Book Test

Rubber and flexible Thermoplastic materials

  • Hardness (Durometer) (ASTM D 2240)
  • Tensile, Elongation and Modulus Properties (ASTM D 412)
  • Tear Resistance (ASTM D 624)
  • Compression Set Method B (ASTM D 395)
  • Compression Deflection (ASTM D 575)
  • Accelerated ageing tests –Heat ageing (ASTM D 573)
  • Oil Resistance of Rubber (ASTM D 471)
  • Water Resistance of Rubber( ASTM D 471)
  • Fuel / Chemical Resistance of Rubber (ASTM D 471)
  • Adhesion to a Flexible Substrate (ASTM D 413)
  • Adhesion to a Rigid Substrate (ASTM D 429)
  • Abrasion Resistance (Rotary Drum Abrader) (ASTM D5963)
  • Crack growth – De mattia (ASTM D813,ASTM D430)
  • Rebound Resilience – Vertical ( ASTM D2632)
  • Ozone Cracking – Static (ASTM1149)
  • Ozone Cracking Outdoors (ASTMd1171)
  • Ozone Cracking – Dynamic (ASTM D3395)
  • Low Temperature testing
  • Surface and volume Resistivity of insulating materials (ASTM D257)
  • Volume Resistivity of Electrically conductive and antista

Hardness (Durometer) (ASTM D 2240) :

Determination of indentation hardness can be done for substances classified as vulcanized (thermoset) rubber, thermoplastic elastomers, cellular materials, elastomeric materials, gel-like materials, and some plastics. Durometer scale is a type of measurement of rubber material’s hardness. Generally most rubber materials fall under the Scale Shore A whereas Hard rubber and plastics use Shore D. Hardness of other materials such as Foams and soft sponges are judged using scales Shore O, OO and by scale Asker C.

Tensile, Elongation and Modulus Properties ASTM D 412-98a-e1 OK :

Behaviour of rubber material when a tensile force is applied is determined. Test is performed to evaluate the tensile properties rubber materials, such as Tensile strength, Elongation at break and Modulus. Different test specimens can be used for the test as per various international standards. Tensile related properties are also evaluated for the products under conditions. MAEON lab is equipped with state of the art instrument to determine the required stress-strain properties.

Tear Resistance ASTM D 624-00e1 :

Testing for the property of tear resistance of thermoplastic elastomers and conventional vulcanized thermoset rubber are performed in MAEON lab using different shapes of specimens as per the standard chosen

Compression Set ASTM D 395-03 :

The compression set taking place under constant stress / strain in media / air is evaluated. The test is intended to measure the ability of rubber to retain elastic properties after prolonged compressive stress

Compression Set at Low Temperature (ASTM D 1229 ) :

The test determine the compression-deflection characteristics of rubber material other than those usually classified as sponge rubber and hard rubber.

Compression Deflection ASTM D 575-91 :

he test determine the compression-deflection characteristics of rubber material other than those usually classified as sponge rubber and hard rubber.

ACCELERATED AGEING TESTS ASTM D 573-04 ASTM D895 :

Polymer, Plastics and Rubber, undergo changes both Physical and chemical – MAEON lab can conduct tests to quantify the property changes during the ageing tests under Heat, Oxygent, fuel, oils, chemicals etc.

Fuel / Chemical Resistance of Rubber ASTM D 471-98e2 :

Rubber products are used under exposure to Chemicals, Oils, Greases, Fuels and othe fluids. The Rubber material undergo deterioration on contact with these substances. The effect of such contact on physical properties can be evaluated.

Adhesion to a Flexible Substrate (ASTM D 413) :

The test method is used to determine the adhesion strength between plies of fabric bonded with rubber or the adhesion of the rubber layer in items made from rubber, and attached to other material.

Adhesion to a Rigid Substrate ASTM D 429-03 :

Determination of Adhesive strength of rubber to rigid materials, such as Metal, Plastics. Different Standard test samples are prepared for Adhesion test, based on each application as per product application.

Abrasion Resistance (Rotary Drum Abrader) ASTM D5963-04 :

This test measures the abrasion resistance of rubbers and thermoplastic elastomers during the performance under abrasive condition. The method involves moving a specimen across the surface of a rotating drum with an abrasive sheet.

Crack growth – De mattia (ASTM D813 - ASTM D430) :

The evaluation of crack growth of vulcanized rubber when exposed to repetitive flexing is done by this test. The deterioration on Dynamic Fatigue can also be performed. These tests are performed either at room temperature and also at elevated temperatures

Rebound Resilience – Vertical ( ASTM D2632 - …) :

he property of Resilience of rubber is a function of its dynamic modulus and internal friction. The test can be performed to determine the impact resiliene of solid rubber by measurement of vertical rebound of a standard dropped mass.

Ozone Cracking – Static (ASTM1149) :

Deterioration of rubber properties occur when exposed to Ozone atmosphere. The resistance of rubber to specific ozone concentration is determined under a specific tensile strain and temperature.

Ozone Cracking Outdoors(ASTM1171) :

This test estimates the resistance of Rubber products to the effects of ozone cracking and outdoor weathering. The test can be performed moulded or extrude soft rubber materials and sponge rubber such as weatherstrips etc.

Ozone Cracking – Dynamic (ASTM D3395) :

The determination of resistance to cracking of rubber products when exposed to ozone under dynamic strain condition is measured.

Low Temperature Resistance (ASTM D 2137) :

Polymeric materials get hard and brittle when subjected to low temperatures. Evaluations of characters on low temperatures are carried out at Maeon lab.

Surface and Volume Resistivity of insulating materials (ASTM D 257) :

Surface resistivity is the resistance to leakage current along the surface of an insulating material. Volume resistivity is the resistance to lakage current through the body of an insulting material. Measurement of these resistance characters can be performed at MAEON lab.

Volume Resistivity of Electrically conductive and antistatic products (ASTM D 991 ..) :

This test metod utilizes the measurement of current flow through a material and the voltage drop across a section of the material to calculate the volume resistivity

Identification of Rubber and Rubber chemicals by Infrared Spectrophotometry ASTM D3677-10 ASTM D2702-05 :

The polymer contained in a cured and uncured compounds can be determined by Infrared spectrophotometry. Infrared Spectrum is also used for Chemicals to identify an unknown material within a group of Rubber/Plastic chemicals. The infrared spectrum of the test specimen is superimposed on a reference spectrum and compared if the two are identical or not.

Melting Point – Rubber Chemicals ASTM D1519:

Melting point is determined for rubber processing chemicals for verifying quality of material. Melting point values which are deviating from known standard substance indicate poor quality.

Testing of Flexible Cellular Materials - Latex Foam D1055-04 :

Latex foam material / products can be evaluated for its properties on air ageing, compression deflection, load deflection, flexing, low temperature properties, static fatigue etc...

Testing of Flexible Cellular Materials - Latex Foam D1055-04 :

Latex foam material / products can be evaluated for its properties on air ageing, compression deflection, load deflection, flexing, low temperature properties, static fatigue etc...

Testing of Flexible Cellular Materials - Sponge or Expanded Rubber ASTM D1056-00 :

Sponge rubber and expanded rubber products can be evauated for its properties. Some of the properties tested are Compression deflection, heat resistance, fluid resistance, compression set, water absorption, ozone resistance etc.

Analysis of Rubber compounds ( ASTM D 297) :

Rubber products and compounds are analysed for type of polymer and quantity of polymer. dualitative and quantitative determination of nonrubber constituents are carried and some of the tests carried out are listed:

  • Type of Rubber Polymer
  • Rubber Polymer % Carbon Black %
  • Acetone Extract %
  • Waxy hydrocarbon
  • Mineral oil
  • Chloroform extract
  • Fillers – inorganic
  • Free sulphur
  • Combined sulphur
  • Total sulphur
  • Slilicon dioxide
  • Calcium oxide
  • Zinc oxide

Thermogravimetric analysis (TGA) ASTM D6370-99 (2014):

The composition of compound of rubber / plastics such s Low boiling fractions, polymer, carbon and fillers are quantitatively determined by TGA – Thermogravimetry. A small mass of test sample is subjected to controlled heating under specific environment and the mass loss over a temperature range is measured.

Determination of Tg by DSC technique (ASTM D7426-08(2013) :

The Glass transition - temperature of materials is determined by DSC Procedure. The changes in the heat flow when samples is heated / cooled at controlled rate through the glass transition region is analzed to provide the Tg temperature. Other measurements from DSC include Specifc Heat, Crystallation temperature, Thermal stability, Decompostion temperature, Oxidative Induction Times etc…

Determination of IRHD of rubber (ASTM D3418-15) :

IRHD International Rubber Hardness Degrees – Like Shore Scale - is a measure of Hardness of elastomeric materials. In this method, a spherical indentor, indents the sample under a minor and major load. The differential indentation depth is measured and reported directly in IRHD UNITS. IRHD-Micro is used for measuring specimens of lower thickness.

Testing for Dielectric Breakdown voltage and Dielectric Strength (ASTM D149-09(2013) :

Maeon labs has facility for determining Dielectric properties of insulating materials plastic composites and elastomer compounds used commercially for insulation purposes. Sheets, extrusions, coatings, hoses and cellular materials can be tested for this parameter.

UV weatherability test for rubber: (ASTM D750-12, ASTM D1148-13) :

Rubber articles deteriorate on weathering, to accelerate the effects produced by light, heat and moisture in the natural environment, a UV source with heat and moisture weatherometer is used. After the specified period of exposure the rubber article is examined for property changes.

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