GB9656-2021

Safety technical specification for glazing materials used in power-driven vehicles

机动车玻璃安全技术规范

GB 9656-2021 est une norme nationale chinoise obligatoire en vigueur : Safety technical specification for glazing materials used in power-driven vehicles. Secteur : Électronique. Thème principal : Sécurité des produits. Entrée en vigueur : 1 janv. 2023.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to safety glazing materials used in power-driven vehicles, including categories M, N, O, and L class vehicles with cabs, as well as agricultural and forestry specialized vehicles. It covers various material types such as laminated safety glass, tempered safety glass, and rigid plastic glazing. This standard does not apply to glass used in vehicle lighting, signaling devices, or dashboards.

Exigences techniques

The standard categorizes safety requirements into four main areas: vision safety, strength safety, destruction safety, and environmental durability. Vision safety requirements dictate parameters for visible light transmittance, secondary image deviation, and optical distortion to ensure clear driver visibility. Manufacturers must ensure strict adherence to the specified test zones for windscreens. Strength safety requirements evaluate the material's ability to withstand impacts. This includes head-form impact performance, penetration resistance, and general impact resistance. The standard specifies acceptable crack patterns, fragment detachment limits, and penetration thresholds to minimize occupant injury during collisions. Destruction safety requirements focus on the post-breakage behavior of the glazing, such as the fragment state of tempered glass, ensuring no excessively large or sharp pieces are formed. It also includes burning resistance and chemical erosion resistance for specific materials like glass-plastic composites and filmed glazing. Environmental durability safety requirements assess the material's longevity under various conditions. This encompasses abrasion resistance, resistance to heat, radiation, humidity, temperature changes, and simulated weathering. Suppliers must verify that their materials maintain structural integrity and optical clarity after these environmental tests.

Méthodes d’essai

Testing procedures are primarily based on the GB/T 5137 series and GB/T 31849-2015 standards. Key evaluations include optical performance tests for light transmittance and distortion, mechanical tests using a head-form model and steel balls for impact and penetration resistance, and environmental conditioning tests for radiation, humidity, and temperature cycling. The standard also defines specific rules for sample sizes and pass/fail criteria in its normative appendices.

Questions fréquentes

What products are regulated under GB 9656-2021?

GB 9656-2021 applies to glazing materials used in power-driven vehicles, including categories M, N, O, and L class vehicles with cabs, as well as agricultural and forestry vehicles. It does not apply to glass used in lighting, signaling devices, or dashboards.

Are there any major updates from the previous GB 9656-2003 version?

The 2021 version is a comprehensive update that introduces requirements for rigid plastic glazing, filmed glazing, and head-up display (HUD) windscreens. It also removes color recognition requirements and eliminates the category of *zoned tempered safety glass*.

How does GB 9656-2021 handle testing methodologies?

The standard references Chinese test method standards GB/T 5137 (Parts 1, 2, 3, 5) and GB/T 31849-2015 for filmed glazing. Engineers must ensure their testing protocols align with these specific referenced methodologies for Chinese certification.

The summary above provides a high-level overview of GB 9656-2021. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 9656-2021 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: T 26
ICS: 43.040.60
Autorité compétente: Ministry of Industry and Information Technology
Comité technique: Ministry of Industry and Information Technology

Relations

Remplace:GB 9656-2003