ASTM C1422 C1422M-2015 Standard Specification for Chemically Strengthened Flat Glass《化学增强平板玻璃的标准规格》.pdf
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1、Designation: C1422/C1422M 10C1422/C1422M 15Standard Specification forChemically Strengthened Flat Glass1This standard is issued under the fixed designation C1422/C1422M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for chemically strengthened glass products that originate from flat glass an
3、d areused in general building construction, transportation, and other specialty applications, such as PC screens, notebooks, tablets,smart phones, and E-readers, as well as copy machine scanners, computer disks, and flat glass screens for television monitors.Techniques such as ion implantation, deal
4、kalization, etch-strengthening, and glaze coatings are specifically excluded.1.2 Classification of chemically strengthened glass products is based on the laboratory measurements of surface (depth ofcompression) compression and case depth and not on the modulus of rupture (MOR). This specification do
5、es not purport to addressend-use performance.1.3 A test method for the measurement of case depth and surface compression is included in Section 8.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact e
6、quivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the
7、user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C162 Terminology of Glass and Glass ProductsC978 Test Method for Photoelastic Determination of Residual Stress i
8、n a Transparent Glass Matrix Using a PolarizingMicroscope and Optical Retardation Compensation ProceduresC1036 Specification for Flat GlassC1279 Test Method for Non-Destructive Photoelastic Measurement of Edge and Surface Stresses in Annealed, Heat-Strengthened, and Fully Tempered Flat GlassF218 Tes
9、t Method for Measuring Optical Retardation and Analyzing Stress in Glass2.2 ANSI Standard:3Z97.12009 Safety Glazing Materials Used in Buildings-Safety Performance, Specifications and Methods of Tests2.3 Federal Document:4CPSC 16CFR 1201 Consumer Product Safety Commission Safety Standard for Architec
10、tural Glazing Materials3. Terminology3.1 Definitions:3.1.1 Refer to Terminology C162, as appropriate.3.1.2 blemishesRefer to Specification C1036 for flat glass.3.2 Definitions of Terms Specific to This Standard:3.2.1 case depthdepth of compression below the surface to the nearest zero stress plane.1
11、 This specification is under the jurisdiction ofASTM Committee C14 on Glass and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat Glass.Current edition approved Oct. 1, 2010Nov. 1, 2015. Published December 2010December 2015. Originally approved in 1999. Last previous edi
12、tion approved in 20052010as C142299(2005)C1422/C1422M 10. 1. DOI: 10.1520/C1422_C1422M-10.10.1520/C1422_C1422M-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the
13、 standards Document Summary page on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.4 Available from U.S. Consumer Product Safety Commission (CPSC), 4330 East West Hwy., Bethesda, MD 20814, http:/www.cp
14、sc.gov.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult pr
15、ior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.2 chemically strengthened glassglass
16、which has been strengthened by ion exchange to produce a compressive stress layerat the treated surface.3.2.3 depth of compression (DOC)-see case depth.3.2.4 ion exchange processthe exchange of constituent ions in the glass with externally supplied ions (generally attemperatures near the strain poin
17、t of the glass). This may be accomplished by immersing glass in a molten salt bath or solutionwith or without electric field field, ultrasonic or other assistance, exposing glass to plasma, applying a paste on the glass surface,or contacting glass with molten salts in a furnace.3.2.5 surface compres
18、sionan in-plane stress which tends to compact the atoms in the surface.4. Significance and Use4.1 Chemically strengthened glass is significantly stronger than annealed glass, depending upon the glass composition,strengthening process, level of abrasion, and the application environment. The strengthe
19、ning process does not contributesignificantly to optical distortion.4.2 The chemical strengthening process can effectively strengthen glass of all sizes and shapes and can be useful in cases inwhich glass is too thin, small, or complex-shaped for thermal tempering.4.3 Monolithic chemically strengthe
20、ned glass is not a safety glazing product because its break pattern is similar to that ofannealed glass.When safety glazing is required, chemically strengthened glass shall be laminated in accordance with CPSC 16CFR1201 Cat. I or Cat. II or ANSI Z97.12009.4.4 The very nature of the chemical strength
21、ening process alters the glass surface chemistry. Therefore, the procedures for andthe performance of postprocessing steps, such as laminating and coating, can be different from that of nonchemically strengthenedglass.4.5 Modulus of rupture (MOR), weight gain, and optical methods are other methods u
22、sed for process control in chemicalstrengthening.5. Classification5.1 KindsChemically strengthened glass furnished in accordance with this specification shall be classified on the basis of thesurface compression levels (Level 1-7) and case depth (Levels A-F). These levels Surface compression and cas
23、e depth areindependent of each other. Increasing levels of surface compression permit an increasing amount of flexure. Greater case depthsoffer more protection from strength reduction caused by abuse and abrasion. The thickness of the test specimen shall be reportedwith the surface compression and c
24、ase depth levels. Case depth values may vary on different thicknesses of the same glass typewhich have been manufactured under similar chemical exchange conditions. For classification purposes, all surface compressionand case depth values are to be reported on 3 mm reported, along with the sheet18 i
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