Appendix XIV GB13024-91 "Cardboard Board"

1 Theme content and scope of application This standard specifies the technical specifications of the boxboard.
This standard applies to the manufacture of corrugated board cardboard.
2 Quoting standard GB450 paper and paperboard pattern taking GB451.1 Determination of paper and board size and skewness GB451.2 Determination of paper and paperboard quantitative method GB451.3 Determination of paper and board thickness GB462 paper and paperboard moisture Test Method for Determination of Folding Resistance of GB1538 Paper (Shaughel Tester)
Determination of GB1539 paperboard's bursting degree GB 1540 Determination of paper's water resistance
GB2679.5 Determination of the degree of folding resistance of paper and paperboard (MIT foldability tester)
GB2679.8 Determination of cardboard ring pressure GB2828 batch inspection sampling sampling procedures and sampling tables (applicable to continuous batch inspection)
GB10342 Paper Packaging and Marking GB10739 Standard atmosphere for sample processing and testing of pulp, paper and paperboard
3 Product Categories
3.1 Boxboards are divided into five grades A, B, C, D, and E according to the quality, of which A, B, and C are linerboards.
Class A: Export corrugated cardboard suitable for the manufacture of fine, valuable and refrigerated goods packaging.
Class B: Suitable for manufacturing corrugated cardboard for export goods packaging.
Class C: Corrugated cardboard suitable for making larger articles.
Grade D: Suitable for manufacturing corrugated cardboard for general goods packaging.
Grade E: Suitable for manufacturing light load corrugated cardboard.
3.2 Cardboard size Flat paper is 787mm × 1092mm, 960mm × 1060mm, 960mm × 880mm, its size deviation must not exceed ± 5mm, skewness does not exceed 5. Web width is 960, 1100, 1600, 1940mm, deviation is not allowed to exceed ± 80mm.
Other sizes can be specified in the order contract.
4 Technical requirements
4.1 The technical specifications of the boxboard shall comply with the requirements in Table 1.
4.2 The cardboard does not allow delamination due to external forces.
4.3 The color of each batch of cardboard should be basically the same, and there should be no exposed bottom.
4.4 The surface of the board should be flat and no visible blankets are allowed.
4.5 Paperboard must not be subject to paper sickness such as creases, tears, or holes.
4.6 Flat paper is not allowed to have more than 2cm in diameter wetted, wet paper web per 10m2, diameter greater than 3cm: no more than one A, B grade, C grade must not exceed two, D grade must not exceed three, Class E must not exceed five.
4.7 The core of the web must not be worn. Three paper breaks per roll are forbidden, and adhesive tape is firmly stuck at the breakage.
4.8 The cut edge of the flat sheet should be neat and clean, with no edges, no corners, thin edges, etc. The end face of the web should be flat and the zigzag or concave-convex surface formed must not exceed 5mm.
4.9 does not meet the requirements of Table 1, one of the following conditions can be classified as second-class products:
4.9.1 Quantification exceeds the permitted tolerance of the specified 2%;
4.9.2 Those with a Burst Resistance Index less than the specified 10%;
4.9.3 The lateral loop pressure index is less than the specified 10%;
4.9.4 Those with a horizontal folding endurance less than the specified 20%;
4.9.5 The absorbent is greater than the specified 20% or less;
Table 1

Note: For the quantification specified in this table, the physical performance is assessed by the insert method according to the nearest grade.
4.9.6 Web connector exceeds requirements: more than one grade A and B, more than two grades C, D, E.
5 test methods
5.1 Quantitative, tightness: Determined according to GB451 regulations.
5.2 Burst resistance index: Burst resistance is measured in accordance with the provisions of GB1539 and converted into a burst resistance index.
5.3 Transverse Cylinder Pressure Index: The transverse crush pressure intensity shall be in accordance with the provisions of GB 2679.8, and shall be converted into a lateral crush pressure index.
5.4 Horizontal folding resistance: In accordance with the provisions of GB 2679.5, if the folding endurance is less than 10 times, it can be measured in accordance with the provisions of GB 1538.
5.5 Water Absorption: Measured in accordance with the provisions of GB1540, soaking time is 2min.
5.6 Moisture: Determined in accordance with the provisions of GB462.
6 Inspection Rules
6.1 Take one delivery but not more than 50t.
6.2 The manufacturer shall ensure that the board produced complies with the requirements of this standard. Each paper shall be accompanied by a certificate of conformity upon delivery.
6.3 product delivery inspection, sampling inspection according to GB2828 regulations, the sample unit is reel or order (piece).
6.4 Samples taken and tested before the test in accordance with the provisions of GB450 and GB10739 conduct.
6.5 Qualified Quality Level (AQL) Based on the rate of nonconforming product, the count sampling plan shall be as specified in Table 2.
Table 2

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