Roofing Material
For the roofing material sector DiloGroup offers special webforming, consolidation, drafting and needling technology in order to produce specific strength characteristics.
Needlefelts impregnated with bitumen are used as sheetings for sealing roofs. The use of needlefelt improves flexibility and tear resistance. In this case, needlefelts of glass, polyester or polyester filaments are used, but also needlefelts using a glass mesh or multilayer needlefelt constructions, which improve the stability of the roof sheeting.
- long service life
- dimensional stability
- isotropy (MD/CD = 1 to 1,6)
- temperature resistance
- tear resistance
The carrier needlefelts for roofing sheets are produced in a card/crosslapper or a spunbond line. After web forming in an extrusion line, consolidation is carried out by several needlelooms. Reinforcing meshes can be included in felts made of staple fibre by using the Dilo HyperTex technology. This technology uses a scrim fabric machine of Messrs. OnTec which places the scrim on, underneath or between preneedled layers.
The layers are subsequently needled. This technology saves a further step required for the production of the scrim, is highly productive and very flexible regarding fibre material and mesh sizes. The felt can then be chemically consolidated before impregnation with bitumen.