Insulated double-layer polycarbonate sheet

How to identify if recycled materials are mixed in the polycarbonate sheet?
Mainly, check for impurities in the sheet. If black spots or crystalline points appear on the sheet, it indicates the presence of impurities. The more impurities there are, the higher the content of recycled materials. A good polycarbonate sheet must be clean and transparent. Additionally, observe the ribs of the sheet; thick and straight ribs indicate high quality, while thin ribs that bend under pressure suggest poor quality.
The quality of the materials can also be judged by observing the fluidity of the melted polycarbonate. Since polycarbonate resin has long molecular chains, repeated high-temperature melting can break down its molecular structure, degrading large molecules into smaller ones. Recycled materials undergo re-melting at high temperatures, causing their molecular chains to break, thereby increasing fluidity. Thus, theoretically, materials with better fluidity in the molten state are of lower quality. Although this method is easy to understand in theory, it is somewhat difficult to perform in practice.

Polycarbonate Sheet Product Features:
(1) Light Transmittance: PC sheets can achieve up to 89% light transmittance, comparable to glass. UV-coated sheets resist yellowing, fogging, and poor transmittance when exposed to sunlight. After ten years, the light transmittance loss is about 10%, while PVC loses 15–20%, and fiberglass loses 12–20%.
(2) Impact Resistance: The impact strength is 250–300 times that of ordinary glass, about 30 times that of acrylic sheets of the same thickness, and 2–20 times that of tempered glass. It is known as "unbreakable glass" and "sound steel."
(3) UV Protection: One side of the PC sheet is co-extruded with a UV-resistant coating, while the other side has anti-condensation treatment. It combines UV resistance, thermal insulation, and anti-fogging functions. It blocks ultraviolet rays, making it suitable for protecting valuable artworks and exhibits from UV damage.
(4) Lightweight: Its density is about half that of glass, reducing transportation, handling, installation, and support frame costs.
(5) Flame Retardancy: According to the GB50222—95 standard, PC sheets are classified as flame-retardant (B1 grade). The self-ignition point of PC sheets is about 580°C, and they self-extinguish after removal from fire. They do not produce toxic gases when burning and do not contribute to the spread of fire.
(6) Bendability: Can be cold-bent on-site according to design drawings to form arches, semi-circular roofs, and windows. The minimum bending radius is about 175 times the sheet thickness, and it can also be heat-bent.
(7) Sound Insulation: PC sheets provide significant sound insulation, outperforming glass and acrylic sheets of the same thickness. Under the same thickness conditions, PC sheets improve sound insulation by 5–9 dB compared to glass. They are the material of choice for highway sound barriers.
(8) Energy Efficiency: Cool in summer and warm in winter, PC sheets have a lower thermal conductivity (K-value) than ordinary glass and other plastics. Their thermal insulation effect is 7–25% higher than that of glass, with insulation efficiency up to 49%. This greatly reduces heat loss, making them suitable for buildings with heating systems.
(9) Temperature Adaptability: PC sheets do not become brittle at -40°C and do not deform at 125°C. Their mechanical and physical properties remain stable even in harsh environments.
(10) Weather Resistance: PC sheets maintain stable physical properties within a temperature range of -40°C to 120°C. After 4,000 hours of artificial weathering tests, the yellowing index is 2, and the light transmittance reduction is about 0.6%.
(11) Anti-Condensation: At an outdoor temperature of 0°C and an indoor temperature of 23°C with relative humidity below 80%, the inner surface of the material does not condense. Condensation flows along the surface of the sheet without dripping.
Yongxin PC structural sheet categories: General-purpose polycarbonate sheets (single-layer), single (double)-sided UV-resistant polycarbonate sheets, textured sheets, frosted sheets, transparent sound barrier panels, scratch-resistant sheets, corrugated sheets, general-purpose multi-wall sheets, single (double)-sided UV-resistant multi-wall sheets, crystal-clear sheets, anti-drip multi-wall sheets, easy-clean multi-wall sheets, anti-drip + easy-clean multi-wall sheets, multi-wall sheets, multi-layer multi-wall sheets, and PC tiles. PC structural sheet varieties: General-purpose single-layer sheets, impact-resistant sheets, transparent sound barrier panels, scratch-resistant sheets, and weather-resistant multi-wall sheets. The products are mainly used for canopies, skylight greenhouses, highway and railway sound barriers, thermoformed skylight domes, and other architectural applications.