A backing plate for PCB drilling and manufacturing method thereof
A manufacturing method and backing plate technology, which is applied in the direction of coating, epoxy resin coating, etc., can solve the problems of low backing plate hardness and poor flatness, and achieve the effects of improving surface hardness, increasing dosage, and improving coating process
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Embodiment 1
[0045]Preparation of composite resin: by weight ratio, add 50% novolac epoxy acrylic resin, 42% calcium carbonate and calcium bicarbonate, 7.5% ethyl acetate and butyl acetate slowly into the mixing tank in sequence, heat to 50°C, and stir After mixing for 40 minutes, add Irgacure 1700 0.5%, then continue to stir for 10 minutes, then cool and discharge to obtain a composite resin;
[0046] Coating process: take high-density wood fiberboard as the substrate, firstly carry out dust removal treatment on the high-density wood fiberboard, then apply the above-mentioned composite resin on the surface of the high-density wood fiberboard, and roll it with a rubber roller first, Then use an anilox roller to flatten, and then UV drying and curing; after the curing is completed, the composite resin prepared above is also coated on the lower surface of the high-density wood fiber board, and then the mat is formed by using the same coating process as the upper surface of the backing board. ...
Embodiment 2
[0049] Preparation of composite resin: by weight, 65% of novolac epoxy acrylic resin, 30% of calcium bicarbonate, aluminum oxide, 3.8% of tetrapropylene glycol diacrylate and 3.8% of trihydroxypropane triacrylate are slowly added to the stirring tank in turn , heated to 40°C, stirred and mixed for 60 minutes, then added Irgacure 1700 1.2%, then continued to stir for 15 minutes, then cooled and discharged to obtain a composite resin;
[0050] Coating process: take high-density wood fiberboard as the substrate, firstly carry out dust removal treatment on the high-density wood fiberboard, then apply the above-mentioned composite resin on the surface of the high-density wood fiberboard, and roll it with a rubber roller first, Then use an anilox roller to flatten, and then UV drying and curing; after the curing is completed, the composite resin prepared above is coated on the lower surface of the high-density wood fiber board, and then the backing board is formed by using the same c...
Embodiment 3
[0053] In terms of weight ratio, slowly add 43% of novolak epoxy acrylic resin, 48% of aluminum oxide and talcum powder, 8% of ethyl acetate, butyl acetate, methyl isobutyl ketone, and butyl ester into the stirring tank in turn, and heat to 60 ℃, stir and mix for 30 minutes, add Irgacure 1700 1.0%, then continue to stir for 12 minutes, then cool and discharge to obtain a composite resin;
[0054] Coating process: take high-density wood fiberboard as the substrate, firstly carry out dust removal treatment on the high-density wood fiberboard, then apply the above-mentioned composite resin on the surface of the high-density wood fiberboard, and roll it with a rubber roller first, Then use an anilox roller to flatten, and then UV drying and curing; after the curing is completed, the composite resin prepared above is coated on the lower surface of the high-density wood fiber board, and then the backing board is formed by using the same coating process as the top surface of the backi...
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