JP2000008004A - Tacky tape, its production, tape and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tacky tape having large tensile strength and good hand- cutting property. SOLUTION: This tacky tape is obtained by cutting a vertically monoaxially oriented or vertically biaxially oriented polyolefin, polyester or polyurethane- based tacky film sheet in tape-like shape in vertical direction, and the cut surface of the tacky tape has minutely uneven surface having continuous roundness. It is preferably that the minutely uneven surface having continuous roundness is obtained by cutting the tacky film sheet by using a rotating perforation blade as upper blade and using a rotation roll having sand-like surface as lower blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape and an adhesive tape used for packing and the like, and a method for producing the same.

[0002]

2. Description of the Related Art Currently used adhesive tapes having hand-cutting properties include a PE transversely uniaxially stretched film sheet, a transverse direction of 2 mm.
An adhesive is applied to a shaft polypropylene film sheet, a perforated film sheet, or the like, and cut with a cutter.

[0003]

When these films are heated to a high temperature during production, they have drawbacks in that film elongation, wrinkles and flare occur, and hand cutting is poor. Also,
Since the longitudinal strength is extremely low, there is a disadvantage that film cutting frequently occurs during production processing.

[0004] In order to eliminate these drawbacks, generally, an adhesive film sheet of a polyolefin, polyester, or polyethylene stretched uniaxially or biaxially stretched with a large longitudinal strength, that is, a large tensile strength, is obtained by cutting. It is conceivable to put a V-shaped notch in the obtained adhesive tape, which triggers a hand cut. In this case, the tensile strength of the adhesive tape increases. However, when the tape is rewound, the tear from the V-shaped notch propagates, and the rewound ends. In addition, it may tear off from the V-shaped notch during use.

[0005] In order to make a hand-cutting trigger that does not cause such a cut, it is necessary to make the cut surface when the adhesive film sheet is cut into a tape shape into a continuous rounded fine uneven surface.

[0006] If there is this rounded fine uneven surface, it can be cut by hand using the concave portion as a trigger. At this time,
If the pressure-sensitive adhesive tape is stretched, the hand-cutting property is deteriorated. However, if the above-described film having a large vertical strength is used as the base material of the pressure-sensitive adhesive tape, the hand-cutting property is improved with little elongation.

The present invention has been made under such a technical background, and it is an object of the present invention to provide an adhesive tape having high tensile strength and good hand-cutting properties, a method for manufacturing the same, and a tape and a method for manufacturing the same. Aim.

[0008]

(1) An adhesive tape according to the present invention is obtained by cutting a polyolefin, polyester or polyurethane-based adhesive film sheet stretched uniaxially or biaxially in a longitudinal direction into a tape shape. The adhesive tape obtained in this manner has a cut surface having a continuous rounded fine uneven surface.

The continuous rounded fine irregular surface can be obtained by cutting a pressure-sensitive adhesive film sheet using a rotary perforated blade as an upper blade and a rotating roll with a sandy surface as a lower blade.

The rotation speed ratio between the upper blade and the lower blade is 1: 1.
It is preferably in the range of 1-1: 3.0.

The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is a sandy surface using silica sand of No. 6 to No. 8. Is preferably equivalent to

(2) The method for producing a pressure-sensitive adhesive tape according to the present invention is characterized in that a vertically uniaxially stretched or biaxially stretched polyolefin, polyester, or polyurethane-based pressure-sensitive adhesive film sheet is used as an upper blade with a rotary perforated blade and a lower blade. Using a rotating roll having a sand-like surface, and cutting the tape in the vertical direction.

The rotational speed ratio between the upper blade and the lower blade is 1: 1.
It is preferably in the range of 1-1: 3.0.

The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is a sandy surface using silica sand of No. 4 to No. 8. Is preferably equivalent to

(3) The tape according to the present invention is a tape obtained by cutting a longitudinally uniaxially or biaxially oriented polyolefin, polyester, or polyurethane film sheet into a tape in the longitudinal direction. The cut surface is a continuous rounded fine uneven surface.

[0016] The continuous rounded fine uneven surface can be obtained by cutting a film sheet using a rotary perforated blade as an upper blade and a rotating roll having a sandy surface as a lower blade.

The rotational speed ratio between the upper blade and the lower blade is 1: 1.
It is preferably in the range of 1-1: 3.0.

The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is a sandy surface using silica sand of No. 4 to No. 8. Preferably, it is equivalent to

(4) The method for producing a tape according to the present invention is characterized in that a longitudinally uniaxially or biaxially stretched polyolefin, polyester, or polyurethane film sheet is provided with a rotary perforated blade as an upper blade and sand as a lower blade. The method is characterized in that it is cut into a tape shape in the vertical direction using a rotating roll having a shape surface.

The rotation speed ratio between the upper blade and the lower blade is 1: 1.
It is preferably in the range of 1-1: 3.0.

The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is a sandy surface using silica sand of No. 4 to No. 8. Is preferably equivalent to

[0022]

The pressure-sensitive adhesive tape and tape according to the present invention have a high tensile strength because the above-mentioned film sheet is used as a base material. In addition, since the cut surfaces are rounded minute uneven surfaces, the concave portions serve as triggers for hand-cutting, but do not serve as triggers for tearing when the tape is pulled.

Further, since the adhesive tape and the tape in the present invention are cut using the above-mentioned rotary perforation blade and a rotary roll having a sand-like surface, the cut surface becomes a rounded fine uneven surface. In particular, the rotational speed ratio of both is 1: 1.1 to
In the case of the range of 1: 3.0, since the rotating perforation blade moves on the rotating sheet while pressing the film sheet against the rotating roll, the cut surface is a trigger for hand cutting. , Resulting in a rounded micro uneven surface that does not trigger a tear.

[0024]

Embodiments of the present invention will be described below with reference to embodiments.

The following adhesive film sheet having a large longitudinal strength (width: 600 mm, length: 30 m) was cut by a slitter to obtain an adhesive tape having a width of 15 mm.

(1) Types of adhesive film sheet

[0027]

[Table 1]

(2) Cutting of the adhesive film sheet by the slitter As shown in FIG. 1, the sheet 1 is pulled out from the raw material 2 of the adhesive film sheet 1 of Examples 1 to 4,
Then, it was guided between the upper blade 4 and the lower blade 5, and cut into a tape shape to form an adhesive tape 6.

(3) Combination of upper blade 4 and lower blade 5 used and rotational speed ratio

[0030]

[Table 2]

The adhesive tapes of Examples 1 to 4 and Comparative Examples 1 and 2 were evaluated for hand-cutting properties.

The hand-cutting property was evaluated by pulling out the adhesive tape from the roll tape, pressing the adhesive tape on the roll tape with a finger, and pulling the tip portion in the lateral direction to tear.

[0033]

[Table 3]

Table 4 shows the tearability of the pressure-sensitive adhesive tapes of Examples 1 to 4 and Comparative Examples 1 and 2 when pulled and stretched.

The tear property is determined by using a high-speed roll tape (300
r. p. The evaluation was performed based on the presence or absence of a tear when the film was rewound in m).

[0036]

[Table 4]

Although the above-described example is for an adhesive tape obtained by cutting an adhesive film sheet, almost the same results were obtained in an example of a tape obtained from a film sheet to which no adhesive was applied. .

[0038]

As described above, according to the present invention, since the above-mentioned structure is adopted, it is possible to obtain an adhesive tape and a tape having high tensile strength and good hand-cutting properties.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a slitter for producing an adhesive tape of an embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive film sheet 2 Raw material 3 Guide roller 4 Upper blade 5 Lower blade

Claims (14)

[Claims] A pressure-sensitive adhesive tape obtained by cutting a polyolefin, polyester, or polyurethane-based pressure-sensitive adhesive film sheet that has been stretched uniaxially or biaxially in a longitudinal direction into a tape, wherein the cut surface has a continuous roundness. Adhesive tape characterized by having a fine uneven surface with roughness. 2. The continuous rounded micro-textured surface is obtained by cutting an adhesive film sheet using a rotary perforated blade as an upper blade and a rotating roll with a sandy surface as a lower blade. Item 6. The adhesive tape according to Item 1. 3. The rotation speed ratio between the upper blade and the lower blade is 1: 1.1 to
The pressure-sensitive adhesive tape according to claim 2, wherein the ratio is 1: 3.0. 4. The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is 4/100.
The pressure-sensitive adhesive tape according to claim 2 or 3, which corresponds to a sand-like surface using silica sand of Nos. 1 to 8. 5. An adhesive film sheet of a polyolefin, polyester, or polyurethane stretched uniaxially or biaxially longitudinally, using a rotary perforated blade as an upper blade and a rotary roll having a sandy surface as a lower blade. A method for producing a pressure-sensitive adhesive tape, comprising cutting the tape in a longitudinal direction. 6. The rotation speed ratio of the upper blade to the lower blade is 1: 1.1 to
The method for producing an adhesive tape according to claim 5, wherein the ratio is 1: 3.0. 7. The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is 4/100.
The method for producing a pressure-sensitive adhesive tape according to claim 5 or 6, which corresponds to a sand-like surface using silica sand of Nos. 1 to 8. 8. An adhesive tape obtained by cutting a longitudinally or biaxially stretched polyolefin, polyester, or polyurethane film sheet into a tape in the longitudinal direction, wherein the cut surface has a continuous round shape. A tape characterized by having a certain uneven surface. 9. The continuous rounded fine uneven surface is obtained by cutting a film sheet using a rotary perforated blade as an upper blade and a rotating roll with a sand-like surface as a lower blade. 8. The tape according to 8. 10. The rotation speed ratio between the upper blade and the lower blade is 1: 1.1.
10. The tape according to claim 9, wherein the ratio is １ ： 1: 3.0. 11. The size of the perforation of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is sandy using silica sand of No. 4 to No. 8. 11. The tape according to claim 9, wherein the tape corresponds to a surface. 12. A polyolefin, polyester, or polyurethane film sheet stretched uniaxially or biaxially in a longitudinal direction is rotated by using a rotary perforated blade as an upper blade and a rotating roll having a sandy surface as a lower blade. A method for producing a tape, comprising cutting the tape in a direction. 13. The rotation speed ratio between the upper blade and the lower blade is 1: 1.1.
The method for producing a tape according to claim 12, wherein the ratio is １ ： 1: 3.0. 14. The size of the perforations of the upper blade is 1/100 to 1/600 of the circumference of the upper blade, and the sandy surface of the lower blade is sandy using silica sand of No. 4 to No. 8. 14. The method for producing a tape according to claim 12, wherein the tape corresponds to a surface.