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Determination method for densification strain of cushion packaging material

A technology of buffer packaging and determination method, which is applied in the direction of analyzing materials, using stable tension/pressure testing material strength, measuring devices, etc. Changes in strain, etc.

Inactive Publication Date: 2018-12-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for determining the densification strain of the cushioning packaging material, which solves the problem that the existing method cannot accurately determine the densification strain of the cushioning packaging material and judge the strength of the cushioning and energy-absorbing properties of the cushioning packaging material

Method used

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  • Determination method for densification strain of cushion packaging material
  • Determination method for densification strain of cushion packaging material
  • Determination method for densification strain of cushion packaging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Determine a kind of method of regular hexagonal honeycomb paperboard densification strain, its specific steps are as follows:

[0061] Step 1. First, carry out constant temperature and humidity pretreatment on the material, set the temperature to 23°C, set the humidity to 65%, measure the thickness of the material to 40mm, and then use the universal material testing machine to conduct a static compression test on the material. According to the test Draw force-displacement curves as a result;

[0062] Step 2, convert the force-displacement curve of step 1 to obtain the stress-strain curve (see figure 2 ), the calculation formula of stress and strain is as follows:

[0063] σ=F / A×10 6

[0064] ε=X / T

[0065] In the formula, σ is the compressive stress, the unit is Pa; P is the compressive load, the unit is N; A is the bearing area of ​​the test sample, the unit is mm 2 .

[0066] ε is the compressive strain; X is the deformation, in mm; T is the original thickness ...

Embodiment 2

[0076] Determine a kind of method of C-type corrugated cardboard densification strain, its specific steps are as follows:

[0077] Step 1: First, carry out constant temperature and humidity pretreatment on the material, set the temperature to 23°C, set the humidity to 65%, measure the thickness of the material to be 25mm, and then use the universal material testing machine to conduct a static compression test on the material, according to the test Draw force-displacement curves as a result;

[0078] Step 2, convert the force-displacement curve of step 1 to obtain the stress-strain curve (see Figure 4 ), the calculation formula of stress and strain is as follows:

[0079] σ=F / A×10 6

[0080] ε=X / T

[0081] In the formula, σ is the compressive stress, the unit is Pa; P is the compressive load, the unit is N; A is the bearing area of ​​the test sample, the unit is mm 2 .

[0082] ε is the compressive strain; X is the deformation, in mm; T is the original thickness of the t...

Embodiment 3

[0092] Determine a kind of method of BC type corrugated cardboard densification strain, its specific steps are as follows:

[0093] Step 1: First, carry out constant temperature and humidity pretreatment on the material, set the temperature to 23°C, set the humidity to 65%, measure the thickness of the material to be 28mm, and then use the universal material testing machine to conduct a static compression test on the material, according to the test As a result, force-displacement curves are plotted,

[0094] Step 2, convert the force-displacement curve of step 1 to obtain the stress-strain curve (see Image 6 ), the calculation formula of stress and strain is as follows:

[0095] σ=F / A×10 6

[0096] ε=X / T

[0097] In the formula, σ is the compressive stress, the unit is Pa; P is the compressive load, the unit is N; A is the bearing area of ​​the test sample, the unit is mm 2 .

[0098] ε is the compressive strain; X is the deformation, in mm; T is the original thickness ...

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Abstract

The invention discloses a determination method for densification strain of a cushion packaging material, comprising the following steps: performing a static compression test on the cushion packaging material, drawing a force-displacement curve, then performing conversion according to the force-displacement curve, thus a stress-strain curve is obtained, calculating unit volume deformation energy ofeach point on the stress-strain curve and energy absorption efficiencies of the cushion packaging material, according to the energy absorption efficiencies corresponding to different stress values, determining the densification strain of the cushion packaging material, namely maximum strain before the material loses cushion characteristic, and then determining cushion energy absorption characteristic of the cushion packaging material.

Description

technical field [0001] The invention belongs to the technical field of cushioning performance of cushioning packaging materials, and in particular relates to a method for determining the densification strain of cushioning packaging materials. Background technique [0002] Products go through a series of transportation, storage, stacking and loading and unloading processes from production to use, and finally put them in a certain environment. The product will be strongly acted on the product from production to use, and cause the product to undergo mechanical deformation. In order to prevent the product from being damaged, it is necessary to try to reduce the impact of the external force. The product is wrapped with a cushioning packaging material, which can effectively slow down The contents are exposed to shock and vibration, protecting them from damage. [0003] Cushioning packaging materials, also known as shockproof packaging materials, are characterized by light weight,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019G01N2203/0075
Inventor 孙德强郝静李靖靖李耿邢月卿李国志
Owner SHAANXI UNIV OF SCI & TECH
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