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| *ETHOCEL
is a trademark of the Dow Chemical Company. |
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ETHOCEL (Ethylcellulose)
is widely used as a binder in the firing pastes such as of conducting
materials, dielectric materials and insulating materials.
Following are main reasons why ETHOCEL is used. |
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Suitable especially for
the application of a screen painting. |
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Excellent in the solubility
in the solvents |
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(of high boiling point
such as terpineol and BCA). |
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Moderate firing pattern being obtainable. |
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Excellent in the dispersibility of various materials. |
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Excellent in the firing resolvability. |
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Though ETHOCEL has
the above excellent physical properties, we have to take some
measures to meet customers' severe requests in quality such
as for less than one micron in Ni paste's thickness for MLCC
application, and for zero (0) in the number of foreign material
for PDP application.
We are not in a position to cope with the above requests with
Standard ETHOCEL (Ethylcellulose) for the following reasons:
The insoluble cellulose, and the black carbide (if contained
in paste) in ETHOCEL (Ethylcellulose), will cause the troubles
such as a void in conducting materials or insulating materials,
which leads to an inferiority in conductivity or insulation
respectively.
The solvent also greatly effects the features of paste. Especially
in the case of using the terpineol, the content each of alpha-terpineol,
beta-terpineol and gamma-terpineol depends on the origin (China,
South America, etc.) of a pine tree (raw materials) or on the
refining conditions, which leads to a change in the solubility
of ETHOCEL, effecting the viscosity and causing the appearance
of gel-like substance. |
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| To solve the above
problems, we had studied various measures, which led to our
succeeding in developing EC Vehicle where ETHOCEL (Ethylcellulose)
is dissolved in a specific solvent. |
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| Following are advantages of EC Vehicle: |
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Constancy in viscosity. |
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Constancy in solid content. |
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Removal of foreign matter. |
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Capability of adjusting the fluidity. |
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EC Vehicle is effective
in producing a good paste each for MLCC application and PDP
application. Our customers used to do a complicated work of
viscosity adjustment to get a certain viscosity of ETHOCEL
(Ethylcellulose). EC Vehicle can release them from the above
labor.
For example, especially in the production of the fluorescent
paste for PDP, the ingredient contained in ETHOCEL (Ethylcellulose)
greatly effects the coloring property of fluorescent paste.
So grasping the above correctly, we are providing EC Vehicle
suitable for fluorescent paste.
From such a viewpoint, we can also provide EC Vehicle suitable
for the paste for Rib or Dielectric substance. We are also
developing EC Vehicle of higher adhesive strength and of
environment-friendly. |
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List of EC Vehicle |
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| Grade |
Main application |
Feature |
| EC-100 FTP |
Fluorescent substance |
Low viscosity,
High-speed screen printing,
Pattern printing,
Thickening of coating,
Controlling
of foreign matter/gel |
| EC-200 FTP |
Fluorescent
substance |
High viscosity,
Inlaying
printing type,
Thinning of coating,
Controlling of foreign matter/gel |
| EC-300 FTP |
Fluorescent
substance |
Low resin quantity,
Inlaying
printing type,
Improvement in firing efficiency,
Controlling of foreign
matter/gel |
| EC-100 FTR |
Rib |
High adhesive
strength, Improvement in alkali resistance,
Controlling of foreign
matter/gel |
| EC-200 FTR |
Rib,
Electrode |
Fine line printing,
High
thixotropic type,
Controlling of foreign matter/gel |
| EC-100 FTD |
Dielectric substance |
High leveling,
Controlling of foreign matter/gel |
| EC-200 FTD |
MLCC |
Thin screen printing,
Controlling
of foreign matter/gel |
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| Generally speaking, the
fluidity of vehicle depends on the feature of powder blended, and
also on the process in which paste is used. So we are designing the
vehicle with the aim of obtaining the fluidity meeting each materials
and process. |
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From a processing viewpoint |
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EC-Vehicle (Example: EC-100
FTD) of high leveling type |
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This type is suitable for the coatings such as
with a roll coater and with a doctor blade, being excellent in surface
smoothness after coated, and in adhesion with basic substance. |
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EC Vehicle (Example: EC-200
FTR) of high thixotropic type |
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This type is suitable (sharp and precise)
for screen printing, though surface smoothness is unobtainable.
It is excellent especially in fine pattern, high-speed printing and
printing wear resistance. |
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From a materials view point |
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EC-Vehicle (Example: EC-100
FTD) for the fine powder and |
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the powder of high specific
surface and/or of high oil absorption. |
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The above powder comes to be a thixotropic paste
through being blended with an ordinary vehicle. However, this powder
can obtain a good leveling through being blended with EC Vehicle. |
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EC Vehicle (Example: EC-200
FTR) for the coarse powder and |
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the powder of low specific
surface and/or of low oil absorption |
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The above powder comes to be an anti-thixotropic
paste through being blended with an ordinary vehicle. However, even
this powder can obtain a good thixotropy through being blended with
EC Vehicle. |
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For more information, please contact
Electronic Materials Team at the following office:
| Osaka Head Office |
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TEL: +81-6-6203-1891 |
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FAX: +81-6-6227-0612 |
| Tokyo Branch Office |
TEL: +81-3-3866-1141 |
FAX: +81-3-3866-1480 |
| Nagoya Branch Office |
TEL: +81-52-581-3361 |
FAX: +81-52-581-6504 |
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