JP3595876B2 - Processing method of glass cloth - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for treating glass cloth.
[0002]
[Prior art]
A glass cloth used for a wiring board of an electric device or the like is obtained by curing a glass fiber by plain weaving. The conventional processing method of this glass cloth will be described in order.
[0003]
In the first step, an end of a long glass cloth formed by plain weaving of glass fibers is adhered to the outer peripheral surface of a reel with a double-sided adhesive tape, and then the glass cloth is wound around the reel.
[0004]
In the second step, the winding shaft around which the glass cloth is wound is housed inside the heat treatment apparatus, and the glass cloth together with the winding shaft is heated with heat of 350 ° C. to 550 ° C. for 20 hours to 50 hours. The reason for this heating is that when plain weaving glass fibers, a lubricant such as starch is used to make the glass fibers slip easily, so that heating is performed to remove the lubricant.
[0005]
In the third step, the heated glass cloth is unwound from the winding shaft and washed with water.
[0006]
As a fourth step, the glass cloth washed with water is subjected to silane processing.
[0007]
The fifth step is to impregnate the silane-treated glass cloth with a thermosetting resin, stack the impregnated glass cloths, and then apply heat and pressure to cure the glass cloth into a plate shape such as a wiring board.
[0008]
[Problems to be solved by the invention]
In the above-mentioned glass cloth processing method, when the glass cloth is heated in the second step, the double-sided adhesive tape used for winding is burned, and the bonding effect between the end of the glass cloth and the outer peripheral surface of the winding shaft is lost. Would. Therefore, when the glass cloth is unwound from the winding shaft in the third step, the glass cloth is not fixed to the winding shaft, so that tension control during unwinding cannot be performed. Slip occurs with the outer peripheral surface of the glass cloth, meandering and misalignment occur, and the glass cloth is partially defective.
[0009]
In view of the above problems, the present invention provides a glass cloth processing method capable of reliably unwinding the glass cloth from the winding shaft even if the glass cloth is heated and the adhesive effect of the double-sided adhesive tape is lost.
[0010]
[Means for Solving the Problems]
According to the invention of claim 1, the end of a long glass cloth formed by plain weaving glass fibers is adhered to the outer peripheral surface of a reel with a double-sided adhesive tape, and then the glass cloth is wound around the reel. Winding step, a heat treatment step of heating the winder around which the glass cloth is wound, for a predetermined time inside a heat treatment apparatus, wherein the winder is constituted by a suction roller, and the vicinity of an end of the heated glass cloth is formed by the winder. An unwinding step of unwinding the glass cloth from the winding shaft while suctioning the outer peripheral surface, a washing step of washing the unwound glass cloth with water, and a silane processing step of performing silane processing on the washed glass cloth. A curing step of curing the glass cloth subjected to the silane processing.
[0011]
According to the invention, in the unwinding step, the glass cloth is unwound while suctioning the vicinity of the end of the heated glass cloth to the outer peripheral surface of the winding shaft formed of the suction roller. It can be fixed to the surface to control the tension, and no meandering or misalignment occurs.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a method for treating glass cloth according to one embodiment of the present invention will be described with reference to FIG.
[0013]
FIG. 1 is a longitudinal sectional view of a winding shaft 12 for winding a glass cloth 10.
[0014]
The cylindrical winding shaft 12 has a plurality of suction holes 14 formed of punch holes on the outer peripheral surface thereof. Further, a lot shaft 16 is provided inside the winding shaft 12, the lot shaft 16 has a cylindrical shape, and a suction hole 18 is provided on the outer peripheral surface. The right end of the lot shaft 16 forms an opening 20.
[0015]
When the glass cloth 10 is wound by the winding shaft 12, the winding shaft 12 is provided between the pair of arms 22 and 24, and when the driving arm 22 is rotated, the winding shaft 12 also rotates. . In this case, a suction passage 26 is provided in the arm portion 24 on the driven side, and a pump 28 for sucking air is provided at the tip of the suction passage 26.
[0016]
Then, air is sucked by the pump 28, air is sucked from the suction hole 18 through the suction passage 26 and the lot shaft 16, and air is further sucked from the suction hole 14 on the outer peripheral surface of the winding shaft 12. Reference numeral 12 serves as a suction roller.
[0017]
A process of processing a glass cloth using the winding shaft 12 having the above configuration will be described.
[0018]
(First step)
The end portion of the long glass cloth 10 formed by plain weaving glass fibers and the outer peripheral surface of the reel 12 are fixed with a double-sided adhesive tape 30. Then, the reel 12 is rotated between the pair of arms 22 and 24, and the long glass cloth 10 is wound around the reel 12.
[0019]
(2nd process)
Since the glass cloth is coated with a lubricant such as starch to make the glass fibers slippery when plain weaving the glass fibers, it is necessary to remove the lubricant. Therefore, the reel 12 is removed from the pair of arms 22 and 24, and the reel is housed in the heat treatment apparatus together with the reel, and the glass cloth 10 is heated at a temperature of 350 ° C. to 550 ° C. for 20 hours to 50 hours. Thus, the lubricant applied to the glass fiber is removed.
[0020]
(3rd step)
The winding shaft 12 around which the heated glass cloth 10 is wound is again installed between the pair of arms 22 and 24, and the glass cloth 10 is unwound. In this case, the heating in the second step burns the double-sided adhesive tape 30 and loses the adhesive effect. Therefore, the pump 28 is operated to suck the glass cloth 10 on the surface of the reel 12.
[0021]
Thereby, even if the double-sided adhesive tape 30 is not provided, the end of the glass cloth 10 can be fixed to the winding shaft 12 and unwound, so that tension control during unwinding can be performed, and the length of the unwound glass cloth can be controlled. You can also calculate the remaining amount. Furthermore, meandering between the winding shaft 12 and the glass cloth 10 is prevented, and a defect due to misalignment of the cloth does not occur.
[0022]
(4th process)
The glass cloth unwound as described above is washed with water.
[0023]
(Fifth step)
The washed glass cloth is subjected to silane processing with a silane coupling agent of an organosilicon compound. This silane processing is a step for increasing the reinforcing effect of the matrix.
[0024]
(Sixth step)
The silane-processed glass cloth is impregnated with a thermosetting resin, and the impregnated glass cloth is laminated and then heated and pressed to be cured as a plate-like glass cloth. Thereby, a plate material such as a wiring board is obtained.
[0025]
As described above, since the winding shaft 12 of the present embodiment is a suction roller, the end of the glass cloth can be sucked at the time of unwinding and can be drawn out with a constant tension. Can be automatically detected, and when the remaining amount becomes small, the reel 12 can be automatically replaced.
[0026]
Further, since the glass cloth 10 can be pulled out with a constant tension, the quality can be stabilized.
[0027]
Further, since no slip occurs between the winding shaft 12 and the glass cloth, the glass cloth does not meander on the winding shaft 12.
[0028]
【The invention's effect】
As described above, according to the glass cloth processing method of the present invention, the glass cloth can be unwound with a constant tension when unwinding the glass cloth from the winding shaft, so that the quality of the product is stable and the glass cloth is meandering in a winding shaft shape. Nothing to do.
[0029]
Further, since the unwinding amount can be detected, when the unwinding amount is reduced, it is possible to automatically replace the winding shaft with another winding shaft.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a winding shaft showing one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Glass cloth 12 Reel 14 Suction hole 28 Pump 30 Double-sided adhesive tape

Claims (1)

After bonding the end of a long glass cloth formed by plain weaving glass fibers to the outer peripheral surface of a reel with a double-sided adhesive tape, a winding step of winding the glass cloth around the reel,
A heat treatment step of heating the winding shaft around which the glass cloth is wound, for a predetermined time inside the heat treatment apparatus,
An unwinding step in which the winding shaft is formed by a suction roller, and unwinds the glass cloth from the winding shaft while suctioning the vicinity of the end of the heated glass cloth to the outer peripheral surface of the winding shaft;
A washing step of washing the unwound glass cloth with water,
A silane processing step of performing silane processing on the washed glass cloth,
A curing step of curing the glass cloth subjected to the silane processing,
A method for treating a glass cloth, comprising:

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