Elmendorf tear

Internal tear was performed on an Elmendorf tear tester having a 200 g capacity. A single ply was used unless the tear strength deteriorated considerably necessitating three or four piles In order to obtain a reading In the range suggested for the Instrument. 

ASTM D1922, usually known as the Elmendorf tear strength (related to test originally devised for paper and board), is carried out in the machine (MD) and cross (CD) direction of the material. Measured as kN/m. Test D689-44 also applies for films. 

Tear strength Elmendorf tear test ASTM D 5734... 

Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method, Elmendorf Tear. Primary Film Test Method ASTM D1922. Tear strength is the force necessary to eontinue tearing a sample after a nick has been made it is reported in grams. 

Elmendorf Tear testing can be performed on three types of standard samples however, the constant radius sample is the preferred test sample for plastic films. (See Fig. 2.) This sample provides a constant radius from the start of the tear strength measurement—useful for materials where the tear may not propagate directly up the sample as in-tended.f ]... 

In tests of 20-mil films blown from comparable melt index pol)miers, Dow Primacor copolymers showed clearly superior Elmendorf tear strength over EVA, and up to ten times the tear strength of the ionomer. In cast films, Dow Primacor copolymers can even offer more balanced tear strength than comparable linear low material... 

Elmendorf Tear A measurement of the tear resistance of sheet materials including paper, packaging, foils, textiles, non-wovens, and plastic films. 

JIS P-8116 Paper — determination of tearing resistance —Elmendorf tearing tester method. 

Tear Strength, Elmendorf Sometimes called the Elmendorf tear, this tear strength determines the force required to propagate a single-rip tear starting from a cut in a specimen using a falling-pendulum type (Elmendorf) apparatus. 

Uses Adhesive/sealant resin for use in blown and cast film extrusion applies, incl. meat/poultry/seafood/cheese pkg., cereal liners, medical/ pharmaceutical pkg., powd./granularfood and non-food pouches, carded display/skin packaging films edible oil, motor oil, other li prod, pouches, snack structures coextrusions with nylon or in other film structures as heat seal or tie layer Features High clarity grade Regulatory FDA 21 CFR 177.1330 compliant Properties Melt flow 1.5 dg/min f.p. 78 C m.p. 103 C Vicat soften, pt. 81 C ultimate tens. str. 33.1 MPa (MD) ultimate elong. 450% (MD) Spencer impact str. 29 J/mm Dart drop str. 7.9 g/pm Elmendorf tear str. 46.3 mN/pm 9% methacrylic acid... 

Trapezoid tear tester tra-p9- Zoid n. See elmendorf tear tester. 

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