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A polycarbonate molding with high welding strength and its preparation method
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A technology for welding strength and polycarbonate, applied in the field of polycarbonate moldings and their preparation, can solve the problems of high glass transition temperature of polycarbonate, poor melt strength and melt stability, affecting the use of power adapters, etc. , to achieve the effect of improving melt strength and melt stability, improving ultrasonic welding strength and improving melt stability
Active Publication Date: 2022-05-10
KINGFA SCI & TECH CO LTD
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The power adapter shell is usually made of polycarbonate material. During ultrasonic welding, due to the high glass transition temperature of polycarbonate itself, the melt strength and melt stability are poor, and problems such as low welding strength are prone to occur, which will affect the power adapter. product use
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Abstract
The invention discloses a polycarbonate molding with high welding strength and a preparation method thereof. The molding comprises the following components in parts by weight: 30-70 parts of polycarbonate resin with a molecular weight of 25000-28000; 30-70 parts of polycarbonate resin with a molecular weight of 18000-21000; 0.2-0.8 parts of welding strengthening additive A; 0.2-1 part of welding strengthening additive B; 0.1-0.5 parts of antioxidant. The molded article disclosed by the present invention adopts the polycarbonate mixture of different molecular weights, and the method of adding two types of welding strengthening additives improves the melt strength and melt stability of polycarbonate, thereby improving the ultrasonic wave of polycarbonate Welding strength widens the process window of polycarbonate ultrasonic welding.
Description
technical field [0001] The invention relates to the field of polymer material processing, in particular to a polycarbonate molding with high welding strength and a preparation method thereof. Background technique [0002] When the ultrasonic wave acts on the thermoplastic contact surface, it will generate tens of thousands of high-frequency vibrations per second. This kind of high-frequency vibration with a certain amplitude will transmit the ultrasonic energy to the welding area through the weldment. Since the welding area is two welds The acoustic resistance at the interface of the parts is large, so local high temperature will be generated. And because of the poor thermal conductivity of the plastic, it cannot be dissipated in time for a while, and it gathers in the welding area, causing the contact surface of the two plastics to melt rapidly, and after a certain pressure is added, it is fused into one. [0003] Ultrasonic welding is a convenient and fast welding method,...
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Application Information
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