The sponge indentation hardness test conforms to the standards and requirements of testing procedures.

Sponge indentation hardness test meets the requirements of the standard and test procedure

Complies with the standard:

GB/T 10802 Flexible polyurethane foam

GB/T 10807-2006 Determination of hardness of flexible foam polymer materials (indentation method)

GB/T 12825- 2003 Determination of the hardness of poroelastic polymer materials by concavity method

GB/T 18942.1-2003 Determination of stress characteristics -compressive deformation of polymeric poroelastic materials Part 1 Low density materials

ASTM D3574 Flexible porous materials — Test methods for panels, bonded and molded polyurethane foams

GBT 26392 -2011 Determination of recovery time of slow rebound foam

1. Main scope of application and functions

Mainly applicable to soft materials, aggregate materialsfoam such as: sponge, foam, etc. The indentation hardness is tested according to Method A, Method B, Method C and other testing conditions required by national standard. Testing concave hardness index, concave hardness characteristics, concave hardness inspection and compressive stresses of other materials.

2. Instrument introduction:

It is mainly composed of two parts: the test host and the control system. The instrument is controlled by a computer. It can automatically test data according to standard requirements throughout the process. All operations are performed in the software, making the test convenient and simple to use. It can quickly and accurately collect and process various data during the testing process, and can access, display and print.

Third, the instructions for using the software:

Pre-c degreeoncave:

Apply a force of 5N to the sample to measure the thickness of the sample and press it at a speed of 100MM/MIN Once the thickness of the sample is 70%, discharge at the same rate.

Method A – Determination of hardness index by indentation:

Proceed After three times of pre-pressure, dig the sample thickness by 40% and hold it for 30S, record the force value

Method B---Determination of bump hardness characteristics:

After three pre-pressures, hollow out the sample by 25% of the thickness and hold it for 30S , and record the force.Value

Increase the concavity from 25% of the concave sample thickness to 40% and keep it for 30S, record the force value

Increase the concavity from 40% of the concave sample thickness to 65% and keep it for 30S, recordenter the force value

Calculation of the concavity coefficient:

Force required for 25% concavity/Force required for 40% concavity

Required force for 65% concavity/Required force value for 40% concavity

Method C---determination of hardness test by concavity:

Three times After pre-concavity test, measure the instantaneous maximum value after pressing 40% of the sample thickness

Method D --- freely set the test method:

You can perform tests according to your own needs. This test method is defined according to foreign standards. For example, the following test is required: 5 compressions are required

1. For the first time, compress to 30% of the original thickness at a speed of 150mm/min, and return to the original state.

2. After a 5 second pause, compress to 40% of the thickness oforigin at a speed of 90 mm/min, and return to the initial state.

3. After a pause of 3 seconds, compress to 75% of the original thickness at a speed of 300mm/min, and return to the initial state.

4. After a pause of 1 second, compress to 50% of the original thickness at a speed of 75mm/min and return to the initial state.

5. After a pause of 2 seconds, compress to 40% of the original thickness at a speed of 50 mm/min, and return to the initial state.

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