| HS Code | 101670 |
| Product Name | Winlite PFCB 0.76 mm |
| Material | Paper-based phenolic resin copper clad laminate |
| Thickness | 0.76 mm |
| Copper Foil Thickness | 35 µm (1 oz/ft²) |
| Standard Panel Size | 1020 mm x 1220 mm |
| Color | Light brown / natural phenolic |
| Flame Retardancy | UL 94 V-0 |
| Peel Strength | ≥ 1.0 N/mm |
| Volume Resistivity | ≥ 10^12 Ω·cm |
| Surface Resistivity | ≥ 10^11 Ω |
| Dielectric Constant | 4.0 to 5.0 at 1 MHz |
| Dissipation Factor | ≤ 0.04 at 1 MHz |
| Flexural Strength | ≥ 100 MPa |
| Thermal Stress | 260°C for 20 seconds without blistering |
| Moisture Absorption | ≤ 0.5% |
| Operating Temperature | -40°C to 130°C |
As an accredited Winlite PFCB 0.76 mm factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Each pack contains 10 sheets of Winlite PFCB 0.76 mm, individually protected in sealed packaging to prevent damage during storage and transport. |
| Container Loading (20′ FCL) | Winlite PFCB 0.76 mm sheets packed in crates, loaded securely into 20′ FCL container for safe transport. |
| Shipping | Winlite PFCB 0.76 mm is a non-hazardous polyethylene foam sheet, not regulated as dangerous goods. Ship in sturdy cartons or on pallets with protective wrap to prevent damage. Store dry, away from heat and ignition sources. Standard ground or air freight is acceptable with no special chemical handling requirements. |
| Storage | Store Winlite PFCB 0.76 mm in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible chemicals. Keep it in its original sealed packaging to prevent contamination and moisture absorption. Store flat to avoid warping or creasing the thin material. Avoid contact with strong oxidizers and sharp objects. Maintain ambient temperature and low humidity for best performance. |
| Shelf Life | Shelf life is typically two years from manufacture date when stored in original packaging, cool, dry, and away from direct sunlight. |
In printed membrane switch stacks, Winlite PFCB at 0.76 mm serves as the reverse-printed second-surface substrate rather than as a base film. The second surface is printed with a UV-curable silver flake conductive ink through a 200–250 mesh polyester screen to deposit a wet film between 18 µm and 25 µm; the same ink is diluted no more than 3–5% with a glycol ether acetate reducer to retain edge resolution at 150 µm line/space. After printing, the trace pattern is cured at 120–200 mJ/cm² UVA at 365 nm, followed by a dielectric UV-curable ink layer with a dry film build of 10–14 µm. Solvent selection is constrained because unmodified polycarbonate is stress-crack sensitive to aromatic hydrocarbons, chlorinated solvents, and ketones; formulations based on MEK, toluene, or xylene produce visible crazing around punched holes and can compromise silver trace adhesion. The overlaminate is an acrylic pressure-sensitive transfer tape applied at 25–70 µm thickness, with peel adhesion verified by ASTM D3330 Method A after 72 h dwell. Embossed actuator zones are formed at 120–140 °C under low-pressure pneumatic actuation, leaving a tactile dome height of 0.3–0.6 mm. Die cutting uses sharp steel-rule dies with a bevel angle of 45–60°; holes smaller than 0.8 mm are routed or laser-cut to avoid notch cracking at the perimeter. Thermal/humidity exposure is screened per ASTM F1596-15; adhesion and cosmetic stability are assessed after 500 h at 85 °C and 85 % RH. Terminal parts include industrial HMI overlay arrays, appliance control keypads, and diagnostic instrument faceplates that require second-surface graphics, actuator tactile response, and resistance to routine cleaner exposure.
Diagnostic card lamination uses the 0.76 mm polycarbonate film as a transparent cover over reagent channels, printed electrodes, or lateral-flow nitrocellulose strips. The primary process constraint is sterilant compatibility. Ethylene oxide at 55 °C and 60–70 % RH is absorbed into amorphous polycarbonate; post-cycle residual gas requires forced aeration at 50–55 °C for 8–12 h to clear the ISO 10993-7 daily exposure limit. Gamma irradiation at 25 kGy or higher induces visible yellowing and a measurable loss of molecular weight, so terminal gamma sterilization is generally limited to low-dose processes or replaced by ETO. Plasma hydrogen peroxide at 45–55 °C causes surface oxidation that lowers surface energy before capillary flow; if used, the card must be re-corona-treated to 50–56 mN/m prior to final adhesive closure. The cover film is laminated with a UV-curable acrylate adhesive at a coat weight of 15–35 g/m²; cure is performed with 300–500 mJ/cm² UVA through the film, requiring an optically clear grade with haze below 1 % per ASTM D1003. Laser conversion with a 9.3 µm CO₂ source yields acceptable edge clarity at 0.76 mm; 10.6 µm CO₂ lasers may be run at reduced speed to prevent localized edge stress. Cytotoxicity and skin irritation are evaluated under ISO 10993-5 and ISO 10993-10, with the supplier responsible for maintaining the master file supporting the film’s resin identity. Terminal products include lateral-flow assay cartridges, PCR chip retainers, and disposable point-of-care test cards.
| Method | Typical cycle window | Observed effect | Processing requirement | Reference |
|---|---|---|---|---|
| Ethylene oxide | 55 °C, 60–70 % RH, 4–6 h gas dwell | Residual EO uptake | Forced aeration at 50–55 °C for 8–12 h | ISO 10993-7 |
| Gamma | 25–40 kGy | Yellowing, molecular weight loss | Restrict to low-dose terminal cycle | ISO 11137-1 |
| Hydrogen peroxide plasma | 45–55 °C | Surface oxidation, reduced surface energy | Re-corona to 50–56 mN/m | ISO 14937 |
| Electron beam | 15–25 kGy | Lower thermal load, oxidative edge effects | Dose rate control and post-exposure adhesion check | ISO 11137-1 |
Published data for this specific Winlite grade under all cycle conditions is limited; validation runs are required before release of finished diagnostic consumables.
For vacuum forming of clear equipment covers, a 0.76 mm gauge places the forming window between 170 °C and 205 °C surface temperature. Below 170 °C, internal stress and microcrazing occur at fold radii; above 205 °C, surface gloss loss and bubble formation appear as residual moisture converts to steam. The sheet must be pre-dried to 0.02 % maximum moisture, normally by forced-air desiccant drying at 120 °C for 2–4 h; at ambient RH above 60 %, sagging control and drying time become critical. Forming is conducted on a single-station vacuum former using twin quartz-emitter infrared heaters whose surface pyrometer controls the sheet within ±5 °C. Mold temperature is held at 80–100 °C to reduce frozen-in stress and maintain part geometry. A draw ratio up to 2.2:1 is practical for this gauge; corners thinner than 0.25 mm can be expected where plug-assisted draws exceed 45 mm depth on a 100 mm diameter forming area. Tooling is polished aluminium or electroless nickel plate; silicone-free release is used where optical clarity is retained. After forming, parts are annealed at 120 °C for 30 min per 1 mm nominal thickness to relax orientation near draw radii. Dust control is managed by ionised air neutralisation because clear polycarbonate develops a static charge during trimming and stacking. Terminal products include transparent medical device enclosures, laboratory instrument covers, and machine guard windows.
Dielectric barrier use of this 0.76 mm polycarbonate film is governed by IEC 60664-1 pollution degree and creepage/clearance requirements. The film is die-cut into barrier sheets installed between bus bars, heat sinks, and cell tabs in power converters and battery modules. Before cutting, dimensional stabilisation is carried out at 125 °C for 30 min to reduce post-punch shrinkage; inner corners receive a minimum radius of 0.5 mm to avoid electric-field concentration and mechanical tear propagation. Flammability class is grade-specific: clear unmodified PC film at this thickness commonly meets UL 94 V-2, while phosphorus-based flame-retardant grades may be listed V-0 at the same gauge; the final insulation system must be tested under UL 746A and UL 746C for the relevant end-product category. Surface contamination is controlled because conductive debris can bridge creepage distances; lamination with a 50–100 µm acrylic transfer adhesive is carried out after an isopropanol wipe and ionised-air rinse. The following verification matrix is used for incoming material and converted parts.
| Property | Test method | Conditioning | Acceptance basis |
|---|---|---|---|
| Dielectric strength | IEC 60243-1 | 48 h at 23 °C and 50 % RH | No breakdown below design voltage |
| Volume resistivity | IEC 62631-3-1 | 48 h at 23 °C and 50 % RH | Greater than 1 × 10¹⁴ Ω·cm typical for unfilled PC |
| Comparative tracking index | IEC 60112 | 48 h at 23 °C and 50 % RH | Use grade-reported CTI for creepage calculation |
| Dimensional stability | ASTM D1204 | 30 min at 125 °C | Machine-direction shrink ≤ 0.5 % |
| Flammability | UL 94 | 48 h at 23 °C and 50 % RH | Grade-specific V-2 or V-0 |
Published dielectric strength values for standard polycarbonate film are commonly reported at 20–30 kV/mm under IEC 60243-1, but the design must use the supplier’s stated test voltage for this exact gauge. Terminal products include battery pack insulation frames, DC-DC converter separator sheets, and touch-safe barriers in industrial power supplies.
In backlit instrument cluster lenses, the 0.76 mm film is decorated on the second surface, hard-coated on the first surface, and then formed in a single pass to maintain optical alignment. A polysiloxane hard coat is applied at 3–8 µm dry film thickness by flow coating or spray coating; after flash-off, the coating is cured at 120–130 °C for 30–60 min. Adhesion between the hard coat and polycarbonate is tested with a cross-cut method using 2 mm spacing per ASTM D3359 Method B; acceptable production lots show no more than 5 % removal. Abrasion resistance is checked by Taber abrasion per ASTM D1044 using CS-10F wheels at 500 g load for 500 cycles; hard-coat technical data sheets generally report a haze increase below 10 % for polysiloxane systems on polycarbonate. Forming after decoration requires pre-calculated artwork distortion of 2–5 % in the machine direction for shallow dome geometries. Xenon-arc interior weathering is run per SAE J2412 at 300 kJ/m² at 340 nm; no cracking or delamination is accepted, although slight colour shift may be measurable in unstabilised grades. Terminal products include instrument cluster lenses, gear selector indicator covers, and HVAC control faceplates with selective backlit legends.
Industrial equipment labels and safety nameplates convert the 0.76 mm film by second-surface printing with high-opacity UV-curable ink, lamination with a 70–120 µm acrylic adhesive, and flat-bed cutting. The printed surface is protected because the graphic is viewed through the 0.76 mm polycarbonate carrier; this permits cleaning with neutral solvent-free agents without ink attack. The converted part is tested under ASTM D4060 for abrasion resistance and ASTM G155 for xenon-arc stability where outdoor exposure exceeds 2 years equivalent. Terminal products include motor rating plates, safety lockout tags, and barcode panels on process machinery.
Competitive Winlite PFCB 0.76 mm prices that fit your budget—flexible terms and customized quotes for every order.
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| Property | Test method | Typical published range for 0.76 mm polycarbonate flat clear board | Relevance to 0.76 mm format |
|---|---|---|---|
| Nominal thickness | ISO 7823-1:2003 | 0.76 mm ±0.05 mm | Controls die clearance, forming behavior, and optical flatness |
| Density | ISO 1183-1:2019 | 1.19–1.21 g/cm³ | Low mass compared with glass of equivalent thickness |
| Tensile yield strength | ISO 527-2:2012 | 55–65 MPa | Determines handling and cold-forming resistance |
| Tensile elongation at break | ISO 527-2:2012 | 80–120% | Thin-gauge toughness and tear resistance |
| Flexural modulus | ISO 178:2019 | 2200–2500 MPa | Bending stiffness of flat barriers |
| Notched Izod impact | ASTM D256-23 | 600–900 J/m | Impact strength differentiation from PMMA |
| Vicat softening temperature B50 | ISO 306:2022 | 145–152 °C | Short-term thermal stability |
| Light transmittance, clear | ISO 13468-1:2019 | 88–91% | Optical clarity for displays and glazing |
| Haze, polished surface | ASTM D1003-21 | <1.5% | Display and glazing quality |
| Water absorption, 24 h | ISO 62:2008 | 0.15–0.20% | Pre-drying requirement before thermoforming |
| Material or product format | Notched Izod impact under ASTM D256-23 | Visible light transmittance, clear grade | Vicat softening temperature | Primary compatibility constraint |
|---|---|---|---|---|
| Winlite PFCB 0.76 mm polycarbonate flat clear board | 600–900 J/m | 88–91% | 145–152 °C (ISO 306:2022) | Aromatic solvents, amines, alkaline cleaners above pH 10.5 |
| Cast PMMA sheet | 16–32 J/m | 92–93% | 95–108 °C (ISO 306:2022) | Alcohol-based cleaning and mechanical scratch sensitivity |
| PETG sheet | 80–120 J/m | 88–91% | 73–82 °C (ISO 306:2022) | Higher coefficient of thermal expansion; lower heat resistance |
| Rigid PVC sheet | 20–80 J/m | 85–88% | 70–85 °C (ISO 306:2022) | Plasticizer migration, smoke, and acid gas in fire |
