TW201430179A - Woven fabric having filaments with a pentagram cross-section - Google Patents

Abstract

A woven fabric includes a plurality of interlaced multifilament yarns, wherein at least one of the multifilament yarns includes first and second filaments having a pentagram cross-section, and the first and second filaments have a degree of modification between 1.4 and 2.6. The woven fabric has at least one surface calendered so that at least part of the multifilament yarns are compressed and the first and second filaments interlock with one another to retain low air permeability after repeated washing.

Description

Fabric with pentagonal cross section and long fibers

The present disclosure relates to a fabric having a pentagonal cross section long fiber, and more particularly to a fabric having a long fiber having five projections and recesses and having a low air permeability after repeated washings.

Fabrics used on the outer or inner surface of garments (eg, down jackets) must have low air permeability to prevent the down jacket from escaping into the down jacket and causing the feathers to escape as the down jacket is squeezed or expanded during use. In order to achieve low air permeability, the prior art generally employs the technique of increasing the density of the fabric and calendering the fabric to compress the long fibers to reduce the gap between the long-fiber yarns; for example, the technique disclosed in U.S. Patent Publication No. US 2011/0302689.

However, the prior art (increasing the density of the fabric and calendering the fabric) can be easily implemented to control the air permeability, but the fundamental problem is that the long-fiber yarn is easily broken during processing, and thus the yield is lowered. In addition, even if the fabric prepared by the prior art has a low initial gas permeability, it is difficult to maintain such a low gas permeability because the folding, expansion, shrinkage, etc. of the daily folding, washing, and the like are applied to the fabric as the use time increases. The force expands the gap between the long fiber yarns. In this way, the down jacket of the down jacket is easy to escape and disappear.

The present disclosure provides a fabric having a long fiber with a pentagonal star section, after multiple passes It still has low air permeability after washing.

An embodiment of the fabric of the present disclosure comprises a plurality of staggered multifilament filament yarns, wherein at least one of the multifilament filament yarns comprises a first filament and a second filament, having a pentagonal star a section, wherein the first filament and the second filament have a degree of modification between 1.4 and 2.6, and at least one side of the fabric is calendered, whereby the multifilament filament yarn is at least The portion is compacted, and the first filament and the second filament are interlocked with each other to have low gas permeability after repeated washing.

Since the fabric adopts a design in which the adjacent first filament and the second filament are interlocked with each other, the multifilament filament yarn of the fabric is tightly bundled, whereby the fabric retains considerable after repeated washings Low air permeability.

The technical features and advantages of the present disclosure have been broadly described above, and the detailed description of the present disclosure will be better understood. Other technical features and advantages of the subject matter of the claims of the present disclosure will be described below. It will be appreciated by those skilled in the art that the present invention may be practiced with the same or equivalents. It is also to be understood by those of ordinary skill in the art that this invention is not limited to the spirit and scope of the disclosure as defined by the appended claims.

10‧‧‧ fabric

10A‧‧‧ vertical line

10B‧‧‧ horizontal line

11‧‧‧ convex

13‧‧‧ recess

1A-1G‧‧‧Long fiber

2A-2F‧‧‧Long fiber

3A-3C‧‧‧Long fiber

D‧‧‧ longest diameter

d‧‧‧Short diameter

The technical features and advantages of the present disclosure are fully understood by reference to the foregoing description and the accompanying drawings.

1 is a schematic plan view showing a fabric of an embodiment of the present invention; FIG. 2 is a perspective view showing a synthetic long fiber of the fabric of FIG. 1; FIG. 3 is a perspective view showing two adjacent long fibers in the fabric of FIG. A schematic perspective view of a multifilament filament yarn of the fabric of Fig. 1 before calendering; Figure 5 is an electron micrograph of the multifilament filament yarn (pentagonal cross section long fiber) of the fabric of Figure 1 after calendering, and Figure 6 is an electron microscopic image after washing 50 times; 7 electron microscopic images of the multifilament long-fiber yarn (Y-shaped cross-length filament) of the comparative example fabric after calendering, FIG. 8 is an electron microscopic image after washing 50 times; and FIG. The electron microscopic image of the multifilament long-fiber yarn (single-length long fiber) of the comparative example fabric after calendering, and FIG. 10 is the electron microscopic image after washing 50 times;

Detailed steps and structures are set forth in the following description in order to provide a thorough understanding of the invention. Obviously, the implementation of the present invention is not limited to the specific details of those skilled in the relevant art. On the other hand, well-known structures or steps are not described in detail to avoid unnecessarily limiting the invention. The preferred embodiments of the present invention are described in detail below, but the present invention may be widely practiced in other embodiments, and the scope of the present invention is not limited by the scope of the appended claims. .

The embodiments disclosed herein are incorporated in the drawings to explain the details. The "embodiment", "this embodiment", "other embodiment" and the like referred to in the specification are intended to include the specific features, structures, or characteristics described in the embodiment of the present invention. The phrase "in this embodiment" as used throughout the specification is not necessarily referring to the same embodiment.

The present disclosure relates to a fabric having a pentagonal cross section long fiber which retains a relatively low air permeability after repeated washings. The following description explains the implementation steps and structures of the disclosure so that this disclosure will be fully understood. Implementations of the present disclosure are not limited to those having ordinary knowledge with specific knowledge. In addition, the structures and steps of the prior art are not described below, so as not to unnecessarily limit the disclosure. The preferred embodiments of the present disclosure will be described hereinafter, but the present disclosure may be widely implemented in other embodiments in addition to the following. The scope of this disclosure should not be limited to the following description, but should be determined by the scope of the patent application. Righteousness.

Figure 1 illustrates a plan view of a fabric 10 of an embodiment of the present disclosure. In one embodiment, the fabric 10 comprises a plurality of longitudinal threads 10A and transverse threads 10B that are interlaced with each other, wherein the longitudinal threads 10A and the transverse threads 10B are multifilament filament yarns having a plurality of synthetic filaments. It will be appreciated by those of ordinary skill in the art that the fabric 10 can be prepared by any suitable weaving technique, such as plain weave, twill weave or satin weave, in addition to the weave pattern shown in FIG. In one embodiment, the density (warp density or weft density) of the fabric 10 is between 120 and 290 yarns/2.54 cm; preferably between 130 and 290 yarns/2.54 cm. .

2 is a perspective view showing the synthetic filament of the fabric 10 of FIG. 1. In one embodiment, the synthetic filament of fabric 10 of Figure 1 has a pentagonal star profile with a major axis length (longest diameter, D) and a minor axis length (shortest diameter, d) that can be used at a particular magnification using an optical microscope. The measurement is made below, and the ratio of the length of the main shaft (D) to the length of the minor axis (d) can be calculated. The average of the ratio of the length of the major axis (D) of the plurality of long fibers to the length of the minor axis (d) is defined as the degree of modification. In one embodiment, the length of deformation of the filaments is between 1.4 and 2.6; preferably between 1.4 and 2.0.

A plurality of multifilament filament yarns having a length of 10,000 m were prepared, and the average weight (g) thereof was measured, and this average weight was defined as the fineness of the multifilament filament yarn. In one embodiment, the multifilament filament yarn has a denier between 5.5 and 79.0 dtex; preferably between 7.7 and 44.0 dtex. In one embodiment, the multifilament filament yarn having 20 pentagonal cross-section long fibers has a fineness of 22 dtex, wherein the fineness of the monofilament pentagonal cross-section long fiber is defined as the multifilament long-staple yarn. The fineness of the line is divided by the number of long fibers of the pentagonal star section. In one embodiment, the fineness of the monofilament pentagonal cross section filament is 1.1 dtex.

Figure 3 illustrates a perspective view of two adjacent filaments in the fabric 10 of Figure 1. In one embodiment, each of the long fibers has five convex portions 11 , and at least one convex portion 11 of the long fibers is wedged between the two convex portions 11 of the adjacent long fibers. In an embodiment, each filament has 5 recesses 13 located at Between the two convex portions 11; at least one convex portion 11 of the long fiber is wedged into the concave portion 13 of the adjacent long fiber.

Figure 4 illustrates a perspective view of a multifilament filament yarn of the fabric 10 of Figure 1 prior to calendering. In one embodiment, the multifilament filament yarn comprises a plurality of long fibers 1A-1G disposed on the first layer, a plurality of long fibers 2A-2F disposed on the second layer, and a plurality of strips disposed on the third layer. Long fiber 3A-3C. In one embodiment, the three long fibers 1B, 2A, and 3A of the multifilament filament yarn are adjacent to the long fiber 2B, and the three long fibers 1B, 2A, 3A and the long fiber 2B are interlocked with each other; The four long fibers 1D, 2C, 2E, and 3C of the multifilament long fiber yarn are adjacent to the long fiber 2D, and the four long fibers 1D, 2C, 2E, 3C and the long fiber 2D are interlocked with each other.

In a preferred embodiment, the movement of the pentagonal cross-section filaments is limited by at least one laterally adjacent filament and a longitudinally adjacent filament. For example, the long fiber 1C is laterally adjacent to the long fiber 1B and is longitudinally adjacent to the long fiber 2C, wherein one of the five convex portions of the long fiber 1C is wedged between the two convex portions of the long fiber 1B. And the other convex portion of the long fiber 1C is wedged between the two convex portions of the long fiber 2C. In addition, one of the five convex portions of the long fiber 1C is wedged between the two convex portions of the long fiber 1D, and one of the five convex portions of the long fiber 1D is wedged into the two convex portions of the long fiber 1C. Between the ministries.

For the two laterally adjacent long fibers 1B, 1C, a convex portion of the long fiber 1C is wedged between the two convex portions of the long fiber 1B, which not only limits the longitudinal movement of the long fiber 1C, but also the longitudinal movement of the long fiber 1C. The lateral movement of the filament 1C is limited. Similarly, for two longitudinally adjacent filaments 1C, 2C, a convex portion of the filament 1C is wedged between the two protrusions of the filament 2C, which not only limits the longitudinal movement of the filament 1C, The lateral movement of the long fiber 1C is also limited. Therefore, the movement of the pentagonal cross section of the multifilament filament yarn is restricted. If at least three of the five convex portions of the pentagonal cross section long fiber are wedged between the convex portions of three adjacent long fibers, the movement of the pentagonal star-shaped long fiber is further restricted.

Fig. 5 is a scanning electron microscope (SEM) of the multifilament filament yarn of the fabric 10 of Fig. 1 after calendering, and Fig. 6 is an electron microscopic image after washing 50 times. Finished woven fabrics are usually refinished (scour), scaled and added After the work (relax), predetermined type processing (preset), and dyeing processing, the final processing is usually carried out using a specific processing machine to form a thin fabric. In one embodiment, at least one side of the fabric 10 is calendered whereby the multifilament filament yarn is at least partially compressed and the included five-corner star-length filaments are interlocked with one another.

By performing calendering on at least one side of the fabric 10, the pentagonal cross-section filaments of the multifilament filament yarn are compacted and in a specific state, wherein the multifilament filament yarn contains the five corners The star-shaped long fibers at least partially overlap each other. In one embodiment, the temperature at which calendering is performed is not limited, and is preferably higher than the glass transition temperature of the raw material of the pentagonal cross section long fiber, but lower than the melting point of the raw material.

The pressure of the calendering process can be set such that the convex portion of the pentagonal cross-section long fiber on the upper side of the woven fabric 10 becomes flat. In one embodiment, the calendering of the fabric 10 can be accomplished using a roller table. After the calendering process, the multifilament filament yarn of the fabric 10 is tightly bundled, whereby the fabric 10 retains a relatively low air permeability after repeated washings.

In the present disclosure, the test method for the air permeability is based on JIS 1096 8.26.1A, and the fabric of the embodiment of the invention (Fig. 5 - Fig. 6) and the fabric of the comparative example (Fig. 7 - Fig. 10) are objectively evaluated. Breathability. The following table summarizes the test results of the fabric of the examples of the present invention and the fabric of the comparative example.

As shown in the above table, the fabrics of the examples of the present invention and the fabrics of the comparative examples have approximately the same initial gas permeability. However, the air permeability of the fabric of the comparative example was greatly increased after the washing for 50 times, and the air permeability of the fabric of the Y-shaped section long fiber was increased by about 2 times, and the air permeability of the fabric of the in-line section of the long fiber was increased. It is about 5 times, and the air permeability of the fabric of the embodiment is substantially maintained at the same level. Obviously, the multifilament filament yarn of the fabric of the example is tightly bundled by the pentagonal cross section long fibers, whereby the fabric retains a relatively low air permeability after repeated washings.

The technical content and the technical features of the present disclosure have been disclosed as above, but those skilled in the art should understand that the teachings and disclosures of the present disclosure are disclosed without departing from the spirit and scope of the disclosure as defined by the appended claims. Can be used for various substitutions and modifications. For example, many of the processes disclosed above may be implemented in different ways or in other processes, or a combination of the two.

Moreover, the scope of the present invention is not limited to the particular process, machine, manufacture, composition, means, method or method of the particular embodiments disclosed. It should be understood by those of ordinary skill in the art that, based on the teachings of the present disclosure, the process, the machine, the manufacture, the composition of the material, the device, the method, or the steps, whether present or future developers, The revealer performs substantially the same function in substantially the same manner, and achieves substantially the same result, and can also be used in the present disclosure. Accordingly, the scope of the following claims is intended to cover such <RTIgt; </ RTI> processes, machines, manufactures, compositions, devices, methods or steps.

11‧‧‧ convex

13‧‧‧ recess

Claims (7)

A fabric comprising a plurality of staggered multifilament filament yarns, wherein at least one of the multifilament filament yarns comprises a first filament and a second filament, having a pentagonal star section, wherein the The length of modification of a long fiber and the second filament is between 1.4 and 2.6, at least one side of the fabric is calendered, whereby the multifilament filament yarn is at least partially compacted, and The first filament and the second filament are interlocked with each other. The fabric according to claim 1, which has a gas permeability equal to or less than 0.5 cc/cm ² /s after 10 washings, and a gas permeability after washing 20 times equal to or less than 0.6 cc/cm ² /s, or 50 times The air permeability after washing is equal to or less than 0.7 cc/cm ² /s. The fabric of claim 1, wherein the first filament and the second filament have a degree of deformation between 1.4 and 2.0. The woven fabric of claim 1, wherein the first long fiber and the second long fiber are adjacent to each other and each has five convex portions, and at least one convex portion of the first long fiber is wedged into the second long fiber Between the convex portions, at least one convex portion of the second long fiber is wedged between the two convex portions of the first long fiber. The fabric of claim 1 wherein the multifilament filament yarn has a fineness between 5.5 and 79.0 dtex. The fabric of claim 5, wherein the multifilament filament yarn has a titer between 7.7 and 44.0 dtex. The fabric of claim 1 having a density of between 130 and 290 yarns per 2.54 cm.