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CN-117863673-B - Laminated glazing and process

CN117863673BCN 117863673 BCN117863673 BCN 117863673BCN-117863673-B

Abstract

The present disclosure relates to laminated glazing and processes. A laminated glazing and a process for producing a shaped laminated glazing are disclosed. The laminate includes a first glass layer having a first surface and a second surface, a second glass layer having a third surface and a fourth surface, at least one polymer layer between the first glass layer and the second glass layer, a masking tape around at least a portion of a perimeter of the window glass, the masking tape having at least one sensor window and including a first masking layer and a second masking layer, the first glass layer having a first masking layer adhered to at least a portion of the perimeter of the first surface or the second surface, the first masking layer including at least one first sensor window portion having a first sensor window portion optical distortion, the second glass layer having a second masking layer adhered to at least a portion of the perimeter of the third surface or the fourth surface, the second masking layer including at least one second sensor window portion having a second sensor window portion optical distortion, the first sensor window portion optical distortion and the second sensor window portion optical distortion each being controlled such that an absolute magnitude of the optical distortion of the sensor window is lower than an absolute magnitude of the first sensor window optical distortion and the second sensor window distortion.

Inventors

  • VOSS JONATHAN PETER

Assignees

  • 皮尔金顿集团有限公司

Dates

Publication Date
20260505
Application Date
20200326
Priority Date
20190326

Claims (20)

  1. 1. A laminated glazing comprising: a first glass layer having a first surface and a second surface, A second glass layer having a third surface and a fourth surface, At least one polymer layer positioned between the first glass layer and the second glass layer, A masking tape surrounding at least a portion of a perimeter of the glazing, the masking tape having at least one sensor window and comprising a first masking layer and a second masking layer, The first glass layer has a first masking layer adhered to at least a portion of the perimeter of the first surface or the second surface, the first masking layer including at least one first sensor window portion having a first sensor window portion optical distortion, The second glass layer has a second masking layer adhered to at least a portion of the perimeter of the third surface or the fourth surface, the second masking layer including at least one second sensor window portion having a second sensor window portion optical distortion, Wherein the first sensor window portion optical distortion and the second sensor window portion optical distortion are each controlled such that the absolute magnitude of the optical distortion of the sensor window is lower than the absolute magnitude of the optical distortion of the first sensor window and the second sensor window, Wherein the first sensor window portion has an x-axis dimension and/or a y-axis dimension and the second sensor window portion has an x-axis dimension and/or a y-axis dimension, wherein the x-axis dimension and/or the y-axis dimension of the first sensor window portion is different from the x-axis dimension and/or the y-axis dimension of the second sensor window portion, Wherein the x-axis dimension of the first sensor window portion is greater than the x-axis dimension of the second sensor window portion, and/or the y-axis dimension of the first sensor window portion is greater than the y-axis dimension of the second sensor window portion, Wherein the smaller window portion is positioned such that there is an offset at each end of the dimension relative to the larger window portion, an Wherein the offset at one end of the y-axis dimension is different from the corresponding offset at the other end of the y-axis dimension, Thereby allowing control of the first sensor window portion optical distortion and the second sensor window portion optical distortion.
  2. 2. The laminated glazing of claim 1, wherein the shape of the first sensor window portion is different from the shape of the second sensor window portion, thereby controlling the first sensor window portion optical distortion and the second sensor window portion optical distortion.
  3. 3. A laminated glazing according to claim 1, wherein the shape of the first and/or second sensor window portions is square, rectangular, trapezoidal, elliptical or circular.
  4. 4. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions are partially or fully surrounded by the first and/or second masking layers, respectively.
  5. 5. A laminated glazing according to claim 1, wherein at least a portion of the perimeter of the first or second sensor window portion is patterned.
  6. 6. A laminated glazing according to claim 5, wherein at least a portion of the perimeter of the first or second sensor window portions comprises a patch, line, fade-out, or feathered edge.
  7. 7. A laminated glazing according to claim 5, wherein at least a portion of the perimeter of the first or second sensor window portions comprises a saw tooth fade.
  8. 8. The laminated glazing of claim 1, wherein the first and second masking layers are formed of materials having different emissivity or infrared reflectivity, thereby allowing control of the first and second sensor window portions optical distortion.
  9. 9. A laminated glazing according to claim 1, wherein at least a portion of the first and/or second opacifying layers has an infrared reflectance of 21% or more in the region of the wavelength range 800nm to 2250 nm.
  10. 10. A laminated glazing according to claim 1, wherein the first and/or second masking layer comprises an enamel comprising a frit and an inorganic pigment, and wherein the inorganic pigment is selected from a chromium-iron pigment, a ferrite pigment, a chromite pigment or a ferrite/chromite pigment.
  11. 11. A laminated glazing according to claim 10, wherein the enamel of the first masking layer and/or the enamel of the second masking layer is selected from a low emissivity or low IR reflectivity enamel or a high emissivity or high IR reflectivity enamel, thereby allowing control of the first sensor window portion optical distortion and the second sensor window portion optical distortion.
  12. 12. A laminated glazing according to claim 1, wherein the perimeter of the first or second sensor window portion comprises a shadow frame segment having a lower or higher IR reflectivity than the shadow layer on the remainder of the glazing layer and/or a lower or higher IR reflectivity than the shadow layer on the other glazing layer.
  13. 13. A laminated glazing according to claim 12, wherein the perimeter of the second sensor window portion comprises the shadow frame portion.
  14. 14. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions have an optical distortion in the range-405 to +405 millidiopters.
  15. 15. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions have an optical distortion in the range-310 to +310 millidiopters.
  16. 16. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions have an optical distortion in the range-205 to +205 millidiopters.
  17. 17. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions have an optical distortion in the range-185 to +185 millidiopters.
  18. 18. A laminated glazing according to claim 1, wherein the first and/or second sensor window portions have an optical distortion in the range-155 to +155 millidiopters.
  19. 19. A laminated glazing according to claim 1, wherein the sensor window has an optical distortion in the range of-195 to +195 millidiopters.
  20. 20. A laminated glazing according to claim 1, wherein the sensor window has an optical distortion in the range-145 to +145 millidiopters.

Description

Laminated glazing and process The present divisional application is based on the chinese patent application with the application number 202080031681.1, the application date 2020, 3 and 26, and the name "laminated glazing and Process". Technical Field The invention relates to laminated glazing (glazings), automotive glazing and a process for producing such glazing. Background Laminated glazings comprising two sheets of glazing material (typically glass) laminated together by a plastics interlayer (e.g. polyvinyl butyral, PVB) are useful in construction and in particular for automotive glazings. Windshields and more other automotive glazings are typically laminated glazings and may be provided with a masking band around their periphery. Masking tapes are often black or very dark in color and are generally opaque to visible light (and often other wavelengths, such as UV). Masking tapes are used to conceal components on a glazing, such as a fixture, and also provide UV protection for, for example, an adhesive used to secure the glazing in place. The masking tape may be made using enamel (enamel). Such enamels are resistant to weathering and abrasion once fired. The masking tape may be applied by screen printing enamel ink onto the glass. Enamel inks generally include a frit (flux), a pigment, and a liquid component (e.g., oil) to improve the screen printing properties of the enamel ink. After screen printing, the enamel ink may be cured (e.g., by ultraviolet radiation) or dried (e.g., by heating to up to about 300 ℃) and then fired by heating to an elevated temperature to melt the flux and ensure adhesion to the glass surface. It is common practice to number the surface of the laminated glazing, starting from the surface facing the exterior of the vehicle or building in which the glazing is installed. Thus, the surface 1 is an outwardly facing surface and is an exposed surface. In a laminate comprising two layers of glazing material, the surface 1 is the outer surface of the outwardly facing layer. The surface 2 is the inwardly facing surface of the outer layer, i.e. the surface of the outer layer facing the interior of the vehicle or building. The surface 2 is not an exposed surface as it is in contact with and covered by the plastic interlayer. The surface 3 is the outwardly facing surface of the inner layer, i.e. the surface of the inner layer facing the exterior of the vehicle or building. Like surface 2, surface 3 is not an exposed surface because it is in contact with and covered by the plastic interlayer. Thus, surfaces 2 and 3 are unexposed or covered surfaces. The surface 4 is the inner surface of the inwardly facing layer, i.e. the exposed surface facing the interior of the vehicle or building. In laminated glass (e.g., windshields), the masking tape may be printed on surface 4 or the inner surface of the laminate (e.g., surface 2, glass/polymer interface inside the laminate). A glazing with a masking tape on one glass layer is typically formed by heating each glass substrate to an elevated temperature after the enamel is applied to the glass substrate. Printing masking tape on the inner surface of the laminate (e.g., surface 2 or surface 3) can reduce perspective distortion that can sometimes occur. WO-up>A-2017/159752 discloses laminated glass printed on surfaces 2 and 4 in some embodiments with reduced perspective distortion in the vicinity of the masking tape. Enamel will often be burned by a heating step. After shaping, optical distortion associated with the boundary between the printed/non-printed areas of the glass may occur. Such optical distortion is sometimes referred to as "burn-in" (burnline), and it tends to extend parallel to the boundary. Attempts have been made to reduce or eliminate burn-out by modifying bending process parameters such as temperature profile and/or by designing, building and installing shields on glass bending tools/molds. EP-A-0 415 020 discloses a method for preferentially heating glass sheets having decorative ceramic enamel boundaries without adversely affecting the optical quality of the glass. Preferential heating is achieved by using heaters that radiate thermal energy at selected wavelengths that are more readily absorbed by the enamel than glass, thereby heating the enamel faster than glass. In a particular embodiment, the glass with ceramic enamel boundaries is preheated to a temperature above its strain point temperature. The coated glass is then exposed to a quartz heater to preferentially heat the enamel to a temperature high enough to fire it onto the glass. The ceramic enamel is then allowed to cool to the temperature of the rest of the glass. US-B-5,443,669 discloses a process for producing laminated glass panels with single or double curvature, in particular for motor vehicles, more particularly for producing glass panels with printed patterns, in particular for motor vehicle windshields where the pattern may be a border. The printed pattern is formed