Assess whether the carton meets the standard - anti-pressure and stacking test (1)

With the development of industry, corrugated cartons have been widely used as packaging materials. Due to the low threshold of the corrugated paper box industry, the competition is extremely fierce. Carton users have exposed more or less quality problems in the use of cartons, such as the collapse, cracking, etc., of cartons after stacking, causing many negative effects.

Therefore, more and more carton users have realized the dual significance of packaging for product protection and product image promotion.

Carton users are more professional and rational in determining product quality standards; for example, adding key test indicators for test equipment to evaluate carton boxes, including breaking resistance and pressure resistance (or stacking), and whether comprehensive research is over-packaging (excess material design) ), to achieve the optimal contribution of the design of packaging materials in the entire product manufacturing cost.

In the process of product inspection, when the carton user evaluates whether the product is qualified or not, it often produces a deviation in understanding and misjudging the product test results. The following is a detailed analysis and discussion on how to correctly understand and evaluate the anti-stress and stacking test of corrugated boxes, and share personal practical experience with carton enterprises and users.

Carton anti-pressure, stacking test compliance with the requirements must be clear two standards: test status standards, physical indicators.

Inspection status analysis

The packaging industry usually adopts the following inspection status of two packaging materials:

Carton sample temperature and humidity were (23 ± 2) °C, (50 ± 5)%, pretreatment 24h.

Standard Source: SN 丌 02693-93 "Procedures for Inspection of Corrugated Paper Containers for Export Goods Packaging".

Test paper pulp, paper and paperboard standard; helium atmosphere should be relative humidity (50 ± 2)%, temperature (23 ± 1) °C general paper pretreatment 4h, tissue paper at least 5h ~ 8h, high ration or other paper species At least 48h or longer.

Standard source: GB 丌 10739-1989 "Standard atmosphere for processing and testing of pulp, paper and paperboard samples"

The purpose of setting the pretreatment of the carton test is to make the fibrous tissue structure of each sample in a balanced and stable state, so as not to make the difference in test results too large and affect the determination of the mechanical properties of the carton.

Discussion on Safety Anti-pressure and Stacking Test

Conceptual expression

Pressure resistance is the maximum compressive yield value achieved by the carton against continuous and uniform pressure.
The stacking code (standard name—static load stacking code) is to apply a constant mass to the carton package within a certain period of time (usually 24h), and the amount of deformation and damage caused by the carton is in compliance with the requirements.

We can intuitively understand the difference between them by testing the force time diagram:

(to be continued)