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EP-3967727-B1 - HIGH-EFFICIENT LASER MARKING MATERIAL AND PREPARATION METHOD THEREFOR

EP3967727B1EP 3967727 B1EP3967727 B1EP 3967727B1EP-3967727-B1

Inventors

  • MIAO, Fei
  • ZHU, Jiong
  • ZHAO, Xueguang
  • GUAN, Chengfei
  • ZHAO, JING

Dates

Publication Date
20260506
Application Date
20191226

Claims (15)

  1. A high-efficiency laser marking material, characterized in that , the high-efficiency laser marking material is prepared from raw materials comprising the following mass percentages: HDPE resin 40 wt% ~ 80 wt%; LLDPE resin 20 wt% ~ 60 wt%; Laser assistant 0.3 wt% ~ 1 wt%, the laser assistant is selected from two or more materials selected from the group consisting of ferroferric oxide and mica copper phosphate; Lubricant 0.2 wt% ~ 1 wt%; Antioxidant 0.3 wt% ~ 0.5 wt%; Light stabilizer 0.1 wt% ~ 0.6 wt%; Black masterbatch 0.5 wt% ~ 5 wt%; the sum of the above components being 100wt%.
  2. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the HDPE resin is at 190° C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 10.0 g/10 min.
  3. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the LLDPE resin is at 190°C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 2.0 g/10 min.
  4. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the lubricant is selected from one or more of PE wax, PPA, silicone, PP wax, oleic acid amide, erucic acid amide, stearic acid and EBS.
  5. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 330, antioxidant 168 and antioxidant DLTP.
  6. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the light stabilizer is selected from one or more of light shielding agents, light absorbers and radical trapping agents.
  7. The high-efficiency laser marking material as claimed in claim 6, characterized in that , the light shielding agent is selected from carbon black and/or tin oxide, the light absorber is selected from UV326 and/or UV531, and the free radical trapping agent is selected from Chimassorb UV944.
  8. The high-efficiency laser marking material as claimed in claim 1, characterized in that , the carbon black content in the high-efficiency laser marking material is not more than 2 wt%; the melt flow rate of the high-efficiency laser marking material is not more than 2.0 g/10 min.
  9. A method for preparing a high-efficiency laser marking material as claimed in claim 1, characterized in that , the method comprising the following steps: A) mixing HDPE resin and LLDPE resin, and adding laser additives, lubricants, antioxidants, light stabilizers and black masterbatch to mix to obtain a mixture; B) extruding the mixture into pellets to obtain high-efficiency laser marking materials.
  10. The method for preparing a high-efficiency laser marking material as claimed in claim 9, characterized in that , a twin-screw extruder is used for the extrusion granulation, and a processing technology of the twin-screw extruder comprises: the temperature of District 1 210~225°C in the first zone, the temperature of District 2 220~235°C in the second zone, the temperature of District 3 230~245°C , the temperature of District 4 240~255°C, the temperature of District 5 220~235°C, the temperature of District 6 230~245°C, the temperature of District 7 225~245°C, the temperature of District 8 220~235°C, the temperature of District 9 215~230°C, the temperature of District 10 195~210°C; a screw speed is 280~350r/min, and a tank temperature is 30~40°C.
  11. The method for preparing a high-efficiency laser marking material as claimed in claim 8, characterized in that , the HDPE resin is at 190° C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 10.0 g/10 min.
  12. The method for preparing a high-efficiency laser marking material as claimed in claim 8, characterized in that , the LLDPE resin is at 190°C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 2.0 g/10 min.
  13. The method for preparing a high-efficiency laser marking material as claimed in claim 8, characterized in that , the lubricant is selected from one or more of PE wax, PPA, silicone, PP wax, oleic acid amide, erucic acid amide, stearic acid and EBS.
  14. The method for preparing a high-efficiency laser marking material as claimed in claim 8, characterized in that , the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 330, antioxidant 168 and antioxidant DLTP.
  15. The method for preparing a high-efficiency laser marking material as claimed in claim 8, characterized in that , the light stabilizer is selected from one or more of light shielding agents, light absorbers and radical trapping agents, the light shielding agent is selected from carbon black and/or tin oxide, the light absorber is selected from UV326 and/or UV531, and the free radical trapping agent is selected from Chimassorb UV944.

Description

TECHNICAL FIELD The disclosure relates to a technical field of materials, and specifically relates to a high-efficiency laser marking material and a preparation method thereof. BACKGROUND In the cabling industry, black PE material is common, and black PE materials can generally be marked with traditional ink jet coding, printing wheel printing, and some other methods. These methods have certain limitations, can significantly affect production requirements. Compared with traditional printing methods, laser printing technology is energy-saving and environmentally friendly, with high applicability and ability to mark clearly. However, in the process of laser printing on the existing black PE material, defects such as blurred marks, poor contrast, and slow marking speed are likely. This is particularly true in the printing of small-sized cables with small outer diameters and thin wall thicknesses, where illegibility, poor contrast, and very low marking speed are more common. Better materials arerequired for industrial production. SUMMARY The material disclosed, which can be laser-marked with high efficiency ("high-efficiency laser marking material"), achieves the goals of high-speed marking, clear marking, and high contrast. Performance of the wire and cable is not affected, nor is the weather resistance. The high-efficiency laser marking material disclosed is prepared from raw materials comprising the following mass percentages: HDPE resin40 wt% ~ 80 wt%;LLDPE resin20 wt% ~ 60 wt%;Laser assistant0.3 wt% ~ 1 wt%, the laser assistant is selected from two or more materials selected from the group consisting of ferroferric oxide, antimony tin oxide and mica copper phosphate; Lubricant0.2 wt% ~ 1 wt%;Antioxidant0.3 wt% ~ 0.5 wt%;Light stabilizer0.1 wt% ~ 0.6 wt%;Black masterbatch0.5 wt% ~ 5 wt%;the sum of the above components being100wt%. Preferably, the HDPE resin is at 190° C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 10.0 g/10 min. Preferably, the LLDPE resin is at 190°C and 2.16 Kg, and a melt flow rate of the HDPE resin is not more than 2.0 g/10 min. Preferably, the lubricant is selected from one or more of PE wax, PPA, silicone, PP wax, oleic acid amide, erucic acid amide, stearic acid, and EBS. Preferably, the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 330, antioxidant 168, and antioxidant DLTP. Preferably, the light stabilizer is selected from one or more of light shielding agents, light absorbers, and radical trapping agents. Preferably, the light shielding agent is selected from carbon black and/or tin oxide, the light absorber is selected from UV326 and/or UV531, and the free radical trapping agent is selected from Chimassorb UV944. Preferably, the carbon black content in the high-efficiency laser marking material is not more than 2 wt%; the melt flow rate of the high-efficiency laser marking material is not more than 2.0 g/10 min. A method for preparing the above-mentioned high-efficiency laser marking material is disclosed, which includes the following steps: A) mixing HDPE resin and LLDPE resin, and adding laser additives, lubricants, antioxidants, light stabilizers and black masterbatch to mix to obtain a mixture;B) extruding the mixture into pellets to obtain high-efficiency laser marking materials. Preferably, a twin-screw extruder is used for the extrusion granulation, and the processing technology of the twin-screw extruder is: the temperature of District 1 is 210-225 °C , the temperature of District 2 is 220-235 °C , the temperature of District 3 is 230-245 °C , the temperature of District 4 is 240~255°C, the temperature of District 5 is 220~235°C, the temperature of District 6 is 230~245°C, the temperature of District 7 is 225~245°C, the temperature of District 8 is 220~235°C, the temperature of District 9 is 215~230°C, and the temperature of District 10 is 195~210°C. The screw speed is 280~350r/min, and the tank temperature is 30~40°C. Compared with the prior art, the raw materials include the following mass percentages: HDPE resin is 40 wt% ~ 80 wt%; LLDPE resin is 20 wt% ~ 60 wt%. The laser assistant is 0.3 wt% to 1 wt%, and the laser assistant is selected from two or more materials selected from the group consisting of ferroferric oxide, antimony tin oxide and mica copper phosphate; lubricant is 0.2 wt% to 1 wt%; Antioxidant is 0.3 wt%~0.5 wt%; light stabilizer is 0.1 wt%~0.6 wt%; black masterbatch is 0.5 wt%~5 wt%. In the system of formulating the high-efficiency laser marking material provided, the additional amounts of the laser auxiliary agent and the black masterbatch play a leading role in the quality of the printing effect. As the content of laser additives increases and the content of carbon black decreases, the mechanical properties of the material change very little, but the printing effect is significantly improved. In addition, the laser additives improve the absorption of the special wavelengths emitted