What is the tensile strength of Heat Shrink Film?
Publish Time: 2024-10-21
Heat Shrink Film is a specially treated film material that can shrink and tightly wrap the packaged object after heating. Its tensile strength is a measure of the material's ability to resist tearing or breaking when subjected to tensile force.1. Material typePolyethylene (PE): Polyethylene Heat Shrink Film has good tensile strength and is suitable for food packaging, daily necessities packaging, etc. Depending on the density and molecular structure, the tensile strength of PE film can be between 20-40 MPa.Polyvinyl chloride (PVC): PVC Heat Shrink Film has a high tensile strength, usually between 15-30 MPa, and is suitable for beverage bottle labels, pharmaceutical packaging, etc.Polypropylene (PP): Polypropylene Heat Shrink Film also has a high tensile strength, usually between 25-50 MPa, and is suitable for heavier commodity packaging, such as metal products, glass containers, etc.Polyvinylidene chloride (PVDC): PVDC Heat Shrink Film has the highest tensile strength, usually between 40-60 MPa, and is suitable for packaging with high barrier and high strength requirements, such as cigarette packaging, military packaging, etc.2. ThicknessThickness is proportional to tensile strength: Generally speaking, the thicker the Heat Shrink Film, the higher its tensile strength. The standard thickness range is usually between 20-100 microns, and the specific thickness is selected according to packaging requirements and product characteristics.3. Molecular structure and processing technologyMolecular arrangement: The tensile strength of Heat Shrink Film can be improved by optimizing molecular arrangement and crystallinity. For example, biaxial stretching (BOPP/BOPET) can significantly improve the tensile properties of the material.Blending and modification: The tensile strength of Heat Shrink Film can be further improved by blending other polymer materials or adding reinforcing agents (such as fillers, fibers, etc.).4. Environmental conditionsTemperature influence: In high temperature environments, the tensile strength of Heat Shrink Film may decrease. Therefore, Heat Shrink Film should avoid being exposed to high temperature for a long time during use.Humidity influence: Some Heat Shrink Film materials (such as PVC) are sensitive to humidity and need to be stored and used in a dry environment to maintain their tensile strength.5. Application areasLightweight packaging: For the packaging of light goods, such as food, medicine, daily necessities, etc., Heat Shrink Film with a tensile strength in the range of 20-30 MPa is usually used.Heavyweight packaging: For the packaging of heavy goods, such as metal products, glass containers, etc., Heat Shrink Film with a higher tensile strength in the range of 40-60 MPa is required.The tensile strength of Heat Shrink Film depends on many factors, including material type (such as PE, PVC, PP, PVDC), thickness, molecular structure and processing technology, environmental conditions, etc. Different types of Heat Shrink Film have different tensile strength ranges, ranging from 20 MPa to 60 MPa, suitable for different packaging needs. Through reasonable selection of materials and optimized design, Heat Shrink Film can provide good tensile resistance during the packaging process, ensuring the stability and safety of the packaged objects.
