JPH04119839A - Damping and soundproofing material and preparation thereof - Google Patents

Abstract

PURPOSE:To obtain excellent damping and soundproofing effect by using a hot melt adhesive as an adhesive laminating a plurality of cardboards. CONSTITUTION:When a plurality of cardboards are laminated, a hot melt adhesive 12 is used as the adhesive layer between the cardboard layers. As the cardboard, one having relatively large thickness is used and, for example, cardboard with a basis weight of about 250-650g/m<2> is pref. The hot melt adhesive can be used by appropriately compounding a tackifier, a plasticizer, a filler, wax and an oxidation inhibitor with a base polymer such as an ethylene/vinyl acetate copolymer or a styrenic copolymer. Further, a hot melt adhesive wherein loss modulus (G'') in a use temp. region (0-40 deg.C) is 10<4>-10<8> dyne/cm<2>, loss tangent (tandelta) is within the range of 0-40 deg.C and the peak value thereof is 0.3-3.0 is pref. used. By this method, excellent damping and soundproofing effect can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to vibration damping and soundproofing materials used for building materials such as houses, auxiliary equipment for houses, home appliances, automobiles, etc., and a method for manufacturing the same.

[Prior art and its problems] In recent years, noise in the residential environment has become a problem, and for example, problems between neighbors due to partition walls installed between neighboring houses in apartment complexes or vibrations between upper and lower floors have become a social problem. It has become Similar issues have been raised regarding the noise emitted by household appliances such as washing machines, refrigerators, and vacuum cleaners with rotating equipment used in homes.

Damping steel plates have recently been developed as materials for this type of noise suppression and vibration suppression. It is used for the side panels of electric washing machines for various purposes.

On the other hand, in the case of general houses and apartment complexes made of wooden or lightweight concrete plates, damping rubber is attached to the plasterboard, plywood, or steel plates used for the walls and ceilings of these houses. What is known? However, when it comes to rubber-based damping materials, they are thicker and more expensive, making it difficult to recognize the vibration-damping effect, and when used for the interior of a house, there are problems such as the living space becomes narrower. On the other hand, when made thinner, the rigidity suddenly decreases, and vibrations cannot be damped even when bonded to building materials. In addition, as building materials, there are also known building materials laminated with thermoplastic resin sheets, non-woven fabrics, foamed resin sheets, etc., but none of the above have produced satisfactory effects.

By the way, in recent years, there have been proposals for vibration-damping and sound-insulating materials made by laminating multiple sheets of paperboard glued together using emulsion-based adhesives such as acrylic synthetic rubber adhesives, but in order to improve vibration-damping performance, a large amount of Emulsion adhesive must be applied to the paper layer, and in that case, a large amount of moisture remains in the paper layer, causing mold and curling. Furthermore, a large amount of drying energy and a long drying time are required in order to evaporate the water that has seeped into the paper layer during manufacturing, resulting in various problems such as poor productivity. Moreover, if the water evaporates incompletely, the stiffness of the paperboard, which is the constraining layer of the damping material, will decrease due to the residual water.
As a result, no force is applied to the viscoelastic resin layer formed between the paperboards, so it is difficult for the vibration-induced shearing force (stretching deformation force in the case of non-constraint type) to be transmitted to the viscoelastic resin layer. There was a problem in that it became difficult to absorb energy due to the vibration damping performance. To be more specific, as shown in the comparative example below, even when two sheets of paperboard with a moisture content of 8% before processing are laminated using an emulsion adhesive with a high solids content, there is no difference in the adhesive content. Because some of the moisture diffuses into the paper layer, after processing, the moisture is 10 to 1596
increases to If the stiffness of paperboard with 8% moisture is 100,
The stiffness decreases to 97 at 10% moisture and 91 at 15% moisture. In addition, the loss coefficient of a paperboard-based composite sheet consisting of paperboard/synthetic resin/paperboard using paperboard with a moisture content of 8% was 100%.
When the moisture content is 10%, it is 95, and when the moisture content is 15%, it is significantly reduced to 88.

[Object and Structure of the Invention] An object of the present invention is to solve the above-mentioned problems and provide a vibration damping and sound insulating material that has both vibration damping and sound insulating properties.
The vibration damping and sound insulating material according to the present invention is applied to the surface of at least one sheet of paperboard using a hot melt adhesive or coating agent (hereinafter simply referred to as adhesive or HM adhesive) specified below.
A non-constraint type vibration damping and sound insulating material made by laminating the above so that the thickness after assimilation is 30 μm or more, and a constraint made by laminating multiple sheets of paperboard together via the hot melt adhesive layer mentioned above. This includes a type of vibration damping and sound insulating material. In addition, when laminating a plurality of paperboards, is it necessary for at least one adhesive layer among the adhesives between the paperboard layers to be a true melt adhesive layer having the above-mentioned thickness? For other adhesive layers, emulsion adhesives and other adhesives other than those mentioned above may be used. However, if an emulsion adhesive is used in conjunction with the adhesive, it will not be used as a vibration damping layer, but simply for the purpose of bonding the paperboards together, and in that case, care should be taken to avoid adding moisture to the paper as much as possible.
It is necessary to reduce the coating amount to about 20 μm or less based on the solid content.

Furthermore, in the present invention, since the hot melt adhesive has an extremely high viscosity, when producing the vibration damping and sound insulating material, it is preferable to use a kneader-ruder (Kneider-Ruder) described below.
After kneading, melting, and dehydrating using a slit die and extruding it into a thin film, it is laminated on the surface of paperboard, or it is laminated using a gear-in-die coater or roll coater. Apply to paperboard by such methods as In addition, when winding up paperboard laminated with hot melt adhesive as mentioned above, it is necessary to wind it on a relatively large diameter drum so as not to reduce the rigidity of the paperboard, or to cut the laminated paperboard using a lithographic cutting machine. Cut the material directly to avoid the above-mentioned problems.

The paperboard used in the present invention is relatively thick paperboard, for example, with a basis weight of 250 to 650 g/
It is preferable to have a size of about m2.

As the adhesive, a hot melt adhesive is used.

Examples of hot melt adhesives include known ethylene-vinyl acetate copolymers, styrene copolymers, polyethylene,
A tackifier, plasticizer, filler, wax, antioxidant, etc. can be suitably added to a base polymer such as polyamide, polyester, or polypropylene.

The hot melt adhesive used in the present invention has a loss modulus (G''), which is a viscoelastic value in the operating temperature range (0°C to 40°C), or 10 to 108 dyne, based on the study results of the present inventors.
/Cm2, the loss tangent (tan δ) has a gentle peak in the range of 0°C to 40°C, and the peak value is 0
．． It has been found that using a hot melt adhesive having a rating of 3 to 30 is effective in absorbing vibration hisses when such a hot melt adhesive is used. Among the base polymers mentioned above, styrene isoprene-styrene copolymer and atactinic polypropylene may be used as the base polymer.

As mentioned above, the hot melt adhesive used in the vibration damping and sound insulating material of the present invention should be selected so that its glass transition temperature (Tg) range matches the operating temperature range, and the loss modulus (G'' ) and loss tangent (tan δ) should have characteristics that do not have sharp peaks but have gentle peaks within the operating temperature range. However, if you use one that has a transition region within the operating temperature range, This is because the polymer of the melt adhesive component effectively absorbs vibrational energy through macroscopic or microscopic entanglement of main chains and side chains.Also, the amount of hot melt adhesive used is , it is necessary that the thickness after coating be at least 30 μm.

Next, the loss modulus (G”) and loss tangent (tan
δ) and the loss coefficient (η) in the data described below will be explained. The above-mentioned loss coefficient is a sound loss coefficient for the vibration-damping and sound-insulating material that is the object of the present invention, as well as the composite material of the vibration-damping and sound-insulating material and the material to which it is attached, such as gypsum hoarding and calcium silicate board. loss modulus and loss tangent are both measured values of viscoelasticity of the hot melt adhesive itself. By the way,
Both the loss modulus and the loss tangent indicate the amount of energy loss, and they have the following relationship.

Note that unlike emulsion adhesives, the hot melt adhesive used in the present invention does not allow moisture to migrate into the paper layer after the adhesive is applied, so there is no decrease in the stiffness of the paper. It is thought that the vibration energy absorption ability of the hot melt adhesive layer and the vibration energy absorption ability of the paperboard can be effectively expressed.

There are various types of layer configurations of the vibration damping and sound insulating material in the present invention, and the basic layer configurations are listed below.

HM/Paperboard/HM/Paperboard/HM/Paperboard/EM/Paperboard/HM/Paperboard/P
E/Paperboard/HM/Paperboard/P E/Paperboard/HM/Paperboard/HM/Paperboard/HM/Paperboard, HM=Hot melt adhesive M=Emulsion adhesive E-Polyethylene film or sheet shows. In addition to polyethylene, the layer indicated as PE can also be made of a relatively rigid laminate resin or film such as polypropylene, polyethylene terephthalate, or polymethylpentene, and in that case, the thickness of PE is as follows: It is possible to set the thickness to about 15 to 40 μm. Note that the laminate resin or film indicated as PE above has moisture-proof properties, so when used together, it can prevent condensed water from the concrete in the GL method wall (see Figure 11) from seeping into the surface of the gypsum board. It is also effective in preventing the growth of mold.

Building materials such as plywood, gypsum board, and steel plates are laminated to one or both sides of the vibration-damping and sound-insulating material made of paperboard laminated, and examples thereof will be explained in detail based on the attached drawings. FIG. 1a schematically shows a non-restrictive vibration damping and soundproofing material according to the present invention, in which reference numeral 11 denotes a paperboard layer;
Reference numeral 2 indicates a hot-melt adhesive layer, and reference numeral 13 indicates an object (material) to which a vibration damping and sound insulating material having the above structure is attached, such as a gypsum board. Similarly, FIG. 1 shows a state in which the vibration damping and sound insulating material is activated under the influence of solid-borne sound or air-borne sound from a vibration source or a noise source, and in the case of an unrestrained type, the HM layer 12 This is a schematic illustration of the occurrence of stretching deformation. Furthermore, FIGS. 2a and 2b are cross-sectional views showing the behavior of a constraint type vibration damping and sound insulating material, in which the same members as above are denoted by the same reference numerals, and the restraint type control It is schematically shown that shear deformation occurs in the HM layer in the case of vibration and soundproofing materials. Figures 3 and 4 are perspective views showing the state in which the vibration-damping and sound-insulating material of the present invention is attached to a target object 13 such as a gypsum board, with Figure 3 being a single-sided type and Figure 4 being a double-sided type. showed that.

5 and 6 show an example of the kneader/ruder described above, in which 20 is a frame, 21 is a premixer, and a heating device is incorporated in the outer shell.

22 is a motor that drives the stirring blade 21a in the premixer, 23 is a kneader, and the hot melt adhesive (hereinafter referred to as HM The adhesive (referred to as adhesive) is guided into the kneader, further kneaded uniformly, and then introduced into the extruder 25 equipped with a heating device located at the bottom of the kneader 23. It is extruded through a supply pipe 25a attached to. Incidentally, reference numeral 23a denotes a stirring blade provided inside the kneader, which is driven by a motor 23c attached to the upper end of the mounting shaft 23b.

The HM adhesive supplied through the supply pipe 25a is laminated onto the paperboard 11 by a slit die type laminator 26 or 27 as shown in FIGS. Note that the reference numeral 26 indicates a laminator that extrudes the resin sideways, and the reference numeral 27 indicates a fountain system that causes the resin to flow upward. FIG. 9 shows an example in which the HM adhesive is laminated onto the surface of the paperboard 11 using a roll coater 28.

FIG. 10 shows another embodiment in which the vibration-damping and sound-insulating material of the present invention is manufactured using the same roll coater method, and reference numeral 30 denotes an HM adhesive storage tank (30) in which a heating device is incorporated.
A supply pipe 31 opened at the bottom of the tank 30 and a feed pump 3 installed in the middle of the pipe.
The HM adhesive in the tank 30 is led to the pan 33 through the pan 33. Inside the pan 33, a coating roll 34 that rotates while immersed in molten HM adhesive and a non-rotating measuring roll 35 are disposed facing each other, and a proper amount of HM adhesive is controlled by the nip between them. The agent is applied via a coating roll 34 to the paperboard 11 running directly above it. The laminate coated with the HM adhesive is polymerized with another paperboard 11 via a pair of upper and lower pressure rolls 36a and 36b disposed in the next stage, and the two paperboards are laminated with the HM adhesive. It becomes a vibration damping and sound insulating material. Reference numeral 37 is a guide roll that guides the running of the laminated paperboard.

Although not shown in the drawings, the laminated material manufactured as described above may be wound up on a large-diameter winding tram and then polymerized with another laminated board, or immediately after manufacturing. In some cases, the paper is cut to a specified size using a flat cutting machine without being rolled up. Furthermore, in the single-sided laminate manufactured by the apparatus shown in FIGS. 7 to 9, another paperboard 1 can be bonded to the exposed surface of the HM adhesive layer 12 provided on the surface of the paperboard 11. In this way, a vibration damping and sound insulating material having an arbitrary number of laminated layers is manufactured.

[Embodiments] Examples of the present invention will be specifically described below along with comparative examples.

Example 1 Two sheets of paperboard with a basis weight of 300 g/m2 were coated with a hot melt adhesive having a styrene-isoprene-styrene copolymer resin as the base polymer, and the coating thickness of the adhesive was 60 g/m2.
Two sheets of laminated paperboard, which were laminated in the same manner, were bonded together using a styrene-acrylic copolymer resin emulsion (thickness after drying: 20 μm), for a total of 4 sheets. A vibration damping and sound insulating material made by laminating paperboards was obtained.

A 9n+m thick plywood was attached to one side of this vibration damping and sound insulating material, and a 3 mm thick plywood was attached to the other side with an adhesive. The viscoelasticity of the hot melt adhesive used in Example 1 is the loss modulus (G”) or 4XIO6dyne/4XIO6dyne/at 5°C.
cIII2.8 x 10”dyne/c at 20°C
m”, loss tangent (tan δ) is 1.7 at 5°C,
It was 067 at 20°C. In addition, the glass transition temperature (Tg
) was +0.5°C.

Comparative Example 1 Except for Example 1, except that a styrene-buta/ene copolymer latex emulsion was used instead of the hot melt adhesive to bond the two paperboards together, and the thickness after drying was 60 μm. A vibration-damping and sound-insulating material was obtained in exactly the same manner as in Example].

Example 2 Completely the same as Example 1 except that in Example 1, two sheets of paperboard with a Tsubo Ji of 600 g/m2 were used and the thickness of the hot melt adhesive used to bond the two sheets of paperboard was 120 μm. The vibration damping and sound insulating material of the present invention was obtained.

Example 3 Two sheets of paperboard with a basis weight of 280 g/rn2 were laminated with a polyethylene extrusion laminate with a thickness of 40 μm, and separately, two sheets of laminated paperboard laminated in the same manner were laminated with a styrene-isoprene-styrene copolymer. Using a hot-melt adhesive with a base polymer, they were laminated and laminated so that the coating thickness of the adhesive was 60 μm. Next, in the same manner as in Example 1, plywood was bonded to the upper and lower surfaces of the laminated paperboard to obtain a vibration damping and sound insulating material of the present invention.

Example 4 Two sheets of paperboard with a basis weight of 800 g/m2 were bonded and laminated using the hot melt adhesive so that the thickness of the adhesive layer was 60 μm, and the same procedure as in Example 1 was carried out. Then, plywood was laminated on the upper and lower surfaces of the laminated paperboard to obtain the vibration damping and sound insulating material of the present invention.

Comparative Example 2 In Example 4, two sheets of paperboard of tsubo JiLBOOg/m2 were replaced with a polyacrylic acid ester emulsion adhesive (60 μm thick after drying) instead of the hot melt adhesive.
) A vibration-damping and sound-insulating material was obtained in exactly the same manner as in Example 4, except that the materials were laminated and laminated.

Example 5 The control of the present invention was carried out in exactly the same manner as in Example 1, except that a hot melt adhesive having a styrene-butylene-styrene copolymer resin as the base polymer was used as the hot melt adhesive. Vibration and soundproofing material was obtained.

The viscoelasticity of the hot melt adhesive used here has a loss modulus (G”) of 4.3 xlO6dyne/cm at 5°C.
``9.1 xlOdyne/cm2 at 20℃, loss tangent (tanδ) was 1.3 at 5℃, and 0.5 at 20℃. there were.

Example 6 Two sheets of paperboard with a basis weight of 300 g/m2 were laminated in the same manner as in Example 1, and two laminated paperboards laminated in the same manner were separately laminated to form a hot melt film using a styrene-isoprene-styrene copolymer as the base polymer. A vibration-damping and sound-insulating material layer consisting of four paperboards was created by bonding them together using an adhesive to a thickness of 60 μm, and a 9mm-thick gypsum board was placed on the top surface of these four laminated paperboards, and on the bottom surface as well. A 91-thick gypsum board was laminated with the hot melt adhesive (thickness: 20 μm) to obtain a soundproofing material combined with a gypsum board.

Comparative Example 3 A vibration damping and sound insulating material was obtained in exactly the same manner as in Example 6, except that a styrene-butadiene copolymer latex emulsion was used instead of the hot melt adhesive.

Example 7 A damping material layer similar to Example 6 with a thickness of 8 m on the top surface of the paperboard.
/ m calcium silicate plate with a thickness of 8rn /
m calcium silicate plate with hot melt adhesive 20μm
A vibration damping and sound insulating material of the present invention was obtained by laminating the material to a calcium silicate plate.

Comparative Example 4 Vibration and soundproofing was carried out in exactly the same manner as in Example 7, except that the two sheets of paperboard were bonded together using a styrene-butadiene copolymer latex emulsion instead of the hot melt adhesive. I got the material.

Example 8 In the configuration of Example 6, instead of the plasterboard on the back side,
This is an example in which the vibration damping and sound insulating material of the present invention is used as a wall that is directly attached to a concrete frame. That is, as shown in FIG. 7, a dumpling-shaped paperboard portion 11 on the back side of the vibration-damping and sound-insulating material made by laminating four paperboards with hot melt adhesive (HM) shown in Example 6 is directly pasted. The concrete frame 13a (150n+m
Thickness) and glued together. In this case, the HM layer forms a uniform film-like membrane, so it has good moisture resistance and is less susceptible to moisture from the concrete structure or moisture from the direct bond, and the damping material as a whole is It doesn't curl either. Furthermore, during construction, the damping materials were in good contact with each other, with no steps occurring.

Comparative Example 5 A vibration damping and sound insulating material was obtained in the same manner as in Example 8, except that the styrene-butadiene copolymer latex emulsion of Comparative Example 3 was used in place of HM in the same manner as in Example 8. It was then glued to the concrete frame (150mm thick). In this case, the moisture in the latex remains in the paper layer, and it is difficult to form a uniform continuous film of latex. Naturally, the moisture resistance is also low, so moisture from the concrete frame and the bond for direct application are difficult to form. Moisture tends to cause the entire damping material to curl, and when the damping materials are pressed against each other during construction, a step is formed and the appearance is poor.

Example 9 In Example 8, the procedure was exactly the same as in Example 8, except that the hot melt adhesive (HFvl) closest to the direct attachment bond (see Figure 7) was a polyethylene film (thickness: 40 μm). It was bonded to the concrete frame 13a. Since the PE exhibits good moisture resistance, good results were obtained similar to the examples above.

Example IO Tsubo! 600g/rt? An adhesive type hot melt adhesive having a styrene-butylene-styrene copolymer function as a hese polymer was applied to the paperboard surface to a thickness of 60 μm, and the adhesive was laminated to the easily peelable surface of the release paper. . Two sheets of paperboard with a basis weight of 600 g/rd were adhered to the back side of this paperboard using the resin emulsion of Example 1 to form a damping material layer, and in the next step, the release paper covering the front side was peeled off. Thereafter, it was laminated with a gypsum board to obtain the vibration damping and sound insulating material of the present invention.

Table 1 shows the results of measuring the loss coefficients indicating the vibration and sound insulation effects of the vibration and sound insulation materials obtained in the above Examples and Comparative Examples.

Test method for loss coefficient The loss coefficient of the vibration damping and sound insulating materials obtained in Examples and Comparative Examples was measured by changing the frequency by the mechanical impedance method. The larger the value of the loss coefficient, the greater the vibration damping and soundproofing effect. The level of the loss coefficient value varies depending on the laminated materials and layer configuration used.

Loss modulus (G”) and loss tangent (tanδ), 1
Regarding the coating film of lFI method hot melt adhesive,
1H2 using a dynamic analyzer RDA-700 (manufactured by Rheometrics Far East Co., Ltd.)
Measurement was performed at a measurement frequency of -50°C to 100°C.

(Left below) Example 11 The same vibration-damping and sound-insulating material layer as in Example 6, with 4.0 mm thick plywood on the top surface of paperboard (300 g/piece) and 9 mm thick plaster board on the bottom surface. Hot melt adhesive 20μm each
After lamination, the damping material layer and plywood were layered and laminated on the gypsum board to obtain a floor base material.

The layer structure in the above example is abbreviated as follows.

Plywood/Paperboard/HM/Paperboard/HM/Paperboard/HM/**
/Paperboard/Gypsum board/Paperboard//HM/Paperboard/**/HM
/Paperboard/HM/Paperboard/Plywood Next, the above-mentioned floor base material was fixed to the joists, and the lightweight impact sound level was lowered by placing the base material on the base material with a thickness of 1.2 m/c, showing good performance. Fig. 12 is a schematic diagram of a JIN impact sound measuring device using the vibration damping and sound insulating material of the above-mentioned example as a specimen.
300 mm), 42 is a flooring material, 43 is a vibration source or soaping machine placed on the upper surface of the flooring material, and 44 is a sound receiving measurement device. The measurement results using the same device are shown in Table 2 below and attached Figure 13.

Comparative Example 6 Light impact sound was measured in the same manner as in Example 11, except that the paperboard composite of Comparative Example 3 was used and plywood, gypsum board, and plywood were laminated using styrene-butadiene copolymer latex emulsion. . Compared to Example 11,
The effects were poor, as shown in Table 2 below and attached Figure 13.

Note that the layer structure of the comparative example is abbreviated below.

Plywood/Paperboard/EM/Paperboard/EM/Paperboard/EM/**/Paperboard/Gypsum Board/Paperboard/EM/Paperboard/**/EM/Paperboard/EM/Paperboard/Plywood Comparative Example 7 Plywood (thickness 4.0 mm) / gypsum board (thickness 9.0
mm) 7 plywood (thickness: 4.0 mm) Comparative Example 8 Gypsum boat (thickness: 21 + nm) As explained above, Example 6 and Example 11 of the above-mentioned examples were Comparative Example 3 and Comparative Examples 6 to 8
In contrast, the results of measuring the lightweight impact sound characteristics and sound transmission loss of the vibration damping and sound insulating material are also shown in graphs in attached figures 13 and 14. As is clear from the same graph, according to the present invention, superior vibration damping and soundproofing characteristics can be obtained compared to the conventional type.

[Effects of the Invention] According to the results shown in Table 1, when laminating multiple sheets of paperboard, the vibration damping and sound insulating material using hot melt adhesive as the adhesive (see Example 146.7 above) has the following effects: Comparative example 1 using conventional emulsion adhesive. 2. It can be seen that the loss coefficient is larger than that of the vibration damping and sound insulating material according to 3.4, and the vibration damping and sound insulating effect is lower. In addition, it is clear that Example 5, which used the hot melt adhesive of Example 1 and another hot melt adhesive, had better vibration damping and soundproofing effects than the comparative example using a conventional emulsion adhesive. Became.

In addition, the loss coefficient of Example 2, in which the thickness of each of the paperboard and hot melt adhesive is twice that of Example 1, is more than twice that of Example 1, and the vibration damping and soundproofing effect is greatly improved. . Furthermore, even if polyethylene is used to laminate two paperboards as in Example 3, it is possible to obtain a vibration-damping and sound-insulating material with a low profile by laminating both laminates with hot-melt adhesive. found. The loss coefficient of the plywood alone was 0.002 or less in each frequency range shown in Table 1, but the loss coefficient of the plywood using the vibration damping and sound insulating material of the present invention was good. It shows.

Furthermore, when two sheets of plasterboard (9 mm thick) were laminated together without using the paperboard vibration damping and sound insulating material of the present invention, the frequency range shown in Table 1 was 0.01 or less in all cases. However, all of the materials using the vibration-damping and sound-insulating material of the present invention show good loss coefficients, and similarly good loss coefficients are shown for calcium silicate plates.

As mentioned above, the vibration-damping and sound-insulating material of the present invention uses a hot-melt adhesive as the adhesive for laminating multiple sheets of paperboard, so it has better vibration-damping and sound-insulating effects than conventional paperboard-based laminated type vibration-damping and sound-insulating materials. It was confirmed that it is possible to obtain an excellent vibration-damping and sound-insulating material.

As a result, the problems associated with using conventional vibration damping materials such as damping rubber can be solved, and a vibration damping and sound insulating material with excellent vibration damping and sound insulating properties can be provided. Also, it is possible to obtain vibration-damping and sound-insulating materials that are effective for use in other housing equipment, home appliances, automobiles, etc.

4,

[Brief explanation of drawings]

FIG. 1a is a cross-sectional view schematically showing the non-restrictive vibration damping and sound insulating material of the present invention, and FIG. A cross-sectional diagram schematically showing a state in which it operates under the influence of airborne sound,
Figures 2a and 2b are schematic cross-sectional views showing the restraint-type vibration-damping and sound-insulating material and its behavior. body 13
FIG. 3 is a perspective view showing a state in which it is pasted on a paper, and FIG. 3 shows a single-sided type, and FIG. 4 shows a double-sided type. FIG. 5 is a front view showing an example of a kneader/ruder used when carrying out this method;
Figure 6 is a sectional view taken along the line ■-■ in Figure 5, and sections 7 to 8.
The figure is a sectional view showing an example of a slit die used when applying HM adhesive to paperboard, FIG. 9 is a sectional view showing an example of a roll coater type, and FIG. Figure 11 is a cross-sectional view of the structure of a device that laminates two sheets of paperboard with hot melt adhesive using a hot melt adhesive method. Fig. 13 is a graph showing the measurement results of the light impact sound level, and Fig. 14 shows the sound transmission loss of the vibration damping and sound insulating material veneer of the present invention and the gypsum board veneer. It is a graph showing a comparison with the board. DESCRIPTION OF SYMBOLS 11... Paperboard layer, 12... Hot melt adhesive layer, 13... Target object (material) 14... Bond for direct attachment, 20... Frame, 21... Premixer 22... - Motor, 21a... Stirring blade, 23... Kneader 124... Piping, 25... Extruder 26, 27... Laminator, 28...
Roll coater 30...storage tank, 31...
Supply pipe, 32...Feeding pump, 33...Bread, 34...Coating roll, 35...Measuring roll,
36a, 36b...Crimping roll, 37...Guide roll, 40...Specimen, 41...Joist, 42...
Flooring material, 43... Tapping, 44.
...Sound measurement device.

Claims (1)

[Claims] 1. In a paperboard-based vibration damping and sound insulating material in which at least one synthetic layer is laminated on at least one paperboard layer, the synthetic resin layer is hot-melt coated with a hot-melt coating agent or a hot-melt adhesive. A vibration-damping and sound-insulating material characterized by being formed by. 2. Paperboard with a basis weight of 250 to 650 g/m^2 is mixed with a base polymer such as ethylene-vinyl acetate copolymer, styrene copolymer, polyethylene, polyamide, polyester, polypropylene, etc., and a tackifier, plasticizer, A hot-melt adhesive that is appropriately blended with auxiliary agents such as softeners, fillers, waxes, and antioxidants, and whose loss modulus (G'') in the range of 0°C to 40°C 10＾4〜
10^8dyne/cm^2, and the loss tangent (
A hot melt adhesive having a peak value of tan δ) in the range of 0°C to 40°C and a peak value of 0.3 to 3.0 is used, and the final coating thickness is at least 30 μm. A vibration-damping and sound-insulating material characterized by being bonded. 3. Plywood, gypsum board, or laminate on one or both sides of multiple sheets of paperboard pasted and laminated using hot melt adhesive.
A vibration-damping and sound-insulating material made by laminating particle boards. 4. A vibration damping and sound insulating material characterized by kneading, melting and dehydrating hot melt adhesive using a kneader/ruder, extruding it into a thin film from a slit die and laminating it on the surface of paperboard. Manufacturing method.