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Air Bubble Tester for BOPET Film Leaf Disc - China Suppliers and Factory Solutions
Test Principle & Process
Impregnation of a test piece (Disc filter) with a test liquid. Immersion of the test piece in the test liquid and introduction of a gas (usually air) into the test piece at gradually increasing pressure. Determination of the pressure at which bubbles are emitted from the surface of the test piece. Evaluation of the equivalent bubble test pore size by means of a mathematical formula.
Bubble Test Pore Size Definition
The maximum equivalent capillary diameter in the test piece which is calculated from the measured minimum pressure required to force the first bubble of gas through the test piece (under standardized conditions) impregnated with a liquid.
Application Areas
- Used as factory-entry quality detection for new disc filter.
- After the disc filter is used, whether it is damaged.
Test Indicators
1. First bubble point
The bubble test pore size corresponds to the minimum differential pressure at which constant bubbling first occurs.
2. The uniformity of distribution of pores
These particular definitions should be agreed between the supplier and the user. Moreover, the uniformity of distribution of pores approaching the maximum pore size may be observed by gradually increasing the gas pressure. Cracks and clogged areas are easily discerned by this operation.
Model Specification: BPT-B
This agreement is made with φ305mm, the accuracy of 40um disc filter as an example.
| Test Object | Disc Filter: φ177.8 - 306mm |
| Filtering Accuracy | 5 - 60um |
Technology Performance
- It is pressed the disc filter by cylinder.
- Digital display of bubble pressure and flow.
- Equipped with an automatic air exhaust device to avoid environmental pollution caused by the volatilization of IPA.
- Equipped with circulation filtration of IPA to extend IPA usage time.
- Provided with a visual sliding door for convenient observation.
- Equipped with a storage tank to return the test liquid once the test is completed.
Frequently Asked Questions (FAQ)
Q1: What is the main purpose of the bubble test pore size measurement?
The test is primarily used as a factory-entry quality detection method for new disc filters and to determine whether a disc filter has been damaged after usage.
Q2: How is the bubble test pore size calculated?
It is calculated using a mathematical formula based on the measured minimum pressure required to force the first bubble of gas through the liquid-impregnated test piece under standardized conditions.
Q3: What are the primary test indicators for this equipment?
The primary indicators are the "First bubble point" (the minimum differential pressure at which constant bubbling first occurs) and "The uniformity of distribution of pores."
Q4: How does the equipment detect cracks or clogged areas?
By gradually increasing the gas pressure, the operator can observe the uniformity of pore distribution approaching the maximum pore size. Cracks and clogged areas are easily discerned during this process.
Q5: What sizes of disc filters can be tested with Model BPT-B?
Model BPT-B supports disc filters with diameters ranging from φ177.8mm to 306mm, and a filtering accuracy range of 5 to 60um.
Q6: How does the BPT-B model handle IPA volatilization and liquid recovery?
The equipment is equipped with an automatic air exhaust device to prevent environmental pollution from IPA volatilization. Additionally, it features IPA circulation filtration to extend usage time and a storage tank to return the test liquid after testing is complete.