JP2018058305A - Bilayer resin glass - Google Patents

Abstract

An object of the present invention is to provide a multilayer resin glass that exhibits excellent sound insulation against low frequency band (about 100 to 700 Hz) sound and high frequency band (about 10,000 Hz or higher) sound. An intermediate layer made of a transparent resin material different from a resin material constituting the transparent resin plates is interposed between two transparent resin plates, and ribs project on one surface as the transparent resin plates. A multi-layered resin glass was constructed using what was provided. [Selection] Figure 8

Description

  The present invention relates to a multilayer resin glass, and more particularly to a multilayer resin glass suitably used in an automotive window unit.

  Conventionally, various structures and the like for preventing the intrusion of noise from the outside have been proposed in order to make the interior of an automobile more quiet.

  For example, in Patent Document 1 (Japanese Patent No. 4463737), an intermediate layer film made of a thermoplastic resin having predetermined physical properties is bonded to two glass plates as a method for preventing solid propagation noise of a vehicle. It has been proposed to use laminated windows that are made up of. Patent Document 2 (Japanese Patent No. 4101097) relates to a technique for preventing transmitted sound on the rear surface of a track cab, and in the rear window of the track cab, a weather strip fitted to a rear window opening is fitted into a window glass. A track cab rear window characterized in that a transmitted sound preventing member including a sound absorbing material is fitted in the groove, and the transmitted sound preventing member is formed so that the surface of the sound absorbing material is sandwiched between two plates. A transmitted sound prevention structure has been proposed. Furthermore, in patent document 3 (Unexamined-Japanese-Patent No. 2006-29071), the thing including the bracket provided with the adjusted mass damper is proposed as a window frame which can reduce the noise which passes the window glass of a vehicle.

  In recent years, in order to reduce the weight of automobiles, the use of various types of window glass in automobiles, in other words, the use of resin glass has been studied, and has already been adopted in some vehicle types.

  By the way, what has various structures is proposed conventionally about the multilayer glass etc. which are used suitably as a soundproof window etc. in a building, and were excellent in the sound-insulating property. For example, in patent document 4 (Unexamined-Japanese-Patent No. 2010-265129), a pair of glass plate which comprises a multilayer glass consists of laminated glass which has a wire mesh glass and a resin intermediate layer, and a wire mesh glass is thinner than a laminated glass. In addition, a sound insulating double-glazed glass characterized in that helium is enclosed in a hollow layer located between a glass with a wire mesh and a laminated glass is proposed in Patent Document 5 (Japanese Patent No. 2647299). Is a transparent sound insulating plate in which at least two transparent gel layers made of a polymer that transmits visible light and has elasticity are laminated between two transparent plates, and the elasticity of each transparent gel layer is different, Proposed.

Japanese Patent No. 4463837 Japanese Patent No. 4101097 JP 2006-29071 A JP 2010-265129 A Japanese Patent No. 2647299

  Under these circumstances, the present inventors diligently researched the adoption of resin glass as a window glass for automobiles. As a result, conventional resin glass composed of a single layer (on a single synthetic resin plate). In the case of resin glass), it has a problem that it easily transmits sound having a frequency of about 100 to 700 Hz and sound having a frequency exceeding about 10000 Hz as compared with inorganic glass. ,Admitted. That is, the conventional single-layer resin glass has a sound of a relatively low frequency range (hereinafter referred to as a low frequency band) of about 100 to 700 Hz in a human audible range of about 20 to 20000 Hz. The sound insulation property against sound and the sound insulation property against sound in a relatively high frequency region (hereinafter referred to as a high frequency band) of about 10,000 Hz or higher are inferior to those of inorganic glass. Here, the decrease in the sound insulation against the low frequency band sound is caused by the rigidity of the entire resin glass, and such a low frequency band sound region is referred to as a (resin) stiffness region. In addition, the decrease in sound insulation against high-frequency sound is due to the occurrence of a coincidence effect in resin glass, and such a high-frequency sound region is referred to as a (resin) coincidence region. .

  Here, the present invention has been made in the background of such circumstances, and the problem to be solved is that the sound in the low frequency band (about 100 to 700 Hz) and the high frequency band (about 10000 Hz or more). ) To provide a multilayer resin glass that exhibits excellent sound insulation.

  And in order to solve this subject, this invention has the intermediate | middle layer which consists of a transparent resin material different from the resin material which comprises those transparent resin plates between two transparent resin plates, and these two transparent resin plates The gist of the invention is a multilayer resin glass characterized in that each of the resin plates has ribs protruding on one surface.

  In a preferred first aspect of the multilayer resin glass according to the present invention, the two transparent resin plates are arranged so that the surfaces on which the ribs are provided face each other, and one transparent resin is provided. In a state where the rib formed on the plate does not contact the other transparent resin plate, the rib is disposed with the intermediate layer interposed therebetween.

  Moreover, in the preferable 2nd aspect of the multilayer resin glass according to this invention, the said intermediate | middle layer is formed with the ethylene-vinyl acetate copolymer.

  On the other hand, this invention also makes the summary the window unit for motor vehicles which has the multilayer resin glass of each above-mentioned aspect.

  Thus, in the multilayer resin glass according to the present invention, it has an intermediate layer made of a transparent resin material different from the resin material constituting the transparent resin plate between the two transparent resin plates, As such a transparent resin plate, a plate formed by protruding ribs on one surface is used. By adopting such a configuration, 1) it is possible to effectively block high-frequency noise (noise with a sound range of 10000 Hz or more) by the presence of the intermediate layer, and 2) on the transparent resin plate. The rigidity of the transparent resin plate is advantageously improved by the provided ribs, and therefore, it is possible to effectively block low frequency band noise (noise of about 100 to 700 Hz). It has become.

It is a top view which shows an example of the multilayer resin glass according to this invention. It is a bottom view which shows an example of the multilayer resin glass according to this invention. It is a front view which shows an example of the multilayer resin glass according to this invention. It is a top view of one transparent resin board which comprises the multilayer resin glass shown by FIG. It is a bottom view of one transparent resin board which comprises the multilayer resin glass shown by FIG. It is a top view of another transparent resin board which comprises the multilayer resin glass shown by FIG. It is a bottom view of the other transparent resin board which comprises the multilayer resin glass shown by FIG. It is a partial expanded sectional view in the AA surface of FIG. It is a top view which shows an example of the window unit for motor vehicles which has the multilayer resin glass shown by FIG. FIG. 10 is a partially enlarged cross-sectional view taken along the BB plane of FIG. It is a graph which shows the result of a sound transmission loss test.

  Hereinafter, representative embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

  First, FIG. 1 to FIG. 3 show a multilayer resin glass 10 for an automobile front quarter window as an embodiment of the multilayer resin glass according to the present invention. In the bottom view, FIG. 3 shows a front view. Among these drawings, as is clear from FIG. 3 in particular, the multilayer resin glass 10 has a laminated structure having an intermediate layer 16 between the first transparent resin plate 12 and the second transparent resin plate 14. As a whole, it has a substantially triangular flat plate form. In order to facilitate understanding of the present invention, in FIG. 1, the first transparent resin plate 12 is formed on the surface on the intermediate layer 16 side (hereinafter referred to as the lower surface of the first transparent resin plate 12). In FIG. 2, ribs 22 formed on the surface of the second transparent resin plate 14 on the intermediate layer 14 side (hereinafter referred to as the upper surface of the second transparent resin plate 14). , Respectively, are indicated by dotted lines.

  In order to describe each member constituting the multilayer resin glass 10 in detail, as shown in FIGS. 4 and 5, the first transparent resin plate 12 includes a main body 20 and an annular protrusion 18a. And a rib 18 composed of a plurality of protrusions 18b. The annular protrusion 18 a and the protrusion 18 b constituting the rib 18 are both formed integrally with the main body 20 on one surface of the main body 20. The annular protrusion 18a is erected so as to extend substantially along the outer peripheral edge at a position away from the outer peripheral edge of the main body part 20 by a plurality of (in the present embodiment, twelve) protrusions. 18b is formed in the form which protruded toward the outer periphery side of the main-body part 20 from the cyclic | annular protrusion 18a. In addition, the protrusion height from the main-body part 20 of the protrusion 18b is made low compared with the protrusion height from the main-body part 20 of the cyclic | annular protrusion 18a (refer FIG. 8).

  On the other hand, as is apparent from FIGS. 6 and 7, the second transparent resin plate 14 includes a main body 24 and ribs 22 formed integrally with the main body 24 on one surface of the main body 24. And is composed of. Similar to the annular protrusion 18a formed on the first transparent resin plate 12 described above, the rib 22 is substantially at a position away from the outer peripheral edge of the main body 24 of the second transparent resin plate 14 by a predetermined distance. Although it is erected along the outer peripheral edge, the distance from the outer peripheral edge of the main body 24 to the rib 22 (the distance from the outer peripheral edge) of the main body 20 in the first transparent resin plate 12 is as follows. The distance from the outer peripheral edge to the annular protrusion 18a (the distance from the outer peripheral edge) is shorter (see FIG. 8).

  And the surface of the side in which the rib 18 (annular protrusion 18a, protrusion 18b) in the 1st transparent resin board 12 mentioned above is formed, and the rib 22 in the 2nd transparent resin board 14 are formed. As shown in FIG. 8, an intermediate layer 16 made of a transparent resin material different from the resin material constituting the transparent resin plates 12 and 14 is formed between the ribs 18 (annular protrusions 18a and protrusions). 18b) and the rib 22 are interposed so as not to contact each other, whereby the multilayer resin glass 10 according to the present invention is constituted.

  Thus, in the multilayer resin glass 10 according to the present invention, a transparent resin material different from the resin material constituting the transparent resin plates 12 and 14 between the two transparent resin plates 12 and 14. Therefore, the presence of such an intermediate layer effectively blocks high-frequency noise (noise having a sound range of 10,000 Hz or more). Further, the two transparent resin plates 12 and 14 are provided with ribs projecting on the opposing surfaces, and the rigidity of each transparent resin plate is effectively improved by the ribs. Since the ribs formed on the transparent resin plate are configured so as not to contact each other, even in low frequency band noise (noise of about 100 to 700 Hz), it is effectively blocked. It will be.

  Here, as a resin material which comprises the 1st transparent resin board 12 (the main-body part 20 and the rib 18), and the resin material which comprises the 2nd transparent resin board 14 (the main-body part 24 and the rib 22), it has hitherto been known. Any transparent resin material used as resin glass can be used as long as it can form a plate-like body. Examples of such transparent resin materials include polycarbonate, polyacrylate, polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, polyolefin, acrylonitrile-butadiene-styrene copolymer (ABS), etc. Among the resin materials, the transparent resin material to be used is determined in consideration of various characteristics (for example, transparency, hardness, impact resistance, etc.) required according to the application of the multilayer resin glass. It becomes. In the present invention, the resin material constituting the first transparent resin plate 12 and the resin material constituting the second transparent resin plate 14 may of course be the same. Also good.

  Moreover, in the multilayer resin glass (10) according to the present invention, the intermediate layer (16) has two transparent resin plates for the purpose of effectively blocking high-frequency noise (noise having a sound range of 10,000 Hz or more). (12, 14). Therefore, in the present invention, the transparent resin material constituting the intermediate layer is preferably a resin material having flexibility and elasticity as well as transparency, and further has UV resistance and excellent adhesiveness. More preferably, the resin material also has. Examples of the transparent resin material constituting the intermediate layer in the present invention include ethylene-vinyl acetate copolymer (EVA) and polyvinyl butyral.

  Furthermore, in the multilayer resin glass (10) of the present invention, the thickness of each of the first transparent resin plate (12), the second transparent resin plate (14) and the intermediate layer (16), and the first The protruding height of the rib (18) in the transparent resin plate (12) (the protruding height of each of the annular portion 18a and the protruding portion 18b), and further the protruding height of the rib (22) in the second transparent resin plate (14). Is appropriately determined according to the characteristics required for the multilayer resin glass (10).

  In addition, the multilayer resin glass 10 which has been described above can be manufactured by appropriately combining various conventionally known methods. For example, according to the in-mold molding method, while forming a molded body in which the intermediate layer 16 made of a predetermined transparent resin material is provided on the surface of the first transparent resin plate 12 on which the ribs 18 are formed, The second transparent resin plate 14 having the ribs 22 on one surface is formed according to a more known method. And the multilayer resin glass 10 is made by integrating the surface by the side of the intermediate | middle layer 16 in a molded object, and the surface by which the rib 22 in the 2nd transparent resin board 14 was provided in contact. It is possible to manufacture.

  FIG. 9 is a plan view of a window unit 30 for a front quarter window of an automobile having the above-described multilayer resin glass 10 as a resin glass portion. FIG. 10 is an explanatory diagram in which a cross section taken along the plane B-B in FIG. 9 is partially enlarged. The BB plane in FIG. 9 corresponds to the AA plane in FIG.

  As is clear from FIGS. 9 and 10, in the window unit 30, the molding 32 is disposed on the outer peripheral portion of the multilayer resin glass 10. The molding 32 is formed of a material softer than the resin material constituting the two transparent resin plates 10 and 14 of the multilayer resin glass 10. For example, the molding 32 is formed by using a soft resin material such as soft polyvinyl chloride, a rubber material, various elastomer materials, a blended material thereof, or the like. The molding 32 is fixed to the outer peripheral portion of the multilayer resin glass 10.

  Further, a colored frame 34 is formed on a portion of the periphery of the surface of the first transparent resin plate 12 (the surface on which the rib 18 is not provided) that is not covered with the molding 32. In addition, although the material which comprises the colored frame 34 is not specifically limited, It is desirable that the color is dark colors, such as black and amber. By making the colored frame body 34 dark, it exhibits excellent UV-cutting properties and is provided on the ribs 18 provided on the first transparent resin plate 12 and the second transparent resin plate 14 from within the vehicle. It is possible to advantageously prevent the ribs 22 from being visually recognized.

  In addition, a plurality of (three in this embodiment) locking clips 36 are assembled to the peripheral portion of the surface of the first transparent resin plate 12 (the surface on which the ribs 18 are not provided), With these locking clips 36, the window unit 30 is attached to a frame installed at the opening of the front quarter window of the automobile. By such attachment, the first transparent resin plate 12 side in the window unit 30 is inside the vehicle, and the second transparent resin plate 14 side is outside the vehicle.

  And in such a window unit 30, since the resin glass part is comprised with the multilayer resin glass according to this invention, the effect of this invention mentioned above, specifically, a low frequency band In addition, it is possible to effectively block both high frequency band noise and noise.

  Moreover, the window unit 30 has the colored frame 34, and the visual recognition of the rib 18 provided in the 1st transparent resin board 12 and the rib 22 provided in the 2nd transparent resin board 14 from the inside of a vehicle. Therefore, the above-described excellent effects can be enjoyed without impairing the beauty.

  As mentioned above, although typical embodiment of this invention has been explained in full detail, it cannot be overemphasized that this invention is not what is limited to embodiment mentioned above.

  For example, in the composite resin glass 10 described above, the rib provided on each transparent resin plate was provided on the surface facing the transparent resin plate, but the surface opposite to the surface, specifically, 8, ribs 18 are provided on the upper surface of the first transparent resin plate 12 (the upper surface in the vertical direction in FIG. 8), or ribs are formed on the lower surface of the second transparent resin plate 14 (the lower surface in the vertical direction in FIG. 8). It is also possible to provide 22 within the allowable range in the application of the composite resin glass.

  Moreover, the shape of the rib provided in each transparent resin plate is not limited to each shape of the rib 18 and the rib 22 in the composite resin glass 10 mentioned above. In the present invention, ribs are provided to improve the rigidity of the transparent resin plate, and any rib having a shape capable of increasing the rigidity of the transparent resin plate is adopted in the present invention. Is possible.

  In addition, although not enumerated one by one, various changes, modifications, improvements, and the like can be added to the present invention based on the knowledge of those skilled in the art, in addition to the above-described specific description, without departing from the spirit of the present invention. It should be understood that it is.

  As described above, the multilayer resin glass according to the present invention has an intermediate layer made of a transparent resin material different from the resin material constituting the transparent resin plate between the two transparent resin plates, Since such a transparent resin plate is used in which ribs protrude from one surface, the presence of the intermediate layer reduces high frequency band noise by the ribs provided on the transparent resin plate. Each of the frequency band noises can be effectively cut off.

  In order to confirm the effect of the multilayer resin glass of the present invention, an acoustic transmission loss test was conducted. First, the multilayer resin glass shown by FIG. 1 thru | or FIG. 8 was prepared as a test body. In the prepared multilayer resin glass, L1 in FIG. 1 is 450 mm, L2 is 280 mm, the thickness of each of the transparent resin plates 12 and 14 made of polycarbonate resin, and ethylene-vinyl acetate copolymer weight The thickness of the intermediate layer 16 made of coalescence (EVA) is 3 mm, the protrusion height of the annular protrusion 18 a on the transparent resin plate 12 is 2 mm, the protrusion height of the protrusion 18 b is 1 mm, and the rib 22 on the transparent resin plate 14 The protruding height is 2 mm.

  On the other hand, as a comparative example, a single-layer resin glass (thickness: 3 mm) made of polycarbonate resin having the same external shape as the above-described multilayer glass was prepared.

  Sound transmission loss according to the method specified in JIS A 1416: 2000 “Measurement method of air sound insulation performance of building members in the laboratory” using the prepared multilayer resin glass and single layer resin glass as test specimens A test was conducted. The resulting graph is shown in FIG.

  As is clear from the graph shown in FIG. 11, in the multilayer resin glass according to the present invention, there is a variation in transmission loss in a low frequency band of about 100 to 700 Hz as compared with a single layer resin glass. In addition, it is recognized that the transmission loss is suppressed in a high frequency band of 10,000 Hz or higher. As a result, the multilayer resin glass of the present invention exhibits excellent sound insulation against low frequency band (about 100 to 700 Hz) sound and high frequency band (about 10000 Hz or higher) sound. It was confirmed.

DESCRIPTION OF SYMBOLS 10 Multilayer resin glass 12 1st transparent resin board 14 2nd transparent resin board 16 Intermediate | middle layer 18 Rib 18a Annular protrusion 18b Projection 20 Main part 22 Rib 24 Main part 30 Window unit 32 Mall 34 Colored frame 36 Engagement Stop clip

Claims (4)

  Between the two transparent resin plates, there is an intermediate layer made of a transparent resin material different from the resin material constituting the transparent resin plates, and each of the two transparent resin plates has a rib protruding on one surface. A multilayer resin glass characterized in that it is provided.   In the state where the two transparent resin plates face each other on the side where the ribs are provided and the ribs formed on one transparent resin plate do not contact the other transparent resin plate, The multilayer resin glass according to claim 1, wherein the multilayer resin glass is disposed with an intermediate layer interposed therebetween.   The multilayer resin glass according to claim 1 or 2, wherein the intermediate layer is formed of an ethylene-vinyl acetate copolymer. The window unit for motor vehicles which has the multilayer resin glass of any one of Claim 1 thru | or 3.

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