Film Tear Tester - Technical Literature

Thin Film Tear Tester - Technical Literature Jinan Sanquan Zhongshi Experimental Instrument Co.
, Ltd.
production of tear tester, using the Elemmendorf method
.

The instrument complies with the relevant standards in "GB/T 16578.
2-2009/ISO 6383-2 Determination of tear resistance of plastic films and flakes
, Part II: Elmendor method".

This part of GB /T 16578 specifies the method of cutting a specified incision on a thin and soft plastic sheet or film specimen under specified load conditions, and determining the force
required to extend the incision tear to a specified distance.

Tear strength refers to the force required to tear a polymer material specimen by a prescribed method, expressed
in N.

To determine the tear strength, it is common to use: (1) Pants tear method
.

Suitable for the determination
of tear strength of soft and hard films (including embossed films) and flakes under 1 mm at a specified test speed.

The specimen with a crack length of half the length of the specimen itself undergoes a tensile test on the two "trouser legs" formed by its cracks, and the tear strength
of the subject material is calculated by the average force required to tear the specimen along the length of the specimen.

When the result is not expressed as tear strength, it can be expressed
only as a tear force.

(2) Elemmendorff's law
.

It is a method
for determining the force required to cut out a specified length of a specified crack on a specimen of a thin and soft plastic sheet or film under specified loading conditions.

This method is not suitable for harder materials
such as PVC, nylon and polyester film.

During the test, the specimen with a prescribed incision withstands the tearing force generated by the energy stored by the prescribed pendulum, which is directly read out by the degree disc, and the force value is used as the tearing strength of each specimen, expressed
in N.

The upper limit of the thickness of the specimen depends on the tearing force of the material associated with the measuring range of the
tester.

The Elemmendorf method is suitable for materials such as soft polyethylene (PVC) and polyolefin films, but the changing elongation and oblique tearing can make the test repeatability of larger films poor
.

This method is not suitable for harder materials
such as rigid POLYVINYL, polyacidamines and polycol films.

1 .
2 The Elemmendorf method is also suitable for specimens cut from mountain and semi-finished products
.

When the test data have good reproducibility, this method can be used as a specification for quality badge control, acceptance or rejection of finished or semi-finished products
.

1 .
3 There is no direct linear relationship
between the tearing force and the specimen thickness.

The results obtained by this method are expressed in terms of tearing force (Newton), and the specimen thickness
should also be reported.

Comparison is only possible with data obtained at the same thickness, as data obtained from specimens of different thicknesses are often incomparable
.

Next, let's take a look at the technical parameters of the instrument, welcome to inquire, get the free overall solution swing capacity 200gf, 400gf, 800gf, 1600gf, 3200gf, 6400gf resolution 1mN specimen clamping Pneumatic oscillator release Pneumatic Dimensions 450mm×340mm×530mm (length, width and height) Weight 0kg Working temperature 5°C-35°C RH Relative humidity 70% Power supply 220V 50Hz Film Tear Tester - Technical Literature