JP5188341B2 - Solid sound insulation flooring - Google Patents

Description

  The present invention relates to a solid wood floor material, and more particularly to a solid wood floor material having sound insulation (lightweight floor impact sound insulation performance). More specifically, the present invention relates to a flooring material excellent in soundproofing (sound insulation) made of a solid material that is constructed by spreading on a floor base such as a wooden board or concrete.

  Generally, the floor of a house is configured by spreading a floor material made of a wood material or the like on the upper surface of a floor base material such as plywood, particle board or concrete board.

  In recent years, soundproofing (sound insulation) flooring materials have come to be used as flooring materials for middle- and high-rise houses. In order to reduce the sound generated on the floor, it is effective if the deflection is large when an object comes into contact with the floor. For this purpose, it is effective to increase the deflection by groove processing on the back surface, which is a method already disclosed in the composite floor board, and the sound insulation floor material has been devised to obtain a soundproof effect for the composite material (so-called plywood). Things have been proposed. For example, in Japanese Patent Application Laid-Open No. 7-4012 (Patent Document 1), a groove is formed in the second single plate from the front side of the plywood from the back side of the veneered decorative plywood, and latex is sprayed on the back side. A flooring has been proposed in which a cushioning material obtained by applying and foaming a synthetic resin foam composition to the opposite side of the convex part of the fiber mat layer with the convex part is bonded.

  Japanese Patent No. 3068380 (Patent Document 2) discloses a decorative flooring material in which a surface material is provided on a base plate made of plywood of 3 primes or more via an intermediate layer, and the surface material is a medium fiberboard. And a decorative material provided on the upper surface thereof, the intermediate layer is made of an elastic material, and the back groove reaching the intermediate layer has a groove width of 1 to 5 mm and a depth of 10 mm. A decorative flooring material having a plurality of strips formed at intervals of ˜150 mm is disclosed.

  Furthermore, in Japanese Unexamined Patent Publication No. 2000-291242 (Patent Document 3), a plurality of back grooves are formed in parallel on the back side of the back surface of the plywood base material in which a plurality of substrates are laminated with their fiber directions alternately orthogonal. A wooden flooring has been proposed in which a cut in the same direction as the back groove is formed at the bottom of the back groove.

  However, all of these are intended for flooring made of plywood (composite material) in which multiple layers of thinly sliced substrates are bonded together with an adhesive. Is used. Solvents and low-molecular-weight organic components (mainly formaldehyde, etc.) contained in this adhesive are considered to be the main causative substances of sick house syndrome, a general term for health injuries derived from homes. Health effects on the environment and pollution to the environment are problems.

  On the other hand, a solid base material is a base material made of a single plate, and has a strong popularity from the standpoints of being able to suppress the amount of adhesive used, strength, and high quality as a material. However, floor materials using such a solid substrate have hitherto been difficult to achieve sound insulation (specifically, to achieve the LL45 level according to JIS A1419).

Japanese Patent Laid-Open No. 7-4012 Japanese Patent No. 3068380 JP 2000-291242 A

  Therefore, the object of the present invention is excellent as a sound insulating property made of a solid base material that can minimize the use of an adhesive as a flooring material to be laid on a floor base such as a wooden board or concrete. The object of the present invention is to provide a solid sound insulation floor board (a floor material that can be applied directly to a concrete floor to achieve the necessary sound insulation rating LL45).

  The present inventors have succeeded in obtaining a solid floor material having practical sound insulation properties for the first time by applying both predetermined grooving and lateral grooving to the back surface of the solid base material and attaching a cushioning material. .

That is, the present invention provides the following soundproofing flooring.
1. A sound-insulating flooring material comprising a solid plate-like solid base material and a buffer material layer provided on the back surface of the solid base material via an adhesive layer, along the grain of the back surface of the solid base material A solid sound-insulating flooring material, wherein a plurality of vertical grooves parallel to the longitudinal direction and a plurality of horizontal grooves perpendicular to the vertical grooves are provided at predetermined intervals.
2. It consists of solid unit wood (floor base material) that has a predetermined thickness, a predetermined width, and a predetermined length, and has a connecting ozan (male) and mezzanine (female) on the side. The sound insulation floor material used as a floor surface by connecting sheets, wherein the unit solid wood is a plurality of vertical grooves having a predetermined width and a predetermined depth at predetermined intervals in the vertical direction along the grain of the back surface, and the vertical direction The solid sound-insulating flooring material according to the preceding item 1, characterized by having a lateral groove having a predetermined width and a predetermined depth at a predetermined interval in a horizontal direction perpendicular to the front surface, and a buffer material having a predetermined thickness bonded to the entire back surface.
3. 3. The solid sound insulating floor material according to item 1 or 2, wherein the vertical groove and the horizontal groove have a groove width of 1 to 4 mm and are provided at a depth of 2 to 5 mm from the surface of the solid base material.
4). The solid base material is 9 mm thick and 75 mm wide, and a 5 mm thick cushioning material is bonded to the back surface through an adhesive layer, and the width of 3 mm depth in the vertical direction along the grain of the back surface of the solid base material. Any of the preceding items 1 to 3, wherein six longitudinal grooves of 7 to 6.0 mm and lateral grooves having a width of 1.6 mm and a depth of 5.3 to 5.5 mm are provided at intervals of 10 mm in the transverse direction perpendicular to the longitudinal direction. Solid sound insulation flooring as described in.
5. The solid sound-insulating floor material according to any one of the preceding items 1 to 4, wherein the cushioning material is a nonwoven fabric.
6). Nonwoven, polyethylene film having a thickness of 10 to 15 [mu] m, basis weight 80~300g / m total thickness of the spunbond stacked staple fibers polyester and basis weight 15~70g / m ² of the long fiber polyester ² 3 The solid sound-insulating flooring material according to 5 above, which has a 7-layer three-layer structure.
7). 6. The solid sound-insulating floor material according to any one of 1 to 5 above, wherein the adhesive layer is made of a vinyl copolymer resin emulsion adhesive.

  In particular, in recent years, apartment buildings such as condominiums often require a sound insulation grade of LL45 level. The present invention relates to a sound insulation standard (specifically, LL (lightweight floor impact according to JIS A1419)) for a flooring material using a solid base material that can be directly attached to a concrete floor and has no health and environmental concerns due to formaldehyde and the like. It was the first time that sound insulation performance (45 levels) was achieved.

The soundproofing solid flooring of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view of an example of a soundproofing solid floor material of the present invention, and FIG. 2 is a transverse sectional view.
1 in the figure is a solid flooring. The material for the solid floor material is not particularly limited, and materials that are generally used as floor base materials for construction can be widely used. For example, materials made of broad-leaved trees (such as oak, hippopotamus, tamo and itaya) and coniferous trees (pine wood such as Todomatsu and larch, cedar, etc.) are used. The solid base material used in the present invention includes a solid processed base material that has been subjected to compression processing. The surface of the solid substrate is preferably coated as a general surface finish.

2 is a buffer material, 3 is an adhesive layer. When various materials were examined, as a buffer material, a polyethylene film having a thickness of 10 to 15 μm, a short fiber polyester having a basis weight of 80 to 300 g / m ² (thickness of 3 to 7 mm) and a basis weight of 15 to 70 g / long fiber polyester spunbonded nonwoven m ² of polyester having a three-layer structure (thickness: 0.12～0.3Mm) nonwoven fabric was found to be good. When the weight of the cushioning material main part is large, the feeling of walking becomes unstable, and when the weight is small, the sound insulation performance is lowered.
In this invention, the buffer material layer which consists of this polyester nonwoven fabric of 3 layer structure is joined to the back surface of a solid base material with an adhesive agent. The buffer material is suitably 3 to 7 mm for the entire three layers.

  In the present invention, an aqueous adhesive that does not use an organic solvent and does not contain a formaldehyde component (for example, a vinyl copolymer resin emulsion adhesive) is used as the adhesive layer 3.

4 is a longitudinal groove provided in parallel along the longitudinal (wood) direction of the substrate, and 5 is a transverse groove orthogonal to the longitudinal groove. The vertical grooves and the horizontal grooves are formed in a grid pattern. In the present invention, the vertical groove and the horizontal groove cause an appropriate bending, and an appropriate sound absorbing function is maintained.
The larger the area of the groove is, the better the sound insulation effect is. However, if the area is too large, the strength of the flooring material is lowered, and the impact such as cracking may occur due to impact.

  The number of longitudinal grooves depends on the width of the substrate, but 5 to 7 is appropriate for a 75 mm width substrate. The groove width is 1 to 3 mm. If the lateral groove is narrower than 1 mm, it is necessary to increase the number in order to obtain sound insulation. On the other hand, if it is wider than 3 mm, the number can be reduced, but the local strength becomes small.

  Further, the groove width is not provided at approximately 20 mm or more and 30 mm at the end in the longitudinal direction of the base material, but is provided at almost equal intervals (for example, at intervals of 10 mm) throughout the rest. The reason why the portion where the groove is not provided is left at the end in the longitudinal direction is to leave the portion as a portion to which a force is physically applied when the male 7 is fitted into the female 6 at the time of connecting the unit base members.

  The unit base is usually 9 mm thick and 75 mm wide for laying in a condominium or the like. The total thickness including the cushioning material layer is 14 mm, and the actual thickness by bonding is 12. It should be 5 to 13.5 mm. In the case of a basic substrate having a thickness of 9 mm and a width of 75 mm, the number of longitudinal grooves is 6 and the groove width is 3 mm, and the number of lateral grooves is 450 mm in length, approximately 400 mm excluding both ends 20-30 mm. 41 are provided at intervals of approximately 10 mm. The depth of the groove is 3 to 3.5 mm from the solid substrate surface. If the depth is too deep, the strength of the flooring will decrease.

  Of course, the size of the basic base material is not limited to the above. For example, the length is determined in accordance with the characteristics of the solid material, in addition to the standard scale (stepless length setting between 450 to 900 mm). ), Irregular scale (such as 450mm, 500mm, 600mm, 700mm, 800mm, 900mm), finger joint type (joint with adhesive in the length direction to make a standard), etc. It is.

  Regarding the width, 54 mm, 64 mm, 90 mm, and the like are also used. In order to cope with these variations, the above-described lattice-like groove processing is effective, and can be solved by a combination thereof.

As a solid flooring, a unit substrate of 9 mm thick, 75 mm wide and 450 mm long or longer was used, and six vertical grooves having a depth of 5.5 mm and a groove width of 3 mm were processed on the back surface. Moreover, the horizontal groove orthogonal to the vertical groove was processed with a depth of 5 mm and a groove width of 1.6 mm at intervals of 10 mm, excluding both end portions 30 mm in the length direction. Daiure Co., Ltd. has a three-layer structure consisting of a 5 mm thick polyethylene film, a 5 mm thick short fiber polyester, and a 0.25 mm thick spunbond nonwoven fabric on the entire back surface of this processed solid flooring. The shock-absorbing material made by bonding was pasted with an adhesive (vinyl co-condensation emulsion type adhesive; Konishi Bond CEL63NT) and pressure-bonded with a roller. The layer structure of this cushioning material was such that a polyethylene film was sandwiched between them, short fiber polyester was provided on the wood flooring side, and long fiber polyester was provided on the concrete floor side.
This unit base material was spread on a test concrete flooring material (slab thickness 150 mm) of 3680 mm × 2770 mm in combination with male and female berries, and floor impact sound performance was measured for this test space according to JIS A1440. Specifically, tapping machines are installed at five locations on the floor with sound-insulating flooring, and the sound of the impact is analyzed octave with a microphone installed downstairs. When the LL (lightweight floor impact sound blocking performance) value was calculated from the measured value at 1, the performance to achieve LL45 could be confirmed.
This is an example, and innumerable variations can be conceived in the connecting process such as the width, depth, number, interval, and sash of each groove.

In order to reduce the sound generated on the floor surface, the effect is effective if the deflection is large when an object comes into contact with the floor. For this purpose, it is effective to increase the deflection by the groove processing on the back surface, which has already been disclosed in the composite floor board, but the solid floor board has not been solved so far. The present invention solves this problem by applying vertical groove processing and horizontal groove processing to a solid floor board and combining appropriate cushioning materials in a balanced manner.
In recent years, when flooring is used in an apartment house such as a condominium, an LL45 grade is more frequently required than a condominium association. According to the present invention, it is very significant that it is possible to provide a solid sounding flooring that can be directly attached to a concrete floor such as an apartment, and that it is possible to propose an option of solid flooring to a consumer when refurbishing from a carpet to a flooring.

It is a longitudinal cross-sectional view of an example of the solid flooring of this invention, and shows the state which processed the horizontal groove 5 in the back surface of the solid flooring. FIG. 2 is a cross-sectional view of the solid floor material of FIG. 1, showing a state in which vertical grooves 4 are processed on the back surface of the solid floor material 1.

Explanation of symbols

1 Solid flooring 2 Buffer material 3 Adhesive layer 4 Back groove (vertical groove)
5 Back groove (lateral groove)
6 Female 7 Male

Claims (5)

A sound-insulating flooring material comprising a solid plate-like solid base material and a buffer material layer provided on the back surface of the solid base material via an adhesive layer, along the grain of the back surface of the solid base material A plurality of longitudinal grooves parallel to the longitudinal direction and a plurality of transverse grooves perpendicular to the longitudinal grooves are provided at predetermined intervals, and the cushioning material is formed on a polyethylene film having a thickness of 10 to 15 μm and a basis weight of 80 to 300 g / m. A solid sound-insulating flooring material comprising a nonwoven fabric having a three-layer structure of 3 to 7 mm in total thickness obtained by laminating ^two short fiber polyesters and a long fiber polyester spunbond having a basis weight of 15 to 70 g / m ² .   It consists of solid unit wood (floor base material) that has a predetermined thickness, a predetermined width, and a predetermined length, and has a connecting ozan (male) and mezzanine (female) on the side. The sound insulation floor material used as a floor surface by connecting sheets, wherein the unit solid wood is a plurality of vertical grooves having a predetermined width and a predetermined depth at predetermined intervals in the vertical direction along the grain of the back surface, and the vertical direction The solid sound-insulating flooring material according to claim 1, comprising lateral grooves having a predetermined width and a predetermined depth at a predetermined interval in a lateral direction perpendicular to the surface, and a cushioning material having a predetermined thickness bonded to the entire back surface. .   The said vertical groove and a horizontal groove are the solid sound-insulating flooring materials of Claim 1 or 2 which are 1-4 mm in groove width, and are provided in the depth from the solid base material surface to the position of 2-5 mm.   The solid base material is 9 mm thick and 75 mm wide, and a 5 mm thick cushioning material is bonded to the back surface through an adhesive layer, and the width is 3 mm deep in the vertical direction along the grain of the solid base material back surface. Any one of Claims 1 to 3 which comprises six longitudinal grooves of 7 to 6.0 mm, and lateral grooves having a width of 1.6 mm and a depth of 5.3 to 5.5 mm at intervals of 10 mm in the transverse direction perpendicular to the longitudinal direction. Solid sound insulation flooring as described in Crab. The solid sound-insulating floor material according to any one of claims 1 to 4 , wherein the adhesive layer comprises a vinyl copolymer resin emulsion adhesive.

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