PC PMMA Composite Sheet
High-performance PC/PMMA composite sheet combining the impact resistance of polycarbonate with the optical clarity, surface hardness, and abrasion resistance of PMMA for smartphone back covers, automotive displays, touch panels, and membrane switch applications.
PC PMMA Composite Sheet
Kaixin KX-AC211 series PC PMMA composite sheet is a high-performance optical material manufactured through advanced multi-layer co-extrusion technology. It combines the impact resistance and toughness of polycarbonate (PC) with the optical clarity, surface hardness, and abrasion resistance of PMMA.
The sheet features a PMMA outer layer for improved surface hardness, scratch resistance, and wear resistance, while the PC inner layer provides impact protection, bending strength, and overall structural toughness.
Available specifications include dual-layer sheets from 0.2–2.0 mm and triple-layer sheets from 0.5–2.0 mm.
KX-AC211 series PC PMMA composite sheet is widely used in smartphone back covers, automotive interior display panels, electronic display windows, touch panels, camera lens covers, membrane switch panels, and other optical or decorative electronic applications.
Unique Technology & Performance
Advanced Multi-Layer Co-Extrusion Technology
Process Highlights: Utilizing Germany-imported Breyer co-extrusion equipment, our precision temperature control and lamination technology enable flawless PC PMMA co-extrusion. The inner PC layer delivers impact protection while the outer PMMA layer ensures high hardness and wear resistance, achieving over 91% light transmittance (ISO standard testing).
Performance Breakthrough: Transcending limitations of single-material solutions, post-hardening surface hardness reaches up to 6H (pencil hardness test) with 200% higher impact strength versus conventional PMMA, perfectly balancing protection and aesthetics.
Customization Service
Dimensions: Thickness (0.2mm–2.0mm) and dimensions (standard width: 1240mm; length customizable via cutting) can be flexibly tailored to meet client requirements.
Surface Treatment: Options include matte, glossy, fine-grain sanded, textured, anti-fingerprint, or hard-coated finishes, balancing functionality with aesthetics.
Color Customization: Equipped with advanced color-matching capabilities, we offer extensive standard colors and precise custom tinting based on provided color codes. This enables unique brand-specific palettes and visual styles, achieving seamless integration of design and functionality.
Applicable Processing Techniques
PC/PMMA composite sheets combine the high toughness of polycarbonate (PC) with the gloss and hardness of acrylic (PMMA), offering excellent structural stability and processing adaptability. Based on practical industrial applications and material properties, we recommend the following processing methods:
printing using various techniques, cutting, punching, laser cutting, thermoforming, insert molding, and bonding with other materials (self-adhesive).
Application Cases
PC/PMMA Composite Sheets: An Ideal Alternative for Smartphone Back Cover Materials
As smartphones continue evolving toward higher screen to body ratios, thinner and lighter designs, and enhanced durability, the limitations of traditional glass back covers, such as weak impact resistance and high processing complexity, have become increasingly evident. To address this challenge, Kaixin has partnered with leading brands including OPPO, vivo, Xiaomi, and Transsion to introduce an innovative PC/PMMA composite sheet back cover solution. This material is rapidly gaining traction as an effective glass alternative in the mid-to-high-end smartphone market.
Why is PC/PMMA Composite Sheet the Ideal Choice for Back Covers?
Exceptional Performance Fusion:
Through advanced co-extrusion technology, it perfectly combines the ultra high impact resistance of polycarbonate (PC) with the superior scratch resistance of polymethyl methacrylate (PMMA). This endows the back cover with outstanding bend resistance and printability, fundamentally overcoming the fragility inherent in glass.
Premium Surface Treatment and Protection:
Featuring advanced nano-scale surface treatment and an integrated anti-fingerprint (AF) coating, it delivers a silky-smooth touch while effectively resisting fingerprint smudges and oil adhesion for effortless cleaning. Its ultra-high surface hardness provides exceptional wear and scratch resistance, ensuring daily protection against sharp objects and maintaining a crystal-clear, flawless appearance over time.
Unparalleled Design Freedom and Aesthetics
Diverse Color Customization
Supports a wide range of color options to meet brand-specific aesthetic demands.
Complex Textures and Curved Surfaces
Key processes such as UV transfer for refined texture molds and high-pressure molding for 2.5D/3D curved structures offer exceptional design flexibility. This enables precise realization of high-end aesthetics, from intricate patterns to complex 3D shapes, surpassing the processing capabilities of glass.
Proven Manufacturing Adaptability
The end-to-end process, encompassing texture design, precision printing, coating, high-pressure molding, surface hardening, and CNC finishing is mature and efficient, ensuring high yield rates and consistency in mass production.
Application of PC PMMA Composite Sheets in Automotive Displays
In smart vehicle cockpits, display panel aesthetics during screen-off states present critical challenges: visible color boundaries between ink zones and viewable areas compromise visual unity. As consumer demand for premium cabin experiences grows, achieving “seamless black” (indiscernible color difference between display/ink zones when off, perfectly blending with surroundings) has become essential.
Kaixin gray PC PMMA composite film is specifically engineered for hidden displays and functional integration, delivers the ideal solution for “All-in-one Black” and “full-surface black with zonal transparency.”
Widely adopted in central control screens, instrument clusters, and beyond, its uniqueadvantages include:
Superior Optical Performance
Enhances display contrast while drastically reducing ambient light interference, ensuring clear visibility under strong illumination
Precision neutral density control optimizes light management, improving display homogeneity and color accuracy
Immersive Visual Comfort
Gray hue naturally integrates with interior trim, minimizing visual intrusion while elevating cabin harmony and premium aesthetics
Reduces eye strain during prolonged driving
Perfect Screen-Off Aesthetics
Enables “hidden display” technology with deep, uniform surface appearance when deactivated
Eliminates color boundary lines for truly unified “seamless black” integration
Application of PC PMMA Composite Film in Membrane Switches
Conventional membrane switch materials force compromises between durability and aesthetics: pure PC films offer flexibility yet remain scratch-prone, while pure PMMA resists scratches but provides inadequate impact resistance. Our high performance PC PMMA composite film overcomes these limitations through superior optical and mechanical properties, establishing itself as the ideal material for premium membrane switch panels.
The composite sheet delivers exceptional printability and processability, supporting screen printing, UV printing, and thermal transfer for vibrant, high-adhesion graphics. It accommodates diverse processing methods—including die-cutting, stamping, laser cutting, and thermoforming to achieve custom shapes and functional windows. Surface finishes are customizable as matte, glossy, or functional coatings (anti-fingerprint, anti-glare) to enhance tactile experience. With structural stability that prevents warping and ensures dimensional integrity, the material readily integrates capacitive touch controls and printed circuitry, aligning with the evolution toward intelligent membrane switches.
Quality Control
Kaixin strictly adheres to its internal Product Inspection Standards to comprehensively oversee the appearance, structure, and performance of materials. Specifically addressing crystallization defects, we have established clear threshold limits to ensure a clean surface free of perceptible particles, thereby preventing impacts on print quality and visual consistency. Additionally, multiple testing mechanisms are implemented for critical properties such as protective film performance, adhesion, and abrasion resistance. This guarantees robust material performance during processing and application.
Leveraging sustained technological innovation and high precision manufacturing capabilities, Kaixin PC PMMA composite sheets have been widely adopted across smart devices, automotive electronics, and home appliance control panels. Recognized as a preferred partner for high-performance composite solutions, we have earned strong endorsement from leading brands including OPPO, vivo, Xiaomi, and Transsion.
Frequently Asked Questions
What application problems does PC PMMA sheet solve compared with single-material sheets?
PC PMMA composite sheet helps solve two common limitations of single materials: standard PC is easier to scratch, while PMMA has weaker impact resistance. By combining a wear-resistant PMMA outer layer with an impact-resistant PC inner layer, the material provides a better balance of surface aesthetics, durability, and structural strength.
What are the advantages of PC PMMA sheet compared with tempered glass?
Compared with traditional tempered glass, PC PMMA sheet offers better impact resistance, lower risk of shattering, lighter weight, and greater processing flexibility. It is especially suitable for applications that require curved surfaces, lightweight structures, and premium visual appearance.
How does PC PMMA sheet achieve both high hardness and high toughness?
The material is produced through a multi-layer co-extrusion process. The PMMA layer provides surface hardness, optical clarity, and abrasion resistance, while the PC layer provides internal toughness and impact support. With additional hard coating treatment, the surface hardness can reach up to 6H.
What appearance and surface options are available for PC PMMA sheet?
Kaixin PC PMMA sheet supports various surface effects, including glossy, matte, fine-grain, textured, anti-fingerprint, and hard-coated finishes. Color and grayscale levels can also be customized to meet brand-specific design and visual integration requirements.
Is PC PMMA sheet suitable for 2.5D or 3D curved designs?
Yes. PC PMMA sheet is compatible with high-pressure forming, thermoforming, and other molding processes, making it suitable for 2.5D and 3D curved structures. This gives designers more freedom than many glass-based solutions.
Where is PC PMMA sheet commonly used?
PC PMMA composite sheet is commonly used in smartphone back covers, automotive displays, electronic display windows, touch panels, camera lenses, membrane switch panels, and other applications requiring optical clarity, surface durability, and impact resistance.
Why choose Kaixin PC PMMA sheet for smartphone back covers?
For smartphone back covers, PC PMMA sheet provides a high-performance alternative to glass. It combines lightweight design, drop resistance, printability, curved-surface processing, and premium appearance, making it suitable for mid-to-high-end mobile device applications. For application-specific material selection, you can request a recommendation.
Request a PC PMMA Sheet Recommendation
Planning a smartphone back cover, automotive display, touch panel, or membrane switch project? Send us your required thickness, application, surface finish, color or grayscale target, forming process, and performance requirements. Kaixin will help recommend a suitable PC/PMMA composite sheet configuration.