JPH03290244A - Activator applying device - Google Patents

Abstract

PURPOSE:To prevent a generation of bubbles at a separation point of a film and an applying roll so as to prevent an unevenness of an activator by providing the applying roll which holds the activator on the peripheral surface and rotates, a press roll for pressing a film to the applying roll, and a hot air blasting device for blasting a hot air to an outlet at a nip of the applying roll and the press roll. CONSTITUTION:A film 11 of which a print layer is being at the underside is pulled out from a roll 11A. An applying roll 15 of an activator applying device 12 and a press roll 17 apply an activator on the print layer uniformly. At this time, the hot air blasting device 18 blasts a hot air to an outlet of a nip of the applying roll 15 and the press roll 17, i.e., to a position where the film 11 leaves the applying roll 15. Therefore, the surface temperature of the applying roll 15 rises and the viscosity of the activator and the surface tension falls. Thus, bubbles generating at a position where the film 11 leaves the applying roll 15 are restrained and an unevenness of the application is prevented. Here, as for a heating temperature from the hot air blasting device 18, the temperature is made to be about 25-40 deg.C after the blasting of the hot air with respect to 18-25 deg.C of the surface temperature of the applying roll in the case that the hot air is not blasted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an activator coating device for applying an activator to a printed layer of a film having a printed layer on one side.

[Conventional technology]

Conventionally, as a method of performing transfer printing on objects with one curved surface, a thin film with one side printed in advance is prepared and the printed layer of the film is applied.

The printing layer is activated by applying an activator containing a solvent that can swell the ink used for printing, and the film is floated on the liquid surface with the printing layer facing up, and the film is moved from above toward the printing layer onto the transfer target. There is a known printing method in which the film is lowered to settle below the liquid surface, transferred to an object by liquid dipping, and then the film is removed from the surface of the object after the transfer (for example, Japanese Patent Publication No. 1983-1999). No. 50597, Special Publication No. 60-587
(See Publication No. 18).

In these conventional techniques, the apparatus for uniformly applying the activator to the printed layer of the film includes an activator tank 2 containing an activator 1, as shown in FIG.

A coating roll 3 that is arranged so as to be partially immersed in the activator tank 2 and rotates while holding the activator on its peripheral surface; a doctor blade 4 that regulates the amount of activator on the coating roll 3;
A type equipped with a press roll 6, etc. that presses the film 5 to be coated with the activator against the coating roll 3 is used, and in particular, a gravure coating type using a gravure cylinder as the coating roll 3 is often used. It had been.

[Problem to be solved by the invention]

However, such conventional transfer printing methods have a problem in that striped irregularities occur in the pattern transferred and printed on the transfer target.

As a result of investigating the cause of this problem, the present inventors found that the cause was caused by uneven coating of the activator on the printed layer of the film, and that the position of the film 5 away from the coating roll (gravure cylinder) 3 in the coating device It was found that bubbles 7 of the activator were generated, and striped coating unevenness was generated in the areas where the bubbles were generated.

The present invention has been made in view of these problems.

It is an object of the present invention to provide an activator coating device that can prevent the generation of bubbles at the separation point between a film and a coating roll, and can prevent uneven coating of an activator.

[Means to solve the problem]

The present invention is an activator coating device for applying an activator to the printed layer of a film provided with a printed layer on one surface, comprising: a coating roll that rotates while holding an activator on one circumferential surface; The gist of the present invention is to provide an activator coating device that includes a press roll that presses the coating roll against the coating roll, and a hot air blowing device that blows hot air onto the exit side of the nip between the coating roll and the press roll.

[Effect]

In the apparatus having the above configuration, by means of a hot air blowing device.

When hot air is blown onto the exit side of the nip between the coating roll and the press roll, the temperature of the activator between the coating roll and the press roll increases, the internal energy of the resin and solvent molecules in the activator increases, and the viscosity increases. and surface tension decreases.

This suppresses the generation of air bubbles and prevents unevenness in the fabric.

In addition, increasing the solvent content in the activator will reduce the viscosity.
It is thought that bubble generation can be prevented.

It cannot be used for transfer printing because it affects the transfer suitability, such as the dissolving power of the activator. On the other hand, in the present invention, only heating is performed, so there is no change in the composition (and no problem occurs in transfer printing).

〔Example〕

A preferred embodiment of the present invention will be described below.

FIG. 1 is a schematic side view of a transfer device equipped with an activator coating device according to an embodiment of the present invention. Reference numeral 11 denotes a film having a printing layer on one side, which is sent as a double-wound film roll IIA and fed out from the film roll 11A. This film 11 is usually made of a material that swells with the liquid in the transfer tank (described later). 12 is an activator application device, and activator 13
an activator tank 14 containing activator, a coating roll 15 that is arranged so as to be partially immersed in the activator tank 14 and rotates while holding the activator on two circumferential surfaces, and regulating the amount of activator on the coating roll 15. and a press roll 17 that presses the film 11 to be coated with the activator against the coating roll 15.

As the application roll 15, it is preferable to use a gravure cylinder having a pattern that holds the activator uniformly over the entire surface.

Reference numeral 18 denotes a hot air blowing device 18 that blows hot air onto the exit side of the nip portion between the lfi cloth roll 15 and the press roll 17.

20 is a transfer tank filled with a transfer liquid 21; 22 is a film 1;
A conveyor 23 sends the transfer material 1 into the transfer liquid, and a conveyor 23 immerses the object 24 to be transferred into the transfer liquid 21.

Next, the transfer printing operation by the apparatus having the above configuration will be explained.

The film 11 is pulled out from roll IIA with its printed layer facing down, and the activator is uniformly applied to the printed layer by the coating roll 15 and press roll 17 of the activator coating device 12. At this time, the hot air blowing device 18 blows hot air to the exit side of the nip portion between the coating roll 15 and the press roll 17, that is, to the position where the film 11 is separated from the coating roll 15. Therefore, the surface temperature of the application roll 15 (and the temperature of the activator between the application roll and the press roll) increases, and the viscosity and surface tension of the activator decrease. This suppresses the generation of air bubbles at the position where the film 11 leaves the coating roll 15, and prevents uneven coating from occurring.

Here, the heating temperature by the hot air blowing device 18 is not particularly limited.

Claims (1)

[Claims] An activator coating device for applying an activator to the printing layer of a film provided with a printing layer on one side, comprising: a coating roll that rotates while holding an activator on its peripheral surface; An activator coating device comprising: a press roll that presses the application roll; and a hot air blowing device that blows hot air to the exit side of the nip between the coating roll and the press roll.