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Gluing aluminum-based cover plate for PCB drilling and preparing method thereof

A glue-coating, aluminum-based technology, used in coatings, devices for coating liquids on surfaces, pre-treatment surfaces, etc. The effect of reducing wire wrapping, improving hole wall roughness and prolonging service life

Inactive Publication Date: 2019-09-27
烟台柳鑫新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a glue-coated aluminum-based cover plate for PCB drilling and a preparation method thereof, aiming at solving the problems existing in existing aluminum-based cover plates when they are applied to PCB drilling. Poor hole accuracy, rough hole walls, easy wire entanglement and short drill life

Method used

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  • Gluing aluminum-based cover plate for PCB drilling and preparing method thereof
  • Gluing aluminum-based cover plate for PCB drilling and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 0.3 parts of carboxymethyl cellulose, 5 parts of polyvinylpyrrolidone (PVP-K30), 6 parts of polyvinyl alcohol, 8 parts of polyethylene glycol, and 2 parts of polyoxyethylene polypropylene ether, and add them to 40 parts of distilled water in sequence, Under the condition of 25°C, it was fully dissolved by mechanical stirring, and then 30 parts of water-based polyurethane resin, 4 parts of water-based soybean oil-rosin-based hyperbranched polyester solution, 3 parts of polypropylene glycol (PPG-400), and 1 part of leveling agent were added. part, 0.7 part of silane coupling agent, after stirring evenly, filter and stand for defoaming for later use.

[0042] The above-mentioned water-based composite polymer resin is coated on the surface of aluminum foil with a thickness of 0.10mm by a roller coating machine, the coating thickness is 0.04mm, and the speed is 6m / min. Baking line drying, the drying temperature is 100 ° C, that is, the glue-coated aluminum-based cover p...

Embodiment 2

[0044] Take 0.3 parts of carboxymethyl inulin, 6 parts of polymethacrylic acid, 9 parts of polyethylene oxide, 9 parts of polyvinyl alcohol, and 2 parts of polyoxyethylene polypropylene ether, and add them to 45 parts of distilled water in sequence. Under mechanical stirring to fully dissolve, then add 20 parts of water-based epoxy resin, 4 parts of water-based soybean oil-rosin-based hyperbranched polyester solution, 3 parts of polypropylene glycol (PPG-400), 1 part of leveling agent, silane coupling 0.7 parts of the joint agent, after stirring evenly, filter and stand for defoaming for later use.

[0045] The above-mentioned water-based composite polymer resin is coated on the surface of aluminum foil with a thickness of 0.10mm by a roller coating machine, the coating thickness is 0.04mm, and the speed is 6m / min. Baking line drying, the drying temperature is 95 ° C, that is, the glue-coated aluminum-based cover plate for PCB drilling.

Embodiment 3

[0047] Take 0.3 parts of carboxymethyl starch, 2 parts of polyvinylpyrrolidone (PVP-K90), 12 parts of polyethylene glycol, 5 parts of polyacrylamide, and 3 parts of polyoxyethylene polypropylene ether, and add them to 40 parts of distilled water in turn. Under the condition of 25°C, it was fully dissolved by mechanical stirring, and then 30 parts of acrylic modified water-based alkyd resin, 4 parts of water-based soybean oil-rosin-based hyperbranched polyester solution, and 2 parts of polypropylene glycol (PPG-400) were added. 1 part of leveling agent, 0.7 part of silane coupling agent, after stirring evenly, filter and stand for defoaming for later use.

[0048] The above-mentioned water-based composite polymer resin is coated on the surface of aluminum foil with a thickness of 0.10mm by a roller coating machine, the coating thickness is 0.04mm, and the speed is 6m / min. Baking line drying, the drying temperature is 105 ° C, that is, the glue-coated aluminum-based cover plate ...

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Abstract

The invention provides a gluing aluminum-based cover plate for PCB drilling and a preparing method thereof. The gluing aluminum-based cover plate for PCB drilling comprises aluminum foil and a water-soluble composite molecular resin layer arranged on the upper surface of the aluminum foil. The water-soluble composite molecular resin layer material comprises water-soluble hot melting resin, water-soluble bonding resin and an assistant. According to the invention, the toughness of the water-soluble composite molecular resin layer is proper, in the drill needle falling process, the guide effect is achieved, and the drilling precision is improved; meanwhile, the hot melting resin in the water-soluble composite molecular resin layer achieves the effect of lubricating a drill bit and cooling the drill needle during drilling, the hole wall roughness is effectively improved, wire winding is reduced, the drill bit temperature is reduced, the service life of the drill needle is prolonged, and in addition, the water-soluble composite molecular resin layer is good in water solubility, easy to treat after drilling, not prone to being attached into holes of a PCB and capable of ensuring drilling quality.

Description

technical field [0001] The invention relates to the field of PCB cover plates, in particular to a glue-coated aluminum base cover plate for PCB drilling and a preparation method thereof. Background technique [0002] The PCB cover plate plays the role of protecting the copper foil surface of the copper clad laminate during the PCB drilling process, improving the drilling accuracy, improving the quality of the hole wall, reducing the wear of the drill needle, reducing the temperature of the substrate, and inhibiting the front edge. With the development of the printed circuit board industry to a higher end, its requirements for drilling accuracy and hole wall quality are getting higher and higher. At present, the commonly used materials for cover plates are aluminum sheets, coated aluminum sheets, ring Oxygen glass cloth cover plate, phenolic resin plate, single-sided roughened phenolic resin plate, etc. These cover plates of different materials have their own advantages and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/16B26D7/08B26D7/00B05D7/14B05D3/02
CPCB26F1/16B26D7/08B26D7/00B05D7/14B05D3/0254B26F2210/08
Inventor 罗艳华罗小阳唐甲林
Owner 烟台柳鑫新材料科技有限公司
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