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Status of PSG IWG (Mutual Resolution No . [4])

This document provides an overview of the Mutual Resolution No. 4 related to Panoramic Sunroof Glazing (PSG) by the PSG Informal Working Group (IWG). The Mutual Resolution addresses the use of ceramic layers on toughened safety glass panes in PSG and the associated risks. The document details the background, activities, and phases of the PSG IWG since its establishment in 2015, leading up to the adoption of Mutual Resolution No. 4 on 8th October 2019. This resolution serves as an interim solution until new technologies become available to reduce the risk of glass breakage in PSG.

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Status of PSG IWG (Mutual Resolution No . [4])

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  1. Status of PSG IWG (Mutual Resolution No.[4]) 8th October 2019 Korea Transportation Safety Authority (TS) Korea Automobile Testing & Research Institute (KATRI) UN ECE / WP29 / GRSG/ 117th GRSG Informal document GRSG-117-38117th GRSG, 8-11 Oct. 2019 Agenda item 6 SungbokEom, Chairman of PSG IWG

  2. Background of MR No.[4] • Panoramic Sunroof Glazing(PSG) is widely used in global vehicle production • Ceramic layer, CPA(Ceramic Printed Area), is necessary on the toughened safety glass panes of PSG for the technical requirements and design purposes • However, CPA reduces mechanical strength of toughened safety glass panes in general • This indicates a higher risk of complete toughened safety glass pane breakage • Informal Working Group(IWG) had established with adoption by the AC.3 on march 2015

  3. Background of MR No.[4] • The aim was to develop an amendment UN GTR No.6(Safety Glazing) and UN R No.43 • Long-term studies are required for testing requirement amendment UN GTR No.6 and UN R No.43, would be take several years • Industry has been developing new technologies for PSG, such as an enamel material instead of ceramic, it would have a possibility to reduce risk of glass breakage, but not available in the near future • Based on this situation, all members of PSG IWG agreedrecommendation with this Mutual Resolution is good intermediate solution until new technologies are possible to use

  4. Major PSG IWG activities • The activities of PSG IWG since 2015 can be categorized into 3 phases • 1st phase(2015, 2016) • - Collect, analyze and discuss existing data from global markets to • understand number of glass breakages and risk of injuries • 2nd phase(2017, 2018) • - 1st amendment of UN GTR No.6 had submitted and approved on • 112th GRSG session on April of 2017 • - Gather further data and validate how much research is needed to • be able to make amendments UN GTR No.6, UN R No.43 • 3rd phase(2018, 2019) • - Research will take too long so that IWG concluded to have a • Mutual Resolution is a good immediate solution • - IWG focused to define and agree on CPA limitation values • - Among the 10 times of Webex meeting on 2019, IWG prepared • Mutual Resolution No.4

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