JP2017035864A - Sticking method for protective film in protective sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method with which a protective film can be stuck neatly even by a general user by accurately placing a protective sheet material on a liquid crystal screen of a device to be stuck therewith so as to make it possible to stick the protective film thereto and so as to avoid resticking due to a failure.SOLUTION: A protective sheet material 1, which comprises an adhesive material layer covered with a release material 2 composed of a flexible, soft, and transparent synthetic resin raw material, is configured such that it can be partitioned at a part of a notch 7 with an operation of bending the release material 2 by printing a frame line at a predetermined position of the release material 2 and making the notch 7 with a depth of 90% or more of the thickness therein. In a sticking method of a protective film: the frame line is aligned with a liquid crystal screen DS; in a state in which the one end side of the protective sheet 1 is pressed down, the other end is lifted up so as to bend the protective sheet 1; a half of the release material 2 is completely removed while holding the cut end 2A isolated from the adhesive material layer; and a protective film 4 is stuck to and fixed on an accurate position on halves.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an improvement in a protective sheet material used in a method for attaching a protective film in a protective sheet material for protecting a screen of a target device having a liquid crystal screen such as a mobile phone and a personal computer.

For example, liquid crystal screens are used as display means for electronic devices such as mobile phones, portable game machines, tablet machines, personal computers, or control devices, but these liquid crystal screens are exposed to the outside. It is easily damaged by contact with nails or other objects, and for that purpose, it is required to apply a protective film.
As such a protective film, generally, a resin film (sheet) is used as a base material, which is pasted in the final process of the product, or purchased separately by an individual user such as a mobile phone and pasted by itself. Yes.

  Specifically, as shown in FIG. 9 and FIG. 10 (enlarged longitudinal sectional view), such a protective sheet is generally adsorbed on one side of a substrate 4 made of a resin film (PET: polyethylene terephthalate). A release material 2 (separator layer) of another resin film (which may be obtained by subjecting a paper material to a release treatment) is usually provided in order to provide a layer of the adhesive material 3 and to protect the surface. Affixed, cut to a required size, transported and sold in this state, and the user peels off the release material 2 and attaches it to the target liquid crystal screen or the like with the layer of the adhesive material 3.

  Therefore, what is on the market is in a state where the release material 2 is pasted, and in the present invention, this is referred to as a protective sheet material 1.

  For example, when the protective sheet material 1 described above is attached to a liquid crystal screen of a device to be attached, the release material 2 is peeled from the protective sheet 6 and attached to the screen. The protective sheet material 1 having a required size is cut from the protective sheet material 1 having a standard size (sometimes having a predetermined size in advance in the manufacturing process), and the release material 2 over the entire area of the obtained protective sheet material 1 is removed. When the protective sheet 6 is to be attached to the liquid crystal screen after peeling, fingers stick to the layer of the adhesive material 3 on the entire surface of the protective sheet 6 and it becomes difficult to position the end of the attachment position with respect to the liquid crystal screen. Moreover, it is difficult to perform smoothly without sticking when sticking in order from the end of the protective sheet 6. And when sticking is repeated many times, the problem that dust etc. enter also arises.

  Therefore, in the prior art, a cut (cut) is made in advance in the release material 2, first the release material 2 that can be partially peeled is peeled off, and a part of the exposed adhesive material 3 is temporarily fixed to the liquid crystal screen. Then, the method of sticking on the liquid crystal screen sequentially while peeling off the remaining release material 2 has been adopted.

The following documents can be given as conventional techniques related to such a protective sheet material.
JP2011-74109A JP 2001-293780 A JP2012-25057

Therefore, in order to perform the above-described smooth sticking, or to solve the problem of wrinkles and contamination such as dust, a cut 7 is made in the release material 2, but the following problems have occurred.
That is, as shown in FIGS. 9 and 10, when such a cut 7 is formed, a slitting machine as shown in FIG. 11 is used to directly cut the protective sheet material 1 from the release material 2 (separator layer) side. There is a possibility that the applied silicone adsorbing adhesive material 3 layer is also cut.

Further, since the base material 4, the adhesive material 3 on both sides and the surface protective film 5, that is, the protective sheet 6, can be said to be basically a resin layer, even if incomplete cutting is attempted, When the slitter machine shown in FIG. 11 is used, the resin layer that can be compressed and deformed is pressed and cut with a roller with a blade or the like, and a concave portion is generated in the layer of the silicone adsorbing adhesive material 3.
When such a concave portion is formed, when the protective sheet 6 is stuck on the screen, air enters and becomes wrinkled, or the screen becomes difficult to see due to the reflected light due to the light refraction of the concave portion. There's a problem.

  Further, there is a method in which the release material 2 (separator layer) is peeled off from the layer of the adhesive material 3 and then separately cut and pasted again, but in this method, the strip of the cut release material 2 is reattached. When wearing, it is difficult to completely adhere to each other. As a result, a cut line mark due to thin pieces is generated in the layer of the silicone-adhesive adhesive material 3, and the cut line mark disappears after being applied to the screen. There was a problem in using it for products that can be visually confirmed, such as a protective film for screens and a light scattering prevention film.

  In addition, in the case of the back cut by the complete cutting of the conventional release material 2, there are many cases where the adhesive solvent of the adhesive material 3 oozes out from the cut line (see FIG. 10) and adheres to the surface of the protective sheet 6. In addition, dust and the like adhering thereto are fixed and difficult to remove easily, and there are many problems in use after sticking to a liquid crystal screen.

Thus, in the past, the following problems have been summarized.
1) When a completely cut cut is made in the release material (separator), a cut line mark is attached to the layer of the silicone adsorbing adhesive material, which becomes an obstacle after being attached to a liquid crystal screen or the like.
2) Further, the adhesive solvent in the adhesive material layer oozes out from the complete cutting line, which causes a problem.
3) Furthermore, even when the release material is cut in advance and then aligned and adhered to the adhesive material layer, the separated release material butt line remains in the adhesive material layer. It becomes annoying when pasted on a screen or the like.

  Therefore, in view of such problems, the present inventor can partially peel and cut the release material attached to the protective sheet protecting the liquid crystal screen and the like, and can easily temporarily fix it with the exposed adhesive layer. We thought that it would be hard to slip, could be stuck smoothly while avoiding the entry of dust, and that the appearance after sticking would be finished neatly so that no incision marks or the like were left on the adhesive material layer. .

  However, the sticking method has been improved by taking the measures as described above, but it is difficult to reliably place the protective sheet material at the correct position of the required sticking device, and it is not possible to reattach. The problem remains that smooth and accurate pasting is not possible.

  The present invention enables the protective sheet material to be accurately placed on the liquid crystal screen of the application device so that the protective film can be applied, avoids reattachment due to failure, and provides a clean application of the protective film. The aim is to be able to do it.

The method for applying the protective film in the protective sheet material according to the present invention includes a layer of the adhesive material (3) on one side of the protective film (4) made of a transparent synthetic resin material, and the layer of the adhesive material (3) is provided. A protective sheet material that is coated with a release material (2), and in use, the release material (2) is peeled off and attached to the liquid crystal screen of a required application target device by the adhesive force of the adhesive material (3). There,
The release material (2) is composed of a flexible and transparent synthetic resin material having flexibility, and a frame line (20) indicating a peripheral frame of the liquid crystal screen of the application target device is printed on one surface thereof. 90% of the thickness of the release material (2) from the outer surface side of the release material (2) at a predetermined position after the release material (2) is overlaid on the adhesive material (3) layer. The above-mentioned depth of cut (7) is formed, and the release material (2) is configured so that the release material (2) can be divided and cut at the portion of the cut (7) by the bending operation,
The frame line (20) is placed in alignment with the liquid crystal screen of the device to be pasted, and the notch (7) is bent by lifting the other end upward while pressing the one end side of the protective sheet (1). )
By the divided cutting, the lifted side cut end (2A) lifted from the layer of the adhesive material (3) by the restoring force due to the flexibility of the release material (2) is gripped and the adhesive material (3 ) And completely remove half of the lifted release material (2) from the layer,
Next, the part of the protective film (4) from which the release material (2) has been peeled off is adhered and fixed to the liquid crystal screen,
After that, this time, the attached protective film (4) is pressed, the end of the protective sheet (1) on the opposite side is gripped, the whole is lifted upward, and the remaining release material (2 ) Is lifted from the layer of the adhesive material (3) of the protective film (4) due to its flexibility, and the remaining release material (2) is completely peeled and removed by grasping the end (2B). Therefore, the remaining part of the protective film (4) is also attached to the liquid crystal screen.

In the present invention, the target devices include electronic devices such as mobile phones and smartphones (trade names), portable size PCs, and the like. Therefore, the liquid crystal screen is not limited to a rectangle, but also a circle, a trapezoid, and the like.
The frame line referred to in the present invention includes a rectangle, a circle, a star, a polygon, and the like, and may be any as long as it can correspond to any position display portion indicating the liquid crystal screen position of the pasting target device. In addition, the line includes a solid line, a one-dot chain line, a two-dot chain line (virtual line), a broken line, and the like. Further, it may be a next mark indicating a corner of the liquid crystal screen.
And the said notch | incision (7) means the slit which leaves a slight thickness instead of a complete fracture state. This incision includes not only the case where the protective sheet material is divided into two in the horizontal direction and the upper and lower portions are sequentially applied, but also the case where the protective sheet material is divided in the vertical direction and the left and right portions are sequentially applied.

According to the present invention, due to the presence of the border of the release material, it can be accurately placed on the liquid crystal screen of the device to be pasted, while pressing the one end side of the protective sheet by the flexibility and cutting of the release material, By performing the operation of lifting the other end side, it is possible to divide at the cutting position and fix them in half, so that there is an advantage that accurate, quick and smooth transfer sticking can be performed as a whole.
Other advantages of the present invention will become apparent from the description of the following examples.

Schematic which shows the manufacturing process of the protection sheet material concerning this invention. Sectional drawing of the principal part before the process of the protection sheet material concerning this invention. Sectional drawing of the principal part after the process of the protection sheet material concerning this invention. The perspective view which shows 1 process of the usage method of the protection sheet material concerning this invention. The perspective view which shows 1 process of the usage method of the protection sheet material concerning this invention. The side view which shows 1 process of the usage method of the protection sheet material concerning this invention. The side view of 1 process of the usage method of another aspect of the protection sheet material concerning this invention. The side view of 1 process of the usage method of another aspect of the protection sheet material concerning this invention. Sectional drawing of the protection sheet material of a prior art. The expanded sectional view of the principal part of the protection sheet material of a prior art. The schematic front view of the slitter machine of the protection sheet material of a prior art.

In carrying out the method of attaching a protective film on the protective sheet material according to the present invention, it is preferable that a frame line (20A) indicating a specific position of the application target device is printed in addition to the frame line (20).
Thereby, for example, if it is a specific position, that is, a frame line (20A) indicating the opening for the camera lens, it can be positioned more accurately together with the alignment of the periphery of the liquid crystal screen. Transcription can be performed.

As shown in FIG. 2, the protective sheet material 1 according to the present invention is configured as follows.
Since the process for producing the protective sheet material 1 should be a pretreatment process similar to that of the prior art, it is omitted from the illustration. It apply | coats by roll transcription | transfer, and the peeling material 2 is stuck after that. Thus, the long protective sheet material 1 wound in a roll shape is formed in the laminated structure shown in FIG.

Here, the protective film 4 is made of a PET (polyethylene terephthalate) film having a thickness of 50 to 200 microns. Therefore, it has moderate flexibility, is bent when it is bent, and is restored to its original shape when the force is released.
In the present invention, this protective film 4 is not only a PET material film but is not shown in the figure, but in order to have antiglare or self-repairing properties, a soft resin layer of about 30 microns on the base film. It is comprised as a laminated body with (a mixture of silicone and urethane resin). However, in some cases, it may be composed only of a PET material film.

Moreover, the adhesive material 3 is comprised by apply | coating the silicone resin liquid which used the solvent as an adhesive to the said protective film 4 by roll transfer.
Further, in this embodiment, a surface protective film 5 is provided on the other side surface of the protective film 4 (that is, one side surface constituting the surface after sticking). Here, PP (polypropylene) or PET is used. After the protective sheet 1 is transferred and pasted to a screen or the like, it is peeled off and discarded. The surface protective film 5 is not provided for implementation, and the surface of the protective film 4 may be used as it is as the outer surface.

And the said protective sheet material 1 is comprised by sticking the peeling material 2 with a thickness of 50 microns-100 microns to the said protective film 4, Here, PET is used for the base of the peeling material 2 here. Used. In addition, when using PP and other base materials such as paper, etc., if necessary, a release agent such as a silicone film is provided on this one side, that is, the side in contact with the layer of the adhesive 3. Sometimes applied.
A frame line 20 is printed by printing on one surface of the release material 2, here, one surface in contact with the layer of the adhesive material 3. Here, the frame line 20 is a solid line drawn in a frame shape in a size corresponding to the liquid crystal screen of the device to be pasted, and is used for alignment when the protective sheet 1 is placed on the liquid crystal screen. The frame line 20 is preferably a double line with a slight interval, but it may be a single line, a solid line, not a broken line or a two-dot chain line, or simply a corner of a liquid crystal screen. The shape which shows only the part of a part may be sufficient.

A cut 7 is formed in the protective sheet material 1 by the cut forming machine shown in FIG.
When the long protective sheet material 1 is conveyed in the inverted state from the left side of the figure, the protective sheet material 1 is peeled off from the protective film material 4 (adhesive material 3, surface by the guide roll mechanism 10). Once peeled from the coating material 5), it is separated.

  Then, in a state where the release material 2 is separated from the protective sheet 6, the release material 2 is fed onto the ambi roll 10 </ b> A and given a predetermined interval L at a substantially intermediate position in the width direction of the protective sheet material 1. A pair of rotating cutting blades 11 is acted on from the outer surface side of 2, and one piece having a depth D (35 microns) of 90% (99 to 90% is acceptable) of the thickness of the release material 2. Cut 7 (see FIG. 3).

After that, the guide roll mechanism 10 is used to join the protective film 4 again and attach it.
Thereafter, as shown in the middle part of FIG. 1, the protective sheet material 1 is cut into a length or size that is a final shape of the electronic device to be used. In this step, using the punch-shaped blade H, leaving the release material 2 from the protective sheet 1 side, the side edge of the protective sheet 6 is formed so that the knob portion T at the time of peeling is formed. Cut out with a predetermined width, and at the same time, cut the outer dimensions and perforate 8 a window such as the camera position. Of course, the cutting process takes into account variations according to the surface arrangement of the camera of the target device. Accordingly, the cutting includes cutting into a shape corresponding to the shape of the device or its screen (circular, elliptical, square or rectangular with rounded corners, etc.).

The protective sheet material 1 obtained through the manufacturing process described above has the structure shown in the lower part of FIG. 2 and FIG.
As shown in FIG. 4 to FIG. 8, when the protective sheet material 1 in this state is attached to the screen DS of the target device, it is performed as follows, but for the sake of convenience, the state including the previous stage configuration will be described. I will decide.
That is, a layer of the adhesive material 3 is provided on one side surface of the protective film 4 made of a transparent synthetic resin material, the layer of the adhesive material 3 is covered with the release material 2, and in use, the release material 2 is peeled off to It sticks to the liquid crystal screen of a required apparatus for sticking with the adhesive force of the adhesive material 3.

  First, the release material 2 is composed of a flexible and transparent synthetic resin material having flexibility, and a frame line 20 indicating a peripheral frame of a liquid crystal screen of the application target device is printed on one surface thereof, After the release material 2 is covered with the adhesive material 3 layer, a cut 7 having a depth of 90% or more of the thickness of the release material 2 is formed from the outer surface side of the release material 2 at a predetermined position. The release material 2 can be divided and cut at the incisions 7 by the bending operation of the release material 2. FIG. 4 shows the protective sheet 1 cut for a predetermined device to be attached.

  And as shown in FIG. 5, the said frame line 20 is aligned and mounted on the liquid crystal screen of the said sticking object apparatus, and as shown in FIG. 6, the one end side (here lower side) of the said protective sheet 1 is put. In the pressed state, the other end (upper side) is lifted up and curved to divide and cut at the position of the cut 7. By this lifting operation, the release material 2 generates a bursting sound and is divided at the cut portion 7.

By the split cutting, the lifted side cut end 2A lifted from the layer of the adhesive material 3 by the restoring force due to the flexibility of the release material 2 and lifted from the layer of the adhesive material 3 Half of the release material 2 is completely peeled and removed. See FIG.
Next, the part of the protective film 4 from which the release material 2 has been peeled is pressed against the liquid crystal screen and fixed by sticking.
After that, as shown in FIG. 8, this time, the attached protective film 4 is pressed, the end of the protective sheet 1 on the opposite side is held, the whole is lifted upward, and the whole is peeled off. Since the material 2 is slightly lifted from the layer of the adhesive material 3 of the protective film 4 due to its flexibility, the release material (2) remaining by grasping the end 2B is completely peeled off and removed. The remaining part of the protective film (4) is also pressed against the liquid crystal screen.

  The present invention can be properly aligned on a liquid crystal screen using a frame line in which a protective sheet is printed on a release material, and can be accurately attached. The surface of not only a liquid crystal screen but also various devices. Since protection can be achieved, the use is wide and the utility value is high.

1: Protective sheet 2: Release material 3: Adhesive material 4: Protective film 7: Cut 20: Border

The method for applying the protective film in the protective sheet material according to the present invention includes a layer of the adhesive material (3) on one side of the protective film (4) made of a transparent synthetic resin material, and the layer of the adhesive material (3) is provided. The protective sheet material ( 2) is coated with a release material (2), and in use, the release material (2) is peeled off and attached to the liquid crystal screen of the required application target device by the adhesive force of the adhesive material (3). 1)
The release material (2) is composed of a flexible and transparent synthetic resin material having flexibility, and a frame line (20) indicating a peripheral frame of the liquid crystal screen of the application target device is printed on one surface thereof. 90% of the thickness of the release material (2) from the outer surface side of the release material (2) at a predetermined position after the release material (2) is overlaid on the adhesive material (3) layer. The above-mentioned depth of cut (7) is formed, and the release material (2) can be divided and cut at the portion of the cut (7) by an operation of bending the release material (2).
The frame line (20) is positioned and placed on the liquid crystal screen of the device to be pasted, and the notch is formed by lifting and curving the other end while holding one end side of the protective sheet material (1). 7) Split and cut at the position
By the divided cutting, the lifted side cut end (2A) lifted from the layer of the adhesive material (3) by the restoring force due to the flexibility of the release material (2) is gripped and the adhesive material (3 ) And completely remove half of the lifted release material (2) from the layer,
Next, the part of the protective film (4) from which the release material (2) has been peeled off is adhered and fixed to the liquid crystal screen,
After that, this time, by pressing the protective film (4) pasted, grasping the end of the protective sheet material (1) on the opposite side, lifting the whole upward, and curving it, the remaining release material ( 2) is lifted from the layer of the adhesive material (3) of the protective film (4) due to its flexibility, so that the remaining release material (2) is completely peeled by gripping the end (2B). removed, hereinafter, also attached to the LCD screen remainder of the said protective film (4),
It is characterized by that.

Claims (3)

A protective film (4) made of a transparent synthetic resin material is provided with a layer of an adhesive material (3) on one side, and the adhesive material (3) layer is covered with a release material (2). (2) is a protective sheet material that is peeled off and adhered to the liquid crystal screen of the required application target device with the adhesive force of the adhesive material (3),
The release material (2) is composed of a flexible and transparent synthetic resin material having flexibility, and a frame line (20) indicating a peripheral frame of the liquid crystal screen of the application target device is printed on one surface thereof. 90% of the thickness of the release material (2) from the outer surface side of the release material (2) at a predetermined position after the release material (2) is overlaid on the adhesive material (3) layer. The above-mentioned depth of cut (7) is formed, and the release material (2) is configured so that the release material (2) can be divided and cut at the portion of the cut (7) by the bending operation,
The frame line (20) is placed in alignment with the liquid crystal screen of the device to be pasted, and the notch (7) is bent by lifting the other end upward while pressing the one end side of the protective sheet (1). )
By the divided cutting, the lifted side cut end (2A) lifted from the layer of the adhesive material (3) by the restoring force due to the flexibility of the release material (2) is gripped and the adhesive material (3 ) And completely remove half of the lifted release material (2) from the layer,
Next, the part of the protective film (4) from which the release material (2) has been peeled off is adhered and fixed to the liquid crystal screen,
After that, this time, the attached protective film (4) is pressed, the end of the protective sheet (1) on the opposite side is gripped, the whole is lifted upward, and the remaining release material (2 ) Is lifted from the layer of the adhesive material (3) of the protective film (4) due to its flexibility, and the remaining release material (2) is completely peeled and removed by grasping the end (2B). Therefore, the protective film (4) remaining part is also attached to the liquid crystal screen.   The method for applying a protective film on a protective sheet material according to claim 1, wherein in addition to the frame line (20), a frame line (20A) indicating a specific position of the application target device is printed.   The protective sheet material used for the sticking method of the protective film in the protective sheet material of Claim 1 or Claim 2.

Images