Introduction: Transparent Engineering Plastics
PC (polycarbonate) and PMMA (acrylic, plexiglass) are the two most widely used transparent engineering plastics. Each offers unique advantages: PC provides exceptional impact resistance and temperature tolerance, while PMMA offers superior optical clarity and scratch resistance. Understanding these differences is essential for selecting the right material for display signs, protective covers, and transparent components.
PC vs Acrylic: Comprehensive Comparison
| Property | PC Solid Sheet | PMMA (Acrylic) |
|---|
| Light Transmission | 88-90% | 92-93% |
| Impact Resistance | 250x glass | 8x glass |
| Density | 1.2 g/cm³ | 1.19 g/cm³ |
| Tensile Strength | 60-70 MPa | 70-80 MPa |
| Flexural Modulus | 2,300 MPa | 3,200 MPa |
| Heat Deflection Temp | 130-145°C | 95-105°C |
| Cold Bend Temperature | -40°C | -40°C |
| UV Resistance | Requires coating | Excellent (natural) |
| Scratch Resistance | Moderate | Good |
| Chemical Resistance | Attacked by solvents | Resistant to most |
| Cost (relative) | 2-3x | 1.0x |
Display Sign and Advertising Applications
Corporate Signage
Both materials are popular for:
- Reception area signs
- Wayfinding and directional signs
- ADA-compliant tactile signs
- Illuminated channel letters
Product Display Stands
- Countertop displays
- Floor-standing showcases
- Wall-mounted display cases
- Rotating display towers
LED Backlit Signs
Opal white diffusers provide even light distribution:
- Light boxes
- Menu boards
- Retail signage
- Architectural lighting panels
Point-of-Purchase Displays
- Shelf talkers
- Product glorifiers
- Dump bins
- Counter cards
Equipment Protection Applications
Machine Guards
PC is preferred for safety guards due to impact resistance:
- CNC machine enclosures
- Robot work cells
- Conveyor guards
- Press brake guards
Electrical Enclosure Windows
- Switchgear observation windows
- Control panel displays
- Meter windows
- Indicator light covers
Safety Barriers
High-impact PC protects personnel:
- Welding curtains and screens
- Chemical splash guards
- Clean room partitions
- Sound barriers
Processing Technologies
Laser Cutting
CO2 laser cutting provides:
- Precision cuts (±0.1mm)
- Polished edges (no post-processing)
- Intricate shapes and patterns
- Fast turnaround for prototypes
CNC Routing and Engraving
- 3D contouring
- Pocket machining
- Precision engraving
- Edge profiling
Heat Bending
Thermoforming capabilities:
- Line bending for angles
- Drape forming for curves
- Pressure forming for complex shapes
- Minimum radius: 3x material thickness
Silk Screen Printing
- Full-color graphics
- UV-resistant inks
- Backlit applications
- Text and logos
Edge Polishing
Finishing options:
- Flame polishing (acrylic)
- Diamond edge polishing
- Sanding and buffing
- Beveled edges
Sheet Thickness Selection Guide
| Application | Recommended Thickness | Material |
|---|
| Indoor signs, small displays | 1-2mm | Acrylic |
| Outdoor signs, medium displays | 3-5mm | Acrylic or PC |
| Equipment windows, guards | 3-6mm | PC |
| Structural panels, heavy-duty | 6-10mm | PC |
| Machine guards, safety barriers | 4-8mm | PC |
| Light diffusers, LED panels | 2-4mm | Opal acrylic |
Dongguan Chaorong's Processing Capabilities
We offer comprehensive PC and acrylic fabrication services:
- Material sourcing from certified suppliers
- Laser cutting up to 2000mm × 3000mm
- CNC machining with ±0.05mm tolerance
- Heat bending and thermoforming
- Silk screen printing (up to 4 colors)
- Edge polishing and finishing
- Protective film application
- Custom packaging
Conclusion
PC and acrylic sheets each offer distinct advantages for display and protection applications. By understanding material properties and working with experienced processors like Dongguan Chaorong Electronics, designers can select the optimal material and manufacturing processes for their specific requirements.
I. Material Comparison: PC Board vs Acrylic Board
| Performance Indicator |
PC Board (Polycarbonate) |
Acrylic Board (PMMA) |
| Light Transmittance |
88-90% |
92-93% (superior transparency) |
| Impact Strength |
850-1000 J/m |
20-30 J/m (PC is 30-40x stronger) |
| Density |
1.2 g/cm³ |
1.18-1.20 g/cm³ |
| Temperature Range |
-40°C ~ +120°C |
-40°C ~ +80°C |
| Surface Hardness |
Pencil hardness HB-2H |
Pencil hardness 2H-4H (harder) |
| Weather Resistance |
Good (with UV coating) |
Excellent (no yellowing outdoors for 10 years) |
| Machinability |
Easy to bend, cold bending forming |
Thermal bending forming, good polishing effect |
| Price |
Higher |
Lower (about 1/2 of PC) |
Material Selection Suggestion:
- Need high impact resistance → Choose PC board (protective cover, anti-explosion applications)
- Need high transparency, high gloss → Choose acrylic (display signs, advertising boards)
- Long-term outdoor use → Choose acrylic or UV-coated PC board
- Limited budget → Choose acrylic board
II. Display Signs & Advertising Applications
2.1 Acrylic Display Signs
Acrylic is the most commonly used material for display signs, with obvious advantages:
- Transparent display sign: Crystal-clear transparency, showcasing high-end products
- Colored display sign: Rich color options, high brand recognition
- UV printing: Direct printing on acrylic surface, vibrant colors
- Thickness selection: 3mm (small desktop sign), 5mm (standing sign), 8-10mm (large display stand)
2.2 Wayfinding Signs
- Floor directory sign: Acrylic + aluminum alloy frame, beautiful and durable
- Door plate number: Silk-screen or UV printing, clear and durable
- Safety sign: Fire protection, safety warning signs, compliant with national standards
2.3 Lightbox Advertising
- Ultra-thin lightbox: Acrylic light guide plate, uniform illumination
- Vacuum-formed lightbox: 3D立体 letters, strong visual impact
- Outdoor advertising board: Weather-resistant grade acrylic, no fading for 10 years
III. Transparent Protective Cover Applications
3.1 PC Board Protective Cover
PC board, with its excellent impact resistance, is the first choice for protective covers:
- Equipment protective cover: Machine tools, automation equipment transparent windows
- Anti-explosion shield: Anti-splash, anti-impact, protecting operators
- Electronic display protection: Outdoor LED screen, touch screen protective glass
- Thickness selection: 3-5mm (light protection), 8-12mm (heavy-duty protection)
3.2 Architectural Daylighting Applications
- Daylighting roof: PC solid sheet, hail resistance, wind pressure resistance
- Sunroom: PC hollow sheet, thermal insulation
- Sound barrier: Highway noise barrier walls, PC board + sound-absorbing materials
3.3 Automotive & Transportation
- Bus stop shelter: PC board roof, impact resistance, weather resistance
- Electric vehicle windshield: PC board bending forming, transparent and clear
- License plate protection: PC transparent cover, anti-fouling and anti-damage
IV. Dongguan Chaorong Electronics' Processing Capabilities
| Processing Technology |
Processing Precision |
Applicable Materials |
| Laser Cutting |
±0.1mm, smooth cut edge |
Acrylic board |
| CNC Engraving |
±0.05mm |
PC board, Acrylic board |
| Thermal Bending |
Angle precision ±1° |
Acrylic board |
| Cold Bending |
Minimum bending radius ≥ thickness × 150 |
PC board |
| Drilling/Milling |
Hole diameter tolerance ±0.1mm |
PC board, Acrylic board |
| Polishing |
Edge transparent, no traces |
Acrylic board |
| Silk-screen Printing |
Color registration precision ±0.2mm |
PC board, Acrylic board |
| UV Printing |
Resolution 1440dpi |
PC board, Acrylic board |
V. Typical Product Cases
Case 1: Product Display Stand
Customer Requirement: An electronic product brand needed counter display stands
Solution:
- Material: 5mm transparent acrylic
- Process: Laser cutting + CNC engraving brand LOGO
- Surface: Diamond polishing, transparent edge
- Dimensions: 150×100×5mm
- Quantity: 500 pieces
Delivery Cycle: 5 working days
Case 2: Equipment Protective Window
Customer Requirement: An automation equipment manufacturer needed equipment protective windows
Solution:
- Material: 5mm transparent PC solid sheet
- Process: CNC milling + drilling
- Features: Impact resistance, flame retardant, light transmission
- Dimensions: 400×300×5mm, four corners R10 rounded
- Mounting holes: 4×φ6mm mounting holes
Additional Service: Provide dimensional inspection report
Case 3: Outdoor Wayfinding Sign
Customer Requirement: An industrial park needed outdoor wayfinding signs
Solution:
- Material: 8mm weather-resistant grade acrylic
- Process: UV printing + thermal bending forming
- Surface: Protective film, anti-UV fading
- Lifespan: ≥5 years outdoor use without fading
VI. Processing Flow & Quality Control
- Confirm requirements: Material, dimensions, thickness, quantity, process requirements
- Design & drawing: CAD drawing confirmation, generate processing code
- Material preparation: Select high-quality sheets, check appearance
- Processing production: Cutting → Engraving → Drilling → Bending → Polishing
- Surface treatment: Silk-screen printing / UV printing / lamination
- Quality inspection: Dimensional spot check + 100% visual inspection
- Packaging & shipment: PE film protection + foam pad + carton
VII. Material Specification Inventory
| Material |
Thickness Range |
Standard Size |
Color |
| Transparent Acrylic |
2-20mm |
1220×2440mm |
Transparent, frosted |
| Colored Acrylic |
3-10mm |
1220×2440mm |
White/Black/Red/Blue/Yellow/Green etc. |
| PC Solid Sheet |
2-12mm |
1220×2440mm |
Transparent, frosted |
| PC Hollow Sheet |
4-16mm |
1220×2440mm |
Transparent, blue, green |
Why Choose Dongguan Chaorong Electronics?
✓ Multiple CNC machining centers, sufficient production capacity
✓ Laser cutting, thermal bending, silk-screen printing one-stop service
✓ Strict quality inspection, dimensional precision guaranteed
✓ Support custom drawings, small batch prototyping
✓ Fast delivery, regular orders 5-7 days
✓ Professional packaging, worry-free transportation
Contact Information:
Dongguan Chaorong Electronics Co., Ltd.
Address: No. 2 Desheng West 1st Street, Gaobu Town, Dongguan City, Guangdong Province
Main Products: SQ/UC flat wire common mode chokes, FR4 fiberglass boards, carbon fiber boards, bakelite boards, PC/acrylic board precision processing
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