JPH0326773A - Adhesive tape having cross-cutting property - Google Patents

Abstract

PURPOSE:To obtain the subject tape having excellent cross-cutting property by providing heat-deteriorated part in transverse direction with constant intervals in flow direction of adhesive tape. CONSTITUTION:A synthetic resin laminated layer 2 and releasing agent layer 3 are provided on one surface of a substrate 1 and self-adhesive layer 4 is provided on the other face to form an adhesive tape. Then, heat-deteriorated parts are provided in said substrate or both the substrate and the laminated layer on the surface of the rolled adhesive tape at suitable intervals by a hot roll having stripe-like protrusion in almost perpendicular to rotating direction of the rolled tape to afford the aimed adhesive tape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel adhesive tape, and more particularly to an adhesive tape with cross-cutting properties. (Prior art and problems) Adhesive tapes in general use today generally have a structure in which a polyethylene laminate layer and a release agent layer are provided on one side of the base material, and an adhesive layer is provided on the other side. ．． Adhesive tapes with this structure are used by pulling out the tape tip from a roll of tape, pasting it on a predetermined location, and then tearing it horizontally by hand. The cutting direction is not constant, and the cut ends on the adhesive tape side and the rolled tape side are completely irregular and have an extremely poor appearance. If you use scissors or a cutter instead of cutting by hand, you will get a clean cut, but using scissors is cumbersome and inevitably reduces work efficiency. In an attempt to solve this problem, a method has been used in which minions are carved at regular intervals, but the unevenness of the perforations not only deteriorates the shape of the roll, but also increases the equipment cost. On the other hand, there is a method of laminating a uniaxially stretched film (horizontally stretched film) to a paper base material to impart cross-cutting properties, but if the adhesiveness of the laminating agent is poor, either the film or the paper base material may break. However, the other side may remain uncut, or curling may easily occur, and furthermore, there are problems in terms of cost.

[Means for solving problems]

In view of these circumstances, the inventor of the present invention has conducted extensive research to solve the above problems, and has found that the adhesive tape is given strength by providing heat-degraded parts in the transverse direction at regular intervals in the flow direction (vertical direction). We found that the above purpose was achieved by
The invention has been perfected. That is, the first aspect of the present invention is an adhesive tape in which a resin laminate layer and a release agent layer are provided on one side of a base material, and an adhesive layer is provided on the other side, and the roll surface is provided with appropriate intervals. is placed, and a heated roll with striped protrusions protruding in a direction approximately perpendicular to the direction of rotation is used to
A second aspect of the present invention provides an adhesive tape with cross-cutting properties, characterized in that a thermally degraded portion is provided on the base material or the base material and the ladanate layer. In the adhesive tape, heat-degraded portions are provided on the base material or the base material and the printed layer using a heat roll having streak-like protrusions projecting approximately perpendicular to the rotation direction of the roll surface at appropriate intervals. Each of these is an adhesive tape with cross-cutting characteristics. In the present invention, the adhesive tape includes roll-shaped and sheet-shaped adhesive tapes used for cleaning carpets, clothes, and the like.

The present invention will be explained based on the drawings.

FIG. 1 shows implementation B of the present invention, in which the thermally degraded part (1a)
On the base material (1) provided with
2), further provided with a release agent layer (3), while
An adhesive layer (4) is provided on the other surface of the base material (1). As the base material (1) used in the present invention, materials such as kraft paper, crepe paper, crupank paper, high quality paper, Japanese paper, etc. are suitable, but cloths such as cotton, stapler, vinylon cloth, PET cloth, etc. are suitable. It can also be applied to base materials that can be cut by hand, such as PP cloth. The base material preferably has a weight of about 20 to 120 g/m. The heat-degraded part (l a) is formed by using a heat roll having streaky protrusions projecting at appropriate intervals in a direction substantially perpendicular to the rotation direction of the roll, and passing between the heat roll and a press roll. can get. The height of the striations is 0.1-5.
Practically speaking, it is preferable to provide the tubes with a width of 1 m and a width of 1 to 5 m at intervals of 2 to 50 m.

The streaks may be regular or irregular.

As the resin laminate layer (2) used in the present invention, conventionally known polyethylene, polypropylene, etc., and mixtures thereof with modified polyolefin resins and modified silicone resins are used. Of course, it is also possible to use materials containing organic and inorganic additives such as fillers. The thickness of the lagonate layer is preferably about 7 to 45 μm.

The release agent layer (3) and adhesive layer (4) used in the present invention are not particularly limited, and include, for example, silicone resin, long-chain alkyl carbamate, long-chain alkylamide, and copolymerization of these with the second precept. Examples include known release agents such as rubber-based, acrylic-based, vinyl ether-based, and hot-melt adhesives.

The coating amount of the release agent is preferably about 0.5 to 1.2 g/rd, and the coating amount of the adhesive is preferably about 20 to 100 g/rd.
FIG. 2 shows another implementation of the present invention! In the adhesive tape shown in FIG. 1, the resin laminate layer (2)
A thermally degraded portion (2a) reaching the base material (1) is provided at the base material (1). In this case, the resin laminate layer (2) can be easily provided on the base material (1) by extrusion lamination and then passed between a heat roll and a press roll having the above structure.

FIGS. 3 and 4 respectively show further embodiments B of the present invention.
In Figure 3, the base material (1) and the release agent N (3
), and the printed layer (5) is provided with a heat-degraded portion (5a) that reaches the base material (1), and in FIG. A printing layer (5) is provided between the base material (
A thermally degraded portion (5a) reaching 1) is provided.

Although typical embodiments of the present invention have been shown above, the present invention is not limited to these. For example, in the adhesive tape shown in FIG. Many variations are possible, such as providing a laminate layer of Of course, it is included in inventions. In addition, for example, by applying a substance that colors the base material at the same time as thermal deterioration, or using a resin that colors the thermally deteriorated part,
In other words, it is preferable for Mr. B to make the location of the cut on the hand clearly visible.

Furthermore, it is also possible to treat the heat-degraded portion with a chemical that further accelerates deterioration, such as an aqueous solution of acid, alkali, or salt, or an organic chemical solution, by attaching it to the streaky protrusions. [Example] Below, The present invention will be explained in more detail with reference to examples.
The present invention is not limited to these in any way.

Example 1 As shown in FIG.
73g/rrf) On one side of (1), low density polyethylene "Mirason M16SPJ (manufactured by Mitsui Petrochemical Industries) was extruded and laminated at a die temperature of 340°C to a thickness of 1
A laminate layer (2) of 5 μm was provided.

On top of this, apply silicone remover Ji (rSD-72) using a conventional method.
23J, manufactured by Toray Silicone) (3) at 0.5 g/rt
12 setting, curing for 140'CX1 minutes, 20℃×
Aged for 24 hours. Next, the kraft paper side of this laminate was placed at a height of 0. 2 m,
Width 1. The material was passed between a press roll at 20 m/min so as to be in contact with a heat roll (surface temperature 160°C) having 5 m long protrusions arranged at 10 m intervals and a heat roll (surface temperature 160°C).
Heat-deteriorated areas (streaks) (l
a) was given. 48g/po of the rubber-based adhesive "Olivine BPS-2411J (manufactured by Toyo Ink) (4)" was applied by a conventional method on the surface of the kraft paper provided with the heat-degraded area, and dried at 70°C for 3 minutes. The resulting adhesive tape had a good winding shape without deforming, and was easy to cut by hand in the lateral direction without using a cutter during use.

[Action/Effect]

As described above, according to the present invention, it is possible to provide an adhesive tape that has a good winding form and is excellent in manual tearability in the lateral direction.

[Brief explanation of drawings]

FIGS. 1 to 4 each illustrate an embodiment of the present invention and are schematic cross-sectional views in the longitudinal (vertical) direction. 1... Base material 2... Lamination uneven layer 3... Release agent layer 4... Adhesive layer 5... Printed layers 1a, 2a, 5a... Heat degraded part

Claims (1)

[Claims] 1. In an adhesive tape comprising a synthetic resin laminate layer and a release agent layer on one side of a base material, and an adhesive layer on the other side, the roll surface is provided with an appropriate interval. An adhesive having cross-cutting properties, characterized in that a heat-degraded portion is provided on the base material or the base material and the laminate layer by a heat roll having streak-like protrusions projecting in a direction substantially perpendicular to the direction of rotation of the adhesive. tape. 2. In an adhesive tape having a printed layer on the surface of a base material, using a hot roll having striped protrusions projecting at appropriate intervals on the roll surface in a direction approximately perpendicular to the direction of rotation of the roll,
An adhesive tape with cross-cutting properties, characterized in that a thermally degraded portion is provided on the base material or the base material and the printed layer. 3. The adhesive tape according to claim 1 or 2, further comprising a chemical that promotes deterioration attached to the heat-degraded portion.