Appendix II GB5034-85 "Corrugated Cardboard for Export Products Packaging"

National Standards of the People's Republic of China for export product packaging corrugated board UDC 676-76
:621-798 Corrugated fibre board for export products GB 5034-85

This standard applies to corrugated paperboard (hereinafter referred to as corrugated board) for the manufacture of corrugated paperboard boxes for export products.

1 Terminology
1.1 Corrugated cardboard is made of cardboard and corrugated paper processed into corrugated paper by corrugating rollers.
1.2 Single corrugated cardboard Corrugated cardboard made from two layers of cardboard and one layer of corrugated cardboard is shown in Figure 1.
1.3 Double corrugated cardboard Corrugated board made of two layers of linerboard, two layers of corrugated paper and a sandwich core, see Figure 2.

2 Technical requirements
2.1 Types In accordance with the physical strength of corrugated board, single corrugated cardboard and double corrugated cardboard are divided into four types, respectively, as shown in Table 1.
Table 1

Total surface weight of paper
g Waviness
Kgf/cm2 puncture strength
Kg-cm side pressure strength
Kgf/cm bond strength
Kgf/楞·10cm Moisture
% Single corrugated board 1 400 or less 8 50 4 6 11±3 2 401-500 12 65 5 6 3 500-640 16 85 6 6 4 641 or more 20 100 7 6 Double corrugated board 1 400 or less 12 90 6 6 11±3 2 401-500 16 105 7 6 3 500-640 20 125 8 6 4 641 or more 26 140 9 6

Note: 1 Moisture refers to the moisture content of corrugated board 30-60min after leaving the machine.
2 Table 1 does not include type B single corrugated cardboard and B/B double corrugated cardboard.
3 Each indicator is tested according to the method specified in Appendix A of this standard.
2.2 Materials
2.2.1 The linerboard used for processing corrugated cardboard must comply with the technical requirements in Table 2.
Table 2

Quantitative indicators, g/m2 180
±5% 200
±5% 220
±5% 250
±5% 280
±5% 300
±5% 320
±5% 360
±5% tightness, g/cm2 not less than 0.72 0.72 0.72 0.72 0.72 0.72 0.72 0.72 Durable endurance kgf/cm2 not less than 6 6.6 6.8 7 8 10 11 12 Folding resistance (lateral) not less than 80 120 400 420 500 Ring pressure Strength (lateral) kg not less than 21 24 26 28 31 33 35 40 Surface absorption weight, g/mw (positive/negative) not more than 30/60 30/60 30/60 30/60 30/60 Moisture, % 7-11 7-11 7-11 7-11 7-11 7-11 7-11 7-11

2.2.2 The corrugated base paper used for processing corrugated board must comply with the technical requirements in Table 3.
2.2.3 Processing corrugated cardboard using starch adhesive or other adhesive with the same adhesive effect shall not be