Moisture-proof packaging is widely used in various industries such as machinery, electronics, food, medicine, and daily chemicals. It serves as a common protective measure to prevent products from moisture damage during transportation and storage. Moisture-proof packaging plays a crucial role in preventing rust, deterioration, and other forms of degradation caused by humidity.
The GB/T 5048-1999 standard, titled "Damp-proof Packaging," clearly defines the levels of moisture-proof packaging and the corresponding testing methods. As an excellent provider of testing instruments and inspection services, Labthink is now introducing its standards and testing methods in conjunction with relevant equipment. This ensures that manufacturers can meet the requirements of the standard effectively.
**First, the standard of moisture-proof packaging**
| Level | Moisture-proof period | Temperature and humidity conditions | Product nature |
|-------|------------------------|--------------------------------------|----------------|
| Level 1 | 1–2 years | Temperature > 30°C, relative humidity > 90% | Sensitive to humidity, prone to rust or mold |
| Level 2 | 0.5–1 year | Temperature between 20–30°C, relative humidity 70% | Mildly sensitive to humidity, more expensive items |
| Level 3 | Within 0.5 year | Temperature < 20°C, relative humidity < 70% | Insensitive to humidity |
**Second, moisture-proof packaging requirements for moisture resistance of packaging materials and sealing performance**
1. **Moisture-proof material properties**: The selected packaging material should meet the water vapor permeability requirements according to the level specified. Water vapor permeability should be tested according to GB/T 1037 (plastic film and sheet method) and GB/T 6981 (rigid container test method). Flexible containers should follow GB/T 6982.
- Water vapor transmission capacity of moisture-proof packaging materials:
- Level 1: <2 g/(m²·24h)
- Level 2: <5 g/(m²·24h)
- Level 3: <15 g/(m²·24h)
2. **Sealing strength**: The heat-sealing strength of moisture-proof packaging should be tested according to GJB145A-1993. It must be greater than 30 N/5 cm.
3. **Sealing performance**: The sealing performance of moisture-proof packaging should be tested according to GB/T 15171. The package must not have defects like pinholes, cracks, or poor sealing.
**Third, moisture-proof packaging tests and testing methods**
1. **Water vapor transmission performance test**: The cup method is commonly used to test moisture permeability. Labthink's TSY-T series moisture permeability tester provides an automated solution, reducing manual intervention and increasing accuracy. It automatically performs the test, records results, and generates reports.
2. **Heat-sealing strength test**: The heat-sealing strength of moisture-proof packaging should be tested using a heat seal tester and a tensile testing machine. Labthink’s HST-H3 heat seal tester and XLW series tensile testing machines are designed for this purpose, ensuring accurate and reliable results.
3. **Sealing performance test**: The MFY-01 seal tester by Labthink is used to detect leaks in moisture-proof packaging. It simulates vacuum conditions to check for pinholes, cracks, or other defects.
In summary, moisture-proof packaging is essential for protecting sensitive products from environmental factors. By following established standards and utilizing advanced testing equipment, companies can ensure the quality and reliability of their packaging solutions. Labthink is committed to providing comprehensive testing and quality control services to support the industry in maintaining high standards of moisture protection.
Jinan Languang Electromechanical Technology Co., Ltd.
: Jinan Languang Market Department
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Onion Powder
Onion powder, as the name suggests, is a powdered condiment made from fresh onion, finely processed through dehydration, drying and grinding. It not only retains the characteristic pungency and aroma of onion, but also facilitates the use and storage of onion to a great extent.
Onion powder plays an important role in cooking. Whether you are stir-frying, stewing or making sauces, you can easily add a rich onion flavor to your dishes by just sprinkling the right amount of onion powder. It makes the cooking process easier and quicker, while allowing the onion flavor to penetrate more evenly into the ingredients.
In addition, onion powder has some nutritional value. It is rich in sulfides, vitamin C and many minerals, which have a positive impact on human health. Sulfides have antibacterial and anti-inflammatory properties, while vitamin C helps to boost the immune system and keep the skin healthy.
onion powder, onion ground, white onion powder
Henan Sunny Foodstuff Co.,Ltd. , https://www.hnsunnyfood.com