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Home » Testing Solutions » By Material » Plastics » Tension » ISO 1798 Cellular Polymeric Materials

ISO 1798 Tensile Strength Flexible Cellular Polymeric Materials

Standard

  • ISO 1798
  • JIS K6400-5

Materials

  • Plastics

Business Sector

  • Aerospace and Suppliers
  • Consumer/Industrial Products
  • Automotive/Truck/Rail/Shipbuilding

Test Types

  • Tension

Specimen

  • Dumbbell
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ISO 1798 investigates the tensile strength and deformation properties of flexible cellular polymeric materials when extended at a constant rate of displacement until failure.

In principle, the test specimen is supported between two clamping jaws and fitted with an extensometer for a given gauge length. The specimen is pulled apart until the specimen fractures at a constant rate of displacement. The load and strain is recorded during the test, and is used for determine the tensile strength and elongation at break. To record the test it is important to have a high speed intelligent test data logging rate. This is the transfer rate to the PC of 100Hz or more to capture and record all the data.

For this test, we used pneumatic action grips with rubber coated jaw faces for clamping of the material fitted to a tensile testing machine. While manual action grips will work, many of our users prefer the pneumatic action grips for ease of use, productivity, and better repeatability. Pneumatic action grips allow you to set a clamping pressure, while the manually operated grips depend on the operator's strength (which may not be so repeatable). We find that gripping pressure and specimen alignment are very important in these tests. Too much gripping pressure can produce premature breaks, while not enough gripping pressure can lead to specimen slippage or breaks at or near the jaws. These grips are usually fitted to single-column or dual-column table-top design.

Two methods of strain measurement can be adopted. A contacting long travel extensometer is attached to the test specimen. This incorporate a mechanism suitable for determining the relative change in length of the appropriate part of the test specimen. Or a non-contacting video extensometer can be used as a viewing mechanism suitable for determining the relative change in length of the appropriate part of the test specimen.

We suggest using a materials testing software, such as Bluehill®, to input specimen details, set the desired test control, automatically calculate the desired results and statistics, and produce a test report all in accordance with the standard.

We suggest reviewing ISO 1798 to fully understand the test fixture and results requirements.

2630-080 Long Travel Extensometer

The Instron® model XL (long travel) extensometer is a precise device for measuring strain in highly extensible materials such as elastomers, semi-rigid plastics and films.

  • Products
  • 3/19/2007
  • 316.7 KB

2710-100 Series Screw Side-Action Grips

Screw side-action grips provide a very simple and efficient method for holding test specimens in a wide range of applications. The dual - acting design of 2710-100 series grips means that jaw faces can be adjusted to accommodate different specimen thicknesses. This ensures that the line of tensile force remains concentric with the grip body. They can be equipped with a selection of interchangeable grip jaw faces in various sizes and choice of surfaces including smooth ground, rubber-coated and serrated. Line contact and special coated faces are also available.The unique ‘snap-on’ jaw face attachment makes changing faces extremely quick and simple.

  • Products
  • 6/28/2017
  • 1.3 MB

Standard Video Extensometer (SVE)

The Instron Standard Video Extensometer(SVE)is a non-contacting extensometer that meets most testing standards for accuracy. The SVE can be used to measure axial strain in a wide variety of materials through failure and provides many advantages over traditional contacting extensometers.

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  • 11/22/2013
  • 169.4 KB

3300 Series - Affordable Testing Solutions

Instron 3300 Series Universal Testing Systems for Tensile, Compression, Bend, and other material property tests.

  • Products
  • 6/19/2017
  • 2.2 MB

5900 Series Premier Testing Systems Brochure

5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.

  • Products
  • 6/1/2017
  • 2.8 MB

Bluehill Universal Brochure

Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.

  • Products
  • 2/26/2017
  • 1.4 MB

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