In the modern packaging industry, plastic bags are widely used in various fields such as food, medicine, daily chemical, electronics, etc. due to their lightweight, durability, and high cost-effectiveness, becoming a bridge connecting production and consumption. From fresh fruit and vegetable packaging in supermarkets to garbage collection bags in households, plastic bags are everywhere, and their sealing performance directly affects the shelf life, safety, and experience of products. Therefore, conducting strict sealing tests on plastic bags is not only a requirement of industry standards, but also an important measure to ensure product quality and protect consumer rights.

The use and importance of plastic bags

1. Food packaging: In the food industry, plastic bags are used as packaging materials that come into direct contact with food, and their sealing directly affects the freshness, taste, and safety of the food. Good sealing performance can effectively prevent the invasion of oxygen, moisture, and microorganisms, extending the shelf life of food.

2. Pharmaceutical packaging: The sealing requirements of packaging materials for pharmaceutical products are to prevent the drugs from getting damp, deteriorating, or contaminated. As a primary or auxiliary packaging material for drugs, the sealing test of plastic bags is a key step in ensuring the quality and safety of drugs.

3. Daily chemical products: For liquid or semi liquid daily chemical products such as shampoo, shower gel, etc., the sealing of plastic bags directly affects the stability of the product and its ability to prevent leakage, directly affecting the user experience.

4. Electronic product packaging: In the field of electronic products, although plastic bags do not directly participate in the realization of product functions, their sealing is equally important as a temporary protective measure against dust and moisture to prevent damage to electronic components during transportation and storage.

   
   

Given the importance of plastic bag sealing, it is crucial to adopt scientific and efficient testing methods. The MFY-05S plastic bag negative pressure sealing tester of Jinan Sanquan Zhongshi adopts the bubble method for testing, which is currently one of the mainstream methods for evaluating the sealing performance of plastic bags.

Sanquan Zhongshi's plastic bag negative pressure sealing tester, testing principle: During the testing process, partially or completely immerse the vacuum chamber in water to magnify the observation effect. If the sample has sealing defects (such as holes, cracks, or poor sealing), the pressure difference between the inside and outside will cause gas inside the sample to escape through the defect, forming bubbles. By observing the location, quantity, and duration of bubbles, the sealing performance of the sample can be intuitively and accurately determined.

The MFY-05S plastic bag negative pressure sealing tester from Jinan Sanquan Zhongshi provides a strong quality assurance tool for the plastic packaging industry with its scientific, intuitive, and efficient testing method. Through strict sealing testing, not only can products with quality hazards be screened out to avoid their adverse effects on the market, but it can also promote enterprises to continuously improve product quality.

Jinan Sanquan Zhongshi Experimental Instrument closely follows the requirements of national standards and also participates in the formulation of some national drug packaging material standards. By utilizing our years of technical accumulation and industry application experience in the field of testing, we provide data and theoretical support for the formulation of standards, and contribute to the establishment of the national standard system.