| 摘要 |
FIELD: textile, paper. ^ SUBSTANCE: method includes extrusion of a single polymer system from a melt of a crystallising amorphous polymer to produce multiple fibres. Conditions for polymer processing are developed, when the first polymer components is produced, being at least partially crystalline, and the second polymer component, being mainly amorphous, is made. Fibres are deposited onto a fitted surface in order to produce a web that contains partially both the crystalline first polymer component and the amorphous second polymer component. Fibres are glued to each other in order to produce a nonwoven cloth with glued fibres, in which the amorphous second polymer component is softened and melted, forming compounds with the first polymer component. The second polymer component is crystallised, as a result of which both specified polymer components in the produced nonwoven material are at least partially crystalline. At the same the treatment conditions are selected from a group that includes the following: a) fibres of the first polymer component are exposed to voltage that initiates crystallisation, and fibres of the second polymer component are exposed to voltage, which is not sufficient to initiate crystallisation, at the same time stages of the first and second polymer components exposure to voltage for initiation or non-initiation of crystallisation, include extrusion of fibres at differing stages of extrusion; b) fibres of the first polymer component are exposed to voltage, which initiates crystallisation, and fibres of the second polymer component are exposed to voltage, which is not sufficient to initiate crystallisation, at the same time stages of exposure at the first and second polymer components with voltage for initiation or non-initiation of crystallisation include provision of reduced characteristic viscosity of polymer in the polymer of the second polymer component relative to the characteristic viscosity of polymer of the first polymer component. This method produces a nonwoven material from fibres glued along area, containing matrix and binding fibres made from the single polymer system of semi-crystalline thermoplastic polymer melt. As a result, a strong adhesive nonwoven material is produced, in which matrix fibres have relatively high characteristic viscosity, and binding fibres have relatively low characteristic viscosity. At the same time fibres of nonwoven material have single peak of melting by data of differential scanning calorimetry DSC diagram. ^ EFFECT: reduced shrinkage of nonwoven material, reduced costs and increased efficiency of nonwoven material production process. ^ 38 cl, 16 dwg, 6 tbl, 8 ex |
