JP2002256230A - Rolled adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolled adhesive tape suitable for ordinary winding work and applicable to a winding object having a narrow space around the object without lowering the workability. SOLUTION: The rolled adhesive tape is composed of an adhesive tape 2 having a substrate and wound on a tubular winding core 1. When a compressive load is applied to two circumferential parts a1, a2 at both sides of the adhesive tape opposite to each other, two inner circumferential parts corresponding to the parts a1, a2 on the inner circumference of the tubular winding core 1 are brought into contact with each other under a compressive load of 9.8-196 N/19 mm width. When 10 min is lapsed after removing the compression load after the contact, the distance between the parts a1 and a2 becomes <=90% of the distance before compression.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped pressure-sensitive adhesive tape structure, and more particularly, to a method for easily winding a target object arranged such that a narrow space exists around the object. The present invention relates to a roll-shaped pressure-sensitive adhesive tape structure capable of performing a coating operation.

[0002]

2. Description of the Related Art Adhesive tape with a support (hereinafter referred to as "tape")
Is also referred to as having a pressure-sensitive adhesive layer provided on a belt-like support made of a polyethylene (PE) -based material or a polyvinyl chloride (PVC) -based material, and having strength, elongation, flexibility, and general-purpose properties. It has been used for various coating applications because of its properties. Among the adhesive tapes with a support, in particular, PV
When the C-based material is used for the support, it is used for bundling, protection, corrosion prevention, etc. of piping lines (for example, water, electricity, gas, etc.) due to its weather resistance, flame retardancy, chemical resistance, and electrical insulation. Have been.

A pressure-sensitive adhesive tape with a support is usually wound around a cylindrical core, and is commercialized as a roll-shaped pressure-sensitive adhesive tape structure. To use it, the tape is rewound and wrapped around the object while the structure is wrapped around the surface of the object in a rolling manner to achieve binding and protection. This operation is a winding coating operation.

[0004] When a tape is wound around an object such as a pipe to cover the object, the tape is wound in advance as a pre-treatment,
There are a case where the target is placed at a predetermined position, and a case where the target is placed at a predetermined position (for example, near a wall surface) and then wound. In the latter case, the object is often fixed close to the wall in order to increase the space utilization efficiency of the installation location. When such a tape is to be wound around an object having a narrow space around the structure, the structure cannot pass through the narrow space by using a normal roll-shaped pressure-sensitive adhesive tape structure. It is difficult to apply and cover.

Conventionally, in such a winding coating operation,
In order to allow the roll-shaped pressure-sensitive adhesive tape structure to pass through a narrow space, a method of using a tape having a small remaining amount and a small outer diameter has been used. However, such a method significantly reduces the efficiency of the operation.

On the other hand, a roll-shaped pressure-sensitive adhesive tape structure without a paper core is manufactured so that it can pass through a narrow space even with a large outer diameter with a large amount of winding remaining so that it can be easily deformed into a flat shape. There are also products. However, when examining such products, due to the elasticity of the tape wound in a roll,
Since it immediately returns to its original cylindrical shape, it has been found that it has to be pressed and flattened each time it passes through a narrow space (that is, each time it is wound once). Further, in such a product, since the paper core is not provided from the beginning, when the tape is wound in a wide space without any obstacle, the tape is compared with a normal product having a paper core due to excessive flexibility. It was also found that the operation of rewinding could not be performed smoothly.

US Pat. No. 3,006,464 discloses that a pressure-sensitive adhesive tape is wound around a cardboard cylindrical core, the core is removed, and then the center of the tape roll is completely flattened. There is disclosed a shuttle-type pressure-sensitive adhesive tape roll produced by pressing with a press, and a shuttle-type pressure-sensitive adhesive tape roll in which a separator plate is provided at a central portion (a portion from which a core is removed) of the tape roll.

However, since such a product is deformed flat from the beginning, it becomes a product dedicated to working in a narrow space. When used in the above operation, the winding workability is inferior to that of the cylindrical shape. Further, at the time of manufacturing, a step of removing the core and pressing flat is added, so that the cost is increased. Further, in a mode in which the separator plate is added to the center, the cost is higher due to the cost of inserting the separator and the cost of inserting the jig.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, to be suitable for ordinary wrapping and covering work, and to reduce the work required for an object having a narrow space around it. An object of the present invention is to provide a roll-shaped pressure-sensitive adhesive tape structure that can be used without impairing the properties.

[0010]

Means for Solving the Problems The roll-shaped pressure-sensitive adhesive tape structure of the present invention has the following features. (1) A roll-shaped pressure-sensitive adhesive tape structure having a cylindrical core and a pressure-sensitive adhesive tape with a support wound around the core, wherein the structure includes the following (A) and (B): The nature of
It is characterized by having at the same time. (A) When a compressive load is applied to two outer peripheral portions of the outer peripheral surface of the structure that are directly opposite to each other and are compressed toward the center, the inner peripheral surface of the cylindrical core is compressed. The two inner peripheral portions corresponding to the outer peripheral portion on the center side can contact each other with a compression load of 9.8 N / 19 mm width to 196 N / 19 mm width. (B) When the compression is released after the contact, the distance between the two outer peripheral points at the time when 10 minutes have passed from the release is 90% or less of the distance before compression. (2) In the above structure, the cylindrical core is a cylindrical core, and the inner diameter is 25 mm to 38 mm. (3) In the above structure, the material of the cylindrical core is paper, and the thickness of the core is 0.5 mm to 1.5 mm. (4) In the above structure, a supporting core is detachably added to the inside of the cylindrical core, and when the supporting core is removed, the property of (A) is achieved. . (5) In the above structure, the material of the support of the pressure-sensitive adhesive tape with the support is polyethylene or polyvinyl chloride. (6) In the above structure, the thickness of the pressure-sensitive adhesive tape with a support is 5 mm to 30 mm.

[0011]

FIG. 1 is a perspective view showing a roll-shaped adhesive tape structure of the present invention. The structure is composed of a cylindrical core 1 and a pressure-sensitive adhesive tape 2 with a support wound around the core, and the material, dimensions and manufacturing conditions of each part are selected, and ) And (b) are simultaneously satisfied.

First, a method for measuring the properties (a) and (b) will be described. In the nature of the above (A), “two outer peripheral portions that are in a positional relationship directly opposite to each other” refer to FIG.
As shown by an example in (a), when the structure is sandwiched between opposing parallel surfaces j1 and j2, there are two points a1 and a2 on the outer peripheral surface that come into contact with the two surfaces. Are mutually 180 ° out of 360 ° of the outer circumference of the roll body.
In a positional relationship. The parallel surfaces j1 and j2 are two surfaces of the device for compressing the structure toward the center and measuring the applied compressive load, and have an area large enough to compress the structure. . Therefore, the cylindrical core 1
Is a cylindrical winding core, two outer peripheral portions a1, a2
Each has a linear shape (because of line contact) when no load is applied, and changes to a planar shape when a compressive load is applied.

[0013] Similarly, the "two inner peripheral portions" refer to FIG.
As shown in the example of (a), the outer peripheral portions a1, a
The two positions b1 and b2 on the inner peripheral surface of the cylindrical core 1 respectively correspond to the center in the center direction. When the roll body is compressed, in a normal mode, the inner peripheral surface of the cylindrical core is deformed into two opposing flat surfaces, and the two inner peripheral portions b1,
b2 makes surface contact with each other, including contact with each other. Further, depending on the way of deformation at the time of compression, the two inner circumferential points b1, b2
In some cases, only local contact occurs.

[0014] The distance between the two outer peripheral points at the time when 10 minutes have passed since the release is determined after the time has passed.
Equilibrium may be reached and maintained constant, or may continue to change.

In the above (A), the measurement for compressing the structure and measuring the compression load at that time is performed according to JIS K6
911 Thermosetting Plastics General Test Method (5-19
(Compression strength). Measurement of compressive load is based on atmospheric pressure,
Perform at 21 ° C to 25 ° C. During compression, 300 mm / min to 500 mm /
The strain in the center direction of the structure is increased at a rate of minute, and when at least two inner peripheral portions come into contact with each other, the increase in the strain is stopped, and the value at that time is read.

The release of the compression in the above (b) is an immediate release when the inner peripheral portion comes into contact by the compression.

The property (b) is based on the two outer peripheral points a1 and a2 defined before the compression in the above (a), the distance L1 between the two before the compression, and the time 10 minutes after the decompression. And the distance L2 between the two is measured, and the equation (L2 /
L1) × 100 (%). The above is the method for measuring the properties (a) and (b).

In the above-mentioned property (a), the compression load when the two inner peripheral portions come into contact with each other is 9.8 N / 19
mm width to 196 N / 19 mm width, during normal work until a situation where narrowing is required in which flattening is required, it can be used like a conventional product without being collapsed by a certain force, and When a situation that requires flattening comes, it becomes possible for the worker to flatten with the grip force on the spot. Also, in this load range, in order to achieve a higher degree of prevention of flattening during normal work and easy flattening for use, a width of 49 N / 19 mm to 196 N / 19 mm, particularly 98 N / 19 mm wide.幅 147 N / 19 mm width is a preferable range of the compression load.

The unit of the compression load “N / 19 mm width” used in the present specification is a value obtained by converting the load at the time of compression in a structure having various widths into a value per 19 mm width. Thus, it is not intended that the width of the structure be limited to only 19 mm.

As described in (a) above, when the structure is compressed, the structure may be deformed in proportion to an increase in the load, or may be gently deformed up to a specific compression load. However, it may be one which yields by the compressive load and is suddenly deformed.

The property (b) indicates that once the structure is crushed, it is difficult to restore it.
It is preferably at most 0%, more preferably at most 80%, particularly preferably at most 50%. As this value is smaller, the flattened state is maintained for a longer time, so that there is no need to perform compression again during the winding operation, and the operation becomes easier.

Although the material of the cylindrical core is not limited, paper, aluminum, polyethylene, polypropylene and the like are preferable materials for easily satisfying the above conditions (a) and (b). In terms of having the property of suitably preventing the resilience against the elasticity of the attached adhesive tape, paper,
Aluminum is preferred, and paper is particularly preferred in terms of cost, versatility of distribution, and treatment after use.

When paper is used as the material of the cylindrical core, for example, a paperboard having a thickness of 0.1 mm to 1.5 mm
Wound around 10 layers, thickness 0.5mm ~ 1.5mm,
In particular, it is preferable to use a winding core of 0.5 mm to 1.0 mm. If the thickness of the paper core is smaller than 0.5 mm, the core becomes excessively flexible, the elasticity of the adhesive tape with the support becomes dominant, and the shape of the adhesive tape recovers to the original shape. It is also difficult to satisfy the property of b). Furthermore, in the case of a normal operation up to an operation of passing through a narrow space, the entire structure is excessively flexible, so that it is difficult to smoothly rewind the adhesive tape. On the other hand, if the thickness of the paper core is larger than 1.5 mm, the rigidity of the core becomes excessively large, and it is difficult to satisfy the above-mentioned property (a) even when a flexible adhesive tape with a support is used. It becomes difficult for a person to deform the structure by hand.

The cross-sectional shape of the cylindrical core (the cross-sectional shape perpendicular to the axis of the cylinder) is not limited, but the core itself is easy to manufacture, and the adhesive tape with a support is preferably wound around the core. An annular shape is preferable because the tape can be smoothly fed out during use. That is, a cylindrical core is preferable as the cylindrical core.

Although the inner diameter of the cylindrical core is not limited, when the structure is used for binding wiring, etc., it is necessary to hang the finger inside the core to transmit a sufficient binding force to the tape by 25 mm.
Preferably, the inner diameter of the winding core is 38 mm or less in view of the external dimensions after flattening to allow passage through a narrow space around the core.

As shown in FIG. 3, a highly rigid supporting core 3 is detachably provided inside the cylindrical core 1 as shown in FIG. 3, so that the rigidity of the structural body is increased and the structure is hardly flattened. May be. According to this aspect, the cylindrical core is reinforced, so that when the adhesive tape with the support is wound around the cylindrical core in the manufacturing process, even if there is a tight tightening due to the tension applied to the tape, Is no longer crushed inward. In addition, during the normal operation up to the operation of passing through a narrow space, the same preferable tape rewinding operation as the conventional hard product can be performed by being supported by the supporting core, and when working through the narrow space, By extracting the supporting core, the properties (a) and (b) above appear, and the flattening can be easily performed on the spot.

Further, even when the above-mentioned supporting core is added,
It is good also as an aspect which satisfies the property of the above (a) and (b). This makes it possible to respond to the strength of the grip force of each worker, and by extracting the supporting core, even a person with a weak grip force can easily flatten. The above-mentioned strong supporting core may be further added inside such a supporting core.

The supporting core is not limited to a cylindrical core, a solid columnar shape, a spoke shape, etc., as long as it can reinforce the cylindrical core of the structure. As described in the description of the above, from the viewpoint of the work of hanging a finger, a cylindrical shape concentric with the cylindrical core, particularly a cylindrical shape is preferable. The material of the supporting core is not limited, and may be the same as that of the cylindrical core.

The cylindrical core having a removable core is prepared by applying the above-mentioned paperboard to a predetermined thickness on the outer surface of the core by using an adhesive such as polyvinyl acetate if necessary. It can be produced by winding one or several layers.

As a support material of the pressure-sensitive adhesive tape with a support, polyvinyl chloride (for example, soft polyvinyl chloride, etc.), polyolefin-based material (for example, polyethylene,
Ethylene-vinyl acetate copolymer, polypropylene, etc.), and Japanese paper. As described in the prior art, polyvinyl chloride and polyethylene are preferred from the viewpoints of good weather resistance, flame retardancy, chemical resistance, and electrical insulation.

The thickness of the support of the pressure-sensitive adhesive tape with a support capable of achieving the properties (a) and (b) is 0.05 mm to
0.5 mm, particularly preferably 0.1 mm. 1 mm to 0.3 mm. The width of the support (= the width of the structure) is 10 m.
m to 100 mm, particularly preferably 25 mm to 50 mm. The total length of the support is 5 m to 30 m, particularly preferably 5 m to 10 m.

As the material of the pressure-sensitive adhesive layer formed on the support, conventionally known materials may be used. Natural rubber, natural rubber / styrene-butadiene rubber (SBR), butyl rubber, styrene-isoprene- Examples include styrene block copolymer (SIS), acrylic, and silicone. As a method for applying the pressure-sensitive adhesive, any of known methods can be used, and examples thereof include a reverse coater, a hot melt die coater, a fountain coater, and a calendar application.

In the manufacturing process, when the adhesive tape with the support is wound around the cylindrical core, the tension is 2
9.4 N / m to 196 N / m is a preferable value. With this value, the winding rigidity of the structure can be changed, and the above-mentioned properties (a) and (b) can be achieved. The winding thickness of the pressure-sensitive adhesive tape with the support is 5 mm to 5 mm from the inner diameter and thickness of the cylindrical core, the entire length of the tape, and the tension.
It is about 30 mm.

The materials and shapes and dimensions of the cylindrical core, the material and dimensions of the support of the pressure-sensitive adhesive tape with the support, the tension when winding the tape, and the thickness of the roll are described in the above ranges. What is necessary is just to select and combine so that the property of (a) and (b) may be simultaneously satisfied, and to comprise the said structure.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of conditions and numerical values of respective parts for simultaneously satisfying the above properties (a) and (b) will be described below, but the present invention is limited to only the following examples. is not.

Embodiment 1 The specifications of each unit selected in this embodiment are as follows. Cylindrical core: 0.5 mm thick, 50 width made of three layers of paperboard
mm and a cylindrical core having an inner diameter of 30 mm. Adhesive tape with support: Total thickness 0.2 mm, width 50 mm, total length about 10 m. The material of the support was soft polyvinyl chloride (containing DOP (dioctyl phthalate) as a plasticizer at 50% by weight of the total polyvinyl chloride resin), and the thickness of the support was 0.17 mm. Also, as the adhesive layer,
Using natural rubber / SBR adhesive, thickness about 0.03mm
It painted so that it might become.

The adhesive tape with a support is wound around the cylindrical core at a tension of 98 N / m, so that the thickness of the adhesive tape with a support is about 15 mm, and the total outer diameter is 61 mm ( That is, a distance L1 between two outer peripheral portions before compression) and a cylindrical structure having a width of 50 mm were obtained.

(Evaluation) When the compression load at the time when at least two outer peripheral portions contact each other was measured on the obtained structure by the measuring method and the measuring device described in (a) above, the structure was 98 N / 19 mm wide. It was found that the above-mentioned property (a) was satisfied. Further, the distance L2 between the outer peripheral points at the time when 10 minutes have elapsed from the compression release is 5
5 mm, so (L2 / L1) × 100 = 90
%, Thus satisfying the property (b).

The structure obtained in Example 1 was applied to an actual winding and covering operation, and the workability was confirmed. Was good. Also, when working in a narrow space around the work, it can be easily flattened with one hand, and in the winding work, it does not return to the original shape every 2-3 turns, making it flatter And it was possible to continue winding work by passing through a narrow space.

Example 2 In this example, the structure was obtained under the same conditions as in Example 1 except that the thickness of the cylindrical core was further increased in the outer diameter direction to 1.0 mm. Was.

When evaluated in the same manner as in Example 1, the compression load was 117.6 N / 19 mm width, (L2 / L1) × 10
0 = 85%, which proves that both the properties (a) and (b) are satisfied. In the structure obtained in the second embodiment, since the thickness of the paper-made cylindrical core is increased as compared with the first embodiment, a greater force is required for flattening. Once flattened to withstand the elasticity of the adhesive tape, it is more difficult to recover.

Example 3 In this example, the structure was obtained under the same conditions as in Example 1 except that the thickness of the cylindrical core was further increased in the outer diameter direction to 1.5 mm. Was.

When evaluated in the same manner as in Example 1, the compression load was 147 N / 19 mm width, (L2 / L1) × 100 =
83%, which proves that both the properties (a) and (b) are satisfied. According to the confirmation of the workability by the worker, it was found that if the workability was too hard, the flattening would be difficult with an average worker's force. Further, the structure obtained in the present embodiment has characteristics that are more difficult to restore than those obtained in the second embodiment.

Example 4 In this example, the structure was obtained under the same conditions as in Example 1 except that an aluminum cylindrical core was used. The cylindrical core was produced in the same manner as the paper core except that aluminum foil was used. The cylindrical core had a thickness of 0.2 mm and an inner diameter of 30 mm.

When evaluated in the same manner as in Example 1, the compression load was 78.4 N / 19 mm width, (L2 / L1) × 100.
= 75%, which proves that both the properties (a) and (b) are satisfied. In the configuration of the present embodiment, the plastic deformability of aluminum well resists the elasticity of the tape portion.

Embodiment 5 In this embodiment, a 1.5 mm thick supporting core (30 mm in inner diameter) made of paper is further provided inside the cylindrical core of the structure obtained in the third embodiment. Was made so that it could be extracted. At the time of production, a removable core core was formed in advance with a double inner / outer structure, and an adhesive tape with a support was wound around the core.

When the evaluation was made in the same manner as in Example 1, the compression load was 245 N / 19 mm when the supporting core was inserted.
The width was so large that it exceeded the range of (a) above and could not be flattened by the force of both hands of the worker. The product after the support core was removed had the same characteristics as those obtained in Example 3, and it was found that the product could be handled as a conventional product until it was used.

Comparative Example 1 In this comparative example, in order to investigate the effect of the thickness of the cylindrical core,
The structure was obtained under the same conditions as in Example 1 except that the thickness of the paper core was set to 0.1 mm. Example 1
When evaluated in the same manner as above, the compression load was 58.8 N / 19.
mm width and satisfies the property of (a) above,
(L2 / L1) × 100 = 100%, indicating that the property (b) was not satisfied.

Comparative Example 2 In this comparative example, contrary to the above-described comparative example 1, the structure was manufactured under the same conditions as in the example 1 except that the thickness of the paper-made cylindrical core was 3 mm. I got When evaluated in the same manner as in Example 1, it was found that the compression load was 294 N / 19 mm width, which greatly exceeded the property of the above (A), and that the flattening could not be performed at all by the force of the operator. However, (L2 / L1) ×
100 = 85%.

[0050]

As described above, the roll-shaped pressure-sensitive adhesive tape structure according to the present invention has the above-mentioned properties (a) and (b) at the same time, so that it is moderately hard in ordinary winding and covering operations. When working on an object that has a narrow space around it, workers can easily flatten it by hand,
The shape that can pass through a narrow space is maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a roll-shaped pressure-sensitive adhesive tape structure of the present invention.

FIG. 2 is a diagram for explaining a method for measuring the properties (a) and (b).

FIG. 3 is a perspective view illustrating an example of an additional configuration of the structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical core 2 Adhesive tape with a support

Claims (6)

[Claims] 1. A roll-shaped pressure-sensitive adhesive tape structure comprising a cylindrical core and a pressure-sensitive adhesive tape with a support wound around the core; When a compressive load is applied to two outer peripheral portions having a positional relationship directly opposite to each other, and the structure is compressed toward the center, the inner peripheral surface of the cylindrical core corresponds to the outer peripheral portion on the center side. The two inner circumferences are 9.8 N / 19 mm wide to 196 N /
Can contact each other with a compression load of 19 mm width, and (b)
When the compression is released after the contact, the distance between the two outer peripheral points at the point of time when 10 minutes have passed from the release is 90% or less of the distance before compression, wherein the roll-shaped adhesive tape structure. 2. The roll-shaped pressure-sensitive adhesive tape structure according to claim 1, wherein the cylindrical core is a cylindrical core and has an inner diameter of 25 mm to 38 mm. 3. The roll-shaped pressure-sensitive adhesive tape structure according to claim 1, wherein the material of the cylindrical core is paper, and the thickness of the core is 0.5 mm to 1.5 mm. 4. A supporting core is detachably provided inside the cylindrical core, and when the supporting core is removed, the above property (a) is achieved. The roll-shaped pressure-sensitive adhesive tape structure according to claim 1. 5. The material of the support of the pressure-sensitive adhesive tape with the support,
The roll-shaped pressure-sensitive adhesive tape structure according to claim 1, which is polyethylene or polyvinyl chloride. 6. The thickness of the pressure-sensitive adhesive tape with a support is 5 mm to 3 mm.
The roll-shaped pressure-sensitive adhesive tape structure according to claim 1, which is 0 mm.