TW201600671A - Spunbond non-woven fabric - Google Patents

Abstract

A spunbond non-woven fabric includes a non-woven mono-filament fiber having Y-type-cross-section structure. The non-woven mono-filament fiber includes an inner composition, of which the melt point is higher than 220 DEG C and which includes polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or polytrimethylene terephthalate (PTT); and an outer composition, of which the melt point is lower than 220 DEG C and which includes the copolymer of polyethylene terephthalate (CoPET), polypropylene (PP) or polyamide (PA); wherein the weight ratio of the inner composition in non-woven fiber is higher than 50%, and the weight ratio of the outer composition in non-woven fiber is lower than 50%. The present invention spunbond non-woven fabric has the properties of high intensity, lightweight, flexible, and washable and be suitable for stitching, and is capable of manufacturing a shoe midsole with high quality.

Description

Spunbonded non-woven fabric 【0001】

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a spunbond nonwoven fabric, and more particularly to a spunbond nonwoven fabric spun from a plurality of nonwoven monofilament fibers having a two-component Y-profile structure.

【0002】

In the field of the textile industry, the non-woven industry is one of the few industries that are still developing rapidly in Taiwan. Non-woven fabric is a kind of fabric which is processed by high-pressure forming or bonding by needle-rolling machinery or carding machinery. It is an application of man-made fiber. Its process combines technologies and principles of plastics, chemicals, papermaking and textiles. The application of such rayon is called a non-woven fabric because it is not made by a conventional weaving method such as plain weaving or knitting. Non-woven fabrics are widely used because of their light weight, low thermal conductivity, good ventilation, moisture absorption, moisturizing, dustproof, fast production speed, low manufacturing cost and antistatic properties.

[0003]

However, the non-woven fabric is limited by the limitation of the production method, and the strength of the fabric is not originally high, and the direction of the fiber is basically arranged along the direction of processing into the web, resulting in a congenital defect in the production direction and the lateral strength drop. Therefore, in recent years, a method for producing a non-woven fabric by a spunbond process has been developed, in which a polymer polymer which has been melted has been extruded and drawn through a gas stream to form a continuous long fiber, and the long fiber is laid into a fiber. The net and the web are then subjected to self-adhesion, thermal bonding, chemical bonding or mechanical reinforcement to make the web into a non-woven fabric. Compared with the traditional non-woven fabric manufacturing method, the method has the advantages of high speed, large mass production capability, high automation degree and short process, and the spunbonded non-woven fabric produced has better mechanical strength. Therefore, spunbonded non-woven fabrics have been used in industries such as garment making and shoemaking, and are the trend of the textile industry in the future. In the spunbond technology, the two-component composite spunbond nonwoven fabric made of two different components has better properties. The two-component melt spinning technology is more complicated than the single component technology, and the cost is also high, and the product is applied for special purposes. market.

[0004]

In the process of shoes, the midsole plays a pivotal role, which is to carry the weight of a person's whole body, and even under the pressure of about 2 to 4 times the weight during running such as running. In terms of performance, it must be wear-resistant, shock-proof, dimensionally stable, non-slip, anti-twist, comfortable and breathable, light weight and flexural resistance, and the requirements are quite strict. In terms of process, it plays the role of combining the upper and the outsole. When engaging with the upper, it needs to withstand the piercing of the needle without fracturing, in order to maintain the accurate size of the seam of the upper, and it is more necessary to wear when the shoe is traveling. The strength exerted by the suture, while maintaining the integrity of the shoe shape, so the quality of the midsole of the shoe determines the quality and life of the whole pair of shoes. At present, the shoe midsole materials commonly used in the footwear industry include fiber plywood, staple fiber gluing non-woven fabrics or needle-stitch non-woven fabrics, each having its own shortcomings and limitations in use, as shown in Table 1, are not ideal.

Table 1

[0005]

In view of the above-mentioned demand for shoes, the industry has tried to apply the technology of two-component composite spunbonded nonwoven fabric to the midsole of the shoe. Although the obtained shoes have high strength and mechanical properties, the properties are superior in all aspects. The shoes made of the above materials, but their performance is still insufficient, so how to improve the physical properties and strength of the two-component spunbonded non-woven fabric, in order to develop high strength, lightweight, flexing, water-resistant, and suitable for stitching, pasting The high-performance spunbond non-woven midsole material of the process is a major issue in the industry today.

[0006]

In view of the above problems of the prior art, it is an object of the present invention to provide a spunbonded nonwoven fabric spun from a plurality of non-woven monofilament fibers having a two-component Y-section structure for use in making a midsole. The problem of the weight, strength, water wash resistance and flexibility of the material for making the midsole of the shoe in the prior art is solved.

【0007】

According to an object of the present invention, a spunbond nonwoven fabric comprising a non-woven monofilament fiber having a Y-shaped cross-section structure, the non-woven monofilament fiber comprising: an inner component, a melting point greater than 220 ° C, and comprising polyethylene terephthalate Polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or polytrimethylene terephthalate (PTT); and external component, melting point less than 220 °C, may include polyethylene terephthalate copolymer (CoPET), polypropylene (PP) or polyamide (PA); wherein the inner component accounts for more than the weight percentage of the non-woven monofilament fiber 50%, the outer component accounts for less than 50% by weight of the non-woven monofilament fiber.

[0008]

Preferably, the polyethylene terephthalate copolymer may be synthesized from isophthalic acid (IPA), adipic acid (AA) and butanediol, or may be isophthalic acid. Synthesis of formic acid, adipic acid and pentanediol.

【0009】

Preferably, the non-woven monofilament fibers may have a Y-shaped cross-sectional diameter of from about 5 μm to about 100 μm.

[0010]

Preferably, wherein the non-woven monofilament fibers have an anisotropy ratio of greater than about 0.8.

[0011]

Preferably, the non-woven monofilament fibers may be hollow.

[0012]

Preferably, the non-woven monofilament fibers can be made using a spinning device having a multi-layer plate runner distribution plate.

[0013]

Preferably, the non-woven monofilament fiber can be obtained by mixing the inner component and the outer component in a spinning device, and then cooling and drawing through a slit at a two-stage temperature and a two-stage pressure to obtain crystallization. Approximately 60% to about 90%, wherein: the two-stage temperature may be from about 35 ° C to about 45 ° C and from about 21 ° C to about 31 ° C, respectively; and the two-stage pressure may be from about 15 mbar to about 25 mbar and about 1.0, respectively. Bar to about 1.5 bar.

[0014]

Preferably, the spunbond nonwoven fabric can be obtained by collecting a plurality of non-woven monofilament fibers into a network and subjecting it to a hot air treatment at about 190 ° C to about 230 ° C and a pressure roller of from about 150 degrees to about 210 degrees.

[0015]

Preferably, the spunbond nonwoven fabric may have a thickness of from about 0.1 mm to about 3.0 mm.

[0016]

Preferably, the spunbond nonwoven fabric can be used to make a midsole.

[0017]

According to the present invention, a spunbond nonwoven fabric obtained by spunbonding a plurality of non-woven monofilament fibers having a two-component Y-shaped cross-section structure according to the present invention may have one or more of the following advantages:

[0018]

(1) The spunbonded nonwoven fabric can increase the tensile strength of the spunbonded nonwoven fabric by the mutual entanglement effect of a plurality of non-woven monofilament fibers having a Y-shaped cross-sectional structure, and can be applied to the production of the midsole of the shoe. Overcome the limitations of insufficient strength.

[0019]

(2) The spunbonded nonwoven fabric can accelerate the discharge of moisture in the shoe by the Y-shaped cross-section structure of the non-woven monofilament fiber and the hollow space formed by the hollow center, and at the same time, it is easy to achieve the purpose of weight reduction.

[0020]

(3) The spunbonded non-woven fabric can be recycled by using 100% of the raw material, and the material can be recycled and reused, thereby achieving the environmental protection purpose of resource recycling and reducing the production cost.

[0021]

(4) The spunbonded nonwoven fabric can be directly melted and spun from the ester pellet by the spunbonding process, without using an organic solvent, and is harmless to the employees and users of the shoe factory.

[0034]

1, 2‧‧‧ Non-woven monofilament fiber

10, 11 ‧ ‧ internal components

20, 21‧‧‧ external components

100‧‧‧heater

200‧‧‧Insulation

300‧‧‧Distribution board

400‧‧‧spinning plate

[0022]

Fig. 1 is a cross-sectional view showing a two-component Y-section structure of a non-woven monofilament fiber according to Example 1 of the present invention.

[0023]

Fig. 2 is a SEM sectional view showing the structure of the spunbonded nonwoven fabric obtained in Example 1 of the present invention.

[0024]

Figure 3 is a schematic illustration of a multi-layer plate runner distribution plate in a spinning apparatus.

[0025]

Fig. 4 is a cross-sectional view showing the two-component Y-section structure of the non-woven monofilament fiber of Example 2 of the present invention.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the embodiments of the spunbonded nonwoven fabric according to the present invention will be described with reference to the related drawings, and the same components in the following embodiments will be described with the same reference numerals.

[0027]

Referring to Fig. 1, there is shown a cross-sectional view of a two-component Y-section structure of a non-woven monofilament fiber according to Embodiment 1 of the present invention. The non-woven monofilament fiber 1 comprises an inner component 10 and an outer component 20, wherein the inner component 10 is hollow, has a melting point of more than 220 ° C, and comprises polyethylene terephthalate (PET) and polybutylene terephthalate. A glycol ester (PBT) or polytrimethylene terephthalate (PTT), preferably PET. The outer component 20 has a melting point of less than 220 ° C and comprises polyethylene terephthalate copolymer (CoPET), polypropylene (PP) or polyamine (PA), preferably CoPET. Among them, CoPET is isophthalic acid, adipic acid and butanediol, or a copolyester synthesized by copolymerization of isophthalic acid, adipic acid and pentanediol. The percentage of the inner component 10 to the non-woven monofilament fiber 1 is greater than 50%, and the outer component 20 is less than 50% of the non-woven monofilament fiber 1. Preferably, the inner component 10 and the outer component 20 are PET and CoPET, respectively, and the proportion of the non-woven monofilament fiber 1 is 85% and 15%, respectively.

[0028]

Please refer to Fig. 2, which is a SEM cross-sectional view showing the structure of the spunbonded nonwoven fabric obtained in Example 1 of the present invention. As shown in the figure, a plurality of non-woven monofilament fibers 1 are spun and bonded to form a spunbond nonwoven fabric of the present invention. The method of spunbonded non-woven fabric is as follows: firstly, the recycled PET bottle (including the edge material) is used as a raw material, and other required materials are added, and PET and CoPET are synthesized by a blending method and a copolymerization method respectively, and PET and CoPET are separately different. The hopper is extruded and transported to the spinning device. The PET as the inner component 10 and the CoPET as the outer component 20 are heated and melted in the spinning device to be respectively merged and flowed out by different yarn paths. Please refer to Fig. 3, which is a schematic view of a multi-layer plate runner distribution plate in a spinning device. When PET and CoPET are heated and melted by the heater 100 via the heat insulating layer 200 in the spinning device, since the melting point of PET is about 270 ° C, and the CoPET is about 150 ° C, the temperature difference is very large, and The closer the mutual distance is, the temperature variability will cause instability of the rheological properties. Therefore, the present invention utilizes a spinning device of a two-component melt distribution plate 300 having a thin multi-layer plate flow path, and a thin heat-resistant steel plate having a thickness of ≦0.5 mm. The melt flow path is cut by laser processing, and the distribution plate 300 with the least turbulence and high inclination is formed by lamination to reduce the interaction time of the two melt temperatures and reduce the impact on the rheological properties to achieve the two-component Spinning type stability, and the two-component melt flow index difference dMFI<200, section forming rate>70%, type variation <15%, conjugate ratio ≦50%, fiber fineness>9den, monofilament Fiber strength > 10 cN / den. The inner component 10 and the outer component 20 are combined and spun by the spinneret 400, and then passed through a slit at a temperature of about 35 ° C to about 45 ° C and a temperature of about 21 ° C to about 31 ° C, preferably 40 ° C. And 26 ° C; and a two-stage pressure of from about 15 mbar to about 25 mbar and from about 1.0 bar to about 1.5 bar, preferably 20 mbar and 1.3 bar, and a cooling draw to achieve a crystallinity of from about 60% to about 90%, The inner component 10 is PET and the outer component 20 is a non-woven monofilament fiber 1 having a Y-shaped cross-section of CoPET. The non-woven monofilament fiber 1 has a diameter of about 5 μm to about 100 μm, as shown in FIG. 2 . It is preferably 50 μm and its anisotropy ratio is greater than 0.8. The metaphysical property ratio refers to the ratio of the strength of the non-woven fabric in the straight direction and the transverse direction (90 degrees perpendicular), and the closer to 1 indicates that the structure of the non-woven fabric is equal. Then, a plurality of non-woven monofilament fibers 1 are further assembled into a network non-woven fabric, subjected to hot air treatment at about 190 ° C to about 230 ° C, and subjected to a pressure roller of about 150 degrees to about 210 degrees to obtain the spunbonded nonwoven fabric of the present invention. The thickness is from about 0.1 mm to about 3.0 mm.

[0029]

A spunbonded nonwoven fabric having a Y-type two-component non-woven monofilament fiber of Example 1 of the present invention is used for making a midsole of a shoe, and a comparative example of making a midsole using a staple fiber plywood, a fiber-dense board, and a needle-stitched nonwoven fabric, respectively. 1, 2 and 3 were compared, and the results are shown in Table 2.

Table 2

[0030]

Referring to Table 2, it can be seen that the first embodiment of the present invention has a Y-shaped cross section of a plurality of non-woven monofilament fibers 1, and the number of fusion points between the non-woven monofilament fibers 1 is large, and mutual entanglement effects are not required. By sizing, the strength of the obtained spunbonded nonwoven fabric can be greatly improved by the mutual fusion of the fibers, and the obtained midsole is superior to the flexural resistance of Comparative Examples 1, 2 and 3, and the number of times can be excellent. More than 150,000 times, that is, its strength has been greatly improved. At the same time, because the space formed between the non-woven monofilament fibers and the center of the non-woven monofilament fibers are hollow, the obtained midsole of the shoe is light in weight and achieves the goal of weight reduction.

[0031]

Please refer to Fig. 4, which is a cross-sectional view showing the two-component Y-section structure of the nonwoven monofilament fiber of Example 2 of the present invention. As shown, Example 2 is similar to Example 1, with the greatest difference being that the inner component 11 of Example 2 is solid rather than hollow. The inner component 10 of the foregoing embodiment 1 exhibits a hollow type because the melting point of PET as the inner component 10 is larger, and the melting point of CoPET as the outer component 20 is smaller. In the production process, the fluid has a melting point smaller than the melting point. The tendency of the person to drive is such that the nonwoven fabric monofilament fibers 1 obtained by the inner component 10 and the outer component 20 combined and spun from the spinneret are easily expanded to make the inner component 10 hollow. However, the non-woven monofilament fiber 2 of the second embodiment is controlled not to be hollow by the process conditions, but the inner component 11 material PET and the outer component 21 material CoPET plus the Y-type structure are combined, and the strength of the non-woven monofilament fiber 2 is still Very good, the midsole made has a very good performance in all kinds of performance.

[0032]

In summary, the spunbonded nonwoven fabric of the present invention has a plurality of non-woven monofilament fibers having a two-component Y-shaped cross-section structure, and the inner component PET and the special outer component CoPET form a Y-shaped cross-cut. The surface structure is therefore high in strength, light weight, flexural resistance, washable, and suitable for the characteristics of seaming and pasting processes, and can be applied to the manufacture of the midsole of the shoe. At the same time, due to the use of recycled PET bottles as raw materials, plus the use of organic solvents in the process, to achieve health and environmental protection purposes.

[0033]

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

Domestic registration information [please note according to the registration authority, date, number order]

no

Foreign deposit information [please note according to the country, organization, date, number order]

no

no

1‧‧‧ Non-woven monofilament fiber

10‧‧‧ internal components

20‧‧‧ external components

Claims (12)

[Item 1] A spunbond nonwoven fabric comprising a non-woven monofilament fiber having a Y-shaped cross-section structure, the non-woven monofilament fiber comprising:
An internal component having a melting point of more than 220 ° C, comprising polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or polytrimethylene terephthalate Polytrimethylene terephthalate (PTT); and an external component having a melting point of less than 220 ° C, comprising polyethylene terephthalate copolymer (CoPET), polypropylene (PP) or polyfluorene Amine (PA); Wherein the inner component comprises more than 50% by weight of the non-woven monofilament fiber, and the outer component comprises less than 50% by weight of the non-woven monofilament fiber. [Item 2] The spunbonded nonwoven fabric of claim 1, wherein the polyethylene terephthalate copolymer is composed of isophthalic acid (IPA), adipic acid (AA), and Butanediol is synthesized or synthesized from isophthalic acid, adipic acid and pentanediol. [Item 3] The spunbonded nonwoven fabric of claim 1, wherein the non-woven monofilament fiber has a Y-shaped cross-sectional diameter of from about 5 μm to about 100 μm. [Item 4] The spunbond nonwoven fabric of claim 1, wherein the non-woven monofilament fibers have an anisotropy ratio greater than about 0.8. [Item 5] The spunbonded nonwoven fabric of claim 1, wherein the non-woven monofilament fiber is hollow. [Item 6] The spunbonded nonwoven fabric of claim 1, wherein the non-woven monofilament fiber is produced by a spinning device having a multi-layered plate flow distribution plate. [Item 7] The spunbonded nonwoven fabric of claim 6, wherein the non-woven monofilament fiber is mixed in the spinning device via the inner component and the outer component, and has a two-stage temperature and one or two The segmental pressure is drawn through a slit and cooled to achieve a crystallinity of about 60% to about 90%, wherein:
The two-stage temperature system is from about 35 ° C to about 45 ° C and from about 21 ° C to about 31 ° C; The two-stage pressure system is from about 15 mbar to about 25 mbar and from about 1.0 bar to about 1.5 bar, respectively. [Item 8] The spunbonded nonwoven fabric of claim 7, wherein the spunbonded nonwoven fabric is formed by collecting a plurality of the non-woven monofilament fibers into a mesh shape, and is subjected to hot air treatment at about 190 ° C to about 230 ° C, and is subjected to about 150 Manufactured to a pressure roller of about 210 degrees. [Item 9] The spunbonded nonwoven fabric of claim 1, wherein the spunbonded nonwoven fabric has a thickness of from about 0.1 mm to about 3.0 mm. [Item 10] The spunbonded nonwoven fabric of claim 1, wherein the spunbond nonwoven fabric is used for making a midsole.