PVC Transparent Sheet Machine
Product Overview
The PVC Transparent Sheet Extrusion Line produces high-clarity PVC sheets for packaging, stationery, thermoforming, and industrial glazing applications. With transparency exceeding 88%, these sheets compete with PET and polycarbonate in applications requiring chemical resistance, fire retardancy, and cost efficiency.
The line features a single-screw extruder with venting capability, a precision T-die for uniform thickness, and a chrome-plated three-roll calender that produces optically clear surfaces. The venting system removes volatiles and moisture that would otherwise cause bubbles — critical for achieving maximum transparency.
Transparent PVC sheets are produced in thicknesses from 0.3mm (thin packaging) to 8mm (thick glazing). The most common products are 0.5mm stationery folders, 1-2mm thermoforming sheets, and 3-5mm industrial glazing panels. Online thickness measurement ensures consistent gauge across the full sheet width.
PVC transparent sheets offer inherent fire retardancy (self-extinguishing), excellent chemical resistance, and good printability — advantages over PET and polycarbonate in specific applications. However, they require careful formulation to prevent yellowing and maintain clarity over time.
Key Features
Single-screw extruder with venting
Precision T-die for uniform thickness
Chrome-plated three-roll calender
Online thickness measurement
Automatic winder or cutter
Production Process
From raw material to finished product — each step is engineered for quality and efficiency.
High-Purity Formulation
Low-filler or filler-free PVC compound with high-clarity resin (SG-7 or SG-8 type), transparent stabilizers, and minimal coloring. Material purity is critical for optical clarity.
Vented Extrusion
The vented single-screw extruder removes moisture and volatiles from the melt at 170-190°C. This degassing step is essential for bubble-free, high-clarity sheets.
T-Die Extrusion
The melt flows through a precision T-die with adjustable lip. Die temperature uniformity (±2°C) ensures consistent thickness and optical properties across the width.
Three-Roll Calender
Chrome-plated, mirror-polished calender rolls control thickness and produce an optically smooth surface. Roll temperature is precisely managed to prevent stress and optical distortion.
Thickness Measurement
Online beta gauge or laser thickness measurement provides real-time feedback to the die adjustment system, maintaining ±0.02mm tolerance.
Winding or Cutting
Thin sheets (0.3-2mm) are wound into rolls; thick sheets (3-8mm) are cut to panels. Automatic winding maintains constant tension for flat, wrinkle-free rolls.
Technical Specifications
| Extruder Model | SJ-90/120 |
|---|---|
| Sheet Width | 1000mm - 1500mm |
| Sheet Thickness | 0.3mm - 8mm |
| Transparency | ≥ 88% |
| Production Speed | 5-15 m/min |
| Total Power | ~75-110 kW |
Why Choose Wings Plastic
Vented Extruder
The venting system removes volatiles that cause bubbles and haze — essential for achieving 88%+ transparency in thick sheets where trapped gases would be visible.
Mirror-Polished Calender
Chrome-plated calender rolls with mirror finish produce optically smooth surfaces without visible roll marks — critical for transparent sheet applications.
Online Thickness Gauge
Real-time thickness measurement with automatic die adjustment maintains ±0.02mm tolerance, ensuring consistent optical properties across the full sheet width.
Inherent Fire Retardancy
PVC is self-extinguishing (LOI 45%), providing fire safety advantages over PET and polycarbonate — particularly important for building and transportation applications.
Chemical Resistance
PVC transparent sheets resist acids, alkalis, and many solvents better than polycarbonate, making them suitable for industrial glazing and chemical processing applications.
Quality Assurance
Every production line undergoes rigorous quality verification before delivery:
- Light transmission measured with haze meter per ASTM D1003
- Thickness uniformity verified at 5 points across sheet width
- Surface quality inspected for bubbles, flow marks, and optical distortion
- Yellowing index tested to verify long-term clarity stability
Typical Applications
Frequently Asked Questions
With proper formulation and processing, PVC transparent sheets achieve 88-91% light transmission. Haze levels below 3% are achievable with high-purity formulations and mirror-polished calender rolls.
PVC can yellow under UV exposure. For outdoor applications, we recommend UV-stabilized formulations that maintain clarity for 5+ years. For indoor applications (stationery, packaging), yellowing is negligible.
Yes, PVC sheets up to 3mm are excellent for thermoforming — blister packs, clamshell packaging, and formed covers. PVC has a wide thermoforming window and good deep-draw capability.
PVC offers better chemical resistance, inherent fire retardancy, and lower cost. PET has better recyclability and higher impact resistance. For stationery and blister packaging, PVC is often preferred; for food packaging, PET is required.
Related Products
Related Technical Articles
Ready to Get Started?
Contact our team for a customized PVC Transparent Sheet Machine solution tailored to your production needs.
Contact Us