JPH0235061B2 - KASADAKASEIOJUSURUSENIKOZOTAI - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel fiber structure having excellent flexibility, warmth, bulk, and compression recovery properties, and particularly to a fiber structure suitable as a material for batting. Filling is generally a material that is wrapped inside the fabric of futons, cushions, and other textile products primarily for the purpose of retaining heat, and various types of such materials have been tried in the past. . For example, there are specially designed fibers that are crimped or corrugated as batting materials, but they have the disadvantage that their compression recovery properties decrease with repeated use. Another example is to create spherical bodies with low internal density from fibers and use them as batting, but repeated use causes the spherical bodies to be entangled and destroyed, reducing the effectiveness. Another example is a method in which a plurality of short fibers are concentrated and integrated at the binding site, and the non-concentrated ends of the short fibers are used as batting as tufts that are swollen and diffused. The bulkiness of the batting decreases due to the entanglement of the materials and the penetrating nature of the short fibers. The present inventors completed the present invention as a result of research on a new fiber structure that solved these drawbacks. That is, the present invention provides a fibrous structure in which branching units having at least secondary branches made of short fibers are densely packed on a dotted, linear or planar base material made of a polymeric substance. , the formation of branching units in at least two directions in the cross section of the base material, and a portion of the short fibrous substances forming the branching units cross-link with other short fibrous substances and/or the base material. The present invention relates to a bulky fiber structure characterized by forming a network structure. The present invention will be explained using the drawings. 1st, 2nd, 3rd
The figure is a model diagram of the fiber structure of the present invention. 1st
The figure shows the base material 1 in a dot shape, FIG. 2 shows the base material 1 in a linear shape, and FIG. 3 shows the base material 1 in a planar shape.
A primary branch 2 made of short fibrous material is derived from the base material 1, a secondary branch 3 is derived from the primary branch, and a tertiary branch 4 is derived from the secondary branch. 2, 3, in the primary branch
..., one n-order branched simplex is called a branching unit. Reference numeral 5 indicates a bonding point between branches, and a network structure is formed by this bonding. In the present invention, such branch units are densely packed on the substrate. 4, 5, and 6 are diagrams showing cross sections of the base material. Figure 4 shows a point-like object, Figure 5 shows a linear object, and Figure 6 shows a point-like object.
The figure shows a cross section of each sheet-like object. Figure 4 shows 3 directions, Figure 5 shows 11 directions, Figure 6 shows 2 directions.
Formation of branched units in the direction is observed. In the present invention, the cross section refers to a cross section perpendicular to the long axis in the case of a linear base material, a cross section perpendicular to the plane in the case of a planar base material, and a cross section passing through the center in the case of a dotted base material. The fibrous structure of the present invention has appropriate flexibility and lightness because the branch units are made of short fibrous materials. When viewed in cross section, the branch units are formed in at least two directions, providing bulkiness and excellent recovery performance of the compressor. A fiber structure in which branching units are formed only in one direction does not exhibit repellency or bulkiness on the side where branching units are not formed, so when used as batting, the fiber structure as a whole exhibits repulsion and bulkiness. gender decreases. When the base surfaces of planar base materials that have branching units in only one direction are in contact with each other, it seems to have the same effect as the fiber structure of the present invention, but the base material itself has branched units. Since the bulkiness is very small compared to the unit,
Overall bulkiness is significantly reduced. Further, in the fibrous structure of the present invention, short fibrous materials forming branch units are partially cross-linked with other short fibrous materials to form a network structure. Therefore, compared to the case where no network structure is formed at all, when compressed, the interpenetration of the branch units is significantly prevented, and the repellency and bulkiness are further improved.
Further, the network structure itself is a highly repulsive structure, regardless of the presence or absence of interpenetration. Such bulkiness and repellency make it possible to retain an extremely large amount of air in the voids when filled into clothing as batting, resulting in extremely high heat retention properties. In order to further demonstrate the effects of the present invention,
It is desirable that as the order of branching increases, the short fibrous material becomes shorter and thinner. The order of branching varies depending on the form of the base material, but is at least 2 or more. If the amount is less than that, heat retention, bulkiness, and compression recovery properties will not be sufficiently exhibited. If the base material is planar, it is effective even if the order is 2, but if the base material is linear or dotted, the order is preferably 3 or more. Of course, there is no problem even if branch units having only first-order branches are mixed, or branch units having different orders may be mixed. Preferably, the primary branching into the substrate 1 is substantially perpendicular to the plane of the substrate. A slight inclination is acceptable, but in order to avoid spaces without branching units and obtain a structure with good properties, it is preferable that they be substantially perpendicular to the surface and at approximately equal intervals. The positions of the molecular units may be staggered, aligned, or random. When the base material is in the form of dots, it is preferable that the base material is branched out just like a sparkler is branched out around a fireball. When the base material is linear, assuming a plane perpendicular to the axis, it is preferable that the direction of the branch unit extends over the entire 360° circumference. When the base material is planar, branch units are usually present on both sides in order to satisfy the requirements of the present invention. When such a structure is cut into long pieces, it becomes a structure having a linear base material. The base material in the present invention basically corresponds to any polymeric material that can take the form of fibers. That is, it includes natural fibers, man-made fibers, synthetic fibers, semi-synthetic fibers, carbon fibers, glass fibers, and the like. The same applies to the short fibers to be implanted. The shape of the base material includes any of the shapes of points, lines, and planes, but the terms "points, lines," and "planes" mentioned here are, of course, not abstract concepts in geometry, but points refer to a certain spatial spread. A line refers to a single yarn, filament yarn, spun yarn, or other fibrous material with a certain thickness, and a plane refers to a woven fabric, knitted fabric, or other fibrous material with a certain thickness. Refers to nonwoven fabrics, sheets, etc. As substrates it is possible to use, for example, monofilaments, non-woven fabrics, as well as spun yarns, multifilaments, split yarns,
Woven fabrics, knitted fabrics, net-like materials, flat tows,
Tops are used in the form of dots, lines, or areas. The base material and the short fibrous material may be, for example, synthetic fibers such as polyamide yarn, polyester yarn, or polyacrylic yarn, recycled fibers such as rayon, natural fibers such as wool, or combinations thereof. Glass fibers can also be used. The length of the linear base material is preferably about 1 to 10 cm; if it is longer than this, the base materials may become entangled with each other during repeated use as futon filling, which is undesirable. 1
The length of the secondary branched short fibers is preferably in the range of 0.5 to 3 cm, and the length of the secondary branched short fibers is suitably about 0.01 to 0.3 cm. However, in the present invention, the lengths of the base material, primary staple fibers, and secondary staple fibers are not specified. This is because, in the present invention, it is possible to obtain feather-like characteristics by varying the length, but it does not preclude obtaining characteristics other than feather-like characteristics. For the same reason, the denier and flocking density of the fibers used are not specified. Although the angle between the base material and the fibers is not particularly defined, it is preferably 30 to 80 degrees in order to improve the fit to the human body, that is, to impart feather-like characteristics. An example of the method for manufacturing the fiber structure of the present invention is as follows. After applying an adhesive such as an epoxy, urethane, chloroprene, or vinyl acetate adhesive onto the base material, short fibrous materials are flocked by electrostatic flocking or the like. This is the first branch. Next, an adhesive is applied to both the base fabric and the primary branches, and the short fibers are flocked. At this time, the fibers are mainly planted on the primary branches, but also on the base fabric. Some short fibrous materials are
It adheres to both the primary branch and the base fabric, forming a cross-linked network structure as referred to in the present invention. Next, after applying adhesive to the base fabric, primary branches, and secondary branches, short fibrous material is electrostatically flocked to form tertiary branches, and at the same time new primary branches, 2 Secondary branches are also formed and cross-links are formed. At this time,
The degree of formation of these can be adjusted by adjusting the method of applying adhesive to the base fabric and primary branches. By repeating such operations, branches of arbitrary order can be obtained. Another example is a method in which a knitted fabric raised by a needle cloth raising machine or the like or a raised spun yarn is used as a base material, and secondary and tertiary branches are flocked by the above-mentioned bonding method. The fiber structure constructed in this manner is flexible, has high heat retention properties, is bulky, and has excellent compression recovery properties, and is particularly useful as a material for batting. Next, the present invention will be specifically explained with reference to Examples. Example 1 Both the base material and short fibers are made of polyamide synthetic fibers, and the base material is made of 130d monofilament.
The primary branch is 25 d thick and 10 mm long, and the secondary branch is 15 d.
The short fiber was 8 mm, and the tertiary branch was 0.75 d 1.2 mm.
Acrylic acid ester resin was used as the adhesive, and the base material was continuously impregnated with the adhesive solution, and the liquid was squeezed out using a roller. The adhesive was applied to the primary and secondary branches made of short fibers by spraying the adhesive, and the short fibers were flocked by electrostatic flocking. The product obtained in this way has a structure in which first, second, and third-order branches of short fibers are sequentially derived from a 130 d monofilament, and has a network structure due to cross-linking of short fibers. Branching units were derived over the entire circumference. This material was bulky, resilient, and had appropriate softness. The performance of this product is shown in Table 1. Comparative Example 1 Primary branches were formed on the base material according to Example 1,
An adhesive was then applied to the primary branch to form a secondary branch, and an adhesive was applied to the secondary branch to form a tertiary branch. This is a 130d monofilament with 1st, 2nd, and 3rd branches of short fibers derived in sequence.
It did not have a network structure due to cross-linking of short fibers. The performance of this product is shown in Table 1. Example 2 The same fabrics 1, 2, and 3 as in Example 1 were prepared using a polyester synthetic fiber net fabric made of 150d 50 filaments having meshes at 5 mm intervals in both warp and weft as a base material.
The next branches were successively implanted on both sides of the base material using the electrostatic flocking method. The obtained product had bulkiness similar to that of Example 1,
It is repellent, and by cutting it appropriately, it can be sewn into clothing as a heat insulator.
By chopping the material into pieces at intervals of 5 mm in the warp and weft directions approximately at the base material stitch intersection, a branched fiber structure with a network structure that can be used for the same purpose as cotton feathers was obtained. The performance of this product is shown in Table 1. Comparative Example 2 On the base material of Example 2, the same 1 as in Example 1,
Second and third-order branches were successively transplanted by electrostatic flocking.
At this time, flocking was performed only on one side of the base material.
In addition, similar to Comparative Example 1, hair transplantation was carried out sequentially.
The results are shown in Table 1. Example 3 For the base material, a 36-count double-spun yarn consisting of 40% 3D acrylonitrile synthetic fiber that shrinks 25% with water vapor at 100°C and 60% 3D non-shrinkable acrylonitrile synthetic fiber was used. After shrinking with steam at 100°C, it was raised using a needle cloth raising machine. The average length of the fluff was 15 mm, excluding fluff that was less than 3 mm. This fluff was used as a primary branch, and the same secondary and tertiary branches as in Example 1 were implanted in the same manner as in Example 1. As a result,
A branched fiber structure was obtained in which branch units were derived all around the base material and had a bulky, repulsive network structure.

【table】

【table】 [Brief explanation of drawings]

Fig. 1 is a model diagram of a fibrous structure formed on a dotted base material of the present invention, Fig. 2 is a model diagram of a fibrous structure formed on a linear base material of the present invention, and Fig. 3 is an aspect of the present invention. FIG. 3 is a model diagram of a fibrous structure formed on a shaped base material.
Fig. 4 is an example of a cross-sectional view of a fibrous structure formed on a dotted base material, Fig. 5 is an example of a cross-sectional view of a fibrous structure formed on a linear base material, and Fig. 6 is an example of a cross-sectional view of a fibrous structure formed on a linear base material. An example of a cross-sectional view of a fiber structure formed in FIG. 1...Base material, 2...1st branch, 3...2nd branch, 4...3rd branch, 5...cross-linkage.

Claims (1)

[Claims] 1 A fibrous structure in which branching units having at least secondary branches made of short fibers are densely packed on a dotted, linear or planar base material made of a polymeric substance, which Formation of branching units is recognized in at least two directions on the surface, and a part of the short fibrous substances forming the branching units are separated from other short fibrous substances and/or
Or, a bulky fibrous structure characterized by being cross-linked with a base material to form a network structure.