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Inspection Method Of Corrugated Box
Aug 02, 2017


Corrugated box with its characteristics and environmental advantages are widely used in the packaging of goods, in the transport of goods, preservation and sales played an important role in protection. In the use of the process, the need for corrugated boxes must achieve a certain degree of firmness and durability.

At present, the fierce market competition, so that each corrugated carton production enterprises in the production process and management of continuous improvement to maximize profits, Corrugated Paper Box this makes the corrugated box users in the process of using corrugated box encountered more or less quality problems, such as corrugated box heap code after collapse, rupture and so on caused many unnecessary losses.

In order to avoid such a situation, the production of qualified corrugated box products, the corrugated box must be tested, so that the production process of corrugated box is effectively controlled. Therefore, Corrugated Paper Box the correct understanding and understanding of the corrugated box inspection items and testing methods, has a very important significance.

Basic test items

Qualified corrugated boxes require printing patterns, clear handwriting, no disconnection and lack of conditions; pattern chroma consistent, bright bright and printing position error small, large corrugated box error within 7mm, small corrugated box error within 4mm. Surface quality to be intact without damage, no stain, box four weeks without loopholes, each box cover after closure. For Corrugated box shape, box inner diameter and design dimension tolerance should be kept in large box ±5mm, small box ±3mm, the size of the overall size of the same. Corrugated Paper Box Corrugated box with open, 180-degree reciprocating folding 5 times, one or two types of corrugated box and the layer, three types of corrugated box the length of the inner crack is not less than 70mm. In addition, the requirements of the box Joint specification, edge neat, not overlap angle.

Water content

The so-called water content refers to the corrugated original paper or paperboard in the amount of moisture, expressed in percentages, the water content of corrugated carton box strength has a great impact, is a corrugated box 3 of the inspection of heavy defects.

Corrugated original paper has a certain pressure, anti-Zhang, anti-puncture and folding performance, if the moisture content is too high, paper quality is soft, poor, pressure and bonding quality is poor. Corrugated Paper Box If the moisture content is too low, the paper is too brittle, the pressure is easy to rupture, and the tolerance is poor. If the water content of corrugated cardboard and cardboard paper is too large, the corrugated board produced by single-sided Machine is prone to curl and laminating, which is prone to foaming and degumming. Corrugated Paper Box Molded corrugated box if the moisture absorption in the preservation of damp, will make the strength of corrugated box obviously decreased, affecting the use.

The standard of water content of corrugated box is (12±4)%. Determination of water content in corrugated box, the more accurate detection method is the drying method, that is, Corrugated Paper Box from the cardboard or box different parts of the sampling blocks, weighing about 50g with the balance of the sample, and tear it into pieces into the oven, drying to constant weight, you can find its moisture content. The calculation formula of water content is:

Water content = (the original weight of the specimen-the weight of the specimen after drying) The original weight of the specimen $number

Cardboard thickness

Corrugated board thickness refers to a certain pressure under the corrugated board under the vertical distance, the unit is mm, corrugated box is a flaw in the inspection of the project, and directly affect the edge of the cardboard, the strength of the puncture and compressive strength and other properties. Corrugated Paper Box There are many reasons to affect the thickness of paperboard, if the thickness of corrugated board is thin, the edge compressive strength, puncture strength and compressive strength will be reduced correspondingly. Corrugated cardboard, the thickness of the different.

The thickness of paperboard is usually measured by the corrugated board thickness meter in the laboratory. The thickness gauge has a circular chassis of the anvil and the cylindrical measuring head, Corrugated Paper Box the measurement results can be read through the monitor. The pressure exerted by the measuring head is 20kpa±0.5kpa, the diameter of the measuring surface is about. 6mm.

Corrugated box weight measurement in the corrugated box enterprise is also an important work, corrugated box enterprises in the export declarations and in the statistical output need to measure the box weight. In addition, sometimes the customer will be the box weight as a standard for the inspection of corrugated boxes. The box weight test method of Corrugated box is very simple, but it is susceptible to water, which causes the weight of the box to deviate from the true value.

Measuring tools generally use a precision of more than 1 grams of electronic balances, weighing range should be in the 0~5kg. Three samples were randomly sampled from the same corrugated box when measured. In accordance with the gb/t10739 standard, in the relative humidity (50±2)% and temperature 23±1℃ environment balance more than 24 hours, and then test three samples of the box weight, calculate the average value of three weight, that is, for this batch of corrugated box weight.

It is very important to pay attention to the temperature and humidity balance treatment of the specimen, which has not been measured by the temperature and humidity balance, and the box weight error can reach more than 15%.

The moisture content of corrugated box is an important factor that affects the weight of the box, but many corrugated box manufacturers or customers are limited by the time of delivery or test condition, which is weighed by the temperature and humidity balance, which results in serious deviation from the real value of the box. To this end, the rapid measurement method can be used, without temperature and humidity balance that is accurate test box weight.

A lot of experimental data show that corrugated box in the standard temperature and humidity environment full balance, water content is about 8%, and the dry weight of corrugated carton is unchanged,Corrugated Paper Box  so we can only measure the weight and moisture content of corrugated box before the balance of temperature and humidity, the real weight of corrugated box is calculated.

Measurement, also from a number of corrugated boxes randomly selected three corrugated cardboard as a test specimen. The weight of the box weighing three samples is weighed, and the average value is taken. The measured value is reference weight, expressed in MC, the Unit is G, and then the water of three samples is measured, the average value is measured by W, and the unit is "%".

Finally, the measured MC value and W value are entered into the formula, then the standard box weight after the balance of temperature and humidity can be calculated, expressed in M. The calculation formula of standard box weight is: M=MCX (1-w)