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A laser developing material suitable for ultraviolet laser coding equipment and its application

A technology of ultraviolet laser and equipment, applied in the field of materials, can solve the problems of different laser wavelengths and affect the effect of laser printing, etc., and achieve the effect of good light transmission, safe use and good stability

Active Publication Date: 2019-08-23
上海紫日包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is mainly that the absorption wavelength of the existing laser developing material is different from the laser wavelength of the laser machine, thus affecting the laser printing effect, so it is necessary to find a developing material whose absorption wavelength is consistent with the laser wavelength

Method used

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  • A laser developing material suitable for ultraviolet laser coding equipment and its application
  • A laser developing material suitable for ultraviolet laser coding equipment and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of beverage bottle bottle cap of the present invention

[0025] At an ambient temperature of 20±5°C, weigh 10 kg of high-density polyethylene A, 0.5 kg of laser development masterbatch A and 0.2 kg of color masterbatch and mix them evenly in an automatic mixer; then put the mixture into twin-screw extrusion The feeding port of the extruder, after the equipment is preheated, the preset melting temperature is 150-200 °C, and the melting pressure is 1-2.5 MPa. After starting up, the mixed material enters the extruder, and after reaching a certain fluidity, open the connection. Capping equipment, the material is formed into a plastic bottle cap at one time by hot pressing. Use an ultraviolet laser printer to print a two-dimensional code on the top of the plastic cover, and adjust the laser printing speed according to the code reading recognition rate until it can be fully recognized.

Embodiment 2

[0026] Embodiment 2: the preparation of beverage bottle bottle cap of the present invention

[0027] At an ambient temperature of 20±5°C, weigh 10 kg of high-density polyethylene B, 0.5 kg of laser development masterbatch B and 0.2 kg of color masterbatch and mix them evenly in an automatic mixer; then put the mixture into twin-screw extrusion The feeding port of the extruder, after the equipment is preheated, the preset melting temperature is 150-200 °C, and the melting pressure is 1-2.5 MPa. After starting up, the mixed material enters the extruder, and after reaching a certain fluidity, open the connection. Capping equipment, the material is formed into a plastic bottle cap at one time by hot pressing. Use an ultraviolet laser printer to print a two-dimensional code on the top of the plastic cover, and adjust the laser printing speed according to the code reading recognition rate until it can be fully recognized.

Embodiment 3-20

[0028] Embodiment 3-20: the preparation of beverage bottle cap of the present invention

[0029] The remaining steps are the same as in Example 1, except that the raw materials and addition amount are changed, and the printing speed of the two-dimensional code is not the same. The material formula is shown in Table 1.

[0030] Table 1: the plastic bottle cap material formula of embodiment 1-20

[0031]

[0032]

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Abstract

The invention relates to the field of materials and particularly relates to a laser development material suitable for novel ultraviolet laser coding equipment and application thereof. The laser development material suitable for novel ultraviolet laser coding equipment consists of high density polyethylene, laser development master batch and color master batch in a weight part ratio of 100:(5-10):2. The invention also provides a plastic bottle cap suitable for a novel ultraviolet laser printer and a preparation method thereof. In the invention, the laser development component added can remarkably improve the printing speed of the ultraviolet laser printer on the bottle caps of some color drink bottles; the light permeability is high in visible light areas, and original color is not changed; and moreover, the laser development material has good stability and is free from toxicity and irritation and safe to use, and conditions are created for large-scale application in the industry of plastic bottle caps.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a laser developing material suitable for ultraviolet laser coding equipment and its application. Background technique [0002] With the development of Internet of Things technology, more and more manufacturers need to print QR codes on bottle caps for promotional activities. In order to adapt to market changes, laser printing equipment is gradually transitioning from the original fiber optic printer to the UV printer. Compared with fiber laser printers, the laser wavelength of UV laser printers is changed from 1064nm to 355nm. The energy of this wavelength can be normally absorbed by high-density polyethylene (HDPE), so in most cases, when using UV printers, it is not necessary to print Additional laser-developable material is added to the cap. However, the reading and recognition of the two-dimensional code is carried out through the contrast of grayscale. When printing the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K3/22C08J3/22
Inventor 王晓宇
Owner 上海紫日包装有限公司