JPH0551478U - Coating device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a coating apparatus that prevents the tension difference between the supply side and the discharge side of a substrate of an extrusion laminator from disappearing. [Structure] A large-diameter supply roll 6 whose lower part is immersed in the activation liquid 2 in a storage tank 1, and a rubber contacting the supply roll 6 which is slightly narrower than the width of the base material 5. The small-diameter coater roll 7, the large-diameter heater roll 8 in contact with the coater roll 7, and the rubber small-diameter pinch roll 9 in contact with the heater roll 8 are used. The roller 9 and the heater roller 8 and the heater roller 8 and the coater roller 7 are passed so as to pass therethrough.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an extrusion laminator, and more particularly to an activation liquid coating device for coating the substrate surface to activate it.

[0002]

[Prior Art]

When laminating a resin film on a base material such as paper, activation of the base material surface is performed in order to facilitate the adhesion of the film to the base material surface. For this reason, generally, an aqueous solution of an aromatic compound such as toluene and acetic acid ester having a concentration of 4 to 5% is applied at a coating amount of about 4 to 5 g / m ² , dried and then laminated with a film.

As shown in FIG. 2, as the coating device, a coater roll 3 arranged so that the lower part thereof is immersed in the activation liquid 2 stored in the liquid storage tank 1 is shown in FIG. And a backup roll 4 made of rubber which is arranged so as to be in contact with the upper side of the coater roll 3, and the base material 5 is configured to pass between the coater roll 3 and the backup roll 4.

In this case, for example, 15 kg of tension is applied to the base material 5 on the supply side (dry side) and about 10 kg of the discharge side (wet side) so that the base material 5 does not have wrinkles or slack.

When the coater roll 3 is rotated (clockwise in the figure) in this state, the base material 5 is supplied from the left side and discharged to the right side. At this time, the activation liquid 2 adheres to the surface of the coater roll 3 as the coater roll 3 rotates, and is applied to the surface of the base material 5 at the contact portion with the backup roll 4.

[0006]

[Problems to be solved by the device]

 However, if the supply amount of the activation liquid 2 is too large, the activation liquid 2 accumulates between the surface of the coater roll 3 and the base material 5 on the supply side, and the activation liquid 2 flows to the back side of the base material 5. It gets in and gets in between the backup roll 4. In this case, the activating liquid 2 attached to the base material 5 is attached to a group of rolls in contact with the back side of the coated surface or a roll in the laminating portion.

On the discharge side, the base material 5 cools due to the latent heat of vaporization of the applied activating liquid 2, causing wrinkles, and depending on the base material 5, the solvent may penetrate into the base material 5. However, the process length in the next drying process becomes long and the device becomes large.

It is an object of the present invention to solve the above-mentioned problems and to provide an activating liquid coating apparatus that does not increase the size of the subsequent drying process.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in a coating device of the activation liquid 2 which is applied to activate the surface of the base material 5 as a pre-process of laminating the base material 5 with a synthetic resin film by an extrusion laminator, A large-diameter supply roll 6 whose lower part is immersed in the activation liquid 2 in the liquid storage tank 1, a rubber-made small-diameter coater roll 7 in contact with the supply roll 6, and the coater roll 7 And a small-diameter rubber pinch roll 9 in contact with the heater roll 8, and the base material 5 supplied from the feeding device is the pinch roll 9 and the aforesaid pinch roll 9. The heater roll 8 and the heater roll 8 and the coater roll 7 are passed between the heater rolls 8 and transferred to the drying device.

[0010]

【Example】

 FIG. 1 is a block diagram of the coating apparatus of the present invention. The metal-made large-diameter supply roll 6 arranged so that the lower part is immersed in the activation liquid 2 stored in the liquid-storage tank 1, and the rubber-made small-diameter supply roll 6 in contact with this supply roll 6 It comprises a coater roll 7, a large-diameter metal heater roll 8 in contact with the coater roll 7, and a rubber small-diameter pinch roll 9 in contact with the heater roll 8. The substrate 5 supplied from the above passes between the pinch roll 9 and the heater roll 8, passes between the heater roll 8 and the coater roll 7 while being in contact with the surface of the heater roll 8, and further about 1/4 turn. After being in contact with the surface of the heater roll 8, it is configured to be transferred to a drying device. A blade 10 is brought into contact with the supply roll 6 to prevent the transfer of the excess activation liquid 2.

The heater roll 8 is heated to 40 to 50 ° C. by steam or electric heat, and heats the base material 5 before applying the activation liquid 2. By doing so, the applied activating liquid 2 is heated from the back surface of the base material 5 so that the activating liquid 2 after application can be leveled, and also by the latent heat of vaporization of the activating liquid 2 after application. It is configured to prevent the temperature of the base material 5 from decreasing.

Next, the operation of the coating apparatus of the present invention will be described. The activation liquid 2 that has adhered to the supply roll 6 from the liquid storage tank 1 and has reached the coater roll 7 accumulates at the contact point between the supply roll 6 and the coater roll 7, but the excess activation liquid 2 remains as it is. It drops into the liquid storage tank 1 and adheres to the coater roll 7 by a necessary amount and is transferred.

On the other hand, the base material 5 is supplied from a feeding device (not shown), sandwiched between the pinch roll 9 and the heater roll 8 and pulled by a tension of about 15 kg on the supply side (feeding device side) of the heater roll 8. The activation liquid 2 transferred to the coater roll 7 side as it rotates and adhered to the coater roll 7 is applied between the heater roll 8 and the coater roll 7.

After that, the base material 5 is transferred to a drying device (not shown) while making about a quarter turn while being in contact with the surface of the heater roll 8. In this case, it is transferred while being pulled by a tension of about 10 kg so that wrinkles and the like do not occur.

While the base material 5 is in contact with the heater roll 8, it is preheated to 40 to 50 ° C. between the pinch roll 9 and the coater roll 7, and the activation liquid 2 is applied by the coater roll 7 and then about 1 During / 4 cycle, the temperature drop due to evaporation of the activation liquid 2 is prevented.

[0016]

[Effect of the device]

 As described above, by using the heater roll 8, the base material 5 is preheated, and the temperature drop due to the latent heat of vaporization after application of the activation liquid and the wrinkle formation of the base material 5 are prevented. The leveling of the liquid surface can be achieved and the subsequent drying process can be shortened.

Since the activating liquid 2 is indirectly supplied to the coater roll 7 which is slightly narrower than the base material width, the activating liquid 2 wraps around to the back side of the base material 5 due to excess liquid pool, The slip between the base material 5 and the heater roll 8 such as the slip phenomenon between the base material 5 and the backup roll 4 as in the conventional example does not occur, and the tension on the supply side and the discharge side of the base material 5 are not generated. It is possible to make a certain difference with the tension.

[Brief description of drawings]

FIG. 1 is a block diagram of an activation liquid coating apparatus of the present invention.

FIG. 2 is a configuration diagram of a conventional activation liquid coating apparatus.

[Explanation of symbols]

 1 Liquid Storage Tank 2 Activation Liquid 5 Base Material 6 Supply Roll 7 Coater Roll 8 Heater Roll 9 Pinch Roll 10 Blade

Claims (1)

[Scope of utility model registration request] 1. An activation liquid application apparatus for applying the activation liquid in order to activate the surface of the substrate as a pre-process for laminating the substrate with a synthetic resin film by an extrusion laminator. Large-diameter supply roll with the lower part immersed in liquid, rubber small-diameter coater roll in contact with this supply roll, large-diameter heater roll in contact with this coater roll, and this heater roll Consisting of a rubber small diameter pinch roll which is in contact with the substrate, and the substrate supplied from the feeding device passes between the pinch roll and the heater roll and between the heater roll and the coater roll and is transferred to the drying device. Coating device characterized by being configured to