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Pad plate for hole drilling and preparation method thereof

A backing plate and modification technology, which is applied in the field of backing plate for drilling and its preparation, can solve the problems of rising production cost of backing plate, wire entanglement of drilling needles, large warping, etc., so as to improve production efficiency and process time, the effect of reducing warpage

Active Publication Date: 2016-12-07
HUNAN LIUXIN ELECTRONICS NEW MATERIAL
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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 backing plate for drilling and a preparation method thereof, aiming at solving the problems of rising production cost, large warpage, and wire entanglement of the drilling needle in the existing backing plate. plug holes etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Preparation of modified urea-formaldehyde resin

[0045] In terms of weight percentage, first add 44% formaldehyde, start stirring speed 80r / min, temperature 20°C, add 2.5% urotropine to measure pH value is 8.5, 6.5% melamine, 15% urea;

[0046] Open the steam valve, add 1 KG / C㎡ pressure to the jacket of the reaction kettle, start to heat up, and raise the temperature of the material to 70°C within 30 minutes (the reaction liquid becomes transparent at 60°C, and the pH value should be 8-8.5 at this time);

[0047] Keep warm for 30 minutes and add 14% methanol (if vacuum suction, you must open the large throttle after suction), then raise the temperature to 70°C, and keep warm for 1.5 hours. After the time is up, add 4% diethylene glycol and pass water to cool down;

[0048] Stir and cool for 40 minutes and discharge, the stirring speed is 60r / m;

[0049] Then add 10% aluminum powder to the above-mentioned released feed liquid, the stirring speed is 80r / min, and the ...

Embodiment 2

[0057] 1) Preparation of modified urea-formaldehyde resin

[0058] In terms of weight percentage, first add 42% formaldehyde, start stirring speed 90r / min, temperature 20°C, add 2% urotropine to measure pH value is 8.5, 6% melamine, 14% urea;

[0059] Open the steam valve, add 1 KG / C㎡ air pressure to the jacket of the reaction kettle, start to heat up, and raise the temperature of the material to 75°C within 30 minutes (the reaction liquid becomes transparent at 60°C, and the pH value should be 8-8.5 at this time).

[0060] Keep warm for 30 minutes and add 17% methanol (if vacuum suction, you must open the large throttle after suction), then raise the temperature to 70°C, and keep warm for 1.5 hours. After the time is up, add 5% diethylene glycol and pass water to cool down;

[0061] Stir and cool for 40 minutes and discharge, the stirring speed is 60r / m.

[0062] Then add 10% talcum powder to the feed liquid released above, the stirring speed is 80r / min, and the temperature ...

Embodiment 3

[0070] 1) Preparation of modified urea-formaldehyde resin

[0071] In terms of weight percentage, first add 46% formaldehyde, start stirring speed 90r / min, temperature 30°C, add 3% urotropine to measure pH value is 8.5, 7% melamine, 14% urea;

[0072] Open the steam valve, add 1 KG / C㎡ pressure to the jacket of the reaction kettle, start to heat up, and raise the temperature of the material to 73°C within 30 minutes (the reaction liquid becomes transparent at 60°C, and the pH value should be 8-8.5 at this time).

[0073] Keep warm for 30 minutes and add 12% methanol (if vacuum suction, you must open the large throttle after suction), then raise the temperature to 70°C, and keep warm for 1.5 hours. After the time is up, add 4% diethylene glycol and pass water to cool down;

[0074] Stir and cool for 40 minutes and discharge, stirring speed 60r / m;

[0075] Then first add 10% of the total weight of aluminum powder and wood powder mixed filler to the above-mentioned discharged fee...

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Abstract

The invention discloses a pad plate for hole drilling and a preparation method thereof. The method comprises the following steps of preparing modified urea resin; soaking paper into the modified urea resin to prepare glue soaking paper under the conditions that the temperature is 200 to 230 DEG C and the drilling speed is 20 to 25m / min; laminating a plurality of pieces of glue soaking paper; performing pressing for 90 to 120min under the conditions that the temperature is 110 to 140 DEG C and the pressure is 4 to 6MPa to obtain the pad plate. The pad plate provided by the invention is prepared from the modified urea resin and paper by using a glue soaking process through hot pressing. The pad plate has the advantages that the gelatination time of the modified urea resin is shortened; the preparation process time can be effectively improved; the production efficiency is improved; in addition, the modified urea resin is favorable for reducing the plate tilting; meanwhile, the hole plugging and needle fracturing due to adhesion of drill hole cut chips onto the needle is avoided; the material cost is reduced to a certain degree. The plate uses the urea resin system; the uniformity of the plate and the drill hole quality can be ensured through the thermoset resin features and good bonding performance.

Description

technical field [0001] The invention relates to the field of backing plates for drilling printed circuit boards, in particular to a backing plate for drilling and a preparation method thereof. Background technique [0002] Backing boards for drilling printed circuit boards require good appearance and drilling performance, as well as good cost performance. Phenolic resin laminates, epoxy resin laminates, and conventional urea-formaldehyde resin laminates on the market are affected by rising raw material prices, resulting in an increase in production costs, and the existing backing boards have large warpage, and the drilling needles are entangled and lead to plug holes. And other issues. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a backing plate for drilling and a preparation method thereof, aimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B29/00B32B27/04B32B37/10B32B37/06D21H17/51D21H17/67D21H17/68D21H17/02
CPCB32B29/005B32B37/10B32B37/12B32B2260/028B32B2260/046D21H17/02D21H17/51D21H17/67D21H17/68
Inventor 贺瑜刘飞罗小阳
Owner HUNAN LIUXIN ELECTRONICS NEW MATERIAL
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