GeBE-TESTBENCH Linerless
GPT-4673
5.3
TEST-FUNCTIONS
The thermal printer GeBE-Testbench Linerless is developed
for the following tests:
1. Silicone and adhesive contamination of the printhead
2. Print quality of linerless paper
3. Partial detachments (strips) of silicone
4. Slip test of linerless platen material
5. Sticking of the paper to the platen during downtimes
5.3.1 PRINTHEAD CONTAMINATION
SILICONE AND ADHESIVE CONTAMINATION OF THE
PRINTHEAD
To produce linerless paper, silicone is applied to the
thermal layer of the base paper.
The silicone serves as a separation layer for the adhesive
on the paper back side.
The amounts of silicone vary from 0.6 g/m
2
up to 1.4 g/m
2
depending on the roughness of the base paper.
The more silicone that has been applied, depending on how
it is anchored to the substrate, the more it will be scraped
off and deposited by the printer mechanism during the run.
The accompanying ingredients in the silicone create a kind
of self-cleaning effect. Therefore small amounts of
removed silicone do not lead to an accumulating
contamination. But larger quantities can not be sufficiently
removed and accumulate more and more.
If the silicone layer is not completely closed, adhesive
components can penetrate through the silicone layer,
which destroys the thermal layer and deposits on the
printhead during printing. These adhesive components
stick very hard on the printhead and are difficult to remove.
In addition, they insulate the heating elements of the
printhead and, if they are not removed in time, lead to the
destruction of the printhead. Adhesive residues on the
printhead are an indication that the silicone layer is not
sufficiently closed.
The GeBE Standard Test prints 2700 typical retail tickets in
a row. Thereafter, the printhead is inspected.
GeBE Elektronik und
phone
+49.89.894141-0
GeBE-document-no. GPT-4673-LL-Testbench-C32-E-SMAN-V1.0-0973
Feinwerktechnik GmbH
fax
+49.89.894141-33
date September 4, 2019
Beethovenstraße 15
page 15 | 34
82110 Germering
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Germany
Internet
www.gebe.net
Errors and changes reserved.
