**Chinese Packaging Network News: Enhancing Moisture Resistance in Biscuit Packaging**
Biscuits are a popular crispy snack made primarily from wheat flour, with added sugar and fat, and baked to create a crunchy texture. They are often consumed as a quick snack during travel, rest, or leisure time. Due to their low moisture content, biscuits are highly sensitive to humidity. In high-moisture environments, they can absorb water vapor from the air, leading to a loss of crispness and potentially creating conditions favorable for microbial growth, such as mold. Therefore, improving the moisture resistance of biscuit packaging is essential to maintain product quality and extend shelf life.
**Current Status of Biscuit Packaging Materials**
The most commonly used packaging materials for biscuits are plastic and aluminum composite films. To evaluate the moisture permeability of these materials, several testing methods are employed in China, including the gravimetric (cup) method, electrolysis method, moisture method, and infrared method. These tests follow national standards such as GB 1037-1988, GB/T 16928-1997, GB/T 21529-2008, and GB/T 30412-2013, which provide standardized procedures for measuring water vapor transmission rates.
**Test Sample and Equipment**
In this study, an aluminum-coated composite film used for biscuit packaging was tested. The Labthink W3/031 Water Vapor Transmission Rate Tester was used to measure the moisture permeability of the sample. This device operates based on the gravimetric method, where the test sample is placed between two chambers with different humidity levels. Water vapor diffuses through the material, causing a change in weight that is measured over time to determine the transmission rate.
**Applications and Features of the Testing Equipment**
The W3/031 device is versatile and suitable for a wide range of materials, including plastic films, paper-plastic composites, nonwovens, textiles, and even specialized materials like LCD films and protective clothing. It complies with numerous international and national standards, such as ASTM E96, ISO 2528, and GB 1037, ensuring reliable and accurate results.
Key features of the equipment include:
- A wide testing range (0.1–10,000 g/m²·24h) with high precision (0.01 g/m²·24h).
- Simultaneous testing of up to three samples.
- Precise temperature (15–55°C) and humidity control (10%–98% RH).
- Standard purge wind speed to maintain consistent humidity differences.
- Two calibration options: standard film and standard weight.
- Patented mechanical design for stable and accurate measurements.
- Integrated Lystemâ„¢ data management system for efficient lab operations.
**Testing Procedure**
Three samples of 74 mm diameter were cut from the aluminum composite film. Distilled water was added to the moisture-permeable cups, and each sample was attached to one cup. The cups were then placed in the test chamber, and parameters such as temperature, humidity, and thickness were set via the software. The device automatically recorded weight changes at regular intervals, allowing the calculation of the water vapor transmission rate.
**Test Results**
The water vapor transmission rates of the three samples were measured as 1.032 g/m²·24h, 1.061 g/m²·24h, and 1.027 g/m²·24h, respectively. These values indicate a relatively low moisture permeability, suggesting good barrier properties for the packaging material.
**Conclusion**
Water vapor transmission rate is a critical parameter in evaluating the performance of biscuit packaging. It directly affects the quality and shelf life of the product. The W3/031 Water Vapor Permeability Tester offers a reliable, efficient, and accurate solution for assessing moisture resistance in flexible packaging materials. Labthink continues to provide advanced testing solutions for the packaging industry, including tensile testers, thickness gauges, sealers, and more. For more information, visit our website or contact us directly.
*Copyright Notice: This article is copyrighted by Jinan Languang Electromechanical Technology Co., Ltd.*
Ceramic Ochid Pot
Material: Ceramic orchid pots are typically crafted from clay-based materials that are fired at high temperatures to achieve durability and strength. They can vary in texture, from smooth and glossy to rough and matte, depending on the specific ceramic composition and finish.
Design: These pots often feature a wider base and narrower opening, providing stability for the orchid plant while allowing for proper aeration and drainage. The design may include decorative elements such as embossed patterns, painted motifs, or textured surfaces, enhancing the aesthetic appeal of the pot.
Size: Ceramic orchid pots come in a range of sizes to accommodate different orchid species and growth stages. They can vary from small pots suitable for single orchid plants to larger containers capable of holding multiple plants or larger root systems.
Color: The color of ceramic orchid pots can vary widely, offering options to complement various orchid flower colors and interior or outdoor décor themes. Common colors include white, beige, terracotta, green, blue, and various shades of earth tones.
Drainage Holes: Proper drainage is crucial for orchid health, and ceramic orchid pots typically feature multiple drainage holes at the bottom to prevent waterlogging and root rot. These holes allow excess water to escape freely while providing adequate aeration to the orchid roots.
Saucer or Tray: Some ceramic orchid pots come with matching saucers or trays to catch excess water drainage, protecting surfaces from moisture damage and providing a tidy appearance.
Insulation: Ceramic pots offer some insulation against temperature fluctuations, which can be beneficial for orchids, helping to maintain stable root temperatures in varying environmental conditions.
Longevity: Ceramic orchid pots are known for their durability and can last for many years with proper care. They are resistant to fading, cracking, and weathering, making them a reliable choice for long-term orchid cultivation.
Overall, ceramic orchid pots blend functionality with aesthetics, providing a stylish and practical solution for growing orchids indoors or outdoors while enhancing the beauty of the plants they contain.
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