Tearing strenght tester

TEARING STRENGTH TESTER

Purpose
This instrument consist of test specimen clamp, knife to slit test specimen, pendulum
type sector to test specimen and pointer. The instrument is designed to measure the
The resistance to tearing or tearing strength of paper.

Principle
The work done is W(H-h) gram-centimeter and tearing strength should be W(H-h)/2D…….Formula A
Where H is the height in centimeters of the center of gravity of the sector above the horizontal line A-A’ when the sector is raised as for
tearing to the test specimen. Where h is the height in centimeters of the center of gravity of the sector above the horizontal line when the
sector is released and allowed to swing and tear the test specimen.
Where W is weight of the sector and D is length of the test specimen torn

D = 4.3 *16 =68.8

How to use
Cut sample by size 7.5 cm X 6.2 cm as much 16 sheet with same direction to every sample
Install sample at nipper appliance and close turned a roundly
Torn by using available knife appliance
Depress appliance pendulum holder so that the pendulum swing are free
Hold up pendulum and bring back on course early
Read the result of examination with set of GF of indicative needle

TEARING STRENGTH TESTER
Construction

Scale
Pendulum
Engraved line
Shaft
Knife
Base of clamp
Clamp
Screw
Stopper
Stop mechanism
Grip
Level screw
Maximum idle pointer
Pointer stop


Spesifications

Measuring range : Tearing strength 0 -100
Total distance : 137.6 cm
Diameter from center
Of gravity of sector to
Point of suspension : abt. 9.7 cm
Sector angle in raised
Position : abt. 70 degree
Space of occupied : 47(L) x 24(W) x 51(H) cm