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|1. (WO2018205326) ADHESIVE-FREE BOTTLE CAP GASKET AND/OR PADDING AND PREPARATION METHOD THEREFOR|
|Applicants:||FOSHAN TONGJUN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD
|Title:||ADHESIVE-FREE BOTTLE CAP GASKET AND/OR PADDING AND PREPARATION METHOD THEREFOR|
An adhesive-free bottle cap gasket pellet, prepared from the following raw materials in parts by weight: 50-80 parts of thermoplastic elastomer; 15-40 parts of polyethylene; 5-15 parts of rosin resin; and 5-10 parts of octadecanamide. A preparation method comprises: thoroughly mixing the raw materials in parts by weight, extruding, pelletizing, water-cooling, and drying same to form special pellets for a bottle cap gasket and/or padding, and putting the pellets into a molding machine, extruding droplets into a bottle cap at 100-150°C, compressing to form so as to obtain an adhesive-free gasket and/or padding. The gasket pellets can be directly injection-molded so as to form a gasket and/or padding with a strong strength of bonding with the bottle cap without any adhesive, so that the bottle cap production process is simpler and the energy consumption is reduced; the gasket pellets have passed strict food safety testing, and are especially applicable to the production of food bottle caps; the adverse effects of the adhesive on the food in a bottle are avoided; the competitiveness of domestic bottle cap manufacturers is greatly increased.