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The moisture-proofing performance detection method of coffee powder bag and the instrument coffee powder are a common brewing drink, which requires higher moisture-proofing of the bag.
variety of coffee, packaging forms are mainly glass bottles, metal cans, soft plastic packaging bags three, no matter what form of packaging used, it is required to have good moisture resistance.
This is because coffee has the characteristics of moisture absorption, if the humidity of the environment is large, it will absorb water vapor in the environment, resulting in increased moisture content, affecting the coffee grinding and flavor taste, coffee powder prone to lumps, while coffee moisture will also increase its risk of moldy, greatly shorten the shelf life.
, excellent moisture resistance is one of the basic requirements for coffee packaging.
This time we will take a brand of coffee powder aluminum composite film packaging as an example, for you to introduce the packaging moisture resistance performance detection methods, and introduce the use of test instruments - W3/030 water vapor pass rate tester.
moisture resistance of the packaging is mainly verified by the water vapor pass rate, the reference standard is GB 1037-1988 "plastic film and sheet water-permeable vapor test method cup method."
test process: (1) thickness measurement.
randomly selected 10 points on the surface of the sample to measure its thickness, and the thickness of the sample is an arithmetic average of the thickness of each point.
(2) sample.
sample 3 pieces with a diameter of 74 mm are randomly cropped from the sample surface using a special sampler.
(3) dosing.
to 3 permeable cups to add a certain amount of distilled water, the cut sample is clamped in 3 permeable cups, in the actual use of packaging coffee powder, the sample printing surface environment humidity is usually higher than the hot cover, so when loading the sample printing face to the high humidity side.
the test cavity door by putting the wetting cup holder in the test cavity of the equipment with a wet cup clamped to the test.
(4) test.
the test temperature, humidity, sample thickness and other parameter information, click on the test option, the test began.
equipment automatically weighs the weight of the permeable cup according to the set time interval, and automatically calculates and displays the test results such as the water vapor pass rate according to the measurement results.
test results: The thickness of aluminum-plated composite film samples tested in this paper was 76.1 m, and the average water vapor pass rate was 0.901 g/(m2.24h).
W3/030 water vapor pass rate tester is based on the principle of cup method testing, is a professional water vapor pass rate test system for film samples, suitable for plastic film, composite film and other films, flaky materials and medical, building materials and other materials of water vapor pass rate determination.
through the determination of water vapor pass rate, to achieve the control and regulation of materials technical indicators to meet the different needs of product applications.
: ISO 2528, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 000 92003 Technical indicators: Test range: 0.1 to 10,000 g/m2.24h (regular) Number of samples: 1 to 3 system resolution: 0.001g test accuracy: 0.01 g/m2.24h test temperature: Temperature control accuracy: ±0.1 degrees C (conventional) Test humidity: 10% RH to 98% RH (standard 90%RH) humidity control accuracy: ±1% RH blowing wind speed: 0.5 to 2.5 m/s (non-standard optional) test area: 33 cm2 x 3 samples Quantity: 3 specimen thickness: ≤3mm (other thickness requirements can be made) Sample size: 74 mm test case volume: 15 L air source: air source pressure: 0.6 MPa Interface size: 4mm polyurethane tube Dimensions: 695mm (L) ×555mm (W) ×390mm (H) Power: 220VAC 50Hz / 120VAC 60Hz net weight: 76kg