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What is the composition of printing thermal transfer film?

The thermal transfer printing process is the most important and frequently used production process for our products. Many customers who are not familiar with similar products may be unfamiliar with transfer film, so today we will explore the composition of thermal transfer film.

The thermal transfer film consists of a base film, release layer, printing layer, and Adhesive layer.

1. Base layer: There are various options available for base layer film materials, including PET film, OPP film, PVC film, etc. The appropriate film is chosen based on the specific product requirements. To ensure the highest quality of our products, Utop company select PET film with the most stable thermal sensitivity as the base film despite its higher cost. This ensures that our customers' products maintain a consistently high quality during the hot stamping process.

 2. Release layer: The release layer refers to a solid coating of release agent applied onto the base film which melts at a specific temperature. Its primary function is to minimize adhesion between the printing layer ink and the base film, allowing quick separation of printed logos and patterns from the base film without any residual ink. Therefore, it plays a crucial role in achieving precise pattern formation during printing.

3. Printing layer: This layer is displayed on our thermal transfer films, what we commonly refer to as thermal transfer designs. Similar to other printing processes, CMYK ink is utilized to create vibrant colors and intricate designs tailored for each customer's needs. During thermal transfer, continuous heating by silicone printing wheels transmits high temperatures to this printing layer causing sublimation of thermal transfer ink which then bonds onto product surfaces resulting in visually appealing patterns being left behind on products themselves. The choice of printing ink holds significant importance not only because it directly impacts the quality of thermal transfer products but also needs to be made safe for use in contact with children. Utop company utilizes environmentally-friendly thermal transfer ink that complies with EU LFGB and US FDA inspections. Our long-standing commitment to environmental protection and safety has ensured the health of millions of children who use our products.

4. Adhesive layer: The adhesive layer is the final step in the production of transfer film printing. Similar to the release layer, it's a thermal transfer glue coating. Its role is to assist the ink and the printed product to better adsorb and bond together during the heating process of the ink pattern. Different types of thermal transfer glue coatings (such as PP, PE, ABS/AS) need to be selected based on the material properties of each product. Choosing an incorrect glue coating may result in easy peeling or incomplete patterns on customer's products. With over 10 years' experience in producing thermal transfer products, Utop company conducts standard oil dumping tests using 3M test tape during trial production to ensure pattern quality before mass production begins, thus providing customers with guaranteed product quality.

Guangzhou Utop Industrial Co., Ltd is a professional manufacturer in China which specialized in Eco kids cartoon products，promotional gifts & housewares products, like lunch box, water bottle and cups. If you need any assistance or related products, please feel free to contact us. We will be your trusted partner.

From:  www.utopcn.net     

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