JP2000345114A - Adhesive tape for moisture proof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare an adhesive tape for moisture proof which is used for the sealing construction of root parts of pillars, beams, pipes, or the like, protruding a floor which are mainly located in the vicinity of watery places such as a water supply system when constructing a house, or the like. SOLUTION: This adhesive tape for moisture proof features that a pressure sensitive layer 5 and a release liner 3 are superimposed on one surface of a flexible substrate foam, parallel notches 6 are formed at a defined interval in the direction perpendicular to the flow direction of the tape in one side margin of the tape and a splitting 7 is formed parallel to the flow direction at the central part in the cross direction of the release liner 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-proof pressure-sensitive adhesive tape which is mainly used for hermetically sealing a base portion where columns, beams, pipes, etc., around water are protruding from the floor during construction of a house or the like. In particular, the present invention relates to a moisture-proof pressure-sensitive adhesive tape which can be applied to a beautiful appearance without significant creases and distortions being formed on the tape surface during application.

[0002]

2. Description of the Related Art In recent years, high airtight and highly heat-insulated houses with high energy-saving effects have attracted attention, and various kinds of moisture-proof airtight films and moisture-proof adhesive tapes are generally used when constructing houses. In particular, at the portions where pillars, beams, pipes, etc. protrude from the floor or wall, the roots thereof are coated with an adhesive tape having a flexible and flexible base material as a support so as to easily fit the deformed portion. Sealing has been done. The moisture-proof airtight adhesive tape used for such airtight construction is JIS A
It is required to have a moisture-proof property, strength and durability equal to or higher than that of the moisture-proof film described in 6930 (Housing Plastic Moisture-proof Film).

[0003]

In general, an adhesive tape having a flexible and flexible film base material as a support, which is easy to fit in a deformed portion, is used as a moisture-proof and airtight tape to seal the deformed portion in an airtight manner. When coated, the base film shrinks, leaving only the adhesive layer after application, due to residual distortion of the film, etc., due to the residual strain of the film, which is stretched to fit the entire deformed part. Phenomena,
Often the tape is turned up, stable airtightness,
It is difficult to maintain moisture resistance. In order to avoid such a return phenomenon and curling of the base film, it is necessary to make the thickness of the film about 20 to 50 μm. If it is added, it is easily broken, and good moisture resistance cannot be maintained.

[0004] The present invention solves the above-mentioned problems of the moisture-tight, airtight pressure-sensitive adhesive tape for a substrate, which has been generally used in the past and has a high degree of flexibility. It is an object of the present invention to provide a moisture-proof pressure-sensitive adhesive tape which has an excellent appearance, has sufficient strength, can maintain stable moisture-proof properties, and has a function of fitting to any deformed portion. Things.

[0005]

Means for Solving the Problems The present invention for solving the above problems basically employs a foam film as a base material of an adhesive tape, and forms a cut in an adhesive tape portion having the base material. It is characterized by providing
The following inventions are included.

(1) Notches parallel to the tape flow direction at predetermined intervals are formed on one side of an adhesive tape provided with an adhesive layer and a release liner on one side of a flexible foam film base material. A moisture-proof adhesive tape, which is provided.

(2) The moisture-proof pressure-sensitive adhesive tape is characterized in that a continuous spine parallel to the flow direction of the tape is applied to a substantially central portion in the width direction of the release liner portion.
(1) The moisture-proof adhesive tape according to the above (1).

(3) The flexible foam film substrate has a thickness of 0.2 mm to 2.0 mm and a width of 50 mm to 15 mm.
The moisture-proof pressure-sensitive adhesive tape according to item (1) or (2), which is a polyolefin foam film having a flexibility of 0 mm.

(4) The moisture-proof polyolefin foam film according to any one of (1) to (3), wherein the highly flexible polyolefin foam film is a foam film having a closed cell structure. Adhesive tape. (5) The flexible polyolefin foam film is characterized in that it is a foam film having an independent fine cell structure that is foam-formed by an electron beam irradiation method,
The moisture-proof adhesive tape according to any one of (1) to (4).

(6) The cut provided in the adhesive tape is 1/6 to 1 of the entire width of the tape from one edge of the adhesive tape.
The moisture-proof pressure-sensitive adhesive tape according to any one of (1) to (5), wherein the pressure-sensitive adhesive tape is provided in parallel with each other at a length of / 2 and at an interval of 10 mm to 80 mm. (7) The continuous spine splitting process in the widthwise substantially central portion of the release liner portion parallel to the flow direction of the adhesive tape is at least 5 mm closer to the other side of the adhesive tape from the tip of the cut provided in the adhesive tape. The moisture-proof pressure-sensitive adhesive tape according to any one of (1) to (6), wherein

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The moisture-proof adhesive tape 1 of the present invention comprises:
As shown in FIG. 1 of the accompanying drawings, the pressure-sensitive adhesive tape 1 comprises a pressure-sensitive adhesive layer 5 and a release liner 3 such as release paper on one side of a flexible foam film substrate 4. It has a structure in which cuts 6, 6 parallel to each other are provided on one side in the width direction of the tape. The notch 6
FIG. 1 shows an example in which the entirety of the adhesive tape portion 2 and the release liner portion 3 is provided, but the cut 6 may be provided only in the adhesive tape portion 2 excluding the release liner 3.

The flexible foam film substrate used for the moisture-proof pressure-sensitive adhesive tape of the present invention is not particularly limited as long as it is rich in flexibility and can maintain a sufficient moisture-proof property. Foamed films such as polyethylene and polypropylene are preferably used. As polyolefin foam films having such properties, there are foam films having fine closed cells which are foamed by electron beam irradiation, and these polyolefin foam films have excellent skin strength, shear strength, and moisture resistance. Not only is it excellent in resistance to external forces and heat insulation, it is also chemically stable, does not deteriorate over a long period of time, has excellent chemical and solvent resistance, and has flexibility even at low temperatures. It is desirable because it does not impair. Further, as the foam film base material, one obtained by further laminating a flexible plastic film such as a polyolefin film on the foam film surface can be used.

The thickness of the foam film substrate is not particularly limited as long as a moisture-proof adhesive tape having the above-mentioned characteristics can be formed. From the purpose of use of the ordinary moisture-proof adhesive tape, the thickness is 0.2 mm to 2.0 mm, and the width can be arbitrarily set according to the purpose of use, but for normal use, a width of 50 mm to 150 mm is used. used.

The pressure-sensitive adhesive layer of the moisture-proof pressure-sensitive adhesive tape of the present invention maintains a stable pressure-sensitive adhesive performance over a long period of time, has a small change in the pressure-sensitive adhesive performance even at low and high temperatures, and has a wide operating temperature range. Can be used without particular limitation as long as it can be provided thickly and has excellent adhesion to rough surfaces such as columns. Among such adhesives, those containing butyl rubber as a base elastomer are preferred.
Butyl rubber is excellent in weather resistance, ozone resistance and chemical resistance because it has few unsaturated double bonds and is chemically stable. Further, since it has the lowest gas permeability of about 1/25 that of natural rubber among general-purpose rubbers, it is excellent in airtightness and is an optimal polymer for moisture-proof use.

Since butyl rubber has a cold flow property, so-called "glue dripping" may occur. Therefore, by blending a material having a crosslinking component with an adhesive and crosslinking the butyl rubber, good adhesiveness can be obtained. It can be used as a pressure-sensitive adhesive having moderate cohesiveness. When the cohesiveness is imparted in this way, it is possible to minimize the return of the support after the application. The thickness of the pressure-sensitive adhesive layer is not particularly limited, and is usually 0.10 mm or more, preferably 0.2 mm or more.

The moisture-proof adhesive tape of the present invention can be cut into an adhesive tape portion and split into a release liner portion so that a contractor can fit it to a work site reliably and without gaps by hand. And has been given. As shown in FIG. 1, in the moisture-proof adhesive tape 1, the notch 6 is formed on one side of the tape in parallel with a predetermined interval in the length direction from the edge and a predetermined length in the width direction. It is provided on both the tape portion 2 and the release liner portion 3. However, the notch 6 may be provided only in the adhesive tape 2 portion and not in the release liner portion.

The length of the cut 6 is preferably in the range of １ ／ to の of the tape width, and is appropriately selected within the range according to the purpose of use. The interval between the cuts 6 is appropriately set within a wide numerical range according to the purpose of use of the moisture-proof adhesive tape 1, but is generally from 10 mm to 8 mm.
It is about 0 mm.

The back splitting portion 7 provided only on the release liner portion 3 is more than the end of the cut 6 provided on the adhesive tape portion with which the release liner portion abuts in order to ensure the leakage prevention function. The release liner 7 is provided at a position of 5 mm or more on the other side by cutting the release liner 7 in parallel with both sides of the tape or by processing the release liner 7 so that it can be cut.

The construction procedure at the construction site of the moisture-proof adhesive tape of the present invention is as follows. Cut off the moisture-proof adhesive tape 1 by a required length. Along the back cracking line 7 of the release liner portion 3, the moisture-proof pressure-sensitive adhesive tape 1 is folded in two with the release liner portion facing outward, and the release liner 3 at the portion (2b) without a cut is first peeled off, and FIG. As shown in FIG. 3, it is attached to, for example, a wall surface (reference numeral 8 in FIG. 2 or reference numeral 9 in FIG. 3) of the construction site. Next, the release liner part 3 of the cut part (2a) is peeled off, and the cut part 2a is stretched and adhered to the floor (or ceiling or the like) part 10 of the construction site while being extended. In this way, applying the spine splitting to the release liner not only makes it easy to stick and position the spine split on the boundary between the column and the floor, but also makes the adhesive surfaces contact each other during the application. It is possible to prevent troubles.

As is apparent from FIGS. 2 and 3, in the case of the moisture-proof adhesive tape of the present invention, the cut 6 provided on the adhesive tape is the adhesive tape portion of the adhesive tape 1 on which the cut 6 is provided. Since 2a can be uniformly spread radially with a small force on the floor at the base portion of a pillar or the like, the residual distortion of the adhesive tape portion 2a after being adhered to the floor portion can be suppressed. Since the cuts provided are uniform in length, the stretched and affixed portion 2a is stretched by a uniform force, so that stress distortion is also diffused evenly. As a result, even if the workers are different, the finished state is always constant, and it is possible to reduce the variation in construction. Further, since a foam having a higher skin strength is used as the tape base material, no destruction occurs even when the tape is stretched during construction.

FIG. 4 shows a state in which a moisture-proof adhesive tape having no cut in the adhesive tape portion 2 is provided around the pillar, unlike the case of the moisture-proof adhesive tape of the present invention. The adhesive tape is radially stretched, but must be stretched farther away from the pillar. Actually, when winding and sticking on a 105 mm square pillar used for general construction, the tape needs to be stretched almost twice. When such a construction is used, even if a flexible tape is used as the support, after the construction shown in FIG. 4, not only the support is contracted due to the residual strain, but also the tape is turned up, The elasticity of the tape support makes it difficult to stretch it evenly and radially.

[0022]

EXAMPLES Example 1 As a tape base material, a polyolefin-based foam ("Torepef" manufactured by Toray Co., Ltd., closed cell structure, expansion ratio 5 times, thickness 0.
8mm) A tape is prepared and a non-solvent pressure-sensitive adhesive mainly composed of butyl rubber is applied as a pressure-sensitive adhesive to a thickness of 0.3 mm with a calender roll, and then a single-sided silicone-coated release liner having the same dimensions as the tape base material. ("RHB80
M white ”, manufactured by San-A Kaken), 150 mm
Slit to width. Next, cuts having a length of 60 mm are provided on one side of the tape at right angles to the flow direction of the tape at intervals of 30 mm, and a further 7 mm is formed from the other side of the cut side.
A release liner at a position of 0 mm was subjected to spine splitting in parallel with the tape flow direction to obtain a moisture-proof adhesive tape of the present invention.

The general properties of the moisture-proof pressure-sensitive adhesive tape of the present invention produced according to the above procedure are shown in Table 1. Table 2 shows comparison data of the performance standard value of JIS A6930 and the moisture-proof performance of the moisture-proof pressure-sensitive adhesive tape of the present invention described in Example 1. From Table 1, the moisture-proof pressure-sensitive adhesive tape of the present invention has excellent tensile strength and is easily extensible.
It can be seen that the workability is excellent. Table 2 shows that the moisture-proof adhesive tape of the present invention has excellent moisture-proof performance.

[Table 1]

[0024]

[Table 2]

Comparative Example 1 The same tape base material as in Example 1 was coated with the same pressure-sensitive adhesive, and was used as a moisture-proof pressure-sensitive adhesive tape without cutting or splitting. Comparative Example 2 A polyethylene film (thickness of 60 μm) was used as a tape base material.
m) was prepared and processed in the same manner as in Example 1 to form a moisture-proof adhesive tape.

Each of the moisture-proof adhesive tapes formed according to the procedure of Example 1, Comparative Example 1 and Comparative Example 2 was cut to a length of 200 mm, and cut on a plywood floor from which a 11/2 inch pipe protruded. It was installed in the gap between the floor surface on which the moisture-proof sheet was laid and the pipe wall, and the finished state after construction of each moisture-proof adhesive tape was evaluated by visual observation. Table 3 shows the results.

[0027]

[Table 3]

As is clear from Table 3, the adhesive tape for moisture-proofing of the present invention can easily adhere the adhesive tape to the floor surface and the wall surface of the pipe, and even if different operators produce different results. A hermetically sealed chain is formed that has no beautiful appearance. On the other hand, in Comparative Examples 1 and 2, the floor portion was not stuck neatly, peeled off with time, and turned up.

[0029]

As is clear from the above description, the moisture-proof pressure-sensitive adhesive tape of the present invention has a beautiful appearance without causing the base film to return or turn up, and has sufficient strength. Since it is a moisture-proof adhesive tape that can maintain stable moisture-proof properties and can fit any deformed part, pillars, beams, pipes, etc. around the water at the time of house construction are separated from the floor and walls. Provided is a moisture-proof pressure-sensitive adhesive tape which can cleanly seal a protruding root portion and the like.

[Brief description of the drawings]

FIG. 1 is a partially enlarged perspective view of a moisture-proof adhesive tape of the present invention.

FIG. 2 is a diagram showing the construction of a hermetically sealed chain around a pipe using a moisture-proof adhesive tape.

FIG. 3 is a construction drawing of a hermetically sealed corner portion using a moisture-proof adhesive tape.

FIG. 4 is a construction diagram of a hermetically sealed chain around a pipe using a moisture-proof adhesive tape having no cut.

[Explanation of symbols]

1: Moisture-proof adhesive tape, 2: adhesive tape portion, 3: release liner, 4: foam base material, 5: adhesive layer, 6: cut portion, 7: back split portion, 8, 9: wall portion, 10: Floor part

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DA01 DB01 DC02 DD01 FA01 FA02 GA23 GA76 HD01 HD08 HD11 HE01 LA17 4J004 AA05 AA07 AB01 CA04 CB04 CC02 DB02 DB05 FA10

Claims (4)

[Claims] 1. A notch parallel to a tape at predetermined intervals at one side of a moisture-proof adhesive tape provided with an adhesive layer and a release liner on one side of a highly flexible foam base material. A moisture-proof pressure-sensitive adhesive tape, characterized in that a continuous spine splitting process is provided substantially parallel to the flow direction at a substantially central portion in the width direction of the release liner portion. 2. The flexible foam base material is a polyolefin foam film having a thickness of 0.2 mm to 2.0 mm and a width of 50 mm to 150 mm,
The moisture-proof adhesive tape according to claim 1. 3. The cut provided in the adhesive tape portion is 1/6 to 1 of the entire width of the tape from the side edge of the adhesive tape.
The moisture-proof pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive tape is provided with a length of / 2 and an interval of 10 mm to 80 mm. 4. A spine splitting process provided substantially parallel to a flow direction at a substantially central portion in a width direction of the release liner portion is performed by cutting from a leading end portion of a cut provided in the adhesive tape portion.
The moisture-proof pressure-sensitive adhesive tape according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive tape is provided near the other side of the pressure-sensitive adhesive tape part by at least mm.