JPS6283199A - Method of protecting print - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the lamination processing of prints formed by recording images on paper etc. using a recording method using a recording liquid, particularly an inkjet recording method. How to protect your prints.

[Conventional technology]

The inkjet recording method is a recording method that performs recording by depositing small droplets of recording liquid onto a recording material such as paper from the orifice of a recording head, and generates little noise and does not require special fixing processing. - It is attracting attention as a recording method that allows high-speed recording and full-color recording.

The recording liquid used in this inkjet recording method is generally formed from a recording agent such as a dye, and water as a solvent or a mixture of water and various solvents.

The recording material is required to have excellent recording liquid absorption and fixing properties. Among these, in multicolor inkjet recording using recording liquids of 12 or more colors, the amount of recording liquid that adheres to the recording material is large, so the absorption and fixing properties of the recording liquid are particularly excellent. This is required.

Known recording materials with such excellent properties include those in which a recording liquid receiving layer made of a porous material with excellent recording liquid absorption and fixing properties is provided on a base material such as paper. .

In the inkjet recording method, since water-based inks are mainly used, the recorded images do not necessarily have sufficient water resistance, solvent resistance, abrasion resistance, etc., and also have the disadvantage that drying and fixing after recording takes time.

During storage, recorded images tend to deteriorate, and there are also problems with the storage stability of prints.

As a method for solving the above-mentioned problems regarding storage durability and improving storage stability, a method of laminating a transparent resin film on a recorded image is known.

As one method of such lamination processing, a method using a transfer release type film is known.

In this method, a transfer layer made of mainly transparent resin is laminated on a film-like base material (release base), which serves as a support, by a known lamination method such as the barcode method. Crimp onto the base material (peelable base)
In this method, a transfer layer is coated on an image by peeling off only the transfer layer.

By applying this method, the transfer layer transferred onto the print is required to have excellent properties such as water resistance, solvent resistance, and light resistance in order to improve the storage stability of the image.

9 layers ensure stable storage of images! In order to improve this, it is required to have excellent properties such as water resistance, solvent resistance, and light resistance.

In addition, in order to apply this method as easily as possible, 1) the transfer layer and the base material (release base) must have good peelability, and 2) the transfer layer must be transferred onto the print at a temperature as close to room temperature as possible. It is hoped that this will happen.

Furthermore, it is also desired that the transfer layer transferred by this method exhibits high blocking resistance. That is, for example, if a plurality of laminated prints are stacked on top of each other when storing or transporting them, if they block each other, there is a risk that the images will be damaged when the prints are peeled off from each other.

As described above, there are various characteristics required for print protection members, and various studies have been carried out to improve these characteristics.

(Problem to be solved by the invention) However, when laminated prints are actually handled, they are often stacked, and the occurrence of blocking can be fatal to the image. Although it is one of the most strongly desired characteristics for the transfer layer to have high resistance to scratches and scratches, there is still no effective means to fully meet this demand. The current situation is that it is not found.

An object of the present invention is to provide a print protection method that is extremely unlikely to cause blocking and has almost no risk of image damage when laminated prints are superimposed on each other.

[Means for solving problems]

The present invention, which can achieve the above object, uses a transfer-releasable print protection member that is composed of a transfer layer laminated on a base material and has been evaluated as having no tackiness according to the JIS Z 02+9 tack resistance test method. This is a unique print protection method.

First, the structure of the print protection member used in the method of the present invention will be explained with reference to the drawings.

FIG. 1 is a partial cross-sectional view of an example of this print protection member.

This print protection member basically covers the surface (on which the image is recorded) of a printed matter (print) formed with recording liquid.
It is composed of a transfer layer 1 that is transferred and laminated onto a recording image surface) and a base material 2 that supports the transfer layer.

The transfer layer 1 is attached to the base material 2 so that it can be peeled off from the base material 2 when it is transferred and laminated onto the recorded image surface of a print formed by recording an image on a recording material such as paper with a recording liquid. It is supported by

The transfer layer 1 is laminated onto the print while supported on the base material 2 so as to be able to move over the recorded image to be laminated. It is attached to the image surface and remains there, functioning as a protective layer for the recorded image. Note that the base material 2 is peeled off from the transfer layer after the transfer layer is adhered onto the recorded image.
Therefore, as described above, only the transfer layer 1 remains on the recorded image as a protective layer for the recorded image.

The transfer layer 1 has various shapes and sizes corresponding to the shape and size of the recorded image covered by the transfer layer. On the other hand, the base material 2 has a shape and size that can support at least the transfer layer 1.

The print protection member used in the method of the present invention has the above-described structure, and was evaluated as having "no tackiness" according to the tack resistance test method specified in JIS Z 0219.

The adhesion resistance test method specified in JIS l 0219 is a test for a field completely different from the present invention, that is, it is generally known as the adhesion resistance test for wrapping paper, but its outline is as follows. That's right.

That is, as shown in FIG. 2, four test pieces 4 (
In the present invention, a print protection member is used. ) is placed on the floor plate 5 shown in FIG.
The four test pieces 4 and pressure block 7 stacked in the same manner as above are stacked one after another and placed in a desiccator.Next, the desiccator is placed in a heating device set at a predetermined temperature for 24±1 hours. put. Although three conditions are listed for this temperature in JIS, in the present invention it is set to 40°C. After this time, the two sets of four test-acceptable sheets were taken out of the desicake, still in a stack, and sealed indoors for 30 minutes. Thereafter, each test piece 4 is slid or peeled off, and the surface and state of the test piece 4 when peeled off are observed.

As a result of this observation, ``a specimen in which the surfaces in contact slide freely against each other, there is no adhesion or adhesion, and there are no scratches on the surface when the test piece is removed'' is evaluated as ``non-adhesive.'' Note that the weight of the pressure prodder is 500±59, and the metal plate is made of aluminum or brass.

Print protection member used in the method of the present invention, immediately JIS
In order to produce a "non-adhesive" print protection member using the adhesion resistance test method according to Z 0219, each material and combination thereof should be appropriately selected from the following examples of base materials and transfer layer materials. Furthermore, it is possible by appropriately selecting various conditions (for example, drying temperature of the transfer layer) during production using these materials.

The base material may be paper, cloth, plastic film, etc. coated with a release treatment agent having various release properties such as silicone resin, or Mylar film, polypropylene film, etc. as listed below. Examples include films that have peeling properties for the transfer layer.

Materials for the transfer layer 1 include ethyl cellulose and acetic acid, which can be laminated with sufficient adhesive strength on the surface of the recorded image and can impart properties such as water resistance, abrasion resistance, and solvent resistance to the recorded image. Examples include thermoplastic resins such as vinyl resins and their derivatives, polyethylene, ethylene-vinyl acetate copolymers, butyral resins, acrylic resins, polystyrene and their copolymers, polyisobutylene, hydrocarbon resins, polypropylene, polyamide resins, and polyester resins. It will be done.

When selecting the above-mentioned materials and manufacturing conditions, we have taken into account that other properties required for the print retaining member 1 are as high as possible, resulting in not only excellent blocking resistance but also excellent image quality. A print protection member that can provide high storage stability and can also be easily laminated can be produced.

In addition, if the material of the transfer layer is selected in consideration of the fact that the layer is transferred to a print and the outer surface of the transfer layer on which the base material is pricked ends up in a glossy state, Gloss can be imparted to the surface of the recorded image surface. Furthermore, various additives such as waxes, plasticizers, tackifiers, antioxidants, ultraviolet acid agents, and light stabilizers may be used as auxiliary materials for the transfer layer.

In addition, the print protection member used in the present invention is suitable for laminating only one side (image side) of the print, so if the transfer layer is to be attached to the print by heat treatment, The shrinkage rate of the transfer layer due to temperature changes after processing is at the same level as the shrinkage rate of the print, or at a level that does not cause curling of the laminated print due to shrinkage of the transfer layer. 6. Select the material and manufacturing conditions.6.
An embodiment of the method of the present invention using a print protection member as described above will be described.

First, as shown in FIG. 4(a), the recorded image surface 3a of the print 3 formed by a recording method using a recording liquid such as an inkjet recording method is protected against viscosity by the test method of JIS 202+9. Overlap the parts. At this time, it is positioned so that the recorded image 3a of the print is directly and sufficiently covered by the transfer layer 1 of the print protection member.

Next, this is processed by a laminating device equipped with a pressure roller and the like, and a print protection member is heat-pressed onto the print via the transfer layer 1 on the recording image surface 3a. Through this process, the transfer layer 1 is adhered to the recording image surface 3a of the print.

Note that conditions such as pressure and temperature during heat-press bonding are appropriately selected depending on the material used for the transfer layer so that the surface of the transfer layer can be melted and adhered to the recording surface, for example.

Next, in a state where sufficient adhesion of the transfer layer 1 to the recording image surface 3a is obtained, the base material 2 is peeled off from the transfer layer 1, and as shown in FIG. 4(b), the recording image surface is The lamination process is completed, leaving only the transfer layer 1 on 3a.

[For production]

The print protection member used in the present invention, which is non-adhesive according to JIS Z 0219, has a transfer layer that is resistant to blocking to the extent that it does not exhibit adhesion under normal conditions, even when the transfer layers are stacked facing each other. is excellent.

This property is maintained even when the transfer layer is transferred. Therefore, prints laminated (to which the transfer layer has been transferred) by the method of the present invention also exhibit the same high blocking resistance as described above.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example transparent paint (NA composition): ' Nisrex BL-3 100 parts by weight (trade name, manufactured by Tsukiki Kagaku ■, 20% toluene, IPA, n-butanol solution of polyvinyl butyral resin) Cyasorb UV-241, 2 parts by weight (trade name, manufactured by ACC, ultraviolet absorber) Tinugon 14
4 0.2 parts x 1 part (trade name, manufactured by Ciba Geigy, light stabilizer) 2 A bar coater was used to apply the transparent paint having the above composition onto a 50 μ thick PET (polyethylene terephthalate) film so that the dry film thickness was 15 μ. This is dried to form a transfer layer on the PET film.
From IS Z 02+9 Adhesion Resistance Test Method 1, a transfer-release type protective member used in the method of the present invention that exhibits no adhesion was obtained.

The above-mentioned print protection member is laminated with a laminator (MSS Lamipet-23OA': manufactured by Meiko Shokai) on a print on which an image has been recorded by inkjet recording,
A plurality of samples protected by the method of the present invention were obtained. These samples were subjected to JIS202+9 (temperature condition 4
When evaluated at 0° C.), there was no blocking at all. In addition, when these samples were stored in the housing cover of a commercially available photo album (made of polypropylene and polypropylene, for example),
(at room temperature, 3 months) No blocking was observed at all.

Comparative example transparent paint (composition) Daisenal LR-216 100 parts by weight (trade name, manufactured by Mitsubishi Rayon Company, 40% toluene solution of acrylic resin) Sheasorb UV-241, 2 parts by weight (trade name, manufactured by ACC Company, ultraviolet rays) absorbent).

Chinudon 144 0.2 weight 1 part (trade name, manufactured by Ciba Geigy, light stabilizer) A transparent paint with the above composition was applied to a PE film with a thickness of 50 scales using a bar coater so that the dry film thickness was 15 μ. This was dried to form five layers on the PET film, and a plurality of transfer-release type print protection members were obtained. J'l
According to the tack resistance test method of S Z 0219, slight tackiness was observed between the transfer surfaces.

Next, prints similar to those used in Examples were laminated in a similar manner to obtain a plurality of laminated samples. JIS 202+9 (Temperature condition 40℃
), it was found that the prints could not be protected due to significant protonation between the transfer surfaces on the print and between the transfer surface and the back side of the recording paper. Also, when the image was stored in an album, blocking occurred at the gate between the album housing cover and the transfer surface on the print.

(Effects of the Invention) As detailed above, the method of the present invention using a non-adhesive print protection member was tested according to the JIS Z 0219 test method (therefore, laminated prints have high blocking resistance). Even when multiple prints are stacked, blocking is extremely difficult to occur.As a result, the risk of image damage has been drastically reduced, making it possible to stack prints with confidence.

Furthermore, due to the high anti-blocking '1 afforded to the print by carrying out the method of the present invention, blocking may also occur when the print is housed in an album storage cover or the like commonly used for archival purposes. gender has become very small. Therefore, it is now possible to safely store prints in albums, etc.

[Brief explanation of drawings]

Figure 1 is a partial cross-sectional view of an example of a print protection member used in the method of the present invention, Figure 2 is a diagram showing the state of a test piece used in the JIS l 0219 test method, and Figure 3 is a diagram showing the state of implementation of the test method. Figures 4(a) and 4(b) illustrate the process of laminating a print using the protective member of the present invention using partial cross-sections of the print to be processed and the protective member used. It is a diagram. 1: Transfer layer 2: Base material 3 Niblint 3a: Recorded image surface 4; Test piece
5: Floorboard

Claims (1)

[Claims] A transfer layer is laminated on a base material, and JIS Z0219
A print protection method characterized by using a transfer-releasable print protection member that has been evaluated as having no tackiness according to the tack resistance test method.