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NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Sächsisches Textilforschungsinstitut e.V.
an der Technischen Universität ChemnitzSaxon Textile Research Institute at the Chemnitz University of Technology
Annaberger Straße 24009125 Chemnitz
Managing Director:Dipl.-Ing.-Ök. Andreas Berthel
Phone: +49 3 71 52 74-0 E-Mail: [email protected]: +49 3 71 52 74-1 53 Internet: www.stfi.de
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
12 Month Meeting
WP2 Update on Nonwoven Textiles
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
WP2 – Knowledge base
end of WP2
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
WP2 – Knowledge base
WP Leader: NTUADuration: M4 (04/10)– M16 (04/11)Involved partners: DAPP, Imprima, NOTT, Nanophos, Boerner, STFI, NTUA, TNO
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
WP2 – Knowledge base
3 Subtasks:
T 2.1/TNO D2.1 (M16/TNO)
Micro-encapsulation of functional agents (PCMs, self-
healing agents)
T2.2/STFI D2.2 (M16/STFI)
Nonwoven textile matrices
T2.3/NTUA D2.3 (M16/NTUA)
Waterproof and reflective coatings (incl. biobased oils
and waxes plus nano particles)
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Two approaches
Approach 1: Bitumen + reflective impregnated textile layer on top
Approach 2: Newly developed roofing material with reflective coating, on top and PCMs and Arginotec in the intermediate layer
Structure for approach 2
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Type of needed nonwoven layers
1. Top layer:• Thin nonwoven layer impregnated with top coat
including functional additives ensuring a high solar
reflectivity or self cleaning• Prefabricated material to be laminated on the roofing
layer• Needed for approach 1 and approach 2
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Type of nonwoven layers
2. Functional/Intermediate layer:• 3D textile matrix membrane with adhesive layer
impregnated with an emulsion (bitumen and/or
polymer) including functional materials/fillers to
improve for instance flame retardancy or to heal
small damages • Top coat layer and functional layer are separated and
have to be combined • Needed for approach 2
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Delivery of nonwoven samples
Overview on sample deliveries for top coat layer and functional/intermediate layer done by STFI:
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
Activities: Production of hand samples coated by NTUA/TNO with acrylic paint Vivecryl (from NANOPHOS) and Encryl (from Boerner)
Tests:
1.Thermal behaviour
2.Thermal conductivity Results are presented by NTUA
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
3. Water permeability:
Step 1: Testing the original material hydrostatic pressure test according DIN EN 20811
Step 2: Abrasion test DIN EN ISO 12947 Martindale device
Step 3: Testing the Resistance to water penetration after abrasion treatment see step 1
Results: Mechanical influences such as abrasion increase the water permeability of coated material Sealing the top layer at first with Encryl at the back side delays water penetration
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
4. Reflexion degree:
Reflexion coefficient is measured by a spectral photometer (type: Lambda 900 of company PERKIN Elmer Corp./USA with 150 mm integrated sphere and 8° inclination of sample surface to the light incidence axis) According to European standard EN 410 (reflexion, transmission and absorption of visible light and global radiation)
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
4. Reflexion degree:
Light reflexion degree is the share of sun radiation in the range of visible light which is reflected.
Solar reflection degree is the share of sun radiation of the entire wave length range which is reflected.
Results: the values for light reflexion are between 0,63 and 0,82 the values for solar reflexion are between 0,72 and 0,90
Following the conceptual design and the data from standards a IRvalue of 0,8 is required.
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
Activities: After identifying a suitable material the nonwoven was coated at STFIs lab scale coating plant
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Top coat layer
Results:Most suitable material for top coat layer samples are spunbond nonwovens thermally bonded (very thin)Coating at first the backside with Encryl prevents a penetration of Vivecryl to save acrylic paint A suitable technology for coating is slop padding (kiss roll) to guarantee an even distribution of the top coat
Next activities:Top coat layer coated at the lab scale plant was sent to NTUA and TNO for testing STFI works on improving the evenness in applying the coating agents
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Functional/intermediate layer
Activities:Production of hand samples sent to TNO for coatingMaterials were coated with aqueous suspensions of acrylates or stabilised bitumen to be combined with suspensions of Arginotec and/or encapsulated PCM’s and testedDifferent deliveries to identify the most suitable materialClose cooperation with TNO to determine the most suitable material
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Functional/intermediate layer
Results: Good results in impregnation is only possible if the nonwoven material is hydrophilic enough, has a good wet ability and does not contain too many small air pocketsLow density and thickness up to 4.5 mm deliver good impregnation results Spunbond nonwovens are very thin and not suitable for coating with aqueous suspension Suitable materials related to thickness and density are needle-punched nonwovens with an mass per unit area around 400 g/m² and thermally after-treated to smooth the surface
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Next activities:
Evaluation of sample delivery sent by end of November to TNO Identification of most suitable nonwoven materialAfter identifying the best material, production of more nonwoven material at lab scale plant
Functional/intermediate layer
Equipment for production of needle-punched nonwovens
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Summary activities of STFI…
…in project year 1:
• Top coat layer:• Nonwoven production• Coating trials• Testing (water permeability, reflexion
degree)
• Functional layer:• Nonwoven production• Testing (water permeability, reflexion
degree)
NU-ROOF 12 Month Meeting Chemnitz 14/15 December 2010
Summary meetings…
…with STFI participation in project year 1
Meeting Location Date
Kick-off meeting Genova (IT) 03.02.2010
Kick-off meeting WP2 Athens (GR) 13.04.2010
Technical meeting with TNO, Boerner, NOTT
Chemnitz (DE) 12.05.2010
6 Months Meeting Roma (IT) 17.06.2010
Technical meeting with NTUA, DAPP, TNO, NOTT, Boerner
Bad Hersfeld (DE) 30.09.2010
12 Months Meeting Chemnitz (DE) 14./15.12.2010
