Building & Construction
There is a growing global trend to integrate transparent plastic sheets in place of glass in building applications such as malls, swimming pools, train stations and DYI. The most commonly used option is polycarbonate (PC) sheets, which are produced in solid, multiwall or corrugated form. Each form of the PC sheets has its own production challenges. Because polycarbonate is a transparent polymer, its optical properties are of utmost importance, along with optical manipulations where transparent colors, light diffuser and near-IR heat shielders are used. At Tosaf, we offer a comprehensive range of solutions for PC sheet producers.
PC is very sensitive to UV radiation, therefore UV protection is required. UV protection is achieved through the co-extrusion of UV compounds, but the high level of UV absorber additive in the UV cap layer tends to migrate during the production process, affecting extrusion efficiency. As sheet producers work towards improving the extrusion and co-extrusion process, we have taken on the challenge of developing a range of optimized UV protection additives for use in the production of solid and multiwall sheets.
Light diffusion protection
One of the problems of a clear cover is that it lets in direct visible light, causing an uncomfortable glare. By introducing a light diffusion (LD) system into the PC sheet bulk, the glare is eliminated. We offer several such solutions in both MB and compound form.
Near IR (NIR) absorber
Clear PC lets in NIR energy which, especially in hot climates, can cause a ‘greenhouse’ effect in buildings where the sheets are used. We have developed a range of masterbatches based on special pigments that selectively block the NIR energy, significantly reducing the amount of energy transmitted into the building with minimal effect on visible light.
UV Cap Layer
In PC sheets, protection from solar radiation is achieved by a thin co-extrudate cap layer. We offer several grades of UV cap layer suitable for either solid or multi-wall sheets. All of them minimize plate-out, are gently tinted with a bluish dye to counter the yellow color of the UV absorber, and contain optical brightener to make the layer visible in the lab.Ask For Sample
Light diffusion additives are used to eliminate the uncomfortable glare that can occur when direct sunlight comes through a clear PC sheet. Having developed, improved and built a database of unique light diffuser MB's and compounds, we offer products that maximize light transmission while providing high quality light diffusion.Ask For Sample
In PC sheets, the main challenge in adding additives is to maintain the original transparency properties of the polycarbonate. We have developed several flame retardant solutions that have minimal effect on the sheets’ transparency, causing no reduction in light transmission and an increase of only 1-2% in the original value of the haze. For opaque sheets, we offer a very effective halogen-free solution.Ask For Sample
Anti Block for PC Corrugated Sheets
One of the challenges in the complicated process of producing PC corrugated sheets arises when separating single sheets from the pallet. This difficulty is due to the static electrical forces and the fact that the product isn't protected with masking film in the way that solid or multiwall sheets are. We have developed a simple, cost-effective anti-block solution that has no effect on process or optical properties.Ask For Sample
Near IR Blockers
One of the main drawbacks of using a transparent cover or roofing in construction is that it lets in Near IR (NIR) energy creating a ‘greenhouse’ effect, which causes the covered area to become very hot, especially in summer. Our NIR masterbatch absorbs most of the NIR energy, with minimum effect on transparency to visible light.Ask For Sample
Glass Fiber MB
Unlike other polymers that are reinforced with glass fiber, polycarbonate sheets have excellent mechanical properties. Where glass fiber is used, it is for esthetic purposes, giving the sheet a ‘broken’ or ‘hammer’ effect. Our glass fiber MB contains 20% glass fibers, requiring only 2%-3% addition rate to achieve the desired effect.Ask For Sample
Matte and Frost Effect
Whether to reduce glare or for esthetic reasons, customers may request a matte or frost effect on their PC sheets. We offer several solutions for achieving this special effect.Ask For Sample
As well as standard color MBs for sheet extrusion and injection molding, we offer a wide range of special effect colors, including transparent, opaque, metallic, opal-diffuser and pearlescent. They are all based on high thermal stability dyes and pigments. We also offer a color-matching service with fast turnaround times.Ask For Sample
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