How to Perform Foam Compression Tests According to JIS K 6400

Foam compression testing is essential for assessing the durability and performance of polyurethane foams used in mattresses, furniture, and automotive seating. The JIS K 6400 standard outlines the procedures for conducting these tests. This blog provides a step-by-step guide on performing foam compression tests using IDM Instruments' advanced equipment.

Overview of JIS K 6400

JIS K 6400 specifies test methods for flexible polyurethane foam, focusing on evaluating the foam's softness and load-bearing capacity through Indentation Load Deflection (ILD) and Indentation Force Deflection (IFD) tests.

Test Setup

  1. Equipment Required

    • Foam Compression Tester: IDM's Foam Compression Tester is ideal for conducting ILD and IFD tests, providing accurate and reliable results.
    • Sample Preparation: Cut the foam samples to the specified dimensions, ensuring uniformity for consistent results.
  2. Test Procedure

    • Entering System Settings: Configure the test parameters, including sample size, test type, and standard references, using IDM's software interface.
    • Conducting the Test: Mount the test sample and start the automated test. The system measures the force required to compress the foam to 25% and 65% of its original thickness.
    • Data Analysis: The results are displayed in real-time, and the software provides a detailed graphical representation of the load-deflection curve.

IDM Instruments Product Highlight: Foam Compression Tester

  • Features:

    • Loading System: Utilizes a closed-loop microcomputer to drive a ball screw and nut for vertical movement.
    • Load Cell: Ranges from 0-2224N with auto-zeroing and overload protection.
    • Test Area: 500mm wide, not restricted at the front and rear, with a 322 ± 2cm² circular indentor foot.
    • Software: Windows-based, allowing for real-time graphic display of data, statistical analysis, and printable reports. The software supports data sampling rates from 1-200,000Hz and allows for position or load control.
    • Optional Items: Swivel and fixed platens, custom platen fixtures, and larger capacity load cells.
  • Applications:

    • Flexible cellular polyurethane
    • Car seats
    • Bike seats
    • Mattresses
    • Furniture and chairs
  • Standards:

    • AS 2281 and AS 2282.8
    • ASTM D3574, ISO 3386:1984, and JIS K 6400


Conducting foam compression tests according to JIS K 6400 ensures that polyurethane foams meet international quality standards, enhancing product durability and performance. IDM Instruments' Foam Compression Tester offers advanced features and ease of use, making it an essential tool for manufacturers in the foam industry.

Keywords: JIS K 6400, foam compression test, polyurethane foam, indentation force deflection, foam durability, quality control, mattress testing.


Related Testing Instruments


Foam Compression Tester

Foam Compression Tester

The Foam Compression Tester uses deflection force on the flexible cellular polyurethane. This instrument allows performing the ILD or IFD of flexible cellular polyurethane. Which is a common test as per ASTM, ISO, AS, BS international standards including ASTM D3574. This instrument offers a variety of software features that allow the programming of many parameters. This is because it uses our Universal Tester program. This software package allows the operator to conduct a large range of tests...
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