Detailed explanation of the viscosity and color of PE protective film

Revealing the world of viscosity and color of PE protective films, polyethylene (PE) protective films play a crucial role in modern industry and daily life. It can not only effectively protect products from external environmental influences, but also improve the surface smoothness and aesthetics of products. However, for most people, the mystery of the viscosity and color of PE protective film remains a mystery. This article will delve into the scientific principles behind these characteristics and their importance in practical applications. What is viscosity of PE protective film? Viscosity refers to the ability of a material to resist shear deformation, usually quantified by “viscosity”. In the film industry, what we refer to as “viscosity” often refers to the adhesion or peel strength of the material. The viscosity of PE protective film mainly comes from the glue and additives in its formula. Different glue components will give the film different viscosity characteristics, such as initial viscosity, lasting viscosity and anti-aging properties. The factors that affect the viscosity of PE protective film are temperature and humidity: Changes in temperature and humidity can affect the activity of the adhesive and the wetting effect of the film surface, thereby changing the viscosity performance of the film. Substrate and coating quality: High quality substrates and uniform coatings help achieve more stable adhesion. Thickness and coating amount: Appropriate thickness and reasonable coating amount are crucial for maintaining good adhesion. The testing method for viscosity is to conduct a rolling ball test using ASTM D3330 or other standards to determine the adhesion ability of the film under different conditions. In addition, other testing methods such as T-Peel Test (ASTM D1876) and 90 ° Peel Test (ASTM D1000) can be used to evaluate the viscosity of thin films. Why do PE protective films come in multiple colors? The color of PE protective film is not only for aesthetics, but each color has specific functional requirements and technical considerations behind it. For example, transparent colors are often used in situations where light needs to be transmitted; White may have better shading effects; Blue or yellow may be more easily recognized in specific environments. The principle of color selection is to choose the appropriate protective film color based on the material and appearance design of the product to ensure the best packaging effect. At the same time, factors such as production costs and market positioning also need to be considered. The stability and safety of colors ensure that the dyes and pigments used comply with food safety and environmental standards. After long-term use, the protective film should not fade or discolor to avoid affecting the product image. Conclusion: The viscosity and color of PE protective film are key factors for its effectiveness in different fields. Understanding the essence and influencing factors of these characteristics can help us better choose and use PE protective films in practical applications to meet the needs of various product protection and packaging. With the development of technology and the continuous upgrading of consumer demand, it is believed that in the future, PE protective films will demonstrate their unique value in more aspects.