Superfine elastic non-woven fabric and preparation method thereof

Abstract

The invention provides superfine elastic non-woven fabric prepared based on a plane-receiving centrifugal spinning device and a preparation method thereof.The preparation method is characterized in that polyurethane particles are dissolved in N,N-dimethylformamide to prepare a spinning solution, and then the spinning solution is injected into the plane-receiving centrifugal spinning device to perform centrifugal spinning.By reasonably setting the spinning parameters of centrifugal spinning, the spinning process is guaranteed to be smoothly carried out; the fiber diameter of the prepared superfine elastic non-woven fabric can reach 2.1+ / -1.1 mum; the arrangement is dense; the tensile strength can reach 18.59+ / -5.59 MPa; the elongation at break can reach 450+ / -20%; the method provided by theinvention is simple in operation process, suitable for large-scale mass production, and high in production efficiency.

Description

technical field [0001] The invention relates to the field of non-woven fabrics, in particular to an ultrafine elastic non-woven fabric prepared based on a plane-receiving centrifugal spinning device and a preparation method thereof. Background technique [0002] The full name of polyurethane is polyurethane. It is a high molecular polymer containing more carbamate groups or urea groups in the main chain. It is formed by the addition polymerization of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy. Polyurethane is a polymer material composed of hard segment phase and soft segment phase, and its performance mainly depends on the phase structure and microphase separation degree of soft and hard segments. Due to its large cohesive energy, the hydrogen bonds formed between molecules make it gather together to form a hard segment; while the less polar polyether segment or polyester segment gather together to form a soft segment. Section area; because polyuret...

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Problems solved by technology

Traditional centrifugal spinning equipment usually uses ring collecting rods to collect fibers. The fibers obtained by this collection method are discontinuous short fibers, and the production efficiency is low, which limits the application of centrifugal spinning in large-scale production, and the prepared fibers have poor properties. good

[0004] The patent application with the application number CN201210448865.5 discloses a method for preparing polyurethane elastic fiber with low temperature setting. The method uses polyether diol PTMG, polyester diol PE, diphenylmethane diisocyanate MDI, tetramethyl Xylylene diisocyanate m-TMXDI carries out polycondensation reaction, obtains urethane prepolymer; And with DMAC or DMF as solvent, prepolymer is fully dissolved; Then, use chain extender, chain terminator solution to The prepolymer undergoes chain extension and chain termination reactions to obtain a polyurethane urea solution; finally, various functional additives are added to the polyurethane urea solution, and a polyurethane elastic fiber with low-temperature setting performance is prepared by means of a dry spinning system. The polyurethane elastic fiber prepared by the method has good setting performance, but it has the following disadvantages: the operation process is complicated, the output of the dry spinning system used is low, and it is not suitable for mass production

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