Rubber durometer hardness

Rubber Specific gravity Durometer hardness (or Shore) Ultimate elongation % (23°C) Tensile strength, lb in 2 (23°C) Service temperature, °C ... [Pg.1067]

Recommended Practice for Scleroscopic Hardness Testing of Metallic Materials Test Method for Rubber Property International Hardness Test Method for Rubber Property Durometer Hardness... [Pg.463]

International Rubber Hardness. The International mbber hardness test (ASTM D1415) (2) for elastomers is similar to the Rockwell test ia that the measured property is the difference ia penetration of a standard steel ball between minor and major loads. The viscoelastic properties of elastomers require that a load appHcation time, usually 30 seconds, be a part of the test procedure. The hardness number is read directly on a scale of 0 to 100 upon return to the minor load. International mbber hardness numbers are often considered equivalent to Durometer hardness numbers but differences ia iadenters, loads, and test time preclude such a relationship. [Pg.467]

Durometer hardness - A value that indicates the indentation or resistance to indentation of the indentor point of a durometer. High values indicate harder materials. See ASTM D2280-Test Method for Rubber Property-durometer Hardness. [Pg.266]

Durometer Test Method for Rubber Property Durometer Hardness D2240... [Pg.463]

For many years there was no move to produce an international standard for durometers but one was eventually published in 1986. ISO 7619 is now in two parts44,45, separating a meter calibrated in IRHD from the others. Part 1 now covers the Shore A and D type meters, a meter designated AO for soft materials and a micro Shore type meter designated AM. The Shore A scale corresponds approximately to the IRHD scale and the D scale can conveniently be used for hard rubbers above about 90 Shore A. The AO meter is suitable for rubbers less than 20 Shore A, whilst the AM meter covers the normal Shore A range. As expected from its name, the meter in Part 2 of the standard covers the IRHD range. [Pg.128]

Standard test method for rubber property Durometer hardness Shore A and Shore D hardness testing of rubber Physical testing of rubber Part A57... [Pg.166]

Test method for indentation hardness of rubbers, international hardness Test for Durometer hardness of rubbers... [Pg.305]

Durometer hardness is measured on tests specimens that meet specific standards for shape and thickness. Durometer hardness is usually measured using the Shore A scale, which measures relative hardness on a scale of 0 to 100 units. Most rubber components for medical use are found in the 35-60 range with 40-50 typical for rubber vial stoppers. Durometer Hardness may be measured on some actual components if they have a sufficiently large flat surface and thickness, i.e., 28-32 mm IV stoppers. [Pg.1474]

Standard Test Method for Rubber Properties Durometer Hardness, ASTM D2240-97el, ASTM West Consho-hocken, PA, 1999. [Pg.1481]

ASTM D 2240-86 Standard Test Method for Rubber Property — Durometer Hardness, 5 pp (DOD Adopted) (FSC 9320) (MR) (Comm D-11)... [Pg.411]

Natural rubbers, such as pure gum with a durometer hardness of 40 on the Shore A scale, display surprising long life in sliding abrasion. Such linings are used in sand and slurry handling pumps and pipings where particles are in fine size and no grit is present. [Pg.34]

Since the flow causes sliding abrasion at a low angle of incidence in the piping, the rubber which can be suggested for this application is a low durometer hardness (40 on the Shore A scale) natural rubber. For lower flow rates at ranges of 1,200 litres per minute up to 4,000 litres per minute, a hard rubber or a semi-ebonite rubber can be used since the abrasive wear of the finely meshed particles will be negligible. [Pg.34]

The standard test method for measuring the durometer hardness of rubbers according to ASTM D2240-05 [6] is based on the penetration of a specified indentor forced into the material under specified conditions. The indentation hardness is inversely related to the penetration and is dependent on the elastic modulus and viscoelastic behaviour of the material. This method is an empirical test intended primarily for control purposes. No simple relationship exists between indentation hardness determined by this method and any fundamental property of the material tested. [Pg.123]

D 2240 Standard Test Method for Rubber Property—Durometer Hardness... [Pg.195]

The hardness measured with the small pocket type of hardness meter is associated with the durometer tests. Although there is not an international standard [1] that covers durometers, there is one for plastics, ISO R868 [10], which was used [9]. The two durometers specified are the Shore A and D which are also described in ASTM D2240 [11] where they are intended to cover both rubbers and plastics. The A scale corresponds approximately to the IRHD (International Rubber Hardness Degrees) scale and the D scale can be conveniently be used for hard rubbers above about 90 IRHD. [Pg.139]

The Shore A scale, or as it is sometimes called, durometer hardness, enjoys considerable success in North America and in particular is widely accepted by the automotive industry the scale is an integral part of the classification system for elastomeric materials used in automotive applications (ASTM D2000). Shore hardness has also become the industry standard for the rapidly growing thermoplastic rubber sector, where advantage can be taken of the complementary Shore D scale for harder grades and for rubber-modified plastics. Seven Shore scales are described in ASTM D2240, while Shore A and D hardness are also detailed in the international standard for pocket hardness meters. ISO 7619 (BS903. Part A57). The latter also specifies a pocket meter based on the IRHD scale. [Pg.288]

ASTM D2240, Rubber property—Durometer hardness. 1995. [Pg.367]

Standard test method for rubber property - Durometer hardness... [Pg.434]

The Lambda series of Medicaflex is a polyurethane-based TPE polymer that exhibits low modulus characteristics with high tear strength and abrasion resistance. Those listed in the tables have passed USP Class VI compatibility tests and have been used as replacements in some natural rubber latex and silicone rubber applications. The polymer has been applied to uses such as catheters, tubing and films where softness, low durometer hardness, low modulus or high elongation are needed (Tables 4.3, 4.12, and 4.13). [Pg.313]

D 1790 Test method for Brittleness Temperature of Plastic Film by Impact D 1938 Test method for Tear Propagation Resistance of Plastic Film and Thin Sheeting by a Single-Tear Method D 2240 Test Method for Rubber Property - Durometer Hardness D 2702 Standard Practice for Rubber Chemicals - Determination of Infrared Absorption Characteristics... [Pg.337]

Hardness D2240 Rubber property—durometer hardness 9.01... [Pg.222]

Liquid silicone rubbers (LSRs) are two-part grades which can be coinjection-molded with thermoplastics to make door locks and flaps for vents.1 LSRs can be biocompatible and have low compression set, low durometer hardness, and excellent adhesion. One-part silicones are cured by ambient moisture. They are used for adhesives and sealants with plastic, metal, glass, ceramic, and silicone mbber substrates. A solventless, clear silicone/PC has been developed which requires no mixing, and can be applied without a primer. ... [Pg.236]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...