What Are the Characteristics of Good Stretch Wrap?

Stretch wrap, also known as stretch film or stretch wrap film, is a packaging form that is very popular internationally. It is essential for those who run online stores or frequently ship goods. It has high strength and elasticity, can tightly wrap any geometric shape of goods, and avoids damage to products caused by tying. It also has good transparency, stretch strength, tear resistance, and self-adhesion.

Since stretch wrap has such a wide range of uses, there must be many manufacturers producing it, and on platforms like Taobao, there is a dazzling variety. Today, we at Li Xiangjia will teach you what features make a good stretch wrap.

More than 90% of the stretch wrap available on the market is produced by domestic equipment costing between 100,000 and 500,000, with the main equipment brands being Guangdong Xinhuida and Changlongxing. About 5% of the products are made by domestic blown film equipment costing between 2 million and 6 million, such as the equipment from Hebei Xinle Huabao. Less than 1% of the products come from imported equipment, mainly from world-class brands like Austria's Blue Whale and Germany's W&H, with each unit costing around 50 million. With such a significant difference in equipment prices, it is understandable that the quality of the products will also vary greatly!

Differences include:

• Stretch and puncture resistance
• Adhesion
• Flatness and transparency
• Wrapping tightness, i.e., elasticity

Stretch wrap generally achieves good adhesion by adding PIB or blending VLDPE to the polymer. PIB is a semi-transparent, viscous liquid. High-quality stretch wrap has good self-adhesion, which allows the outer layers of the packaging film to stick together, making the goods secure.

1.Puncture resistance. High-quality stretch wrap is made from high-quality LLDPE as the base material, combined with excellent adhesives. It is produced through heating, extrusion, and blown film processes, followed by rapid cooling on a chill roller. Therefore, high-quality stretch wrap can withstand punctures and ensure that products are not damaged under harsh weather conditions.

2. High tensile strength. Generally, PE stretch wrap is used for industrial packaging. Therefore, high-quality PE stretch wrap must have high tensile strength to meet the high packaging requirements of various industries. At the same time, this high strength also requires the PE stretch wrap to have good elongation.