JPH03211017A - Resin impregnating device for base - Google Patents

Abstract

PURPOSE:To control evaporation of a solvent, improve the permeation of resin varnish, realize energy saving and prevent the solvent from exploding by providing a cover encircling the route of a base on a timing section, controlling incombustible gas to be fed in ty measuring the temperature and pressure in the cover and continuously monitoring the concentration of oxygen. CONSTITUTION:A contact roll 2 and impregnation guide rolls 13 are disposed in a container 11 filled with resin varnish 3 in a first impregnation section 4 in an outer case 10 of a resin impregnating device, and a base 1 fed in is inserted therein. A cylindrical cover 7 encircling the route in which the base 1 runs through is provided all over the length of a timing section 5 to prevent the solvent from evaporating, and an inert gas feeding piping 11 is communicated with and an oxygen densitometer 2 is disposed to measure and monitor the amount of oxygen in the cover 7. Also, a temperature control device B and a pressure control device C are installed between the cover 7 and the incombustible gas feeding piping 15 to control the temperature and the pressure of incombustible gas to be fed in by measuring the temperature and pressure in the cover 7. Guide rolls 17 for impregnation are installed in container 16 filled with resin varnish 3 of a second impregnation section 6, under which the base 1 is run through.

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, in manufacturing prepreg, a base material is continuously sent to a first impregnating section, a contact roll coats and impregnates the base material with resin varnish, and the first impregnating section impregnates the base material with resin. The base material is sent to the timing section, timing is taken at the timing section (bleeding), and 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, where the base material is immersed and the resin varnish is applied. The base material is impregnated with the resin varnish in the second impregnated portion, and the base material is sent to a dryer and dried to form a 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 impregnation 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 evaporation of the solvent at the timing section, greatly improve the penetration of the resin varnish, and improve the quality of the product. To provide an apparatus for impregnating a base material with resin, which can improve energy efficiency by increasing the amount of solvent evaporated in a dryer, save energy, and prevent explosion due to an increase in solvent gas concentration at a timing part.

[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 to infiltrate the base material 1 with the resin varnish 3 impregnated in the first impregnating section 4; (
1. A cover 7 for preventing evaporation of the solvent in the timing part 5 is provided to surround the path through which the substrate 1 is fed in the timing part 5, and nitrogen, carbon dioxide, etc. are injected into the cover 7 of the timing part 5. Temperature control that connects the nonflammable gas supply pipe 15 that supplies nonflammable gas to the inside of the cover 7, measures the temperature inside the cover 7, and controls the temperature of the nonflammable gas that is supplied by the nonflammable gas supply pipe 15. a pressure control device C that measures the pressure inside the cover 7 and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipe 15; and an oxygen concentration device that continuously monitors the oxygen concentration inside the cover 7. 21 in total.

[Precautions] 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 can be suppressed. Therefore, the resin varnish 3 penetrates into the base material 1 smoothly and dries again. j! Since the amount of evaporation of the solvent in the dryer 8 is increased, the solvent can be used as fuel for the deodorizer of the dryer 8, thereby saving energy.

Further, by supplying a nonflammable gas within the range of /<-7, it is possible to prevent an explosion due to an increase in the gas concentration of the solvent. 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 temperature inside the cover 7 can be controlled. By continuously monitoring the oxygen concentration of the solvent, explosions caused by evaporating solvent can be more reliably prevented.

[Example 1] 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.

fIfJ1 impregnation section 4 is a container 1 loaded with resin varnish 3]
The contact roll 2 is placed on top of the contact roll 2, and the impregnation guide rolls 13 are placed above both sides of the contact roll 2. It can be inserted between 13 and 13. Further, a direction changing roll 14 for changing the direction of the base material 1 is arranged at the upper part of the timing section 5, and a cylindrical cover 7 is installed over the entire length so as to surround the path through which the base material 1 of the timing section 5 passes. It is a provision. 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 to measure the pressure in the nonflammable gas 7 and control 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, a temperature controller 25 that controls the on-off valve 24 of the heating medium supply pipe 15 according to the temperature measured by the temperature measuring element 22, and a non-flammable It is configured with a heat exchanger 26 that provides heat to the nonflammable gas in the gas supply pipe line 15. The pressure control device C is a low pressure gauge 27 that measures pressure changes inside the cover 7.
and two pressure controllers that control the opening and closing of the on-off valve 28 of the nonflammable gas supply pipeline 23 based on the pressure measured by the micropressure gauge 27. 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 the base material 1 is passed 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 arranged ahead of the outlet 20 of the outer box 10.

The base material 1 is paper, glass cloth, etc., and is connected from the entrance 19 of the outer box 10 to the first impregnated part 4, the timing part 5, and the second impregnated part 6.
, the outlet 20 of the outer box 10 , and the dryer 8 . resin varnish 3
As such, 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. The base material 1 impregnated with the resin in the first impregnation section 4 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), thereby preventing 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 the heat exchanger 26
The nonflammable gas passing through the nonflammable gas supply pipe 15 is heated to maintain the inside of the cover 7 at a predetermined temperature, thereby promoting penetration of the resin varnish 3 into the base material 1.

In addition, the pressure inside the cover 7 is measured by the micropressure gauge 27, nonflammable gas is supplied into the cover 7 at a corresponding pressure to control the amount of parts, and the oxygen concentration inside the cover 7 is measured by the oxygen concentration meter 21. By being continuously monitored, it is possible to manage the cover 7 so as not to alarm if an explosion occurs inside the cover 7.

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 amount. The base material 1 sent from the timing section 5 to the second impregnation section 6 is placed in the container 1
6 is dipped in the resin varnish 3, and the resin varnish 3 is applied to the base material 1.
is impregnated. The base material 1 impregnated with the resin varnish 3 in the second impregnating section 6 is sent to a squeeze roll 18, compressed, and exits from an outlet 20, and is sent to a drying Wi 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 is 1/2 to 1/2 compared to conventional methods.
The reduction was 2/3, 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 section, prevent the increase in the viscosity of the resin varnish, and improve the penetration of the resin varnish, which can greatly improve the quality of the product. By suppressing the evaporation of solvent in the dryer, 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. In addition, nonflammable gas such as nitrogen or carbon dioxide is supplied inside the cover of the timing section, so even if it is surrounded by a cover, the gas concentration of the evaporating solvent can be prevented from increasing and causing an explosion. In addition, it is equipped with a temperature control device that measures the temperature inside the cover and controls the temperature of the nonflammable gas supplied through the nonflammable gas supply pipe, so the temperature inside the cover can be kept at a predetermined temperature. It can be controlled to promote the penetration of the resin varnish into the base material, and it also measures the pressure inside the cover and controls the pressure of the nonflammable gas supplied through the nonflammable gas supply pipe. Since we are equipped with a device and an oxygen concentration meter that continuously monitors the oxygen concentration inside the cover, we can control the amount of nonflammable gas supplied into the cover and monitor the oxygen concentration to prevent an explosion. It is something.

[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. part, 7 is 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 the continuously fed base material with resin varnish using a contact roll, and 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 for dipping the base material sent from the timing part and impregnating it with resin varnish, a cover for preventing evaporation of the solvent in the timing part is attached to the timing part. A non-flammable gas supply pipe that supplies non-flammable gas such as nitrogen and carbon dioxide gas is connected to the cover of the timing section to surround the path through which the substrate is sent, 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. An apparatus for impregnating a base material with resin, comprising a control device and an oxygen concentration meter that continuously monitors the oxygen concentration within the cover.