Preparation method of personal care electronic product rubber-coated handle

Abstract

The invention relates to a preparation method of a personal care electronic product rubber-coated handle. According to the preparation method, SEBS can reduce the hardness of polyester type or polyether type TPU; polyester type or polyether type TPU and maleic anhydride grafted SEBS / maleic anhydride grafted ABS are subjected to a hydrogen abstraction reaction in the extrusion granulation process,and TPU grafted SEBS / ABS is formed; mineral oil does not generate small molecular substances at high temperature, so that the strength and the bonding fastness of a rubber coating material are improved; carbamate bonds on the polyester type or polyether type TPU react with a product of thermal dissociation to generate isocyanate; the soft modified TPU and the hard modified TPU react with each other; maleic anhydride and isocyanate form a graft copolymer on a soft and hard modified TPU interface, so that acting force except hydrogen bonds and Van der Waals' force is formed between soft and hardmodified TPU, the binding force of the obtained material can be kept in a weak acid / weak base environment, and the material is not easy to peel and fall off.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a method for preparing a rubber-coated handle of an electronic product for personal care. Background technique [0002] Electronic products for personal care and care, such as electric toothbrushes, electric facial cleansers and other products, the handles are generally ABS, PC, PC / ABS, ASA and other engineering plastics, in order to make the buttons and other parts that directly touch the hands have a good feel , Generally, soft rubber is used to cover the hard handle. Commonly used soft rubber includes TPE, TPU or silica gel, which can improve the aesthetics and feel of injection molding products, and can be continuously produced. [0003] At present, the commonly used solutions are: 1. Use silica gel or other soft glue, and use glue bonding to combine with engineering plastics. The disadvantages are that the steps are cumbersome and uncontrollable. Glue, in the ac...

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Problems solved by technology

[0003] At present, the commonly used solutions are: 1. Use silica gel or other soft glue, and use glue bonding to combine with engineering plastics. The disadvantages are that the steps are cumbersome and uncontrollable. Glue, in the actual test, the glue will be hydrolyzed under the action of soapy water, toothpaste water, mouthwash, cleansing products, etc., resulting in easy degumming of soft and hard glue

2. Use TPU or TPE for secondary injection molding on engineering plastics. Through secondary injection molding, the bonding force between soft and hard rubber mainly depends on Van der Waals force and the melted soft rubber penetrates into the gap of hard rubber, and comes into contact with soapy water and toothpaste. Water, mouthwash, cleansing products, etc., TPU or TPE will have the problem of decreasing the binding force with engineering plastics in two days in this environment, swelling, degradation, chain breaking and breaking of the binding force will occur, resulting in degumming and affecting use

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