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Acrylic (PMMA)

Table of Contents

1. Basic Introduction

Acrylic, chemically called PMMA (Polymethyl Methacrylate), is a transparent amorphous thermoplastic. It is also known as organic glass, originally developed by Rohm & Haas. As a high-transparency substitute for glass, it has two main processing forms: extruded acrylic sheet and cast acrylic sheet.

2. Core Advantages

  1. Outstanding light transmittance Light transmission rate reaches over 92%, clearer than ordinary glass. It transmits UV light selectively and can be customized with UV-blocking formulas.
  2. High impact resistance Impact strength is 10–20 times higher than soda-lime glass, not easy to shatter into sharp fragments when broken, safer for display and construction.
  3. Lightweight property Density is only half of glass, easy to cut, transport and install, reducing load for brackets and frames.
  4. Weather & aging resistance Cast acrylic maintains transparency and gloss outdoors for decades without yellowing or cracking, ideal for outdoor signage.
  5. Easy machining & molding Can be sawed, laser cut, polished, thermoformed, bonded and printed. It can be made into complex curved shapes by heating.
  6. Smooth and elegant appearance Glossy surface, rich color options including clear, frosted, tinted and fluorescent colors.

3. Disadvantages

  • Low surface hardness, prone to scratches; special polishing is required to repair marks.
  • Poor heat resistance: continuous service temperature only around 80°C, will soften and deform at high heat.
  • Brittle under extreme low temperature; easy to crack under strong impact without modification.
  • Weak resistance to organic solvents like acetone, alcohol and paint thinner, which will erode its surface.

4. Main Applications

Advertising & Signage

Lightbox panels, outdoor billboards, letter signs, display stands, exhibition decorations.

Construction & Decoration

Transparent partition walls, shower panels, window substitutes, decorative craft ornaments.

Optical & Lighting

Lampshades, light diffuser plates, optical lenses, aquarium tanks.

Consumer & Daily Goods

Cosmetic display racks, photo frames, transparent storage boxes, craft gifts.

Medical & Instrument

Medical observation covers, instrument protective windows, dental temporary materials.

5. Basic Physical Parameters

  • Density: 1.19 g/cm³
  • Light transmittance: 92%
  • Continuous working temperature: -40°C ~ 80°C
  • 24h water absorption: 0.3%

PMMA (Acrylic) Material Parameter Table

Parameter NameReference Specifications
PriceCost depends on PMMA grade, part volume, machining complexity and order quantity; transparent grades have different pricing from colored ones
Lead TimePrototypes: 3–5 working days; Mass production: 7–12 working days
Wall ThicknessMinimum 1.0 mm; optimal range 1.5–6 mm; Too thin walls crack easily during cutting; thick sections need stress relief to avoid crazing
Dimensional ToleranceStandard tolerance ±0.08 mm; Precision tolerance ±0.03–0.05 mm with additional cost, in accordance with ISO 2768-m
Maximum Part SizeCNC solid sheet/block/rod processing: 1200 × 1000 × 300 mm
Available PMMA Grades1. Clear virgin PMMA: high light transmittance, transparent optical grade2. Impact-modified PMMA: enhanced anti-cracking performance3. Heat-resistant PMMA: higher continuous service temperature4. Color PMMA: black, white, blue, red and custom tinted acrylic5. Anti-UV outdoor PMMA: resistant to yellowing under sunlight

Frequently Asked Questions

  To shorten the delivery cycle of CNC workpieces, we start with the documents submitted by customers. Please provide complete and clear 2D drawings, 3D models, dimensional tolerances, surface requirements, and processing specifications, and specify special materials, surface treatments, and assembly standards. Avoid incomplete drawings, ambiguous markings, and version confusion.
Complete documents enable direct programming, order splitting, and production scheduling, cutting down repeated confirmation and supplementary work. Customers are also advised to finalize order quantity, delivery schedule, and special requirements in advance. Eliminating repeated communication and rework risks at the source accelerates the whole process and effectively shortens the overall lead time.

  With 12 years of expertise in CNC machining, YUEYI stands out from other manufacturers and middlemen. Our factory covers an area of 4,000 mu and is equipped with over 100 processing machines. We achieve a machining precision up to 0.001 mm, capable of producing high-precision components. Backed by standardized production management, our on-time delivery rate reaches 98%. As a direct manufacturer with full in-house production capacity, we control every production link without outsourcing. We deliver consistent quality, outstanding precision and reliable lead time, making us your trustworthy partner for CNC precision machining.

  Fast delivery is one of our key strengths. For 3D printing orders, we support delivery within 3 days, ideal for rapid prototyping and urgent sample requests. For regular CNC machining projects, the standard lead time is around 3 weeks.
We manage the whole process in-house, from drawing review and process planning to production, quality inspection, and shipment, with no intermediate links. Equipped with complete facilities and an experienced team, we reliably fulfill both urgent sample orders and mass production. We guarantee stable lead time and consistent quality to keep your projects on track.

  We offer a full range of surface treatments with rich color options. Our services include anodizing, powder coating, spray painting, electroplating, wire drawing, sandblasting, and polishing. Anodizing features various colors and strong anti-corrosion performance for aluminum parts. Powder coating and spray painting come with extensive color selections and durable coatings. Electroplating enhances luster and rust resistance. Wire drawing creates fine linear textures, while sandblasting delivers a matte finish. Polishing achieves a bright and smooth surface. All finishes can be customized in colors and styles to match your application needs.

  Yes, we fully provide complete material certificates and relevant test reports for all CNC-machined parts. All raw materials are sourced from qualified suppliers with authentic documentation. We can offer material certifications, dimension inspection reports, and quality test records upon request. Every product is strictly inspected before delivery. These official documents fully guarantee material compliance and product quality, supporting your quality audit and project requirements.

  We take strict quality control measures in advance to prevent non-conforming products. Every workpiece is fully inspected dimensionally and visually during and after production to ensure full compliance with design drawings and specifications.
In the rare case of non-compliant items, we will take immediate responsibility. We will promptly confirm the issues with you, then arrange free rework or remanufacturing as required. All related costs will be borne by us. We will also analyze the root cause to optimize our processes and avoid similar problems recurring. Our goal is to deliver qualified products steadily and safeguard your project progress.

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