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B2B Technical Dossier • Custom Fabrication

Custom-Shaped “Stone” That Actually Bends:
Only Thermoformable Acrylic Solid Surface Can Do It

Architectural curves shouldn’t crack, whiten under heat, or trap dirt in visible glue seams. Engineered with 100% pure acrylic resin and premium aluminum trihydrate (ATH), Foshan Kangyi delivers seamless, zero-radius thermoforming and monolithic shapes tested to international building codes.

✓ 100% Pure Acrylic Resin ✓ Bend Radius Down to R50mm ✓ ASTM E84 Class A Fire-Rated ✓ Zero-Seam Inconspicuous Jointing

Executive Takeaway

Three Conclusions, Stated Up Front

Never settle for 100% acrylic on flat surfaces only

Modified acrylics can mimic the flat look, but only pure acrylic solid surface allows deep-draw thermoforming without surface whitening, structural micro-fissuring, or thermal stress memory.

Curvature must not sacrifice durability

Our heated and molded curved pieces retain a minimum Barcol hardness of ≥ 58, maintaining the exact same stain resistance, scratch tolerance, and commercial wear longevity as standard slabs.

Right recipe replaces guesswork

We combine high-grade PMMA with refined ATH powder under precision CNC vacuum thermoforming at 160°C–170°C, guaranteeing consistent curvature across entire production batches.

Empirical Validation

Every Claim Backed by a Number and a Standard

Property	Standard / Specification	What the Data Says
Resin Matrix Purity	FTIR Spectrometry / Formulation Assay	100% Pure Acrylic (PMMA) + ATH, 0% calcium carbonate fillers
Thermoforming Temperature	Calibrated Thermal Oven Profile	Pliable at 160°C – 170°C; heat-distortion point ≥ 100°C
Minimum Bending Radius	CNC 3D Vacuum Former (12mm sheet)	R ≥ 50 mm (Down to R30mm with specialized customized molds)
Post-Bending Surface Whiteness Check	Delta E (ΔE) Colorimeter Inspection	ΔE < 0.5 — Zero whitening, hazing, or surface micro-fissuring
Surface Hardness After Bending	ASTM D2583 (Barcol Impressor)	Barcol Hardness ≥ 58 (Matches unbent native flat sheet hardness)
Flame Spread / Smoke Index	ASTM E84 Standard Surface Burning	Class A Fire Rating (FSI ≤ 15, SDI ≤ 30)
Joint Tensile Shear Strength	ASTM D1002 Bond Line Test	> 28 MPa (> 90% of virgin base material tensile strength)

Why pure acrylic resin cannot be substituted

Lower-grade modified solid surface incorporates polyester resins and calcium carbonate. Under bending stress, polyester chains rupture and turn chalky white along the radius, permanently ruining the aesthetic finish.

Bespoke thermoform tooling is our core asset

Standard shops only bend simple single-axis curves. Foshan Kangyi builds precision CNC male/female molds and utilizes membrane vacuum presses to execute compound 3D double-curved forms, twisted organic ribbons, and multi-faceted contours.

Value engineering warning: so you don't get burned elsewhere

Competitors frequently quote prices based on modified acrylic slabs, then cut corners during high-temperature forming. Ensure your specification explicitly requires 100% PMMA resin with SGS physical test validation.

Material Comparison Matrix for Curved Applications

Capability	Kangyi Pure Acrylic	Modified Acrylic	Cast Quartz / Marble
Thermoforming capability (R < 100mm)	Yes (Down to R50mm)	Risk of cracking	No (Brittle)
Surface whitening when bent	No (ΔE < 0.5)	Severe whitening	Not applicable
Seamless molecular jointing	100% Inconspicuous	Visible hairline line	Visible grout joint (> 2mm)
Water Absorption (ASTM D570)	0.03% (Non-porous)	> 0.08%	0.05% – 0.20%
Fire Rating (ASTM E84)	Class A Certified	Class B / Class C	Class A

Where the Numbers Come From

ASTM E84 Surface Burning Characteristics: Tested in certified environmental chambers measuring flame propagation (FSI ≤ 15) and smoke evolution (SDI ≤ 30).
ASTM D2583 Barcol Hardness: Measured using a calibrated Model 934-1 impressor directly across thermoformed crests and flat transitions.
ASTM D1002 Tensile Lap-Shear: Performed across CNC joint seams treated with Kangyi color-matched acrylic adhesive after 24h room cure.
ASTM D570 Water Immersion Assay: 24-hour continuous submersion test indicating ≤ 0.03% weight increase, preventing internal moisture penetration.
SGS & Intertek Independent Verification: Full laboratory dossiers available upon project NDA or specifier request for international architectural tender compliance.

Manufacturing Excellence

The Supplier Behind the Evidence

15+

Years in Solid Surface

Dedicated strictly to high-purity acrylic research and bespoke custom fabrication.

30,000+ ㎡

Modern Plant Capacity

Equipped with high-precision CNC routers, 3D vacuum presses, and curing lines.

1-Stop

CAD / 3D to Jobsite Fit

From shop drawing engineering and mold carving to dry assembly trial runs.

80+

Global Export Markets

Trusted by commercial hospitality chains, luxury villas, and healthcare projects.

Curated Portfolio

Explore our collection of custom-shaped solid surfaces, from artistic curves to monolithic functional spaces.

Organic Flow Desk

A seamless reception desk featuring complex compound curves and fluid lines.
3D Wave Walls

Textured wall panels mimicking the flow of water or sand dunes.
Monolithic Bench

Free-standing sculptural seating that functions as art.
Integrated Vanity

One-piece vanity top and sink with no visible joints or crevices.
Twisted Stone Vase

Avant-garde vase design achieved through extreme thermoforming techniques.

Custom-Shaped Solid Surface — FAQ

What is the minimum radius possible for thermoforming? +

For standard 12mm thickness pure acrylic sheets, the standard safe bending radius is R ≥ 50 mm. For tighter requirements (down to R30 mm), we customize specific internal CNC compression dies or calibrate localized heat-soaking protocols without cracking.

Will the color or pattern alter across the curved stretch? +

No. Pure acrylic matrix retains consistent particulate dispersion. Solid colors stay perfectly uniform (ΔE < 0.5), and our proprietary vein series is optimized to prevent graphic distortion or streak tearing during tensile bending.

Can large reception desks be shipped in single pieces? +

Depending on container shipping limits (typically max 5.8m for 20GP or 11.8m for 40HQ), oversized organic counters are modularized with tongue-and-groove joint guides. We provide matching adhesive and step-by-step videos so jobsite joints can be buffed completely invisible.

What CAD files do you need for a quick quotation? +

We accept .DWG, .DXF, .STP, .IGS, Rhino (.3DM), or SketchUp (.SKP) files. Our engineering department reviews curvatures, specifies internal steel frameworks if required, and returns a detailed quotation within 24 business hours.

Ready for Fabrication

How to Decide in One Sentence

“If your design requires organic curves without seams, zero discoloration, and commercial fire-rated compliance, specify 100% pure acrylic solid surface from Foshan Kangyi.”

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