A NEW test method for resistance to mechanical penetration of sanitary tissue papers (ball burst procedure) was recently approved by TAPPI. The new method is T570-00.
It is also under final ballot at ASTM and in review at CEN (European Committee) for standardisation.
The new standard was developed because traditional Mullen type burst testing instruments do not offer the force sensitivity and extensibility necessary when testing materials with lower strength properties such as toilet tissue, facial tissue, table napkins and paper towels.
Thwing-Albert's burst tester, available from IDM Instruments , provides a high level of accuracy necessary for measuring mechanical penetration resistance of tissue products.
Penetration resistance is a vital characteristic when evaluating performance of tissue, paper and non-wovens. Thwing-Albert's tester provides data that is easily correlated with end use penetration strength.
It also provides an improved level of accuracy over other burst testers, when used with materials which have higher extensibility and lower strength properties such as toilet tissue, facial tissue, table napkins and paper towels.
Utilising APS & MAP for Windows NT, test parameters are easily set up. Test data can be printed and stored on a PC and viewed as a graph including multiple curves and average reference curves.
· Force required to penetrate.
· Displacement at maximum force.
· Energy at maximum force.
· Total burst energy.
As absorption of liquid is a key indicator of material performance, the tissue burst tester is designed to perform wet testing as well. A water drip plate protects the unit when testing wet samples and a plastic drain tube ensures easy clean up.
The system is supplied with a 2kg load cell, and a sample clamp with a diameter of 3.5 inches (8.89 cm). The clamping surface is coated with neoprene to hold the sample securely.
In addition to providing information on tissue products, penetration resistance is also useful for testing flexible barrier films and nonwovens.