JP2004010854A - Double-sided pressure sensitive adhesive sheet layered product with tab for release and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-sided pressure sensitive adhesive sheet layered product having such a structure that a separator can be easily released from the sheet with one side adhered to an object. <P>SOLUTION: The product 1 has a double-sided pressure sensitive adhesive sheet 3 and a separator 4, laminated in this order on a liner 2 whose upper surface serves as a release surface. A tab 5 for release whose lower surface serves as a nonadhesive surface is attached to an edge portion of the upper surface of the separator through a tape 6 for fixing of the tab. The separator 4 can be easily released from the sheet 3 by turning up and pulling the tab 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a double-sided pressure-sensitive adhesive sheet laminate in which a double-sided pressure-sensitive adhesive sheet used for assembling small mechanical parts such as a key switch substrate of an electronic device is sandwiched between a liner and a separator and punched into a predetermined shape.
[0002]
[Prior art]
When assembling small mechanical parts such as a key switch substrate of a mobile phone, the parts may be fixed or temporarily fixed to each other via a thin double-sided adhesive sheet. This type of double-sided pressure-sensitive adhesive sheet is usually prepared as a three-layer laminate sandwiched between a liner serving as a backing paper and a separator for protecting one side of the pressure-sensitive adhesive surface. This laminated body is first manufactured as a long continuous body, and then supplied to the assembly site of parts and the like in a state where the double-sided pressure-sensitive adhesive sheet and the separator are press-cut into a predetermined shape according to the shape of the substrate or the part. . At the assembly site, the double-sided adhesive sheet is peeled off from the liner one by one together with the separator, and the opened one-sided adhesive surface is attached to a predetermined position of the parts, and then the separator is peeled off, and the other adhesive surface is attached to the other side. It is generally used in a procedure of attaching parts.
[0003]
[Problems to be solved by the invention]
In the process of assembling the components as described above, one side adhesive surface of the double-sided adhesive sheet is attached to a predetermined position of the components, and then when the separator laminated on the opposite adhesive surface is to be peeled, the separator Is often difficult to peel off. This is because the double-sided pressure-sensitive adhesive sheet and the separator are press-cut at the same time, so that there is no finger catch that can turn off only the separator. Such a problem is particularly remarkable when the thickness of the double-sided pressure-sensitive adhesive sheet is small, and causes a reduction in work efficiency and disturbed adhesion state such as peeling and wrinkling of the double-sided pressure-sensitive adhesive sheet.
[0004]
Therefore, an object of the present invention is to provide a double-sided pressure-sensitive adhesive sheet laminate having a configuration in which a separator can be easily peeled off from a double-sided pressure-sensitive adhesive sheet having a single-sided adhesive surface adhered to an object, and a method for producing the same. .
[0005]
[Means for Solving the Problems]
The tabbed double-sided pressure-sensitive adhesive sheet laminate of the present invention has a double-sided pressure-sensitive adhesive sheet having a pressure-sensitive adhesive surface on both sides of a liner having a release surface on the upper surface, a release surface on the lower surface, and a non-release surface on the upper surface. And a separator having a lower surface formed of a non-adhesive surface is attached to one edge of the upper surface of the separator via a tab fixing tape having a lower surface formed of an adhesive surface. It is characterized by having.
[0006]
That is, in the present invention, a release tab is attached to one edge of the upper surface of the separator (the side opposite to the surface in contact with the double-sided pressure-sensitive adhesive sheet). The release tab has a non-adhesive surface whose lower surface (surface facing the separator) does not adhere to the separator, and is attached to one edge of the separator via a tab fixing tape. By pulling the release tab, only the separator can be easily peeled off from the double-sided pressure-sensitive adhesive sheet adhered to the object.
[0007]
In the present invention, the tab fixing tape and the release tab are preferably press-cut according to the outer shapes of the double-sided pressure-sensitive adhesive sheet and the separator. According to this configuration, the tab fixing tape and the release tab do not protrude outside the outer shape of the double-sided pressure-sensitive adhesive sheet. And the release tab do not interfere with positioning. Therefore, the work of attaching the double-sided pressure-sensitive adhesive sheet can be performed accurately and easily.
[0008]
Further, the production method of the tabbed double-sided pressure-sensitive adhesive sheet laminate of the present invention, on the liner continuum upper surface is a release surface, a double-sided pressure-sensitive adhesive sheet continuity on both surfaces are adhesive surfaces, the lower surface A release surface, a separator continuous body whose upper surface is made a non-release surface is laminated, and then, a lower surface is a non-adhesive surface, and a release tab continuous body whose upper surface is made a non-release surface is a separator continuous body. Laminated on the upper surface of the separator continuum so as not to cover one edge portion, and further, a tab fixing tape continuum whose lower surface is an adhesive surface is separated from the edge of the separator continuity by the release tab. After laminating so as to cover the range up to the upper surface of the continuum, each continuum other than the liner continuum is press-cut into a predetermined shape by a die for contour punching, thereby forming a tab on one edge of the separator. Release tape via fixing tape There wherein the obtaining adhered to double-sided pressure-sensitive adhesive sheet laminate.
[0009]
According to this manufacturing method, a releasing tab is provided between a step of manufacturing a three-layer continuous laminated body by stacking a continuous liner, a double-sided pressure-sensitive adhesive sheet, and a continuous separator, and a step of press-cutting them. By simply adding the step of laminating the continuous body and the tab fixing tape continuous body, the double-sided pressure-sensitive adhesive sheet laminate with the releasing tab can be easily and inexpensively manufactured without particularly large capital investment.
[0010]
In addition, in this specification, the "adhesive surface" refers to a surface on which an adhesive is applied or spread over the entire surface of the material, and is treated so as to be able to adhere to a counterpart by its adhesive force. However, if the surface of the other party is a "release surface", they can be separated again without damaging each other's surfaces, while if the other surface is a "non-release surface", Adhesive strength that cannot be easily peeled off due to close contact is obtained. Furthermore, the "release surface" refers to a surface that has been treated by a resin coating or the like so that the adhesive surface is easily peeled off, and the "non-release surface" is not subjected to such treatment, and is applied to the adhesive surface of the other party. A surface that does not easily peel off when it comes into close contact. The “non-adhesive surface” refers to a surface including the “release surface” and the “non-release surface”.
[0011]
Further, in this specification, for the sake of convenience, the positional relationship between the surfaces of the laminated materials is described with reference to a certain vertical direction, but such a vertical relationship is only a relative one, and It does not strictly define the hierarchical relationship in the above.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIGS. 1 and 2 are views showing a configuration of a double-sided pressure-sensitive adhesive sheet laminate 1 with a release tab according to an embodiment of the present invention, and illustrate a shape used for assembling a switch substrate of a mobile phone. .
[0014]
The double-sided pressure-sensitive adhesive sheet laminate 1 with a release tab comprises five layers of a liner 2, a double-sided pressure-sensitive adhesive sheet 3, a separator 4, a release tab 5, and a tab fixing tape 6, in this order from the bottom in the figure. Have been.
[0015]
The liner 2 is a sheet made of paper or resin whose upper surface has been release-treated. The liner 2 is prepared as a long continuous liner 20 extending in the direction shown in FIG. 1 in the manufacturing stage, and is cut into appropriate dimensions as needed in the use stage.
[0016]
The double-sided pressure-sensitive adhesive sheet 3 is formed by uniformly applying a pressure-sensitive adhesive on both sides of a flexible thin base material, or by spreading the pressure-sensitive adhesive itself in a thin sheet shape. Is adhered to the upper surface (release surface) of the liner 2.
[0017]
The separator 4 is a sheet made of paper or resin whose lower surface is release-treated, and the lower surface (release surface) is adhered to the upper surface (adhesive surface) of the double-sided adhesive sheet 3. The upper surface of the separator 4 is a non-release surface.
[0018]
The release tab 5 is a strip having a width smaller than the three layers, that is, the liner 2, the double-sided pressure-sensitive adhesive sheet 3, and the separator 4. The release tab 5 has a lower surface that is a non-adhesive surface and an upper surface that is a non-release surface, and a lower surface (non-adhesive surface) that is stacked near one edge of the separator 4. However, between the release tab 5 and the separator Kataen of 4, slight deviation width W ₁ is provided.
[0019]
The tab fixing tape 6 is a flexible band-shaped body slightly wider than the release tab 5, and has a lower surface having an adhesive surface and an upper surface having a non-adhesive surface. The tab fixing tape 6 has a lower surface (adhesive surface) that substantially overlaps with the release tab 5 and the gap width provided between the release tab 5 and one edge of the separator 4. so as to be overlapped in W _1, it is bonded to the upper surface of the release tab 5 (non-release surface) and the top surface of the separator 4 (the non-release surface).
[0020]
That is, most of the tab fixing tape 6 is attached to the release tab 5 and part of the tab fixing tape 6 is attached to the separator 4, and serves to join the separator 4 and the release tab 5. Play. Since the upper surface of the separator 4 and the lower surface of the release tab 5 are both non-adhesive surfaces, the release tab 5 is attached to the separator 4 via the tab fixing tape 6 as shown in FIG. You can flip up the other side of.
[0021]
The four layers except the liner 2, which is the lowermost layer, of these five layers are press-cut to the same outer shape in accordance with the shape of the object. Further, a circular hole 71 for positioning, a window hole 72 for mounting components, and the like are punched through the laminate so as to penetrate five layers including the liner 2.
[0022]
When using such a five-layered double-sided pressure-sensitive adhesive sheet laminate 1 having a release tab, first, a four-layered double-sided pressure-sensitive adhesive sheet 3, a separator 4, a release tab 5, and a tab fixing tape 6 are formed. The laminate is peeled off from the liner 2, and the lower surface of the double-sided PSA sheet 3 is adhered to the surface of the object. Next, the separator 4 is peeled off from the upper surface of the double-sided pressure-sensitive adhesive sheet 3. At this time, the release tab 5 is turned up as shown in FIG. 2 and pulled upward together with the tab fixing tape 6. Then, as shown in FIG. 3, the separator 4 is gradually turned up from one edge portion on the right side in the figure, and is separated from the double-sided pressure-sensitive adhesive sheet 3.
[0023]
As described above, by pulling the release tab 5 bonded to one edge of the separator 4 via the tab fixing tape 6, the double-sided pressure-sensitive adhesive sheet 3 stuck to the object 8 can be easily touched. The separator 4 can be peeled off. Therefore, the edge of the double-sided pressure-sensitive adhesive sheet 3 once adhered to the object 8 is not peeled off again, and the adhered state is not disturbed such as wrinkles. it can.
[0024]
4 to 7 are views showing a method of manufacturing the above-described double-sided PSA sheet laminate 1 with tabs for release in the order of steps. In each of these figures, (a) is a top view and (b) is a side view. Also, in FIG. 5A, the feed direction of the process is rightward, and in FIG. 5B, the right side is downward.
[0025]
In manufacturing the double-sided pressure-sensitive adhesive sheet laminate 1 with a release tab, first, as shown in FIG. 4, a long continuous liner 20, a double-sided pressure-sensitive adhesive sheet continuous body 30, and a continuous separator body 40 are prepared. Are sequentially fed out to produce a three-layer continuous laminate. It is preferable that all the layers constituting the three-layer continuous laminate are all equal in width or only the liner continuous body 20 is slightly wider than the other two layers.
[0026]
Next, as shown in FIG. 5, a long continuous strip of release tab 50 having a width smaller than the three layers is stacked on the upper surface (non-release surface) of the continuous separator 40. At this time, to secure a certain shift width W ₂ between the release tabs continuum 50 and Kataen portion of the separator continuum 40, the release tab continuum 50 Kataen portion of the separator continuum 40 Not to cover.
[0027]
Furthermore, a long tab fixing tape continuous body 60 slightly wider than the release tab continuous body 50 is covered over a range from one edge of the separator continuous body 40 to the upper surface of the release tab continuous body 50. Are laminated as described above. As a result, a continuous laminate of five layers is obtained in which the continuous tab for release 50 is joined to one edge of the continuous separator 40 via the continuous tab fixing tape 60.
[0028]
Next, as shown in FIG. 6, four layers except for the lowermost layer liner continuum 20 of the five-layer continuous laminate are press-cut from above using a die for contour punching. During this press cut, within been a shift width W ₂ secured between the release tabs continuum 50 and Kataen portion of the separator continuum 40 is so such a portion of cut line. Before and after this, a positioning round hole 71 and a component mounting window hole 72 penetrating the five-layer continuous laminate are punched out.
[0029]
Next, as shown in FIG. 7, the unnecessary portions of the four layers cut by the press are collectively peeled off from the continuous liner 20. Since this unnecessary portion is connected in the feed direction, it can be continuously removed. Then, if the liner continuous body 20 is cut into an appropriate size, the double-sided pressure-sensitive adhesive sheet laminate 1 with a release tab shown in FIG. 1 is completed.
[0030]
In this manufacturing method, the manufacturing process of a three-layer continuous laminate in which the continuous double-sided pressure-sensitive adhesive sheet 30 is sandwiched between the liner continuous body 20 and the separator continuous body 40 has been conventionally performed. Can be used as it is. In addition, the step of press-cutting each layer except for the liner continuum 20 into a predetermined shape and the step of making a hole penetrating all the layers can also use conventional general manufacturing steps. Therefore, the double-sided pressure-sensitive adhesive sheet laminate 1 with a releasing tab of the present invention has a particularly large facility only by adding the step of laminating the continuous releasing tab 50 and the continuous tape fixing tab 60 to the conventional manufacturing process. It can be manufactured inexpensively and easily without investment.
[0031]
Moreover, the newly added two layers of the release tab continuum 50 and the tab fixing tape continuum 60 are press cut together with the double-sided pressure-sensitive adhesive sheet continuum 30 and the separator continuum 40. Accordingly, the release tab 5 and the tab fixing tape 6 do not protrude outside the outer shape of the double-sided pressure-sensitive adhesive sheet 3, and do not hinder positioning or the like when the double-sided pressure-sensitive adhesive sheet 3 is attached. Thereby, the work of attaching the double-sided pressure-sensitive adhesive sheet 3 can be performed accurately and easily.
[0032]
【The invention's effect】
In the double-sided pressure-sensitive adhesive sheet laminate with a release tab of the present invention, a release tab is attached to one edge of the upper surface of the separator (the side opposite to the surface in contact with the double-sided pressure-sensitive adhesive sheet) via a tab fixing tape. Therefore, when the release tab is turned up and pulled, only the separator can be easily peeled off from the double-sided pressure-sensitive adhesive sheet adhered to the object. Thereby, work efficiency in assembling parts and the like using the double-sided pressure-sensitive adhesive sheet can be improved.
[0033]
Furthermore, in this double-sided pressure-sensitive adhesive sheet laminate with a release tab, the positioning of the double-sided pressure-sensitive adhesive sheet and the like can be performed by press-cutting the tab fixing tape and the release tab according to the external shape of the double-sided pressure-sensitive adhesive sheet and the separator. It can be done accurately and easily.
[0034]
Further, according to the method for producing a double-sided pressure-sensitive adhesive sheet laminate with a release tab of the present invention, without particularly large capital investment, the double-sided pressure-sensitive adhesive sheet laminate with a release tab in a reasonable and inexpensive process. , Can be easily manufactured.
[Brief description of the drawings]
FIG. 1 is a perspective view of a double-sided pressure-sensitive adhesive sheet laminate with a release tab according to an embodiment of the present invention.
FIG. 2 is a side view of the tabbed double-sided pressure-sensitive adhesive sheet laminate.
FIG. 3 is a side view showing a use state of the double-sided pressure-sensitive adhesive sheet laminate with a release tab.
FIG. 4 is an explanatory view showing a first step in the method for producing a double-sided pressure-sensitive adhesive sheet laminate with a release tab.
FIG. 5 is an explanatory diagram showing a second step in the method for producing a double-sided pressure-sensitive adhesive sheet laminate with a release tab.
FIG. 6 is an explanatory view showing a third step in the method for producing a double-sided pressure-sensitive adhesive sheet laminate with a release tab.
FIG. 7 is an explanatory diagram showing a fourth step in the method for producing a double-sided pressure-sensitive adhesive sheet laminate with a release tab.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Double-sided adhesive sheet laminate with release tab 2 Liner 20 Liner continuous body 3 Double-sided adhesive sheet 30 Double-sided adhesive sheet continuous body 4 Separator 40 Separator continuous body 5 Release tab 50 Release tab continuous body 6 Tab fixing tape 60 Tab continuous tape

Claims (3)

On a liner whose upper surface is a release surface, a double-sided adhesive sheet whose both surfaces are an adhesive surface, a lower surface is a release surface, and a separator whose upper surface is a non-release surface are laminated,
A release tab, wherein a release tab whose lower surface is non-adhesive is attached to one edge of the upper surface of the separator via a tab fixing tape whose lower surface is adhesive. With double-sided adhesive sheet laminate. 2. The double-sided PSA sheet with a release tab according to claim 1, wherein the tab fixing tape and the release tab are press-cut according to the outer shape of the double-sided PSA sheet and the separator. 3. On the liner continuum whose upper surface has been made a release surface, a double-sided pressure-sensitive adhesive sheet continuum whose both surfaces have been made an adhesive surface, and a separator continuum whose lower surface has a release surface, the upper surface has been made a non-release surface,
Next, the lower surface is a non-adhesive surface, the release tab continuum whose upper surface is a non-release surface, laminated on the upper surface of the separator continuum so as not to cover one edge of the separator continuity,
Further, after laminating a continuous tab-fixing tape having an adhesive surface on the lower surface so as to cover a range from one edge portion of the continuous separator to the upper surface of the releasing tab-continuous body,
By pressing each continuum other than the liner continuum into a predetermined shape with a die for contour punching, a double-sided adhesive having a release tab attached to one edge of the separator via a tab fixing tape. A method for producing a double-sided pressure-sensitive adhesive sheet laminate with a tab for release, comprising obtaining a sheet laminate.

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