High strength polycarbonate composite capable of marking through laser

Abstract

The invention discloses a high strength polycarbonate composite capable of marking through laser, which comprises components with parts by weight: poly carbonate (PC) resins 15-60%, silicon copolymer PC 5-40%, compatilizer 0-8%, fire retardants 0-20%, laser marking assistants 0.1-2%, processing agents 0.1-5% and fiberglass 20-60%, and is scientific in materials selection and rigorous in preparation method through steps of materials preparing, mixing and extruding, the high strength polycarbonate composite capable of marking through laser has rigidity capable of replacing metals, is high in strength, has excellent surface quality, does not have precipitation for long time, can form clear laser marking effect simultaneously, forms various characters, symbols and patterns, reduces subsequent processing operations of products, improves production efficiency, saves cost, and is suitable for occasions which have high requirements for appearance beauty and strength at the same time.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-strength polycarbonate compound capable of laser marking and a preparation method thereof. Background technique [0002] In the current very competitive market environment, in order to improve the competitiveness of products, manufacturers have invested a lot of energy in product differentiation in order to maintain a good surplus rate and low cost. This distinction is mainly achieved through two aspects, one is more advanced design, better visual effect or new functionality, and the other is the economic rationalization of components, such as in the automotive, mechanical, electronic and medical fields, to improve the reliability of end products , Reduce the total cost, for these reasons, replacing metal and some other traditional materials with plastic has become one of the main strategies for product management in many markets. [0003] With the continuous ...

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Problems solved by technology

[0003] With the continuous advancement of resin and glass fiber technology, the manufacturing capacity of manufacturers has generally increased, making the price and cost of glass fiber reinforced composite materials accepted by many industries. However, due to factors such as glass fiber exposure, the strength, surface The appearance is unsatisfactory. When a good appearance is required, follow-up processes such as spraying are usually added to meet its decorative requirements. In addition to increasing costs and environmental pollution caused by some solvents, spraying and other processes also have paint The surface falls off, the temperature resistance of the paint surface is not enough, etc.

[0004] Marking on the surface of the product is a must for the manufacturer. Traditional electrochemical and mechanical marking methods are polluted, inconvenient to operate, and low in efficiency. Laser marking uses high-energy-density lasers to irradiate the workpiece locally. A marking method that vaporizes the surface material or undergoes a chemical reaction that changes color, thereby leaving a permanent mark. It has been rapidly and widely used in recent years. Laser marking can print various characters, symbols and patterns, etc., character size It can be on the order of millimeters to microns, and there is no loss, no disturbance, no deformation to the workpiece, and no pollution to the environment. However, some materials have low absorption rate of laser light. In order to obtain a clear marking effect, it is necessary to increase the power of the laser light source Table and repetition rate, the problem brought by this is that the thermal damage and thermal diffusion of the non-marking area of ​​the material are relatively serious, the processing accuracy is not high, and the marking effect is not good