9 mm FLEXIBLE PET Felt Acoustic Panels – the Bendable Acoustic Panel for Columns, Curves, and Contoured Shapes
The vitAcoustic FLEXIBLE PET felt acoustic panel is based on our proven 9-mm panel and made bendable with precise CNC V-Cut incisions. The V-Cuts are cut to leave approximately 0.5 mm of material – this allows the panel to bend and conform to round columns, curved walls, and curved furniture fronts without visible creases or joints.
The V-Cut can serve either of two purposes: a visible design feature – the V-groove is exposed on the front as a texture – or a concealed incision on the back, leaving the visible surface smooth. Depending on the V-Cut variant and incision spacing, different bend radii are possible: from gentle curves with large radii to tight curves for columns and tambour door mats. The cutting direction (lengthwise or crosswise) determines the bending direction.
V-Cut Variants for Bending
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0° concealed – incision from the back, leaving the surface smooth; bendable in only one direction. Spacing of 15 or 35 mm.
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30° V-Cut – visible V-groove as a design feature, bendable in both directions. Spacing of 15 or 35 mm.
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45° V-Cut – wider V-groove for tighter bending, bendable in both directions. Spacing of 22 or 35 mm.
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15° and 22.5° – additional angles available on request (tools available).
Closer incision spacing (15 mm) allows tighter radii – ideal for narrow columns and tambour door mats. Wider spacing (35 mm) is suitable for gentle curves and large rounded forms. Custom spacing to your specifications is also possible.
Typical Applications
- Column cladding and pillar wraps – seamlessly rounded, without visible joints
- Curved wall cladding and undulating 3D shapes in hotels, restaurants, and reception areas
- Round and organically shaped room dividers and partitions
- Curved furniture fronts: counters, cylindrical storage units, reception desks
- Tambour and roll-up door mats for furniture, cabinets, and sideboard closures
- Round columns and curved walls that cannot be clad with flat panels
- Flexible acoustic partitions and mobile room dividers
Acoustic Performance (Tested to ISO 354, Rated to DIN EN ISO 11654)
Acoustically, the FLEXIBLE panel is essentially equivalent to the flat 9-mm panel. The V-Cut grooves increase the surface area and scatter sound (diffusion) – this reduces flutter echoes and tends to produce a slightly more uniform effect. We specify the weighted sound absorption coefficient αw and the NRC value:
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Directly on the wall: αw 0.25 / NRC 0.30 – Class E
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50 mm air gap: αw 0.55–0.60 / NRC 0.65 – Class D–C
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100 mm air gap: αw 0.75 / NRC 0.75 – Class C
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150 mm air gap: αw 0.80 / NRC 0.80 – Class B
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Nonwoven composite or ceiling cloud: Sound absorption class A
A practical advantage of curved installation: cladding columns or curved walls almost always creates a cavity behind the panel – an air gap that further increases absorption. The FLEXIBLE panel thus helps reduce reverberation time in accordance with DIN 18041, particularly where flat panels cannot be installed.
All classes and performance values refer to the mounting condition specified; measured values according to ISO 354, rated according to DIN EN ISO 11654.
Certificates and Standards
Tested for harmful substances and low-emitting: Our PET acoustic panels are GREENGUARD Gold certified (UL 2818) and meet stringent limits for indoor chemical emissions. Formaldehyde emissions are well below the requirements that apply throughout the EU from August 6, 2026 (REACH Annex XVII). The materials are also tested for substances of concern to human health according to OEKO-TEX Standard 100.
Fire protection even when freestanding: The 9-mm PET felt achieves class B-s1,d0 (flame-resistant, EN 13501-1, TÜV SÜD) even in freely suspended or freestanding applications – without attachment at the back – relevant for ceiling clouds, baffles, and room dividers.
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Flame-resistant according to EN 13501-1 (B-s1,d0) – TÜV-SÜD-tested, corresponds to fire class B1 according to DIN 4102
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OEKO-TEX Standard 100 – tested for harmful substances, suitable for preschools, schools, and clinics
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Greenguard Gold – low VOC emissions for healthy indoor air
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EPD (Environmental Product Declaration) – relevant for DGNB and LEED certification
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SCS Recycled Content – certified recycled content
Colors, Availability, and Delivery Time
Our PET colors are divided into four collections – these determine the stock location, minimum quantity, and delivery time, depending on color and material thickness (the same color may belong to a different collection depending on thickness). The collection is included in the item number; you can see the current stock level, delivery time, and minimum order quantity for each item directly in the “PET Color” selection field.
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Standard & Trend: over 30 colors continuously stocked at our warehouse in Germany and regularly replenished – available from 1 panel, with smaller quantities generally delivered in just 1–2 weeks, including cutting to size and processing
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Extended: also available from 1 panel, with a delivery time of approx. 6 weeks (rail freight). We stock several thousand panels in selected colors and thicknesses in Germany, and many times that number at our production site – because changing over PET production involves high setup costs, it is only economical in large quantities. This inventory investment is supported by the global market, not Europe alone; it enables us to offer the full range of colors and thicknesses
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Production: manufactured specifically for your project – from approx. 300 panels (in some cases from just 200). We can start a batch at any time, match any desired color, and supply custom sizes; production runs continuously at a width of 244 cm, with cut positions across the width and along the length freely selectable
Fast delivery including cutting to size and processing is one of our strengths – especially for projects with tight deadlines.
Material and Manufacturing
The FLEXIBLE panel is made from recycled PET plastic bottles that are processed into textile fibers and laid into a fiber web using a felting process. This web is thermally bonded: a proportion of blended-in PET melt-bonding fibers (bicomponent fibers) partially melts in the oven and fuses the structure into a dimensionally stable panel – entirely without chemical adhesives or binders. Only the precise V-Cut incisions make this rigid panel bendable in the intended direction. The recycled content is certified by SCS Global Services.
- High areal weight (1.9 kg/m²) – densely compressed yet bendable along the V-Cuts
- Unaffected by moisture and water-resistant
- Resistant to mold, pests, and dust mites
- Suitable for allergy sufferers – no volatile constituents
- Fully recyclable at the end of its service life
Processing and Installation
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Adhesive bonding: UHU Polymax High Grip, UHU por contact adhesive, or double-sided adhesive tape (CT-S 5735)
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Screws and staples: particleboard screws, staples
- For installation on curved surfaces, we recommend contact adhesive for a durable, full-surface bond
Cleaning and care: vacuum like textile coverings or wipe with a damp cloth. Stubborn grease stains can be dissolved with a little thinner, and coffee or wine stains can be bleached with hydrogen peroxide (H2O2) – without damaging the PET fiber or color.
Technical Properties
| Property |
Value |
| Construction |
9-mm PET felt, thermally bonded (melt-bonding fibers), made bendable by CNC V-Cut incisions leaving ~0.5 mm of material |
| Material |
PET felt made from recycled PET bottles, thermally bonded – without chemical binders |
| Thickness |
9 mm (base material) |
| Areal weight |
1.9 kg/m² |
| Acoustic function |
Porous broadband sound absorber; V-Cut grooves additionally scatter sound (diffusion) |
| Sound absorption class |
E directly mounted · D–C (50–100 mm) · B (150 mm) · A as a nonwoven composite or ceiling cloud |
| αw |
0.25 (directly mounted) · 0.55–0.60 (50 mm) · 0.75 (100 mm) · 0.80 (150 mm) · according to DIN EN ISO 11654 |
| NRC |
0.30 (directly mounted) · 0.65 (50 mm) · 0.75 (100 mm) · 0.80 (150 mm) |
| V-Cut variants |
0° concealed · 15° · 22.5° · 30° · 45° |
| Incision spacing |
15 / 22 / 35 mm or custom |
| Cutting direction |
Lengthwise or crosswise selectable (determines the bending direction) |
| Surface texture |
V-Cut visible (design feature) or concealed (back); UV printing also available |
| Color configuration |
50+ design colors in stock; custom colors from 300 panels |
| Made to measure |
CNC cutting to size from a 2440x1220x9 mm raw panel |
| Fire classification |
Flame-resistant B-s1,d0 according to EN 13501-1 (TÜV SÜD; corresponds to DIN 4102 B1) |
| Recycled content |
Recycled PET, content certified by SCS |
| Environmental declaration |
EPD (relevant for DGNB/LEED); GREENGUARD Gold (UL 2818, below the REACH emission limit) |
| Harmful substance testing |
OEKO-TEX Standard 100 |
| Care |
Vacuum / wipe with a damp cloth; remove grease with thinner, bleach coffee/wine stains with H2O2 (without damaging the material) |
Samples, Data Sheets, and Shipping
Free color samples are available in the Samples and Miscellaneous category. Technical data sheets, absorption values, and certificates are available in our download section. Shipping: small items and cut-to-size pieces by parcel service (provided combined length and girth and weight are within limits), larger orders and whole panels as palletized freight via freight forwarder.
Planning a project or need custom sizes? Call us at +49 7248-93566-90 or email [email protected] – we manufacture to your specifications.
