Zwick has collaborated with the paper, board and corrugated board industries to develop a large range of test fixtures and accessories especially for their products. Multi-functional, highly flexible testing machines replace the single-purpose machines used previously, saving space and reducing investment costs.

1. Materials Testing
of Paper and Board
Intelligent testing

2. 2
Paper and board testing
Testing various paper materials with Zwick
2015Paper and board testing
tests on raw paper for
corrugated board
tests on sanitary paper
tests on corrugated board and
products
tests on solid board and
products
tests on special paper, graphic
paper and printing paper
tests on paper composites

3. 3
 box crush test > loading up to nominal load or failure
 stacking crush test > defined force maintained until failure
or for a specified time
 Measuring to DIN EN ISO 12048
 standard and customized solutions
available from Zwick
 no re-equipping required in conjunction
with other tests
Box crush test
Measuring the strength and stackability of
corrugated board cartons
2015Paper and board testing
Box crush testing machine

4. 4
 Measuring to DIN 53121 and ISO 5628
 flexure test kit anvils allow for corrugated
board properties
 measurements with buckled or warped
specimens also possible
movable anvils
 stiffness automatically calculated with
regard to elasticity limit
4-point flexure test
Measuring 4-point flexural stiffness of corrugated board
2015Paper and board testing
4-point flexure test

5. Zwick twin-bladed circular saw
5
 specimen preparation is very important
specimen cut must be clean and square
 specimen saw for safe operation
 reliable operation (adjustable cutting
speed, constant feed-rate, counter)
Edge crush test (ECT)
Edge crush test (ECT)
Measuring the strength of corrugated board with fluting
aligned vertically
2015Paper and board testing
 Measuring to DIN EN ISO 3037 and TAPPI T 811
 ECT is important because it provides information regarding the
crush resistance of the finished corrugated board packaging
 compression platens can be used for other compression tests
such as RCT, CMT and FCT
 precision-guided compression platens for outstanding lateral
stiffness

6. 6
 Measuring to DIN EN ISO 3035 and TAPPI T 825
 Used to determine the strength of fluting
 FCT is not suitable for multi-layered corrugated
boards; CMT is used for this
 Extremely stiff compression platens available for
micro-flute board
 Thickness measurement possible during test
 Compression platens can be used for other tests
such as RCT, CMT and FCT
 Precision-guided compression platens for
outstanding lateral stiffness
Flat crush test (FCT)
Flat crush test (FCT)
Compression loading of single-fluted corrugated board
perpendicular to its surface.
2015Paper and board testing

7. 7
 Measuring to DIN 53142-2
 very good correlation between
PET and LPET
 low result variation
 test papers from approx. 80g/m²
to heavy duty corrugated board
(no modification required)
 wet testing also possible
 test already national standard
See also:
ball burst test on tissue to
DIN EN ISO 12625-9
(similar to LPET)
Puncture test LPET
Ball burst test on tissue
Measurement of energy required to puncture the specimen
Puncture test on cardboard (LPET)
2015Paper and board testing

8. 8
 Measuring to DIN EN ISO 2758 or 2759
 burst test is program-controlled
 variable data logging rate
exact determination of maximum pressure
exact matching to comparative instruments
possible
 fast, easy diaphragm replacement
 visual monitoring via test curve
 numerical monitoring of diaphragm characteristics
Burst test (BST)
Burst test equipment
Zwick burst testers are flexible in installation and use
2015Paper and board testing

9. 9
 Measuring to ISO 9895 and TAPPI T826
 very stiff test arrangement
low reaction on specimen
 load cell and specimen are on the same
symmetry axis
 test paper from approx. 100g/m²
Strip crush test (SCT)
Strip crush test (SCT)
Measuring the strength of corrugated board raw paper in a
compression test
2015Paper and board testing

10. 10
 Measuring to ISO 12192 and TAPPI T822
 precision-guided compression platens for outstanding
lateral stiffness
 compression platens can be used for other tests such as
RCT, CMT and FCT
 specimen thicknesses from 0.1mm-0.5mm
Ring crush test (RCT)
Strength of liner or fluting measured – similar to SCT
2015Paper and board testing
Ring crush test (RCT)

11. 11
 For measuring flexural strength on paper and
board (DIN 53121, ISO 5628, according to ISO
2493-1) and plastic films (DIN 53350). Also for
measuring the technical quality of creasings
(DIN 55437-3)
 flexibility provided by varied gripping systems,
load cells, adjustable bending lengths and limit
stops for various specimen widths
 limit stops for rapid clamping and positioning of
specimens
 pneumatic and spring grips for reproducible,
user-independent clamping
 load cell applied away from moving machine
components, eliminating parasitic signals
 high-precision angle and force measurement
2-point flexure test
2-point flexure test
Determining flexural strength and the technical quality of
creasings in a 2-point flexure test
2015Paper and board testing

12. 12
 Measuring to ISO 15359 and
TAPPI T 549
 Fast and easy handling
 High precise force
measurement
Friction test
Horizontal plane method
Measuring the frictional properties of paper and paper
laminates
2015Paper and board testing

13. 13
 Measuring to TAPPI 541
 5 specimens per paper strip
can be tested
 comparable to other test
fixtures
 lower result variation than for
Scott bond test, which is used
to determine similar paper
properties
 low consumption of double-
sided adhesive tape
 semi-automatic version
available
Internal bond test (Z-direction)
Internal bond test
Determining the bond strength between layers of multi-layered
paper
2015Paper and board testing

14. 14
Paper Compressibility
This test allows evaluation of paper behavior under
compressive load, e.g. in a press
2015Paper and board testing
Determination of
 maximum compressive stress
 total deformation before and after hold time
 plastic deformation
 elastic deformation
Specimen
Compr. platen
Load cell
Extensometer
resoln 20 nm
Loading ball
Functional principle

15. 15
Tensile test
Tensile test to ISO 1924
Determining tensile properties using various methods
Zero span tensile test
2015Paper and board testing
 Tensile tests provide information about
characteristic values including stiffness,
modulus, tensile strength, tear length and
energy absorption
Tensile test to DIN EN ISO 1924-2 und
TAPPI T 494
 measuring tensile properies in
dry state
Zero span tensile test to TAPPI T 231
 Measuring the fiber strength of
paper free length of 0.1mm adjustable
 Modular system: specimen grips can also
be used for other tensile tests

16. 16
Finch Clamp to DIN ISO 3781, TAPPI
T 456 and DIN EN 12625-5
 measuring wet
strength tissues
 modular system:
specimen grips can also be
used for other tensile tests
 straightforward handling
Initial Wet Paper to DIN 54514
 measuring the minimum tensile
strength of the still
wet paper web
 specimen grips specially developed
for this purpose:
 surplus liquid can drain away without
the risk of pre-damaging the paper
 specimen securely gripped
Tensile test
Finch clamp
Determining tensile properties using various methods
Initial wet paper
2015Paper and board testing

17. 17
Offset printing papers
 measuring force-deformation behavior before
printing, i.e. in defined moistened condition
 very rapid procedure possible
 most specimen can be placed in the specimen
grips in seconds; test then starts automatically
Tensile test
Horizontal tensile test
Determining tensile properties using various methods
2015Paper and board testing

18. Contact
Zwick GmbH & Co. KG
August-Nagel-Str. 11
89079 Ulm, Germany
Tel: +49 7305 - 10-0
Fax: +49 7305 - 10-200
www.zwick.com/medical
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Science blog
2015Paper and board testing 18