GB13735-2017

Polyethylene blown mulch film for agricultural uses

聚乙烯吹塑农用地面覆盖薄膜

GB 13735-2017 é uma norma nacional chinesa obrigatória vigente: Polyethylene blown mulch film for agricultural uses. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de mai. de 2018.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to polyethylene blown mulch films used for agricultural ground covering, produced primarily from polyethylene resin with necessary additives. It categorizes these films into Class I (weather-resistant) and Class II (general purpose) based on their intended coverage duration. This standard is strictly not applicable to biodegradable mulch films. Manufacturers and importers of agricultural films must verify if their products fall under this specific scope to ensure market compliance.

Requisitos técnicos

The standard specifies critical dimensional and physical parameters for agricultural mulch films. It mandates a minimum nominal thickness of 0.010 mm and sets strict tolerance limits for thickness, width, and net mass per roll. Compliance with these dimensional tolerances is mandatory for all manufactured batches. Additionally, the film rolls must meet specific appearance criteria, being free from defects like bubbles, impurities, and perforations, while maintaining neat winding with limited segment counts. Regarding mechanical performance, the standard outlines requirements for tensile load, nominal strain at break, and right-angle tear load in both longitudinal and transverse directions. These mechanical thresholds are tiered according to the film's nominal thickness. Meeting these mechanical strength metrics is essential to prevent film tearing during field installation and use. For Class I (weather-resistant) films, the standard imposes specific weathering performance requirements. It mandates a minimum retention rate of 50% for the longitudinal nominal strain at break after artificial weathering exposure. Suppliers must ensure their Class I films pass this aging retention test to guarantee the promised coverage duration.

Métodos de ensaio

Dimensional tests for thickness and width are conducted using mechanical measurement methods referenced from GB/T 6672 and GB/T 6673. Mechanical property tests, including tensile load and strain at break, are performed according to GB/T 1040 using Type 2 specimens. Right-angle tear load is evaluated following QB/T 1130. For weathering performance, the standard utilizes laboratory light exposure methods (xenon arc lamps) as specified in GB/T 16422, requiring a 600-hour exposure test for Class I films to determine the strain retention rate.

Perguntas frequentes

What products are regulated under GB 13735-2017?

This standard regulates polyethylene blown mulch films used for agricultural ground covering. It specifically excludes biodegradable mulch films, which are governed by separate standards.

Are there any significant updates from the previous version of GB 13735?

The 2017 version replaces GB 13735-1992. Key updates include the addition of nominal thickness and coverage time requirements, the removal of product grades, and modifications to mechanical and weathering performance indicators. Manufacturers previously certified under the 1992 version must update their compliance to the new mandatory thickness and mechanical limits.

How does GB 13735-2017 differ from international ISO standards?

The standard references methodologies similar to international norms, such as ISO 4892-2 for xenon arc weathering. However, GB 13735 includes specific mandatory retention rates and coverage duration classifications tailored to China's agricultural environments. Importers should verify specific parameter thresholds rather than assuming parity with ISO limits.

The summary above provides a high-level overview of GB 13735-2017. To ensure complete compliance for your agricultural films entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 13735-2017 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: Y28
ICS: 83.140.10
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: Ministry of Industry and Information Technology

Relações

Substitui:GB 13735-1992