JP2525677B2 - Thin film peeling method and apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for peeling a flexible support and a thin film formed on the flexible support, and in particular,
The present invention relates to a method and apparatus for peeling a thin film such as a magnetic layer or a photosensitive layer and a strip-shaped plastic base carrying the thin film.

[Conventional technology]

2. Description of the Related Art Conventionally, an information recording medium, such as a magnetic tape or a light-sensitive material, in which a thin film of a magnetic layer or a light-sensitive layer is formed on a plastic base that is a flexible support has been widely used in various fields. These information recording media are required to have high performance in both quantity and quality of recorded information as the performance of the equipment used is improved, and research and development are continuing.

In this research and development, for example, whether the thin film formed on the flexible support has a desired composition,
In addition, sampling is performed in order to inspect various performances such as mechanical properties of the thin film itself and adhesive strength with the flexible support. The data obtained by analyzing a sample of the product in this way will be valuable for the research and development of the next product.

For example, in magnetic tapes for VTRs in recent years, the magnetic layer tends to be multi-layered, the video characteristics depend on the performance of the uppermost layer, and the audio characteristics depend on the overall performance of the magnetic layer. It is becoming very important to control the uniformity of the film thickness of the upper layer, the uniformity of the entire film thickness, and the composition of each layer. Further, analysis of characteristic changes such as strength of the flexible support after various processing steps is also an important factor for improving product quality. Further, regarding these respective characteristics, accurate data can be obtained and accurate consideration can be made by completely separating the flexible support and the thin film.

Therefore, conventionally, the thin film is scraped off by rubbing a blade or the like on the thin film, or by pulling the flexible support having a constant length with a relatively large force, A method has been used in which plastic deformation is generated in a support and at the same time, the thin film is finely broken and the broken thin film is scraped.

[Problems to be Solved by the Invention]

However, in the conventional method as described above, not only a large peeling piece cannot be obtained for peeling the thin film from the flexible support, but also a thinly separated thin film, a so-called damaged thin film is scraped off. However, since the flexible support is scratched or plastically deformed, it is difficult to obtain a desired accurate sample. I was holding.

An object of the present invention is to solve the above problems, and the flexible support and the thin film can be peeled in a very good state with almost no damage, and the thin film can be peeled very quickly. It is to provide a peeling method and device.

[Means and Actions for Solving the Problems]

The above object of the present invention is to bring a blade along the substantially width direction of the support into contact with the back surface of the flexible support on which a thin film is formed, and to fix the flexible support to the blade at a constant angle. This can be achieved by a peeling method in which the flexible support and the thin film are continuously peeled off by running the flexible support while tensioning the flexible support as described above. Further, in the peeling method, at least a pulling means for pulling a flexible support on which a thin film is formed to run in a fixed direction, and a thin film of the flexible support is formed at a position preceding the pulling means. It is extremely easily performed by a peeling device having a blade that abuts from the non-contact side to bend the support, and a tension applying unit that applies a back tension to the flexible support at a position preceding the blade. be able to.

That is, the flexible support is instantaneously stretched by running so that the flexible support rubs the back surface of the blade with a wrap angle of a certain angle or more, and the amount of this extension is Due to the difference from the amount of indirect elongation generated in the thin film by the blade, a momentary shift occurs at the interface between the flexible support and the thin film. Due to this displacement force, peeling of the thin film occurs continuously and extremely smoothly as the flexible support travels, and the flexible support is not plastically deformed or the thin film is not shredded at all, which is extremely high. A quick peeling operation can be performed.

[Embodiment]

An embodiment of the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to this embodiment.

FIG. 1 is a perspective view of a peeling device adapted for peeling a plastic base and a magnetic layer in a magnetic tape by the peeling method of the present invention, and FIG. 2 is a side view of a main part of the device shown in FIG. Is.

The apparatus 1 shown in FIG. 1 has various members attached to a pedestal 2 having an inverted T shape when viewed from the side, and a plastic base T on which a thin film T _M , which is a magnetic layer, is already peeled off at a position near the upper side. _A take-up reel 8 for pulling _B (hereinafter, simply referred to as "base") is provided, and a winding guide roller 7 is provided upstream thereof (hereinafter, a feeding side of the magnetic tape is referred to as "upstream"). The auxiliary blade 6 and the main blade 5 are continuously arranged on the upstream side below the winding guide roller 7 in an appropriate manner. Further, on the upstream side of the main blade 5, a delivery guide roller 4 capable of setting an appropriate incident angle to the main blade 5 is provided on the magnetic tape T before the separation of the magnetic layer. A delivery reel 3 for continuously feeding out the magnetic tape T is rotatably mounted on the upstream side of the guide roller 4.

The delivery reel 3 is fixed to the rotation support shaft 20 and rotatably mounted. The rotation support shaft 20 has a structure that requires a certain force for its rotation, for example, a well-known structure in which a friction ring, a coil spring, an adjusting screw, etc. are properly incorporated on the opposite side (back side of the gantry) on which the delivery reel 3 is mounted. By adopting the above structure, it is possible to apply a desired back tension to the magnetic tape T.

Further, the back tension can be changed to some extent depending on the positional relationship between the feeding guide roller 4 and the main blade 5.

The take-up reel 8 is fixed to the rotation support shaft 21. A gear 22 is fixed to the rotating shaft 21 on the opposite side to which the take-up reel 8 is mounted.
A gear 24 having a smaller diameter than the gear 22 meshes with the gear 22, and the gear 24 is connected to the rotary handle 9 via a shaft 23.

Therefore, by turning the rotation handle 9 in the appropriate direction, it is possible to involve the base T _B to the take-up reel 8.

The main blade 5 and the auxiliary blade 6 have a linear shape at least in a portion in contact with the magnetic tape T,
For example, as shown in the figure, it is configured in a rectangular shape, and the abutting tips 5a and 6a are firmly fixed to the holding plates 10 and 12 by screws 11 so as to project from the plate ends. The main blade 5 is a member directly involved in the peeling action. However, the auxiliary blade 6 is not directly involved in the peeling action between the base T _B and the thin film T _M,
If for example, as the thin film peeled is escort with the base T _B, or to release the said base T _B and the thin film T _M, or if a configuration in which the position of the blade 6 to move the base The pulling angle θ (see FIG. 2) can be adjusted, and further, it is possible to have a function of preventing a change in the base behavior due to a rotational shake of the winding guide roller 7, for example. as shown by the imaginary line, it may be to bridge directly to the base T _B the winding guide rollers 7 from the main blade 5.

The main blade 5 has the contact tip formed at the tip angle α on the back surface (diamagnetic running side) of the base of the magnetic tape T.
5a touches. The thickness t of the main blade 5 is not particularly limited, but is determined by various factors such as the material / strength, the protruding length (L) from the holding plate 10 and the fixing form. When using carbon steel such as used for razor blades, overhang length (L) 2m
m, the blade width is 40 mm, the interval between the set screws 11 is about 20 mm, and the thickness t of the blade 5 may be 0.1 mm or more. The tip angle α is preferably in the range of 30 degrees to 90 degrees,
The contact sharpened about the tip 5a is preferably the base T _B is sharp as possible without damaging or cutting. That is, the contact force tends to be concentrated in a narrow range of the contacting tip 5a as the area of the contact tip 5a is small, the temporary deformation tends to occur in a short time (elastic deformation) of the base T _B, based damage It is considered that effective peeling is likely to occur without it.

Further, the wrap angle of the base T _B can be represented by the base angle of incidence β and base pulling angle theta, wherein the base angle of incidence β in the range of 60 degrees from 0 degrees, from the base pulling angle theta is 0 degrees 90 It can be in the range of degrees.

Also, the tension during the peeling operation is not always constant from the magnetic tape feeding to the winding,
It can be roughly divided into two parts, the sending side region (A) and the winding side region (B), with the contact tip 5a as a boundary. That is, the rough tension setting is determined by the resistance force of the delivery reel 3 when it is rotated.
The rubbing resistance between 5a and the base back surface, since the base T _B on the downstream side is pulled than the abutment tip 5a, towards the entrainment side region (B) is a significant tension than the feed-side area (A) . This difference in tension depends on the magnitude of the rubbing resistance, and can be adjusted by adjusting the magnitudes of the base pulling angle θ and the base incident angle β, for example. Due to this difference in tension, temporary (instantaneous) base extension occurs in a very small extension region 30 on the downstream side from the portion in contact with the contact tip 5a, and peeling is performed.

In this way, the base with a lap angle of a certain angle or more
By T _B travels to rub the rear surface to the contact tip 5a, the base T _B is temporarily cause elongation at the stretching region 30, the thin film T _M this elongation amount by the blade 5 the resulting indirect elongation amount (shrinkage change amount after elongation cases differences) difference to the instantaneous deviation occurs in the base T _B and the interface portion of the thin film T _M. Due to this displacement force, peeling of the thin film T _M occurs continuously and extremely smoothly as the base T _B runs, and the base T _B is plastically deformed or the thin film is thin.
An extremely quick peeling operation can be performed without the T _M becoming finely divided. Therefore, while the base T _B is obtained in a state of being wound around the take-up reel 8, the thin film
For example, a large amount of T _M can be obtained in a very good state in which it is continuous in a strip shape in the storage case 40.

Although the peeling device 1 in the above embodiment is a manual type device, a motor or the like may be used as a drive source, and other various structures such as a tape running system and a pedestal are not limited to those shown in FIG. .

Although the embodiment has been described with respect to the magnetic tape, the present invention is not limited to the magnetic tape and can be applied not only to the peeling of the base and the photosensitive layer in the photosensitive material but also to the peeling principle of the present invention. It can be widely applied to the peeling of the permeable support and the thin film on the support.

〔The invention's effect〕

As described above, the present invention brings the blade along the substantially width direction of the support into contact with the back surface of the flexible support on which the thin film is formed, and the flexible support to the blade. By running while tension is applied so as to wrap at a certain angle or more, it is possible to generate a momentary deviation at the interface between the flexible support and the thin film without the blade contacting the thin film. The flexible support and the thin film can be continuously peeled off at an extremely high speed corresponding to the traveling speed of the support. Moreover, the flexible support can be peeled off in an extremely good state without being plastically deformed or the thin film being shredded. Therefore, the peeled thin film and the flexible support can be taken out in almost the same state as when both parts were fixed, so that the data obtained from this sample was difficult to obtain in the past. It is possible to obtain accurate data that is almost the same as that of the above product, and it is possible to exert a great effect on the product development.

(Examples) Hereinafter, the present invention can be further clarified by examples.

The magnetic tape was peeled off using the peeling device 1 shown in FIG.

It should be noted that the magnetic tape has a width of 8 mm and a thickness of 4,5 to 16 μ of the polyethylene terephthalate base T _B , and the thin film T _{M has} a thickness of 2,0 to 5.0 μ. A large number of magnetic tapes T were peeled off at an angle β of about 0 to 60 degrees and a base pulling angle θ of about 0 to 90 degrees by applying a winding tension of about 100 g in total width.

As a result, the tape running speed at the time of peeling, which is the peeling speed in most cases, can be set to about 200 m / min, and the peeling work can be performed at a high speed that has never been considered in the past,
Moreover, the magnetic layer was also strip-shaped, and accurate peeling could be performed without damage, and a large amount of samples could be obtained in which extremely accurate data could be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a peeling device adapted for peeling a plastic base of a magnetic tape and a magnetic layer by a peeling method of the present invention, and FIG. 2 is a side view of a main part of the device shown in FIG. Is. Symbols in the figure: 1 ... Peeling device, 2 ... Stand, 3 ... Delivery reel, 4 ... Delivery guide roller, 5 ... Main blade, 5a ... Contact tip, 6 ... Auxiliary blade, 7 ... … Rolling guide roller, 8 …… Winding reel, 9 …… Handle, 10,12 …… Holding plate, 11 …… Set screw, 20,21 …… Rotating spindle, 22,23 …… Gear, 23… ... shaft, 30 ...... elongation region, T ...... magnetic tape, T _B ...... base, T _M ...... thin (magnetic layer) 40 ...... storage case.

Claims (2)

(57) [Claims] 1. A blade along the width direction of the support is brought into contact with the back surface of the flexible support on which a thin film is formed, and the flexible support is wrapped around the blade by a certain angle or more. A peeling method characterized in that the flexible support and the thin film are continuously peeled off by running the flexible support while applying tension thereto. 2. A flexible means which has at least a thin film formed thereon, and a pulling means for running the flexible support body in a fixed direction, and the flexible means which is brought into contact with the flexible means at a position preceding the pulling means from a side where the thin film is not formed. A blade for bending the support and a tension applying means for applying a back tension to the flexible support at a position preceding the blade are provided, and the blade continuously connects the flexible support and the thin film. A peeling device, characterized in that it is configured to peel off.