Carton preprocessing before the test, the experimental samples in 23 oc, under the condition of 50% rh for processing. Until the size of the experimental sample moisture content to 6% ~ 10%, beginning in the experiments. If you fail to reach moisture content requirements for processing, until all requirements are satisfied with the moisture content. Moisture content pick one carton samples, from different parts of the measurement of four points, uniform arithmetic value, accurate to 1%. From different parts of the same box according to samples from about 50 g, tear into small pieces into a known quality weighing box, within 100 ℃ ~ 105 ℃ oven drying to constant weight ( Weighing is not greater than twice the original sample weight of 0. 1%) 。 Every time weighing shall be accurate to 0. 001g。 The moisture content of press type calculation: type: moisture content, X % sample quality before drying, g sample quality after drying, g appearance inspection corrugated carton appearance inspection under the natural light, with visual and dividing value of 1 mm steel ruler for inspection. For in addition to the measurement of moisture content of the sample of the other 6 cartons for inspection. Inside diameter, outside diameter dimension measurement for measuring moisture content of the samples of the other 6 cartons for inspection. Corrugated carton outside diameter size measurement will open the corrugated carton forming, after close the cover and the lower wave cover, depend on gauge, pressure plate (roll cover pressure on 10公斤) 。 By dividing the value 1 mm steel ruler measure length, width and height of separation, reading is accurate to 1 mm. Corrugated carton inside diameter size measurement will open the corrugated carton forming, after close the cover and the lower wave cover, depend on gauge, pressure plate (roll cover pressure on 10公斤) 。 On open cover, the clamp pressure under the box cover, and on the box, put the steel ruler, with dividing value of 1 mm diameter feet measurement, accurate readings to 1 mm. Rolled cap folding in addition to the measurement of moisture content of the sample of the other 6 cartons for inspection. Open molding, will shake cover folded inward folding 90 °. To this point, 270 °, so close to one time. Reciprocating fold three times. Experiments of 5 samples of the cartons. Check the inner and outer layer for cracks and crack length. Accurate to 1 mm. The thickness of the corrugated carton measurement according to GB/T 6547 - 1998. Samples selected three cartons, each carton in the printing and the printing area on a 250 mm x 250 mm from each sample at each sample from the marginal than 50 mm, random measure 4 points, accuracy of reading to zero. 01 mm, take its uniform arithmetic value of measurement results, revised to zero. 01mm。 Sample of the small distance between marginal and circular fan plate marginal not less than 50 mm, measurement in 2. 5毫米/分钟±0。 The activity at a rate of 5 mm/min surface pressure on the sample, and shall ensure that the specimens with the thickness gauge measurement parallel to the plane. When the steady value for punctuality immediately reading, reading, shall not be hand pressure on the instrument and the specimens. Pop strength according to GB/T 6545 - 1998. On the three cartons cropping 20 pieces of sample, sample size 150 mm * 150 mm, and can not have the watermark, crease or significant damage. Divide the sample, with both the front and stick to the film sample separation were determined. Will sample clamped between two sample holder ring, start the meter, with 170 ml/min + 15 ml/min speed gradually adding pressure, exploded in sample, read the value of pressure gauge on the instructions, accurate to 1 kpa. Experiments, significant sliding, sample data should be abandoned, and make up the sample weight. All accounting measurement value arithmetic evenly, accurate to 1 kpa. Marginal pressure strength according to GB/T 6546 - 1998. Cropping on the 3 cartons only 20 pieces of sample, sample size 25 mm x 100 mm, corrugated direction for the short side, slice the 10 pieces of sample, the sample may not have watermark, crease or significant damage, cut must lubrication, straight, straight and marginal in cardboard appearance. Put sample at the center of the press table, make the sample of the short edge straight on two tablets, reoccupy guide block support sample, end face and the two plate junction straight, parallel to each other, and go straight on corrugated board appearance. To start the pressure testing machine, with 12. 5毫米/分钟±2。 5 mm/min speed moving platen, apply pressure until the sample crush. Sample would be acceptable to pressure, accurate to 1 n. And the marginal pressure strength press type, with N/m indicates that type: straight ECT marginal pressure strength, N/mF pressure, long side of the scale of the NL specimen, mm. Uniform calculation of marginal pressure strength values. Tumble strength according to GB/T 2679. 7 - 1981. On the three cartons evenly cut take 8 pieces of sample, sample size 175 mm * 175 mm, and can not have the watermark, crease or significant damage. All sample, half in surface layer is stuck to the pyramid, the other half to the inner stick to the pyramid. Samples of each side, half sample in vertical parallel to the direction of the swing of the pendulum, the other sample to horizontal. All accounting measurement value arithmetic evenly, accurate to 0. 1J。 Compression chamber for other 3 carton only empty compressive tests. With sealing tape sealing, choose a vertical and two horizontal article inside back cover. After sealing the carton sample into the pressure experiment machine between the press table. To clamp down on since the start of the pressure testing machine, its n 220 pressure for the carton sample.
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