摘要:
In order to produce a good cross-laminated film structure with a reduced, predetermined connection between the plies, or in order to produce a tubular product whose cooling can be more precisely controlled and which is stiffer, a unitary tubular product having an inner layer 9 and an outer layer 10 connected together by a bi-planar mesh formed of helical ribs 13, 14 bonded at their cross-over points 15 is produced in a single coaxial tubular extrusion process, the structure being integrally or confluently extruded. The extruder die head has annular flow channels 7, 8 having closely-spaced die grooves 7b, 86.
摘要:
In order to produce a good cross-laminated film structure with a reduced, predetermined connection between the plies, or in order to produce a tubular product whose cooling can be more precisely controlled and which is stiffer, a unitary tubular product having an inner layer 9 and an outer layer 10 connected together by a bi-planar mesh formed of helical ribs 13, 14 bonded at their cross-over points 15 is produced in a single coaxial tubular extrusion process, the structure being integrally or confluently extruded. The extruder die head has annular flow channels 7, 8 having closely-spaced die grooves 7b, 86.
摘要:
In order to increase coefficients of friction and thereby enable steeper slopes and increased capacity to be provided in a waste containment landfill enclosure 1 with a side wall and base lining system 2 and a cover lining system 3, the lining systems have a geomembrane 4, 6, 16 in contact with a geonet 5, 7, 17 and a geonet 7, 17 in contact with a geotextile 8, 18. The geomembranes 4, 6, 16 and the geonets 5, 7, 17 have some of their contacting surfaces firmly retaining projecting particles of grit which have been engaged in the plastics material when the respective surface of the plastics material has been softened or melted. In order to further increase the steepness of the slopes, gritted geogrids 9, 19 are laid over the lining systems 2, 3 and secured in position.
摘要:
It is known to use small, light weight mesh pieces having high flexural recovery, to strengthen a matrix. Such mesh pieces are very difficult to handle and package. In order to provide a suitable packaging system, mesh pieces 11 are deposited across the width of a moving run of flexible wrapping material 13 and are deposited in longitudinally overlapping relationship along the length of the wrapping material, by feeding the mesh pieces 11 on a belt 10 which moves more quickly than the wrapping material 13; the mesh pieces 11 are ejected from the end of the belt 10 onto the wrapping material 13. The direction of movement of the wrapping material 13 is inclined downwards so that the trailing ends of the mesh pieces 11 contact the wrapping material 13 before the leading ends contact the preceding mesh piece 11. The wrapping material 13, with the mesh pieces 11 on it, is then rolled up under tension into a spiral bale so that the overlapping edges curl down and prevent the mesh pieces 11 slipping out.
摘要:
A laminate 3 is used which has on the bottom a geotextile fabric 2 with the mesh structure 4 on the top. The fabric 2 is adhered to the ground or road base 1 by spraying or spreading a bituminous liquid onto the ground and laying on the laminate and applying further adhesive to the top of the laminate 3; the asphalt 5 is then placed and rolled. The laminate 3 is formed of a square or rectangular mesh structure 4 which has oriented strands connected at junctions which are thicker than the strands and have low-orientated or unorientated nodules. On one side the surface of the nodules are melted and the fabric 2 is pressed into the nodules so that the plastics material of the nodules envelopes some of the fibres or filaments of the fabric 2 to form a mechanical bond. In this way, the oriented strands stand proud of the fabric 2, to enable the asphalt aggregate to penetrate into the meshes and interlock with the strands.
摘要:
In order to produce a non-cracky, integral, biaxially-oriented plastics material mesh structure 15 having a high strength/weight ratio, having high MD (machine direction) strength and substantially greater strength in the MD than in the TD (transverse direction), and having high creep resistance, a starting material 1 is provided having a rectangular grid of holes 8 and the starting material 1 is stretched in the MD to such an extent that the junctions are not significantly oriented, is stretched in the TD to such an extent that the junctions are not significantly oriented, and is finally stretched in the MD to such an extent that the junction centres thin down by at least 30% and there is significant narrowing down of the junction. The resultant MD stretch is substantially greater than the resultant TD stretch.
摘要:
In order to reduce the bulk, weight and cost of a vehicle spray inhibitor (4) while maintaining the performance or improving the performance, the inhibitor (4) has an inlet layer (6) formed of parallel, triangular-shaped inlet elements (8) with the apices of the triangles facing forwards. Behind the inlet layer (6), there is an energy absorbing layer (7) formed of bi-planar diamond mesh and a spacer layer (12). Each respective layer can be formed by the integral extrusion of plastics material mesh. The layers are attached to an impermeable backing such as a mud-flap (3).
摘要:
It is known to use small, light weight mesh pieces having high flexural recovery, to strengthen a matrix. Such mesh pieces are very difficult to handle and package. In order to provide a suitable packaging system, mesh pieces 11 are deposited across the width of a moving run of flexible wrapping material 13 and are deposited in longitudinally overlapping relationship along the length of the wrapping material, by feeding the mesh pieces 11 on a belt 10 which moves more quickly than the wrapping material 13; the mesh pieces 11 are ejected from the end of the belt 10 onto the wrapping material 13. The direction of movement of the wrapping material 13 is inclined downwards so that the trailing ends of the mesh pieces 11 contact the wrapping material 13 before the leading ends contact the preceding mesh piece 11. The wrapping material 13, with the mesh pieces 11 on it, is then rolled up under tension into a spiral bale so that the overlapping edges curl down and prevent the mesh pieces 11 slipping out.
摘要:
In order to make a high-profile structure, a planar, biaxially heat-shrinkable, plastics mesh layer (1) is fixed to a planar, relatively non-heat-shrinkable plastics mesh layer (2) at zones (3) which are spaced apart on a generally square grid, and the structure so formed is heated to cause the shrink layer (1) to shrink biaxially and thereby cause the non-shrink layer (2) to assume a cuspated configuration. This provides an inexpensive, dimensionally stable, regular high-profile, bulked structure. The structure can be shipped as a semi-finished product after fixing the layers together and before heating, thereby reducing bulk and hence shipping costs.