JPH0586887B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention manufactures prepreg etc. by continuously feeding a base material such as paper or glass cloth and impregnating the base material with a resin such as a phenol resin or an epoxy resin. It relates to the equipment used to do this.

[Prior Art] Generally, when producing prepreg, a base material is continuously sent to a first impregnating section, a resin varnish is applied and impregnated onto the base material using a contact roll, and the resin is applied to the base material in the first impregnating section. The impregnated base material is sent to the timing section, where the timing is taken (breathing).
The base material is impregnated with the resin varnish, and then the base material is sent from the timing section to the second impregnation section to immerse the base material to impregnate the base material with the resin varnish, and the base material is impregnated with the resin varnish at the second impregnation section. The material is sent to a dryer and dried to form prepreg.

[Problems to be Solved by the Invention] Conventionally, however, since the base material is fed in an open state in the timing section, the solvent of the resin varnish impregnated in the first impregnating section tends to evaporate, and the evaporation of the solvent causes the coating to deteriorate. There is a problem in that the viscosity of the impregnated resin varnish increases and the penetration of the resin varnish is inhibited. Furthermore, since the solvent evaporates in the timing section, the amount of solvent that evaporates in the dryer during drying is reduced and is not used as energy to be burned in the deodorizer. In other words, the evaporated solvent is used as part of the fuel for the deodorizing machine that treats the exhaust air from the dryer, but if the amount of evaporated solvent is small, extra fuel is required and no energy-saving effect can be achieved.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to suppress the evaporation of the solvent at the timing section, significantly improve the penetration of the resin varnish, and improve the quality of the product. can improve
Moreover, it is an object of the present invention to provide an apparatus for impregnating a base material with resin, which can save energy by increasing the amount of solvent evaporated in the dryer, and can prevent explosions due to an increase in the concentration of solvent gas in the timing section.

[Means for Solving the Problems] In order to achieve the above object, the apparatus for impregnating a base material with resin of the present invention includes a first impregnation process in which a resin varnish 3 is coated and impregnated on a continuously fed base material 1 using a contact roll 2. a timing section 5 that takes timing for impregnating the base material 1 with the resin varnish 3 impregnated in the first impregnating section 4; In the apparatus for impregnating a base material with resin and having a second impregnating part 6 for impregnating the base material 3, a cover 7 for preventing evaporation of the solvent in the timing part 5 is provided so as to surround the route through which the base material 1 is sent in the timing part 5. A nonflammable gas supply conduit 15 for supplying nonflammable gas such as nitrogen or carbon dioxide into the cover 7 of the timing section 5 is communicated with the cover 7, and the temperature inside the cover 7 is measured and the nonflammable gas is detected. A temperature control device B that controls the temperature of the nonflammable gas supplied through the supply pipe 15, and a pressure control device that measures the pressure inside the cover 7 and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipe 15. Device C
and an oxygen concentration meter 21 that continuously monitors the oxygen concentration within the cover 7.

[Function] When the base material 1 impregnated with the resin varnish 3 in the first impregnation section 4 passes through the timing section 5, it passes through a path surrounded by the cover 7, so that evaporation of the solvent is suppressed. Therefore, the resin varnish 3 penetrates smoothly into the base material 1, and the amount of solvent evaporated in the dryer 8 increases, so that the solvent is used as fuel for the deodorizer of the dryer 8, thereby saving energy. can be achieved. Furthermore, by supplying nonflammable gas into the cover 7, explosions due to an increase in the gas concentration of the solvent can be prevented. In addition, the temperature of the nonflammable gas fed into the cover 7 can be controlled to promote the penetration of the resin varnish 3 into the base material 1, and the pressure of the nonflammable gas fed into the cover 7 can be controlled and the oxygen inside the cover 7 can be controlled. By continuously monitoring the concentration, explosions caused by evaporating solvent can be more reliably prevented.

[Example] A first impregnating section 4, a timing section 5, and a second impregnating section 6 are housed inside an outer box 10 of a resin impregnating apparatus. The first impregnation part 4 is formed by arranging the contact roll 2 on the upper part of the container 11 loaded with the resin varnish 3, and arranging the impregnation guide rolls 13 above both sides of the contact roll 2. The supplied base material 1 can be inserted between the contact roll 2 and the impregnation guide roll 13. Further, a direction changing roll 14 for changing the direction of the base material 1 is disposed above the timing section 5.
A cylindrical cover 7 surrounds the path through which the base material 1 passes.
are provided along the entire length. A nonflammable gas supply conduit 15 for supplying nonflammable gas is communicated within the cover 7. Further, the cover 7 is provided with an oxygen concentration meter 21 for measuring the amount of oxygen within the cover 7. Further, between the cover 7 and the nonflammable gas supply pipe 15, there is a temperature control device B that measures the temperature inside the cover 7 and controls the temperature of the nonflammable gas supplied by the nonflammable gas supply pipe 15, and a cover A pressure control device C is provided which measures the pressure in the nonflammable gas 7 and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipe 15. The temperature control device B includes a temperature measuring element 22 that measures the temperature inside the cover 7, and a temperature controller 25 that controls the opening/closing valve 24 of the heating medium supply pipe 15 according to the temperature measured by the temperature measuring element 22.
and a heat exchanger 26 that provides heat to the nonflammable gas in the nonflammable gas supply pipe 15. The pressure control device C includes a micro-pressure gauge 27 that measures pressure changes within the cover 7, and a pressure controller 29 that controls opening and closing of the on-off valve 28 of the nonflammable gas supply pipe 23 based on the pressure measured by the micro-pressure gauge 27. It is configured. The second impregnation section 6 is formed by providing a dipping guide roll 17 in a container 16 loaded with the resin varnish 3, and passing the base material 1 under the dipping guide roll 17. A squeeze roll 18 is provided near the outlet 20 of the outer box 10 above the second impregnation section 6, and a dryer 8 is provided ahead of the outlet 20 of the outer box 10.

The base material 1 includes paper, glass cloth, etc., and the outer box 1
The liquid can be fed from the inlet 19 of 0 to the first impregnating section 4, the timing section 5, the second impregnating section 6, the outlet 20 of the outer box 10, and the dryer 8 in this order. As the resin varnish 3, phenol resin, epoxy resin, etc. are used. When the base material 1 is sent to the first impregnating section 4, a resin varnish 3 is applied and impregnated with the contact roll 2. At this time, since the coating is performed using the contact roll 2, the resin varnish 3 is impregnated with the resin varnish 3 while the air contained in the base material 1 is deaerated. First impregnation part 4
The base material 1 impregnated with the resin is sent to the timing section 5, and as time passes, the base material 1 is impregnated with the resin varnish 3. At this time, since the path through which the base material 1 is sent is covered with the cover 7, evaporation of the solvent of the resin varnish 3 is suppressed, and penetration of the resin varnish 3 is performed smoothly. In addition, a nonflammable gas such as nitrogen or carbon dioxide is supplied from the nonflammable gas supply pipe 15 to purge the evaporated solvent inside the cover 7 (purge) to prevent an explosion due to an increase in the concentration of solvent gas. There is. Furthermore, the temperature inside the cover 7 is measured by the temperature measuring element 22, and in accordance with the measured temperature, the nonflammable gas passing through the nonflammable gas supply pipe 15 is heated by the heat exchanger 26, and the inside of the cover 7 is maintained at a predetermined temperature. As a result, the penetration of the resin varnish 3 into the base material 1 is promoted. In addition, the pressure inside the cover 7 is measured by the micropressure gauge 27, and nonflammable gas is supplied to the cover 7 at the corresponding pressure.
By controlling the amount of barge and continuously monitoring the oxygen concentration inside the cover 7 with the oxygen concentration meter 21, it is possible to manage the inside of the cover 7 to prevent it from becoming explosive. Furthermore, the end A of the cover 7 on the second impregnated portion 6 side is immersed in the resin varnish 3 of the container 16, thereby reducing air circulation and stabilizing the temperature and oxygen content. The base material 1 sent from the timing section 5 to the second impregnating section 6 is dipped in the resin varnish 3 in the container 16,
A base material 1 is impregnated with a resin varnish 3. The base material 1 impregnated with the resin varnish 3 in the second impregnating section 6 is sent to the squeeze roll 18 and squeezed, and the outlet 2
0 and sent to the dryer 8 to be dried. By being heated in the dryer 8, much of the solvent of the resin varnish 3 evaporates, and the evaporated solvent is used as part of the fuel for the deodorizer, thereby reducing the amount of fuel used in the deodorizer. In fact, fuel consumption was reduced to 1/2 to 2/3 compared to conventional methods, resulting in energy savings.

In addition, although the above-mentioned example described the production of prepreg, it can be similarly implemented in the production of copper-clad laminates.

[Effects of the Invention] As described above, the present invention is provided with a cover for preventing evaporation of the solvent in the timing part so as to surround the path through which the base material is fed in the timing part. It is possible to suppress the evaporation of the applied and impregnated resin varnish at the timing part, prevent the increase in the viscosity of the resin varnish, improve the penetration of the resin varnish, and significantly improve the quality of the product.
In addition, by suppressing the evaporation of solvent in the timing section, the amount of solvent evaporated in the dryer can be increased, and the evaporated solvent can be used as fuel for the deodorizer, reducing the amount of fuel used by the deodorizer and saving energy. Moreover, there is no nitrogen inside the cover of the timing section.
Since nonflammable gas such as carbon dioxide gas is supplied, even if the solvent is surrounded by a cover, the gas concentration of the evaporating solvent can be prevented from increasing and an explosion can be prevented, and the temperature inside the cover can be reduced. Equipped with a temperature control device that measures and controls the temperature of the nonflammable gas supplied through the nonflammable gas supply pipe, the temperature inside the cover can be controlled to a predetermined temperature and the resin varnish penetrates into the base material. Furthermore, it is equipped with a pressure control device that measures the pressure inside the cover and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipe, and an oxygen concentration meter that continuously monitors the oxygen concentration inside the cover. Since the cover is provided with the following, the amount of nonflammable gas supplied into the cover can be controlled, and the oxygen concentration can be monitored to prevent an explosion.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of an embodiment of the present invention, in which 1 is a base material, 2 is a contact roll, 3 is a resin varnish, 4 is a first impregnated part, 5 is a timing part, and 6 is a second impregnated part. 7 is a cover, 15 is a nonflammable gas supply pipe, 21 is an oxygen concentration meter, B is a temperature control device, and C is a pressure control device.

Claims (1)

[Claims] 1. A first impregnating section that applies and impregnates a continuously fed base material with resin varnish using a contact roll; a timing section that takes timing to infiltrate the base material with the resin varnish impregnated in the first impregnating section; In an apparatus for resin impregnating a base material, which has a second impregnating part in which the base material sent from the first part is immersed and impregnated with resin varnish, a cover is attached to the base material in the timing part to prevent evaporation of the solvent in the timing part. A non-flammable gas supply pipe is provided to surround the route through which the material is sent, and a non-flammable gas supply pipe for supplying non-flammable gas such as nitrogen or carbon dioxide is communicated within the cover of the timing section, and the temperature inside the cover is measured. A temperature control device that controls the temperature of the nonflammable gas supplied through the nonflammable gas supply pipeline, and a pressure control device that measures the pressure inside the cover and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipeline. and an oxygen concentration meter that continuously monitors the oxygen concentration within the cover.