JP7143987B2 - Multi-layer underlay tape - Google Patents

Description

The present invention relates to an underlay tape that is temporarily placed between a base material and wallpaper overlapped parts in order to protect the base material when cutting the overlapped part of wallpaper (cloth), More particularly, it relates to a multi-layer underlay tape using a specific material.

2. Description of the Related Art In the interior construction of interior wall surfaces and ceiling surfaces of buildings, a method of attaching wallpaper to the surface of a base material such as a gypsum board has become common. The wallpaper is manufactured in a predetermined width, for example, a 95 cm wide standard product or the like is used. When sticking the standard size product on the base material that will be the wide wall surface or ceiling surface, the wallpaper is joined together and pasted on the base material. At that time, the joint part overlaps the side part of the wallpaper and the side part of the wallpaper adjacent to the wallpaper (overlapping), and in this state, the overlapping part is continuously cut with a knife such as a cutter knife. , Unnecessary wallpaper other than the wallpaper pasted on the base material is removed.

When removing wallpaper by cutting it with a knife, the cutting edge of the knife penetrates the wallpaper, so in order not to damage the base material, put tape between the base materials to protect the base material. Temporary installation is common. The underlay tape is removed from the sides of the spread wallpaper after the wallpaper has been cut.

FIG. 4 shows an example of wallpaper cutting using underlay tape. Adjacent wallpaper 11 and wallpaper overlapping portion 11A of wallpaper 11 are cut by a knife such as a cutter (the cut portion 11B is indicated by a dotted line in FIG. 4(a)). At this time, if the wallpaper overlapping portion 11A is cut as it is, the base material 11 will be damaged, so cutting is performed while the underlay tape 1 is sandwiched between the wallpaper overlapping portion 11A and the base material 10.例文帳に追加.

The wallpaper 11 has a structure in which an adhesive (glue) is applied to the surface to be attached to the base material 10 (the back surface of the wallpaper) so that it can be easily attached to the base material 10. After cutting, the wallpaper 11 can be easily attached. The scraps and underlay tape 1 are removed and the sides of wallpaper 11 are butted against each other.
At this time, when the construction is good, the surface to be the finished surface becomes a smooth surface, and the abutment portion 12 is finished neatly so that it is difficult to distinguish (FIG. 4(b)).

The underlay tape is required to have sufficient flexibility so as not to deteriorate the cutting edge of the knife and not to scrape off the adhesive (paste) of the wallpaper when it is removed.

In addition, if the cut resistance of the underlay tape is insufficient, when cutting the wallpaper, the cutting edge of the blade penetrates the underlay tape and scratches the base material. It appears as a recess and spoils the appearance, and in the case of a deep scratch, the crack becomes a void, resulting in insufficient adhesion of the wallpaper, which may cause the wallpaper to peel off from that part. The tape is required to have sufficient cut resistance.

In order to impart sufficient cut resistance to the underlay tape, various studies have been made on the material, shape, etc. of the underlay tape.

In Patent Document 1, even if a breakage occurs at the edge of the blade in the resin film layer in contact with the wallpaper during cutting by laminating a breakage propagation blocking layer between two resin film layers, the resin film layer contacts the substrate. An underlayment tape is described to prevent transmission to.

Patent Document 2 describes an underlay tape formed by plain weaving a warp made of synthetic resin flat yarn and a weft made of synthetic resin flat yarn thicker than the warp.

Patent Document 3 describes an underlay tape obtained by slitting a sheet of a plain woven fabric having a flat yarn for the warp and a monofilament for the weft with a plastic film laminated on at least one side thereof with a predetermined width in the longitudinal direction.

Patent Document 4 discloses a cloth-like body formed by intersecting a plurality of warps made of synthetic resin and a plurality of wefts made of flat yarn made of synthetic resin, and a cloth-like body laminated on at least one side of the cloth-like body. In the tape substrate formed of a thermoplastic resin film, the weft of the cloth-like body is made thicker than the warp, and the void ratio of the warp and weft is set to a specific range.

Patent Literature 5 describes an underlay tape in which a net-like knitted fabric formed by bonding and fixing intersections of horizontal and vertical synthetic resin fiber threads is adhered to a synthetic resin film.

Patent Document 6 discloses a tape for protecting the base board by placing it under the joint part when the joint part of the cloth stuck on the base board is cut, and is formed of flexible synthetic fibers or natural fibers. An underlay tape is described in which both the front and back sides of a net-like sheet are covered with synthetic resin films, and only the both side edges of the net-like sheet and the front and back synthetic resin films are adhered to each other.

As described above, an adhesive (paste) is applied to the back surface of the wallpaper, but when the underlay tape is temporarily installed, the back surface of the wallpaper comes into contact with the underlay tape. When removing the underlay tape after cutting the overlapped portion of the wallpaper, the adhesive (paste) migrates to the underlay tape, which may reduce the adhesive strength of the wallpaper and cause the wallpaper to peel off from the base material. . Furthermore, in order to deal with such a problem, it is necessary to additionally apply an adhesive (paste) to the back surface of the wallpaper after cutting the overlapped portion of the wallpaper, which may reduce the workability.
The prior art described above is insufficient in terms of the problem of adhesive (glue) migration, and there is room for improvement.

In addition, if the underlay tape 11 is thick, distortion occurs in the vicinity of the overlapped portion 11A during cutting, and as shown in FIG. However, the prior art described above is also inadequate with respect to this problem, and there is room for improvement.

JP 2004-197396 A JP 2008-121249 A JP 2009-248250 A JP 2015-036486 A Utility Model Registration No. 3192127 JP-A-2004-019411

The present invention has been made in view of the above background art, and provides an underlay tape that reduces the amount of adhesive (paste) transferred from the back surface of wallpaper when cutting wallpaper overlapped parts. To provide an underlay tape which hardly causes defective construction in a part.

As a result of intensive studies to solve the above problems, the present inventors have found that in a multilayer type underlay tape in which a net-like sheet is sandwiched between two films and only both ends are adhered, the lower layer film (used By specifying the thickness and material of the film on the side that sometimes comes into contact with the base material), the amount of adhesive (paste) transferred to the underlay tape can be reduced, and workability and wallpaper protrusion after construction can be reduced. The inventors have found that the state of the mating portion can also be improved, and have completed the present invention.

That is, in the present invention, in attaching wallpaper to the surface of a base material, when cutting wallpaper overlapped portions in a state in which the ends of adjacent wallpaper are overlapped, the base material and the wallpaper overlapped portion are cut. A multilayer underlay tape for temporarily installing between and protecting the base material,
The upper layer film is sandwiched between the upper layer film positioned on the wallpaper overlapping portion side during installation and the lower layer film positioned on the base material side during installation in a state in which the net-like sheet is sandwiched. and the lower layer film are adhesively fixed together with the net-like sheet only at both ends,
The net-like sheet is composed of warp yarns substantially parallel to the longitudinal direction of the multilayer underlay tape and weft yarns substantially orthogonal to the warp yarns and crossing the multilayer underlay tape in the width direction,
A multilayer underlay tape is provided, wherein the material of the underlayer film is low density polyethylene (LDPE) or high density polyethylene (HDPE).

In the present invention, in the wallpaper pasting work, when the underlay tape is removed from the wallpaper overlapped portion after cutting the wallpaper overlapped portion, the adhesive (paste) on the back surface of the wallpaper is transferred to the underlay tape (underlay tape (to the upper layer film of the wallpaper), so installation defects due to a decrease in the adhesive strength of the back surface of the wallpaper are less likely to occur. In addition, the work of additionally applying an adhesive (glue) to the back surface of the wallpaper is less likely to be required, and the working efficiency of wallpaper application can be improved.

The multi-layer underlay tape of the present invention has sufficient cut resistance, and the resistance of the weft threads of the net-like sheet can be felt when cutting. It is difficult to cause continuous damage to the underlying material. Also, the multilayer underlay tape of the present invention can be made sufficiently thin.
By using the multi-layered underlay tape of the present invention to apply wallpaper, the butt joints after application are inconspicuous and aesthetically pleasing, and the problem of peeling of the wallpaper is less likely to occur.

FIG. 2 is a diagram showing each member constituting the multilayer underlay tape of the present invention; 1 is a diagram showing a multilayer underlay tape of the present invention; FIG. 1 is a view showing a state in which the multilayer underlay tape of the present invention is wound into a roll; FIG. FIG. 4 is a diagram showing how to use the multilayer underlay tape of the present invention; 1 is a schematic diagram showing a cut resistance measuring device used in Examples. FIG. (a) A state in which the cutting edge of the blade is not pierced into the object to be cut (multilayered underlay tape) (b) The blade edge of the blade is pierced into the object to be cut (multilayered underlay tape) to cut the wound State before starting (c) State after cutting the body to be incised (multilayered underlay tape)

Although the present invention will be described below, the present invention is not limited to the following embodiments, and can be arbitrarily modified and implemented.

FIG. 4 shows how to use the multilayer underlay tape of the present invention. In the multilayer underlay tape 1 of the present invention, when the wallpaper 11 is attached to the surface of the base material 10, when the ends of the adjacent wallpaper 11 are overlapped with each other, when cutting the overlapped wallpaper portion 11A, It is temporarily installed between the base material 10 and the wallpaper overlapping portion 11A and used to protect the base material 10 (Fig. 4(a)). After completing the cutting operation, the multilayer underlay tape 1 is removed.
As described above, when the wallpaper overlapped portion 11A is cut with a knife during the operation of attaching the wallpaper 11, there is a risk that the base material 10 (gypsum board, etc.) may also be cut. By using the multi-layered underlay tape 1, the base material 10 is less likely to be continuously damaged.

The multilayer underlay tape 1 of the present invention is composed of three members, an upper layer film 2, a lower layer film 3 and a net-like sheet 4, as shown in FIG. As shown in FIG. 2, the multilayer underlay tape 1 of the present invention has a net-like sheet 4 sandwiched between the upper film 2 and the lower film 3, and the upper film 2 and the lower film 3 are separated. , and are adhesively fixed together with the net-like sheet 4 only at both ends 1A.

The central portion of the multi-layered underlay tape 1 of the present invention is a non-fixed portion that is not adhesively fixed, and a knife comes into contact with the central portion when cutting the wallpaper. In the central portion, the net-like sheet 4 is not fixed to the films on both sides (the upper layer film 2 and the lower layer film 3), so the weft threads 4A are in a state of being able to move freely. For this reason, the weft thread 4A is pulled in the moving direction of the cutting edge when it comes into contact with the cutting tool, and the feel of it is transmitted to the builder, and it is possible to prevent the base material 10 from being scratched by applying too much force. can be done. Further, even if the base material 10 is damaged, the damage is not a continuous linear damage but a point-like damage, and the problem of peeling of the wallpaper 11 is unlikely to occur.

The width of the multilayer underlay tape 1 of the present invention is preferably 20 mm or more, more preferably 25 mm or more, and particularly preferably 30 mm or more. Moreover, it is preferably 100 mm or less, more preferably 80 mm or less, and particularly preferably 50 mm or less.
If the width is equal to or greater than the above lower limit, even if the vertical positions of the wallpaper 10 are shifted laterally when installing the multilayer underlay tape, the abutting portion 12 can be accommodated within the width of the multilayer underlay tape. Of course, the width of the central portion (unfixed portion) can be sufficiently secured, and the weft thread 4A can be easily pulled, and the above effect can be easily achieved. If the width is equal to or less than the above upper limit, there are merits such as cost advantage; scraping amount of paste from the wallpaper 10 can be reduced;

The thickness of the central portion (unfixed portion) of the multilayer underlay tape 1 is preferably 100 μm or more, particularly preferably 150 μm or more. Moreover, it is preferably 500 μm or less, particularly preferably 350 μm or less.
When the thickness is equal to or less than the above upper limit, the butted portion 12 is less likely to be distorted, and poor construction (swelling near the butted portion 12) is less likely to occur. Further, if the strength of each member is sufficiently maintained, or if embossing is performed to reduce the scraping amount of glue, the thickness is often less than or equal to the above lower limit.

At both ends 1A of the multilayer underlay tape 1, the upper layer film 2 and the lower layer film 3 are adhered and fixed together with the net-like sheet 4 with an adhesive. Examples of adhesives used for adhesively fixing the both ends 1A include acrylic adhesives, epoxy adhesives, polyurethane adhesives, fluorine adhesives, silicone adhesives, vinyl acetate adhesives, and ethylene vinyl acetate adhesives. Adhesives, polyvinyl alcohol-based adhesives, and the like can be exemplified.
Since the back surface of the wallpaper 11 and the base material 10 are generally white in color, by adding a coloring agent to the adhesive on both ends 1A of the multilayer underlay tape 1, the multilayer underlay tape 1 can be visually recognized. It is desirable to add a colorant as it improves the properties and makes it less likely to be forgotten to remove.

The amount of adhesive used for adhesively fixing both ends 1A is preferably 5 g or more, particularly preferably 10 g or more, per 1 m ² of "multilayered underlay tape 1". Moreover, 30 g or less is preferable, and 25 g or less is particularly preferable.
When it is more than the said minimum, when both ends 1A can be fixed firmly and it cut|disconnects with a knife, 4 A of weft threads will become easy to move. If the thickness is less than the above upper limit, it is advantageous in terms of cost, and even if the adhesive is used above the above upper limit, performance such as cut resistance of the multilayer underlay tape 1 will not be improved.

The width of both ends (fixed portions) 1A of the multilayer underlay tape 1 is preferably 1 mm or more, more preferably 2 mm or more, and particularly preferably 3 mm or more. Moreover, it is preferably 10 mm or less, more preferably 8 mm or less, and particularly preferably 7 mm or less.
Within the above range, the both ends 1A can be firmly fixed, and the width of the central portion can be sufficiently secured. It becomes difficult for scratches (especially continuous linear scratches) to form on the surface.

As shown in FIG. 3, the multi-layered underlay tape 1 of the present invention is wound into a roll, stored in a compact state, and cut into a required length at a construction site for use. is desirable.

The upper layer film 2 is a film positioned on the wallpaper overlapped portion 11A side when the multilayer underlay tape 1 is used. That is, since the upper layer film 2 is a film that is in contact with the back surface of the wallpaper 11 on the lower side of the wallpaper overlapping portion 11A (that is, the surface with glue), the upper layer film 2 is difficult for the glue to migrate. It is desirable to configure it so that it is difficult to scrape off.

In the multilayer underlay tape 1 of the present invention, the material for the upper layer film 2 includes low-density polyethylene (LDPE), high-density polyethylene (HDPE), non-stretched polypropylene (CPP), biaxially-stretched polypropylene (OPP), ethylene Polyolefins such as propylene copolymers; polyesters such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate; polyamides such as nylon 6 and nylon 66; acrylic resins;
Of these, it is most suitable to use non-stretched polypropylene (CPP) as the upper layer film 2 in view of the balance between flexibility and workability, as will be described later.

The upper layer film 2 preferably has an uneven structure in order to make it difficult for the glue to migrate. By having the uneven structure, it is possible to reduce the amount of glue on the back surface of the wallpaper 11 that is scraped off.
The method of providing the uneven structure on the upper layer film 2 is not particularly limited, and for example, the uneven structure can be provided by a known embossing technique.

By forming the upper layer film 2 from a highly flexible material such as low-density polyethylene (LDPE) or high-density polyethylene (HDPE), the multilayer underlay tape 1 becomes flexible, and after use the multilayer underlay tape It becomes easier to remove 1, and it becomes easier to reduce the scraping amount of glue.
However, it is difficult to apply embossing to these materials, and the effect of reducing the scraped amount of glue by applying embossing is difficult to achieve.

On the other hand, biaxially oriented polypropylene (OPP) has low flexibility, and a large amount of glue is scraped off when the multilayer underlay tape 1 is removed. The degree is not enough.

On the other hand, unstretched polypropylene (CPP) has low flexibility, but it is easy to form unevenness by embossing. It becomes more difficult to adhere to the film 2. By using unstretched polypropylene (CPP) as the material of the upper layer film 2 and applying embossing, the amount of glue scraped off can be reduced most, resulting in good workability and the state of construction after work. is also good.

The average thickness of the upper layer film 2 (average thickness in a non-embossed state) is preferably 10 μm or more, particularly preferably 15 μm or more. Moreover, it is preferably 100 μm or less, and particularly preferably 50 μm or less.
When the thickness is at least the above lower limit, it is easy to emboss. When the thickness is equal to or less than the above upper limit, the multilayer underlay tape 1 can be made sufficiently thin, the butted portion 12 is less likely to be distorted, and the scraping amount of glue is reduced. Even if the thickness of the upper layer film 2 exceeds the above upper limit, the ease of embossing does not change.

A known embossing machine can be appropriately used for the embossing of the upper layer film 2 . The shape of the embossed portion 2A of the upper layer film is not particularly limited, and examples thereof include the rectangular embossed portion shown in FIG.
It is desirable that the embossed portion 2A protrude toward the back surface of the upper layer film 2 (the surface facing the net-like sheet 4 in the multilayer underlay tape 1) because the amount of glue scraped off can be reduced. .

By subjecting the upper layer film 2 to embossing, the apparent thickness of the upper layer film 2 (thickness measured with a dial thickness gauge as shown in Examples below) is greatly increased, but the upper layer film 2 has a net shape. In the multilayer underlay tape 1, which has a three-layer structure of a sheet 4 and a lower layer film 3, the embossed portion 2A of the upper layer film 2 bites into the net-like sheet 4, so the thickness of the multilayer underlay tape 1 (total thickness) does not increase significantly. Therefore, by providing the embossed portion 2A, it is almost impossible that the butted portion 12 is likely to be defective in construction.

The average apparent thickness of the upper layer film 2 after embossing is preferably 50 μm or more, particularly preferably 100 μm or more. Moreover, it is preferably 200 μm or less, and particularly preferably 150 μm or less.
When the apparent thickness after embossing is at least the above lower limit, the effect of reducing the amount of glue scraped off by providing the embossed portion 2A is likely to be exhibited. When the thickness is equal to or less than the above upper limit, the multilayer underlay tape 1 can be made sufficiently thin, the abutment portion 12 is less likely to be distorted, and the multilayer underlay tape 1 can be easily wound into a long length.

The lower layer film 3 is a film positioned on the substrate 10 side during installation. Since the lower layer film 3 does not come into contact with the back surface of the wallpaper 11, it is not necessary to select the lower layer film 3 in consideration of the ease with which glue adheres. Further, since the lower layer film 3 does not come into contact with the back surface of the wallpaper, it is desirable that it be a flat film that is not particularly processed.

In the multilayer underlay tape 1 of the present invention, the material of the lower layer film 3 is low density polyethylene (LDPE) or high density polyethylene (HDPE).
Glue does not adhere to the lower layer film 3, but by using these materials for the lower layer tape 3, flexibility is imparted to the multilayer underlay tape 1, and the multilayer underlay tape 1 can be easily removed after cutting. Become. That is, as a result of the increased flexibility of the multi-layered underlay tape 1, it becomes easier to reduce the scraping amount of wallpaper paste.

Among the above-described materials applicable to the upper layer film 2, if a material other than low-density polyethylene (LDPE) or high-density polyethylene (HDPE) is used for the lower layer film 3, the multilayer underlay tape 1 will lack flexibility. As a result, when removing the multi-layered underlay tape 1 after cutting, there is a tendency that a large amount of wallpaper paste is scraped off.

The material of the lower layer film 3 may be the same as or different from that of the upper layer film 2 .
As described above, the upper layer film 2 is selected from the viewpoint of ease of adhesive adhesion, while the lower layer film 3 is selected from the viewpoint of flexibility. is preferred.

When the lower layer film 3 is low density polyethylene (LDPE), its average thickness is preferably 16 μm or more, particularly preferably 18 μm or more. Moreover, it is preferably 100 μm or less, and particularly preferably 50 μm or less.
When the lower layer film 3 is high density polyethylene (HDPE), its average thickness is preferably 8 μm or more, particularly preferably 15 μm or more. Moreover, it is preferably 100 μm or less, and particularly preferably 50 μm or less.
When the thickness is equal to or less than the above upper limit, the abutment portion 12 is less likely to be distorted, and the flexibility of the multilayer underlay tape 1 is sufficient, making it easy to reduce the amount of glue scraped off. Moreover, in order to obtain a film with sufficient strength, the thickness is preferably not less than the above lower limit.

The net-like sheet 4 is composed of warp yarns 4B substantially parallel to the longitudinal direction of the multilayer underlay tape 1 and weft yarns 4A substantially orthogonal to the warp yarns 4B and crossing the multilayer underlay tape 1 in the width direction.
When the wallpaper 11 is cut while the multilayer underlay tape 1 is spread, the cutting edge of the blade contacts the weft thread 4A in the central portion (non-fixed portion) of the multilayer underlay tape 1, and the weft thread 4A is cut in the central portion. Since it is not restrained by the films on both sides, it is pulled in the moving direction of the cutting edge and conveys a sense of resistance to the installer.

The net-like sheet 4 is not particularly limited as long as it is composed of warp yarns 4B and weft yarns 4A. For example, a plain weave or leno weave fabric may be used, or the warp yarn 4B and the weft yarn 4A may be bonded without weaving.

When the net-like sheet 4 is a woven fabric, the intersections 4C of the warp threads 4B and the weft threads 4A may or may not be sealed. Examples of sealing agents used in the sealing process include acrylic adhesives, vinyl acetate adhesives, ethylene vinyl acetate adhesives, polyvinyl alcohol adhesives, and the like.

Examples of materials for the yarns (warp yarn 4B and weft yarn 4A) constituting the net-like sheet include nylon, vinylon, polyester, polyethylene, polypropylene, acrylic, aramid, polyarylate, polyparaphenylenebenzbisoxazole, and the like. The materials of the warp yarn 4B and the weft yarn 4A may be the same or different.
Since the weft thread 4A is pulled by a knife, strength is required, and in order to easily convey a sense of resistance to the builder, among the above-mentioned materials, high-strength vinylon, ultra-high molecular weight polyethylene, para-aramid, Polyarylates and polyparaphenylenebenzbisoxazoles are particularly preferred.

Yarns constituting the net-like sheet may be spun yarns, monofilament yarns, or multifilament yarns.
When the weft yarn 4A, which requires strength, is a spun yarn, it is particularly preferable to use a strong stretch-breaking spun yarn.

In the case of filament yarns, the thickness of the yarns forming the net-like sheet is preferably 50 denier or more, particularly preferably 150 denier or more. Moreover, 700 denier or less is preferable, and 500 denier or less is particularly preferable.
In the case of spun yarn, the cotton count of 7 or more is preferable, and 10 or more is particularly preferable. In addition, the number 100 or less is preferable, and the number 50 or less is particularly preferable.
Within the above range, the cut resistance tends to be sufficient. In addition, the thickness of the multilayer underlay tape 1 can be made sufficiently thin, which facilitates the construction. Furthermore, a feeling of resistance is likely to be transmitted to the worker during cutting.

In the net-like sheet 4, the spacing between adjacent threads (the spacing between the warp threads 4B and the spacing between the weft threads 4A) is preferably 1 mm or more, particularly preferably 2 mm or more. Moreover, 10 mm or less is preferable and 7 mm or less is especially preferable.
Within the above range, the builder can easily feel the movement of the weft thread, and the base material 10 is less likely to be scratched (in particular, a continuous linear scratch), and cut resistance is likely to be improved. Also, the thickness of the multilayer underlay tape 1 becomes sufficiently thin. Furthermore, it is economical because the material cost can be suppressed.

The present invention will be described in more detail below with reference to Examples, but the present invention is not limited to these Examples unless it exceeds the gist of the invention.

[Production of multi-layer underlay tape]
A multilayer underlay tape (hereinafter sometimes simply referred to as "tape") was produced as follows.

<Example 1>
Polyester spun yarn (Ne30/1) is used as the warp, and Perlock stretch-break spun yarn (Ne10/1) of Poweron (registered trademark, manufactured by Kuraray Co., Ltd., high-strength vinylon) is used as the weft, to produce a net-like sheet. did. The warp yarns were arranged at intervals of 3 mm and the weft yarns at intervals of 3 mm.
An embossed unstretched polypropylene (CPP) film with a thickness of 20 μm and a width of 35 mm is used as the upper layer film, and a low-density polyethylene (LDPE) film with a thickness of 20 μm and a width of 35 mm (without embossing) is used as the lower layer film. Then, in a state where the net-like sheet is sandwiched between the upper layer film and the lower layer film, 4 mm of both ends of both films are adhered with an acrylic adhesive to prepare a tape T1. Mass was measured.
The thickness of each film and tape T1 was measured with a dial thickness gauge (manufactured by Ozaki Seisakusho Co., Ltd.). The thickness of the tape T1 is the value measured at the central portion (unfixed portion).

<Example 2>
A tape T2 was produced in the same manner as in Example 1, except that the thickness of the low-density polyethylene (LDPE) film was changed to 60 μm.

<Example 3>
A tape T3 was produced in the same manner as in Example 1, except that the thickness of the low-density polyethylene (LDPE) film was changed to 110 μm.

<Example 4>
A tape T4 was produced in the same manner as in Example 1, except that the low-density polyethylene (LDPE) film in Example 1 was changed to a high-density polyethylene (HDPE) film having the same thickness and width.

<Example 5>
A tape T5 was produced in the same manner as in Example 4, except that the thickness of the high-density polyethylene (HDPE) film was changed to 60 μm.

<Example 6>
A tape T6 was produced in the same manner as in Example 4, except that the thickness of the high-density polyethylene (HDPE) film was changed to 110 μm.

<Example 7>
A tape T7 was produced in the same manner as in Example 1, except that the low-density polyethylene (LDPE) film in Example 1 was changed to a biaxially oriented polypropylene (OPP) film having the same thickness and width.

<Example 8>
A tape T8 was produced in the same manner as in Example 7, except that the thickness of the biaxially oriented polypropylene (OPP) film was changed to 60 μm.

<Example 9>
A tape T9 was produced in the same manner as in Example 1, except that the low-density polyethylene (LDPE) film in Example 1 was changed to a non-stretched polypropylene (CPP) film having the same thickness and width.

<Example 10>
Tape T10 was produced in the same manner as in Example 9, except that the thickness of the non-oriented polypropylene (CPP) film, which is the lower layer film (not embossed), was changed to 60 μm. .

[Measurement of wallpaper paste scraping amount]
Using wallpaper coated with 200 g/m ² of adhesive (paste) as a sample, as shown in FIG. After the portion 11A was cut, the removed tape (peeled from the wallpaper 11) was collected and weighed. The amount of change (increase) in the mass before and after the operation was calculated for each tape of 2.7 m, and the amount of change was defined as the amount of glue scraped off.

[Measurement of cut resistance]
(1) Measuring device The cut resistance measuring device shown in Fig. 5 (cut resistance measuring device of "Aspect 2" described in Japanese Patent Application No. 2017-085002) was used to measure the cut resistance of each tape.

A cut resistance measuring device T1 shown in FIG. 5 has a cut object fixing means T11 for horizontally fixing a cut object S, which is a sheet-like object, to a substrate T10. By moving the cutting tool B in the horizontal direction while the cutting tool B is in contact with the cutting target S horizontally fixed to the substrate T10 by the target fixing means T11, the cutting target S can be made resistant to cutting. Test creativity.
The cut resistance measuring device T1 has a blade holder 12 that holds a blade B for cutting an object S to be cut. The blade holder T12 has a holder T16 for holding the blade B. As shown in FIG.
The cut resistance measuring device T1 has a blade holder moving means T15 for horizontally moving the blade holder T12 while bringing the blade edge B1 of the blade B into contact with the object S to be cut. The cutting resistance of the body S to be cut is tested by horizontally moving the cutting tool holder T12 (the cutting edge B1) while the cutting edge B1 of the cutting tool B is in contact with the body S to be cut.
The cut resistance measuring device T1 has a rod-shaped weight holding means T14 having a holder portion T14a, and by changing the number of weights, the load applied by the cutting edge B1 of the blade B to the body S to be cut can be adjusted. (Note that the weight is not shown in FIG. 5).

FIG. 5(a) shows the state before starting the measurement of cut resistance. A cut object S, which is a sheet-like object, is fixed on a horizontally arranged substrate T10 by means of a cut object fixing means T11.
The cutting edge B1 of the cutting tool B is held by the cutting tool holder T12 so as to be positioned above the body S to be cut.
When starting the measurement, the blade holder T12 is vertically lowered by the blade holder moving means T15. As a result, as shown in FIG. 5(b), the cutting edge B1 of the cutting tool B sticks into the body S to be cut.
Next, the blade holder T12 is horizontally moved rightward by the blade holder moving means T15. As a result, the blade B moves horizontally together with the blade holder T12 (the state after the horizontal movement is shown in FIG. 5(c)).
Due to this operation, the body S to be cut receives a constant load from the blade edge B1, and the portion in contact with the blade edge B1 is cut.

(2) Measurement Conditions A gypsum board was used as the substrate T10.
The body S to be incised was prepared by stacking a base paper, each tape, wallpaper (first layer), and wallpaper (second layer) in this order. In addition, in the wallpaper (second layer), the vicinity of the portion where the cutting edge B1 comes into contact was fixed with a ruler. That is, the measurements were made under the same conditions as in the actual cutting of the overlapped wallpaper (Fig. 4(a)), except that the base paper was used (the base paper visualized whether or not the gypsum board was cut). It is sandwiched to make it easier, and it is so thin that it has little effect on cut resistance).

The blade B was a spare blade for a medium-sized cutter manufactured by OLFA Corporation (product number: MBB50K, blade thickness: 0.25 mm), and the angle formed by the blade B and the body S to be cut was set to 30°.
Also, the load applied to the cutting edge B1 (measured by an electronic balance) was adjusted to 629 gf.
The horizontal movement distance of the blade holder T12 (and the cutter knife held thereon) during cutting was 14 cm, and the movement speed was 3 m/min.

(3) Evaluation For each tape and base paper after cutting, the length of the penetrating portion was measured, and the penetrating length L [cm] was calculated as follows.

Immediately after the start of horizontal movement, the initial 4 cm was excluded from the evaluation because it is susceptible to rattling of the device. In addition, since point-like scratches do not pose a problem during construction, the penetration of 3 mm or less, which is the interval between the weft threads, was excluded from the calculation of the penetration length L [cm]. That is, the penetration length L [cm] was defined as the sum of the lengths of the penetration portions exceeding 3 mm, targeting the 10 cm portion excluding the initial 4 cm.
In addition, 100×(L/10) was defined as the penetration rate [%], and evaluation was made according to the following criteria.

5 points: Penetration rate is 0%
4 points: Penetration rate is over 0% and less than 25% 3 points: Penetration rate is 25% or more and less than 50% 2 points: Penetration rate is 50% or more and less than 75% 1 point: Penetration rate is 75% or more and less than 100% 0 Point: Penetration rate is 100%

For each tape (tapes T1 to T10), measurements were made 10 times with the same blade, and the average value was calculated. After 10 measurements, the blade was replaced with a new one, and 10 measurements were taken in the same manner, and the average value was calculated. This measurement was repeated 5 times in total, and the average value for 3 times excluding the maximum and minimum values was calculated and used as the score shown in Table 1.

[Condition of butt part]
Using each tape, construction work was carried out to install a cloth on the wall. After construction, the state of the butted portion was visually observed and evaluated according to the following criteria.

3 points: Beautiful finish with no gaps after butting 2 points: After butting, there is a tendency for the cloth to partially overlap 1 point: After butting, there is a tendency for the cloth to overlap more

(Evaluation results)
Table 1 shows the evaluation results for each tape.

When the thickness of the lower layer film was the same, the amount of adhesive scraped was large in the order of OPP, CPP, HDPE, and LDPE, and the thinner the lower layer film, the smaller the amount of adhesive scraped off.
Moreover, when the thickness of the whole film was thin, the condition of the butted portion could be improved.
Furthermore, when the lower layer film was as thin as 0.02 mm, the cut resistance sometimes deteriorated, but in the case of LDPE, even 0.02 mm showed good cut resistance.

The multi-layer underlay tape of the present invention can be used for interior construction, etc., because the adhesive (paste) on the back surface of the wallpaper is less likely to transfer to the upper layer film, and construction defects are less likely to occur at the butted portion. be.

1 Multi-layer underlay tape 1A Both ends 2 Upper layer film 2A Embossed portion 3 Lower layer film 4 Net-like sheet 4A Weft thread 4B Warp thread 4C Intersection 10 Backing material 11 Wallpaper (cloth)
11A Wallpaper overlapping part 11B Cutting part 12 Butt part T1 Cut resistance measuring device T10 Substrate T11 Cut object fixing means T12 Blade holder T14 Weight holding means T14a Holder part T15 Blade holder moving means T16 Holding part B Blade B1 Cutting edge S Object to be cut θ Cutting angle

Claims (4)

In attaching the wallpaper to the surface of the base material, in a state where the ends of the adjacent wallpaper are overlapped, when cutting the overlapped wallpaper part, there is a temporary gap between the base material and the overlapped wallpaper part. A multi-layered underlay tape for installing in and protecting a base material,
The upper layer film is sandwiched between the upper layer film positioned on the wallpaper overlapping portion side during installation and the lower layer film positioned on the base material side during installation in a state in which the net-like sheet is sandwiched. and the lower layer film are adhesively fixed together with the net-like sheet only at both ends,
The net-like sheet is composed of warp yarns substantially parallel to the longitudinal direction of the multilayer underlay tape and weft yarns substantially orthogonal to the warp yarns and crossing the multilayer underlay tape in the width direction,
A multi-layer underlay tape, wherein the material of said underlayer film is low density polyethylene (LDPE) or high density polyethylene (HDPE). 2. The multilayer underlay tape as set forth in claim 1, wherein the material of said lower layer film is low density polyethylene (LDPE) and has an average thickness of 16 [mu]m or more and 100 [mu]m or less. 2. The multilayer underlay tape according to claim 1, wherein the material of the lower layer film is high density polyethylene (HDPE) and has an average thickness of 8 [mu]m to 100 [mu]m. 4. The multilayer underlay tape according to any one of claims 1 to 3, wherein the material of the lower layer film is different from the material of the upper layer film.

Images