JP2010196421A - Sound absorbing decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin sound absorbing decorative sheet, having sound absorbing property without a rear air layer, and also having incombustibility required for a building material. <P>SOLUTION: This sound absorbing decorative sheet 1 includes a decorative film layer 110 which comprises a film layer 100 and a first adhesive agent layer 102 laminated on each other, with fine holes having a diameter of 20-500 μm and a number density of 2-700/cm<SP>2</SP>formed therein, an incombustible continuous foam body layer 104 having a thickness of 0.5-9.0 mm, and a second adhesive agent layer 106. The decorative sheet is installable by merely stamping on the wall surface, ceiling surface, floor surface, or partition of a building. The decorative sheet has an aesthetic appearance for decoration. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a decorative sheet having sound absorption.

  A decorative sheet is used as a skin material for a wall, ceiling, or floor of a building. In addition, in order to give soundproofing performance to these wall surfaces and the like, a sound-absorbing decorative board in which a decorative board is laminated on a sound-absorbing material such as a sound-absorbing panel is used.

  In general, it is necessary to have a certain amount of air layer (back air layer) on the opposite side (back) of the sound absorbing material to the sound source in order to obtain a sound absorbing effect. Therefore, in a conventional sound absorbing material such as a sound-absorbing decorative board or a sound-absorbing sheet, a predetermined back air layer is provided behind the sound-absorbing material (for example, Patent Document 1), or the sound-absorbing material itself is thickened to obtain a sound-absorbing effect. (For example, Patent Document 2 or Patent Document 3).

JP-T-2002-521722 JP 7-324400 A JP 2007-291834 A

  Provided is a decorative sheet that absorbs sound and has a decorative property simply by being attached to an existing wall surface, ceiling, or floor without providing a back air layer.

The present invention relates to a decorative film layer having a fine hole having a diameter of 20 to 500 μm and a number density of ² to 700 / cm ² , a film layer and a first adhesive layer, having a thickness of 0.5 mm to 9 A sound-absorbing decorative sheet comprising a non-combustible continuous foam layer of less than 0.0 mm and a second adhesive layer is provided.

  According to the present invention, it is possible to provide a sound-absorbing decorative sheet that is thin, has a sound-absorbing property without a back air layer, and has a non-flammability necessary as a building material. Such a sound-absorbing decorative sheet can be used simply by being attached to an existing wall surface or the like, and at the same time has an aesthetic appearance as a decorative sheet.

It is sectional drawing which shows an example of the sound-absorption decoration sheet | seat of this invention. It is a graph which shows the sound absorption rate of Examples 1, 8-10 and Comparative Examples 2, 3. It is a graph which shows the sound absorption rate of Examples 1-7 and Comparative Example 1.

The sound absorbing decorative sheet of the present invention is
(1) A decorative film layer having a minute hole and comprising a film layer and a first adhesive layer,
(2) includes a nonflammable continuous foam layer, and (3) a second adhesive layer.

  The decorative film layer is formed by laminating a first adhesive layer on a film layer.

  The film layer may be provided with a pattern on either one or both surfaces by a gravure printing method or an offset printing method using a conventionally known ink. Alternatively, a color film can be used.

  The film layer may be a single layer or two or more layers. In the case of two or more layers, an adhesive layer, a primer layer, or a layer having other functions may be included between the layers.

  As the film layer, for example, films made of various synthetic resins such as vinyl chloride resin, vinyl chloride-vinyl acetate resin, acrylic resin, polyester resin, cellulose resin, or polyolefin resin can be used.

  Among these, when using a single layer as a film layer, the film which consists of a polyvinyl chloride resin can be mentioned as a preferable thing.

  Moreover, when the film layer is two or more layers, for example, a transparent surface protective layer made of a fluorine resin or an acrylic resin can be further laminated on the film layer made of vinyl chloride resin. In this case, a pattern or the like can be applied to the surface of the surface protective layer on the film layer side by a conventionally known printing method.

  Although the thickness of the said film layer is not specifically limited, For example, it can be set as about 0.01-0.5 mm.

  The first adhesive layer adheres the film layer and the nonflammable continuous foam layer.

  As such an adhesive layer, a conventionally known pressure sensitive adhesive or heat sensitive adhesive capable of adhering these two layers can be used. For example, as a pressure-sensitive adhesive, a single-layer film-like pressure-sensitive adhesive film containing an adhesive polymer or a double-sided adhesive sheet having two pressure-sensitive adhesive layers can be used.

  As the first adhesive layer, for example, a pressure-sensitive adhesive layer with a release paper having a pressure-sensitive adhesive layer formed on the release surface of the release paper is separately prepared, and the pressure-sensitive adhesive layer and the film layer are dried. It can be manufactured by laminating. Alternatively, an adhesive such as an adhesive polymer can be directly applied to the film layer and dried to form the first adhesive layer.

  Although the thickness of said 1st adhesive bond layer is not specifically limited, For example, it can be set as about 0.01-0.2 mm.

The decorative film layer of the present invention has fine holes. The minute holes have a diameter of 20 to 500 μm and a number density of ² to 700 / cm ² . In such a range, a desired sound absorbing property can be obtained while maintaining the decorativeness.

  The diameter indicates the diameter of a minute hole on the surface of the decorative film layer, that is, the surface opposite to the first adhesive layer. The diameter is more preferably 40 to 350 μm, and further preferably 50 to 250 μm.

The number density indicates the number of minute holes per unit area. The number density is more preferably 4 to 625 / cm ² , and further preferably 10 to 200 / cm ² .

  The suitable ranges of the above-described diameter and number density can be used in appropriate combination.

  The decorative film layer of the present invention can be obtained by laminating the film layer and the first adhesive layer as described above, and then, for example, using a laser or making fine holes with a needle or the like. Alternatively, it is possible to use a commercially available decorative sheet for interiors or a graphic film with an adhesive provided with minute holes as described above.

The laser can be irradiated using a conventionally known apparatus, for example,
Horiuchi Electric Co., Ltd. carbon dioxide laser irradiation machine (LSS-S050VAH-W) or
A carbon dioxide laser irradiator (LUMONICS IMPACT 2500 “LAVIA 1000TW”) manufactured by Sumitomo Heavy Industries, Ltd. Mechatronics can be used.

  When using the latter irradiation machine, the specifications of the laser irradiation apparatus can be set to a wavelength of 9.3 μmm, the average maximum output of the laser irradiation machine is 65 W, the galvano system × 2 heads, and the processing conditions can be set to an output of 1 to 1.6 W. .

  The sound-absorbing decorative sheet of the present invention includes a nonflammable continuous foam layer having a thickness of 0.5 mm or more and less than 9.0 mm. With such a layer, sound absorption and nonflammability can be imparted simultaneously.

  The said nonflammable continuous foam layer is a layer made of a continuous foam having nonflammability.

  Here, having non-flammability means having performance that satisfies the standards relating to non-flammability required for building materials. As such a standard, for example, “a test based on a fireproofing performance test / evaluation work method written by a building materials testing center (modified on July 11, 2005)” can be cited.

  The continuous foam means a porous material in which bubbles are connected to each other. For example, a continuous foam made of one or two or more resins such as a melamine resin, a urethane resin, a polyolefin resin, or a polyvinyl chloride resin, or a continuous foam obtained by mixing a conventionally known incombustible material can be mentioned. it can. Among these, melamine resin is preferable from the viewpoint of sound absorption and nonflammability.

  The thickness of the nonflammable continuous foam layer is more preferably 1.0 to 8.8 mm, and further preferably 2.2 to 6.8 mm.

  The diameter and number density of the fine holes in the decorative film layer and the thickness of the non-combustible continuous foam layer can be used in a suitable combination.

  The sound-absorbing decorative sheet of the present invention has a second adhesive layer for bonding the sheet to an adherend such as a wall. The second adhesive layer can be obtained by the same method using the same adhesive as the first adhesive layer. The thickness can be the same as that of the first adhesive layer.

  In the sound-absorbing decorative sheet of the present invention, a liner (release paper) can be provided on the opposite side of the second adhesive layer from the noncombustible continuous foam layer. Such a liner may be one generally used in the field such as an adhesive tape, and is not limited to a specific member. Suitable liners for use in the present invention include, for example, paper, eg, plastic materials such as polyethylene, polypropylene, polyester, or cellulose acetate, or paper coated with or laminated with such plastic materials, and others Material. These liners may be used as they are, but are preferably used after being treated with a silicone treatment or other methods to improve the release characteristics. Further, the thickness of the liner is not particularly limited, but can be usually about 0.025 to 0.5 mm, or about 0.05 to 0.2 mm.

  In the sound-absorbing decorative sheet of the present invention, a non-combustible continuous foam layer having a desired thickness is attached to the first adhesive layer of the decorative film layer having minute holes, and an adhesive polymer solution is further applied and dried. Thus, the second adhesive layer can be provided. Or it can obtain also by bonding together the 2nd adhesive bond layer obtained by apply | coating an adhesive polymer solution on a liner, and drying, and a nonflammable continuous foam layer.

  The sound-absorbing decorative sheet of the present invention may further include a functional layer such as a primer layer.

  The total thickness of the sound-absorbing decorative sheet of the present invention (sometimes referred to as “total thickness”) can be appropriately selected depending on the purpose of use of the sheet, and is not particularly limited. “Total thickness” indicates the total thickness of the decorative film layer (film layer + first adhesive layer), the non-flammable continuous foam layer, and the second adhesive layer.

  The total thickness is not particularly limited as long as the effect of the present invention can be obtained, and may be, for example, 0.6 to 10 mm, 1 to 9 mm, 1 to 8 mm, or 1 to 3 mm.

  The sound-absorbing decorative sheet of the present invention is used as a sound-absorbing decorative sheet having sound-absorbing property and non-flammability by being attached to the wall surface, ceiling surface, floor surface, partition, etc. of ordinary houses, apartment houses, buildings and other buildings. be able to.

Creating a sample

Examples 1-10, Comparative Examples 1 and 4

Sound absorbing decorative sheet sample (Part A: decorative film layer + nonflammable continuous foam layer)
A decorative film (Dinoc Film FW-888 manufactured by Sumitomo 3M Co., Ltd., thickness of about 200 μm) laminated with a polyvinyl chloride film and an acrylic pressure-sensitive adhesive is irradiated with a carbon dioxide laser irradiator (LSS-S050VAH-W) manufactured by Horiuchi Electric Co., Ltd. Then, a laser having an output of 6 W was irradiated to form minute holes having the diameters and number densities shown in Table 1. The liner was peeled off from the obtained dynoc film having fine holes, and this was attached to a melamine resin layer (BASF melamine resin continuous foam, Bazotect G) having a thickness described in Table 1.
(Part B: second adhesive layer + liner)
A pressure-sensitive adhesive layer was prepared by applying an acrylic pressure-sensitive adhesive (butyl acrylate: acrylic acid = 90: 10, mass ratio, solid content 32%) to the liner by knife coating so that the thickness after drying was 40 μm. .
The surface of the A part melamine resin layer obtained above and the surface of the B part pressure-sensitive adhesive layer were bonded together to obtain a sound-absorbing decorative sheet sample.

Sample for incombustibility test A primer (EC-1368NT manufactured by Sumitomo 3M) was applied to a gypsum board (manufactured by Yoshino Gypsum) having a thickness of 12.5 mm, and the liner of the sound-absorbing decorative sheet sample was peeled off and adhered to obtain a sample. Each sample had a cylindrical shape and had a diameter of 44 mm ± 1 mm and a height of 50 mm ± 3 mm.

Sample for sound absorption measurement and appearance observation test Calcium silicate plate (Hi-Rack 10mm thickness, specific gravity 0.8 manufactured by A & A Materials Co., Ltd.) is prepared, and primer (EC-1368NT manufactured by Sumitomo 3M Co.) is applied on one surface to absorb sound. The liner of the decorative sheet was peeled off and pasted to prepare a sample.

Comparative Example 2
Each test sample was prepared in the same manner as in Example 1 except that a urethane resin layer having a thickness of 2.2 mm (continuous foamed urethane foam Airlon Mac TB-32 manufactured by Achilles Co., Ltd.) was used instead of the melamine resin layer.

Comparative Example 3
Each test sample was prepared in the same manner as in Example 1 except that a polyvinyl chloride resin layer (AG204 manufactured by Sumitomo 3M Limited) having a thickness of 2.2 mm was used instead of the melamine resin layer.

The test was carried out based on the Fireproof Performance Test and Evaluation Work Method Document (changed on July 11, 2005) prepared by the Building Materials Testing Center.

  The samples of Examples 1 to 10 and Comparative Examples 1 to 4 were inserted into a heating furnace and heated. Test conditions, measurement methods, and determination methods were as follows.

Test conditions (1) The test time was set to reach the final equilibrium temperature for 20 minutes or more after sample insertion.
(2) In-furnace temperature is measured using a type K sheath thermocouple with an outer diameter of 1.5 mm (1.6 mm) as defined in JIS C 1605 (sheath thermocouple), and the thermal contact is an ungrounded type. did.
(3) Heating was performed after adjusting the heating furnace so that the temperature in the furnace was stabilized at 750 ° ± 5 ° C. for 20 minutes or more before inserting the sample in advance.
(4) The sample was inserted into the center part of the core tube so that the center line on the side surface of the sample and the position of the thermal contact of the thermocouple substantially coincided.

Measurement Method (1) Before inserting the sample into the furnace, the mass of each sample was measured to the nearest 0.1 g.
(2) The furnace temperature was measured and recorded from the time the sample was inserted until the final equilibrium temperature was reached.
(3) After completion of heating, the sample was cooled to room temperature in a desiccator, and its mass was measured. During the test and after the test, the carbonized portion and debris of the sample dropped into the furnace core tube and the like were collected, and the mass was added to the above mass as an unburned portion of the sample.

Judgment method As a result of the heating test, when each sample satisfied the following criteria (1) and (2), it was determined as acceptable. The results are shown in Table 1, with “O” for pass and “X” for fail.
(1) The furnace temperature must not rise above the final equilibrium temperature by more than 20K for 20 minutes after the start of heating.
(2) The mass reduction rate of the sample after the heating is 30% or less.

Measurement of sound absorption rate The samples of Examples 1 to 10 and Comparative Examples 1 to 4 were measured according to ASTM E1050 using a normal incidence sound absorption measuring machine. The sample diameter was 29 mm. The results are shown in FIGS. 1 and 2 and Table 1. In Table 1, the ratio of the area on the lower side of the graph (area under the curve) is shown with the sound absorption rate from 1000 Hz to 6300 Hz being 100% when the sound absorption rate is 1.

Appearance observation test Each sample of Examples 1 to 10 and Comparative Examples 1 to 4 was attached to a wall and observed visually from a position separated by 50 cm by a linear distance. When the minute hole on the film surface was clearly visible, “X” was indicated, and when it was not clearly visible, “◯” was indicated. The results are shown in Table 1.

DESCRIPTION OF SYMBOLS 1 Sound absorption decoration sheet 100 Film layer 102 1st adhesive layer 104 Nonflammable continuous foam layer 106 2nd adhesive layer 108 Minute hole 110 Decoration film layer

Claims (6)

A decorative film layer in which a film layer and a first adhesive layer are laminated and having fine holes with a diameter of 20 to 500 μm and a number density of ² to 700 / cm ² ;
A sound-absorbing decorative sheet comprising a nonflammable continuous foam layer having a thickness of 0.5 mm or more and less than 9.0 mm, and a second adhesive layer.   The sound-absorbing decorative sheet according to claim 1, wherein the non-combustible continuous foam layer contains a melamine resin.   The sound-absorbing decorative sheet according to claim 2, wherein a diameter of the minute hole is 40 to 350 µm. The number density of fine holes, sound absorbing decorative sheet according to claim 1 which is 4 to 625 cells / cm ^2.   The sound-absorbing decorative sheet according to any one of claims 1 to 4, wherein the melamine resin layer has a thickness of 1.0 to 8.8 mm.   Furthermore, the sound-absorbing decorative sheet according to any one of claims 1 to 5, further comprising a liner.

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