The invention embodies an apparatus for producing resin tubes, the apparatus having a hollow supporting structure, wherein an endless carrier strip is windable around the outside of the supporting structure in a plurality of adjacent windings to form a mould.
B29C 53/74 - Winding and joining, e.g. winding spirally helically using a forming surface in the shape of an endless belt which is recycled after the forming operation
B29C 53/58 - Winding and joining, e.g. winding spirally helically
2.
Liner reinforced by non-woven fibres for impact resistant GRP pipes
The invention relates to a glass-reinforced plastic pipe liner of improved impact performance comprising layer B) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by non-woven fibres. Layer B) comprises colour pigments at 0.2-5.0 wt %. The invention provides flexible liners for pressure and non-pressure GRP pipes. It improves impact performance of the pipe liner whilst offering also improvements in abrasion resistance, water-jet resistance for high pressure cleaning without liner damage, increased expected lifetime by improved resistance to internal pressure and permits pigmentation of the liner. The invention also encloses a process for producing the glass-reinforced plastic pipe liner.
C09D 167/06 - Unsaturated polyesters having carbon-to-carbon unsaturation
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
The invention embodies an apparatus (20) for producing resin tubes, the apparatus (20) having a hollow supporting structure (4), wherein an endless carrier strip (8) is windable around the outside of the supporting structure (4) in a plurality of adjacent windings to form a mould. The invention additionally relates to a method of producing resin tubes using said apparatus.
B29C 53/58 - Winding and joining, e.g. winding spirally helically
B29C 53/74 - Winding and joining, e.g. winding spirally helically using a forming surface in the shape of an endless belt which is recycled after the forming operation
The invention embodies an apparatus (20) for producing resin tubes, the apparatus (20) having a hollow supporting structure (4), wherein an endless carrier strip (8) is windable around the outside of the supporting structure (4) in a plurality of adjacent windings to form a mould. The invention additionally relates to a method of producing resin tubes using said apparatus.
B29C 53/74 - Winding and joining, e.g. winding spirally helically using a forming surface in the shape of an endless belt which is recycled after the forming operation
B29C 53/58 - Winding and joining, e.g. winding spirally helically
The invention relates to a glass-reinforced plastic pipe liner of improved impact performance comprising layer B) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by non-woven fibres. Layer B) comprises colour pigments at 0.2 5.0 wt%. The invention provides flexible liners for pressure and non-pressure GRP pipes. It improves impact performance of the pipe liner whilst offering also improvements in abrasion resistance, water-jet resistance for high pressure cleaning without liner damage,increased expected lifetime by improved resistance to internal pressure and permits pigmentation of the liner. The invention also encloses a process for producing the glass-reinforced plastic pipe liner.
A rain overflow basin for collecting and storing rainwater, mixed water, or wastewater, has an inflow, an outflow, a basin chamber, a basin spillway, which is equipped with a weir threshold and is connected downstream of the basin chamber. A drain discharges the basin spillway, and a purification device purifies water flowing from the basin chamber to the basin spillway. A retention wall between the basin chamber and the basin spillway dams up water accumulating in the basin chamber. Water draining from the basin chamber is dammed up in a storage space is between the retention wall and the weir threshold, to reach the basin spillway via the weir threshold. The retention wall includes a passage opening. A purification device extends into the basin chamber such that water draining from the basin chamber through the passage opening into the storage space flows through the retention element.
The invention relates to a glass-reinforced plastic pipe liner of improved impact performance comprising layer B) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by non-woven fibres and a layer C) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by chopped fibre strands. At least one of these layers B) or C) comprises colour pigments at 0.2 –5.0 wt%. The invention provides flexible liners for pressure and non-pressure GRP pipes. It improves impact performance of the pipe liner whilst offering also improvements in abrasion resistance, water-jet resistance for high pressure cleaning without liner damage, increased expected lifetime by improved resistance to internal pressure and permits pigmentation of the liner. The invention also encloses a process for producing the glass-reinforced plastic pipe liner.
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 63/26 - Lining or sheathing of internal surfaces
B29C 63/34 - Lining or sheathing of internal surfaces using tubular layer or sheathings
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