JPH03211018A - Resin impregnating device for base - Google Patents

Abstract

PURPOSE:To control evaporation of a solvent, improve the permeation of resin varnish, increase the evaporation amount of the solvent in a dryer and realize energy saving by providing a cover encircling the route of a base in a timing section and feeding incombustible gas such as nitrogen, carbon dioxide gas or the like into the cover. 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. Also, a cylindrical cover 7 is provided in a manner of encircling the route in which a base 1 runs all through the whole length of a timing section 5, and incombustible gas feeding piping 15 is communicated with and an oxygen densitometer 21 for measuring the amount of oxygen is disposed therein. Immersion guide rolls 17 are installed in a container 16 in which resin varnish 3 of a second impregnation section 6 is filled, under which the base 1 is run through. The evaporation of the solvent of resin varnish 3 is controlled by the cover 7 to smoothen the permeation of resin varnish 3, and the solvent evaporated by the feeding of incombustible gas such as nitrogen, carbon dioxide gas or the like is driven to prevent the explosion generated by the increase of gas concentration.

Description

[Detailed description of the invention] [Industrial application field] The present invention continuously feeds a base material such as paper or glass cloth and impregnates the base material with a resin such as a 7-enol resin or an epoxy resin to form a prepreg or the like. It relates to the equipment used for manufacturing.

[Prior art 1] Generally, when 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 (breathing), and the base material is impregnated with the resin varnish.The base material is then sent from the timing section to the second impregnation section, where the base material is soaked 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 evaporated in the dryer during drying is reduced, and the energy used for combustion in the deodorizer is not used. 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 the evaporation of solvent in a dryer and save energy by increasing the amount of solvent evaporated in a dryer.

[Means for Solving the Problems 1] 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 with a contact roll 2 on a continuously fed base material 1. A timing section 5 takes timing to infiltrate the base material 1 with the resin varnish 3 impregnated in the first impregnating section 4, and a timing section 5 which soaks the base material 1 sent from the timing section 5 into the resin. In the apparatus for impregnating a base material with resin and having a second impregnating section 6 impregnated with varnish 3, a timing section 5 is provided.
Attach the cover 7 to the timing section 5 to prevent solvent evaporation.
It is characterized in that it is provided so as to surround the path through which the base material 1 is sent, and is configured to supply nonflammable gas such as nitrogen or carbon dioxide gas into the cover 7 of the timing section 5.

[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 energy can be saved by using the solvent as fuel for the deodorizing machine of the dryer 1fi8.

Furthermore, by supplying nonflammable gas into the cover 7, explosions due to an increase in the gas concentration of the solvent can be prevented.

[Example] Inside the outer box 10 of the resin impregnation device, there are a first impregnation section 4 and a - The timing section 5 and the second impregnation section 6 are internally provided.

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 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 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. Also, on the cover 7 is an oxygen concentration meter 2 that measures the amount of oxygen inside the cover 7.
1 is arranged. 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 in this order. As the resin varnish 3, phenol resin, epoxy resin, etc. are used. Base material 1 is the first
When delivered to the impregnating section 4, the resin varnish 3 is applied and impregnated with the contact roll 2. Since the coating is performed using the outer 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. Resin varnish 3 in the first impregnated part 4
The base material 1 impregnated with the resin varnish 3 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 expel the evaporated solvent inside the cover 7 (parts), thereby preventing an explosion due to an increase in the concentration of solvent gas. There is. Furthermore, the oxygen concentration within the cover 7 is measured by an oxygen concentration meter 21, and managed to prevent an explosion. In addition, the end A of the cover 7 on the second impregnation section 6 side is connected to the container 16.
This reduces air circulation and stabilizes 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, and the base material 1 is impregnated with the resin varnish 3. The base material 1 impregnated with the resin varnish in the second impregnating section 6 is sent to the squeeze roll 18, compressed, and exits from the outlet 20, and is sent to the drying fi8 to be dried. In the dryer 8, much of the solvent of the resin varnish is evaporated by heating, 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 reality, fuel consumption is 1/2 to 2 compared to conventional methods.
/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.

7- [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, so that the base material is not evaporated in the first impregnation part. It is possible to suppress the evaporation of the resin varnish applied and impregnated onto the material 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, since non-flammable gas such as nitrogen and carbon dioxide is supplied inside the cover of the timing section, even if the cover is used to surround the timing section, the gas concentration of the evaporating solvent can be prevented from increasing and an explosion can occur. This is something that can be prevented.

[Brief explanation of drawings]

Figure #1 is a schematic cross-sectional view of one embodiment of the present invention, in which 1 is a base material, 2 is a contact roll, 3 is a resin varnish, 84 is a first impregnation part, 5 is a timing part, and 6 is a second part. 7 is a cover.

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. 1. An apparatus for impregnating a base material with resin, characterized in that the apparatus is provided so as to surround a path through which the base material is fed, and a nonflammable gas such as nitrogen or carbon dioxide gas is supplied into a cover of a timing section.