North American to Asian Standards Conversion Continued

This post started with Steve looking for a chart that would compare Asian corrugated to those specified her in the USA. You can read the first part of this discussion by clicking here.

Steve has provided more information regarding his request.

I am interested primarily in compression strength equivalents for use in RSCs. We are building electronics products that weigh up to 30 lbs. with cartons that are in the range of 25 x 26 x 23 inches. I do not have any samples presently. The only information that I have uncovered so far is shown in the attached table.

Our supplier has proposed a double wall carton consisting of 250 kraft liner and K3 + K3 flutes. It would be very helpful if you could calculate the compression strength of this design as compared with the closest US std.

China K3 - K9 specifications

China K3 – K9 specifications

Thank you for including the chart Steve. In the past, flute profiles were rather standard in geometry and number of flutes per foot. That is not the case today. The K9 design comes very close to an ‘E’ flute profile and the K3 comes close to the new to the US ‘D’ flute profile. ‘D’ bridges the area between ‘E’ and ‘B’ flutes. The 175 g/m2 liner is our 38# and the 145 g/m2 fluting is our 30# medium. The US compression strength values are much higher than they would be in China given the same weight of containerboards.

Yes, double wall board is very popular in China. The combined board design is an A/B flute structure utilizing 38# liners and 30# mediums. In the US, given the dimension of the carton you provided (25 x26 x23 inches), one could expect 1975 to 2250 pounds of top-to-bottom compression potential per carton. The Edge Crush Test values would range from 63 pli to 72 pli.

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