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GB/T 45456-2025Packaging — Determination of crease stiffness for folding cartons (English PDF)

包装折叠纸盒折痕挺度的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 28, 2025

Implementation date

March 28, 2025

Scope

GB/T 45456-2025 is the English-translated version of 包装折叠纸盒折痕挺度的测定.

GB/T 45456-2025 is the Chinese national standard covering how stiff the fold line of a folding carton is — the principle of bending the board through 90 degrees about the crease and reading the force at the knife edge, the chuck and the force measuring device, the conditioning and the specimens cut in each direction, the calculation and the precision, and a figure that decides whether a blank folds square on the packing line or springs back open. First edition, in force from 28 March 2025. Issued on 28 March 2025, it has been in force since 28 March 2025.

Document preview — GB/T 45456-2025

National Standard of the People's Republic of China

ICS: 55.040
Classification: A 83

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope5
2 Normative references5
3 Terms and definitions5
4 Principle6
5 Instruments6
6 Specimen preparation7
7 Test steps8
8 Calculation and result presentation8
9 Precision9
10 Test report9
References10

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by and is under the jurisdiction of the National Technical Committee on Packaging of Standardization Administration of China (SAC/TC49).

Drafting organizations of this document. Tianjin University of Science and Technology, MYS Group Co., Ltd., Ningxia Herui and Swiss Packaging Co., Ltd., Huayuan New Materials Stock Co., Ltd., Zhejiang Great Shengda Packaging Co., Ltd., Gansu Tobacco Industrial Co., Ltd., Guizhou Guotai Digital-Intelligence Liquor Group Co., Ltd., Suzhou Tongli Printing Co., Ltd., Guangdong Zhuangli Color Printing Co., Ltd., Ma'anshan Huiyuan Printing and Packaging Technology Co., Ltd., Tianjin A&R Intelligent Packaging Technology Co., Ltd., Zhengzhou Tianbao Packaging and Decoration Industrial Co., Ltd., Wenzhou Fujie Polytron Technologies Co., Ltd., Nanning Juncheng Packing Co., Ltd., Hangzhou Pinxiang Technology Co., Ltd., Dongguan Qinda Equipment Co., Ltd., Tianjin Zhongrong Intelligent Packaging Co., Ltd., China Packaging Research and Test Center, Hangzhou Quality and Metrology Science Research Institute, Huizhou Degang Machinery Co., Ltd., Tengzhou Dasheng Packaging Products Co., Ltd., Henan Jinmangguo Printing Co., Ltd., Henan Yuhong New Environmental Protection Packaging Co., Ltd., Ningbo Changya Newmaterial Technology Co., Ltd., Wuhan Yincaitian Paper Co., Ltd., Dezhou Chunxiang Packaging Products Co., Ltd., Shenzhen Baixinglong Creative Packaging Co., Ltd., Shandong Xinlin Paper Products Co., Ltd., Dalian Jianfeng Printing Co., Ltd., Sichuan Yibin Wuliangye Jingmei Printing Business Co., Ltd., Jinan Quanhua Packing Products Co., Ltd., Zhejiang Xinya Packaging Co., Ltd., Guizhou Renhuai Shenren Packaging Printing Co., Ltd., Zhejiang Yixing Packaging Technology Co., Ltd., Hubei Hejia Packaging Technology Co., Ltd., Dongguan KWG Colour Printing Co., Ltd., Yunnan Qiaotong Package Printing Co., Ltd., Hubei Huagong Image Technology Development Co., Ltd., Yamagata Printing (Wuxi) Co., Ltd., Shaanxi Yanyin Packaging Technology Co., Ltd., Guangdong Taijin Intelligent Packaging Co., Ltd., Jiangsu Jinjia New Packaging Material Co., Ltd., Guangdong Runheng Technology Co., Ltd., Shaanxi Jinye Printing Co., Ltd., Jiuguochun Wuhan Packaging Technology Co., Ltd., Hangzhou Pintoo Electronic Technology Co., Ltd., Zhejiang Dahong Packaging Technology Co., Ltd., Senkoo (Shanghai) Brand Planning Co., Ltd., Jiangsu Zhonglisheng Packaging Technology Co., Ltd.

Main drafters of this document. Wang Yufeng, Liu Huifeng, Guan Damin, Song Haiyan, Huang Xuankai, Sun Junjun, Xie Siqi, Li Lanhui, Li Xue, Fan Yu, Zhang Jiandong, Liu Packaging - Determination of crease stiffness for folding cartons

1 Scope

This document describes the method for determining the crease stiffness for folding cartons.

This document is applicable to the design, production and inspection of folding cartons.

It can be used as a reference for other folding paper packaging products.

2 Normative references

GB/T 450

GB/T 10739

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Folding carton

The cardboard is die-cut, creased, and bonded to be folded into sheets, and can be formed into a cardboard box when used.

[Source. GB/T 34053.6-2017, 3.1, modified].

3.2 Crease stiffness

The ability to resist bending and deformation, which is generated by bending the cardboard at a certain angle along the crease line toward the forming direction.

5.2 Crease stiffness tester

5.2.1 Chuck

The width is not less than 38 mm, the depth is (22.0±0.2) mm, and it can be adjusted in the direction perpendicular to the plane of the specimen. In the initial position, the chuck fixes the specimen in the vertical plane, and the chuck shall be able to rotate (90.0±0.5)° around the rotation axis (crease line).

5.2.2 Force measuring knife edge

The length of the force-measuring knife edge shall not be less than 39 mm and shall be parallel to the rotation axis of the chuck and (10.0±0.1) mm away from the rotation axis.

5.2.3 Force measuring device

The accuracy of the force sensor is ±1%.

6 Specimen preparation

6.1 Sampling

When the test is used to evaluate a batch of samples, sampling shall be carried out in accordance with the provisions of GB/T 450.When the test is used to evaluate other types of samples, the samples taken shall be representative.

6.2 Temperature and humidity treatment and test environment

The specimens shall be subjected to temperature and humidity treatment under the environmental conditions specified in GB/T 10739, and the specimen preparation and testing shall be carried out under these conditions.

6.3 Sample cutting

Cut the specimens with a sampler, the dimensions are shown in Figure 2.The width of the specimen is (38.0±0.2) mm, the length is not less than 36.0 mm, and the distance from the center of the crease line to a cutting edge is (25.0±0.2) mm. Cut at least 10 specimens in each direction to be tested. The specimens shall be free of damage and have straight and smooth edges. The specimens shall not be bent before testing. ......

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 450 · GB/T 10739

Editions of GB/T 45456

Edition	Title	Revision	Status
GB/T 45456-2025	Packaging - Determination of crease stiffness for folding cartons	current edition	Current

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