JPH09194801A - Extensible fixing tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extensible fixing tape suitably usable for a package such as a bag or box, or for rolling up sanitary goods such as paper dispers and sanitary napkins after using them. SOLUTION: In this fixing tape provided with a fixing means 4 in a non- extending part A2 at an end of a base material 1 composed of an extensible part B and substantially non-extensible parts A1, A2, the extensible part B can be extended to at least three times as long under a load of at least 1.5kg/25mm, the permanent set caused by 200% extension is at least 30%, and the composition of the non-extending part contains at least 30wt.% of the components of the composition of the extensible part B.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is preferably used for packaging such as bags and boxes, or for treating hygienic products such as paper diapers and sanitary napkins by rolling them up after use and treating them. Extendable fixing tape.

[0002]

2. Description of the Related Art Conventionally, various adhesive tapes which are folded and formed into a Z-shape have been known as fixing tapes for diapers (for example, Japanese Patent Publication No. 58-30401).
No. 52-47769, Japanese Examined Patent Publication 1-56163
Issue).

[0003]

Since none of these adhesive tapes are of a type that can be stretched during use, when the used diapers are rolled up and rolled up, the tape can be sufficiently fastened due to the short length of the tape. If the tape is pulled strongly, it will not stretch and the force will be transmitted to the article as it is, and one end of the tape fixed to the article will come off.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be easily stretched with a weak force during use, and the stretched portion is substantially Provide a fixing tape that is hard to shrink, extremely practical, and easy to use.

That is, the present invention is a fixing tape comprising a base material comprising an extending portion and a substantially non-extending portion, wherein fixing means is provided on the non-extending portion at least at one end, wherein the extending portion is provided. It can be stretched to a length of 3 times or more under a load of at least 1.5 kg / 25 mm, has a permanent set of 30% or more when stretched 200%, and has a composition of the stretched portion in addition to the composition of the stretched portion. The present invention relates to an extensible fixing tape containing the same amount of 30% by weight or more.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the extensible fixing tape of the present invention, in which both ends are substantially non-extended portions A1 and A2, and an extended portion B is provided between them.
Is folded at both ends of the extension B to form a Z shape. The pressure-sensitive adhesive layer 2 is provided as a fixing means on the inner surface of the non-stretched portion A1 and the outer surface of the non-stretched portion A2, and the stretched surface facing the pressure-sensitive adhesive layer 2 on the outer surface of the non-stretched portion A1 and the inner surface of the non-stretched portion A1. The release agent layer 3 is provided on the surface of the portion B. Further, a temporary attachment means 4 (described later) is provided between the extended portion B and the inner surface of the non-extended portion A2 for temporarily attaching them to maintain the Z-shape.

In FIG. 1, the fixing means provided on the outer surface of the non-expanding portion A2 is necessary for fixing one end of the fixing tape to the adherend, and as shown in FIG.
Is preferably used, but it is also possible to employ other materials such as an adhesive or a hook-shaped stopper depending on the adherend, and the invention is not limited to the pressure-sensitive adhesive layer.

Further, FIG. 1 shows an example in which a fixing means for re-peeling comprising the pressure-sensitive adhesive layer 2 is provided on the inner surface of the non-extendable portion A1, but such fixing means is required depending on the usage form. In some cases, other than the pressure-sensitive adhesive layer 2, as in the above case, other than the pressure-sensitive adhesive layer 2, for example, an adhesive or a hook-shaped locking object may be adopted depending on the adherend.

FIG. 2 is a schematic view showing a state in which the fixing tape of FIG. 1 is expanded and extended when it is used. For example, by pulling the non-extendable portion A1, the temporary attaching means 4 is opened to form the Z shape. While expanding, the extension portion B can be extended to a required length by further pulling A1 and can be fixed to the mating side with the adhesive layer 2.

The extending portion B is required to extend the entire length of the fixing tape so that the article is rolled up and rolled to be fixed, and the stress is reduced by extending the force of pulling by hand to extend. For the purpose of preventing the detachment of one end of the tape that is previously fixed to the article from the article and reducing the stress due to the expansion of the article after rolling the article, a small force is required during use. It is necessary to stretch.
Specifically, it is necessary to be able to extend to a length three times or more under a load of at least 1.5 kg / 25 mm. When the stretchability of the stretched portion B is less than 3 times, a large force is required to stretch the stretched portion B to a predetermined length, and one end portion of the tape which is fixed in advance is detached or the tape is difficult to stretch and difficult to use. It is not preferable because it has the drawback.

Further, the extended portion B is capable of freely adjusting the total length of the tape by hand to roll up an article having various outer perimeters for disposal (discarding, etc.) or expansion of the article after being attached to the article. For the purpose of suppressing the stretching, it is preferable that the film does not shrink much after being stretched, and specifically, the permanent set when stretched by 200% is 30% or more, particularly 50% or more. It is desirable not to go back. If it shrinks greatly after stretching, there is a disadvantage that the end force where the tape is fixed to the article in advance or the part for fixing or fixing the article after rolling is removed due to the large returning force. Absent. However, a slight shrinkage is preferable in that the article can be tensioned and rolled.

When a base material made of a different material is used for the non-stretched portion and the stretched portion, sufficient interfacial strength is developed in the boundary portion between the non-stretched portion and the stretched portion to prevent breakage at that portion. In order to achieve this, it is necessary that the non-stretched portion contains the same composition as that of the stretched portion in an amount of 30% by weight or more, preferably 50% by weight or more. If it is less than 30% by weight, when the fixing tape is stretched by applying stress, the interfacial strength between the non-stretched portion and the stretched portion is insufficient, so that the tape is broken between the non-stretched portion and the stretched portion. There is a fear.

In the present invention, in order to further improve the interfacial strength between the non-stretched portion and the stretched portion, the cross section of the joint portion between the non-stretched portion A1 or A2 and the stretched portion B is, for example, as shown in FIGS. It is preferable to increase the contact area between the non-extended portion and the extended portion so that the contact portion has an oblique shape or a wedge shape. With such a structure, the stress concentration can be reduced as compared with the structure as shown in FIG. 5, and the overlapping structure as shown in FIG. 4 provides a state in which the overlap portion is slightly elongated after the extension portion is elongated. It becomes difficult to break.

Also, the substantially non-extended portion A1 and / or A2
Is an adhesive, an adhesive to pre-fix it to the article,
Since fixing means such as a locking object (hook-like object) is provided, if the stretchability is too great, the fixed portion may come off due to stretching, so it is preferable that it is difficult to stretch substantially. It is desirable to have an elongation of less than 2 times, especially less than 1.5 times under a load of 1 kg / 25 mm. However, a small amount of elongation is preferable from the viewpoint that the stress concentration at the joint between the stretched portion and the non-stretched portion is absorbed by the slight stretch of the non-stretched portion, and the strength can be maintained.

The thickness of each part of the substrate is not particularly limited,
For example, about 40 to 300 μm for both the non-stretched portion and the stretched portion
This tape is preferable in that it can be wound in a long shape and can be made long. Further, in the present invention, the thickness of the extension portion in the central portion is thinner than the thickness in the vicinity of the boundary between the non-extension portion and the extension portion at both ends, which facilitates the extension by starting the extension from the central portion, It is preferable in that it causes smooth extension.

FIG. 6 is a cross-sectional view showing another example of the stretchable fixing tape of the present invention, in which both ends are substantially non-stretched portions A1 and A2, and the central portion thereof is a stretched portion B. Material 1
Is folded in the elongated portion B once to form a dogleg shape. The inner surface of the non-stretching portion A1 and the non-stretching portion A
The pressure-sensitive adhesive layer 2 is provided on the outer surface of 2, and the release agent layer 3 is provided on the outer surface of the non-extended portion A1 and the inner surface of the non-extended portion A2.

In FIG. 7, both ends of the stretchable base material 1 are substantially non-stretchable portions A1 and A2, and the base material 1 whose central portion is the stretched portion B is the end of the non-stretchable portion A2. It is folded into a square shape. The pressure-sensitive adhesive layer 2 is formed on the inner surface of the non-stretched portion A1 and the outer surface of the non-stretched portion A2, and the release agent is formed on the outer surface of the non-stretched portion A1, the outer surface of the stretched portion B, and a part of the inner surface of the non-stretched portion A2. Layer 3 is provided.

In FIG. 8, both ends are substantially non-stretched portions A1,
A2, the base material 1 whose central portion is the extension portion B is formed in a dogleg shape folded once at the end portion of the non-extension portion A1. The pressure-sensitive adhesive layer 2 is provided on the inner surface of the non-stretched portion A1 and the outer surface of A2, and the release agent layer 3 is provided on the inner surface of the stretched portion B and the inner surface of the non-stretched portion A2.

In FIG. 9, both ends are substantially non-stretched portions A1,
A2, the base material 1 whose central portion is the extension portion B is folded in the extension portion B once to form a dogleg shape. The pressure-sensitive adhesive layer 2 is provided on the inner surface of the non-stretched portion A1 and the outer surface of A2, and the release agent layer 3 is provided on the outer surface of the non-stretched portion A1 and the inner surface of the non-stretched portion A2. A knob piece 5 is provided at the tip of A1 to improve the ease of gripping the tape.

In FIG. 10, both ends are substantially non-extended portion A.
1, A2, a tape in which the base material 1 whose central portion is the extending portion B is not folded, and the non-extending portion A2 has a fixing adhesive layer 2 for fixing it to an article in advance on one surface thereof. The non-stretchable portion A1 is provided with a removable pressure-sensitive adhesive layer 6 for temporary fixing to an article on one surface thereof. The removable pressure-sensitive adhesive layer 6 can be temporarily fixed before use and can be peeled off and re-adhered at the time of use. Further, the release agent layer 3 is provided on the other surface of the non-stretched portions A1 and A2.

In FIG. 11, both ends are substantially non-extended portion A.
1, A2, a tape in which the base material 1 whose central portion is the extended portion B is not folded, and non-extended portions A1 and A
2 is provided with an adhesive layer 2 on one side thereof, and the adhesive layer 2 of A1
A release tape C is provided at a portion contacting with.
The release tape C is for protecting the adhesive layer 2 surface of the non-extendable portion A1 until it is used. The release tape C is fixed to the article through the adhesive layer 2 together with the fixing tape of the present invention. be able to.

In FIG. 12, the release tape C in FIG. 11 has substantially the same length as the base material 1 so that the pressure-sensitive adhesive layer 2 in the non-stretched portion A2 can be protected. Release agent layer 3 so that it can be peeled off again
Is provided, the base material 1 and the release tape C are adhesively fixed to each other without a release agent layer in a portion of the non-extending portion A2 which is in contact with the pressure-sensitive adhesive layer 2.

With this structure, it is possible to absorb the step difference when the fixing tape of the present invention is wound together with the release tape C in a roll shape.

In the present invention, the fixing tape folded into a Z shape as shown in FIG. 1 is temporarily attached to the lower surface of the extending portion B and the inner surface of the non-extending portion A2 facing the extending portion B before use of the tape. It is possible to prevent the Z shape from opening.
The temporary attachment means 4 is not particularly limited, but can be temporarily attached by, for example, a heat seal, a hot melt system, a melt-blown or fibrous pressure-sensitive adhesive or adhesive, an embossing method using a press, or the like.

Each member of the extensible fixing tape of the present invention is not particularly limited as long as it has the above-mentioned characteristics. For example, a polyolefin plastic film such as polypropylene, polyethylene, ethylene propylene rubber, a mixture thereof, or a polystyrene resin. , Polyester-based, urethane-based elastomer films are preferable, and they can be used alone or in combination.

The substrate composed of these substantially non-stretched portions and stretched portions can be produced by a conventionally known method such as T-die or extrusion molding by an inflation method.

The pressure-sensitive adhesive layer is not particularly limited, and examples thereof include rubber type and acrylic type. The release agent layer is also not particularly limited, and silicone type and non-silicone type (long-chain alkyl type etc.) and the like. To be

The extensible fixing tape of the present invention is shown in FIG.
As shown in FIG. 3, for example, when the non-expansion part A2 is fixed to the surface of the diaper with the adhesive layer 2 and the diaper is rolled up after use as shown in FIG.
Can be pulled out and the extension portion B can be further extended and fixed to the diaper.

The extensible fixing tape of the present invention can also be used for bag packaging (FIG. 15) and box packaging (FIG. 16).

[0030]

The present invention will be described below with reference to examples, but the present invention is not limited to these examples.
All the base materials were formed by the T-die extrusion method. Example 1 Linear low-density polyethylene (Ultzex)
2510F, Mitsui Petrochemical Industry Co., Ltd., density 0.93g / cm ³
MFR1.3g / 10min), polypropylene (density)
0.89 g / cm ³ MFR 6.0 g / 10 min) and the above linear low density polyethylene blend (weight ratio 50/50),
Thickness 70μm, width of each part 50mm, total 150m
A base film having a width of m was obtained. A rubber-based pressure-sensitive adhesive having a thickness of 40 μm is applied to both ends (substantially non-extending part) of the base film, and a release agent is applied to the base material portion in contact with the pressure-sensitive adhesive.
As shown in FIG. 1, it was folded into a Z shape to obtain a sample of the adhesive tape for fixing of the present invention.

Example 2 Polyethylene (density 0.92 g / cm ³ MFR 9.0 g / 10
Min), polypropylene in the non-stretched part (density 0.89 g / cm ³ MF
A sample of the adhesive tape of the present invention was obtained in the same manner as in Example 1 except that a blend of R6.0 g / 10 min) and the above polyethylene (weight ratio 50/50) was used.

Example 3 Polyethylene (density 0.92 g / cm ³ MFR 9.0 g / 10
Min), polypropylene in the non-stretched part (density 0.89 g / cm ³ MF
A sample of the adhesive tape of the present invention was obtained in the same manner as in Example 1 except that a blend of R6.0 g / 10 min) and the above polyethylene (weight ratio 20/80) was used.

Comparative Example 1 An adhesive tape sample was obtained in the same manner as in Example 1 except that the non-stretched portion of Example 1 was changed to a blend of polypropylene and linear low density polyethylene (weight ratio 80/20). It was

Comparative Example 2 SEBS (Tuftex H1052, manufactured by Asahi Chemical Industry Co., Ltd.) was used for the stretched portion, and polypropylene (density 0.
A pressure-sensitive adhesive tape sample was obtained in the same manner as in Example 1 except that a blend (weight ratio 50/50) of 89 g / cm ³ MFR 6.0 g / 10 min) and the above SEBS was used.

Comparative Example 3 An adhesive tape sample was obtained in the same manner as in Example 2 except that the substrate thickness in Example 2 was changed to 150 μm.

Comparative Example 4 Linear low-density polyethylene (Ultox
2510F, Mitsui Petrochemical Industry Co., Ltd., density 0.93g / cm ³
MFR1.3g / 10min), polyethylene (density 0.
92 g / cm ³ MFR 9.0 g / 10 min) and the above-mentioned polyethylene blend (weight ratio 50/50) were used, and the substrate thickness was 90 μm.
An adhesive tape sample was obtained in the same manner as in Example 1 except that

The adhesive pressure-sensitive adhesive tape samples obtained in Examples and Comparative Examples were measured for the physical properties of each part under the conditions shown in Table 1 by the following methods, and the results are shown in Table 1. [Elongation] Each sample was cut into a width of 25 mm and a length of 40 mm, a load of each weight was suspended in the vertical direction, and the elongation at that time was measured. The value at this time is L1, and the value in the table is L1.
This is the value given by / 40.

[Permanent Strain] Each sample (width: 25 mm, length: 40 mm) was used at 30 ° C. in an atmosphere of 30 using a tensilon.
The sample was stretched to 200% at a speed of 0 mm / min, and after standing for 3 minutes, the force was released, and after 3 minutes, the length of the sample was measured. If the length at this time is L2, the permanent strain is (L2-4
It is given by 0) / 40 × 100 (%).

[0039]

[Table 1]

[Monitor Test] The adhesive pressure-sensitive adhesive tape samples obtained in Examples and Comparative Examples were attached to a pants-type disposable diaper, and were actually applied to 20 men and 20 women.
Table 2 shows the results obtained according to the following criteria by having a work of rolling a pants-type diaper and stretching and sticking the adhesive tape sample to evaluate its practicality.

○ 30 or more out of 40 answered that it was good △ 10 to 29 out of 40 answered that it was good × 9 out of 40 answered that it was good

[Breaking Test of Substrate] The adhesive pressure-sensitive adhesive tape samples obtained in Examples and Comparative Examples were attached to pants-type paper diapers, and one newspaper was rolled into the diapers. Twenty people actually performed the work of stretching and sticking the adhesive tape sample, and at that time, it was examined whether or not the base material was broken, and the number of broken samples in 40 samples is shown in Table 2.

[Tape Removal] Samples were prepared in the same manner as described above, and 80 samples which were not broken were 4
Forty pieces each were left at 0 ° C., 92% RH and 0 ° C., and after 6 hours, the tape detachment was examined, and the results are shown in Table 2.

[0044]

[Table 2]

[0045]

INDUSTRIAL APPLICABILITY The stretchable fixing tape of the present invention can be easily stretched with a weak force when it is used, and the stretched portion is difficult to shrink, so that it can be rolled up for fastening or packaging. Further, it has an advantage that the length can be arbitrarily adjusted for packaging.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a fixing tape of the present invention.

FIG. 2 is a schematic view when the fixing tape of FIG. 1 is developed.

FIG. 3 is a partially enlarged cross-sectional view showing a joint portion of the base material of the fixing tape of the present invention.

FIG. 4 is a partially enlarged cross-sectional view showing a joint portion of the base material of the fixing tape of the present invention.

FIG. 5 is a partially enlarged cross-sectional view showing a joint portion of the base material of the fixing tape of the present invention.

FIG. 6 is a sectional view showing an example of the fixing tape of the present invention.

FIG. 7 is a sectional view showing an example of the fixing tape of the present invention.

FIG. 8 is a cross-sectional view showing an actual example of the fixing tape of the present invention.

FIG. 9 is a cross-sectional view showing an actual example of the fixing tape of the present invention.

FIG. 10 is a cross-sectional view showing an example of the fixing tape of the present invention.

FIG. 11 is a cross-sectional view showing an actual example of the fixing tape of the present invention.

FIG. 12 is a cross-sectional view showing an actual example of the fixing tape of the present invention.

FIG. 13 is an explanatory diagram showing a usage pattern of the fixing tape of the present invention.

FIG. 14 is an explanatory diagram showing a usage pattern of the fixing tape of the present invention.

FIG. 15 is an explanatory diagram showing a usage pattern of the fixing tape of the present invention.

FIG. 16 is an explanatory diagram showing a usage pattern of the fixing tape of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material A1, A2 Substantially non-expansion part B Extension part 2 Adhesive layer 3 Release agent layer 4 Temporary attachment means 5 Knob piece 6 Adhesive layer for temporary fixing C Release tape

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location A61F 13/15 B65D 63/10 L 13/56 A41B 13/02 M // B65D 63/10 A61F 13 / 18 350 383

Claims (5)

[Claims] 1. A fixing tape in which a fixing means is provided on at least one non-expanding portion of a base material consisting of an extending portion and a substantially non-extending portion, wherein the extending portion is at least 1.5 kg. It should be possible to stretch to a length of 3 times or more under a load of / 25mm, and the permanent strain when stretched 200% should be 30% or more, and the composition of the non-stretched portion should be the same as that of the stretched portion. An extensible fixing tape containing 30% by weight or more. 2. The substantially non-extensible portion has an elongation of less than double under a load of 1 kg / 25 mm.
The extensible fixing tape described. 3. The extensible fixing tape according to claim 1, wherein the fixing means is an adhesive or a lock. 4. The method of claim 1, which is folded at least once.
An extensible fixing tape according to any one of 3 to 3. 5. A base material in which both ends of the base material are substantially non-stretched portions and between them are stretched portions, and the thickness of the stretched portions is smaller than the thickness in the vicinity of the boundary between the non-stretched portions and the stretched portions. The extensible fixing tape according to any one of claims 1 to 4, wherein