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Method for preparing special thermoplastic polyurethane material capable of achieving laser marking

A thermoplastic polyurethane, laser marking technology, applied in the field of material preparation, which can solve the problems of poor dispersion, dispersion and markability limitations

Inactive Publication Date: 2015-11-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: aiming at the limitations of existing universal laser marking additives on thermoplastic polyurethane laser marking and the poor dispersibility of inorganic powder laser marking additives in thermoplastic polyurethane, the present invention provides a God has prepared a high-efficiency laser-markable special material for thermoplastic polyurethane by using a compound inorganic powder coated with a polymer dispersant and a carbon-forming agent, thereby solving the problem of dispersion and markable limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Take substance A and put it into a pulverizer to crush it into 115 mesh particles, put it into a container, add a hydrochloric acid solution with a mass fraction of 95% to it, submerge the particles by 4cm, and stir to dissolve them completely; place the above container under ultraviolet light irradiation Next, add substance B to it, seal it, use nitrogen to discharge the air inside the container, stir for 2 hours, slowly raise the temperature to 45°C, then cool to 15°C, add a sodium hydroxide solution with a mass fraction of 70% to it, and solids are precipitated. Stop adding sodium hydroxide solution until no solid is precipitated, and filter; put the obtained solid in an oven to dry, take it out and cool it to room temperature, put it in a high-mixer, add substance C and tetra[β- (3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester is mixed evenly, the rotating speed is set at 900r / min, and the heat mixing time is 12min; the mixture obtained above i...

example 2

[0025] Take substance A and put it into a pulverizer to crush it into 115 mesh particles, put it into a container, add a hydrochloric acid solution with a mass fraction of 95% to it, submerge the particles by 4cm, and stir to dissolve them completely; place the above container under ultraviolet light irradiation Next, add substance B to it, seal it, use nitrogen to discharge the air inside the container, stir for 2 hours, slowly raise the temperature to 45°C, then cool to 15°C, add a sodium hydroxide solution with a mass fraction of 70% to it, and solids are precipitated. Stop adding sodium hydroxide solution until no solid is precipitated, and filter; put the obtained solid in an oven to dry, take it out and cool it to room temperature, put it in a high-mixer, add substance C and tetra[β- (3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester is mixed evenly, the rotating speed is set at 900r / min, and the heat mixing time is 12min; the mixture obtained above i...

example 3

[0030]Take substance A and put it into a pulverizer to crush it into 115 mesh particles, put it into a container, add a hydrochloric acid solution with a mass fraction of 95% to it, submerge the particles by 4cm, and stir to dissolve them completely; place the above container under ultraviolet light irradiation Next, add substance B to it, seal it, use nitrogen to discharge the air inside the container, stir for 2 hours, slowly raise the temperature to 45°C, then cool to 15°C, add a sodium hydroxide solution with a mass fraction of 70% to it, and solids are precipitated. Stop adding sodium hydroxide solution until no solid is precipitated, and filter; put the obtained solid in an oven to dry, take it out and cool it to room temperature, put it in a high-mixer, add substance C and tetra[β- (3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester is mixed evenly, the rotating speed is set at 900r / min, and the heat mixing time is 12min; the mixture obtained above is...

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PUM

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Abstract

The invention relates to a method for preparing a special thermoplastic polyurethane material capable of achieving laser marking, and belongs to the technical field of material preparation. Aiming at the limitation of existing pervasive laser marking additives to the laser marking implementability of thermoplastic polyurethane and the poor dispersibility of inorganic powder laser marking additives in thermoplastic polyurethane, the efficient special laser marking material for thermoplastic polyurethane is prepared through compound inorganic powder subjected to surface coating treatment of polymeric dispersant and carbon-forming agents, and the problem of dispersion and marking limitation is solved. A living example proves that when the special material is prepared under irradiation of a Nd:YAG laser according to the method, dark marks with high contrast and marginal definition can be generated, product marking is lasting, surface damage is low, the obtained special material has specificity and high efficiency, and compared with the limited improvement performance of the pervasive laser marking additives on the laser marking implementability of thermoplastic polyurethane, the two-dimension code marks of the special material reach the grade of being scanned and recognized by machines.

Description

technical field [0001] The invention relates to the preparation of a laser-markable thermoplastic polyurethane special material, which belongs to the technical field of material preparation. Background technique [0002] As a new type of modern processing and marking method, laser marking polymer is to use the high-energy energy of laser to irradiate the plastic to produce complex discoloration phenomenon, and to obtain marks with different colors from the matrix. The marked products have high precision, fast production speed, and green production conditions. Environmental protection, etc. advantage. At present, laser marking is mainly used in permanent trademarks, anti-counterfeiting codes, QR codes, bar codes, and tracking of important products. Thermoplastic polyurethane has both the processing performance of plastics and the physical and mechanical properties of rubber, and is one of the most widely used elastomer materials. When thermoplastic polyurethane is used in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08L75/04C08L33/26C08L23/06C08L71/02C08K13/02C08K3/22C08K3/32C08K3/18C08K5/134C08K5/053
Inventor 刘春林
Owner CHANGZHOU UNIV