 Testing
The Dura-Fibre®
T.E.A.M.S. (Testing, Evaluating, Analysis and Measurement Services)
program gives you an all-encompassing analysis and evaluation of your
products. This in-depth research puts values on what you are currently
using, and makes recommendations for a better end result. Once this
is approved, we’ll develop a prototype so you know exactly what
you are getting. For you this means no guesswork and no surprises. We
offer a number of specialized services, depending on the product. However,
this will give you an idea as to what Dura-Fibre’s standard testing
services include.
Testing Services
Include:
- Tensile Strength
- Bursting Strength
- Internal Bond
Strength (ZDT)
- Basis Weight
- Thickness/Caliper
- Compression Strength
- Deflection
- Score Bending
- Porosity
- Coefficient of
Static Friction
Tensile
Strength
This measures the maximum force necessary to rupture a material. Measured
in pounds per inch, tensile strength is indicative of the strength derived
from factors such as fiber strength, fiber length and bonding.
Bursting
Strength
The bursting strength test of paperboard focuses primarily on tensile
strength and elongation properties and is a composite measure in pounds
per square inch. This strength is dependent on the type, proportion,
preparation and amount of fibers present in the sheet and on their formation,
internal sizing and surface treatment.
Internal
Bond Strength (ZDT)
ZDT measures the internal fiber bond strength of fiberboard, and is
useful when determining the strength of the board in relation to glue
bonding and possible delamination on scoring, or use of high tack inks
and coatings.
Basis Weight
Basis weight is a measure of the mass per unit area of paper and paperboard
and is expressed as pounds per thousand square feet (or grams/m2). Since
most paper is bought and sold in accordance with its mass per unit area,
the grammage is significant in determining price. The values of physical
properties such as bursting strength, thickness and bulk are interpreted
and specified with regard to grammage.
Thickness/Caliper
Thickness or caliper of paperboard is measured primarily for quality
control and design of end use products. Thickness is one of the most
important characteristics that affects flexural stiffness and is indicated
in thousandths of an inch and/or “points”.
Compression
Strength
Compression strength testing is used to determine a paperboard shipping
container’s resistance to external compressive forces. These forces
are typically related to those exerted on containers in stacks or encountered
in transportation.
Deflection
Flexural stiffness measurements can be of value in determining a board’s
requirements for uses such as construction materials where rigidity
is desired. This test is used to measure the bending resistance of paperboard
in the machine or cross machine direction.
Score Bending
Used to evaluate the bending quality of paperboard, score bending assesses
the suitability of paperboard for conversion into cartons without score
line rupture of the outer surface. In other words, this test evaluates
the quality of the score.
Porosity
The porosity test measures the air permeance of a circular area of paper
and is influenced by the internal structure and surface finish. The
results may be used as an indirect indicator of variables such as absorbency
(penetration of oil, water, etc.), apparent specific gravity and filtering
efficiency for liquids or gases.
Coefficient
of Static Friction
This test determines the coefficient of static friction of most packaging
materials by measuring the angle at which one surface begins to slide
against another inclined surface as the incline is increased. A high
coefficient of one surface to itself means that containers having that
surface will tend to resist sliding in unit loads. A low coefficient
may also indicate potential problems with packages slipping from the
load. |
