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Precautions for PC board reprocessing

Views: 723     Author: Site Editor     Publish Time: 2021-12-30      Origin: Site

Precautions for PC board reprocessing

In recent years, with the rise of green buildings, the demand for green materials has soared. As ecological building material, clear corrugated polycarbonate is becoming more and more welcomed. Green polycarbonate sheet has very high light transmittance, light weight, and extremely high strength. In particular, the multi-layer UV protection PC board has excellent thermal insulation performance, wonderful cold bending characteristics and ultra-low weight.

Of course, the most praiseworthy feature of PC plate is its good processing performance. It is not easy to break and can be cold bending. Although PC plate is easier to be processed into the specified shape, if not careful, the plate might be damaged, and the overall project, affected.

Precautions for cutting

1. The plate must be fixed firmly, so as to prevent rough edge and crack due to plate vibration;


2. All tools must be programmed to the model of cutting plastic materials and fine-toothed blades must be used;


3. Plate protective film should not be removed from the surface of the plate to prevent scratches on the surface;


4. After the plate cutting is completed, all cutting edges should be cleaned to remove burrs and gaps, and then the plastic scraps and dust should be blown clean with compressed air.

50.pmma sheet

Precautions for opening

1. The plate should be fixed firmly to reduce the impact of vibration on the dimensional accuracy of drilling;

2. The distance of the opening close to the edge of the plate is 1~1.5 times that of the diameter of the drilling hole;

3 All the diameter of the hole must be larger than the diameter of the bolt. If a 145℃ heat treatment is to be done in high precision drilling it is recommended that the plate aperture be increased about 5%;
4. When drilling thick plates, the holes must be cleaned regularly to prevent excessive debris and heat generation due to friction.

Notes for hot bending

1. Before hot bending, general plate should undergo dry treatment. Because if the plate is not dry enough, it may lead to the generation of bubbles during the hot bending process. During the drying process, the plates should not be stacked, but should be separated by 20~30mm to facilitate ventilation.


When using the hot molding machine, in order to reduce the heating time and save energy, it is recommended that PC sheets be kept in the drying box before processing.

The plate can be cooled at room temperature after drying, but the next hot bending process should be carried out within 10 hours after cooling.

Before hot forming, polycarbonate plates should be thoroughly cleaned using antistatic cleaning agent or ionized compressed air, so as to avoid surface defects.

The drying process can be skipped if only hot bending is required. Use infrared heater to do local heating treatment will suffice.


For plates with a thickness of more than 3mm, double-sided heating is recommended. The advantage of double-sided heating is that the material is heated more evenly and faster, which can effectively shorten the molding time and save production cost.

The plate must be uniformly heated. The highest accuracy can be obtained at the molding temperature range of 175~205℃.


In order to avoid a large amount of heat loss or uneven cooling at the edge of the plate in the heating process, it is recommended to adopt adjustable clamping device to improve the thickness distribution state, so that the plate can be hot formed under mechanical pretension.


PC board after hot forming should be cooled on the processing tool. Only when it forms stable shape and size, can it be removed from the tool.


In order to reduce the internal stress of the plate in the process of heating and cooling, the plate after forming should be quenched and tempered that is to heat the parts, let it maintains a certain temperature and then slowly cools down.

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