The National Entry-Exit Inspection and Quarantine Bureau serves as the official authority overseeing the inspection and regulation of imported and exported goods within China's foreign trade system. This includes ensuring the quality and compliance of export cartons. The bureau establishes its own set of inspection and quarantine standards, which are specifically tailored for the export process. These standards differ from general national standards, as they provide more detailed guidelines and specifications that are directly relevant to the export requirements.
In contrast, the national standards cover a broader range of testing methods and technical specifications applicable to all common packaging forms in China. For manufacturers, understanding these distinctions is essential to meet both domestic and international market demands.
As the use of cartons continues to expand across various industries, the importance of testing their performance characteristics has grown significantly. Key tests for paper products and cartons include:
1. **GB6543-2008** – This standard outlines the testing procedures for corrugated cartons, with a primary focus on compression and stacking strength. These tests ensure that cartons can withstand the pressures of transportation and storage.
2. **GB/T 13024-2003** – This standard covers various properties of boxboard materials, including weight, thickness, tightness, burst resistance, transverse ring pressure, fold resistance, water absorption, and moisture content. It helps determine the suitability of materials for different packaging applications.
3. **GB/T 6544-2008** – This standard focuses on the mechanical and physical properties of corrugated cardboard, such as thickness, edge crush strength, adhesive strength, burst strength, puncture resistance, and moisture content. These factors are critical in determining the durability and reliability of the packaging.
4. **GB/T 13023-2008** – This standard evaluates the performance of corrugated base paper, covering aspects like weight, tightness, transverse ring compressive strength, longitudinal cracking length, and moisture levels. It ensures the material meets the necessary quality criteria.
5. **GB/T 451.2-2002** – This standard provides the method for determining the grammage (weight per unit area) of paper and paperboard, which is one of the most fundamental properties. Grammage is expressed in grams per square meter (g/m²) and is crucial for assessing the quality and suitability of paper for specific uses. Accurate measurement requires the use of a circular punch sampler and a balance with at least 0.01 g precision to ensure reliable results.
By adhering to these standards, manufacturers can ensure their products meet both domestic and international requirements, enhancing their competitiveness in global markets.
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