Cesium-tungsten bronze heat absorbent, preparation thereof and application of cesium-tungsten bronze heat absorbent in transparent ABS infrared welding

A technology of cesium tungsten bronze and endothermic agent, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of unattainable aesthetic effect, dark color of welding place, poor aging resistance, etc. Good laser fusion welding effect, smooth weld seam, simple composition effect

Pending Publication Date: 2021-11-23
烟台佳隆纳米产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a dark heat-absorbing agent is added to the transparent ABS plastic, although the heat-absorbing and melting effect can be achieved, the color of the welding part is dark, and it is difficult to maintain high transparency, which cannot meet the aesthetic effect required by the market.
[0005] Patents CN1250625C and CN100484994C disclose a resin composition suitable for laser welding. These two patents provide a dye salt infrared absorber and need to be used in conjunction with a colorant. The infrared absorber is an organic infrared absorber with poor aging resistance , mainly used in laser welding of dark-colored products, not suitable for light-colored or high-transparency products

Method used

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  • Cesium-tungsten bronze heat absorbent, preparation thereof and application of cesium-tungsten bronze heat absorbent in transparent ABS infrared welding
  • Cesium-tungsten bronze heat absorbent, preparation thereof and application of cesium-tungsten bronze heat absorbent in transparent ABS infrared welding
  • Cesium-tungsten bronze heat absorbent, preparation thereof and application of cesium-tungsten bronze heat absorbent in transparent ABS infrared welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Preparation of cesium tungsten bronze slurry: 5.7kg of toluene solvent and 0.3kg of dispersant were mixed and stirred for 30 minutes, and then 4.0kg of cesium tungsten bronze powder (Cs 0.2 WO 3 ), continue stirring and mixing for 30min, and the mixed slurry is ground to obtain a cesium tungsten bronze slurry with an average particle size of 60.03nm, and the particle size distribution is as follows: figure 2 .

[0033] Step 2. Preparation of cesium tungsten bronze endothermic agent: mix and stir 8.0kg transparent ABS resin (D90:100um), 1.5kg cesium tungsten bronze slurry, 0.2kg leveling agent, and 0.2kg acrylonitrile resin for 60 minutes to obtain cesium tungsten Bronze infrared heat absorber.

[0034] The cesium tungsten bronze endothermic agent prepared in Example 1 was applied to the place to be welded by 3D printing, and then welded. The welding test results are shown in Table 1.

Embodiment 2

[0036] Step 1. Preparation of cesium tungsten bronze slurry: 4.5kg ethyl acetate and 0.5kg dispersant were mixed and stirred for 30min, then 5.0kg cesium tungsten bronze powder (Cs 0.3 WO 3 ), continue to stir and mix for 30min, and the mixed slurry is ground to obtain a cesium tungsten bronze slurry with an average particle diameter of 66.34nm, and the particle size distribution is as follows: image 3 .

[0037] Step 2. Preparation of cesium tungsten bronze endothermic agent: 8.6kg transparent ABS resin (D90:200um), 1.0kg cesium tungsten bronze slurry, 0.3kg leveling agent, 0.1kg acrylonitrile resin were stirred and mixed for 60 minutes to obtain cesium tungsten Bronze infrared heat absorber.

[0038] The cesium tungsten bronze endothermic agent prepared in Example 2 was applied to the place to be welded by silk screen printing, and then welded. The welding test results are shown in Table 1.

Embodiment 3

[0040] Step 1. Preparation of cesium tungsten bronze slurry: Mix and stir 5.1kg methyl ethyl ketone and 0.4kg dispersant for 30min, then add 4.5kg cesium tungsten bronze powder (Cs 0.32 WO 3 ), continue stirring and mixing for 30min, and the mixed slurry is ground to obtain a cesium tungsten bronze slurry whose average particle size is 73.99nm, and the particle size distribution is as follows: Figure 4 .

[0041] Step 2. Preparation of cesium tungsten bronze endothermic agent: 8.3kg of transparent ABS resin (D90:150um), 1.3kg of cesium tungsten bronze slurry, 0.25kg of leveling agent, and 0.17kg of acrylonitrile resin were stirred and mixed for 60 minutes to obtain cesium tungsten Bronze infrared heat absorber.

[0042] The cesium tungsten bronze endothermic agent prepared in Example 3 was coated on the place to be welded by 3D printing, and then welded. The welding test results are shown in Table 1.

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Abstract

The invention relates to the technical field of laser welding plastic preparation, in particular to a cesium-tungsten bronze heat absorbent, preparation thereof and application of the cesium-tungsten bronze heat absorbent in transparent ABS infrared welding. The cesium-tungsten bronze heat absorbent is prepared from, by mass, 80-86% of transparent ABS resin, 10-15% of cesium-tungsten bronze slurry, 2-3% of a flatting agent and 1-2% of acrylonitrile resin. The cesium-tungsten bronze slurry comprises the following components: 40-50% of cesium-tungsten bronze powder, 45-57% of a solvent and 3-5% of a dispersant, and the molecular formula of cesium-tungsten bronze is Cs0.2WO3 or Cs0.3WO3 or Cs0.32WO3. The cesium-tungsten bronze heat absorbent has the beneficial effects that a formed welding seam is smooth and free of weld beading, the light transmittance is greater than 80%, the welding seam is colorless and transparent, and the tensile strength is high; and the cesium-tungsten bronze heat absorbent is applied to a welded position in a 3D printing or silk-screen printing manner, the shape of the welded position is changed at will according to the welding requirement, and the characteristics that the product structure is changeable and welding is complex are met.

Description

technical field [0001] The invention relates to the technical field of laser welding plastic preparation, in particular to a cesium tungsten bronze heat absorbing agent and its preparation and application in transparent ABS infrared welding. Background technique [0002] Laser welding is to use high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses to the inside of the material through heat conduction, and a heat source area with highly concentrated energy is formed at the welded part in a short time, so that It is melted by the solder and forms a fixed spot or weld. [0003] At present, when infrared laser is used to weld plastics, an infrared heat absorbing agent is generally placed between two plates to be welded, and the infrared heat absorbing agent is irradiated with a laser to melt the two layers of plastic, and after cooling, laser welding of the corresponding plastic parts is realized. Purpose. [0004] Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K35/40B29C65/16
CPCB23K35/3613B23K35/40B29C65/16B29C65/1683
Inventor 岳都元栾奕贾志忠
Owner 烟台佳隆纳米产业有限公司
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