3 results about "Celluloid" patented technology

This invention discloses a celluloid composite film for out-of-mold decoration processes and its manufacturing method. The composite film comprises, from bottom to top, an injection molding substrate, a polyurethane adhesive layer, a celluloid decorative film layer, a high-transparency polyurethane adhesive layer, and a protective film layer. The injection molding substrate is a PC or ABS injection molded part; the protective film layer is a PMMA or PC film; the polyurethane adhesive layer is used to firmly bond the celluloid decorative film layer to the injection molding substrate, and the high-transparency polyurethane adhesive layer is used to firmly bond the protective film layer and the celluloid decorative film layer together. The aforementioned celluloid composite film for out-of-mold decoration processes, through its composite structure design of the injection molding substrate, polyurethane adhesive layer, celluloid decorative film layer, high-transparency polyurethane adhesive layer, and protective film layer, avoids the defects of poor weather resistance, easy yellowing, poor solvent resistance, and low surface gloss inherent in using celluloid film alone. The double-layer polyurethane adhesive layer enables tight bonding between the film layers, ensuring the overall structural stability of the composite film.

The invention relates to the technical field of sports equipment manufacturing, in particular to a method for preparing celluloid-free table tennis balls. According to the invention, all petroleum-based plastics and celluloid are completely abandoned, and the main body materials PBAT and PLA are derived from renewable resources (such as corn and starch) and can be biodegraded under specific conditions. And the additive is also environment-friendly, so that the end treatment of the life cycle of the product has no environmental burden, and the whole process from the raw materials to the product is greened.

The celluloid composite decorative membrane for the OMD decorative process comprises a base membrane, and the base membrane is a transparent membrane made of a PMMA (polymethyl methacrylate) material; the celluloid film layer is used for providing special textures for the diaphragm; the cementing layer is formed by coating UV glue and curing, and is used for adhering the celluloid film layer to the lower surface of the base film; the bonding layer is formed by coating a bonding agent on the lower surface of the celluloid film layer; and the protective film is attached to the lower surface of the bonding layer in a peelable manner. According to the invention, the PMMA base membrane is compounded on the celluloid membrane layer, and a specific UV gluing process and a bonding structure are adopted, so that the overall weather resistance and yellowing resistance of the membrane are improved, and the PMMA base membrane has excellent ultraviolet stability and aging resistance; the mechanical strength and the surface wear resistance of the membrane are enhanced, the base membrane is high in hardness and smooth in surface, good support and protection are provided for the whole membrane, the scratch resistance and the impact resistance of the membrane are improved, and the membrane is more suitable for the high-temperature and high-pressure environment in the OMD forming process.