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Elongation ASTM

3 Tear Strength (ASTM D1004, ASTM D1922 and D1938) [Pg.107]

Tear strength is an important property measured for quality control by blown film processors. There are various methods of measuring tear strength in film, as seen by the multiple ASTM methods listed above. These focus on the resistance to either the initiation of a tear (rupture) or the propagation of an existing tear. [Pg.107]

The most popular method used for quality control uses a pendulum device (Fig. 6.3) to measure the resistance to tear propagation (ASTM D1922). For this test, specified test samples are die cut and include a slit at one end. The tabs formed on either side of the slit are clamped into the device so that when the pendulum is released a so-called trouser leg tear force is applied along the specimen in the direction of the slit. The test device reports the maximum resistive force carried in the film. Commonly, ten specimens in both the machine and transverse direction of the film are tested. [Pg.108]

4 Impact Resistance (ASTM D1709, D3420 and D4272) [Pg.109]

In many film applications the product is subjected to puncture or impact loads. These types of loads are applied perpendicular to the plane of the film. Therefore, the stresses act biaxially (in both the machine and transverse directions simultaneously) and are not represented well by a uniaxial test. Impact resistance tests are designed to biaxially load the film to measure its energy absorbing capability. [Pg.109]

Elongation (ASTM- D-412-61T) Minimum Propagation Thickness, inch Sheet (steel back 0.042 ... [Pg.521]

Instead of block copolymers, the use of pseudo-random linear copolymers of an aliphatic a-olefin and a vinyl aromatic monomer has been reported [20], where the styrene content of the polymer must be higher than 40 wt%. Preferred are styrene and ethylene copolymers. These blends may contain, amongst other things, an elastomeric olefinic impact modifier such as homopolymers and copolymers of a-olefins. Presumably the styrene-ethylene copolymer acts as a polymer emulsifier for the olefinic impact modifier. Using 5 wt% of an ethylene-styrene (30 70) copolymer and 20% of an ethylene-octene impact modifier in sPS, a tensile elongation (ASTM D638) of 25 % was obtained. [Pg.423]

Elongation (ASTM D 4848). The ratio of the extension of a material to the length of the material prior to stretching (cf. extension). [Pg.452]

Impact strength (ASTM 0256-73) Per cent elongation (ASTM 01238)... [Pg.64]

Tensile strength and elongation ASTM D 5034 grab test... [Pg.89]

Tensile Modulus, strength and % elongation (ASTM D412) [7]. [Pg.372]

Tensile Impact, kJ/m Elongation, % ASTM D638 ASTM D638 9.0 56.8 143.6... [Pg.2851]

See other pages where Elongation ASTM is mentioned: [Pg.441]    [Pg.370]    [Pg.255]    [Pg.343]    [Pg.146]    [Pg.434]    [Pg.100]    [Pg.29]    [Pg.191]    [Pg.343]    [Pg.38]    [Pg.158]    [Pg.262]    [Pg.431]    [Pg.475]    [Pg.803]    [Pg.987]    [Pg.4]    [Pg.43]    [Pg.94]    [Pg.871]    [Pg.871]    [Pg.488]    [Pg.107]    [Pg.125]    [Pg.158]    [Pg.262]    [Pg.431]    [Pg.475]    [Pg.803]    [Pg.942]    [Pg.987]    [Pg.40]    [Pg.6772]    [Pg.6773]    [Pg.6774]    [Pg.6776]    [Pg.9024]    [Pg.434]    [Pg.82]   


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