JPH01221480A - Stratified structure of self-adhesive and photographic sheet made by utilizing it - Google Patents

Abstract

PURPOSE:To obtain a stratified structure which usually has such a weak tack that it can be released and re-stuck and which can also reveal a strong tack, by providing a self-adhesive layer having a certain tack with a release paper having a number of openings. CONSTITUTION:This stratified structure consists of a self-adhesive layer having a certain tack and a release paper having a number of openings and being provided at least on one side of this self-adhesive layer. A self-adhesive layer having a certain tack may be formed on the rear of a supporting base material of a photographic sheet and a release paper having a number of openings is put on this self-adhesive layer to be joined. Then a plain release paper without opening is provided thereon. By this technique, a photoprint obtained from a photographic sheet after developing is usually releasable and, in addition, the handling of the photoprint can be greatly facilitated since it can be fixed to, e.g., a mount of an album immediately by merely removing a release paper.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an adhesive layer that normally has a weak adhesive force that can be removable, but quickly develops a strong adhesive force if desired by the user. The present invention relates to a structure and a photographic sheet using the same.

[Conventional technology]

Pressure-sensitive adhesives are freely designed for weak adhesion to strong adhesion depending on the purpose, and their uses are wide-ranging. However, many of the products currently on the market are limited to one use; for example, in the case of so-called removable pressure-sensitive adhesives for weak adhesion, they can only be used as removable adhesives. When you want to attach a sheet coated with , such as a photo sheet, to an album, etc., and you want to bond it stronger than weak adhesive, you end up bringing the strong adhesive from the side and reattach it. was doing

[Problem to be solved by the invention]

In particular, as mentioned above, when fixing printed photos to mounts, albums, etc., double-sided adhesive tape is pasted to the back of the printed photos, but it is not possible to paste them as desired at -degrees. It is not always possible to do so, and people often make mistakes such as pasting at an angle. Therefore, it would be very convenient if there were a pressure-sensitive adhesive that could be removable and reapplied at will, and could be strongly bonded with a simple operation.

[Purpose of the invention]

The present invention has a layered structure of an adhesive that normally has a weak adhesive force that can be re-peeled and re-attached, but can also exhibit stronger adhesive force according to the user's wishes. It is an object of the present invention to provide photographic sheets 1 to 1 using this.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a release paper having a large number of openings on at least one side of an adhesive layer having a certain adhesive strength.

In addition, an adhesive layer having a certain adhesive force is provided on the back side of the support of the photographic sheet, a release paper with a large number of openings is provided on this adhesive layer, and a release paper with no openings is provided on the release paper. It is equipped with release paper.

[Effect]

According to the above configuration, although it is usually removable, it can be immediately fixed to an album mount or the like by performing a simple operation of peeling off the release paper having a large number of openings.

Embodiments of the present invention will be described in detail below with reference to the drawings.

(Example) In FIG. 1 showing a cross section of a double-sided adhesive tape 1 according to a first embodiment of the present invention, this double-sided adhesive tape 1 is a double-sided adhesive tape 10° having a separator B, for example, DI manufactured by Toyo Ink Manufacturing Co., Ltd. -2760KMS-90 as a base, this double-sided adhesive tape 10 is provided with a mesh separator 12 having a large number of openings on the - side on the strong adhesive 11.

As this net-like separator 12, for example, 66X-832 manufactured by Fujimori Kogyo (■) with a rectangular opening as shown in the figure is used, and the easily peelable surface is bonded to the strong adhesive 11. In addition, the strong adhesive 11 raised from the opening of the net-like separator 12 has a separator A1, for example, 66X-8
32 overprinted surfaces are joined.

The effect of providing the mesh separator 12 in the double-sided pressure-sensitive adhesive tape 1 configured as described above will be tested. First, in order to prevent separator B from being accidentally peeled off during the test and the test data becoming inaccurate, remove the interfering separator B and apply Toshi Lumirror colored type white 75X20 to the strong adhesive 11. Join. Peel off the separator A from this double-sided adhesive tape 1 and attach it to the Xerox paper.
When the adhesive strength of SZO237-1980 was measured using the 180 degree peeling method, the adhesive strength was 100 g/25 mm width when the thickness of the mesh of the mesh separator 12 was 2 mm and the length of one side of one opening was 3 mm. , the adhesive force is 200g/25mm width when the length of one side of the opening is 4mm,
The adhesive strength is 400 when the length of one side of the opening is 5 mm.
g/25mm width. Then, the mesh separator 12 is peeled off from the strong adhesive 11 and the strong adhesive 11 is removed.
When the adhesive force was measured, the material broke at 700 g/25 mm1.

As the net separator, in addition to the above-mentioned release paper with openings, various synthetic resin nets 15 and nonwoven fabrics can be used as shown in FIG.

FIG. 3 shows an example in which the above-mentioned double-sided adhesive tape 1 is used for pasting a printed photograph (printed on photographic paper by stretching it from a negative film). Double-sided adhesive tape 1
Peel off the separator B and paste it on the back side of the printed photo 18. Furthermore, when the separator strip A is peeled off from the double-sided adhesive tape 1, the strong adhesive 11 to which the mesh separator 12 is bonded is exposed. The adhesive force of this strong adhesive 11 is reduced by the amount covered by the rope of the mesh separator 12, so the function of the strong adhesive is not fully demonstrated, and it has only a weak adhesive force, so it can be re-peeled. It becomes.

Therefore, it is possible to repeat peeling off and re-sticking the printed photograph 18 while actually pasting it on the mount 20 of the album as shown in the figure, until the position where the printed photograph 18 should be pasted is determined.

Once the position for pasting the printed photo 18 has been determined, if you want to fix it, do not peel off the rope-like separator 12. by this,
Since the back side of the printed photo 18 is coated with only the strong adhesive 11, the strong adhesive force of the strong adhesive 11 makes the printed photo 1
8 can be firmly fixed to the mount 2o. Of course, this double-sided adhesive tape 1 can also be used as a double-sided adhesive sheet pre-cut to match the size of the printed photograph 18.

The fourth example shows an example in which the layer structure of the first example described above was used for a sealing layer of a peelable type self-developing film unit (hereinafter abbreviated as film unit). This film unit I~ is disclosed in Utility Application No. 170806/1983 filed by the present applicant, but will be briefly explained. The film unit 25 includes a mask sheet 26 in which a screen opening is formed, a photosensitive sheet 27 bonded to cover the screen opening, a strong adhesive 36 bonded to the photosensitive sheet 27, and a strong adhesive 36 bonded to the photosensitive sheet 27. The mesh separator 37 bonded to the top, the separator C bonded to the strong adhesive 36 raised from each opening of the mesh separator 37, the developer bottle 28 containing the development solution, and the excess development solution. It consists of a trap 29 for capturing, and a cover sheet 30 joined to both ends of the mask sheet 26 and both sides via rails of a constant thickness. The photosensitive sheet 27 has a photosensitive layer 32. Release layer 33.
Image receiving layer 34. It consists of a support body 35.

After the film unit 25 configured in this way is exposed to light, it is sandwiched between developing rollers (not shown) built into the camera and transported. During this transport, the developer bond 28 is developed. As the developer container 28 is torn apart by a roller, the developer solution sealed in the developer container 28 is spread out between the cover sheet 30 and the photosensitive sheet 27 . When the developing solution is spread on the upper surface of the photosensitive layer 32 of the photosensitive sheet 27, the image formed on the photosensitive layer 32 is gradually received by the image receiving layer 34 via the peeling layer 33.

After a predetermined development time, the image-receiving layer 34 is peeled off from the release layer 33 together with the support 35, and an image can be obtained on the image-receiving layer 34. If the separator C is peeled off from the back side of the support 35, the printed photograph 18 shown in FIG.
In the same way, it can be removably pasted on albums, etc., and when you want to fix it, just peel off the mesh separator 36, and the strong adhesive force of the strong adhesive 36 will be immediately available, allowing you to attach it to the album mount, etc. can be firmly fixed. 4 [Effects of the Invention] As explained above, the layered structure of the adhesive, which is one aspect of the present invention, is such that a release paper with a large number of openings is provided on at least one side of the adhesive layer having a certain adhesive strength. So,
To provide a layered structure of an adhesive which can be conveniently used as a removable adhesive layer in general, and which immediately exhibits a certain adhesive force by a simple operation of peeling off a release paper when fixation is desired. You will be able to do this.

In addition, an adhesive layer with a certain adhesive strength is applied to the back side of the support of the photographic sheet, a release paper with many openings is bonded on top of this adhesive layer, and a release paper with no openings is bonded on top of this adhesive layer. A normal release paper was provided =9-. Therefore, printed photographs obtained from photographic sheets after processing are usually removable and
Since it becomes possible to immediately fix the photos to an album mount or the like by the simple operation of peeling off the release paper, it becomes very convenient to handle the printed photos obtained from photo sheets 1 to 3.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention. FIG. 2 is a plan view showing an example of a mesh separator. FIG. 3 is a perspective view showing an example in which the first embodiment of the present invention is used for pasting printed photographs. FIG. 4 is a sectional view showing an example in which the present invention is applied to a sealing layer of a self-developing film unit. 1... Double-sided adhesive tape 10... Double-sided strong adhesive tape 11.36... Strong adhesive -1,0-- 12.37... Net separator 18... Printed photo 25... Film unit 27... Photosensitive sheet . 1 (Face γ occupation Dare) Figure

Claims (2)

[Claims] (1) An adhesive layer structure comprising an adhesive layer having a certain adhesive strength and a release paper provided on at least one side of the adhesive layer and having a large number of openings. (2) In a photographic sheet, an adhesive layer having a certain adhesive strength is provided on the back side of the photosensitive material support, and a release paper with many openings is provided on this strong adhesive layer, and A photographic sheet characterized in that a release paper is provided so as to be bonded to the strong adhesive layer raised from the opening.