Test items and methods required for food packaging QS certification
According to the Regulations on the Administration of Production Licenses for Industrial Products, since September 1, the quality supervision department will comprehensively investigate and obtain the production license certification for food packaging , containers and other products, while producing, selling or using paper products. the behavior of. With the increasing emphasis on food safety, the problem of excessive residue of harmful substances in food packaging printing has become the focus of consumers. People have called for enterprises to pay attention to the environmental protection of packaging materials in printing while paying attention to the production of green food .
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GBT1014-2010 Food packaging paper specifies the classification, requirements, test methods, inspection rules and signs, packaging, transportation and storage of food packaging paper. According to the standard, the physical indicators that food packaging paper needs to be tested are:
I. Quantitative grammage: Determine the mass per unit area of ​​paper and paperboard in grams per square meter (g/m2) according to the specified test method. Test method: five samples were stacked in the longitudinal direction of the paper into five layers, and then the FH-CB 100 circular quantitative sampler was used to take a uniform sample of 0. 01 m2 in the transverse direction, a total of 10 samples, with corresponding The balance of the scale value is weighed, the mass of the sample is 5g or less, the scale value is 0.001g, the mass of the sample is 5g or more, the scale value is 0.01g, and the mass of the sample is 50g or less. Degree 0.1 g balance.
2. Tensile index: Index of tensile strength divided by quantitative, expressed in Newton meters per gram (Nm/g)
Test method: FH-CB 15 standard paper cutter was used to cut a 15 mm wide specimen, and a sufficient number of specimens were cut at one time to ensure that the paper and paperboard had 10 effective measurement results in the longitudinal and transverse directions. Then FH- T300 computer tensile tester Rally test
Adjust the gap between the chucks to 180mm, and then clamp the sample to be sandwiched between the two chucks. Adjust the stretching speed to (20±5)mm/min. After the test, input the sample into the instrument. The instrument will automatically calculate the tensile index. The FH- T300 computer tensile tester is equipped with a built-in printer, or it can be connected to a computer to save data to the computer.
3. Water absorption: Water imbibition: The performance of paper and its products in absorbing water in water, expressed in grams per square meter (g/m2), not suitable for quantitative less than 50g/m2, low sizing or more Pinhole paper and embossed paper are not suitable for uncoated cartonboard. Test method: Firstly use the FH-CB 125 Bob sampler to take a circular sample (5 sheets of front and back) with a diameter of (125±5) mm, and then test with the FH- COBB absorbableness tester . 100 ml of water was poured into the cylinder, and then a sample of a good quality was placed on the annular surface of the cylinder. With the test face down, the gland is placed over the specimen and clamped to secure it to the cylinder. Turn the cylinder 180° while turning on the stopwatch. 10 to 15 s before the end of water absorption, the cylinder is turned upright, the gland clamping device is released, and the sample is sampled. Note that after each test 5 times, the test water should be replaced to avoid affecting the test results. At the moment when the specified water absorption time is reached, the sample that has been removed from the cylinder is placed on the pre-packed absorbent paper (quantitatively should be 200g/m2 to 250g/m2) with the water absorption side facing down, and then in the sample. Place a piece of absorbent paper on top, and immediately use a metal press roll to rewind the roll once in 4 seconds without additional pressure to dry the remaining water on the surface of the sample. The sample is quickly removed, the water-washed cotton is folded inward, and then folded once and weighed to the nearest 0.001 g. Bo value C = (mass after water absorption - mass m1 before water absorption) * 100.
Four tear index Tearing resistance: a pre-cut tear strength paper or paperboard to a desired length, the paper tearing expressed in millinewtons m² / g (mN.m² / g).. Test method: use a paper cutter to cut the size of (63 ± 0.5) mm × (50 ± 2) mm, longitudinal and lateral at least 5 effective tests, use FH-TST2000 tear tester, select the appropriate according to the sample the release mechanism or pendulum weight, pendulum was raised to the original position and fixed with the pendulum, the front half of the sample against the knife blade facing the other half. The side edges of the specimen should be neat, and the bottom edge should be completely in contact with the bottom of the clip and clamped positively. Use a cutter to cut the sample into a neat blade and return the knife to the rest position. Quickly press the release device of the pendulum. When swinging back, swing it gently by hand and read the data on the display. The FH-TST2000 tear tester is more convenient than the pointer-type tear tester and the data is more reliable.
V. Burst index: Burst index divided by its basis weight, expressed in kilopascals per gram (kPa·m2/g). Test method: Using the FH-BST 160 paper breakage tester, cut the sample into 70mm × 70mm , and input the quantitative amount into the instrument. The instrument can automatically calculate the bursting index by measuring the burst strength. The FH-BST 160 Paper Burst Tester is equipped with a built-in printer and can be connected to a computer to save data to a computer.
6. Dust degree: Dirt count: the number of impurities in a certain area of ​​paper and paperboard, or the equivalent area (mm2) of impurities on paper or cardboard per square meter. Test method: Cut the sample into 250mm×250mm, at least 4 pieces, and use a FH-PP01 dust meter to place a cut sample on the rotatable sample plate and press it with the four corner clamps on the plate. Under the fluorescent lamp, check the visible dust on the surface of the paper and cardboard. The distance between the eyes and the eyesight is 250mm~300mm. Use different marks to circle the dust of different areas. The sample plate is then rotated 90° and the newly discovered dust is marked after each rotation until it returns to its original position. Then follow the above method to check the other side of the sample.
Seven content Fluorescence Fluorescence: diffuse blue reflectance factor R 457 can be directly attributed to the effect of optical brighteners portion.
Test method: Using the FH- 48B whiteness meter, the whiteness of the sample is first detected, and then the fluorescence of the sample is detected. The FH- 48B whiteness meter can only measure more than 0.2% of the fluorescence content. If it is lower than this, a qualitative test can be performed using a dark box type three-purpose ultraviolet analyzer.
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