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A preparation method for a plastic-coated handle of an electronic product for personal care

A technology for electronic products and handles, which is applied in the field of preparation of plastic-coated handles for personal care electronic products, which can solve the problems of broken bonding force, difficulty in finding glue, and decreased bonding force of engineering plastics, so as to improve strength and bond firmness High degree, convenient for continuous production, not easy to peel off

Active Publication Date: 2022-03-22
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A preparation method for a plastic-coated handle of an electronic product for personal care

Examples

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Effect test

Embodiment 1

[0023] A method for preparing a plastic-coated handle of an electronic product for personal care, the steps are as follows:

[0024] (1) Preparation of hard modified TPU

[0025] Take 85 parts of MIRATHANE E175D with a hardness of 75D, 5 parts of maleic anhydride grafted ABS, 3 parts of SEBS6151 and 7 parts of mineral oil, mix them evenly, and put them into a twin-screw extruder for reaction. Control the melting temperature of the twin-screw extruder to 240°C , the screw speed is 300r / min, and the residence time is 2min; after underwater pelletizing, the water temperature is controlled at 40°C, and dried at 60°C for 2h;

[0026] (2) Preparation of soft modified TPU

[0027] Take 85 parts of MIRATHANE E180 with a hardness of 80A, 10 parts of maleic anhydride grafted SEBS, 10 parts of SEBS6151 and 15 parts of mineral oil, mix them evenly, enter the twin-screw extruder for reaction, and control the melting temperature of the twin-screw extruder to 240°C , the screw speed is 300...

Embodiment 2

[0060] A method for preparing a plastic-coated handle of an electronic product for personal care, the steps are as follows:

[0061] (1) Preparation of hard modified TPU

[0062] Take 90 parts of MIRATHANE E165D with a hardness of 65D, 5 parts of maleic anhydride grafted ABS, 5 parts of SEBS9551 and 5 parts of mineral oil, mix them evenly, enter the twin-screw extruder for reaction, and control the melting temperature of the twin-screw extruder to 200°C , the screw speed is 200r / min, and the residence time is 2min; after underwater pelletizing, the water temperature is controlled at 50°C, and dried at 70°C for 1h;

[0063] (2) Preparation of soft modified TPU

[0064] Take 95 parts of MIRATHANE E265 with a hardness of 65A, 5 parts of maleic anhydride grafted SEBS, 6 parts of SEBS9551 and 5 parts of mineral oil, mix them evenly, and put them into a twin-screw extruder for reaction. Control the melting temperature of the twin-screw extruder to 180°C , the screw speed is 210r / m...

Embodiment 3

[0068] A method for preparing a plastic-coated handle of an electronic product for personal care, the steps are as follows:

[0069] (1) Preparation of hard modified TPU

[0070] Take 85 parts of MIRATHANE M75D with a hardness of 75D, 5 parts of maleic anhydride grafted ABS, 3 parts of SEBS6154 and 7 parts of mineral oil, mix them evenly, enter the twin-screw extruder for reaction, and control the melting temperature of the twin-screw extruder to 250°C , the screw speed is 350r / min, and the residence time is 1min; after underwater pelletizing, the water temperature is controlled at 60°C, and dried at 80°C for 0.5h;

[0071] (2) Preparation of soft modified TPU

[0072] Take 85 parts of MIRATHANE M80 with a hardness of 80A, 10 parts of maleic anhydride grafted SEBS, 10 parts of SEBS6154 and 15 parts of mineral oil, mix them evenly, enter the twin-screw extruder for reaction, and control the melting temperature of the twin-screw extruder to 240°C , the screw speed is 320r / min,...

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Abstract

The invention relates to a method for preparing a rubberized handle of an electronic product for personal care, wherein SEBS can reduce the hardness of polyester or polyether TPU; polyester or polyether TPU is grafted with maleic anhydride SEBS / Maleic anhydride grafted ABS will undergo a hydrogen abstraction reaction during extrusion and granulation to form TPU grafted SEBS / ABS; mineral oil will not produce small molecular substances at high temperatures, thereby improving the strength and bonding of the encapsulation material degree; the urethane bond on polyester or polyether TPU reacts with thermal dissociation products to form isocyanate, soft and hard modified TPU react with each other, maleic anhydride and isocyanate in soft and hard modified TPU A graft copolymer is formed on the interface, so that a force other than hydrogen bond and van der Waals force is formed between the soft and hard modified TPU, which is conducive to maintaining the combination of the obtained material in a weak acid / weak alkaline environment Strong, not easy to peel 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L75/08C08L51/00C08L55/02C08L53/02C08K5/01B29C45/14
CPCC08L75/06C08L75/08B29C45/14B29C45/1418B29C2045/14245C08L51/006C08L55/02C08L53/025C08K5/01
Inventor 李庆钊战振生宋红玮宋修禄任光雷
Owner MIRACLL CHEM
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