Patent Application
20060062996
1. Field of the Invention
The invention relates to a high-grade resin matrix composite with aluminum for lubrication in drilling, and in particular, to a high-grade resin matrix composite with aluminum for lubrication in drilling, characteristic in that it can reduce effectively the needle breaking ratio during drilling an electric board, simplifies the types of resin used and can promote production efficiency to achieve the goal of mass production, and, accordingly, is suitable for applying in an equipment for drilling an electric board.
2. Description of the Prior Art
In recent years, as the electronic technology is continuously improved, and numerous high technical electronic industries are emerging successively, more humanized and better functional electronic products are putting new ideas based on old things constantly, and these electronic products are developing continuously on a trend toward a design of low weight, as well as thin, short and small size. In every type of an electronic product, there is at least a main board consisting of many electronic elements and circuit board. The function of the circuit board comprises of supporting and connecting electrically individual electronic elements such that these electronic elements can be connected electrically with one another. The commonest circuit board at present is the printed circuit board (PCB).
A printed circuit board can connect electronic parts with one another to exert their integral function and hence is an undependable basic constitutive part in all electronic information products. Since the quality of the design of a printed circuit board not only affects the reliability of an electronic product, but also plays an important role in the competitive ability of the system, PCB is frequently called as “the mother of an electronic system product” or “the base of 3C industry”. A printed circuit board is a flat plate made of a non-conductive material. This plate is usually designed to have pre-drilled holes for installing chips and other electronic elements. Holes on elements facilitate electronically connecting printed metallic circuits pre-defined on the surface of the board. Upon penetrating connecting legs of the element through PCB, a circuit can be formed by adhering the element on the PCB with a conductive metallic welder.
However, during drilling the electric board, breakage of the drilling needle takes place frequently. Modem technology takes advantage of applying a water soluble resin over a aluminum foil to form a buffering material which, when disposing on the electric board to be drilled, the reduction of needle breaking ratio can be achieved by virtue of the wetting and buffering functions from the water soluble resin and the heat-dissipating function from the aluminum foil. Nevertheless, due to the multiplicity of formulations constituting a conventional buffering material, not only the manufacturing process is complex and the production rate becomes low, but also the stability of drilling using these buffering material is insufficient.
In view of those disadvantages associated with the conventional technique, the inventor devoted to improve it and provided finally, after an intensive study for many years, a high grade resin matrix composite with aluminum for lubrication in drilling, which can simplify the type of the resin used in the conventional technique so that the production rate can be increased to achieve the purpose of mass production, and at the same time, the needle breaking ratio can be lowered and the drilling accuracy can be raised effectively.
One object of the invention is to provide a high-grade resin matrix composite with aluminum for lubrication in drilling, characteristic in that it can simplify the type of the resin used in the conventional technique so that the production rate can be increased to achieve the purpose of mass production.
Another-object of the invention is to provide a high-grade resin matrix composite with aluminum for lubrication in drilling, characteristic in that it can decrease the needle-breaking rate and increase effectively the drilling accuracy.
In order to achieve the above-described objects, the high grade resin matrix composite with aluminum for lubrication in drilling comprises a resin matrix composite and an aluminum foil, wherein said resin matrix composite is consisting of at least three of polyethylene glycol (PEG), polyvinyl alcohol, polyoxyethylene sorbitan laurate, polyethylene glycol lauryl ether, polyethylene glycol nonyl ether, castor oil polyethylene glycol ether, polyethylene glycol octyl ether, polyoxypropylene polyoxyethylene ether, amylum, glycerol, inorganic filler and solvents; and wherein said resin matrix composite can bind said aluminum foil through one of roller coating, spin coating, film coating, static spray coating, and halftone printing, to form a resin matrix composite with aluminum for applying over an electric board.
The invention, as well as its many advantages, may be further understood by the following detailed description and drawings in which:
As described above, the invention provides a high-grade resin matrix composite with aluminum for lubrication in drilling, characteristic in that it comprises a resin matrix composite and an aluminum foil, wherein said resin matrix composite is consisting of at least three of polyethylene glycol (PEG), polyvinyl alcohol, polyoxyethylene sorbitan laurate, polyethylene glycol lauryl ether, polyethylene glycol nonyl ether, castor oil polyethylene glycol ether, polyethylene glycol octyl ether, polyoxypropylene polyoxyethylene ether, amylum, glycerol, inorganic filler and solvents. As the inorganic filler, mention can be made of silicon dioxide (SiO2), aluminum hydroxide (Al(OH)3), aluminum oxide (Al2O3), titanium dioxide (TiO2), calcium carbonate (CaCO3). Suitable solvent useful in the invention may be water (H2O)m methanol (CH3OH), ethanol (C2H5OH), acetone (C3H7) or mixture thereof.
Referring to
Among components used in the resin of the composite with aluminum according to the invention, structure of PEG can be represented as follows:
HOCH2(CH2OCH2)nCH2OH;
PVA as:
(CH2CHOH)n(CH2CHOOCCH3)m
polyoxyethylene sorbitan laurate as:
polyethylene glycol lauryl ether as:
polyethylene glycol nonyl ether as:
castor oil polyethylene glycol ether as:
polyethylene glycol octyl ether as:
and
polyoxypropylene polyoxyethylene ether as:
The invention will be illustrated by following non-limiting Examples, which demonstrate the formulation of four preferred experiment-proved resins according to the invention.
A resin is formulated by blending 41 wt %˜61 wt % of PEG with a molecular weight of 4000, 36 wt %˜56 wt % of PVA and 1 wt %˜5 wt % of polyethylene glycol nonyl ether, as shown in
A resin is formulated by blending 41 wt %˜61 wt % of PEG with a molecular weight of 3000, 36 wt %˜56 wt % of PVA, and 1 wt %˜3 wt % of polyethylene glycol lauryl ether, as shown in
A resin is formulated by blending 32 wt %˜52 wt % of PEG with a molecular weight of 3000, 20 wt %˜40 wt % of PVA, 1 wt %˜3 wt % of polyoxyethylene sorbitan laurate and 10 wt %˜20 wt % of an inorganic filler, while adding 6˜16 wt % of acetone to adjust its viscosity, as shown in
A resin is formulated by blending 94 wt %˜98 wt % of PVA, 1 wt %˜3 wt % of polyoxyethylene sorbitan laurate, and 1 wt %˜3 wt % of polyethylene glycol nonyl ether, as shown in
According to test results, the resin matrix composite with aluminum exhibits several following advantages over the conventional product:
Accordingly, the object of the invention can be achieved by providing a high grade resin matrix composite with aluminum for lubrication in drilling, characteristic in that it can simplify the type of resins to be used, and can increase production efficiency to achieve the goal of mass production, indicating the improved applicability for industries of the invention.
While the invention has been described with reference to preferred embodiments thereof, it should be understood that the scope of the invention is not limited by these embodiments. Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of appended claims.
