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A bicomponent fiber, the preparation process and the use thereof, and the fabrics comprising the same
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A bi-component fiber and fiber technology, applied in fabrics, fiber chemical characteristics, textiles, etc., can solve problems such as undisclosed use of crosslinking agents
Active Publication Date: 2015-07-22
BASF AG
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However, it does not disclose the use of crosslinking agents in the preparation of fibers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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[0043] In the preparation method of the fiber of the present invention, a crosslinking agent as defined below is added to either or both of the molten components i) and ii). When added, the amount of crosslinking agent added is about 0% to about 15% by weight, preferably 1% to 10% by weight, more preferably 2% to 8% by weight, based on the TPU used in polymer ii) %, based on the TPU used for polymer i), the amount of added crosslinking agent is about 5 wt% to about 25 wt%, preferably 8 wt% to 20 wt%, more preferably 10 wt% to 15 wt%.
[0044] The crosslinking agent used in the present invention is an NCO-terminated prepolymer having a functionality of 1.5 to 3, preferably 1.5 to 2.5, and more preferably 1.6 to 2.1. In one embodiment of the present invention, the crosslinking agent used is a prepolymer having an NCO content of 3% to 20% by weight, preferably 4% to 10% by weight, and more preferably 5% to 8% by weight.
[0045] The crosslinking agent can be prepared by the reaction ...
Embodiment 1
[0078] Two commercially available TPUs E1180A and E2280A (obtained from BASF, both have a Shore A hardness of 80A; their weight average molecular weights are 130,000 and 210,000, respectively) to prepare monocomponent fibers. A commercially available prepolymer PLP9302 (available from BASF, molecular weight about 2500) was used as a crosslinking agent (PLP9302 has a functionality of 2.0 and an NCO% of about 5.3).
[0079] Table 1 Properties of monocomponent fibers (30 denier)
[0080]
[0081]
[0082] E1180A, E2280A and PLP9302 were also used to prepare bicomponent fibers. Specifically, the fiber is prepared by the following steps:
[0083] (1) Melt E1180A and E2280A in different extruders at 200℃ and 210℃ respectively,
[0084] (2) Mix PLP9302 into molten E1180A and E2280A at 2% and 10% by weight based on TPU, respectively,
[0085] (3) Two kinds of melts are extruded from a spinning head with two concentrically arranged nozzles, and the melts are heated at 210°C to obtain a bicompo...
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Abstract
The present invention relates to a bicomponent fiber, comprising i) a first thermoplasticpolyurethane component;and ii) a second thermoplasticpolyurethane component, which may be the same as or different from component i), with at least one of components i) and ii) crosslinked by a crosslinker to form at least one polymer of polymer i) and polymer ii), of which polymer i) has a melting point of at least 10 C higher than that of polymer ii), and the fiber size being between 8 denier and 300 denier, more preferably between 10 denier and 100 denier. The bicomponent fibers of the present invention are superior in heat-bonding behavior and recovery, and may be dyeability and chemical-resistance.
Description
Technical field [0001] The invention relates to a bicomponent fiber, a preparation method and application thereof, and a fabric containing the bicomponent fiber. Background technique [0002] Multi-component fibers showing various characteristics have undergone a lot of development and have been widely used. Its important use lies in knitting or weaving fabrics. In contrast to nonwoven fabrics (nonwoven fabrics), knitted or woven fabrics have relatively high elasticity and recovery properties, making the final products durable and easy to conform to individuals who use or wear these products. [0003] Currently, multi-component or bi-component fibers are usually made by solution spinning. However, this method results in impurities such as solvents, monomers and oligomers in the final fiber, which have a negative impact on the mechanical properties or durability of the fiber or human health. For example, in the solution spinning method, DMF (dimethylformamide) is usually used as ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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