JP2001139899A - Line tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a line tape which has good colorability and hiding power, a suitable stretchability, strength higher than peeling force, and a good hand- tearability and can be easily disposed of after the use. SOLUTION: This line tape is prepared by forming a pressure-sensitive adhesive layer on one side of a substrate film (I) which is a polyolefin resin film containing a coloring pigment and having grooves formed on at least one side thereof and almost perpendicularly to the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line tape, and more particularly, to a line tape used for line drawing which is affixed for the purpose of separating or displaying the ground, a road surface, a building floor, or the like, and which is peeled off after use.

[0002]

2. Description of the Related Art Conventionally, an OP has been used as a line tape.
A P film or a vinyl chloride resin (PVC) film is used as a base material, and an adhesive layer is provided on one surface of the base material. The OPP film and the PVC film have excellent coloring and hiding properties, and are not cut by an applied force when peeled after use as a line tape. Also, comparing the OPP film base with the PVC film base, the PVC base has a specific elasticity, and by using this elasticity, it is possible to apply the line tape not only in a straight line but also in an arc shape. it can.

However, in order to prevent the generation of dioxin, which has recently become a problem during incineration, the above-mentioned PVC film substrate is difficult to dispose of in a well-equipped incineration facility. There is a problem that some of the plasticizers used as the above are likely to be designated as environmental hormones.

[0004] The hand-cutting property that enhances the usability of the line tape does not appear in the OPP film substrate or the PVC film substrate. In order to impart hand-cutting properties, a paper tape, a cellophane film, an OPP film having unidirectional stretching (uniaxially stretched OPP) or the like is generally used as a substrate. However, line tapes using these base materials have problems such as the necessity of stiffening at the time of hand cutting, and the fact that they do not cut cleanly at the time of cutting.

Further, it is difficult to expect coloring and hiding properties of the cellophane film substrate due to the light transmission characteristic of the film. In the case of a paper tape substrate or a uniaxially stretched OPP film substrate, it is difficult to remove the line tape. In some cases, the substrate was cut due to insufficient strength of the substrate. Therefore, as the base material of the above-mentioned line tape, there is no material that has a moderate elasticity and a good hand cutting property.

As an improvement over the above-mentioned drawbacks, for example, Japanese Patent Publication No. 50-13306 discloses that a melt-extruded sheet is embossed to form irregularities on one surface, and a pressure-sensitive adhesive layer is formed on the other smooth surface. Provided adhesive tapes have been proposed. The pressure-sensitive adhesive tape reduces the rewinding force when it is wound into a wound body, has drawability on the concave-convex surface, and has a pressure-sensitive adhesive layer on the smooth surface, making it easy to apply the pressure-sensitive adhesive and improving productivity. There are advantages such as no adverse effect. However, after applying the adhesive, at the time of winding, rewinding or winding, the adhesive gradually becomes more or less familiar to the uneven surface, and the unevenness is transferred to the adhesive surface, resulting in a smooth adhesive surface As a result, there is a problem that the bonding area is reduced and the adhesive strength is reduced.

[0007] Further, Japanese Patent Application Laid-Open No. 3-57885 discloses that
An adhesive tape has been proposed in which a melt-extruded sheet is embossed to form irregularities on one surface and an adhesive layer is provided on the irregular surface. This adhesive tape has little decrease in adhesive strength itself and generally shows good adhesive physical properties,
Particularly at low temperatures, there is a problem that the initial bite on the adherend surface is inferior due to uneven distribution of the adhesive thickness.

For example, even if embossing is performed on one side and the same amount of pressure-sensitive adhesive is applied to both sides of a polyethylene resin substrate having a smooth surface on the other surface, the adhesive force is always equal to or less than the embossed surface. In general, this tendency becomes more remarkable as it goes to a lower temperature region. Furthermore, since the pressure-sensitive adhesive is applied to the uneven surface, there are drawbacks that air bubbles are involved and the pressure-sensitive adhesive surface is roughened, and there is a problem that productivity is reduced if stable quality is to be maintained.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, has good coloring properties and concealing properties, has moderate elasticity and substrate strength excellent in peeling force, and is hand-cut. It is an object of the present invention to provide a line tape which has good properties and is easy to dispose after use.

[0010]

According to a first aspect of the present invention, there is provided a line tape which solves the above problems and has a thickness of 30 to 300 μm containing a color pigment.
m on at least one side of the polyolefin resin film,
Substantially perpendicular to the longitudinal direction, 1/3 to 2/3 of the film thickness
An adhesive layer is laminated on one surface of the support film (I) in which a concave groove having a depth of is formed, and has a visible light transmittance of 15% or less.

The line tape according to the third aspect of the invention (hereinafter referred to as the third invention) is arranged so that at least one side of a transparent polyolefin resin film having a thickness of 30 to 300 μm is substantially orthogonal to the longitudinal direction, 1/3 to 2
Film having concave grooves with a depth of 3/3 (II)
On one surface, a color pigment-containing thickness of 5 to 100 μm
And a pressure-sensitive adhesive layer is laminated on the other surface, and has a visible light transmittance of 15% or less.

Hereinafter, the first invention will be described in detail.

The line tape according to the first invention is a polyolefin resin film containing a color pigment, a support film (I) in which a concave groove is formed on at least one surface, and a pressure-sensitive adhesive layer laminated on one surface of the support film (I). Become.

As the support film (I), a polyolefin resin film containing a color pigment having a thickness of 30 to 300 μm (portion where no groove is formed) is used. If the thickness is less than 30 μm, the concealing property is insufficient, and if it exceeds 300 μm, sufficient hand-cutting property cannot be obtained. Examples of the polyolefin resin film include resin films such as polyethylene and polypropylene, and may be a resin film of an olefin copolymer. Those containing halogen are not preferable from the viewpoint of environmental load.

As the above-mentioned coloring pigment, those generally used for coloring a polyolefin resin film can be used. For example, titanium oxide is mentioned as a white pigment. Further, to the polyolefin resin used for the support film (I), an antioxidant may be added for preventing deterioration, and calcium carbonate may be added for improving hand-cutting property and for improving coloration.

On at least one side of the support film (I), a concave groove substantially perpendicular to the longitudinal direction of the support film is formed. As a method of forming the concave groove, for example, a method of pressing the support film (I) by the nip pressure of the embossing roll is adopted. The depth of the concave groove is provided so as to be 1/3 to 2/3 of the thickness of the support film (I).
If the depth of the concave groove is smaller than 1/3 of the film thickness, sufficient hand-cutting property is not exhibited, and if it exceeds 2/3 of the film thickness, the strength is insufficient, and the film breaks when pasting. May cause.

One or both surfaces of the support film (I) may be subjected to a corona treatment, if necessary.

The line tape of the first invention can be obtained by laminating a pressure-sensitive adhesive layer on one surface of the support film (I), but is preferably on the concave groove forming side. The pressure-sensitive adhesive layer may be formed by directly coating and drying the pressure-sensitive adhesive on the support film (I), or once forming the pressure-sensitive adhesive layer by coating the pressure-sensitive adhesive on release paper and drying. It may be transferred onto the film (I). As the adhesive,
A rubber-based or acrylic-based adhesive is preferably used. A tackifier, oil, calcium carbonate, or the like may be added to the rubber-based pressure-sensitive adhesive.

Since the pressure-sensitive adhesive used is required to have releasability, the line tape is preferably designed so as to increase the cohesive force of the pressure-sensitive adhesive so that adhesive residue is less likely to occur. Further, it is preferable to minimize the increase in adhesive force caused by pressure bonding, ambient temperature, sunlight and the like.

The non-adhesive surface of the support film (I) may be subjected to a release treatment by applying a release agent. As the release agent, a silicone-based or organic release agent is used.

[0021] The line tape of the first invention is based on a laminate in which a polyolefin resin layer is laminated on the concave groove forming surface of the support film (I), and an adhesive layer is formed on one of the surfaces of the substrate. May be laminated. As the polyolefin resin, the same polyolefin resin as that used for the support film (I) may be used,
Different polyolefin resins may be used. The pressure-sensitive adhesive layer can be provided by the same method as described above.

As a method of laminating a polyolefin resin layer on the support film (I), an extrusion lamination method is generally used. The thickness of the laminated polyolefin resin layer is preferably 5 to 100 μm. The thickness is 5μm
If it is less than 100 μm, it is impossible to tune to the line speed, and the lamination may be cut off on the concave groove.
If it exceeds m, hand-cutting properties may be significantly impaired.

The melt index (MI) of the polyolefin resin is generally preferably 2 to 10 g / 10 minutes, though it depends on the balance with coating suitability.

Next, the third invention will be described. In the line tape of the third invention, a colored resin layer containing a colored pigment is laminated on one surface of a support film (II) in which a concave groove is formed on at least one surface of a transparent polyolefin resin film, and is adhered to the other surface. It consists of a laminate in which agent layers are laminated.

As the support film (II), a transparent polyolefin resin film having the same grooves as in the first invention is used. The thickness of the support film (II) (portion where no groove is formed) is limited to 30 to 300 μm for the same reason as in the first invention. As the polyolefin resin film, the same resin film as in the first invention is used. Further, the depth of the concave groove is limited to 1/3 to 2/3 of the thickness of the polyolefin resin film for the same reason as in the first invention.

The thickness of the colored resin layer laminated on one surface of the support film (II) is limited to 5 to 100 μm. If the thickness is less than 5 μm, sufficient concealing properties cannot be obtained,
If it exceeds 100 μm, hand-cutting properties may be impaired. The colored resin layer can be laminated on one surface of the support film (II) by, for example, an extrusion lamination method.

The pressure-sensitive adhesive layer laminated on the other surface of the support film (II) can be provided by the same method as in the first invention using the same pressure-sensitive adhesive as in the first invention.

The line tape of the third invention is colored by laminating a colored resin layer using a highly versatile transparent support film, and thus has an advantage that the amount of pigment used can be reduced.

The visible light transmittance of the line tape of the present invention is limited to 15% or less, and preferably 10% or less.
If the visible light transmittance exceeds 15%, the underlying color is seen through, so that the display performance as a line tape is inferior. The visible light transmittance is a value measured using "Color Computer SS1" manufactured by Suga Test Instruments Co., Ltd.

The tensile strength of the line tape of the present invention is 5N
It is preferably at least / 10 mm width. Tensile strength is 5
If the width is smaller than N / 10 mm, the tape may break due to insufficient strength when the line tape is developed.

(Function) In the line tape of the present invention, a good hand-cutting property is developed in the width direction of the line tape by providing the support film with the concave groove. Further, when a tensile stress acts on the support film, elongation occurs in a portion where the thickness of the concave groove portion is small, and moderate elasticity is developed.

[0032]

Embodiments of the present invention will be described below.

[Preparation of Acrylic Adhesive] A mixture of 47% by weight of butyl acrylate, 47% by weight of 2-ethylhexyl acrylate, 5% by weight of acrylic acid and 1% by weight of 2-hydroxyethyl methacrylate was polymerized to form an acrylic resin. A copolymer was obtained. A curing agent (“Coronate L-45” manufactured by Nippon Polyurethane Co., Ltd.) was mixed with the acrylic copolymer so that the weight ratio of solid content was 1: 1 to prepare an acrylic adhesive.

Example 1 Polyethylene resin (density:
0.930 g / cm ³ , MI = 6.7 g / 10 min) 50
%, 20% by weight of calcium carbonate and 30% by weight of titanium oxide (white pigment) were melt-extruded to obtain a colored polyethylene resin film having a thickness of 150 μm. 60μ
The support film (I) was manufactured by forming a concave groove of m. After subjecting both surfaces of the support film (I) to a corona treatment of 42 × 10 ⁻⁵ N / cm, a long-chain alkyl-based release agent is applied to the smooth surface side to form a release agent layer, and a groove is formed. A line tape sample was prepared by applying an acrylic pressure-sensitive adhesive to the surface and drying it for 3 minutes in a drying box at 90 ° C. to provide a pressure-sensitive adhesive layer having a thickness of 30 μm.

(Example 2) The same polyethylene film (density:
0.924 g / cm ³ , MI = 4.0 g / 10 min) 70
A mixture obtained by mixing at a ratio of 30% by weight and 30% by weight of titanium oxide (white pigment) was extrusion-laminated at 280 ° C. to prepare a laminate base material having a 30 μm-thick polyethylene resin layer formed thereon. 42 × 10 ⁻⁵ N /
cm of corona treatment, a long-chain alkyl-based release agent is applied to the support film (I) side surface to form a release agent layer,
A line tape sample was prepared in the same manner as in Example 1, except that an acrylic pressure-sensitive adhesive layer was provided on the other side.

Example 3 A support film (II) was obtained by forming a concave groove having a depth of 60 μm on one surface of a transparent polyethylene resin film having a thickness of 150 μm using an embossing roll. Polyethylene resin (density: 0.924 g / cm ³ , MI = 4.0 g)
/ 10 min) 60% by weight and titanium oxide (white pigment) 40
A mixture mixed at a ratio of weight% was extrusion-laminated at 280 ° C. to produce a laminate base material having a 50 μm-thick polyethylene resin layer formed thereon, and a line tape sample was produced in the same manner as in Example 2.

(Comparative Example 1) Polyethylene resin (density:
0.930 g / cm ³ , MI = 6.7 g / 10 min) 50
A mixture of 20% by weight of calcium carbonate, 20% by weight of calcium carbonate, and 30% by weight of titanium oxide (white pigment) was melt-extruded to obtain a polyethylene resin film having a thickness of 20 μm. The support film (I) was prepared by forming a groove, and a line tape sample was prepared in the same manner as in Example 1.

Comparative Example 2 Polyethylene resin (density:
0.930 g / cm ³ , MI = 6.7 g / 10 min) 50
% By weight, a mixture of 20% by weight of calcium carbonate and 30% by weight of titanium oxide (white pigment) was melt-extruded to obtain a polyethylene resin film having a thickness of 350 μm, and a concave portion having a depth of 120 μm was formed on one side by an embossing roll. The support film (I) was prepared by forming a groove, and a line tape sample was prepared in the same manner as in Example 1.

(Comparative Example 3) A polyethylene resin (density:
0.924 g / cm ³ , MI = 4.0 g / 10 min) 70
A mixture obtained by mixing at a ratio of 30% by weight of titanium oxide (white pigment) and 30% by weight of the titanium oxide (white pigment) was extrusion-laminated at 280 ° C. to prepare a laminate substrate having a polyethylene resin layer having a thickness of 3 μm. A line tape sample was prepared in the same manner.

(Comparative Example 4) A polyethylene resin (density:
0.924 g / cm ³ , MI = 4.0 g / 10 min) 70
A mixture obtained by mixing at a ratio of 30% by weight and titanium oxide (white pigment) at 30% by weight was extrusion-laminated at 280 ° C. to prepare a laminate substrate having a polyethylene resin layer having a thickness of 110 μm. A line tape sample was prepared in the same manner.

(Comparative Example 5) A polyethylene resin (density:
0.924 g / cm ³ , MI = 4.0 g / 10 min) 60
A mixture obtained by extruding a mixture obtained by mixing at a ratio of 40% by weight of titanium oxide (white pigment) and 40% by weight of the titanium oxide (white pigment) at 280 ° C. to prepare a laminate substrate on which a polyethylene resin layer having a thickness of 3 μm was formed. A line tape sample was prepared in the same manner.

(Comparative Example 6) A polyethylene resin (density:
0.924 g / cm ³ , MI = 4.0 g / 10 min) 60
A mixture obtained by mixing at a ratio of 40% by weight and titanium oxide (white pigment) at 40% by weight was extrusion-laminated at 280 ° C. to prepare a laminate substrate having a 150 μm-thick polyethylene resin layer formed thereon. A line tape sample was prepared in the same manner.

With respect to the line tape sample and the support film (I) or the laminate base material, the following items were evaluated for performance. The results are shown in Table 1. (1) Hand-cutting property The line tape sample was cut by hand, and the sensory hand-cutting property was evaluated based on the following criteria. ：: It could be cut very easily. ：: Cutting was relatively easy. Δ: There were some parts that were difficult to cut, but there were no major problems in practical use. X: Cutting was extremely difficult and unusable.

(2) Visible Light Transmittance The visible light transmittance of the line tape sample was measured using “Color Computer SS1” manufactured by Suga Test Instruments Co., Ltd. and evaluated according to the following criteria. A: Visible light transmittance was 5% or less. Good: The visible light transmittance was more than 5% and 10% or less. Δ: Visible light transmittance was more than 10% and 15% or less. X: The visible light transmittance exceeded 15%.

(3) Concealment The concealment of the line tape sample was affixed to a standard brown flooring material, and the sensory concealment was evaluated according to the following criteria. A: Very good concealability. ：: The concealability was relatively good. X: The concealing property was poor, and the color of the floor material was transparent.

(4) Elasticity The line tape sample was stretched by a human hand, and the sensual elasticity was evaluated according to the following criteria. A: Very good elasticity. ：: The elasticity was relatively good. ×: Poor elasticity, unusable.

(5) Tensile Strength The tensile strength per 10 mm width of the supporting film (I) or the base material of the laminate at a tensile speed of 300 mm / min was measured by a tensile tester.

[0048]

[Table 1]

[0049]

The line tape of the present invention has the above-mentioned constitution, has good color developability and concealing property, has moderate elasticity and substrate strength superior to peeling force, and has good hand-cutting property. Well, disposal after use is relatively easy. Therefore, the present line tape can be suitably used instead of a line tape based on a vinyl chloride resin.

Claims (4)

[Claims] 1. A thickness containing a color pigment of 30 to 300 μm.
m on at least one side of the polyolefin resin film,
Substantially perpendicular to the longitudinal direction, 1/3 to 2/3 of the film thickness
A line tape, characterized in that a pressure-sensitive adhesive layer is laminated on one surface of a support film (I) having a concave groove having a depth of 15 mm and visible light transmittance is 15% or less. 2. The line according to claim 1, wherein a pressure-sensitive adhesive layer is laminated on one surface of a laminate base material in which a polyolefin resin layer is laminated on the concave groove forming surface of the support film (I). tape. 3. A transparent polyolefin resin film having a thickness of 30 to 300 μm is provided on at least one surface thereof with a groove which is substantially perpendicular to the longitudinal direction and has a depth of 1/3 to 2/3 of the film thickness. A colored resin layer having a thickness of 5 to 100 μm containing a colored pigment is laminated on one side of the supporting film (II), and an adhesive layer is laminated on the other side, and the visible light transmittance is 15% or less. A line tape, characterized in that: 4. The line tape according to claim 1, wherein a tensile strength is 5 N / 10 mm width or more.