| 摘要 |
The core/shell fibre is made from plastics such as polypropylene, polyethylene or a mixture of said raw materials or other thermoplastic polymers. The fibre diameter is 0.15 to 2.0 mm and the core/shell fibre has a completely- or intermittently-structured surface, generated by embossing (5) which is carried out on a single side or multiple sides, the depth of which is at least 10 % of the average fibre diameter. The embossing (5) can be perpendicular or diagonal or in any form with relation to the fibre direction, but in any case is increased by a factor of 5 to 15 after drawing the fibre. The core/shell fibre is cut in sections of 10 to 80mm and collected in bundles of several thousand and wound in a water-soluble plastic film. Said fibres are used to increase the tensile strength, to improve the crush resistance or generally for mechanical reinforcement of cement-bonded building materials, in particular in concrete. The bundles can be incorporated together with the plastic film in the building material with no disadvantages. |
