Komacel Skin Foam Sheet, High Insulation Resistance

Kömacel is an integral skin-foam sheet made of rigid PVC according to the Celuka process. Its positive characteristics make a multitude of applications possible. Practical experience has proven its quality.

Characteristics

• fine-celled foam structure
• firm, smooth outer skin of up to 2 mm thickness
• surface with silk gloss finish
• homogeneously colored

Advantages

• high flexural strength
• low weight
• low thermal conductivity, high insulation resistance
• absorption of vibrations
• resistant to chemical substances and non-corroding
• weatherproof and light-fast
• low absorption of water, no rot
• particularly easy workability
• low flammability, fire behavior according to UL94-V0 thickness 4 mm
• smooth surface, ideal for printing
• very suitable for bonding
• ready for indoor and outdoor use without pre-treatment

Areas of application

• Advertising - Signs, displays, decoration of shop windows, exhibition stands

• Building sector - Shop fitting, interior decorating, for rooms where resistance of humidity is required (bathrooms etc.), air-conditioning and ventilation systems, heat and sound insulation, cladding, window and parapet elements, roller shutter boxes, door panels
• Electrical industry - Control cabinets, channels for cables and wires, control panels

• Miscellaneous - For containers, apparatus, models, equipment for photographic laboratories, electroplating, signs on building sites, shelves and table tops in laboratories

Properties

Examination method

Unit

Values 4,5,6 mm

Values

8,10,13 mm

Values

19,24,30 mm

Mechanical properties

*(Apparent) Density

DIN 53 479

g/cm3

0.85

0.55-0.60

Tensile strength

DIN 53 455

N/mm²

Elongation at tear

DIN 53 455

Flexural strength

DIN 53 452

N/mm²

Compressive strength (range of elasticity)

DIN 53 421

N/mm²

3.5

Compressive stress for a compressive strain of 30%

DIN 53 421

N/mm²

5.5

Modulus of elasticity

DIN 53 457

(similar to)

N/mm²

1100

850

1100

Impact strength at + 20C

DIN 53 453

kJ/m²

0°C

DIN 53 453

kJ/m²

- 20°C

DIN 53 453

kJ/m²

Ball pressure hardness

DIN 53 456

N/mm²

Shore hardness D

DIN 53 505

The missing values of Kömacel - 19/24/30 mm - cannot be determined in conformity with the standards by applying measurem, techn.

Thermal properties

Vicat softening temperature

DIN 53 460

°C

Temp. of deflexion under load acc. to ISO/R 75 (HDT)

DIN 53 461

°C

Coefficient of linear thermal expansion

(from -30°C to +50°C)

DIN 53 752

mm/m °C

0.08

Thermal conductivity (from 0°C to +60°C)

DIN 53 616

W/mK

0.10

----0.05 - 0.07----

* u-value (rate of heat transfer)

DIN 52 616

W/m²K

10 mm	13 mm	19 mm	24 mm	30 mm
app. 3.0	2.6	2.13	1.9	1.58

The missing values of Komacel - 19/24/30 mm - cannot be determined in conformity with the standards by applying measurem. techn.

Electrical properties

Surface resistance

DIN VDE 0303 T3 ohm

>1·10¹⁴

3.7·10¹⁴

7.0·10¹⁴

Volume resistivity

DIN VDE 0303 T3 ohm*cm

4·10¹⁵

4.4·10¹⁵

6.0·10¹⁵

Dielectric strength

DIN VDE 0303 T2 kV/cm

100

Dielectric constant E

DIN 53 484 T2

2.4

1.9

1.8

Dielectric dissipation factor

DIN 53 483 T2

0.013

0.0084

Tracking resistance

DIN IEC 112

CTI 600

Other properties

Valued sound insulation measure R_w

DIN 522120/84

10 mm	13 mm	19 mm	24 mm	30mm
app. 3.0	2.6	2.13	1.9	1.58

Water absorption after 7 days

DIN 53 495

> 0.2

app. 0.2

Fire behavior

DIN 4102 (D)

B 1 (Color 654, thickn. 4,5,6,10 mm)

NFP 92-501 (F)

M 1 (Color 654, thickn 4,5,6,10 mm)

BS 476, Part 7, 1971 (UK)

Class 1 (Color 654, thickn. 4mm)

UL 94 (USA)

VKF (Switzerland)

5.3

Italia (I)

Class 1

Class 1 (Color 654, thickn. 10mm)

Allowable for contact with foodstuff

-----------------NO----------------

Kömacel sheets can be easily and quickly worked with standard tools and machinery used in the timber and metal-processing industries. They can be cut, sawn, turned, filed, drilled, planed, milled, screwed and polished. The tools must be sharp in order to prevent breaking and splitting. High cutting speed, low forward feed and low rate of cut should generally be used. Normally it is not necessary to cool the cutting tools, in special cases compressed air is sufficient.

Deep-drawing and blowing of Kömacel sheets is only possible up to a certain extent. The same applies to bending and folding.

Kömacel sheets can be welded according to the usual welding procedures; however, extreme care must be taken, since the foam might collapse.

Kömacel sheets can be bonded with other Kömacel sheets or with different rigid PVC materials. Depending on the requirements and the type of application, different adhesives can be used. For bonding Kömacel sheets with other Kömacel sheets, adhesives containing solvents as well as solvent-free polyurethane adhesives are suitable.

Due to their smooth surface, Kömacel sheets can be easily printed, painted and lacquered. They are especially suitable for screen printing, for which special inks are used (the surface of the PVC is slightly etched, thus ensuring good adhesion. Ray-hardened inks are now also used; this process could, however, cause discoloration of the unprinted surfaces). The surface to be printed must be clean and free from grease.

Due to high absorption of heat, the printing of large surface areas with dark colors should be avoided when the sheets are exposed to direct sunlight.

Kömacel sheets are made of thermoplastic PVC and, therefore, vary more in length than wood or metal working materials (please note the coefficient of linear thermal expansion).

When installing screen-printed advertising boards in cricket or soccer stadium, or when fixing curtain-walling and cladding, a possible expansion of the sheets has to be taken into account.