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Release paper, also known as isolation paper, silicone paper, or anti-stick paper, is a type of paper designed to prevent prepreg materials from sticking together while protecting them from contamination. Release paper comes in various types, typically categorized as plastic-coated release paper and non-plastic release paper. Additionally, based on the release agent used, it can be divided into silicone release paper and non-silicone release paper. So, what conditions must release paper meet during production? Here’s an overview from release paper suppliers:
- Cleanliness of Release Paper Cleanliness refers to the surface’s cleanliness and smoothness. Since different manufacturers operate in varying work environments, it’s rare for production to occur in a completely dust-free cleanroom. Generally, factories with better facilities have significant advantages in environmental control and cleanliness, as these factors directly impact the product’s cleanliness. Often, the lack of cleanliness in release paper is not due to contamination during production but rather during the slitting process. If the slitting facility’s cleanliness standards are low, static electricity can attract dust, leading to contamination.
- Adhesion and Easy Separation Release paper must effectively adhere to prepreg materials while allowing for easy separation when needed.
- Peel Strength of Release Paper Peel strength refers to how easily the release paper can be removed from the adhered material, such as tape or protective film. This property is subject to strict testing procedures, often using small-scale slitting machines and adhering to international standards. Peel strength is measured in grams and is typically classified into three levels: light, medium, and heavy release.
- Light release: The release paper and adhesive material (e.g., tape or film) can be easily separated.
- Medium release: Separation is moderately difficult.
- Heavy release: Separation is challenging and requires more force.