Are you facing a shortage of 200mm ultra-thick PC Sheet? Ordinary polycarbonate sheet exceeding 50mm in thickness are prone to bubbles and water ripples, and excessive internal stress leads to chipping and breakage during cutting and drilling, resulting in low processing yields. Most small factories lack the technology and capacity to produce stable PC Plastic Sheet, resulting in long delivery cycles and significant quality fluctuations. AHD, with 32 years of focus on engineering plastics, has broken through the technical bottleneck of ultra-thick sheets, achieving stable mass production of defect-free 200mm-grade PC sheets, solving your procurement and processing problems.
Ⅰ. 200mm Thick PC Sheet: Market Scarcity and Technical Challenges
The production technology for 200mm ultra-thick polycarbonate board is not easy. Ordinary thick boards are produced using conventional extrusion, which results in uneven melt cooling and the formation of internal bubbles and stress. Recycled ultra-thick PC sheets may meet short-term standards, but they are prone to yellowing and embrittlement later on, with replacement costs exceeding the purchase price.
AHD uses 100% pure PC particles and a patented process to reduce internal stress in its 200mm PC sheets, giving you peace of mind when purchasing.
Ⅱ. AHD Ultra-Thick PC Plate Core Technology: Precision Manufacturing
1. Raw Material Pre-treatment: Dual Guarantee of Purity and Dryness
High-quality PC raw materials are selected, with a density of 1.20g/cm³. Vacuum dehumidification and drying for 4 hours are employed to control moisture content and prevent high-temperature hydrolysis and bubble formation. The entire process is carried out in a sealed manner to avoid impurities and ensure the transparency of the 200mm polycarbonate sheet.
2. Extrusion Molding: Stable Control of Ultra-Thick Melt
A dedicated high L/D ratio screw with segmented temperature control at 260-290℃ achieves a melt uniformity of 99.5%. A custom static mixer eliminates flow rate differences, preventing uneven thickness in the super-thick PC panel. Slow traction + multi-stage cooling controls the cooling rate and reduces internal stress generation.
3. Stress Relief: Core Technology of a 200mm Thick Clear Polycarbonate Sheet Manufacturer
Extra-long constant-temperature annealing at 125℃ releases residual internal stress. Finished product inspection ensures the overall board thickness tolerance is within industry standards. Transmittance and impact strength are measured, resulting in a high performance compliance rate.
Ⅲ. Common Secondary Processing Methods for 200mm Extra-Thick PC Sheets
PC material has high toughness and good impact resistance, but extra-thick sheets are most susceptible to internal stress, overheating, and rough cutting. Processes must be adapted to the characteristics of thick sheets. The mainstream processing methods are as follows:
1. Large-Scale CNC Precision Cutting / Fixed-Length Cutting
Applications: Cutting large-format raw sheets into square, round, and irregularly shaped protective plates required for equipment.
Advantages: Smooth cut surface, reduces chipping and burrs on thick sheets, suitable for large-size cutting of 200mm extra-thick PC plates.
2. Drilling, Countersunk Hole, and Through-Hole Machining
Applications: Equipment installation and fixing, flange connection, bolt drilling.
Key Points: Drilling thick sheets requires low speed and cooling to avoid high-temperature ablation of the sheet material, internal stress, and subsequent cracking.
3. Milling Grooves, Steps, and Sealing Grooves
Applications: High-pressure viewing window sealing grooves, embedding grooves, equipment splicing positions.
This is an essential processing step for observation windows of pressure vessels and reactors.
4. Precision milling and double-sided polishing
Applications: Repairing water ripples and minor imperfections on sheet surfaces, improving light transmittance, and creating high-transparency observation surfaces.
Mostly used for transparent 200mm polycarbonate sheet high-definition observation windows.
5. Chamfering, rounding, and edge grinding
Applications: Removing sharp edges and corners to prevent scratches during installation and chipping during transportation, while also reducing stress concentration points and preventing cracking over long-term use.
6. Bonding and assembly: In some special applications, extra-thick PC sheets are combined with rubber or aluminum alloy frames to create integrated protective components.
Ⅳ. AHD Advantages: 32 Years of Focus, Stable and Reliable
Where to buy 200mm ultra-thick PC board? AHD guarantees a stable supply. Fast delivery in 7-15 days, free samples and professional selection advice, and after-sales support. We have 32 years of experience in engineering plastics manufacturing, offering a full range of engineering plastic sheets and rods. We have our own R&D laboratory equipped with various testing instruments. A 20,000㎡ modern factory...
AHD 200mm ultra-thick PC sheet production process summary
From raw material selection to precision extrusion, stress relief, and comprehensive testing, AHD breaks through the limits of ultra-thick PC sheet manufacturing through multiple processes. Every 200mm ultra-thick PC sheet undergoes strict quality control, achieving four core advantages: high transparency, high impact resistance, low stress, and easy processing. Solving the three major pain points of market scarcity, unstable quality, and processing difficulties, AHD has become the preferred brand in the fields of industrial safety, high-temperature equipment, and precision machinery.
