• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a viscoelastic plastic interlayer intended to be incorporated between two glass sheets to form a laminated glazing unit having vibroacoustic damping properties, the interlayer comprising at least one layer (3) of viscoelastic plastic material having the properties of vibro-acoustic damping and the interlayer being tinted in the mass at least on a part of its surface, the insert being such that the resonance frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm composed of two sheets of glass 2.1 mm thick each between which is incorporated the interlayer, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor η2 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. The invention makes it possible to reduce the thickness of the glass sheets without degrading the vibroacoustic damping properties, while ensuring respect for the privacy of persons inside a vehicle or for protecting the driver. of a vehicle against glare in the light of the sun.
    公开号:FR3013631A1
    申请号:FR1361724
    申请日:2013-11-27
    公开日:2015-05-29
    发明作者:Corinne Payen；David Fournier
    申请人:Saint Gobain Glass France SAS；Compagnie de Saint Gobain SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a viscoelastic plastic interlayer intended to be incorporated between two sheets of glass to form a laminated glazing unit having damping properties. DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION vibroacoustics, intended in particular for locomotion machines, in particular a motor vehicle. Among all the qualities that contribute to comfort in modern means of transport such as trains and cars, silence has become decisive. Acoustic comfort has been improved for several years now, treating noise, such as engine noises, running noise or suspension, and this at their origin or during their propagation air or in solids, for example by means of absorbent coatings, elastomer connecting piece. Vehicle shapes have also been modified to improve air penetration and reduce turbulence which is itself a source of noise.
    [0002] And in recent years, we have been studying the role that glazing could play in improving acoustic comfort, particularly laminated glazing with plastic interlayer films. Laminated glazing also has other advantages such as eliminating the risk of splashing fragments in case of sudden breakage, constitute a burglar-proofing device. It has been demonstrated that the use of standard plastic films in laminated glazings is not suitable for improving acoustic comfort. Specific plastic films were then developed which had damping properties to improve acoustical comfort. Furthermore, in existing windshields, the thickness of the glass sheet intended to be turned towards the outside of the vehicle is generally -2 -2.1 mm and the thickness of the glass sheet intended for being turned towards the inside of the vehicle is usually 1.6 mm. However, the trend is to lighten up motor vehicles in order to reduce their consumption and the release of induced CO2. One way is to offer lighter automotive windows. One solution for reducing the weight of the glazings is to reduce the thickness of the glass sheets. However, this reduction in thickness causes degradation of the acoustic properties of the laminated glazing. In addition, it is also important to respect the privacy of people inside a vehicle or to protect the driver of a vehicle against glare in the sunlight or simply for aesthetic effect. There is therefore a need for a viscoelastic plastic interlayer to be incorporated between two sheets of glass to form a laminated glazing having vibroacoustic damping properties, which allows for a reduction in the thickness of the glass sheets. glass without damaging vibro-acoustic damping properties, while ensuring respect for the privacy of people inside a vehicle or protecting the driver of a vehicle against glare in the light of the sun or simply for an aesthetic effect.
    [0003] For this purpose, the invention proposes a viscoelastic plastic interlayer intended to be incorporated between two sheets of glass to form a laminated glazing unit having vibro-acoustic damping properties, the interlayer comprising at least one layer of viscoelastic plastic material having vibro-acoustic damping and the interlayer being tinted in the mass at least on a part of its surface, the spacer being such that the resonance frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm composed of two 2.1 mm thick glass sheets between which the spacer is incorporated, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is included between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. In another feature, the layer is based on polyvinyl butyral and plasticizer. According to another feature, the resonance frequency f2 is between 800 and 900 Hz, preferably between 800 Hz and 850 Hz.
    [0004] In another feature, the loss factor 112 is greater than 0.30. According to another feature, the interlayer further comprises two outer layers of standard PVB, the layer being between the two outer layers. According to another particularity, the measurement of the mechanical impedance is made at least 1 month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled at least 1 month after the manufacture of the interlayer. The invention also relates to a glazing unit comprising: a glass sheet having a thickness of between 0.5 mm and 2.6 mm; a glass sheet having a thickness of between 0.5 mm and 1.6 mm; an insert described above, the interlayer being between the glass sheets, wherein the total thickness of the glass sheets is strictly less than 3.7 mm.
    [0005] According to another feature, the insert is tinted in its upper part. According to another feature, the interlayer is tinted on its entire surface. The invention also relates to a motor vehicle comprising a glazing unit described above, the glass sheet having a thickness of between 0.5 mm and 2.6 mm being turned towards the outside of the vehicle and the thick glass sheet between 0.5 mm and 1.6 mm being turned towards the inside of the vehicle. The invention also relates to a use of the glazing described above as a motor vehicle windshield.
    [0006] According to another feature, the glazing is used as front side window, rear side window, rear window or rear window of a motor vehicle. Other features and advantages of the invention will now be described with reference to the drawings, in which: FIG. 1 represents a curve of the acoustic insulation as a function of frequency, measured on three windscreens; - Figure 2 shows a sectional view of a glazing according to the invention. The invention relates to a viscoelastic plastic interlayer intended to be incorporated between two glass sheets to form a laminated glazing unit having vibroacoustic damping properties. The spacer comprises at least one layer of viscoelastic plastic material with vibroacoustic damping properties. The spacer is such that the resonant frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm consists of two glass sheets 2.1 mm thick each between which is incorporated. the interlayer, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940 (with a single difference in the thickness of the glass sheets of the bar which is 2.1 mm instead of 4 mm), is between 760 Hz and 1000 Hz and the loss factor 1I2 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. In addition, the interlayer is tinted in the mass at least on a portion of its surface, which allows, in case of hue on the entire surface, to respect the privacy of people inside a vehicle or simply for an aesthetic effect, or, in case of tint on the upper part of a windshield, to protect the driver of a vehicle against glare in the light of the sun. The inventors have demonstrated, as will be seen below, that an interlayer comprising these features makes it possible to obtain a thin laminated glazing with acoustic performances equivalent to or even greater than those of a laminated glazing unit with conventional glass thicknesses. incorporating an interlayer with known improved acoustic properties. The interlayer according to the invention is intended to be incorporated between two sheets of glass to form a laminated glazing unit.
    [0007] Figure 2 shows a sectional view of a glazing unit according to the invention. The glazing comprises two sheets of glass 1, 2 between which is inserted the interlayer according to the invention. The interlocking of the interlayer with the glass sheets is carried out by known means, for example by stacking the glass sheets and the interlayer and by passing the assembly in an autoclave. The glass sheet 1 of the glazing is intended to be turned towards the outside of the vehicle while the glass sheet 2 is intended to be turned towards the inside of the vehicle. The glass sheet 1 is preferably thicker than the glass sheet 2 so that the glazing allows better protection against external attacks (inclement weather, projection of chippings, etc ...). Indeed, the thicker the glass, the more mechanically resistant it is. However, the thicker the glass, the heavier it is. We must therefore find a compromise between the mechanical strength and the weight of the glazing. Thus, the thickness of the glass sheet 1 is for example between 0.5 mm and 2.6 mm, preferably between 1.4 and 2.0 mm and the thickness of the glass sheet 2 is for example between 0.5 mm and 1.6 mm, preferably between 1.1 and 1.5 mm. In existing glazings, the thickness of the glass sheet 1 is generally 2.1 mm and the thickness of the glass sheet 2 is generally 1.6 mm, ie a total glass thickness of 3, 7 mm. The glazing according to the present invention comprises a total glass thickness strictly less than 3.7 mm, preferably less than or equal to 3.2 MM. Preferably, according to the invention, the thickness of the glass sheet 1 is 1.8 mm and the thickness of the glass sheet 2 is 1.4 mm in order to limit the weight of the glazing, which allows to reduce the fuel consumption of a vehicle equipped with such a glazing unit. It also makes it easier to handle the glazing and save material. The glazing according to the invention may also have a glass sheet 1 having a thickness of 1.6 mm and a glass sheet 2 having a thickness of 1.2 mm, or a glass sheet 1 having a thickness of 1.4 mm and a thickness of glass sheet 2 1.1 mm thick. The interlayer consists of at least one viscoelastic plastic layer 3 with vibroacoustic damping properties. It is preferably based on polyvinylbutyral and plasticizer. The rate and the nature of the plasticizer and the degree of acetalization of the polyvinyl butyral make it possible to play in a known manner on the rigidity of a component based on polyvinyl butyral and plasticizer.
    [0008] In the example of Figure 2, the spacer also comprises two layers 4, 5, said outer layers, between which is inserted the layer 3. The outer layers 4, 5 are preferably standard PVB. The layer 3 is less rigid than the outer layers 4, 5 in order to vibrate properly to ensure the desired acoustic damping.
    [0009] Alternatively, the interlayer may comprise at least two viscoelastic plastic layers with vibro-acoustic damping properties, surrounded or not by standard PVB layers. The acoustic characteristics of the interlayer are determined by measuring the mechanical impedance (MIM) at 20 ° C according to ISO 16940 of a laminated glass pane with a surface area of 25 mm x 300 mm composed of two sheets of glass. thickness 2.1 mm (and not 4 mm as recommended in ISO 16940) each between which is incorporated a spacer according to the invention, that is to say a spacer comprising at least one viscoelastic plastic layer with properties vibro-acoustic damping.
    [0010] The MIM makes it possible to determine resonance frequencies and loss factors of the various resonance modes of the laminated glazing bar. The spacer is according to the invention if the resonance frequency f2 of the second resonance mode of the laminated glazing bar determined by MIM is between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the glazing bar. Laminated determined by MIM is greater than or equal to 0.25. Preferably, the resonant frequency f2 is between 800 Hz and 900 Hz, which makes it possible to have improved acoustic performances by degrading less the level of weakening of the laminated glazing before the critical frequency. More preferably, the resonant frequency f2 is between 800 Hz and 850 Hz, which makes it possible to have acoustic performances further improved by further degrading the attenuation level of the laminated glazing before the critical frequency. Preferably, the loss factor ri2 is greater than 0.30, which makes it possible to have improved acoustic performances by improving the acoustic damping. The measurement of the mechanical impedance (MIM) is carried out at least 1 month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled at least 1 month after the manufacture of the interlayer. This makes it possible to be sure that the interlayer and the laminated glazing have reached stable states and thus to determine reliable values. Figure 1 shows a curve of sound insulation as a function of frequency, measured on three windshields. The acoustic insulation of a glazing unit accounts for the acoustic performance that can be observed on a vehicle equipped with said glazing.
    [0011] Thus, a first windshield (21-16 known) comprises: - two glass sheets of respective thicknesses 2.1 mm and 1.6 mm, and - an interlayer comprising two outer layers in standard PVB and a central layer in viscoelastic plastic with vibro-acoustic damping properties, the interlayer having a resonance frequency f2 of 675 Hz (± 15 Hz) and a loss factor 112 equal to 0.35 (± 0.03). The first windshield corresponds to a conventional windshield with an interlayer with known acoustic damping properties. The sound insulation curve (represented by diamonds) of the first windshield shows a hollow around 6500 Hz. A second windshield (18-14 known) comprises: two glass sheets of respective thicknesses 1.8 mm and 1.4 mm, and an interlayer comprising two outer layers of standard PVB and a viscoelastic plastic core layer with vibro-acoustic damping properties, the interlayer having a resonance frequency f2 of 675 Hz (± 15 mm). Hz) and a loss factor 112 equal to 0.35 (± 0.03).
    [0012] 3 0 13 6 3 1 8 The second windshield is a thinned windshield with a spacer identical to that of the first windshield. The acoustic insulation curve (represented by squares) of the second windshield shows a behavior similar to that of the first windshield up to 5000 Hz, but a hollow shifted towards the high frequencies, around 8000 Hz. Offset of the trough is very troublesome because it implies that this windshield lets airborne sounds at high frequencies that are annoying to the human ear. A third windshield (18-14 invention) comprises: two glass sheets of respective thicknesses 1.8 mm and 1.4 mm, and an interlayer comprising two outer layers of standard PVB and a viscoelastic plastic core layer the vibroacoustic damping properties, the interlayer having a resonance frequency f2 of 800 Hz (± 15 Hz) and a loss factor 112 equal to 0.30 (± 0.03). The third windshield is a thinned windshield with a spacer according to the invention. The acoustic insulation curve (represented by triangles) of the third windshield shows a behavior similar to that of the first windshield, with a recentered hollow around 6500 Hz and acoustic insulation values similar to those of the first windshield. The windshield with an interlayer according to the invention therefore makes it possible to compensate for the acoustic degradation associated with the thinning of the glazing. The laminated glazing according to the invention can be used as a windshield for a motor vehicle. In this case, of course, it satisfies all the requirements of United Nations Regulation No. 43 (known as R43) to withstand hard shocks to ensure its mechanical strength. To do this, in the case of a spacer comprising two outer layers of standard PVB, the thickness of these outer layers 4, 5 is for example adapted in a known manner, for example by the patent application FR 09 52567. Moreover , the interlayer is tinted in the mass at least on a part of its surface. When tinted only at the top of a windshield, it protects the driver of a vehicle from glare in the sunlight. When tinted over its entire surface, it can allow respect for the privacy of people inside a vehicle. When the hue is weak, it simply has an aesthetic effect. In case of light transmission that is too low compared to the existing standards for the windscreen or the front side windows, it can be used in a rear side window, in a rear window or in a quarter window of a motor vehicle.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Viscoelastic plastic interlayer intended to be incorporated between two sheets of glass to form a laminated glazing unit having vibroacoustic damping properties, the interlayer comprising at least one layer (3) of viscoelastic plastic material with vibroacoustic damping properties and the insert being tinted in the mass at least on a part of its surface, the insert being such that the resonant frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm is laid of two sheets of glass 2.1 mm thick each between which is incorporated the interlayer, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25.
    [0002]
    2. The spacer according to claim 1, wherein the layer (3) is based on polyvinyl butyral and plasticizer.
    [0003]
    3. The spacer according to claim 1 or 2, wherein the resonant frequency f2 is between 800 and 900 Hz, preferably between 800 Hz and 850 Hz.
    [0004]
    The spacer according to one of claims 1 to 3, wherein the loss factor I12 is greater than 0.30.
    [0005]
    The spacer according to one of claims 1 to 4, further comprising two outer layers (4, 5) of standard PVB, the layer (3) being between the two outer layers (4, 5).
    [0006]
    6. Spacer according to one of claims 1 to 5, wherein the measurement of the mechanical impedance is performed at least 1 month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled to less than 1 month after the manufacture of the interlayer.
    [0007]
    7. Glazing comprising: - a glass sheet (1) with a thickness of between 0.5 mm and 2.6 mm, - a glass sheet (2) with a thickness of between 0.5 mm and 1.6 mm an interlayer according to any one of claims 1 to 6, the interlayer being between the glass sheets (1, 2), wherein the total thickness of the glass sheets (1, 2) is strictly less than 3; , 7 mm.
    [0008]
    8. Glazing according to claim 7, wherein the insert is tinted in its upper part only.
    [0009]
    9. Glazing according to claim 7, wherein the insert is tinted over its entire surface.
    [0010]
    10. Motor vehicle comprising a glazing unit according to one of claims 7 to 9, the glass sheet (1) with a thickness of between 0.5 mm and 2.6 mm being turned towards the outside of the vehicle and the a glass sheet (2) with a thickness of between 0.5 mm and 1.6 mm facing towards the inside of the vehicle.
    [0011]
    11. Use of the glazing according to claim 7 or 8 as a windshield of a motor vehicle.
    [0012]
    12. Use of the glazing according to claim 7 or 9 as a windshield, front side window, rear side window, rear window or rear quarter window of a motor vehicle.
    类似技术:
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    同族专利:
    公开号 | 公开日
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    KR102308413B1|2021-10-05|
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    CA2930238A1|2015-06-04|
    US20170210097A1|2017-07-27|
    CN110001162A|2019-07-12|
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    CN104822526A|2015-08-05|
    EA031258B1|2018-12-28|
    JP2017504549A|2017-02-09|
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    FR3074117B1|2017-11-30|2020-12-04|Saint Gobain|WINDOWS OF VEHICLE WITH EXTERNAL LIGHT SIGNALING, INCORPORATED VEHICLE AND MANUFACTURING.|
    FR3074118B1|2017-11-30|2020-12-11|Saint Gobain|VEHICLE LUMINOUS GLASS ROOF, INCORPORATED VEHICLE AND MANUFACTURING.|
    FR3074090B1|2017-11-30|2019-11-15|Saint-Gobain Glass France|GLAZING OF VEHICLE WITH EXTERNAL LIGHT SIGNALING, VEHICLE INCORPORATING IT AND MANUFACTURING.|
    FR3077229A1|2018-01-31|2019-08-02|Saint-Gobain Glass France|SHEET GLAZING WITH ELECTRO-CONTROLLABLE DEVICE AND MANUFACTURE|
    FR3077219B1|2018-01-31|2020-06-26|Saint-Gobain Glass France|SHEET GLAZING WITH ELECTRICALLY CONTROLLED DEVICE AND MANUFACTURE|
    FR3084355A1|2018-07-27|2020-01-31|Saint-Gobain Glass France|ENAMELLED SUBSTRATE, AUTOMOTIVE LIGHT GLASS DEVICE WITH SUCH SUBSTRATE AND ITS MANUFACTURE.|
    FR3084354B1|2018-07-27|2020-07-17|Saint-Gobain Glass France|ENAMELLED SUBSTRATE FORMING PROJECTION SCREEN, AND ITS MANUFACTURE.|
    FR3084353A1|2018-07-27|2020-01-31|Saint-Gobain Glass France|ENAMELLED SUBSTRATE, LUMINOUS GLASS DEVICE WITH SUCH A SUBSTRATE AND ITS MANUFACTURE.|
    FR3113008A1|2020-07-31|2022-02-04|Saint-Gobain Glass France|MOTOR VEHICLE LUMINOUS GLAZING and MOTOR VEHICLE WITH SUCH LUMINOUS GLAZING|
    法律状态:
    2015-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2016-11-24| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-28| PLFP| Fee payment|Year of fee payment: 7 |
    2020-11-30| PLFP| Fee payment|Year of fee payment: 8 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1361724A|FR3013631B1|2013-11-27|2013-11-27|VISCOELASTIC PLASTIC INTERIOR FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERCALAR|FR1361724A| FR3013631B1|2013-11-27|2013-11-27|VISCOELASTIC PLASTIC INTERIOR FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERCALAR|
    US15/039,478| US9994001B2|2013-11-27|2014-11-25|Viscoelastic plastic interlayer for vibro-acoustic damping and glazing comprising such an interlayer|
    KR1020167013665A| KR102308413B1|2013-11-27|2014-11-25|Viscoelastic insert for a vibroacoustic damping and glass panel including such an insert|
    CN201910317465.2A| CN110001162A|2013-11-27|2014-11-25|Viscoelasticity plastic interlayer and glassware comprising this interlayer|
    PCT/FR2014/053027| WO2015079159A1|2013-11-27|2014-11-25|Viscoelastic insert for a vibroacoustic damping and glass panel including such an insert|
    CA2930238A| CA2930238C|2013-11-27|2014-11-25|Viscoelastic insert for a vibroacoustic damping and glass panel including such an insert|
    EA201691096A| EA031258B1|2013-11-27|2014-11-25|Viscoelastic plastic interlayer for vibro-acoustic damping and glazing comprising such an interlayer|
    CN201480002528.0A| CN104822526A|2013-11-27|2014-11-25|Viscoelastic insert for vibroacoustic damping and glass panel including such insert|
    JP2016534715A| JP2017504549A|2013-11-27|2014-11-25|Viscoelastic insert for vibroacoustic damping and glass panel including the insert|
    MX2016006557A| MX2016006557A|2013-11-27|2014-11-25|Viscoelastic insert for a vibroacoustic damping and glass panel including such an insert.|
    EP14821742.5A| EP3074223A1|2013-11-27|2014-11-25|Viscoelastic insert for a vibroacoustic damping and glass panel including such an insert|
    JP2020005523U| JP3234647U|2013-11-27|2020-12-22|Viscoelastic inserts for vibration and acoustic damping and glass panels containing the inserts|
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