PP release film is a kind of film with polypropylene (PP) as the base material, which has been specially treated and possesses release performance. The following is a detailed introduction about it:
Characteristics
Excellent release performance: It can be conveniently separated from various materials, such as adhesives, rubber, plastics, etc., and no impurities will remain on the surface of the separated materials after separation, ensuring the surface quality of the separated materials.
High transparency: PP release film has a high level of transparency, allowing for a clear observation of the covered or protected objects. This is particularly important in applications where appearance is a concern, such as screen protection for electronic products and protection for optical lenses.
Excellent physical properties: It features high tensile strength, tear strength and flexibility, capable of withstanding a certain degree of stretching and bending without breaking, and is suitable for various processing and usage environments.
Good chemical stability: PP material itself has good chemical stability and is not easily eroded by acids, alkalis, salts and other chemical substances. It can maintain stable performance in different chemical environments and is suitable for some occasions that need to come into contact with chemical substances.
Good temperature resistance: It can be used within a certain temperature range, generally withstanding temperatures from -20℃ to around 120℃, meeting the temperature requirements of many conventional production processes and usage environments.
Environmentally friendly and non-toxic: PP material is an environmentally friendly material, non-toxic and odorless, meeting relevant environmental protection standards for food packaging, etc. It can be used in fields with high environmental protection requirements.
Application field
Adhesive products: They are indispensable materials in the production process of pressure-sensitive tapes, labels and other adhesive products. As a release layer, they facilitate the storage and transportation of tapes or labels before use and can be easily peeled off during use.
The electronics industry: It is used for packaging electronic components, the production of protective films, and covering protection during the circuit board manufacturing process, etc., which can prevent electronic components from being contaminated, scratched or damaged by static electricity.
In the field of optics: During the production and transportation of optical products such as optical lenses, polarizers, and liquid crystal displays, as a protective material, it can effectively prevent the surface of the lenses from being scratched or contaminated. Meanwhile, due to its high transparency, it will not affect the optical performance of optical products.
Medical industry: It can be used in products such as medical tapes, wound dressings, and medical films. The release film is required to have good biocompatibility and hygiene performance. PP release film can meet these requirements, ensuring the quality and safety of medical products.
Automotive industry: In the production of automotive interior parts, it is used to protect surface materials such as leather and plastic from damage and contamination during processing and transportation. In the automotive painting process, it can also be used as a masking film to protect areas that do not need to be painted.
Food packaging: Due to its environmentally friendly and non-toxic nature, it can be used in the field of food packaging, such as for the packaging of candies, biscuits and other foods, serving as an isolation layer to prevent food from adhering to packaging materials.
Production process
The production process of PP release film usually includes steps such as raw material mixing, extrusion, stretching, coating with release agent, and curing. First, mix the PP resin and additives evenly. Then, extrude it into a film through an extruder. Next, improve the performance of the film through a stretching process. Then, apply a release agent on the surface of the film. Finally, fix the release agent on the surface of the film through drying or curing processes, forming a PP release film with release performance. Different manufacturers may vary in specific process parameters and equipment to produce products that meet the needs of different customers.
