JP3053691B2 - Surface treatment method and apparatus for adhesive tape or sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a surface of an adhesive tape or sheet in which an adhesive layer is laminated on one side of a base layer made of a polyolefin resin, and more particularly, to a method for forming a wound body. The present invention relates to a method and an apparatus for processing a surface of a pressure-sensitive adhesive tape or sheet having good reversibility (developing force).

[0002]

2. Description of the Related Art As a product form such as a pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer is laminated on one side of a base layer made of a polyolefin resin, a wound body obtained by winding these into a coil shape is generally used. In this roll of pressure-sensitive adhesive sheet or the like, the pressure-sensitive adhesive layer such as the outer pressure-sensitive adhesive sheet and the back surface of the inner substrate are in close contact with a relatively strong adhesive force. When rewinding, it is difficult to peel off. For this reason, so-called release processing is usually performed on the back surface of the base material so that it can be easily unwound. As the release treatment, a method of applying a release agent on the back surface of the base material in advance is conventionally performed.

[0003]

However, in such a mold release treatment method, the material cost is increased by the amount of the mold release agent, and a complicated mold release agent coating step is required. Further, even in the obtained pressure-sensitive adhesive sheet roll, there is a quality problem that the release agent migrates to the pressure-sensitive adhesive layer and causes a decrease in the adhesive strength.

Further, without using such a mold release agent, a shear force is applied to the surface of the base material made of polyolefin resin by causing sliding friction due to contact with a solid substance to give the surface a surface treatment. The present applicant has applied for a surface processing method for improving the unwinding property (developing force) of a wound body such as an adhesive sheet. (1991 Patent Application No. 104430)
As this solid substance, a roll-shaped substance is generally used. The above surface processing method is very preferable because the unwinding property (developing force) of a wound body such as an adhesive sheet is improved without using a release agent. When surface-treating adhesive sheets with various widths and narrow widths, the solid material that does not come into contact with the adhesive sheet etc. comes into contact with the other roll supporting the adhesive sheet etc. There is a problem such as damaging.
For this reason, there has been a problem that an integrated wide roll-shaped solid substance cannot be applied to an adhesive sheet having various widths.

SUMMARY OF THE INVENTION In view of the above, the present invention provides an adhesive which can improve the rewinding property of a wound body such as an adhesive sheet and use a arbitrarily set surface processing width without using a release agent. An object of the present invention is to provide a method and an apparatus for processing a surface of a tape or a sheet.

[0006]

The surface treatment method of the pressure-sensitive adhesive tape or sheet according to the present invention is directed to a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer laminated on one side of a base layer made of a polyolefin resin via an intermediate layer if desired. The back surface of the base material layer of the sheet is brought into contact with a combined columnar body composed of a plurality of narrow solid materials, causing sliding friction between the base material and the solid material, and shearing the back surface of the base material layer. It is characterized by giving power.

The surface treatment apparatus for a pressure-sensitive adhesive tape or sheet according to the present invention comprises a substrate layer of a pressure-sensitive adhesive tape or sheet in which a pressure-sensitive adhesive layer is laminated on one side of a base layer made of a polyolefin resin via an intermediate layer if desired. A support roll for supporting the surface of the pressure-sensitive adhesive layer, and a surface processing apparatus for a pressure-sensitive adhesive tape or sheet comprising a solid substance that applies a shearing force to the back surface of the base material layer on the support roll, wherein the solid substance has a small width. It is characterized in that it is composed of a combination of solid substances and the narrow solid substance is slidable on its support shaft.

[0008] The material of the solid substance is not particularly limited. For example, a material in which a fiber or fiber molded body such as gauze or cloth is wound around a metal roll, paper, rubber,
It is made of a laminate of surface layers made of a synthetic resin, stainless steel or a metal whose surface is plated, and has a coefficient of sliding friction between the surface layer of the solid substance and the base material layer of the polyolefin resin of 0.1. And those of 3 to 0.9.

[0009] The shape of the solid substance does not necessarily have to be a cylindrical shape, and when used in a fixed state, it may be a base of an adhesive tape or sheet (hereinafter abbreviated as an adhesive sheet) such as a semi-cylindrical shape. Any shape may be used as long as there is no protrusion or the like at the portion where the back surface of the material comes into contact, and the material can slide.

The width of the small solid material is, for example, 3
In the case of a roll-shaped solid material of 00 mm, its width should be 10
It is desirable to set it to about 0 mm from the viewpoint of workability and the like.

The combination of the solid substances having a small width may be a combination of those having the same width or a combination having different widths.

[0012]

The combination of solid substances having a small width makes it possible to produce a combination of solid substances having a required width according to the width of the pressure-sensitive adhesive sheet to be surface-processed. As a result, the solid material having a width necessary for the pressure-sensitive adhesive sheet to be surface-treated is brought into contact with the back surface of the base material layer of the pressure-sensitive adhesive sheet on which the pressure-sensitive adhesive layer is laminated, and a sliding friction is generated between the base material and the solid material. A shear force can be applied to the back surface of the material layer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a side view of one embodiment of the surface treating apparatus for an adhesive tape or sheet of the present invention. Reference numeral 1 denotes a gantry, and a shaft 2 is mounted on the gantry 1, and an arm 3 is mounted so as to be rotatable around the shaft 2, and a baffle 4 (winding a fiber molded body of a metal roll) Attached) is attached. The baffle 4 is rotated in the reverse direction.
Can be pulled up to the position. Reference numeral 6 denotes a support roll which is rotated in the opposite direction to the baffle 4. Reference numeral 7 denotes an adhesive sheet in which an adhesive layer is formed on one surface of a substrate made of a polyolefin resin film, and the direction of the arrow (upper surface) indicates the back surface of the substrate. 8 and 9 are adhesive sheets 7
This is a roll for applying tension to the roller.

FIG. 2 is a front view of one embodiment of a solid substance which can be used in the apparatus for processing the surface of an adhesive tape of the present invention. FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. 4 is a front view showing a state in which the combination of the narrow solid substances is changed. Reference numeral 10 denotes a small-width roll-shaped buff collar, and a plurality of (eight in this example) buff collars 10 are combined to form the above-mentioned buff roll 4. A keyway for the key 11 is provided on the inner periphery of the buff collar 10. Reference numeral 12 denotes a support shaft on which the buff collar 10 is mounted, and a key groove for the key 11 is provided on the outer periphery thereof. Reference numeral 13 denotes an easily removable detachable collar that can fix the buff collar 10 at an arbitrary position on the support shaft 12.

The baffle 4 is assembled as follows. First, the key 11 is fitted into the key groove of the support shaft 12, and then the key grooves of a plurality of (in this case, eight) buff collars 10 are fitted into the key 11. Buff color 10 is key 11
Is slidable on the support shaft 12 with the guide as a guide. The number of the buff collars 10 to be fitted into the keys 11 is desirably the number corresponding to the maximum width of the pressure-sensitive adhesive sheet 7 to be surface-processed from the viewpoint of workability and the like.

Next, the number of buff collars 10 (for example, FIG. 1) is set so as to be equal to the surface processing width of the pressure-sensitive adhesive sheet 7 to be processed.
In the example of (1), eight (3 in the example of FIG. 4) are determined, and both ends thereof are fixed with separate collars 13. Since the separate collar 13 can be of a detachable type, it can be easily fixed. When all the buff collars 10 are not used as shown in FIG. 4, the extra buff collars 10 are moved to both ends of the support shaft 12 not in contact with the mating drive roll 6, and fixed with the separate collars 13 so as not to move as described above. Keep it. When the surface processing width of the pressure-sensitive adhesive sheet 7 to be processed is different, the number of the buff collars 10 is appropriately selected according to the surface processing width of the pressure-sensitive adhesive sheet 7, and both ends of the selected number of the buff collars 10 are separated by the separate color 1.
Fix with 3.

The surface processing of the adhesive sheet 7 is performed as follows. As described above, a plurality of buff collars 10 are combined in accordance with the width of the pressure-sensitive adhesive sheet 7 to be surface-processed to form the baffle 4, and then the pressure-sensitive adhesive sheet 7 sent from the previous process is tensioned by the roll 9 to provide a baffle. A shearing force is applied to the back surface of the base material layer of the pressure-sensitive adhesive sheet 7 through the space between the support roll 4 and the support roll 6 to perform surface processing. The surface-treated pressure-sensitive adhesive sheet 7 is sent to the next step via a roll 8 to form a wound body.

[0018]

According to the present invention, the surface processing width can be arbitrarily set by the combination of the narrow solid substances, and the solid substance having a width required for the pressure-sensitive adhesive sheet to be subjected to the surface processing is replaced by the base material of the pressure-sensitive adhesive sheet on which the pressure-sensitive adhesive layer is laminated. It can be brought into contact with the back side of the material layer, causing a sliding friction between the base material and the solid substance to give a shearing force to the back side of the base material layer. The unwinding property of the heavy body can be improved, and the surface processing of the pressure-sensitive adhesive sheet having various widths can be performed without causing any damage to the roll.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a surface processing apparatus for a pressure-sensitive adhesive sheet of the present invention.

FIG. 2 is a front view of an embodiment of a solid substance that can be used in the pressure-sensitive adhesive sheet surface processing apparatus of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a front view showing a state when a combination of narrow solid substances is changed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base 2 axis 3 arm 4 baffle 6 support roll 7 adhesive sheet 8 roll 9 roll 10 buff collar 11 key 12 support shaft 13 separate color

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C09J 7/02 B32B 27/32

Claims (2)

(57) [Claims] 1. A plurality of narrow solid substances are provided on one side of a base layer made of a polyolefin resin, on the back side of a base layer of a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer laminated via an intermediate layer, if desired. Contact the combined columnar body,
A surface treatment method for a pressure-sensitive adhesive tape or sheet, wherein sliding friction is generated between a substrate and a solid substance to apply a shearing force to the back surface of the substrate layer. 2. A support roll for supporting the pressure-sensitive adhesive layer surface of a base layer of a pressure-sensitive adhesive tape or sheet in which a pressure-sensitive adhesive layer is laminated on one side of a base layer made of a polyolefin resin via an intermediate layer if desired. An apparatus for surface-treating an adhesive tape or sheet comprising a solid material that gives a shearing force to the back surface of a base material layer on a support roll, wherein the solid material is a combination of narrow solid material columnar bodies, and An apparatus for processing a surface of an adhesive tape or sheet, wherein a solid substance is slidable on a support shaft thereof.