JPH09142739A - Spool core for metal plastic laminating material and method of application thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a height difference occurring in the leading end edge part of a metal plastic laminating material by covering the outer peripheral surface of a bobbin on which the laminating material is wound, with a cushion material having a specified compressive stress. SOLUTION: A bobbin 1 is composed of a hard paper cylindrical core 10, and a cushion material 11 with which the outer peripheral surface of the core 10 is covered. The thickness of the cushion material 11 is most preferably be about 2 to 3mm. The metal plastic laminating material 2 is thin and band-like, and is stuck at its leading end edge part onto the outer surface of the bobbin 1 by a double-surface adhesive tape. The bobbin 1 is rotated in the winding direction so as to wind up the laminating material onto the bobbin under a winding tension of about 2 to 3kgf per winding width of about 30cm. With this arrangement, the cushion material 11 is retained by the leading end edge part of the metal plastic laminating material 2 so as to be recessed, thereby it is possible substantially eliminate a height difference between the leading end edge of the metal plastic laminating material 2 and the outer peripheral surface of the cylindrical bobbin 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core of a metal / plastic laminate which requires flexibility, such as various laminates, circuit boards and flexible printed wiring boards used as materials for electronic devices, and uses thereof. Regarding the winding method.

[0002]

2. Description of the Related Art Winding of a metal-plastic laminate is
This is performed by adhering the winding start edge of the laminate to be wound onto a winding core made of hard paper or plastic and rotating the winding core in the winding direction. At this time, if the winding tension is weak, the laminate is distorted and wrinkles occur, and the winding end face is disturbed. In order to wind so that the winding end faces are aligned, it is necessary to wind with a tension higher than a predetermined value.

However, when the winding end face is wound with a strong tension so that the winding end faces are aligned, a step appears at the end edge portion and the laminated body wound around it, resulting in poor appearance and using the laminated body at that portion. When doing, there was a problem that inconvenience occurred. In order to solve this problem, it has been proposed to cover the outer peripheral surface of the winding core with a cushion material having a compressive stress of 0.1 to 10 kgf / cm ² . However, although such a cushion material is suitable for winding a thin plastic film, it is not suitable for winding a composite laminate of a metal foil and a plastic film, and the effect of the cushion is hardly seen. I can't.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to be suitable for winding a metal-plastic laminate and to be formed at a winding start edge portion. It is an object of the present invention to provide a metal-plastic laminate core having a reduced number of steps and a winding method using the same.

[0005]

SUMMARY OF THE INVENTION The above object is to provide a core for use in winding a metal / plastic laminate, in which a compressive stress of 0.01 to 0.1 kgf / c is applied to the outer peripheral surface of the core.
This is achieved by the above-mentioned metal-plastic laminate core which is coated with m ² of cushioning material.

Further, the above-mentioned object is a method of winding a metal-plastic laminate on a winding core, wherein the outer surface of the winding core is covered with a cushioning material having a compressive stress of 0.01 to 0.1 kgf / cm ² or less. Using a double-sided adhesive tape or the like, attach the winding start end edge of the metal-plastic laminate to the outer surface of the cushion material, rotate the winding core in the winding direction, and rotate the metal-plastic laminate to the winding end surface. It is achieved by a method for winding a metal-plastic laminate, characterized in that the metal-plastic laminate is wound with a tension suitable for aligning.

The metal used here is, for example,
Copper, iron, nickel, molybdenum, silver, palladium, tungsten, zinc, lead, aluminum, chromium and the like and alloys thereof can be mentioned. Examples of the plastic include holimide, polyamide, polyphenylene oxide, polysulfone, acrylic resin, epoxy. Examples thereof include resins, polycarbonates, saturated polyesters, polyvinyl chloride, polyvinyl alcohol, cellulose acetate and the like, and plastics composed of two or more of these.

The cushion material has a thickness of 0.5 to
10 mm polystyrene foam, polyethylene foam, polypropylene foam, polyvinyl chloride foam, viscose sponge, rubber foam, EVA foam, ABS foam, nylon foam, acrylic resin foam, polyurethane foam, felt foam, urea resin foam, silicone resin foam A foamed resin such as an epoxy resin foam is used, and a paper tube, a metal tube other than aluminum, a polyvinyl tube, a saturated polyester tube, a glass tube, a composite tube thereof, or the like is used as the winding core. The desired thickness of the heartwood is generally 8-12 m
m.

[0009]

With the above-mentioned structure, even if the metal-plastic laminate is wound with a tension of a predetermined value or more so that the winding end faces are aligned, the steps at the winding start edge are successively overlapped on the edge. It is hardly transferred to the laminated body that is being processed.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a winding state of a metal plastic laminate with a metal plastic laminate core according to the present invention,
FIG. 2 is a partially enlarged explanatory view in the vicinity of the winding start end edge portion of the metal-plastic laminate on the AA line end surface shown in FIG. In the figure, 1 is a winding core, 2 is a metal-plastic laminate, and 3 is a double-sided adhesive tape.

First, FIG. 1 will be described. The core 1 is
A cylindrical core 10 made of hard paper and a compressive stress covering the outer peripheral surface of the core 10 of 0.01 to 0.1 kgf / cm.
² cushion material 11. This cushion material 1
If 1 is too thin, it does not function as a cushion, and on the contrary, if it is too thick, wrinkles may form and correct winding may not be performed, so the thickness is 1 to 5 mm, preferably 2 to 5.
3 mm is recommended.

The winding core 1 is supported by a winding device (not shown) so as to be rotatable and controllable about its axis of symmetry. The metal-plastic laminate 2 is in the form of a thin strip, and its winding start edge is attached to the outer surface of the winding core 1 with a double-sided adhesive tape 3. The metal-plastic laminate 2 preferably has a thickness of 50 to 200 μm. The double-sided tape preferably has a thickness of 25 to 50 μm.

Then, the winding core 1 is rotated in the winding direction, and the metal-plastic laminate 2 is wound with a tension such that the winding end faces are aligned. This winding tension is usually
The winding width is 2-3 kgf per 30 cm. When the metal plastic laminate 2 is wound up by the winding core 1 in this manner, the cushion material 11 is pressed against the winding start end edge portion of the metal plastic laminate 2 and is recessed, as shown in FIG. Therefore, there is almost no step between the outer peripheral cylindrical surface of the winding core 1 and the outer peripheral surface of the winding start end edge portion of the metal-plastic laminate 2, and the step at the winding start end edge portion overlaps the winding start end edge portion. It becomes difficult to be transferred to the metal-plastic laminate 2.

Using the metal-plastic laminate core according to the present invention and a conventional core, the metal-plastic laminate was actually wound up and the wound state was tested, and the results are shown. [Test 1] The following cores were used. Core material Material: Hard paper Inner diameter: 3 inches Heat: 8 mm Cushion material: PE foam Thickness: 2 mm Compressive stress: 0.013 kgf / cm ²

This core has a width of 250 mm and a thickness of 60 μm.
One edge of the metal-plastic laminate was adhered with a double-sided adhesive tape, and it was wound 100 times with a tension such that the wound end surfaces were aligned, and left for one day. Then, the laminate was unwound, and the number of remaining winding layers after the step at the winding start edge was transferred was visually counted, and it was examined up to what number of steps the step mark was recognized. With this core, the trace of the step was recognized only up to the second roll, and it was found that the laminate can be wound in an extremely good state.

[Test 2] A metal-plastic laminate having a width of 250 mm and a thickness of 255 μm was wound by using the same core as that used in Test 1, except that the cushion material was as follows. The same test as Test 1 was performed. Material: PE foam Thickness: 3 mm Compressive stress: 0.063 kgf / cm ^{2 With} this core, only traces of steps are recognized up to the fifth roll, and the laminate is wound in a very good state. It turns out that I can take it.

[Test 3] The same test as in Test 1 was conducted using the same core as that used in Test 1 except that the cushion material was as follows. Material: PP foam Thickness: 3 mm Compressive stress: 0.115 kgf / cm ^{2 With} this core, step marks are recognized up to the 7th roll, and the step marks are transferred more than in the case of test 1. It turns out that there are many.

[Reference Test 1] The same test as in Test 1 was carried out using the core material used in Test 1 as the winding core and without using the cushion material. With this core, a step mark was recognized up to the 40th roll, and it was found that the core was not suitable as the core of the metal-plastic laminate.

[Reference Test 2] As a core for a conventional plastic film, that is, as a cushion material, a thickness of 5 mm,
A winding test was conducted in the same manner as in Test 2 except that a core made of PS foam having a compressive stress of 3.1 kgf / cm ² was used. With this core, the cushion material is too hard, the winding start edge of the metal-plastic laminate does not sink into the cushion material, and a step mark is recognized up to the 30th roll, which is unsuitable as the core of the metal-plastic laminate. I knew that.

The present invention is not limited to the above embodiments, but any type of foamed resin foam can be used as the cushioning material, and the cushioning material for the core of the metal-plastic laminate is used. The method of adhering to the above is arbitrary, and further, the present invention covers all modified embodiments which can be easily conceived by those skilled in the art from the above description.

[0021]

The metal-plastic laminate core and the winding method using the same according to the present invention are constructed as described above. Therefore, according to the present invention, the metal-plastic laminate is wound in a very good state. Can be taken and held.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a winding state of a metal plastic laminate with a metal plastic laminate core according to the present invention.

FIG. 2 is a partially enlarged explanatory view of the vicinity of the winding start end edge portion of the metal plastic laminate on the AA line end surface shown in FIG.

[Explanation of symbols]

 1 ...- core 10 ... core material 11 ... cushion material 2 ... metal-plastic laminate 3 ... double-sided adhesive tape

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masanori Kobayashi 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Koichi Aizawa 1190 Kasama-cho, Sakae-ku, Yokohama, Kanagawa Mitsui Toatsu Chem. Incorporated (72) Inventor Shigeyuki Shishido 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd.

Claims (2)

[Claims] 1. A winding core used for winding a metal-plastic laminate, the outer peripheral surface of which has a compressive stress of 0.01 to 0.1 kgf / cm ^2.
The core of the above-mentioned metal-plastic laminate, which is covered with the cushion material of. 2. A method of winding a metal-plastic laminate on a core, wherein the core has a compressive stress of 0.01 to 0.1 kgf on its outer peripheral surface.
/ Cm ² cushioning material, using a double-sided adhesive tape, attach the winding start edge of the metal-plastic laminate to the outer surface of the cushioning material, and rotate the winding core in the winding direction. A method for winding a metal-plastic laminate, comprising winding the metal-plastic laminate with a tension suitable for aligning the winding end faces.