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JP-7855064-B2 - Laminated glass for automobiles

JP7855064B2JP 7855064 B2JP7855064 B2JP 7855064B2JP-7855064-B2

Inventors

  • 林 軍
  • 王 哲
  • 王 立
  • 陳 碧珠

Assignees

  • フーイャォ グラス インダストリー グループ カンパニー リミテッド

Dates

Publication Date
20260507
Application Date
20220901
Priority Date
20210930

Claims (10)

  1. Laminated glass for automobiles, The manufacturing material includes a first glass plate, a second glass plate, and an intermediate layer material. The first glass plate and the second glass plate have different compositional components. The temperature difference between Tp1 and Tp2 is 50°C or less. Temperature Tp1 is defined as the sum of the transition temperature Tg1 of the first glass plate and the first temperature compensation value Tb1, temperature Tp2 is defined as the sum of the transition temperature Tg2 of the second glass plate and the second temperature compensation value Tb2, and the general formula for temperature Tp is defined as Tp = Tg + Tb. The transition temperature Tg is defined as the temperature at which the viscosity of the glass is 10¹³ poise. The weight ratio of the first temperature compensation value Tb1 to the composition of the first glass plate satisfies the condition that Tb1 is equal to 100 × (3.5 × SiO₂ + 6.5 × Al₂O₃ - 5 × ( Na₂O + K₂O ) - 3 × (CaO + MgO) - 6 × B₂O₃ - 2.5 × (ZnO + P₂O₅ ) ), The weight ratio of the second temperature compensation value Tb2 to the composition of the second glass plate satisfies the condition that Tb2 is equal to 100 × (3.5 × SiO₂ + 6.5 × Al₂O₃ - 5 × ( Na₂O + K₂O ) - 3 × (CaO + MgO) - 6 × B₂O₃ - 2.5 × (ZnO + P₂O₅ ) ), In the first glass plate and the second glass plate, the content of one or more of the following is zero: Al₂O₃ , K₂O , CaO , MgO, B₂O₃ , ZnO , and P₂O₅ . The material of the first glass plate is soda lime silicate, and the material of the second glass plate is aluminosilicate. The weight ratio of Al₂O₃ in the second glass plate is 8 wt% to 12 wt%, and the total weight ratio of alkali metal compounds in the second glass plate is 20 wt% to 25 wt%. Laminated glass for automobiles, characterized in that the total weight ratio of alkaline earth metal compounds in the second glass plate does not exceed 5 wt%.
  2. The laminated glass for automobiles according to claim 1, characterized in that the thickness of the second glass plate is less than the thickness of the first glass plate, and the compositional components of the first glass plate are predetermined components.
  3. The laminated glass for automobiles according to claim 1, characterized in that the composition of the second glass plate contains Na₂O , and the content of Na₂O is 60 wt% or more of the total content of alkali metal compounds in the second glass plate.
  4. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the composition of the second glass plate contains ZnO in a weight ratio of 2 wt% to 6 wt% and P2O5 in a weight ratio of 0 to 3 wt%.
  5. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the thickness of the first glass plate is 2.1 mm or more.
  6. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the first glass plate is colorless glass, colored glass, or painted glass whose painted surface is adjacent to the intermediate layer material.
  7. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the thickness of the second glass plate is 1.1 mm or less.
  8. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the second glass plate has undergone ion exchange.
  9. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the second glass plate is colorless glass with a visible light transmittance of 88% or more.
  10. The laminated glass for automobiles according to any one of claims 1 to 3, characterized in that the intermediate layer material is an organic polymer.

Description

(Cross-reference of related applications) This application claims priority to a Chinese patent application filed on September 30, 2021, with application number 2021111635094 and title of invention "Laminated Glass for Automobiles," which is incorporated in its entirety by reference. This invention relates to the technical field of laminated glass, and more particularly to laminated glass for automobiles. Automotive laminated glass is asymmetrical, with the outer glass being thicker and the inner glass thinner. This special type of laminated glass differs from traditional laminated glass in that the inner glass requires additional chemical strengthening after bending, and then it is bonded to the outer glass to form the laminate. Currently, the chemical strengthening method used for glass in the electronic display cover industry is generally employed for the inner glass. However, certain materials of the inner glass may present the following problems during bending and bonding with the outer glass, and during the chemical strengthening of the inner glass after bending: (1) The softening point of the inner glass may not match that of the outer glass, making it difficult to bend both simultaneously. (2) Even if formed, it is difficult to perfectly match the shapes of the inner and outer glass after forming, resulting in gaps of different sizes between the inner and outer glass after bonding, affecting the optical quality of the product. (3) The forming tendencies of the inner and outer glass may not match, leading to uneven bending in the middle region after heat bending, causing blistering or wrinkles at the edges, and resulting in cracking or optical defects after bonding. The technical solutions in the embodiments of this application will be described clearly and completely below. It will be clear that the embodiments described are only a few embodiments of this application, not all embodiments. All other embodiments derived from the embodiments of this application, without the creative work of a person skilled in the art, are all within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein are solely for illustrative purposes of specific embodiments and are not intended to limit this application. Unless otherwise specified or inconsistent, terms or phrases used herein have the following meanings: In this application, the selectable range of terms used, "and/or," "or/and," and "and/or," includes any one of two or more related enumeration items, including any and all combinations of related enumeration items, where any and all combinations include any two related enumeration items, any more related enumeration items, or all related enumeration items. In this application, "one or more types" refers to one, two, or more of the enumerated items. Here, "more than one type" refers to two or more types. In this application, the terms "that combination," "that any combination," and "that any combination method" used include all appropriate combination methods of any two or more of the enumerated items. In this application, the term "appropriate" as used in phrases such as "appropriate combination method," "appropriate method," and "any appropriate method" is defined as being able to implement the technical solution of this application, solve the technical problem of this application, and achieve the technical effects anticipated by this application. Furthermore, in this application, the phrase "preferably" is used solely to describe a better embodiment or example of the effect and does not constitute a limitation on the scope of protection of this application. In this application, the technical features described in the open-type section include both closed-type technical solutions composed of the listed features and open-type technical solutions that include the listed features. In this application, when referring to a numerical interval, unless otherwise specified, it includes both endpoints of the numerical interval. In this application, when referring to percentage content, unless otherwise specified, it refers to mass percentage for solid-liquid mixtures and solid-phase-solid-phase mixtures, and volume percentage for liquid-phase-liquid-phase mixtures. In this application, unless otherwise specified, percentage concentration refers to the final concentration. Final concentration refers to the proportion of the added component in the system after its addition. In this application, when referring to temperature parameters, unless otherwise specified, it may refer to constant temperature processing or processing within a constant temperature range. In the above constant temperature processing, the temperature can fluctuate within the accuracy range of instrument control. In this application, unless otherwise specified, weight ratio refers to the weig