JP3167932B2 - Sheet-shaped airtight material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, in the fields of houses, buildings, and the like.
Airtightness at the boundary between adjacent members at an angle in the structure, such as corners, around windows, around columns and beams, between wall materials, between wall materials and ceiling materials・ This is related to a sheet-like airtight material used to enhance watertightness.

[0002]

2. Description of the Related Art In a building field such as a house, a space between an opening of a floor or the like and a pipe, an outside corner, an inside corner, around a window, around a column or a beam,
For the purpose of hermetically sealing structures such as between wall materials and between wall materials and ceiling materials, punched products of foam with an adhesive layer formed on one or both sides, molded products with openings An adhesive sheet or mat having an adhesive layer formed on one side of a material is used. In addition, a method is employed in which a moisture-proof sheet is cut in accordance with the shape, and the sheet is attached with a general adhesive tape.

[0003]

However, since there are various types of boundaries between members adjacent to each other at an angle in the above-mentioned structure, when a punched product or a molded product is used, the various types of components are used. It is necessary to prepare a plurality of shapes that match the site. In addition, since specifications of each house vary, it is not easy to prepare and manage required shapes and required quantities. On the other hand, in the method using adhesive sheets, mats, or moisture-proof sheets and tapes, work such as cutting and pasting must be performed according to the shape of each part at the work site, which increases the burden on the worker and increases the work load. Variations in the politeness of construction tend to occur depending on the skill of the worker. In addition, it is not advisable to apply sheets and mats in an overlapping manner because they have a problem in appearance and cause difficulty in finishing.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and can be easily and easily performed by using a single member regardless of its shape in various places. It is an object of the present invention to provide a member whose finish can be aesthetically airtight and watertight. That is, the present invention
An elongation characterized in that an adhesive layer is laminated on one surface of the extensible holding layer, and the elongation at break of the laminate is 100% or more, and the permanent set when stretched by 100% is 20% or more. It relates to a possible sheet-like hermetic material.

In the present invention, when such an extensible sheet-like hermetic material is used for a boundary portion between members which are adjacent to each other at an angle in the above-mentioned various structures, the sheet or the tape may be used. By sticking to one member in a normal state, and then sticking it to the other member in a stretched state according to an appropriate shape, airtightness and watertightness can be easily achieved without occurrence of floating etc. it can.

The present invention can provide a sheet-like hermetic material excellent in rough surface adhesion, low-temperature adhesion, and durability by using a butyl rubber-based or rubber as-based pressure-sensitive adhesive as the pressure-sensitive adhesive layer.

The present invention also relates to the above-mentioned sheet-shaped airtight material, wherein the pressure-sensitive adhesive layer is further wound in a tape-like state with the surface of the pressure-sensitive adhesive layer being covered with a release liner, and is folded so that the release liner side faces outward. In the state of a tape wound in a state where the adhesive layer is wound so that the release liner is provided with a score line in the winding direction, or in a state where the adhesive layer is bent outward, A tape-shaped material wound via a release liner, an adhesive layer is laminated on both ends except the substantially central portion of the holding layer, and the adhesive layer is folded around the substantially central portion so that the adhesive layer is on the outside. While being bent, both adhesive layers are wound in a tape-like state via a release liner, or the opposite side of the holding layer on which the adhesive layer is laminated is subjected to a release treatment. Tape-like extension with the outside facing It relates ability sheet-like gas-tight material.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings, but the present invention is not limited to these embodiments. FIG. 1 is a cross-sectional view showing a specific example of the sheet-shaped airtight material of the present invention. Reference numeral 1 denotes an extensibility holding layer, on which an adhesive layer 2 is laminated, and the surface of the adhesive layer 2 is required. Is covered with a release liner 3. In the present invention, the elongation at break of the laminate A comprising the extensibility holding layer 1 and the pressure-sensitive adhesive layer 2 is 100% or more, and
The permanent set when stretched by 0% is set to 20% or more.

If the elongation at break of the laminate A is less than 100%, the sheet is torn or cut when stretched and bonded at the time of application to a cubic curved surface or a corner portion of the sheet-like airtight material. However, there is a problem that the desired airtightness and watertightness cannot be secured. Further, from the viewpoint of workability, the elongation at break is preferably 200% or more. Also, if the permanent set when stretched 100% is less than 20%,
After bonding while stretching, residual stress is generated in the sheet, causing problems such as peeling of the sheet over time.
Further, from the viewpoint of workability, it is preferable that the permanent set when stretched 100% is 30% or more, and when the stretch is 200%, the permanent strain is 30% or more, particularly 50% or more.
The values of the elongation at break and the permanent strain are obtained by the methods described in Examples described later.

A specific example of the extensibility holding layer 1, which is one of the constituent members of the laminate A, is not particularly limited as long as the laminate A with the pressure-sensitive adhesive layer 2 described below has the specific physical properties and functions as described above. Although not described, for example, polyvinyl chloride (PV
C) -based films or polyolefin-based plastic films consisting of random polypropylene, low-density polyethylene, linear low-density polyethylene, etc., alone or as a blend; other styrene-based, polyester-based, urethane-based elastomer films, and fibrous forms thereof Woven or nonwoven fabrics can also be used. In addition, the thickness of the extensibility holding layer 1 is not particularly limited as long as the laminate A has the specific physical properties and functions as described above, and is appropriately determined according to the use situation.

Specific examples of the pressure-sensitive adhesive layer 2 to be laminated on one surface of the extensibility holding layer 1 are not particularly limited as long as the laminate A has the specific physical properties and functions as described above. Can be used, and may be appropriately selected according to the material of the adherend such as wood, polyethylene (PE) film, polyvinyl chloride (PVC) pipe, metal, and the like. For example, butyl rubber, rubber as, acrylic, Styrene-butadiene rubber (SBR), natural rubber (N
R) -based, nitrile rubber (NBR) -based, and blend-based rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. In the present invention, especially low-temperature adhesion,
From the viewpoints of rough surface adhesion and durability, butyl rubber-based and rubber as-based pressure-sensitive adhesives are preferred. In addition, known additives such as a crosslinking agent, a tackifier, an antioxidant, a stabilizer, a filler, and a pigment may be added to the pressure-sensitive adhesive, if necessary.

The thickness of the sheet-like airtight material of the present invention is not particularly limited as long as it has the specific physical properties and functions as described above. 5 μm to 2 mm, preferably 20 μm
m to 1 mm. If the thickness is too thin, this sheet is stretched and used, so the original purpose of airtightness may be lost in the stretched thin part.On the other hand, if the thickness is too thick, the step at the overlapped part becomes large. It may not be preferable.

The release liner used as required in the present invention is not particularly limited as long as it has a structure that protects the surface of the pressure-sensitive adhesive layer 2 and has a structure that can be peeled off when the pressure-sensitive adhesive surface is exposed. Instead, those conventionally used are used. Examples of such a release liner include a release liner obtained by forming a silicone-based release agent or a long-chain alkyl-based release agent on a base material such as paper or a plastic film. The thickness of the release liner is not particularly limited as long as the workability at the time of peeling the release liner is not difficult, but is preferably 5 to 200 μm, and more preferably 10 to 30 μm. As the release liner, either a type in which a release agent is treated on one side of a substrate or a type in which a release treatment is performed on both sides can be used.

FIG. 2 is a schematic partial cross-sectional view showing another example of the sheet-like airtight material of the present invention, and shows the surface of the pressure-sensitive adhesive layer 2 of a laminate A comprising an extensible holding layer 1 and a pressure-sensitive adhesive layer 2. Is wound in a state covered with a release liner 3 to form a tape B. Further, the release liner 3 is provided with a score line 4 in the winding direction at a substantially central portion thereof as required. By providing the cutting line 4, when actually using the present sheet-shaped airtight material, one of the release liners is first peeled off, a part of the present sheet is bonded to one of the members, and then the remaining release liner is peeled off. The remaining portion of the sheet can be attached to the other member while being stretched according to the shape of the adherend, so that the workability can be improved and the finish can be beautiful.

FIG. 3 is a schematic partial cross-sectional view showing another example of the sheet-shaped airtight material of the present invention, and shows the surface of the pressure-sensitive adhesive layer 2 of a laminate A including an extensible holding layer 1 and a pressure-sensitive adhesive layer 2. Is covered with a release liner 3, and is wound in a state of being bent so that the release liner 3 side is on the outside, to form a tape B. Also in this case, the operability can be further improved by providing the score line 4 in the winding direction substantially in the center of the release liner 3. 2 and FIG. 3 can be appropriately set as, for example, all cuts, notches, or perforations.

FIG. 4 is a schematic partial cross-sectional view showing another example of the sheet-shaped airtight material of the present invention. An adhesive layer 2 is provided on the entire surface of one side of an extensible holding layer 1. Is folded so that the pressure-sensitive adhesive layer 2 is on the outside, and is wound with a release liner 3 on both sides of which is subjected to a release treatment. With this configuration, when bonding to various deformed portions and curved surface portions, the tape is rewound from the wound body, and at the same time, a part of the adhesive layer is exposed and can be directly bonded to the adherend. Further, there is an advantage that the workability can be further improved and the amount of the release liner that becomes waste after use can be reduced.

FIG. 5 is a schematic partial cross-sectional view showing another example of the sheet-shaped airtight material of the present invention. The pressure-sensitive adhesive layers 2 are provided at both ends of the extensible holding layer 1 except for the substantially central portion on one side. The pressure-sensitive adhesive layer 2 is bent so that the pressure-sensitive adhesive layer 2 is on the outer side with a substantially central portion where the extensibility holding layer 1 is a non-adhesive layer as a fulcrum. It is wound in a state interposed between them. With this configuration, since the pressure-sensitive adhesive layer is not exposed at the bent portion, there is an advantage that unnecessary substances such as dust do not adhere.

FIG. 6 is a schematic partial cross-sectional view showing another example of the sheet-like hermetic material of the present invention. The adhesive layer 2 is provided on the entire surface of one side of the extensible holding layer 1. A release treatment layer 5 is provided on the other surface, and is wound into a tape shape with the release treatment layer 5 facing outward. With such a structure, when the tape is bonded, the tape is rewound from the wound body, and at the same time, a part of the adhesive layer is exposed, and the tape can be bonded to the adherend as it is, thereby further improving workability. In addition, there is an advantage that there is no need to provide a release liner that becomes waste after use.

The release treatment layer 5 is not particularly limited as long as it is for protecting the pressure-sensitive adhesive layer without using a release paper or the like. For example, a known release agent such as a silicone-based or long-chain alkyl-based release agent is used. Things are used.

[0020]

EXAMPLES Next, the sheet-like hermetic material of the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. Example 1 A polyethylene film (0.02
butyl rubber-based pressure-sensitive adhesive (0.7 mm thick) on one side of this holding layer, and a release liner (one coated with a silicone-based release agent on one side of high-quality paper) (thickness 15 mm).
μm) and a tape (70 mm width) as shown in FIG. 2 was used as a sample of the present invention.

Example 2 A polyethylene film (0.05%) was used as the stretch holding layer.
butyl rubber-based pressure-sensitive adhesive (0.5 mm thick) on one side of this holding layer using a release liner (Example 1).
3) and wound in a state of being bent so that the release liner side is on the outside, and formed into a tape shape (70 mm width) as shown in FIG. 3 to obtain a sample of the present invention.

Example 3 A polyethylene film (0.02
(thickness: 0.5 mm), a rubber adhesive (0.5 mm thick) is applied to one side of the holding layer, and the adhesive layer is bent so that the pressure-sensitive adhesive layer is on the outside. As shown in FIG. 4, a release liner (same as in Example 1) )
Together with a tape (70 mm width) was used as a sample of the present invention.

Example 4 A polyethylene film (0.05%) was used as the stretch holding layer.
(thickness), an acrylic pressure-sensitive adhesive (0.05 mm thick) was applied to one surface of this holding layer, and the other surface of the holding layer was peeled off with a silicone release agent to form a tape as shown in FIG. The sample (70 mm width) was used as a sample of the present invention.

Comparative Example 1 A sample was obtained in the same manner as in Example 2 except that the stretchable holding layer was made of polyethylene / polyethylene terephthalate (PET) synthetic fiber (0.15 mm thick).

COMPARATIVE EXAMPLE 2 Polyvinyl chloride (0.3 mm thick) was used as an extensible holding layer, and a natural rubber-based adhesive (0.13
(thickness: 70 mm), and the holding and other surfaces are subjected to a release treatment with a silicone-based release agent to form a tape as shown in FIG.
mm width) was used as a sample.

The physical properties of the samples obtained in Examples and Comparative Examples were measured by the following methods, and the results are shown in Table 1.

[0027]

[Elongation at Break] Each sample was cut to a width of 25 mm, and was subjected to 500 mm /
The film was stretched at a minute pulling speed until breaking, and the elongation at that time was measured and calculated by (length after elongation−initial length) / (initial length) × 100 (%).

[Permanent strain] Each sample was cut into a 25 mm width, and 500 mm /
100% elongation at a pulling speed of 1 minute, release the force after 3 minutes, measure the residual strain, and calculate by (length after standing-initial length) / (initial length) x 100 (%) did.

[Monitor Test] The samples obtained in the examples and the comparative examples were actually used by the 20 installers at the sites shown in FIG. 7 to evaluate the practicality. The results are shown in Table 2. The meanings of the symbols in Table 2 are as shown below. ◎ Eighteen or more out of 20 answered that they were good. ○ 15 or more and less than 18 out of 20 responded that they were good. △ 5 to less than 15 out of 20 respondents answered that they were good. × Less than 5 out of 20 responded as good.

[0031]

[0032]

The stretchable sheet-like hermetic material of the present invention comprises:
When used, it can be arbitrarily and easily stretched and pasted in a shape corresponding to various deformed parts and curved parts, and the stretched part is hard to shrink, so it does not easily peel off over time It has the advantage that.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a sheet-shaped airtight material of the present invention.

FIG. 2 is a schematic partial cross-sectional view showing an example of a sheet-shaped airtight material of the present invention.

FIG. 3 is a schematic partial cross-sectional view showing an example of a sheet-shaped airtight material of the present invention.

FIG. 4 is a schematic partial cross-sectional view showing an example of the sheet-shaped airtight material of the present invention.

FIG. 5 is a schematic partial cross-sectional view showing an example of a sheet-shaped airtight material of the present invention.

FIG. 6 is a schematic partial cross-sectional view showing an example of the sheet-shaped airtight material of the present invention.

FIG. 7 is a schematic view showing an example of a use state of the sheet-shaped airtight material of the present invention.

[Explanation of symbols]

 1 extensibility holding layer 2 adhesive layer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI E04B 1/64 E04B 1/64 D E04D 3/38 E04D 3/38 C (58) Fields surveyed (Int.Cl. ⁷ , DB Name) B32B 1/00-35/00 C09J 7/02 C09K 3/10 E04B 1/64 E04D 3/38

Claims (8)

(57) [Claims] 1. A pressure-sensitive adhesive layer is laminated on one side of an extensible holding layer, and the elongation at break of the laminate is 100% or more, and the permanent set when stretched 100% is 20% or more. An extensible sheet-shaped airtight material characterized by the following. 2. The stretchable sheet-like hermetic material according to claim 1, wherein the pressure-sensitive adhesive layer is made of a butyl rubber-based or rubber-based pressure-sensitive adhesive. 3. The extensible sheet-like hermetic material according to claim 1, wherein the pressure-sensitive adhesive layer is wound into a tape shape while being covered with a release liner. 4. The extensible sheet-like hermetic material according to claim 3, which is wound in a state of being bent so that the release liner side faces outward. 5. The extensible sheet-like hermetic material according to claim 3, wherein a score line is provided in a winding direction of the release liner. 6. The extensible material according to claim 1, wherein the pressure-sensitive adhesive layer is wound to form a tape through a release liner in a state where the pressure-sensitive adhesive layer is bent to the outside. Sheet airtight material. 7. A pressure-sensitive adhesive layer is laminated on both ends of the holding layer except for a substantially central portion, and the pressure-sensitive adhesive layer is bent such that the pressure-sensitive adhesive layer is located outside the substantially central portion as a fulcrum. The stretchable sheet-like hermetic material according to claim 1 or 2, wherein the stretchable sheet-like airtight material is wound into a tape shape via a release liner. 8. The surface of the holding layer on the side opposite to the side on which the pressure-sensitive adhesive layer is laminated is subjected to release treatment, and is wound into a tape shape with the release treated surface facing outward. Stretchable sheet-shaped airtight material.