JP2006334024A - Lining material for absorbing vibration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining material for absorbing vibration that can exercise anti-slipping effect and good vibration absorbing effect due to its high shape-following capability against installations and installing surfaces. <P>SOLUTION: A lining material for absorbing vibration 11 is composed of outer layers 13, consisting of a viscoelastic substance such as an acrylic foam, by overlying both sides of an intermediate layer 12 consisting of an elastic foam such as polyurethane. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In order to protect an installation such as furniture installed indoors from vibrations and shocks such as an earthquake and to maintain a predetermined installation state, the installation and the installation surface such as a floor surface and a table are provided. The present invention relates to a vibration-absorbing underlay material used in between.

Conventionally, as this type of vibration-absorbing underlay material, for example, a material formed in a single layer using a urethane-based or acrylic-based adhesive resin has been proposed (for example, see Patent Document 1). Moreover, the thing of the structure which apply | coated such an adhesive resin to both surfaces of the sheet-like base material consisting of a nonwoven fabric or a woven fabric is also proposed (for example, refer patent document 2).
JP-A-10-146234 JP-A-8-317850

However, these conventional materials for vibration absorption have the following problems.
In other words, the vibration-absorbing underlay material having a single-layer structure using a urethane-based adhesive resin is excellent in adhesiveness to the installation object and installation surface, that is, the fixing property, but the table in contact with the vibration-absorbing underlay material Since the ventilation of the installation surface such as the surface is blocked, the installation surface may be altered. In addition, such an underlay material for vibration absorption can maintain a certain degree of flexibility, but because it is a solid body, it has a lot of properties as a solid material, so the amount of deformation is not sufficient and it is installed There was also a problem that the followability to the shape of the surface was poor. In addition, when a urethane-based gel-like material is used as such a vibration-absorbing underlay material, not only does the material cost increase, but if dirt or dust adheres, it becomes an adhesive state and is removed. There was also a problem that it was difficult. In order to improve the followability to vibration, it is possible to use a highly flexible gel-like material as the underlay material for vibration absorption. In this case, the underlay material for vibration absorption adheres to the installation object or installation surface. Therefore, it is unsuitable for installations with a high frequency of movement, such as installations installed on a desk.

  In order to cope with the problems such as the cost of the urethane-based gel material, a single-layer vibration-absorbing underlay material using an acrylic adhesive resin has been embodied (see FIG. 4). Such a vibration-absorbing underlaying material has low strength and rigidity, and therefore, when an installation is heavy, the portion to which a load is applied is greatly compressed, resulting in crushing or breaking. In such a case, not only the vibration absorption effect but also the slip prevention effect cannot be expected. In addition, the acrylic adhesive resin has a problem that it is difficult to produce the acrylic adhesive resin when the thickness is increased in order to improve the vibration absorption effect.

  Moreover, in the base material for vibration absorption of the said patent document 2, since the base material is formed with the nonwoven fabric or the woven fabric, the whole softness | flexibility and flexibility are scarce, and the shape followability with respect to an installation thing and an installation surface is low. . Accordingly, the contact area between the installation object and the vibration-absorbing underlaying material is reduced, and the installation object may fall over or the vibration absorption performance may be reduced.

  The present invention has been made paying attention to such problems existing in the prior art. Its purpose is to have moderate strength and rigidity, and to receive a load without causing heavy crushing or breaking even for heavy objects, and can exhibit an anti-slip effect, and the shape of the installation object and installation surface An object of the present invention is to provide a vibration-absorbing underlaying material that has high followability, can exhibit a good vibration-absorbing effect, and can reduce manufacturing costs.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a second sheet having a lower hardness and adhesiveness than the core material on at least one side of the first sheet of the foamed elastic body as the core material. It is characterized by being laminated.

The invention according to claim 2 is the invention according to claim 1, wherein the first sheet is a rubber sponge.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the second sheet is a foam.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the second sheet is formed by curing an acrylic emulsion.

The invention according to claim 5 is characterized in that in the invention according to any one of claims 1 to 4, the second sheet is laminated on the front and back of the first sheet.
The invention according to claim 6 is characterized in that, in the invention according to any one of claims 1 to 5, a release film is attached to the surface of the second sheet.

(Function)
In the first aspect of the invention, the first sheet as the core material is formed of the foamed elastic body, and the second sheet having adhesiveness is laminated on the first sheet. Is highly conformable to the installation object and the installation surface, can exhibit a good vibration absorption effect, and can suppress slippage by increasing the contact area between them. In addition, since the first sheet is harder than the second sheet, the load of the installation object is received by the entire first sheet, and accordingly, the contact area between the vibration-absorbing underlaying material and the installation surface is increased to increase the contact area. It is possible to effectively prevent slipping between them. Furthermore, since the first sheet has a higher hardness than the second sheet, the second sheet can be prevented from being broken. Therefore, when a vibration is generated in the installation state of the installation using the vibration-absorbing underlaying material, it is possible to suppress the occurrence of positional deviation or overturn in the installation. Moreover, unlike the case where the gel material is used as a whole, the manufacturing cost including the material cost can be reduced.

In the second aspect of the invention, since the first sheet is a rubber sponge, moderate rigidity and vibration absorption can be maintained, and the vibration absorption characteristics are improved.
In the invention according to claim 3, since the second sheet is a foam, not only the shape followability to the installation object and the installation surface is further improved, but also the ventilation to the installation surface can be secured, and the installation surface can be altered. Can be suppressed.

  In the invention according to claim 4, since the second sheet is made of a cured acrylic emulsion, even if dust adheres to the surface of the second sheet, the initial adhesiveness can be easily obtained by washing with water. Can be recovered.

  In the invention according to claim 5, since it has a three-layer structure with the second sheet on the outside, not only can the above-mentioned shape followability and vibration absorption effect be exhibited effectively, but also on both the installation surface and the installation object. Therefore, the movement of the installed object can be effectively suppressed.

  In the invention described in claim 6, since the release film prevents dust and dust from adhering to the second sheet, it is possible to prevent a decrease in the adhesive strength of the second sheet.

  As described above, according to the present invention, it is possible to exhibit an effect of preventing slipping, obtaining a good vibration absorption effect, and being able to manufacture at a low cost.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration-absorbing underlay material 11 of this embodiment is made of a foamed elastic body, and is laminated on both sides of the intermediate layer 12 as a first sheet as a core material. It is comprised by the outer side layer 13 as a 2nd sheet | seat which adhere | attaches and consists of a viscoelastic body. A release film 16 is affixed to the outer surfaces of both outer layers 13 so as to be peelable using the adhesiveness of the outer layer 13.

  As the intermediate layer 12, for example, rubber sponges such as NR, CR, EPDM, and NBR, polyurethane foam, polyolefin foam, silicone sponge, and the like are used. The material of the intermediate layer 12 can be arbitrarily selected from these materials. For example, when the installation object 15 to be installed on the installation surface 14 is a heavy object such as a bag or a bookshelf, an NR rubber sponge is used. It is preferable to use it. When the installation object 15 is a medium-weight object such as a personal computer or an ornament, it is preferable to use a slightly soft rubber sponge such as an EPDM system in addition to the NR rubber sponge. Furthermore, when the installation object 15 is a lightweight object such as a decorative product or glass product, or is required to have adhesion to the installation surface 14, it is preferable to use polyurethane foam or the like.

  The thickness T1 of the intermediate layer 12 is set within a range of 1 to 10 mm, preferably within a range of 2 to 5 mm, in order to ensure appropriate cushioning properties, strength, and rigidity. The intermediate layer 12 has a hardness of 25% compression hardness and is set in the range of 10 to 300 kPa, preferably in the range of 30 to 150 kPa.

  As the outer layer 13, an acrylic, urethane, silicone, styrene resin foam or gel material is used, and an acrylic resin foam having a continuous foam structure is preferable. Further, the thickness T2 of the outer layer 13 is preferably in the range of 1 to 5 mm in order to ensure appropriate cushioning properties, strength and rigidity, similar to the intermediate layer 12, and particularly an acrylic resin foam. When used, it is preferably within a range of 1 to 3 mm from the viewpoint of productivity and material cost. Furthermore, the hardness of the outer layer 13 is set to be lower than the hardness of the intermediate layer 12, and the hardness is in a range of 0.2 to 50 kPa, preferably 0.5 to 30 kPa, at 25% compression hardness. It is set within the range. When the hardness of the outer layer 13 exceeds 50 kPa, the shape following property as the vibration-absorbing underlay material 11 is inferior.

  The outer layer 13 is bonded to both surfaces of the intermediate layer 12 via a hot melt adhesive. The thickness T3 of the entire underlay material 11 for vibration absorption is set within a range of 3 to 10 mm, preferably within a range of 4 to 8 mm.

  The above-described vibration-absorbing underlay material 11 is manufactured as follows. In the production of the rubber sponge constituting the intermediate layer 12, an unvulcanized rubber compound is put into a vulcanization can, vulcanized and crosslinked, and then demolded. And the edge part of the molded object is trimmed into a rectangular block, and is sliced to the above-mentioned predetermined thickness (within a range of 1 to 10 mm). In this way, a sheet to be the intermediate layer 12 is produced. And this sheet | seat is mounted | worn to a predetermined formwork, a hot-melt-adhesive is apply | coated to an upper surface, and before an adhesive hardens | cures, acrylic emulsion resin is cast from it. The release film 16 is pasted after the acrylic emulsion is cured. Next, the surface to which the release film 16 is attached is the lower surface, and the acrylic emulsion is cast and cured in the same manner as described above, and the release film 16 is attached for protection.

  In this way, a laminate having a three-layer structure can be obtained. And this laminated body is made into a square with a side of 80 mm, for example, and a corner part is punched with a Thomson blade having a radius of 10 mm to obtain a vibration-absorbing underlay material 11. The vibration-absorbing underlay material 11 produced in this way is peeled and removed from the release film 16 and is interposed between the installation object 15 and the installation surface 14 such as a table.

  The vibration-absorbing underlay material 11 of this embodiment is configured by laminating and bonding an outer layer 13 made of a viscoelastic material such as acrylic foam on both surfaces of an intermediate layer 12 made of a foamed elastic material such as polyurethane. Therefore, as shown in FIG. 2, when the vibration-absorbing underlaying material 11 is used by being interposed between the installation surface 14 and the installation object 15, even if the installation object 15 is uneven, the upper outer layer 13 can exhibit good shape followability, and can therefore be brought into contact with the installation object 15 in a wide area while having adhesiveness. And even if the load applied from the installation object 15 is local, the load can be stably dispersed in the intermediate layer 12 having a hardness higher than that of the outer layer 13 and can be stably received. Acting on almost the entire outer layer 13, the adhesiveness to the installation surface 14 can be ensured in a wide area.

  In addition, since the intermediate layer 12 is formed of a foamed elastic body such as polyurethane, the entire underlay material 11 for vibration absorption can have appropriate strength and rigidity. Therefore, even when the installation object 15 is a heavy object, coupled with the fact that the load can be distributed almost entirely in the intermediate layer 12 as described above, the load is reliably received without causing the vibration-absorbing underlaying material 11 to be crushed or broken. And can exhibit an excellent anti-slip effect.

Therefore, it is possible to suppress the occurrence of displacement or overturning in the installation 15 when an earthquake occurs in the installation state of the installation 15 using the vibration absorbing underlay material 11.
When an acrylic resin foam having a continuous foam structure is used as the material of the outer layer 13, even when dust adheres to the surface of the outer layer 13, the initial adhesiveness can be recovered by washing with water. This is convenient for repeated use. Moreover, when the acrylic resin foam is used, the outer layer 13 has a fine cell structure. The air permeability can be ensured, the possibility of causing deterioration such as corrosion and deterioration of the contact surface is low, and damage to the installation surface 14 and the like can be prevented. Furthermore, since the acrylic resin foam has excellent weather resistance and low discoloration degradation, when the outer layer 13 is formed from this acrylic resin foam, the surface is colored or subjected to print processing in post-processing. And can increase the degree of freedom of planning and design.

  Moreover, the vibration-absorbing underlay material 11 can be easily formed by laminating and fixing the outer layer 13 on both surfaces of the intermediate layer 12 via an adhesive or the like. In particular, since it is not necessary to thicken the outer layer 13 alone, manufacturing is easy even when an acrylic resin foam is used as the outer layer 13. Therefore, compared with a conventional vibration-proof sheet using a urethane-based gel material, the material cost and production cost can be reduced, and an inexpensive vibration-absorbing underlay material can be provided.

The effects of this embodiment described above are listed as follows.
The upper outer layer 13 can exhibit good shape followability with respect to the installation object 15, and can secure the adhesiveness to the installation object 15. And even if the load from the installation object 15 is local, in the intermediate layer 12 with high hardness, a load can be disperse | distributed to the whole and can be received stably. Therefore, the load of the installation object 15 can be received stably over a wide area, and the sliding movement of the installation object 15 can be suppressed during an earthquake.

  -Even if an acrylic resin foam is used as the outer layer 13, the intermediate layer 12 formed of a foamed elastic body such as polyurethane retains strength, so that breakage can be prevented. For this reason, the movement etc. of the installation object 15 resulting from a fracture | rupture can be prevented.

An effective vibration absorption effect can be obtained by the three-layer structure in which the intermediate layer 12 is sandwiched by the outer layer 13.
-The acrylic resin foam can recover the initial tackiness by washing with water, and can prevent the installation object 15 from moving over a long period of time.

-By using a foam for the outer layer 13, the air permeability with respect to the contact surface of the installation surface 14 and the installation thing 15 can be ensured, and the damage with respect to the installation surface 14 grade | etc., Can be suppressed.
In addition to the acrylic itself forming the outer layer 13 being inexpensive, the outer layer 13 can be easily laminated on both surfaces of the intermediate layer 12 via an adhesive or the like, and the manufacturing cost can be reduced.

  When the acrylic resin foam is made into a sheet, it is troublesome to manufacture if it is thick. However, since the underlaying material 11 for vibration absorption has a three-layer structure, the outer layer 13 made of an acrylic resin foam is provided. There is no need to increase the thickness, and the manufacture is easy.

  Since the release film 16 is adhered to the outer layer 13, it is possible to prevent dust and dust from adhering to the outer layer 13 when the vibration-absorbing underlaying material 11 is not used, for example, during storage or distribution as a product. 13 can be prevented from lowering the adhesive strength.

  -Since the intermediate layer 12 has high rigidity, the adhesive strength between the intermediate layer 12 and the outer layer 13 can be increased. Therefore, the intermediate layer 12 and the outer layer 13 are difficult to peel off. it can.

(Example)
Examples will be described below.

実施例１〜４の吸振用下敷き材１１は、いずれも３層構造である。そして、表１に示すように、実施例１及び実施例２の外側層１３として、それぞれ厚さが１ｍｍ，２ｍｍのアクリルフォーム（株式会社イノアックコーポレーション製 商品種別：アタックＡ−２２０（ＳＲＩＳ硬度：１≧））を用いた。また、実施例３及び実施例４の外側層１３として、それぞれ厚さが１ｍｍの粘着性樹脂（市販粘着樹脂（ウレタン系ゲル製品 ２５％圧縮硬度：３０ｋＰａ））を用いた。

Each of the vibration-absorbing underlay materials 11 of Examples 1 to 4 has a three-layer structure. And as shown in Table 1, as the outer layer 13 of Example 1 and Example 2, acrylic foams having a thickness of 1 mm and 2 mm, respectively (product type: Attack A-220 (SRIS hardness: 1 manufactured by Inoac Corporation) ≧)) was used. Moreover, as the outer layer 13 of Example 3 and Example 4, each 1-mm-thick adhesive resin (commercially available adhesive resin (urethane-based gel product 25% compression hardness: 30 kPa)) was used.

  As the intermediate layer 12 of Example 1 and Example 3, a rubber sponge having a thickness of 3 mm (product type: E-4108 (25% compression hardness: 45 kPa) manufactured by Inoac Corporation) was used, and the intermediate layer 12 of Example 2 was used. A rubber sponge having a thickness of 2 mm (product type: E-4600 (25% compression hardness: 150 kPa) manufactured by Inoac Corporation) was used. As the intermediate layer 12 of Example 4, a urethane foam having a thickness of 3 mm (product type: Color Foam ER-26 (25% compression hardness: 5 kPa) manufactured by Inoac Corporation) was used.

  On the other hand, Comparative Examples 1 and 2 have a single-layer structure having thicknesses of 3 mm and 5 mm, respectively (see FIG. 4), and Comparative Example 1 uses an acrylic foam made of the same material as the outer layer 13 of Examples 1 and 2. In Comparative Example 2, a rubber sponge made of the same material as that of the intermediate layer 12 of Examples 1 and 3 was used.

The bending resistance in Table 1 is based on the JIS L 1096 bending resistance 8.19.1A method (45-degree cantilever method) (sample size 2 cm width × 5 cm length).
Moreover, in the vibration test in Table 1, a test sample as the installation object 15 was placed on a board surface capable of applying horizontal vibration, the behavior during vibration was confirmed, and the horizontal acceleration at which the sample fell over was confirmed. The underlay materials for vibration absorption of Examples 1 to 4 and Comparative Examples 1 and 2 were placed between the bottom surface of the sample and the board surface. here,
As the vibration condition, the acceleration (G) was changed with a horizontal amplitude of a single amplitude of 10 mm (total amplitude of 20 mm).

The load sample is a cylindrical long container with a diameter of 45 mm and a height of 140 mm, and its weight is 550 g.
As is apparent from Table 1, the horizontal acceleration does not reach 0.35 G in the first embodiment, 0.32 G in the second embodiment, 0.65 G in the third embodiment, and 0.37 G in the fourth embodiment. Sample overturning occurred at 0.15 G in Comparative Example 1 and 0.08 G in Comparative Example 2, whereas no sample overturning occurred.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the embodiment, the number of layers of the intermediate layer 12 and the outer layer 13 of the vibration-absorbing underlay material 11 is arbitrarily changed. For example, the intermediate layer 12 and the outer layer 13 are each formed in a single layer so that the outer layer 13 is provided on one side of the intermediate layer 12. Or a five-layer structure in which two intermediate layers 12 and three outer layers 13 are alternately arranged (see FIG. 3).

  The intermediate layer 12 and the outer layer 13 are fixed to each other using a liquid adhesive.

The perspective view which shows the underlay material for vibration absorption of one Embodiment. Sectional drawing which shows the use condition of the underlay material for vibration absorption of FIG. The perspective view which shows the base material for vibration absorption of a modification. The perspective view which shows the base material for vibration absorption of a prior art example and a comparative example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Underlay material for vibration absorption, 12 ... Intermediate layer, 13 ... Outer layer, 14 ... Installation surface, 15 ... Installation object, 16 ... Release film

Claims (6)

A vibration-absorbing underlay material comprising: a second sheet having a lower hardness and adhesiveness than the core material and laminated on at least one surface of the first sheet of the foamed elastic body as the core material. The vibration-absorbing underlay material according to claim 1, wherein the first sheet is a rubber sponge. The vibration-absorbing underlay material according to claim 1 or 2, wherein the second sheet is a foam. 4. The vibration-absorbing underlay material according to claim 1, wherein the second sheet is formed by curing an acrylic emulsion. 5. 5. The vibration-absorbing underlay material according to claim 1, wherein the second sheet is laminated on the front and back of the first sheet. The underlaying material for vibration absorption according to any one of claims 1 to 5, wherein a release film is attached to the surface of the second sheet.

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