TWI683932B - Double combined elastic fiber and elastic multifilament fiber containing the double combined elastic fiber and preparation method - Google Patents

Abstract

A double-combined elastic fiber with a linear density of 20-50 deniers and an elongation of 300-600%. After stretching to 400%, the deformation rate is 0-25%. The dual-combination elastic fiber includes an inner core fiber and a sheath outer layer, and the inner core fiber includes a polystyrene series of a styrene-butadiene block copolymer, a hydrogenated styrene-butadiene block copolymer, or a polyene elastomer Copolymer material, or contain polystyrene elastomer. The outer layer of the sheath contains polypropylene or polyethylene. In this way, the invention has zero pollution when it is recycled. In addition, the invention has excellent elasticity, dyeability, acid and alkali resistance, quick-drying, non-absorbent, antibacterial and deodorant, and soft texture. In addition, the elastic multifilament fiber including the dual-combination elastic fiber has all the functions of the dual-combination elastic fiber.

Description

Double combined elastic fiber and elastic multifilament fiber containing the double combined elastic fiber Peacekeeping

The invention relates to a fiber, in particular, a thermoplastic elastic material is used to constitute the inner core fiber, and a thermoplastic material is used to constitute the outer sheath layer, and the outer sheath layer is coated on the surface of the inner core fiber to form an elastic double combined elastic fiber and An elastic multifilament fiber containing the double-combined elastic fiber and its preparation method.

In recent years, with the prevalence of leisure sports, the sales of functional sports fabrics have also increased, and at the same time, the general consumer users have gradually increased the requirements for fabric performance. For example, in addition to being lighter, moisture wicking, antibacterial and deodorant, it is further hoped that the elastic fiber fabric with close-fitting comfort can reduce the feeling of restraint. Therefore, in terms of material technology, there is a need for more possibilities of movement between extension and response force, and an optimal balance between functionality and comfort can be achieved.

Since the elastic spinning technology has improved the process steps year by year, it has the advantages of easier manufacturing, processing, durability, fast production efficiency and low cost, and is widely used in many functional sports fabrics.

However, in the conventional technology, the general elastic fiber fabric has the following shortcomings to be overcome.

First of all, the elastic fiber fabric made of diene elastic fiber (elastic yarn) is not suitable for users who have severe allergic symptoms to latex. Usually synthetic rubber such as neoprene, butyl rubber, etc. Replace it with glue to avoid allergic reactions. However, the cost of synthetic rubber is usually relatively high, so the competitiveness of the elastic fiber fabric is relatively weak.

In addition, the materials that are more widely used to make elastic fiber fabrics also include polyurethane fibers (Spandex, OP, spandex, elastic yarn). However, there are several problems with polyurethane fibers: first, there is the problem of difficult recycling; second, dioxin will be generated during combustion, which seriously pollutes the environment; third, poor weather resistance and light resistance affect the service life limit.

Furthermore, polyetherester elastic fiber (TPEE) is also a common elastic fiber fabric material. However, the hardness of the polyetherester elastic fiber is relatively hard, which affects the softness of the elastic fiber fabric. At the same time, the processing conditions are also relatively narrow. It is necessary to use more precise processing machinery, which results in a relatively expensive price.

In addition, each elastic fiber is directly drawn with a single-component elastomer, which leads to the problem of sticking between multiple elastic fibers of the elastic fiber fabric.

In particular, the temperature requirements of fabrics during dyeing and shaping (heat dimensional stability, wrinkle removal) are very high. As a further example, polyurethane fibers (Spandex, OP, spandex), polyester (Polyester), and polyamide (Nylon) elastic fibers must withstand high temperatures of 180 to 240°C when paired with heat setting. Moreover, the heat setting temperature of this type of polyurethane elastic fiber is above 180 ℃, which is higher than the melting point of polypropylene (PP) fiber of 160 ℃, resulting in polypropylene fiber coating this type of polyurethane elastic fiber to form a yarn Because of different glass transition points (Tg) between different materials, the effect of heat setting is affected. It is well known that when the temperature is too low, the elastic fiber fabric cannot remove the wrinkles and stabilize the size; however, when the temperature is too high, the polypropylene fiber will become fluid and lose its fiber shape so that it cannot be used.

Existing polypropylene fibers are colored fibers by adding colored masterbatch when manufacturing fibers. But in this way, the color diversity will be worse than the traditional dyeing and finishing method.

For example, the dyeing temperature of polyester fiber is about 130~135℃, the dyeing temperature of nylon fiber (Nylon66) is about 110℃, and the dyeing temperature of OP elastic yarn is about 125℃, which is quite high. In particular, although OP elastic yarns (polymer yarns) are dyeable, they are not colored, that is, the dye is only attached to the surface, so the overall dyeing reliability is extremely poor.

The main purpose of the present invention is to provide a double-combination elastic fiber, the inner core fiber is composed of a thermoplastic elastic material, and the outer sheath layer is composed of a thermoplastic material, so the present invention has excellent elasticity.

Another object of the present invention is to provide a dual-combination elastic fiber with excellent dyeability.

Another object of the present invention is to provide a double-combination elastic fiber, which has the advantages of acid and alkali resistance, quick-drying, non-absorbent, antibacterial and deodorant, recyclable, and reuse, and has a soft texture, which is suitable for application in thin coats, tight-fitting clothes, or diapers. Make wearing more comfortable.

Still another object of the present invention is to provide an elastic multifilament fiber including the double-combined elastic fiber and a manufacturing method, and the prepared elastic multifilament fiber has all the functions of the double-combined elastic fiber.

In order to achieve the foregoing objective, the present invention will provide a dual-combination elastic fiber, which is a dual-combination fiber structure with a core sheath or a core, including: an inner core fiber and an outer sheath layer. The core fiber is composed of styrene-butadiene block copolymer (SBS), hydrogenated styrene-butadiene block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS) or Polystyrene copolymer material of Thermoplastic polyolefin elastomer (TPO), or containing polystyrene elastomer (Thermoplastic polyolefin elastomer) elastomer, TPS). The outer layer of the sheath is coated on the surface of the core fiber, and contains polypropylene (Polypropylene, PP) or polyethylene (Polyethylene, PE), and the ratio of the thickness of the outer layer of the sheath to the radius of the core fiber is 1: Between 9 and 9:1.

Among them, the double-combination elastic fiber has a linear density of 20-150 Danny and an extensibility of 300-600%.

Among them, the deformation rate of the double-combined elastic fiber after stretching to 400% is 0~25%.

Preferably, the core fiber has an elongation of 100 to 600%.

Preferably, the outer layer of the sheath has dyeability.

Preferably, the polypropylene has a graft dyeing base for dyeing.

Preferably, the ratio of the thickness of the outer layer of the sheath to the radius of the inner core fiber is 9:1, the double combined elastic fiber has a linear density of 30 denier and 500% extensibility, and the double combined elastic fiber is stretched to 400% , The deformation rate is 1%.

In order to achieve the foregoing objective, the present invention will provide a method for manufacturing elastic multifilament fibers including double combined elastic fibers, which includes the following steps: a stretching step: stretching a double combined elastic fiber several times; a wrapping step: a plurality of peripheral edges The fibers surround the outer side of the double-combined elastic fiber together, and the elasticity of each peripheral fiber is lower than that of the double-combined elastic fiber; spraying step: forming a plurality of spraying nodes on the plurality of peripheral fibers and the double-combined elastic fiber, to An elastic multifilament fiber is formed, and these spray nodes divide the elastic multifilament fiber into multiple sections; and the loosening step: loosen the double combined elastic fiber, so that the elastic multifilament fiber shrinks by the deformation rate of the double combined elastic fiber Return to the natural state, so that in each section of the elastic multifilament fiber, the double group The length of the combined elastic fiber is equal to the distance between adjacent two-spray nodes, and the length of each peripheral fiber is greater than the distance between adjacent two-spray nodes.

Preferably, the double combination elastic fiber is stretched three times.

Preferably, the material of each peripheral fiber is polyester.

In order to achieve the foregoing objective, the present invention will provide an elastic multifilament fiber including double-combined elastic fibers, including a double-combined elastic fiber and a plurality of peripheral fibers, the plurality of peripheral fibers surrounding the double-combined elastic fibers together and by the plural Each spray node contacts the double combined elastic fiber, and the elasticity of each peripheral fiber is lower than that of the double combined elastic fiber.

Among them, the spray node divides the elastic multifilament fiber into multiple sections. In each section of the elastic multifilament fiber, the length of the double combined elastic fiber is equal to the distance between the adjacent two spray nodes, and each peripheral fiber The length of is greater than the distance between the adjacent two spray nodes.

Preferably, the material of each peripheral fiber is polyester.

The effect of the present invention is that the inner core fiber is composed of a thermoplastic elastic material, and the outer sheath layer is composed of a thermoplastic material, so that the double combined elastic fiber of the present invention and the elastic multifilament fiber containing the double combined elastic fiber have excellent elasticity.

Furthermore, the dual-combination elastic fiber of the present invention and the elastic multifilament fiber including the dual-combination elastic fiber can provide excellent dyeability through a dyeable outer sheath layer.

In addition, the dual-combination elastic fiber of the present invention and the elastic multifilament fiber containing the dual-combination elastic fiber can provide the advantages of acid and alkali resistance, quick-drying, non-absorbent, antibacterial and deodorizing, recyclable, and reuse, and the texture is soft and suitable for application Lightweight jackets, tight clothing or diapers can make wearing more comfortable.

In addition, the polypropylene (PP) constituting the outer layer of the sheath has the characteristics of low-temperature dyeing (melting point lower than 160℃, about 70~110℃), which is much lower than the polyester (PET) 130-135℃, nylon ( Nylon66) 110℃, 125℃ of OP elastic yarn, so it can reduce heat energy, shorten dyeing time, and save energy.

Further, the dual-combination elastic fiber of the present invention can use the outer layer of the sheath and the inner core fiber for one-time fiber drawing production. Not only is the production process simpler, but the raw material price is also lower than that of the commercially available elastic yarn (Spandex). In the production process, almost no pollutants are generated and it is very easy to recycle and reuse, to achieve a recycling and recycling economy.

1‧‧‧Double combined elastic fiber

10‧‧‧core fiber

20‧‧‧Outer sheath

2‧‧‧Peripheral fiber

3‧‧‧Elastic multifilament fiber

31‧‧‧Section

100‧‧‧Elastic fiber fabric

P‧‧‧Spray node

S10‧‧‧Stretching steps

S20‧‧‧Surrounding steps

S30‧‧‧Spraying step

S40‧‧‧Release procedure

FIG. 1 is a schematic view of the structure of the dual combined elastic fiber of the present invention.

2 is a cross-sectional view of an elastic fiber fabric made by feeding a plurality of double-combined elastic fibers of the present invention into a loom in a multifilament manner.

Fig. 3 is a flowchart of the method for producing the elastic multifilament fiber of the present invention.

Fig. 4 is a schematic diagram of the steps of drawing, wrapping and spraying of the method for producing elastic multifilament fibers of the present invention.

Fig. 5 is a schematic diagram of the loosening step of the method for manufacturing the elastic multifilament fiber of the present invention.

The embodiments of the present invention will be described in more detail below with reference to drawings and component symbols, so that those skilled in the art can implement them after studying this specification.

Please refer to FIG. 1, which is a schematic structural view of a dual-combination elastic fiber 1 of the present invention. The present invention provides a dual-combination elastic fiber 1, which includes an inner core fiber 10 and an outer sheath 20. The outer sheath layer 20 covers the surface of the inner core fiber 10, and the inner core fiber 10 is composed of a thermoplastic elastic material, while the outer sheath The layer 20 is composed of a thermoplastic material, and thus the dual-combination elastic fiber 1 of the present invention has excellent elasticity. Preferably, the outer sheath layer 20 is composed of a dyeable thermoplastic material, so the dual-combination elastic fiber 1 of the present invention can also have dyeability.

Specifically, the dual-combination elastic fiber 1 of the present invention is essentially a dual-combination fiber structure having a core sheath or a core. In particular, the dual-combination elastic fiber 1 of the present invention has a linear density of 20 to 150 denier and an extensibility of 300 to 600%. After being stretched to 400%, the dual-combination elastic fiber 1 of the present invention has a deformation rate of 0 to 25%.

Further, the inner core fiber 10 contains styrene-butadiene block copolymer (SBS), hydrogenated styrene-butadiene block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS) ) Or a polystyrene-based copolymer material of Thermoplastic polyolefin elastomer (TPO), or a polystyrene-based elastomer (Thermoplastic polyolefin elastomer, TPS). Furthermore, the core fiber 10 has an extensibility of 100 to 600%.

It is well known that the above-mentioned thermoplastic polystyrene elastomer (TPS), also known as Styreneic Block Copolymers, or SBCs for short, is currently the world's largest producer and has the most similar properties to rubber A thermoplastic elastomer. At present, there are four main types of SBCs, namely: styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), Styrene-ethylene-butene-styrene block copolymer (SEBS) and styrene-ethylene-propylene-styrene block copolymer (SEPS), and SEBS and SEPS are hydrogenated copolymers of SBS and SIS, respectively .

Further, the hard segment of the polyolefin elastomer (TPO) is a polyene material such as polypropylene (PP) or polyethylene (PE), and the soft one is rubber such as EPDM, generally Use Maojin Genus (metallocene) is formed as a catalyst by polymerization, in which the hard segment and the soft segment are directly combined by a covalent chain, and are also called M-POE.

In addition, the outer sheath layer 20 may include polypropylene (PP) or polyethylene (PE) and has dyeability, and the ratio of a thickness of the outer sheath layer 20 to a radius of the inner core fiber 10 may be 1:9 to Between 9:1, it is used to adjust the best softness, elongation, response rate, tensile strength and other characteristics according to actual needs. The polypropylene described above may preferably have a graft dyeing base for enhancing dyeability.

In a preferred embodiment, the ratio of the thickness of the outer layer 20 of the sheath to the radius of the inner core fiber 10 is 9:1. The double-combined elastic fiber 1 has a linear density of 30 denier and 500% extensibility. The double-combined elastic fiber 1 After stretching to 400%, the deformation rate is 1%.

Since the polypropylene (PP) constituting the outer layer 20 of the sheath itself has low-temperature dyeing characteristics (below 160°C, approximately 70-110°C), it is much lower than 180°C for polyurethane fibers (Spandex, OP, spandex). Ester (PET) 130 ~ 135 ℃, Nylon 66 (110 ℃), OP elastic yarn 125 ℃, so reduce thermal energy, and can shorten the dyeing time, to achieve energy-saving effects.

Furthermore, the present invention can use the sheath outer layer 20 and the inner core fiber 10 for one-time fiber drawing production. Not only is the production process simpler, but the raw material price is also lower than the commercially available elastic yarn (Spandex), and can be produced in In the process, almost no pollutants are generated and it is very easy to recycle and reuse, to achieve a recycling and recycling economy.

In summary, the dual-combination elastic fiber 1 of the present invention is characterized by having the advantages of acid and alkali resistance, quick-drying, non-absorbent, antibacterial, deodorant, recyclable, and reuse, and has a soft texture, which is suitable for application in thin coats, personal clothing or Diapers can make wearing more comfortable, especially with high elasticity and easy to dye, and the dyeing reliability is better, and can be mixed with other fibers to weave into functional fabrics with different high functionality, such as sports clothes or personal clothes .

In addition, the dual-combination elastic fiber 1 of the present invention has the characteristics of a lower glass transition point, which can meet the dyeing and setting conditions of polypropylene fibers, and at the same time improve the problems of fabric ironing (such as thermal dimensional stability) and further improve When interweaving with polyester and other fibers, the fiber cannot be colored and the elastic fiber is easily exposed or the color fastness is deteriorated.

In addition, the use of polypropylene with grafted dye base as the outer sheath 20 can have a deeper dyeability than ordinary polypropylene fibers (SDY 110°C dyeing), and it has the same grade as polyester (PET) Washing fastness (SDY 110°C dyeing). In particular, the ratio of the thickness of the outer layer 20 of the sheath to the radius of the inner core fiber 10 can be adjusted to meet the actual needs of the best characteristics of softness, elongation, coverage, tensile strength and the like.

The following is a description of further manufacturing two kinds of elastic fiber fabrics using the dual-combination elastic fiber 1 of the present invention.

First, please refer to FIG. 2, which is a cross-sectional view of a plurality of elastic fiber fabrics 100 produced by feeding a plurality of double-combined elastic fibers 1 of the present invention into a loom in a multifilament manner. The double combined elastic fiber 1 of the preferred embodiment of the present invention is directly fed into a loom (not shown) in a multifilament manner, thereby weaving into an elastic fiber fabric 100. Therefore, the manufactured elastic fiber fabric 100 also has all the functions of the double combined elastic fiber 1 described above.

Next, please refer to FIG. 3 to FIG. 5, FIG. 3 is a flow chart of the method for manufacturing the elastic multifilament fiber 3 of the present invention, and FIG. 4 is a drawing, wrapping and spraying steps of the method for manufacturing the elastic multifilament fiber 3 of the present invention. 5 is a schematic diagram of the loosening step S40 of the method for manufacturing the elastic multifilament fiber 3 of the present invention. The invention provides a method for manufacturing elastic multifilament fiber 3, which includes a drawing step S10, a wrapping step S20, a spraying step S30, and a loosening step S40.

Stretching step S10: stretch a pair of combined elastic fibers 1 several times. Among them, it is preferable to stretch three times.

Surrounding step S20: a plurality of peripheral fibers 2 are collectively wrapped around the outer side of the double-combined elastic fiber 1, and the elasticity of each peripheral fiber 2 is lower than that of the double-combined elastic fiber 1. Preferably, the material of each peripheral fiber 2 is polyester, which is almost inelastic.

Spraying step S30: a plurality of spraying nodes P are formed on the plurality of peripheral fibers 2 and the double-combined elastic fiber 1 to form an elastic multifilament fiber 3. These spray nodes P divide the elastic multifilament fiber 3 into a plurality of sections 31.

Loosen step S40: Loosen the double combined elastic fiber 1, so that the elastic multifilament fiber 3 shrinks back to its natural state by the deformation rate of the double combined elastic fiber 1. Therefore, in each section 31 of the elastic multifilament fiber 3, the length of the double combined elastic fiber 1 is equal to the distance of the adjacent two-spray node P, and the length of each peripheral fiber 2 is greater than the adjacent two-spray node P distance. The prepared elastic multifilament fiber 3 has all the functions of the double combined elastic fiber 1.

A plurality of elastic multifilament fibers 3 of the present invention can be further fed into a loom (not shown), thereby weaving into an elastic fiber fabric (not shown). Therefore, the manufactured elastic fiber fabric also has all the functions of the double combined elastic fiber 1 described above.

The above are only the preferred embodiments for explaining the present invention, and are not intended to restrict the present invention in any form, so that any modification or change made to the present invention under the same spirit of the invention , Should still be included in the scope of protection of the present invention.

1‧‧‧Double combined elastic fiber

10‧‧‧core fiber

20‧‧‧Outer sheath

Claims (10)

A double-combined elastic fiber, which is a double-combined fiber structure with a core sheath or core, including: an inner core fiber, which is composed of styrene-butadiene block copolymer (SBS), Hydrogenated styrene-butadiene block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS) or polystyrene copolymer (Thermoplastic polyolefin elastomer, TPO) polystyrene copolymer material, or contains poly Styrene-based elastomer (Thermoplastic polyolefin elastomer, TPS); and a sheath outer layer, which is coated on the surface of the core fiber, and contains polypropylene (Polypropylene, PP) or polyethylene (Polyethylene, PE), and the The ratio of the thickness of the outer layer of the sheath to the radius of the inner core fiber is between 1:9 and 9:1; wherein, the double-composite elastic fiber has a linear density of 20 to 150 denier and an extension of 300 to 600% In which, after the double combined elastic fiber is stretched to 400%, the deformation rate is 0~25%. The dual-combination elastic fiber as described in item 1 of the patent application range, wherein the inner core fiber has an elongation of 100 to 600%. The dual-combination elastic fiber as described in item 1 of the patent application, wherein the outer layer of the sheath has dyeability. The dual-combination elastic fiber as described in item 3 of the patent application scope, wherein the polypropylene has a graft dyeing base for dyeing. The dual combined elastic fiber as described in item 1 of the patent application range, wherein the ratio of the thickness of the outer layer of the sheath to the radius of the inner core fiber is 9:1, the dual combined elastic fiber has a linear density of 30 denier and 500% extensibility. After the double combined elastic fiber is stretched to 400%, the deformation rate is 1%. A method for manufacturing elastic multifilament fibers, including the following steps: drawing step: stretching a double-combined elastic fiber as described in any of items 1 to 5 of the patent application range; surrounding step: drawing a plurality of peripheral edges The fibers surround the outer side of the double combined elastic fiber together, and the elasticity of each peripheral fiber is lower than that of the double combined elastic fiber; spraying step: forming a plurality of sprays on the plurality of peripheral fibers and the double combined elastic fiber together Nodes to form an elastic multifilament fiber, the spray nodes divide the elastic multifilament fiber into multiple sections; and the loosening step: loosen the double combined elastic fiber so that the elastic multifilament fiber passes through the The deformation rate of the double-combined elastic fiber shrinks back to its natural state, so that in each section of the elastic multi-filament fiber, the length of the double-combined elastic fiber is equal to the distance between the adjacent two-spray nodes, and the length of each peripheral fiber It is greater than the distance between the adjacent two spraying nodes. The method for producing an elastic multifilament fiber as described in item 6 of the patent application range, wherein in the drawing step, the double combined elastic fiber is drawn three times. The method for producing elastic multifilament fibers as described in item 6 of the patent application scope, wherein the material of each peripheral fiber is polyester. An elastic multifilament fiber, comprising a double combined elastic fiber as described in any one of claims 1 to 5 and a plurality of peripheral fibers, the plurality of peripheral fibers Surrounding the double-combined elastic fiber together and contacting the double-combined elastic fiber together through a plurality of spray nodes, the elasticity of each peripheral fiber is lower than the elasticity of the double-combined elastic fiber; The silk fiber is divided into multiple sections, and in each section of the elastic multifilament fiber, the length of the double combined elastic fiber is equal to the distance between the adjacent two-spray nodes, and the length of each peripheral fiber is greater than that of the adjacent The distance of the second spray node. The elastic multifilament fiber as described in item 9 of the patent application scope, wherein the material of each peripheral fiber is polyester.

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