JPH061406Y2 - Film with support leads - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is generally applied to the processing of the inner lid of a cosmetic container, a printing film placed on the lid of a station valve, or an insulating film used as an electronic circuit component. And extremely thin film materials that are difficult to handle.

(Prior Art) Conventionally, when processing a thin film used for the above-mentioned application, since the film material is extremely thin, for example, a plurality of these are stacked, punched, and then taken out one by one and put on a printing machine. ing.

[Problems to be solved by the invention]

However, when the preliminarily die-cut and stacked films are taken out one by one and used, it is difficult to separate the stacked films because the upper and lower films are easily brought into close contact with each other due to static electricity or the like.

Also, when the film taken out in this way is applied to a printing machine, it is necessary to set it flat at an accurate position, but the work is not easy because the film is thin and soft, and the yield during printing is high. Is extremely bad, and this tendency is remarkable especially when multicolor printing is performed.

Even for other applications, it is extremely complicated to position such thin films one by one at a predetermined place, and it is not easy to introduce an automated system for continuous work. In particular, a film used as an insulating material for electronic calculators may be required to have an extremely thin thickness of about 4 μm, and such a thin film is required to obtain a predetermined shape even when stacked. Die cutting itself is difficult.

An object of the present invention is to provide a film with a supporting lead, which is extremely easy to process and handle a thin film material used in such an application, and which can be continuously processed by automation if necessary.

(Means for Solving Problems) The object of the present invention is to provide a film sheet made of a thermoplastic resin, a support sheet having a surface treatment layer formed on one surface by a lamination treatment of the thermoplastic resin, and the film sheet. Different from the thermoplastic resin, the thermoplastic resin of the surface treatment layer is made of the same type of thermoplastic resin, and the surface treatment of the support sheet in a molten state at a temperature equal to or lower than the normal lamination treatment temperature of the thermoplastic resin. Between the layer and the film sheet, and a bonding layer that is cooled and solidified after being laminated by thermal extrusion, and the bonding layer is the same kind as the surface treatment layer for the supporting sheet side at the time of cooling and solidifying after the lamination. They are fixed together due to the compatibility of the thermoplastic resins of the above, and can be peeled off from the film sheet side by the mutual adhesion of the different thermoplastic resin surfaces. This is achieved by the above-mentioned film with supporting leads, which is characterized in that it is adapted to be bonded to each other.

(Function) In the film with supporting leads of the present invention, a thin thermoplastic resin film sheet and a supporting sheet for guiding and supporting the thin thermoplastic resin film are laminated between these sheets in a molten state and are cooled and solidified. Since the bonding layers are releasably bonded to each other via the bonding layer, the bonding layer adheres to both sheets at the time of melting and fixes the film sheet to the supporting sheet, and the bonding layer is easily peeled after solidification. Join the sheets together.

Therefore, if a supporting sheet having an appropriate thickness and rigidity is used, it functions as a backing material for the film sheet, so that no matter how thin the film sheet is, it can be easily punched into a desired shape. it can.

Further, even when a plurality of films with the support leads are stacked as a single-wafer product, the upper and lower film sheets do not come into direct contact with each other, so that the film can be easily taken out.

Further, since the support sheet imparts a certain degree of rigidity, it is extremely easy to set the film sheet during printing, for example.

Here, as described above, the film sheet and the support sheet are bonded to each other via the bonding layer of the thermoplastic resin that is cooled and solidified after being laminated in the molten state, so that both sheets are added during the normal handling. The external force of 1 does not cause peeling or displacement of each other. However, the film sheet and the bonding layer adhere to each other due to "wetting" during melting of the thermoplastic resin, and they remain bonded even after cooling and solidification, so there is a chance for some peeling. If given, the film sheet can be easily peeled off in the 90 ° to 180 ° direction.

According to the experimental results of the present inventors, the "wetting" binding force is almost the same when polyethylene terephthalate film (PET film) is used as the film sheet and polyethylene is used as the binding layer of the thermoplastic resin. 180 ° for 50 mm wide sheet samples
Measured as peeling force (peeling speed 500 mm / min, 23
C., 65.degree. RH), about 10 to 20 g. This is significantly lower than the peel strength with ordinary adhesives,
It is a value that gives almost no resistance when the sheet is peeled off. Hereinafter, such a special bonded state is referred to as "pseudo-bonding" in the present specification.

By the way, in such a film with a support lead, when the film sheet is peeled from the support sheet, the bonding layer of the thermoplastic resin is always accompanied by the support sheet side and remains on the film sheet side which is peeled off or the support sheet and the film. It is necessary not to cause so-called "competition" with the sheet.

In this regard, the film with support leads of the present invention,
A surface treatment layer made of the same kind of thermoplastic resin as the binder layer is applied to the side of the support sheet with respect to the binder layer by lamination or the like. Therefore, when the thermoplastic resin of the bonding layer is melted and solidified, the thermoplastic resin is compatible with and integrated with the surface treatment layer made of the same kind of thermoplastic resin,
This bonding force is much larger than the "pseudo-adhesion" strength between the film sheet and the bonding layer because both layers are so strong that they cannot be peeled off. Reliably transfer only to the side of the support sheet provided with the treatment layer.

(Embodiment) The present invention will be described below based on an embodiment shown in the drawings.

In FIG. 1, a film 1 with a support lead is a paper sheet 4 as a support sheet, a PET film 2 as a thin film sheet that is supported and guided by the paper sheet 4 and used for the final application, and between these sheets 2 and 4. It comprises a polyethylene layer 3 as a bonding layer which has been laminated in a molten state and then cooled and solidified, and a polyethylene layer 5 as a surface-treated layer formed by a laminating process on the surface of the paper sheet 4 with respect to the bonding layer 3.

The paper sheet 4 may be any material as long as it has sufficient thickness and rigidity to function as a support,
Any sheet material such as paper, aluminum foil paper or cloth foil can be used.

As the material for the film sheet, any thermoplastic resin other than the PET film can be used. For example, polypropylene, stretched polypropylene, polyvinyl chloride, or any commercially available film having an appropriate thickness can be selected according to the application. Can be used.

As the binding layer, any thermoplastic resin made of a material different from that of the film sheet can be used, but polypropylene or the like can be used in addition to the polyethylene in view of cost and easy availability.

The polyethylene layer 5 provided as a surface treatment layer on the side of the paper sheet 4 with respect to the polyethylene bonding layer 3 is formed from the same kind of material that is compatible with and integrated with the polyethylene layer 3 as the bonding layer when it melts. A resin of the same type as that of the bonding layer is selected according to the selection of the material of the bonding layer.

The scale for selecting such materials is the film sheet,
It is determined by the melting point, solidification temperature, fluidity, physical properties such as specific gravity and chemical properties of the thermoplastic resins constituting the bonding layer and the surface treatment layer, but in practice, the melting point of the thermoplastic resin of the film sheet is If selected on the basis of higher than the melting point of the thermoplastic resin of the tie layer, almost satisfactory results are obtained. For example, a combination of PET film 2 + polyethylene layer + polyethylene surface-treated layer 5, or stretched polypropylene film 2 + polyethylene layer 3 + polyethylene surface-treated layer 5 is preferably mentioned as a preferable source.

The support lead-attached film 1 is easily manufactured by applying a known technique.

For example, first, polyethylene is formed on one side of the paper sheet 4 by thermal lamination at a normal laminating temperature of 320 ° C. and then cooled and solidified to form a polyethylene surface treatment layer 5 integrated with the paper sheet 4. The thickness of the surface-treated layer 5 is preferably a minimum amount necessary to sufficiently fill the gaps of the paper fibers on the surface, that is, 10 to 30 μm.
Next, the surface of the paper sheet 4 having the polyethylene surface-treated layer 5 and the PET film 2 having a thickness of 25 μm are opposed to each other, and polyethylene is continuously supplied between both sheets by hot extrusion, and these are pressure-laminated. It is cooled and solidified later.

In the support lead-attached film 1, the polyethylene bonding layer 3 is integrally fixed to the paper sheet 4 by compatibilization with the polyethylene surface treatment layer 5 of the same kind laminated on the paper sheet 4, and to the PET film 2. The thin PET film 2 which is peelably bonded by the pseudo-adhesion and which is usually difficult to handle is easily subjected to punching and other treatment as a laminated film integrally backed with a paper sheet 4 and having an appropriate thickness and rigidity. be able to.

Next, FIG. 2 is an explanatory view showing an example in which the present invention is applied as a form of a long continuous sheet used for an inner lid of a cosmetic,
The parts corresponding to those in FIG. 1 are designated by the same reference numerals.
In this example, a long thick PET film 2 is continuously integrated on a long paper sheet 4 via a polyethylene bonding layer 3, and then a film portion 2, 2 having a desired pattern (circular in the illustrated example) is formed by punching. , Are formed at a predetermined interval, and then the residue is removed (in the figure, the polyethylene surface treatment layer is covered with the polyethylene bonding layer 3 integrated therewith). In this case, it is also possible to perform printing and punching at the same time using a sticker printing machine.

The film with support leads 1 thus obtained is cut into a predetermined length, for example, to obtain a sheet-shaped product including a plurality of film patterns, and each film pattern (inner lid) 2 as a final product is manually processed into paper. The sheets 4 are peeled one by one. When continuous treatment is desired, the film 1 with supporting leads wound on a roll is drawn out as shown in FIG.
It is also possible to continuously peel off. That is, when the end portion of the film with support leads 1 is bent via the roller 6 and pulled downward, the film sheet 2 does not follow the bending of the paper sheet 4 due to its rigidity, and the leading end portion is not shown as shown in the figure. Turn up. Therefore, the films 2 are peeled off one by one and placed in a cosmetic container as an inner lid. At this time, since the film sheet 2 can be naturally peeled off by bending the paper sheet 4 at a certain angle as described above, the film sheet 2 should be peeled off using a labeler or the like and placed in the cosmetic container. It can also be automated as appropriate.

When using an automatic labeler, the film sheet 2 needs to be peeled off very easily. Therefore, as the material of the film sheet 2, it is preferable to use a PET film, a stretched polypropylene film, or the like having a strong so-called “strain”, and the thickness thereof is preferably 50 μm or more.

In each of the above embodiments, the support lead-attached film of the present invention has been described by taking the inner lid of the cosmetic container as an example, but the present invention can be similarly applied to thin film sheets for other purposes. For example, a small electronic calculator or the like is often made by punching a synthetic resin film as an electric insulator into a predetermined pattern. Some of such films have a thickness of about 4 μm. Die cutting and other handling are extremely difficult. In such a case, when the supporting lead-attached film of the present invention is used, the lead paper-attached film as a whole has appropriate rigidity, so that a pattern having a desired shape can be easily punched. It is also possible to process thin film sheets as long as they can be releasably adhered to the tie layer by wetting.

And in any application, the thermoplastic resin layer of the bonding layer used for bonding the film sheet and the supporting sheet surely moves to the supporting sheet side at the time of peeling the sheet and remains on the surface of the film sheet to stain it. There is nothing to do.

(Effect of the Invention) As described above, in the film with supporting leads of the present invention, the thermoplastic resin of the film sheet is laminated on the supporting sheet via the bonding layer of different thermoplastic resins in a molten state, and Since the surface treatment layer made of the same kind of thermoplastic resin as the bonding layer is provided in advance on the side of the supporting sheet with respect to the bonding layer, die-cutting of the film sheet and other processing become reliable and easy. ,
The work efficiency can be greatly improved and the yield can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a basic embodiment of the present invention,
FIG. 2 is an explanatory view showing an application example of the present invention. 1 Film with Support Leads 2 Film Sheet (PET Film) 3 Bonding Layer (Polyethylene) 4 Support Sheet (Paper Sheet) 5 Surface Treatment Layer (Polyethylene) 6 Roller

Claims (4)

[Scope of utility model registration request] 1. A film sheet 2 made of a thermoplastic resin,
Unlike the thermoplastic resin of the support sheet 4 having the surface-treated 5 layers formed by the lamination treatment of the thermoplastic resin on one surface and the thermoplastic resin of the film sheet 2, the thermoplastic resin of the surface-treated layer 5 is of the same kind. The support sheet 4 is made of a thermoplastic resin and is in a molten state at a temperature equal to or lower than a normal lamination treatment temperature of the thermoplastic resin.
Between the surface-treated layer 5 and the film sheet, and the bonding layer 3 which is cooled and solidified after being laminated by thermal extrusion. The surface treatment layer 5 and the same kind of thermoplastic resin are compatible with each other to be fixed integrally, and the film sheet 2 side is detachably bonded by mutual adhesion of different kinds of thermoplastic resin surfaces. The film with support leads as described above. 2. The film with support leads according to claim 1, wherein the thermoplastic resin is polyethylene. 3. The film with support leads according to claim 1, wherein the film sheet 2 is selected from the group consisting of polyethylene terephthalate and polypropylene film. 4. The film with support leads according to claim 1, wherein the support sheet 4 is selected from the group consisting of paper and metal foil paper.