film raw materials: LDPE, LLDPE, HDPE, etc. Perhaps some friends only know that they are low-density, linear low-density, and high-density PE respectively, but they have not yet understood their respective properties...Read more -
Introduction to Cast Stretch Film
01 Introduction to Cast Film and Its Production Process Cast film is a type of plastic film produced through the extrusion casting process, characterized by uniform thickness, flat surface, and excellent optical properties. Its basic production principle involves heating and melting thermoplastic...Read more -
Tensile strength and elongation at break of stretch films
1 Introduction In the world of stretch films, tensile strength and elongation at break are like two partners with distinct personalities—one pursues unyielding toughness, while the other advocates extensibility and tolerance. Understanding their relationship correctly is key to designing high-per...Read more -
Why does the stretch film develop “edge waves”?
01 Introduction In the world of film manufacturing, whether it’s high-precision optical films, stringent lithium battery separators, or everyday packaging films, flatness is the cornerstone of quality. However, a defect jokingly referred to by engineers as the “psoriasis of the film industr...Read more -
Want to know about PE stretch film? Here it is!
01 Background of PE Stretch Film Before the 1990s, the domestic stretch film market was dominated by polyvinyl chloride (PVC). PVC stretch film, produced with PVC as the base material and DOA as both plasticizer and self-adhesive, had fatal flaws such as being non-environmentally friendly, high i...Read more -
Why does the stretch film have “water ripples”?
01 What is Water Ripple? Typically, the surface of freshly extruded film should be smooth. However, sometimes longitudinal wavelike patterns (usually parallel to the direction of traction) similar to rippling water may appear on the surface or inside the film. This phenomenon is known as “...Read more -
The Versatility of Stretch Film in Diverse Applications
Stretch film’s versatility is one of its most remarkable features, making it applicable in a wide range of industries and scenarios. In the logistics and transportation industry, stretch film is primarily used for pallet wrapping. It securely fastens products to pallets, preventing them fr...Read more -
The Ease of Use of Stretch Film in Packaging
In the world of packaging, ease of use is a key factor that can significantly impact efficiency. Stretch film stands out for its simplicity and convenience in application. Stretch film is lightweight, which makes it easy to handle. Workers can effortlessly carry rolls of stretch film and apply i...Read more
