JP2664582B2 - Rolls for resin film production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll for manufacturing a resin film, and more particularly to a roll for removing static electricity which may be generated when transferring or winding a resin film. The present invention relates to an antistatic roll formed by arranging shaped conductors.

[0002]

2. Description of the Related Art Generally, in the production of resin films such as polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC) and polyamide (Nylon). A transfer roll for transferring the resin film and a winding roll for winding the resin film are used. There are two types of such rolls, one consisting only of a conductor and the other having a surface coated with an insulating material. When transferring or winding a resin film, a large amount of static electricity is generated due to friction between the roll and the film, and when left unattended, a foreign substance is electrostatically attached to the resin film to deteriorate the quality. Bring results.

[0003] In the case of a roll consisting only of a conductor, static electricity can be discharged by simply grounding the roll itself. However, in the case of a roll coated with an insulating material, the conductor at the center is grounded. It is not possible to remove static electricity existing in the insulating layer or the film only by performing the operation.

Therefore, conventionally, there has been used a method of removing static electricity by separately providing a static eliminator near the roll or by adding a static elimination additive such as an antistatic agent to the resin film itself.

However, when the above-described static elimination method is used, it is impossible to remove static electricity in a place where the static eliminator is not prepared, and even if an additive for static elimination is used,
Not only is the charge elimination effect weak, but problems such as deterioration of physical properties or poor quality of the resin film due to the use of additives and the like occur.

In addition, a method of adding a neutralizing additive to a chip as an intermediate in the process of producing a film and mixing the resulting mixture before producing a film has been used. Although there was a significant static elimination effect, it was actually used only during the production of special films, which was not desirable as a fundamental solution direction.

The inventor of the present invention has conducted research to solve problems such as adhesion of foreign substances due to static electricity on a conventional roll for manufacturing a resin film, reduction in productivity of the resin film, and poor quality. The present invention has been completed.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an improved structure capable of effectively removing static electricity generated on a roll and a film when a resin film is transferred or wound. To provide a roll for producing a resin film.

An object of the present invention is to provide a roll used for transferring a resin film or winding the resin film on a circumferential surface, in a cylindrical conductive film having a longitudinal axis and a rotation axis. A core, which is coated around the core, and has a spiral groove formed at a predetermined pitch along a circumferential surface of the roll in an inclined relationship with respect to the longitudinal axis. A resin film manufacturing method comprising: an insulating layer; an elongated conductor disposed in the spiral groove; and a grounding means electrically connected to one end of the elongated conductor. Can be achieved by a roll for

[0010]

In the roll for producing a resin film according to the present invention, an elongated conductor provided in a spiral groove of the insulating layer and a conductive needle attached to the conductor comprise a roll and a resin film. Static electricity generated by friction between the battery and the outside is discharged to the outside through the grounding means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 4 show one embodiment of a roll for producing a resin film according to the present invention. As shown in the figure, a roll 10 for manufacturing a resin film includes a cylindrical conductive core 12 having a longitudinal axis, and a rotating shaft 14 is coaxially provided at both ends of the conductive core 12. Mounted. In addition, an insulating layer 16 made of, for example, rubber or silicon is coated around the conductive core 12 to enhance the frictional contact force between the resin film and the roll when the resin film is transferred or wound. Will be.

A spiral groove 18 is formed in the insulating layer 16 along a circumferential surface at a predetermined angle, for example, 45 ° with respect to the longitudinal axis. The pitch of the spiral groove 18 varies depending on the length of the roll, but it is desirable to form the groove 18 at a pitch as short as possible in order to enhance the effect of removing static electricity. Although the figures show the spiral groove 18 as having a U-shape, other shapes, for example, a V-shape, may be used.

An elongated conductor 20, for example, a metal wire or a metal strip is attached to the bottom of the spiral groove 18 by an adhesive or the like. Slender conductor 2
One end of 0 is electrically connected to a metal bearing 22 rotatably supporting the rotating shaft 14 of the roll, for example, a conductive oilless bearing. Of course, conductor 2
The contact between 0 and the bearing 22 is a movable contact, not a fixed contact. Bearing 22 is grounded through wire 24 or other conductive component. The bearing 22 and the conducting wire 24 constitute one grounding means for discharging static electricity.

A plurality of conductive needles 26 can be attached to the elongated conductor 20 at substantially equal intervals along the longitudinal direction. The conductive needle 26 extends outward from the conductor 20 along the radius of the roll, and enhances the efficiency of removing static electricity existing in the thickness direction of the insulating layer 16 and static electricity existing in the resin film. At this time, the conductive needle 26 must not extend to the outside of the circumferential surface of the roll 10 because it may cause damage to the resin film. In order to increase the productivity of the roll 10 according to the present invention, it is desirable to attach the conductive needle 26 to the elongated conductor 20 in advance and then provide the conductor 20 in the spiral groove 18.

When the resin film is transported or wound by using the roll 10 having the above structure, the static electricity charged on the resin film or the roll is transferred to the conductive needle 26.
And the electric conductor 20 having the elongated shape are discharged through the bearing 22 and the conducting wire 24. FIG. 5 schematically shows another embodiment of the antistatic roll according to the present invention.

The roll 30 of this embodiment is similar in function to the roll 10 of the embodiment shown in FIGS. 1 to 4 except that the grooves formed in the insulating layer 16 and the grooves The shape of the conductor disposed therein is different from that of the embodiment described above. In other words, in the embodiment shown in FIG. 5, the first spiral groove 18a is formed in the insulating layer 16 at an angle to the axis of the roll, and the second groove 18b crossing the first groove 18a. Are further formed. Therefore, a substantially diamond-shaped isolation region 32 is formed between the first groove 18a and the second groove 18b. At the bottom of the first groove 18a and the second groove 18b, an elongated conductor 20 having the same structure as described above is provided.
a and 20b are provided by a grid pattern and collect static electricity charged on the resin film and the insulating layer of the roll. The other structure of the roll and the principle of discharging static electricity are the same as those described above, so that further detailed description will be omitted.

[0018]

According to the roll of the present invention having the above-described structure, the static electricity generated when transferring and winding the resin film can be removed very effectively. For this reason, it is possible to prevent foreign substances from electrostatically adhering to the surfaces of the resin film and the roll, and thus it is possible to improve the productivity and quality of the resin film.

[Brief description of the drawings]

FIG. 1 is a front view of a roll for manufacturing a resin film according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the roll shown in FIG.

FIG. 3 is a sectional view taken along line BB of the roll shown in FIG. 2, showing an arrangement of elongated conductors and conductor needles arranged in a spiral groove.

FIG. 4 is an enlarged sectional view of a portion indicated by a circle C in FIG. 2;

FIG. 5 is a front view of a roll for manufacturing a resin film according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Roll of 1st Example 12 ... Conductive core 14 ... Rotation axis 16 ... Insulating layer 18 ... Helical groove 20 ... Elongated conductor 22 ... Conductive bearing 24 ... Grounding conductor 30 ... 2nd Example roll

Claims (5)

(57) [Claims] 1. A roll used for transferring a resin film or winding the resin film on a circumferential surface, comprising: a cylindrical conductive core having a longitudinal axis and a rotation axis; An insulating layer having a spiral groove formed at a predetermined pitch along a circumferential surface in an inclined relationship with respect to the longitudinal axis, and the spiral groove A roll for producing a resin film, comprising: an elongated conductor arranged in the inside; and a grounding means electrically connected to one end of the elongated conductor. 2. The apparatus according to claim 2, further comprising a plurality of conductive needles arranged at substantially equal intervals along a longitudinal direction of the elongated conductor, wherein the conductive needles are disposed at a radius of a roll in the groove. The resin film manufacturing roll according to claim 1, wherein the roll extends in an outer direction along the roll. 3. The resin film according to claim 1, wherein said grounding means comprises a bearing for rotatably supporting a rotating shaft of said roll and a conductive wire for electrically connecting said bearing to the ground. Rolls for manufacturing. 4. A roll used for transferring a resin film or winding the resin film on a circumferential surface, comprising: a cylindrical conductive core having a longitudinal axis and a rotation axis; A spiral first groove formed at a predetermined pitch along the circumferential direction and intersecting with the first groove in an inclined relationship with respect to the longitudinal axis. An insulating layer having a spiral second groove formed so as to define a substantially diamond-shaped isolation region; an elongated conductor disposed in the spiral first and second grooves; And a grounding means electrically connected to one end of the elongated conductor. 5. The semiconductor device according to claim 1, further comprising a plurality of conductive needles arranged at substantially equal intervals along a longitudinal direction of the elongated conductor, wherein the conductive needles are provided in the first groove and the second groove. The roll for producing a resin film according to claim 4, wherein the roll extends in an outer direction along a radius of the roll.