JPS60929A - Thermoplastic synthetic resin film with crepe pattern and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain the titled film inexpensively by simple operation, by a method wherein a pressing roll on which a large number of annular recessed parts is formed at intervals in its axial direction is made to contact with a heated rotatable drum and the synthetic resin film to which tension is applied is inserted closely between them. CONSTITUTION:A large number of annular recessed parts 8 is formed on a heated rotatable drum 6 at intervals in its axial direction and a pressing roll 7 on which a contacting part 9 and a noncontacting part 8 are provided is made to touch with the drum 6. Then a thermoplastic synthetic resin film (example, polyvinyl chloride resin film) 2 to which tension is applied is inserted closely between the drum 6 and the pressing roll 7, the film 2 is heated by this contacting part 9, and after formation of a large number of creases 14 on this orientation heating part 13 in the direction crossing to an orientation direction of the film 2, an orientation heating film 2a is made to cool by leaving it on a belt conveyor 12 as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crimp-patterned thermoplastic synthetic resin film and a manufacturing method.

Conventionally, to form a wrinkled pattern on a thermoplastic synthetic resin film, a stretched film and an unstretched film are pasted together.
Since the shrinkage pattern is formed by applying the shrinkage force of the stretched film, it requires two films, a stretched film and a non-stretched film, and also requires a bonding means, making the operation cumbersome. It had the disadvantage of being expensive.

The present invention was invented to eliminate this drawback. Therefore, the purpose of the present invention is to provide a thermoplastic synthetic resin film that can be provided at low cost and has a wrinkled pattern formed by a simple operation. It is an object of the present invention to provide a method that can form a wrinkled pattern by operation, and to achieve this object, the present invention forms a number of stretching heating parts at intervals in a thermoplastic synthetic resin film, and in the stretching heating parts. , a pressure roll formed in the axial direction is brought into contact with the point where a large number of wrinkles are formed in a direction crossing the stretching direction, and a heated drum that is freely rotatable, and tension is applied between the drum and the pressure roll. A thermoplastic synthetic resin film is closely inserted in a state in which the film is stretched, and the film is heated at the contact portion using a heating drum to form a large number of wrinkles in the direction perpendicular to the stretching direction of the film in the stretched and heated portion. This is a summary of the points made.

Next, the present invention will be explained in detail based on the drawings. (1) is a wrapped product in which a thermoplastic synthetic resin film (2) such as a vinyl chloride resin film is wrapped and horizontally hung so that it can be unwound.
) is a drive roll horizontally suspended to rotate freely in the vicinity of the wrapping material (1), and the drive roll (3) is a first pressure roll (4).
It is equipped with Further, (5) is a guide roll for guiding the film (2), and a large number of guide rolls (5) are provided at necessary locations. In addition, (6) has a surface temperature of, for example, 12
A freely rotating drum heated to a temperature of 5 to 130°C,
The surface of the heating drum (6) may or may not be a mirror surface, and an appropriate intaglio pattern may be formed on the surface. Further, the circumferential speed of the heating drum (6) is set higher than the circumferential speed of the drive roll (6), and the film ( 2), drive roll (3) and heating tram (6)
It is like stretching by applying tension between the two.

Further, (7) is a second press roll that is horizontally suspended in a pressed state and freely rotates on the heating drum (6), and the second press roll (7)
is constructed as detailed in FIG.

That is, the second press roll (7) forms a required number of annular recesses (8) (depth approximately 5U or more) at intervals in the axial direction, and the annular recesses (8) are It forms a non-contact part having a gap with respect to the heating drum (6), and a part other than the annular recess (8) forms a contact part (9) that contacts the heating drum (6). The second pressing roll (7) presses the heating drum (6) with adjusted pressure via a contact roll (11) pressed by a pair of air cylinders (10). It will be accomplished.

It is preferable to use elastic rubber as the constituent material of the pressure roll (7), but it may be made of other materials.

Further, (12) is a digit held conveyor installed near the press roll (7), and conveys the stretched and heat-treated film (2 m) by the belt conveyor (12), and during the conveyance, the belt conveyor (12) The stretched heated film (2a) is then left to cool naturally or is forcedly cooled by an appropriate means.

During this transportation, the following phenomenon occurs.

That is, the film stretched between the drive roll (3) and the heating drum (6) is heated to 125 to 130°C by the heating drum (6) at the contact portion (9) in the stretched state. The internal stress disappears in the part that is in contact with the contact part (9), and the part that is not in contact with the heating drum (6) and is not heated is in a stretched state, and during the stretching process,
It will contract (return to its original state) by the amount of tension applied. In other words, the size corresponding to the original size in the non-contact area appears as a large number of wrinkles (14) in the contact area, in other words, in the stretched and heated area (13) where the stretching and heating process has been performed. 14) appears in a direction perpendicular to the stretching direction of the film (2) (see FIG. 3), and the product of the present invention is completed.

The film of the present invention, which has been completed by causing the above-mentioned phenomenon during transportation as described above, is then passed through a large number of guide rolls (5
The film is wound onto the winding shaft (15) via the winding shaft (15).

As mentioned above, when forming an appropriate intaglio pattern on the outer peripheral surface of the force-03 stack drum (6), a pattern corresponding to the above-mentioned intaglio pattern and having a sagging shape is applied to the stretching heating section (13). can be formed and the design of the film can be improved.

Since the method of the present invention is constructed as described above, it is possible to overcome the disadvantages of the conventional method of using two films, as is clear from the above explanation, and furthermore, the method uses a second pressure roll having a special structure. Because the product was stretched and heat treated, it was possible to form an unspecified number of wrinkles.Also, since the product of the present invention was manufactured using simple operations as described above, it had the remarkable effect of being able to be provided in large quantities at low cost. .

Next, an example of implementing the method of the present invention will be described.

The peripheral speed of the drive roll (3) is 1.6 m/min. Further, the surface temperature of the heating drum (6) is set to 128°C, and its circumferential speed is set to 4.6-7 minutes.

Using a vinyl chloride resin film with a thickness of 150P, an unspecified number of wrinkles (14) in a direction perpendicular to the stretching direction of the film were formed in the stretching heating section (16) shown in FIG. 6 by the same operation as described above. A long product was obtained.

[Brief explanation of the drawing]

Fig. 1 is a simplified explanatory diagram of one embodiment of the device used in carrying out the method of the present invention, Fig. 2 is a partially cutaway slope view of the main part of the same device, and Fig. 6 is a plan view of the product of the present invention. . (2)...Thermoplastic synthetic resin film (6)...Heating drum (7)...Press roll (second press roll) (8)...
・Annular recess (9)...Contact part (13)...Stretching heating part (14)...Wrinkle agent Patent attorney Tsu 1) Nao Hisa・Ni 1:, il (
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Claims (1)

[Claims] (1) A shrinking method characterized by forming a large number of stretched and heated parts at intervals in a thermoplastic synthetic resin film, and formed a large number of wrinkles in the direction crossing the stretching direction in the stretched and heated parts. Patterned thermoplastic synthetic resin film. (2) A suppressing roll having a contact portion and a non-contacting portion formed by forming a large number of annular recesses at intervals in the axial direction is brought into contact with a heated drum that is freely rotatable, and between the drum and the suppressing roll. , a thermoplastic synthetic resin film is closely inserted under tension, and the RiJ contact portion iJ film is heated with the heating drum 7m4, and the stretched heated portion is crossed with the stretching direction of the film. A method for producing a thermoplastic synthetic resin film with a crimp pattern characterized by the formation of many directional wrinkles.