ELASTIC NON-WOVEN FABRIC WITH BICOMPONENT ELASTIC COMPOSITE FIBERS

Abstract

An elastic non-woven fabric with bicomponent elastic composite fibers, manufactured by randomly paving bicomponent elastic composite fibers as a layer and hot-rolling. The bicomponent elastic composite fiber includes an inner core fiber of SBS, SEBS, TPO or TPS and a sheath outer layer of PP or PE covering on an outer surface of the inner core fiber. A ratio of a thickness of the sheath outer layer to a radius of the inner core fiber is 1:9 to 9:1. The bicomponent elastic composite fiber has a linear density of 0.5-5 deniers, a stretchability of 300-600%, and a deformation rate of 0-25% after being stretched to 400%. The present invention has the advantages of good elasticity, good stretchability, good dyeability, acid and alkali resistance, quick-drying and non-absorbency, antibacterial and deodorizing, and light and soft texture properties, thereby can avoid cold and sticky feel and will not cause reflection.

Claims

1. An elastic non-woven fabric with bicomponent elastic composite fibers, manufactured by randomly paving a plurality of bicomponent elastic composite fibers as a layer and then fixing it by a plurality of hot-rolling points, wherein each of the bicomponent elastic composite fibers has a bicomponent fiber structure with a core sheath or a core spun and includes an inner core fiber and a sheath outer layer covering on an outer surface of the inner core fiber; wherein the inner core fiber includes a polystyrene copolymer material of a styrene-butadiene block copolymer, a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or includes a thermoplastic polystyrene elastomer (TPS); wherein the sheath outer layer includes polypropylene (PP) or polyethylene (PE); wherein a ratio of a thickness of the sheath outer layer to a radius of the inner core fiber is between 1:9 to 9:1; wherein each of the bicomponent elastic composite fibers has a linear density of 0.5-5 deniers and a stretchability of 300-600%; and wherein each of the bicomponent elastic composite fibers has a deformation rate of 0-25% after being stretched to 400%.

2. The elastic non-woven fabric according to claim 1, wherein the inner core fiber has a stretchability of 100-600%.

3. The elastic non-woven fabric according to claim 1, wherein the sheath outer layer has dyeability.

4. The elastic non-woven fabric according to claim 3, wherein the polypropylene has a graft-dyeing base for dyeing.

5. The elastic non-woven fabric according to claim 1, wherein the ratio of the thickness of the sheath outer layer to the radius of the inner core fiber is 9:1, the bicomponent elastic composite fiber has a linear density of 1-3 deniers and a stretchability of 500%, and the bicomponent elastic composite fiber has a deformation rate of 1% after stretching to 400%.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which:

[0036] FIG. 1 is a perspective view of the present invention; and

[0037] FIG. 2 is a schematic structural diagram of a bicomponent elastic composite fiber of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0038] Embodiments of the present invention will be described in more detail below with reference to the drawings and the reference numerals, such that those skilled in the art can implement it after studying this specification.

[0039] Referring to FIG. 1 and FIG. 2, wherein FIG. 1 is a perspective view of the present invention and FIG. 2 is a schematic structural diagram of a bicomponent elastic composite fiber 10 of the present invention. The present invention provides an elastic non-woven fabric 1 with bicomponent elastic composite fibers, which is manufactured by randomly paving a plurality of bicomponent elastic composite fibers 10 as a layer and then fixing it by a plurality of hot-rolling points 20.

[0040] The hot-rolling point technology is commonly known as spun-bonding technology, wherein the plurality of bicomponent elastic composite fibers 10 are firstly randomly paved as a layer on a conveyor belt (not shown); then, a heated roller (not shown) is used to roll at several places of the plurality of bicomponent elastic composite fibers 10, which are randomly paved as a layer, to form a plurality of hot-rolling points 20, thereby the plurality of bicomponent elastic composite fibers 10 are fixed by heat fusion.

[0041] Each of the bicomponent elastic composite fibers 10 includes an inner core fiber 11 and a sheath outer layer 12. The sheath outer layer 12 covers on an outer surface of the inner core fiber 11. The inner core fiber 11 is constituted of a thermoplastic elastic material and the sheath outer layer 12 is constituted of a thermoplastic material, such that each of the bicomponent elastic composite fibers 10 has excellent elasticity. Preferably, the sheath outer layer 12 is constituted of a dyeable thermoplastic material, such that each of the bicomponent elastic composite fibers 10 may also have dyeability.

[0042] In particular, each of the bicomponent elastic composite fibers 10 essentially has a bicomponent fiber structure with a core sheath or a core spun. Each of the bicomponent elastic composite fibers 10 has a linear density of 0.5-5 deniers and a stretchability of 300-600%. Each of the bicomponent elastic composite fibers 10 has a deformation rate of 0-25% after being stretched to 400%.

[0043] Further, the inner core fiber 11 includes a polystyrene copolymer material such as a styrene-butadiene block copolymer, a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or includes a thermoplastic polystyrene elastomer (TPS). Furthermore, the inner core fiber 11 has a stretchability of 100-600%.

[0044] It is well known that the above-mentioned thermoplastic polystyrene elastomers (TPS), which are also referred to as styreneic block copolymers (SBCs), are a type of thermoplastic elastomer with the largest production currently in the world and having the properties most similar to that of rubber. Currently, there are mainly four types in the species of the thermoplastic polystyrene elastomer series, that is: styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS) and styrene-ethylene-propylene-styrene block copolymer (SEPS), wherein SEBS and SEPS are hydrogenated copolymers of SBS and SIS, respectively.

[0045] Further, the hard segment of the thermoplastic polyolefin elastomer (TPO) is a polyolefin material such as polypropylene (PP) or polyethylene (PE) or the like, and the soft segment thereof is a rubber such as ethylene propylene diene monomer (EPDM) and the like. Generally, TPO is formed by polymerization using metallocene as a catalyst, wherein the hard segment and the soft segment are directly combined by a covalent bond, and thus TPO is also referred to as M-POE.

[0046] In addition, the sheath outer layer 12 may include hard material such as polypropylene (PP) or polyethylene (PE) and has dyeability, and the ratio of a thickness of the sheath outer layer 12 to the radius of the inner core fiber 11 may be between 1:9 to 9:1, in order to adjust the optimal properties of softness, stretchability, restoring rate, tensile strength and the like according to practical needs. Preferably, the above-mentioned polypropylene may have graft-dyeing bases for enhancing dyeability.

[0047] In a preferred embodiment, the ratio of the thickness of the sheath outer layer 12 to the radius of the inner core fiber 11 is 1:9; the bicomponent elastic composite fiber 10 has a linear density of 1-3 deniers and a stretchability of 500%; and the bicomponent elastic composite fiber 10 has a deformation rate of 1% after being stretched to 400%.

[0048] Since the polypropylene (PP) constituting the sheath outer layer 12 has a characteristic of low dyeing temperature (lower than 160 C., about 70-110 C.), which is far lower the dyeing temperature of polyurethane (Spandex, OP, Elastane), polyester (PET), nylon (Nylon 66) and OP elastic yarn (180 C., 130-135 C., 110 C. and 125 C., respectively), the dyeing energy and the dyeing time can be reduced, thereby achieving energy-saving effect.

[0049] Furthermore, the sheath outer layer 12 and the inner core fiber 11 can be used for one-time fiber drawing production of the bicomponent elastic composite fiber 10. Therefore, it allows not only a simpler production process but also a raw material cost lower than that of the commercially available elastic yarn (Spandex). In addition, there is almost no pollutant generated during the production process. Moreover, it is very easy to be recycled and reused, thereby achieving the circular economy of recycling and reuse.

[0050] In summary, the present invention has excellent properties of elasticity and stretchability by using a thermoplastic elastic material as the inner core fiber 11 of each of the bicomponent elastic composite fibers 10. In addition, the present invention can avoid cold and sticky feel and will not cause reflection phenomenon by using a hard thermoplastic material as the sheath outer layer 12 of each of the bicomponent elastic composite fibers 10.

[0051] Further, by using polypropylene with graft-dyeing bases as the sheath outer layer 12, the present invention can have a better dyeability (SDY 110 C. dyeing) than the general polypropylene fiber, and have the same grade of washing fastness (SDY 110 C. dyeing) as polyester (PET). In particular, the practical needs of optimum properties of softness, stretchability, restoring rate, tensile strength and the like can be satisfied by adjusting the ratio of the thickness of the sheath outer layer 12 to the radius of the inner core fiber 11.

[0052] The mentioned above are only preferred embodiments for explaining the present invention but intend to limit the present invention in any forms, so that any modifications or verification relating to the present invention made in the same spirit of the invention should still be included in the scope of the invention as intended to be claimed.