Before cleaning, it can be seen from the enlarged picture that it is three-dimensional glass with gaps.

Place in PTC13 (85% PTC13, 15% water) at 70°C, heat and soak for 10 minutes.

Watch on the desktop

Suggestions and discussions:

4.1 PTC13 confirms that the hardened black frame ink on the provided CG samples can be effectively peeled off.
4.2 Placed at 70°C, heated and soaked for 10 minutes is a preliminary test condition, not the best parameter. It is recommended that process engineers need to reconfirm the corresponding parameters of time and temperature in order to find the shortest time and optimum temperature.
4.3 Automation suggested process:
4.3.1 Soaking tank. Soak at 70°C PTC13 for 5-10 minutes. Swell and peel hardened ink.
4.3.2 Rinsing tank. According to the appropriate cleaning design, it is divided into 3~6 washing and drying.
4.4PTC13 can generate a zeta potential greater than -45mv. Make the glass surface and the particle form an effective repulsive negative voltage. While peeling off the hardened ink on the glass, it can also effectively remove grease and particle pollution on the glass.

Before cleaning, the surface is partially covered with epoxy vinyl overflow glue.

Zoom in on the darker part for observation:

Soak in 50% PTC13 micro-dust cleaning agent heated to 80°C for 30 minutes, and then scrub with red pickle cloth (without carborundum). (You can also use wet sandblasting instead of scrubbing with a pickle cloth)

After cleaning. It can be found that the black liquid glue on the surface has been completely removed.

Observing the surface with a microscope, it is found that the overflow glue has been removed:

Discussion: The efficiency of scrubbing with red pickle cloth is poor. It is recommended to grind and scrub with micron grade emery cloth, which is more efficient.

Before washing, look. Lots of Epoxy spills on the lead frame.

Take a piece of wire frame, the photo of the wire frame below, the right side of the red dotted line, is the part that has not been tested by chemical cleaning. Soak with dust cleaning agent PTC13 at 80°C for 5 minutes.

After spraying with water mist, it is found that most of the overflowing glue can be effectively removed.

Observed under a microscope, it was confirmed that the overflow glue can be effectively removed, but the cup frame formed by Epoxy resin has also been corroded.

Comparison: The picture on the left is before cleaning, and the picture on the right is after soaking for 5 minutes with ACHM04-F Hardened Ink Remover at 80°C. It is found that the shape of the cup frame is relatively vague.

In conclusion, it is confirmed that PTC13 can effectively remove overflow glue, but it will corrode the cup frame formed by Epoxy resin. Therefore not suitable for use.

Before washing. It can be cleaned under a clean room with strong light, and it can be seen that there are many particles on the surface. The purpose of cleaning the workpiece is to remove the hardened black frame ink on the cover glass and the particles on the glass.

Put it in PTC13 (85%PTC13, 15% water) at 70℃, heat and soak for 10 minutes.

Rinse off with pure water.

Place it in a dust-free dark room and observe with strong light. quite clean.

Suggestions and discussions:

5.1 PTC13 confirms that the hardened black frame ink on the provided CG sample can be effectively peeled off.
5.2 Placed at 70°C, heated and soaked for 10 minutes is a preliminary test condition, not the best parameter. It is recommended that process engineers need to reconfirm the corresponding parameters of time and temperature in order to find the shortest time and optimum temperature.
5.3 Automation suggested process:
5.3.1 Soaking tank. Soak at 70°C PTC13 for 5-10 minutes. Swell and peel hardened ink.
5.3.2 Rinsing tank. According to the appropriate cleaning design, it is divided into 3~6 washing and drying.
5.4 PTC13 can generate a zeta potential greater than -45mv. Make the glass surface and the particle form an effective repulsive negative voltage. While peeling off the hardened ink on the glass, it can also effectively remove grease and particle pollution on the glass.