GR4 is a sandwich panel with a cosmetic finish consisting of a thin slab of granite (4 mm). It has an aluminium honeycomb core and skins made of glass fibre fabric. It is obtained by gluing a granite finish slab to a panel without finish such as the RAWCELL® Fiber panel. Main fields of application: construction, furniture, shipbuilding, lifts.
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1) INTERNAL CORE
aluminium honeycomb
(Starcell production)
aluminium alloy: 3000 series
density: 29 - 50 - 56 - 65 - 80 kg/m³
cell diameter:
6.35 mm (standard);
10 - 12.7 - 19 mm (on request)
2) ADHESIVE
thermoplastic
(Starcell formula)
3) EXTERNAL SKINS
glass fabric impregnated with epoxy resins
(dry fabric weight: 500 g/m² per side)
4) FINISHING
granite slab
thickness 4 mm
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| PRODUCT ID CODE | ||||||||
| Code structure | Value in this sheet | Meaning | ||||||
| LITHOCELL® | family to which the product belongs | |||||||
| Natural Stone | subfamily to which the product belongs | |||||||
| GR4 (n/n)(n-n) | panel type | |||||||
| GR4 (n/ )( ) | 6,35/ = | size (mm) of the hexagonal honeycomb cell | ||||||
| GR4 ( /n)( ) | /n = | panel thickness (mm) | ||||||
| GR4 ( / )(n-n) | 0,5 - 0,5 | thickness (mm) of the two skins | ||||||
| S(n) | 8 = | standard dimensions (mm) - S(8) = 1.250 X 3.050 | ||||||
| CHARACTERISTICS OF MATERIALS AND COMPONENTS | ||||||||
| Front finishing layer | ||||||||
| material: | granite slab | |||||||
| standard thicknesses (mm): | 4,0 | |||||||
| surface appearance: | smoothed - bush-hammered | |||||||
| standard adhesive: | epoxy film | |||||||
| Structural skins | ||||||||
| material: | glass fibre roving fabric | |||||||
| type: | (dry weight 500 g/m² - 600 tex) | |||||||
| standard thicknesses (mm): | 0,5 | |||||||
| impregnation: | epoxy resin (Starcell formula) | |||||||
| surface appearance: | raw | |||||||
| standard adhesive: | thermoplastic film (Starcell formula) | |||||||
| on request adhesive: | epoxy film | |||||||
| Hexagonal cell honeycomb | ||||||||
| material: | aluminium foil | |||||||
| type: | 3000 series alloy | |||||||
| foil thicknesses (µm): | 60 - 70 | |||||||
| density (kg/m³): | 29 - 50 - 56 - 65 - 80 | |||||||
| standard cell sizes (mm): | 6,35 - 10 - 12,7 - 19 | |||||||
| PHYSICAL AND DIMENSIONAL CHARACTERISTICS OF THE PANEL | ||||||||
| Dimensions | ||||||||
| standard (mm): | S(9) = 1.270 X 2.550 - S(13) = 1.550 X 3.050 | |||||||
| special (mm): | maximum width: 1.550 - maximum length: 4.300 | |||||||
| tolerance (mm): | ± 1 (squared panels) | |||||||
| Thicknesses | ||||||||
| standard (mm): | 5 | 10 | 12,7 | 15 | 20 | 25 | 30 | |
| special (mm): | from 4 to 60 | |||||||
| tolerance (mm): | ± 0,3 | |||||||
| Weights* | ||||||||
| weights referred to standard thicknesses (kg/m²): | 3,06 | 3,39 | 3,56 | 3,71 | 4,04 | 4,36 | 4,69 | |
| tolerance (kg/m²): | ± 0,2 | |||||||
| *The weights refer to panels with the following characteristics: | cell size (mm): 6,35 | |||||||
| foil thickness (µm): -- | ||||||||
| thickness of the skins (mm): 0,5 | ||||||||
| MECHANICAL CHARACTERISTICS OF THE PANEL | ||||||||
| The characteristics of this sheet refer to the following type of panel: | ||||||||
| LITHOCELL® Natural Stone - GR4 (6,35/n)(0,5-0,5)S(8) | ||||||||
| Starcell's Technical Department will gladly work with customers to determine the features of other panel configurations | ||||||||
| Type | Standard | Characteristic value | ||||||
| standard thicknesses | - | 5 | 10 | 12,7 | 15 | 20 | 25 | 30 |
| maximum load* (N): | DIN 53293; EN 14125 | 251 | 479 | 515 | 1.583 | 2.140 | 2.692 | 2.338 |
| deflection at Max* load (mm): | DIN 53293; EN 14125 | 11,42 | 4,41 | 6,12 | 8,86 | 8,18 | 13,01 | 12,59 |
| resistance to peeling* (N): | DIN 53295 | > 130 (min.) - >350 (average) | ||||||
| compressive strength* (Kg/cm²): | UNI 4913 | 21,97 ± 10 | ||||||
| elasticity modulus (E)* (N/mm²): | DIN 53293 | 14.460 | 16.130 | 12.169 | 18.817 | 23.777 | 30.062 | 36.341 |
| moment of inertia (I)* (mm⁴): | DIN 53293 | 253 | 1.128 | 2.363 | 3.942 | 9.506 | 14.555 | 18.758 |
| operating temperature (°C): | - | from -40°C to +80°C | ||||||
| maximum distributed load** (Kg): | - | 450 | ||||||
| deflection**(mm) for a distributed load of: 300 kg | - | 5,00 | ||||||
| (*) values obtained by Starcell's Internal Laboratory. | ||||||||
| (**) value obtained on a panel held on 4 sides: | size (mm): 1.000 X 1.000 | |||||||
| thickness (mm): 20 | ||||||||
| cell size (mm): 6,35 | ||||||||
| CERTIFICATIONS | ||||||||
| Type | Standard | Sector | Class | |||||
| fire behaviour of the honeycomb | ISO 1182 | 0 | ||||||
| PROPERTIES | ||||||||
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| FIELDS OF APPLICATION | ||||||||
| Typical applications for the LITHOCELL® Natural Stone - GR4 panel include building façades, interior design and lift systems. | ||||||||
| STORAGE | ||||||||
| The LITHOCELL® Natural Stone - GR4 panel is a product in the “semi-finished products” category and therefore is subject to further processing; we recommend storing the panels horizontally in a closed and dry environment, possibly away from heat sources and to support them along their edges. | ||||||||
| SAFETY DATA SHEETS | ||||||||
| On request, safety data sheets for this product are available in Italian or English. For more information, please visit: www.starcellspa.com. | ||||||||
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