JP2642126B2 - Soundproof and safety glass structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a soundproof / safety glass structure, in particular, a viscoelastic composition is provided on one side of a reinforcing film, and a glass plate is laminated on the composition. integrated becomes, the tensile elastic modulus at room temperature of reinforcing film is 1.0 to 10 ⁹
dyne / cm ² or more, the viscoelastic composition comprises a butyl rubber-based or thermoplastic block copolymer rubber-based rubber component, a tackifier resin, a softener component, and a crosslinking agent, and a rubber component 100
To the parts by weight, the tackifier resin and the softener component 20 to
600 parts by weight, and the thickness is 0.05 mm or more,
Tensile modulus at room temperature is 1 × 10 ⁶ to 1 × 10 ⁹ dyne / cm ²
And a glass structure having a loss tangent of at least 0.5, which is characterized by curing the structure.
Buildings in contact with the harbor, factory interior and its surroundings, and nearby buildings such as expressways, arterial roads, railways, etc., as well as structures that require soundproofing in sound facilities, playgrounds, piano lessons, etc., and urban areas The present invention also relates to a soundproof / safety glass structure used for medium- and high-rise buildings requiring high safety in places with high publicity, as well as buses, trains, and passenger cars.

(Prior art) Conventionally, viscoelastic compositions generally used as soundproofing / safety glass structures are roughly classified into two types.

One is a multi-liquid mixed liquid intermediate material, which is injected between two pieces of glass whose ends are sealed and hardened and integrated. This type has a number of disadvantages listed below.

Since it contains a large amount of low-boiling monomers that are harmful to the human body, additional equipment such as a local exhaust device and explosion-proof storage equipment is required in the production of laminated glass, and the production cost is high.

When injecting the intermediate material, the injection speed is limited to avoid mixing of air bubbles, and the productivity is low.

When curing the intermediate material, it must be cured on a smooth surface to make the intermediate layer uniform, and it must be left still so as not to hinder the curing. Take it.

In addition, since the temperature of the intermediate material rises due to the heat of reaction during curing, cooling equipment is indispensable in manufacturing.

The other is a polyvinyl butyral-based sheet-like intermediate material, which is sandwiched between two pieces of glass and closely adhered and integrated by heat melting.

This type also has various disadvantages listed below.

Since the safety performance is greatly affected by the moisture content of the intermediate material at the time of manufacturing, the humidity must be strictly controlled, which is troublesome and expensive.

In terms of performance, the peak of the loss characteristic, which is a factor that affects the soundproofing and safety performance, is at a high temperature (40 ° C or more), and at the most commonly experienced environmental temperature (0 ° C to 25 ° C). In this case, the loss characteristics are extremely reduced, and as a result, the performance of soundproofing and safety is significantly reduced.

(Purpose of the Invention) As listed above, all of the soundproof and safety glass structures according to the prior art have various problems.

It is therefore an object of the present invention to overcome the disadvantages of the prior art and to provide a soundproof and safe glass structure which is extremely easy to manufacture and which functions very effectively over a wide temperature range.

(Structure of the Invention) The reinforcing film 1 used in the present invention is a transparent or translucent film, and has a tensile modulus at room temperature of 1.0.
Any type can be used as long as it is a film of × 10 ⁹ dyne / cm ³ or more, but polyethylene, ionomer, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polychlorinated Vinyl, vinyl chloride-propylene copolymer, polystyrene, vinylidene chloride-vinyl chloride copolymer, polyester, Saran coated polyester, nylon 6,6, polyurethane, polyvinyl alcohol, polycarbonate, ethylene-vinyl alcohol copolymer, cellophane, nylon 6
Etc. are preferably used. The thickness of the film may be 0.02 mm or more. The color is not particularly limited, and may be colored with various pigments depending on the use, or may be printed on the surface of the reinforcing film for the purpose of decoration or advertisement. Further, for the purpose of heat ray reflection or electromagnetic wave shielding, the surface of the reinforcing film may be subjected to vapor deposition, plasma coating or various coatings. Further, for the purpose of improving the affinity with the viscoelastic composition, those obtained by subjecting a film to various surface treatments are also suitably used.

The viscoelastic composition used in the present invention uses a butyl rubber type or a thermoplastic block copolymer rubber type as a rubber component. As used herein, the term "butyl rubber" refers to butyl rubber, chlorobutyl rubber, and bromobutyl rubber. The term "thermoplastic block copolymer rubber" refers to a block copolymer rubber such as styrene-butadiene, styrene-isoprene, and styrene-ethylene-butylene.

Adhesive and the imparting material resin and softening agent used in the present invention, the rosin as a tackifier resin, ester gas, ester gum H, polyterpene resins, C ₅ petroleum resins, C ₉ petroleum resins, dicyclopentadiene-based petroleum resin , A styrene-based resin, an alkylphenol resin, a terpene phenol resin, and the like are suitably used. Among them, the use of a hydrogenated saturated tackifier resin is effective in improving weather resistance. As a softener,
Plasticizers represented by phthalates, sebacates, and adipic esters, paraffin wax, petrolatum, ozokerite, polybutene, low-polymerized polyisobutylene, low-polymerized polyvinylisobutylether, lanolin, process oil, and the like are preferable. Used for

The ratio of the rubber component to the tackifier resin and the softener component is 20 to 600 parts by weight with respect to 100 parts by weight of the former. If it exceeds 600 parts by weight, the film strength of the viscoelastic composition will be significantly reduced, and the safety performance will be reduced.

In order to provide a crosslinked structure to the above main components, ketone-
Organic peroxides such as peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, dialkyl peroxides, dialkyl peroxides, peroxyesters, peroxydicarbonates,
Add amine, urea, sulfur compound, nitrile, phosphorus compound, chlorine compound and other photosensitizers and polyfunctional isocyanate compounds, and polyfunctional monomers as auxiliary agents to promote crosslinking. Gives a crosslinked structure.

In addition, a coloring agent, an antioxidant and the like can be added.

The thickness of the viscoelastic composition may be 0.05 mm or more on one side when a reinforcing film is provided. If it is less than this, the safety performance is reduced. In addition, when the reinforcing film is provided as an exterior, the thickness is required to be 0.1 mm or more. If it is less than this, the safety performance is reduced.

In addition, by applying an embossed pattern to at least one surface of the viscoelastic composition before lamination with glass, it is possible to extremely easily perform air-releasing compression during lamination with glass.

There are no particular restrictions on the embossed pattern here, but as shown in FIG. 4, x is 0.05 mm or more and y is 0.001 mm.
It would be fine if more.

In addition, the planar shape of the embossed pattern is not particularly limited,
Round, square, rectangular, rhombic, elliptical, hexagonal, octagonal, and the like are common.

Furthermore, it is also possible to integrate the glass while maintaining the embossed pattern by adjusting the pressing force at the time of laminating and integrating with the glass. At this time, the incident light is irregularly reflected or irregularly refracted on the embossed pattern, and is strong in summer and the like. It is possible to suppress sunlight from entering the room.

Next, FIG. 3 shows a typical example of the soundproof / safety glass structure according to the present invention. FIG. 3 shows a viscoelastic composition in which a reinforcing film is interposed between two sheets of glass, which are integrated by sandwiching. The glass used may have the same thickness or a different thickness. Further, a plurality of viscoelastic compositions in which a reinforcing film is provided inside the structure shown in FIG. 3 and glass may be laminated and used. Further, an air layer may be provided between the two structural bodies shown in FIG. 3 to form a multi-layer vitrified glass. FIG. 6 shows a viscoelastic composition in which a reinforcing film is interposed between two glass sheets to be integrated. This is obtained by laminating and integrating a viscoelastic composition in which a reinforcing film is externally processed and an embossed pattern in advance on the formed structure. By attaching the upper side of FIG. 6 to the indoor side, the glass can be prevented from scattering to the indoor side in the event that the glass is broken, and it is also very effective in preventing injury to the human body.

(Example) Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Table 1 shows the reinforcing films used in this example. However, the reinforcing film of code No. F-2 in Table 1 is a comparative example.

The viscoelastic composition was adjusted based on Table 2 and kneaded with a roll mill set at 90 ° C. However, Table 2
The viscoelastic compositions, the tensile modulus (dyne / cm ² ), and the loss tangent of the code Nos. M-4, M-5 and M-10 in Table 5 are comparative examples.

As a method of applying the kneaded material to one or both surfaces of the reinforcing film, a laminating method of laminating a sheet having a predetermined thickness by using a roll, a flow coating method using an extruder and a die, or a lip method is used. A method of coating by a die coating method, a doctor coat method, a roll coater method, or the like is preferably used.
This was performed by a doctor coat method using a knife edge having a width of 600 mm. Apply the sheet adjusted as described above as it is or with a mold having a predetermined embossed pattern, press it between presses or squeezing rolls and apply embossing to 3.0 m
It was laminated with a float glass having a thickness of m, and air-pressed and pressed between rubber rolls. In addition to the integration method using a rubber roll, integration in a vacuum laminator or an autoclave is also possible.

The integrated structure was subjected to UV curing or peroxide curing at room temperature or by heating to give a crosslinked structure, and various performances were compared.

In adjusting these test materials, there is no need for any auxiliary equipment such as the local exhaust device and explosion-proof storage equipment mentioned in the prior art described above, and it is not necessary to control the temperature and humidity at the time of lamination and integration. There is no restriction on the location at the time of lamination integration for uniform layer,
Therefore, according to the present invention, it is possible to manufacture a laminated glass structure very easily at low cost and with high productivity.

Comparison of safety performance Laminated glass structures each having a size of 600 mm square with the configuration shown in Table 3 were prepared and subjected to a penetration resistance test at 25 ° C based on JIS-R3205 (Table 4). Table 2 shows the values of the tensile modulus at 25 ° C. and the loss tangent of each material shown in Table 2.

Hereinafter, the test results will be described in detail.

All examples comprising the composition and the structure according to the present invention passed the penetration resistance test based on JIS-R3205.

If the composition deviates from the limited range of 20 to 600 parts by weight of the tackifier resin and the softener component with respect to 100 parts by weight of the rubber component, the penetration resistance is significantly reduced as shown in Comparative Examples 3 and 4.

The tensile modulus and loss tangent at 25 ° C. of the composition that passed the penetration resistance test were 1 × 10 ⁶ to 1 × 10 ⁹ dyne, respectively.
/ cm ² , which is 0.5 or more, within the limited area in the present invention.

Not only in Examples 1 to 7 in which the reinforcing film was provided, but also in a viscoelastic composition in which the viscoelastic composition in which the reinforcing film was provided was sandwiched between two pieces of glass, and the reinforcing film was provided on the outside thereof. A structure obtained by laminating and integrating a film preliminarily embossed (Example 8) also passed the test, and a structure obtained by laminating a viscoelastic composition in which a reinforcing film was provided on a single glass plate (Example 9) ) Also cleared this test. In particular, with respect to Example 8, when falling,
There is no scattering of glass on the collision side, and it is extremely smooth when palpating the falling spherical surface.When applied to a living room or a vehicle, it will prevent abrasion of the human body and dramatically improve safety. Connect.

Tensile modulus at 25 ° C of the reinforcing film is 1 × 10 ⁹ d
This test is not cleared with a film of yne / cm ² or less (Comparative Example 2).

As described above, the structure according to the present invention makes it possible to provide a highly safe safety glass structure for the first time.

Comparison of sound insulation performance The sound insulation performance of a soundproof laminated glass structure is generally evaluated based on the magnitude of sound insulation represented by a parameter called transmission loss. It is a generally known fact that the transmission loss is substantially determined by the mass of the material, but is a factor determined by the magnitude of the loss coefficient of the material when the mass is the same.

Thus, the loss coefficient was measured for some of the examples and comparative examples, and the soundproofing performance was compared in the graph of FIG. Table 6 shows the compared structures.

The loss coefficient was measured using an AVA-IV vibration analyzer manufactured by Akashi Seisakusho using the half width of each resonance peak of a resonance curve drawn by sweeping the frequency from 10 Hz to 3000 Hz. Further, the temperature was measured while changing the temperature, and the loss coefficient at 500 Hz at each temperature was plotted.

As can be seen from FIG. 7, the soundproof / safety glass structure according to the present invention shows a remarkably large loss coefficient as compared with Comparative Example 5 which is a conventional commercially available laminated glass, and this value is unprecedented. Things.

In addition, Comparative Column 5 has a loss factor peak at a very high temperature of 40 ° C., which deviates significantly from the most commonly experienced environmental temperatures (0-25 ° C.), which greatly limits the operating environment Will be done. In addition, the effective temperature range (loss coefficient of 0.1 or more) as the soundproof glass is extremely narrow at 26 ° C., which not only limits the use environment but also functions only in a narrow temperature range.

However, in Examples 1 and 4, the peak temperature of the loss coefficient was around 20 ° C, and the effective temperature range was 40 ° C to 45 ° C.
And shows an unprecedented value.

Although the present invention has been described in detail with reference to the embodiments, examples of the embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited thereto.

1 to 3 each show a soundproof / safety glass structure according to the present invention. FIG. 1 shows a viscoelastic composition 2 provided on one side of a reinforcing film 1, FIG. 2 is a schematic vertical cross-sectional view of a structure in which glass 3 is laminated and integrated. FIG. 2 shows a viscoelastic composition 2, 2 in which a reinforcing film 1 is provided, and a glass 3 is laminated on one side and a reinforcing film is laminated on the other side. FIG. 3 is a schematic longitudinal sectional view of an integrated structure, FIG. 3 is a schematic longitudinal sectional view of a structure in which glass 3 is laminated and integrated in place of the outer reinforcing film 1 of FIG. 2, and FIG. FIG. 5 is a schematic vertical sectional view showing an embossed pattern 4 on one side of a viscoelastic composition, and FIGS. 5 and 6 are views showing another embodiment of the structure according to the present invention. The figure shows the reinforcing film 1
FIG. 6 is a schematic vertical cross-sectional view of a structure in which an embossed pattern 4 is applied to one surface of two viscoelastic compositions 2 and 2 in which glass is laminated, and glass is laminated and integrated on the compositions 2 and 2, respectively. 3 is a schematic vertical cross-sectional view of a structure in which a viscoelastic composition 2 having an embossed pattern 4 on one glass 3 of the structure shown in FIG. 3 and a reinforcing film are further laminated and integrated thereon.

In addition to the above, the soundproof / safety glass structure according to the present invention further comprises a glass or reinforcing film 1 laminated and integrated via a viscoelastic composition 2 or a viscoelastic composition with an embossed pattern 4 to achieve the desired soundproof / safety. It can be a glass structure.

[Brief description of the drawings]

In the accompanying drawings, FIGS. 1 to 3 and FIGS. 5 and 6 are schematic cross-sectional views each showing an embodiment of the soundproof / safety glass structure according to the present invention, and FIG. 4 shows an embossed pattern in the viscoelastic composition. And FIG. 7 is a graph showing the relationship between the temperature and the loss coefficient of the structure according to the present invention and the structure according to the comparative example. Note that the correspondence between the illustrated main parts and reference numerals is as follows. 1 ... reinforcing film, 2 ... viscoelastic composition, 3 ... glass, 4 ... embossed pattern.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshio Honda 1562-34 Ninomiya, Akikawa-shi, Tokyo (56) References JP-A-60-8059 (JP, A) JP-A-59-223256 (JP, A) 58-67440 (JP, A) JP-B 48-22813 (JP, B1)

Claims (5)

(57) [Claims] 1. A viscoelastic composition is packaged on one side of a reinforcing film, and a glass plate is laminated and integrated on the composition, and the tensile elastic modulus at room temperature of the reinforcing film is 1.0 × 1.
0 ⁹ dyne / cm ² or more, wherein the viscoelastic composition comprises a rubber component composed of a butyl rubber-based or thermoplastic block copolymer rubber-based, a tackifier resin, a softener component, and a cross-linking agent. component
For 100 parts by weight, the tackifier resin and the softener component are 20 to 600 parts by weight, and the thickness is 0.05 m
m or more, and the tensile modulus at room temperature is 1 × 10 ⁶ to 1
A soundproof / safety glass structure obtained by curing a structure having a range of × 10 ⁹ dyne / cm ² and a loss tangent of 0.5 or more. 2. The structure according to claim 1, wherein the viscoelastic composition containing the reinforcing film has a glass plate on one surface and a reinforcing film on the other surface. Soundproof and safety glass structure. 3. The soundproof / safety glass structure according to claim 1, wherein the structure is formed by laminating and integrating glass plates on both sides of a viscoelastic composition containing a reinforcing film. 4. The soundproof / safety glass according to claim 1, wherein the structure is formed by laminating and integrating a viscoelastic composition and a reinforcing film on a glass surface. Structure. 5. The soundproofing / safety glass structure according to any one of (1) to (4), wherein the structure is preliminarily embossed on at least one side surface of the viscoelastic composition.