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The structural composition of high-temperature resistant labels: surface material, adhesive, and backing paper,
1. High temperature resistant label surface material: A 25um (or 50um) coated polyimide film cannot meet the performance requirements without coating treatment. Coating treatment can better meet the printing barcode properties required by the process and the requirements for material color and glossiness.
2. High temperature resistant label adhesive: Currently, adhesives are generally divided into three categories: rubber, acrylic, and silicone. Rubber has low cost, poor temperature and chemical resistance, and outstanding aging resistance. Silicone has superior performance, but it is also very expensive. Acrylic adhesives have a temperature resistance of around 200 degrees Celsius, good chemical and oxidation resistance, and are also reasonably priced. Currently, 90% of the adhesives for some brand tapes are made of acrylic acid. The high-temperature label uses permanent acrylic pressure-sensitive adhesive.
High temperature resistant label
3. High temperature resistant label backing paper: Grasin release paper, white single copper release paper, silicon yellow release paper, PET release film.
Steel labels are made by applying a white coating on the surface of aluminum foil and gluing the back, with a maximum temperature resistance of 600 degrees.
The most commonly used high-temperature label is the polyimide label, which generally has a temperature resistance of 260-310 degrees and a maximum temperature resistance of around 500 degrees.
Among common synthetic paper labels, PET is more resistant to temperature, with a long-term temperature resistance of up to 120 degrees and a short-term temperature resistance of up to 180 degrees. In addition, PP synthetic paper labels can also withstand temperature.
PVC labels can be said to be the least temperature resistant among labels. At room temperature, PVC film will experience slow shrinkage.
High temperature resistant labels are processed using special materials, including adhesives. Customization of high temperature resistant labels requires screening based on specific product usage environments。