KR950010584B1 - Vibration damping material and process for producing the same - Google Patents

Abstract

No content.

Description

Anti-vibration soundproof material and its manufacturing method

1A is a cross-sectional view schematically showing a non-binding vibration damping material in the present invention.

FIG. 1B is a cross-sectional view schematically showing a state in which the operation is effected by the influence of the solid front sound or the first half air from the vibration source or the noise source of the vibration damping material.

Fig. 2 (a) and Fig. 2 (b) are schematic cross-sectional views showing the restraint type vibration damping materials and their behavior.

3-4 is a perspective view which shows the state which stuck the damping soundproofing material to the to-be-adhered body 13, such as gypsum board | board, in this invention, FIG. 3 shows single sided type, and FIG. 4 shows double sided type.

5 is a front view showing an example of a kneader-ruder used in practicing the present invention.

6 is a cross-sectional view taken along the line VI-VI of FIG.

7 to 8 are cross-sectional views showing one example of a slit die used when the HM adhesive is applied to cardboard.

9 is a cross-sectional view showing an example of a roller coater method in the same manner.

10 is a skeletal cross-sectional view of an apparatus for laminating two sheets of cardboard with a hot melt adhesive in the same manner as in a roll coater method.

11 is a cross-sectional view showing the case where the antistatic soundproofing material of the present invention is applied between a gypsum board and a concrete body.

12 is a schematic diagram showing an outline of a light weight impact sound measuring apparatus.

13 is a graph showing a measurement result of a light impact sound level.

14 is a graph showing a comparison between the vibration damping soundproofing end plate and the gypsum board end plate of the present invention with respect to the sound transmission loss.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vibration suppression soundproofing material for use in building materials such as a house, an accessory of a house, a home appliance, an automobile, and the like, and a manufacturing method thereof.

In recent years, the noise of the host environment has become a problem. For example, problems in neighborhoods due to vibrations generated between partitions installed between the next doors and the upper and lower stairs are becoming social problems. The same problem is raised about the noise from household appliances such as washing machines, refrigerators, and electric appliances with rotary machines used in homes.

As a material for noise suppression and vibration suppression of this kind, a vibration damping sheet has recently been developed, which is used as a noise suppressor for enhancing the habitability of an automobile or as a side plate of an electric washing machine for the purpose. .

On the other hand, in aggregated houses such as ordinary houses made of wooden or lightweight concrete boards and mansions, it is known to attach a vibration damping rubber to gypsum board or plywood or steel sheet used for walls, ceiling surfaces, etc. of such houses.

However, in such rubber-based vibration damping materials, the thicker the thickness, the more the damping effect is recognized, but there are problems such as higher price and narrower living space when used for the interior of the house. Although it is known that a vibration material cannot be attenuated even if it is attached to the building material, a thermoplastic resin, a sheet, a nonwoven fabric, a foamed resin sheet, and the like are known for the building material, but none of the above is satisfactory.

Therefore, in recent years, proposals have been made of vibration-damping soundproofing materials obtained by laminating a plurality of sheets of cardboard with an emulsion-based adhesive such as an acrylic synthetic rubber adhesive.However, in order to improve vibration damping performance, a large amount of emulsion adhesive has to be painted. A large amount of water remains in the water, causing mold and curls. In addition, a large amount of drying energy and a long drying time are required in order to evaporate the moisture penetrated into the layer during manufacturing, and there are various problems such as poor productivity. If the evaporation of water is incomplete, the strength of the cardboard corresponding to the restraint layer of the vibration damping material decreases due to the residual moisture, and as a result, no force is applied to the viscoelastic resin layer formed between the cardboard and the cardboard. There is a problem that the torsional shear force (extension strain in the case of non-restrained type) of the vibrator is difficult to be transmitted, energy absorption by the viscoelastic resin layer is difficult, and vibration damping performance is deteriorated. Specifically, as shown in the later comparative example, even after stacking two pieces of cardboard containing 8% moisture before processing using a high solid emulsion-based adhesive, the moisture in the adhesive diffuses into the strata. The moisture is increased to 10-15%. If the strength of the cardboard of 8% moisture is 100, the strength decreases to 97 at 10% moisture and 91 at 15% moisture. In addition, when the loss coefficient of the cardboard-based composite sheet composed of cardboard / synthetic resin / paperboard using 8% moisture paper is set to 100, it is significantly reduced to 95 at 10% moisture and 88 at 15% moisture.

The object of the present invention is to solve the above problems and to provide a vibration damping soundproofing material having both vibration damping and soundproofing properties. A non-binding type vibration damping material obtained by laminating the adhesive (or simply an HM adhesive) to have a thickness of 30 µm or more after solidification, and a restraining type vibration damping material having a plurality of sheets of cardboard attached through the hot melt adhesive layer. It will include. When laminating a plurality of sheets of cardboard, the adhesive layer of at least one layer among the adhesives between the cardboard layers needs to be used as a hot melt adhesive layer having the above thickness, but other adhesive layers are emulsions other than the above. It is also possible to use system adhesives or other adhesives. However, when using emulsion-based adhesives together, it is not used as a vibration damping layer but is simply used to bond cardboard together.In this case, it is necessary to provide information about 20 µm or less in solid content so as not to add moisture as much as possible to paper. There is.

In addition, since the hot melt adhesive is extremely high in viscosity, the present invention preferably uses the latter kneader / luder to knead, melt and dehydrate, and then extrudes a thin film from a slit die. It is applied to paperboard by laminating it on the surface of the paperboard or laminating it using a gear-in die coater or roll coater. And, even when winding the cardboard laminated with a hot melt adhesive as described above, it is wound in a drum of a relatively large diameter or the laminated cardboard is cut directly by a flatbed cutting machine so as not to lower the strength of the cardboard. Should not occur.

As a cardboard used in the present invention, a relatively thick cardboard is used, and for example, a basis weight of about 250 to 650 g / m 2 is preferable.

As the adhesive, a hot melt adhesive is used. As a hot melt adhesive, a tackifier, a plasticizer, a filler, a wax, an antioxidant, etc. are mix | blended suitably with base polymers, such as a well-known ethylene vinyl acetate copolymer, a styrene copolymer, polyethylene, a polyamide, polyester, and a polypropylene, Can be used.

Hot melt teugye adhesive used in the present invention, the loss elastic modulus (G ") to 10 ⁴ to 10 points elasticity (粘彈性値) of the present inventors reviewed the results, using a temperature range (0 ℃ ~ 40 ℃) ⁸ dyne / cm 2, loss tangent (tan δ) in the range of 0 ℃ ~ 40 ℃ to form a gentle peak, it is recommended to use a hot melt adhesive having a peak value of 0.3 ~ 3.0, such hot melt In the case of using the low mold type agent, it was found that the twist of the vibration was effectively absorbed well.

Among the base polymers described above, styrene-isoprene-styrene copolymers and atactic polypropylenes are preferably used as the base polymers.

As described above, the hot melt adhesive using the vibration damping soundproofing material of the present invention is preferably selected such that its glass transition temperature (Tg) corresponds to the use temperature range, and the loss modulus (G ") and loss tangent (tan δ) are However, it is better to use the one with the characteristic such as drawing a peak without a sharp peak within the operating temperature range.

It is because when the transition region is used within the use temperature range, the polymer of the hot melt adhesive component effectively absorbs vibration energy while causing macroscopic or microentangled main and micro chains. Moreover, the usage-amount of a hot melt adhesive agent needs to make thickness after application | coating at least 30 micrometers at least.

The following describes the above-described loss modulus (G "), loss tangent (tan δ) and loss coefficient (η) in later data.

The loss coefficient is a measured value or loss indicating a negative transmission loss for a composite of a vibration damping soundproofing material, a gypsum board, a calcium silicate plate, and a composite of a vibration damping soundproofing material, such as a gypsum board and a calcium silicate plate, which are used together with the object of the present invention. Both modulus and loss tangent are viscoelastic measurements of the hot melt adhesive itself.

Incidentally, both the loss modulus and loss tangent represent the amount of energy loss, and both have the following relationship.

Loss tangent (tan δ) =

In addition, the hot melt adhesive used in the present invention is different from the emulsion adhesive, and there is no transfer of moisture into the strata after the adhesive is applied, so that there is no decrease in the strength of the paper due to it, and thus the vibration of the hot melt adhesive layer. I think that it can effectively express the energy absorption capacity and the vibration energy absorption capacity of the cardboard.

In the present invention, there are various forms of the layer structure of the damping soundproofing material, but the basic layer structure is heated as follows.

HM / Carton

Carton / HM / carton

Carton / HM / Carton / EM / Carton / HM / Carton

Carton / PE / Carton / HM / Carton / PE / Carton

Carton / HM / Carton / HM / Carton / HM / Carton

However, HM = Hot Melt Adhesive, EN = Emulsion Adhesive, PE = Polyethylene Film or Sheet, and in the layer indicated by PE, relatively high rigidity such as polypropylene, polyethylene terephthalate, polymethylpentene, etc. A high laminate resin or film may be used, and the thickness of PE at this time is preferably about 15 to 40 µm. In addition, the laminate resin or film indicated by PE is moisture-proof, and when used together, it is possible to prevent the condensation water of concrete from seeping on the gypsum board surface in the GL process wall (see Fig. 11). It is also effective in preventing mold from occurring. One side or both sides of the damping soundproofing material in which these paperboards are laminated are used with building materials such as plywood, gypsum board, steel sheet, etc. One example of the present invention will be described in detail with reference to the accompanying drawings. As a schematic representation of the vibration damping soundproof material of the present invention, reference numeral 1 denotes a cardboard layer, copper 12 a hot melt adhesive layer, and copper 13 a gripping member such as a gypsum board having a vibration damping soundproofing material having the above-described configuration. ). The same first (b) or the vibration damping material is operated under the influence of a solid front sound or a first air sound from a vibration source or a noise source, and in the case of the non-constrained type, it extends to the HM layer 12 to generate deformation. It is shown schematically. 2 (a) and 2 (b) are sectional views showing the behavior of the restrained vibration damping material as well, and the same members are indicated by the same reference numerals, and in the restraint vibration damping material, the HM layer is twisted. The deformation | transformation of a shear is shown typically. 3 to 4 are perspective views showing a state in which the vibration damping soundproofing material is attached to a packaged body 13 such as a board and the like in the present invention. FIG. 3 shows a single sided type and FIG. 4 shows a double sided type.

5 to 6 show an example of the above-described knives and luders. In the drawing, reference numeral 20 denotes a frame, 21 denotes a premixer, and a heating device is incorporated in the other parts.

(22) is a motor for driving the stirring blade (21a) in the premixer, (23) is a heater and melt-kneaded by the mixer through a pipe (24) installed in the sea portion of the premixer 21 A hot melt adhesive (hereinafter referred to as an HM adhesive) is introduced into the kneader and again uniformly kneaded and introduced into an extruder 25 with a heating device disposed on the lower portion of the kneader 23, which is then extruder. It is extruded through the supply pipe 25a attached to the side part of the tube. Incidentally, reference numeral 23a is a stirring blade provided in the kneader, and is driven by the motor 23c attached to the upper end of the attachment shaft 23b. The HM adhesive supplied through the supply pipe 25a is laminated to the cardboard 11 by the slit-die laminate 26 or 27 as shown in FIGS. Reference numeral 26 denotes a laminator for extruding the resin in the transverse direction, and reference numeral 27 denotes a panten method for flowing the resin upward.

9 shows an example of laminating an HM adhesive on the surface of the cardboard 11 by a roll coater indicated by reference numeral 28. As shown in FIG.

FIG. 10 shows another embodiment in the case of manufacturing the vibration damping soundproofing material of the present invention by a roll coater method, and reference numeral 30 denotes a reservoir of HM adhesive having an air conditioner assembled therein and is opened at the bottom of the reservoir 30. The HM adhesive in the reservoir 30 is guided to the fan 33 via the supplied supply pipe 31 and the sending pump 32 installed in the middle of the pipeline. In the fan 33, an appropriate amount of HM adhesive controlled by the nipper between the coating roll 34 and the non-rotating metering roller 35 rotating while being immersed in the molten HM adhesive is disposed. It is painted on the cardboard 11 which is running just above the coating roll 34. The laminated plate coated with the HM adhesive is overlapped with the other cardboard 11 through a pair of upper and lower compression rolls 36a and 36b disposed at the next stage, and is a vibration damping soundproof material in which two cardboards are laminated with HM adhesive. Reference numeral 37 is a guide roll for guiding the running of the laminated board. In addition, although not shown, the laminate manufactured as described above may be cut to a predetermined dimension in a plate cutter without being rolled up once again with a larger diameter on the winding drum or overlapping with another laminate or immediately after manufacture. . Again, in the one-sided laminate manufactured by the apparatus of FIGS. 7 to 9, another cardboard 11 may be attached to the exposed surface of the HM adhesive layer 12 disposed on the surface of the cardboard 11. Thus, a vibration damping soundproof material having an arbitrary number of laminated sheets is produced.

Embodiment

Next, the Example of this invention is described concretely with a comparison.

Example 1

2 sheets of cardboard having a basis weight of 300 g / m 2 were attached using a hot melt adhesive having a styrene-isoprene-styrene copolymer resin as a base polymer and having a thickness of 60 mu m of the adhesive. The laminated cardboard of sheets was bonded by a styrene-acrylic copolymer type resin emulsion (thickness of 20 micrometers after drying), and the board | substrate of 4 sheets was laminated | stacked in total, and the damping soundproofing material obtained was obtained. Plywood of thickness mm on one side of this vibration damping material. On the other side, 3 mm thick plywood was glued to each other. The viscoelasticity of the hot melt adhesive used in Example 1 was 4 × 10 ⁶ dyne / cm 2 at 5 ° C., 8 × 10 ⁵ dyne / cm 2 at 20 ° C., and loss tangent (tan δ) at 5 ° C. It was 0.7 at 1.7 and 20 degreeC. Moreover, glass transition temperature (Tg) was +0.5 degreeC.

Comparative Example 1

In Example 1, the damping soundproofing material was produced similarly to Example 1 except having used the styrene butadiene copolymer latex emulsion instead of the hot melt adhesive of two sheets of cardboard, and making thickness after drying 60 micrometers.

Example 2

In Example 1, the damping soundproofing material of the present invention was prepared in the same manner as in Example 1 except that two sheets of cardboard having a basis weight of 600 g / m 2 were used and the thickness of the hot melt adhesive used to paste the two sheets of paper was 120 μm. made.

Example 3

Two sheets of cardboard with a basis weight of 280 g / m 2 were attached with a polyethylene extrusion laminate having a thickness of 40 μm, and two sheets of laminated cardboard were bonded together using a hot melt adhesive made of a styrene-isoprene-styrene copolymer as a base polymer. Was applied so as to have a thickness of 60 µm and laminated. Subsequently, in the same manner as in Example 1, plywood was attached to the upper and lower surfaces of the laminated cardboard to make the vibration damping material of the present invention.

Example 4

Two sheets of cardboard having a basis weight of 600 g / m 2 were bonded and laminated using the hot melt adhesive, and the thickness of the adhesive layer was 60 μm, and the plywood was attached to the upper and lower surfaces of the laminated cardboard in the same manner as in Example 1. The vibration damping soundproofing material of the present invention was made.

Comparative Example 2

In Example 4, except that two sheets of paperboard having a basis weight of 600 g / m 2 were attached and laminated using a polyacrylic acid ester emulsion adhesive (60 탆 thick after drying) instead of a hot melt adhesive, the vibration damping soundproofing material was made in the same manner as in Example 4.

Example 5

In Example 1, the damping soundproofing material of the present invention was produced in exactly the same manner as in Example 1 except that a hot melt adhesive having a styrene-butyrene-styrene copolymer resin as a base polymer was used as the hot melt adhesive.

The viscoelasticity of the hot melt adhesive used here is loss elastic modulus (G ") at 5 ° C, 4.3 x 10 ⁶ dyne / cm 2, 9.1 x 10 ⁵ dyne / cm 2 at 20 ° C, and loss tangent (tan δ) 1.3 at 5 ° C. And 0.5 at 20 ° C. The glass transition temperature (Tg) was + 4.8 ° C.

Example 6

Two sheets of cardboard having a basis weight of 300 g / m 2 were attached in the same manner as in Example 1, and two sheets of laminated cardboard attached separately were bonded by using a hot melt adhesive having a styrene-isoprene-styrene copolymer as the base polymer to a thickness of 60 μm. The cardboard is made of four layers of vibration-proof soundproofing layers, and even if a four-layer laminated cardboard and a gypsum board having a thickness of 9 mm are applied to the top surface, the gypsum board having a thickness of 9 mm is attached with the hot melt adhesive (thickness 20 μm), respectively. A vibration damping soundproof material combined with

Comparative Example 3

A vibration damping soundproofing material was produced in exactly the same manner as in Example 6 except that the styrene-butadiene copolymer latex emulsion was used in place of the hot melt adhesive.

Example 7

In the same vibration damper layer as in Example 6, a calcium silicate plate having a thickness of 8 m / m was attached to the upper surface of the cardboard, and a calcium silicate plate having a thickness of 8 m / m was attached to the calcium silicate sheet with a hot melt adhesive of 20 μm. I made a vibration damping soundproof material.

[Comparative Example 4]

A damping soundproofing material was produced in exactly the same manner as in Example 7 except that a styrene-butadiene copolymer latex emulsion was used instead of the hot melt adhesive of two cardboard pastes in Example 7.

Example 8

In the structure of Example 6, it replaces the gypsum board of the back surface, and is an example used as the wall of the method of directly attaching the damping soundproofing material of this invention to a concrete body.

That is, as shown in FIG. 7, the bonds for attaching the ends of the four cardboards shown in Example 6 to the cardboard portion 11 of the back layer of the vibration damping soundproof material laminated with hot melt adhesive (HM) ( 14) was excreted at predetermined intervals and then adhered to the concrete body 13a (150 mm thick). In this case, since the HM layer forms a uniform film-like film, moisture resistance is good, and it is hard to be affected by moisture from the concrete body or water from the direct bonding bond, and the whole is not dried up in vibration suppression. Moreover, in the case of constructing again, the joining of the vibration damping materials was also good without generating a step.

[Comparative Example 5]

Except for using the styrene butadiene copolymer latex emulsion of Comparative Example 3 instead of HM in the configuration of Example 8 to obtain a vibration damping soundproofing material in exactly the same manner as in Example 8, was bonded to the concrete body (150mm thickness) in the same manner as described above. In this case, the moisture in the latex remains in the strata, and it is difficult to form a uniform continuous film of latex, and of course, the moisture resistance is low, so that the entire vibration damping material is dried by moisture from the concrete body or moisture of the bond for direct bonding. When the vibration damping materials are easily and easily fitted together at the time of construction, a step is generated and the appearance was bad.

Example 9

Bonding with the concrete body 13a in exactly the same manner as in Example 8 except that the hot melt adhesive (HM) closest to the direct bonding bond (see FIG. 7) was made of polyethylene film (thickness 40 µm) in Example 8. I was. Since the PE exhibited good moisture resistance, the same good results as in the above example were obtained.

Example 10

The peelable surface of the release paper is easily peeled off by making the styrene-butyrene-styrene copolymer function as a base polymer with a hot melt adhesive on the cardboard surface of 600g / m2 basis weight and making the adhesive hot melt adhesive 60μm thick. Attached.

Two sheets of cardboard having a basis weight of 600 g / m 2 were adhered to the back side of the cardboard with the resin emulsion of Example 1 to form a vibration damping material layer, and then peeled off the release paper covering the surface side in the next step, and then attached with gypsum board. A vibration damping soundproof material was obtained.

The loss coefficient which shows the damping soundproofing effect of the damping soundproofing material obtained by the above Example and the comparative example is shown in the following 1st table.

Test method of loss factor

The loss coefficient was measured for the vibration damping soundproofing material obtained in the Example and the comparative example by changing the frequency according to the mechanical impedance method. The larger the value of the loss factor is, the greater the damping soundproofing effect is and the level of the loss factor depends on the laminated material and the layer composition used.

How to measure loss modulus (G ") and loss tangent (tan δ)

About the coating film of a hot melt adhesive agent, it measured in the frequency range of -50 degreeC-100 degreeC of 1HZ using dynamic analyzer-DRA-700 (made by Reimetrics and White).

[Table 1]

Abbreviation Description

G = gypsum board C = calcium silicate board

HM = Hot Melt Adhesive EM = Emulsion Adhesive

PE = polyethylene

According to the results shown in Table 1, the damping soundproofing material (see Examples 1, 4, 6, and 7 above) using a hot melt adhesive as an adhesive in laminating a plurality of sheets of cardboard is compared with Comparative Examples 1 and 2 using a conventional emulsion adhesive. It can be seen that the loss coefficient is higher and the damping soundproofing effect is superior to that of the damping soundproofing material according to, 3,4.

Moreover, also about Example 5 using the hot melt adhesive of Example 1 and another hot melt adhesive, it became clear that the damping soundproof effect was superior to the comparative example 1 using the conventional emulsion adhesive.

In addition, the loss coefficient of Example 2, in which the thickness of each of the cardboard and the hot melt adhesive was doubled to that of Example 1, was twice or more than that of Example 1, and the vibration damping effect was greatly improved. Moreover, even if polyethylene was used for lamination of two sheets of cardboard as in Example 3, it was found that excellent vibration damping material can be obtained by sticking both laminated cardboards with a hot melt adhesive. The loss coefficient of the plywood alone was 0.002 or less in each of the frequency ranges shown in the first table. However, any of the vibration damping materials used in the present invention showed a good loss coefficient.

Also, two gypsum boards (9 mm thick) were attached without using the paperboard vibration damper according to the present invention, but all of them were 0.01 or less in the frequency range shown in the first table. It shows the same good loss coefficient for calcium silicate plate.

Example 11

In the same vibration damping material layer as in Example 6, when the plywood having a thickness of 4.0 mm is placed on the upper surface of the cardboard (300 g / m 2), a gypsum board having a thickness of 9 mm is attached with a hot melt adhesive of 20 μm, and then the vibration damping material is placed on the gypsum board surface. The layer and the plywood were laminated together and used as the base material for floors.

Next, the layer structure in the above embodiment is abbreviated as follows.

Bout / Carton / HM / Carton / HM / Carton / HM / Carton / Gypsum Board / Carton / HM / Carton / HM / Carton / HM / Carton / Plywood Above, the level for light impact by thickness 12m / c fell, and showed favorable performance.

12 is a schematic diagram of a measurement impact sound measuring apparatus using the vibration damping soundproofing material of the above embodiment, and reference numeral 40 in the drawing is a specimen fixed on a dongle 41 (space = l of 300 mm). 42 is a flooring material, 43 is a vibration source mounted on an upper surface of the flooring material, and 44 is a sound absorbing measuring device. The measurement results using the same apparatus are as shown in the second table below and in FIG.

Comparative Example 6

Lightweight impact sound was measured in the same manner as in Example 11 except that the cardboard composite of Comparative Example 3 was pasted with plywood, gypsum board, and plywood using a styrene-butadiene copolymer latex emulsion.

Compared with Example 11, the effect is poor, as shown in the second table below and FIG. Moreover, the layer structure of the said comparative example is abbreviate | omitted.

Plywood / Carton / EM / Carton / EM / Carton / EM / Carton / Gypsum Board / Carton / EM / Carton / EM / Carton / EM / Carton / Plywood

Comparative Example 7

Plywood (Thickness 4.0mm) / Gypsum Board (Thickness 9.0mm) / Plywood (Thickness 4.0mm)

Comparative Example 8

Gypsum board (thickness 21mm)

[Table 2]

The frequency is Hz and the number in the table indicates the decibel (dB).

[Table 3]

The frequency is Hz and the number in the table indicates the decibel (dB).

As described above, Examples 6 and 11 of the above Examples were compared with Comparative Examples 3 and 6 to 8, and the results of measuring the light impact characteristics and the sound transmission loss of the vibration damping soundproof material are shown in FIG. It is also graphed in FIG.

As is also clear from the graph, according to the present invention, excellent vibration damping and soundproofing characteristics can be obtained as compared with the conventional type.

As described above, it has been confirmed that the vibration damping soundproofing material of the present invention can obtain a vibration damping soundproofing material having superior vibration damping effect than the conventional paperboard stacking type vibration damping soundproofing material by using a hot melt adhesive as an adhesive for stacking a plurality of sheets of cardboard. .

As a result, the problems associated with the use of vibration damping materials, such as vibration damping rubber, can be eliminated, and vibration damping materials with excellent vibration damping sound resistance can be provided, and they can be used in building materials such as houses and other home appliances, home electronic products, and automobiles. An effective vibration damping material is obtained.

Claims (4)

A paper-based vibration damping soundproofing material in which at least one synthetic resin layer is laminated on at least one paperboard, wherein the synthetic resin layer is formed by hot-melting a hot melt coating agent or a hot melt adhesive. A cardboard having a basis weight of 250 to 650 g / m 2 is coated on a base polymer such as ethylene-vinyl acetate copolymer, styrene copolymer, polyethylene, polyamide, polyester, polypropylene, adhesive agent, plasticizer, softener, filler, expansion It is a hot melt adhesive prepared by appropriately blending preparations such as slew and antioxidant, and the loss modulus (G ″) of the easy adhesive is in the range of 0 ° C to 40 ° C of 10 ⁴ to 10 ⁸ dyne / cm 2. In addition, the peak of loss tangent (tan δ) is in the range of 0 ° C to 40 ° C of, and a hot melt adhesive whose peak value is 0.3 to 3.0 is used, and the coating thickness is at least 30 μm, Vibration damping material characterized in that. A vibration damping soundproofing material made of plywood, gypsum board, and particle board on one or both sides of a stack of sheets of cardboard with hot melt adhesive. A method for producing a vibration damping soundproofing material comprising: hot melt adhesive is kneaded, melted, and dehydrated using a kneader luder, and then laminated on the surface of a paperboard while being extruded from a slit die into a thin film.