If you are, or want to be, involved
in any facet of the manufacture or sale of baby diapers, sanitary napkins,
adult incontinence or similar absorbent products, please read through
our pages and contact our Consultant, Philip Hardy, by phone,
fax or e-mail.
device for the repetitive raising and dropping of disposable absorbent
products in front of a light box in order to quantify the breaking
strength of the absorbent core within the outer envelope and to
observe the mode and position of breakage.
The product can be
tested in a dry condition or with a specific targeted insult so
that the dry and wet strengths of the product can be determined
at different stages of saturation.
A reliable and
consistent test device for the determination of a pad strength parameter
in absorbent products such as diapers, underpads, shaped pads or
The device can be fitted
with a fixed or variable speed motor. Our standard operating speed
is 60 drops per minute. The electrical cabinet has a counter, a
motor speed console, a setting indicator and an emergency stop button.
A remote Stop/Start
hand operated console is provided so that the device Operator
can stop and start the unit while still observing the test piece
at the front of the unit.
ability of the absorbent core of a disposable product to remain
intact before and after absorption of fluids despite the dynamic
impact from the wearer is an important performance parameter of
Our HIT device is the only tester available on the market that reliably
and consistently evaluates the strength of the absorbent core within
the product envelope. This new device and test method finally provides
a reliable means of evaluating the core integrity.
This video shows the electronic
version. A video of the manual version is shown below.
of the absorbent core is dependent on several factors -
Pad density Pad
to roll materials
Drum forming consistency
Integrity Test (HIT) method and device finally resolves this
issue for disposables manufacturers. A real evaluation of the
integrity of the core can be achieved for production consistency
monitoring and as a key design development parameter.
SAP and fluff homogeneity
Core compression /
Removal or reduction
of tissue layer
Improvement of adhesive
Modification of embossing or compression
Modification of absorbent core structure
Adjustments in fluff and SAP content
Comparison with other
brands in dry and wet states
Comparison with other pad structures
All longitudinal elastics
are cut from the absorbent product (if present).
The trial products are placed in
the clamps thus suspending them in front of the light box
The height of drop is set at the
required level (0 to 80mm).
The light box is switched on.
The motor is switched on and the
product is repetitively dropped from the set height until a complete
crack is observed across the core.
The above test results were achieved for
two very different baby diaper cores. The blue curve was
a diaper without a carrier material, the red curve was
with top and bottom tissue glued to the core.
The Diaper break-up curve is created from the average values
for a set of samples. A characteristic curve is produced
for a specific insult quantity.
The scatter chart above shows
the HIT results for the diaper Sample B. Each point on
graph is a test result for a sample diaper. The X axis
is the drop height and the y axis is the number of
was dropped before a full failure crack appeared in the core.
This general funnel shape is typical of all HIT results;
test results being more closely grouped as the drop height
increases. The narrower the funnel shape,the more
consistent is the drum forming operation.
The daily or weekly drop height graph will give
indications of two quality parameters:
Consistency of the pad formation. Any cassette
(mould) defects can be quickly identified. Improved consistency
of pad formation will be reflected by a narrowing of the range
Improvement in the pad integrity: A rise in
the average line (red line above) indicates general improvement
of the pad integrity of the product.
Contact us at Disposables Consultancy Service
if you would like to receive more information. A video of the test and
device is available on request. Please contact
us if you require a price for this equipment.
The standard light box is 900mm high x 600mm wide and will be adequate
for testing all products up to 1300mm high. Smaller vertical light boxes,
600mm high x 450mm wide are available on request.
The lightbox frames are generally off-white (RAL8016),
but can also be in black. (See device at top of page)
Electrical power can be 120 or 220V.