With the changing world economy, Corrugated paper Box industry situation is gradually during this period, the Corrugated Carton as a low-margin business, every step will be cautious. Corrugated box is a system of quality control engineering, there is involved in all aspects of production processes.
Standard sources and the development Every customer will have their own independent test. Upon receipt of customer orders at the beginning, we will carefully analyze the clients standards, the standards in clients often have a lot of text description. As many of whom are independent of many processes and related statements, operators tend to look confused, if we distribute these standards directly to the workshop or departments, these standards will tend to be shelved, useless.
Our early days of receipt of customer orders to do work that some of the standards into their internal corporate standards, these standards require simple, easy to understand and operate. Standard decomposition of the client one by one, according to the order of production were distributed to Purchase , Technology, production, quality control and so on each link, then all departments must work in order to set their own processes and operations program.
Base paper is Carton The main raw materials, quality control is often the first step in cardboard boxes.
The quality of the base paper carton strength, bursting strength, compression strength, moisture-proof effect, folding endurance, printing effects, and so on all aspects of cutting operation, so the quality of the entire procurement base paper quality control source. Customer's standards often provide physical indicators of cartons, paper, name and weight requirements, and we need to calculate the paper according to these requirements related to the physical indicators, procurement and acceptance as a standard.
Corrugated paper and cardboard between the physical indicators
Corrugated box is constituted by the dimensions of corrugated paper, anti's formula is based on calculation of the physical properties of base paper cardboard cartons of compressive strength, to see whether it can meet the requirements of: corrugated boxes can also be scheduled according to the compressive strength requirements , choose some corrugated board base paper.
P = Px? KP - compressive strength of corrugated box of empty containers (unit N) Px - corrugated board base paper of horizontal integration ring crush strength (in N / cm).
Which three integrated corrugated board base paper ring crush strength is calculated as:
Px = (R1 + R2 + RmC) / 15.2 integrated corrugated board base paper ring crush strength is calculated as:
Px = (R1 + R2 + R3 + RmlCl + Rm2C2) / 15.2Rn-- tissues lateral ring crush strength of the test force value (N/0.152m) Rmn - horizontal corrugated paper testing ring crush strength value (N/0.152m) C - corrugated shrinkage rate, which is of corrugated paper and tissues, the ratio of the length.
(CA = 1.532, CC = 1.477, CB = 1.361)
K?? Integrated ring crush strength in the empty boxes in the RMS, is calculated as KA = 30.3 +0.2752-0.000522 K = c = 27.9 +02652 a 0000522K = B: 24.6 +02352 a 0000522K 5 AA = 41.7 +0.355 Z-0.000522KjBB = 33.2 +0.3052-0.000522 K V cc = 38.1 +0.3452 a 0.000522KjAB = 38.2 +0335 Z-0.000522KjAc = 402 +0.355 Z-0.000522KjRr = 35.7 +0.325 Z-0.000522 A-3 - A three-storey corrugated boxes, three boxes perimeter of the range:
70cm ~ 200cm 5 AC?? Five AC corrugated box, five boxes perimeter of the range:
70cm ~ 300cm compression formula can only estimate the ring crush strength of paper, and in fact affect the compressive strength of corrugated box there are many factors, should include the paper ring crush strength, tensile strength, burst strength, close degrees, as well as waterproof and absorbent paper and so on.
Tensile strength, tensile strength corrugated paper base paper fiber depends on the structure of the bond between the fiber strength, tensile strength is good or bad not only affect the base paper used in the process of pulling force in the mechanical, but also affect the quality of carton compression molding the future, usually, if the ring crush strength of a good paper, and breaking length and tensile strength is not good, they tend to result in cartons in the compressive deformation of the test large, the final deformation, such as accordion-like, because as fiber texture, structure or fiber connectivity between the poor, and when the cardboard boxes for compression test, the first line of the edge of the fiber pressing force, which was unable to loose The fiber can not very well force the cartons are conveyed to the whole carton, but the pressure of local passive, with the partial collapse of the edge of collapse, mechanical parts and then gradually move toward the middle box on the form deformation phenomena such as the accordion-shaped test. And good tensile strength, then such a situation does not appear, the deformation is small cartons will withstand a lot of pressure situations, if coupled with code, can not afford a whole carton because of pressure from the tank surface center collapse .
Tightness, tightness test paper base paper in the production process of the pressure effect, the merits of tightness will affect the rate between the fiber node degree in turn affected the base paper of the ring crush strength and tensile strength, and ultimately Shadow to the compressive strength to the carton, and since the close of paper and insufficient, but also affect the moisture absorption of carton, carton making process in use or storage of excessive moisture absorption and reduce the carton itself Compression strength.
Burst strength is in the experimental conditions, the paper or cardboard in the unit area perpendicular to the specimen can withstand even the surface of the increase in maximum pressure. Burst strength reflects the process of moving boxes on the flow, handling, impact, tear strength endurance. More and more boxes are using client orders for the next resistance to breaking strength of the board made clear, we are required by the customer standard; projection of base paper to bursting, in general. Corrugated cardboard resistance breaking strength equal in paper, tissue paper, and sandwich paper bursting strength and multiplied by the coefficient of 0.92, with the corrugated core paper bursting strength has nothing to do. We can according to customer relations and so the standard introduction of paper burst back strongly to the development of paper grades and origin, and to develop appropriate acceptance criteria.
Determine the merits of not a single paper from a certain physical parameters to determine, the physical performance of the paper should be a comprehensive index. Sometimes use cardboard cartons businesses to cut corners in order to prevent customers in the carton compression, burst index, while the request, but also on the base paper with a proposed high weight requirements and carton business in order to meet customer requirements, only the increase in paper weight paper grades to ensure lower cost. Customers such a request has a low weight high strength corrugated paper shut out, in fact, come from the overall performance considering the low weight high strength corrugated base paper weight than the low end of the corrugated paper of high I am an expert from China Quality Digital, usually analyzes all kind of industries situation, such as bell tower hotel , hand coffee grinders.
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