Method and apparatus for measurement of dynamic water break resi

Details Method and apparatus for measurement of dynamic water break resi Method and apparatus for measurement of dynamic water break resi

1998-10-20

2000-12-12

Raevis, Robert

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01N 308

Patent

active

061582875

ABSTRACT:
A novel method for measurement of dynamic water break resistance capable of predicting a degree of paper-cutting at the time of an offset printing and an apparatus for carrying out this method are provided. Both ends of a specimen paper having a size of short-side of from 3 to 15 mm and a long-side of from 120 to 320 mm are kept by a fixed chuck and a movable chuck positioned with a fixed spun length on a measurement table; from 1 to 30 .mu.l of water is attached from a device unit for automatically attaching water onto a central portion of the specimen paper; after the attachment of water, a load is rapidly applied from the both ends of the specimen paper to measure a tensile strength of the specimen paper at the time of attachment of water; and a tensile strength of the specimen paper at the time of drying, i.e., in a state before the attachment of water, is also measured; and a dynamic water break resistance is displayed and evaluated from a percentage of the tensile strength of the specimen paper at the time of attachment of water to the tensile strength of the specimen paper at the time of drying.

REFERENCES:
patent: 2893241 (1959-07-01), Fisher et al.
patent: 3015230 (1962-01-01), Obenshain
patent: 4970250 (1990-11-01), Martinez et al.
patent: 5434222 (1995-07-01), Reiners et al.

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