Moisture-proof packaging is widely used in various industries, including machinery, electronics, food, pharmaceuticals, and daily chemicals. It serves as a common protective measure to shield products from moisture during transportation and storage. The primary function of moisture-proof packaging is to prevent rust, deterioration, and damage caused by humidity.
The Chinese national standard GB/T 5048-1999 provides clear definitions for 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, offering detailed guidance for manufacturers and users.
**First, the standard of moisture-proof packaging**
The moisture-proof packaging level is categorized into three levels based on the expected protection period, environmental conditions, and product sensitivity:
| 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 mildew |
| Level 2 | 0.5 year | Temperature between 20–30°C, Relative Humidity between 40%–70% | Mildly sensitive to humidity, more expensive or delicate products |
| Level 3 | Within 0.5 year | Temperature < 20°C, Relative Humidity < 70% | Insensitive to humidity, less critical products |
**Second, requirements for moisture resistance of packaging materials and sealing performance**
1. **Material Properties (Moisture Barrier):**
Packaging materials should be selected according to the required moisture-proof level. Water vapor permeability must meet the specifications outlined in GB/T 1037 (for plastic films) and GB/T 6981 (for rigid containers), while flexible containers should comply with GB/T 6982. The water vapor transmission rate of the material and container must fall within specified limits:
| Moisture-proof Level | Film (g/m²·24h) | Container (g/m²·30d) |
|---------------------|------------------|------------------------|
| Level 1 | <2 | <5 |
| Level 2 | <5 | <120 |
| Level 3 | <15 | <450 |
2. **Sealing Strength:**
The heat-sealing strength of moisture-proof packaging should be tested according to GJB145A-1993 and must exceed 30 N/5 cm. This ensures that the seal remains intact under normal handling conditions.
3. **Sealing Performance:**
The sealing performance of the package must be tested according to GB/T 15171. The test involves subjecting the package to vacuum conditions to detect any leaks, such as pinholes or cracks. If continuous bubbles are observed, it indicates a defect in the seal.
**Third, moisture-proof packaging testing and methods**
1. **Water Vapor Transmission Test:**
Moisture-proof packaging materials are tested using the cup method, which measures the amount of water vapor that passes through the material over time. Labthink’s TSY-T series instruments automate this process, ensuring accurate and reliable results without manual intervention.
2. **Heat-Sealing Strength Test:**
The heat-sealing strength is tested using a heat sealer and a tensile tester. Labthink’s HST-H3 heat sealer simulates real-world sealing conditions, while the XLW series tensile testers evaluate the strength of the seal. These tools help ensure that the packaging can withstand normal handling and transportation.
3. **Sealing Performance Test:**
The MFY-01 seal tester from Labthink is used to check for defects such as pinholes or cracks in the package. The test involves placing the package in a vacuum chamber filled with a liquid medium and applying vacuum pressure. Any leakage or bubble formation indicates a problem with the seal.
In summary, moisture-proof packaging plays a crucial role in protecting products from environmental damage. Labthink offers comprehensive solutions for testing and quality control, helping manufacturers meet industry standards and improve product safety. For more information, please contact us at Jinan Languang Electromechanical Technology Co., Ltd.
Ginger Flakes
Dried ginger flakes are a versatile spice made from the drying and cutting of ginger root into small, irregular pieces. These flakes offer a convenient way to incorporate the distinct flavor of ginger into various culinary creations.
Ginger, along with onion and garlic, is one of the three most commonly used cooking seasonings. With them as a seasoning not only can make the dishes add flavour and aroma, and their unique spicy taste can stimulate people's appetite, increase their appetite. In addition, scientists have found that ginger also has the role of health care and healing. Ginger contains ingredients that can effectively treat gastrointestinal diseases, colds and flu, rheumatic pain and nausea and vomiting and other diseases, and enhance the body's immune system. That's why people have long been interested in ginger not only for cooking, but also for their health.
Retaining the essence of ginger's taste profile, dried ginger flakes provide a milder and slightly different taste compared to fresh ginger. They are prized for their ease of use and can be added directly to dishes without rehydration.
Their application spans across cuisines: from enhancing the flavor of soups, stews, and marinades to infusing a gentle warmth into teas or homemade spice blends. Dried ginger flakes effortlessly deliver the characteristic zing and aroma associated with ginger, making them a go-to ingredient for those seeking convenience without compromising on flavor.
Ginger Flakes, Ginger Slices, Yellow Ginger flakes
Henan Sunny Foodstuff Co.,Ltd. , https://www.hnsunnyfood.com