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Thermoplastic resin composition for white laser marking on the molding surface

A thermoplastic resin, laser marking technology, applied in the field of thermoplastic resin composition, can solve the problems of poor whiteness and clarity of marked letters

Active Publication Date: 2008-01-02
LOTTE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has some problems with the whiteness and clarity of the marked letters getting worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative Embodiment 1～4

[0057] The components shown in Table 1 were mixed, and the mixture was extruded into pellets through a twin-screw extruder with L / D=32, Φ=30 mm. The pellets were molded into color test samples at 210°C using a 3 oz injection molding machine. Use a laser marking machine to mark the color detection sample with a square mark of 1×1 cm in size by irradiating a laser beam.

[0058] By measuring CIE L with a color spectrophotometer * Value to evaluate the whiteness (degree of whitening) of the mark. The foaming ability was evaluated by observing the foaming cells of the marked portion with a microscope of 40 times magnification (⊚: good, ◯: normal, △: poor). Durability was determined by rubbing the marked portion with an eraser 2000 times and observing the degree of damage of the marked portion. The durability is also classified into the following grades: ◎: good, ○: normal, △: poor. The results of the detection are shown in Table 2.

[0059] Table 1

[0060] compar...

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PUM

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Abstract

The thermoplastic resin composition for white laser marking according to the present invention comprises (A) 100 parts by weight of an acrylic thermoplastic resin; (B) 0.001 to 3 parts by weight of a black pigment having a particle size of 10-80 nm and an oil absorbency (dibutyl phthalate-DBP) of 100-350 cc / 100g; and (C) 0.1 to 10 parts by weight of a barium sulfate powder. The thermoplastic resin composition of the present invention may also optionally contain organic dyes, inorganic pigments or a mixture thereof.

Description

technical field [0001] The present invention relates to a thermoplastic resin composition for white laser marking capable of forming a clear white mark with high whiteness by irradiating a laser beam. More specifically, the present invention relates to a thermoplastic resin composition having excellent durability, appearance, and impact resistance, comprising an acrylic thermoplastic resin, a black pigment, and barium sulfate powder. Background technique [0002] In general, printing can be performed on the surface of the molded resin article by various known techniques, such as embossing, dip printing, laser marking, and the like. Although the method using paint is most widely adopted for such printing, this process has disadvantages such as high processing cost, contamination by solvents, and poor durability. On the other hand, laser marking is a cheaper and more effective method than painting techniques and can ensure excellent durability of the printed item. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/06
CPCC08K3/0033C08K3/30C08K3/013C08K3/04C08L21/00C08L33/04C08L33/08C08L33/10C08K2003/3045C08L2201/00
Inventor 郑亨柱赵允济金在京
Owner LOTTE ADVANCED MATERIALS CO LTD
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