JPH01221538A - Ribbonlike material - Google Patents

Abstract

PURPOSE:To obtain a ribbonlike material not stretching even by applying tension to the material, by dividing a ribbonlike material into plural sections by entangled parts made at spots of the ribbonlike material separated at intervals and comprising two groups of filaments wherein one group alternately expands in the direction perpendicular to longitudinal direction. CONSTITUTION:Filaments constituting a ribbonlike material 1 have entangled parts 2 of interwinement and each filament is not separated during handling. In sections 3 made between the entangled parts 2, the ribbonlike material comprise filaments f1 and f1' of a first group which are arranged in longitudinal direction and preferably twisted and filaments f2 and f2' of a second group which are expanded in the direction perpendicular to the longitudinal direction. A filament belonging to the filaments of the first group in one section is made to belong to the filaments of the second group in another section so that the whole length of each filament constituting the ribbonlike material 1 is uniformed. The ribbonlike material is obtained by a device to make a material bulky, equipped with a tubular passageway having a high-pressure gas feed hole.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a string-like body (bulky yarn) obtained by defibrating a bundle of a large number of filaments, which is new and hitherto unknown.

[Prior Art] A gas supply method in which a bundle of fibers such as glass fibers (hereinafter referred to as a fiber bundle) is continuously supplied to a bulking device including a tubular passage, and holes are opened in the passage or the outlet of the passage. The manufacturing method of bulky yarn, in which high-pressure gas is blown through the holes and fiber bundles are defibrated into individual fibers by the action of this high-pressure gas, is widely known.
The bulky yarn thus obtained has good heat insulation properties and is used for various purposes.

[Problem to be solved by the invention] Conventional bulky yarns have the following problems.

When tension is applied to bulky yarn, the part that is opened and swells in the direction perpendicular to the longitudinal direction (bulky part)
will stretch and lose its bulkiness.

Since it is necessary to apply tension to the warp and weft yarns during the weaving process of woven fabrics, conventional bulky yarns have problems such as loss of bulkiness when used as materials for woven fabrics.

Composite yarns in which bulky yarns are wound around core yarns have also been proposed, but the manufacturing process is complicated, and such composite yarns have the disadvantage that the core yarns separate during handling.

An object of the present invention is to provide a bulky string-like body that does not stretch even when tension is applied, does not separate during handling, and has a simple manufacturing process.

[Means for Solving the Problems] In order to achieve the above object, in the string-like body of the present invention, the string-like body l consisting of a large number of filaments has the following configuration.

Intertwined portions 2 in which the filaments constituting the string-like object 1 are intertwined are formed at spaced apart locations of the string-like object 1, and the string-like object 1 is divided into a plurality of sections 3 by the intertwined sections 2. 3, the string-like body 1 includes a first group of filaments f1 that are aligned in the longitudinal direction of the string-like body I, and a first group of filaments f2 that are disentangled and swell in a direction perpendicular to the longitudinal direction. The filaments that bend to the first group filaments in a certain section are made to belong to the second group filaments in other sections so that the total length of each filament constituting the string-like body is equal.

Next, the present invention will be explained in more detail.

Examples of filaments constituting the string-like body of the present invention include glass fibers, alumina fibers, silica fibers, zirconia fa
M, inorganic fibers such as titania fibers, organic fibers such as Kefra fibers, metal fibers such as brass fibers, carbon fibers, or composite fibers made by blending these can be used, but glass GI fibers or glass can be used. It is preferable to use composite fibers mainly composed of fibers.

It is suitable that the thickness of the fibers is 3 to 30 JL, preferably 5 to 25 tiles, and a sizing agent is added to these fibers.
~100,000, preferably 200~so, ooo
By selecting bulking conditions such as aligning the wood to form a fiber bundle and bulking such a fiber bundle by increasing the supply speed to the bulking device, a tubular passage having a high-pressure gas supply hole is provided. The string-like body of the present invention can be wrapped using a bulking device.

As the sizing agent, it is preferable to use a material with low adhesive strength such as epoxy resin, and the amount added is 0.1 to 10 wt%, preferably 0.2 to 5 wt% as a solid content.
It is appropriate to

In the string-like body 1 of the present invention, tangled portions 2.2 are formed in which the filaments constituting the string-like body are intertwined at locations separated by a predetermined interval in the longitudinal direction.

In the tangled portion 2, the filaments are intertwined in the form of a braid in the form of a monofilament or in a state in which a plurality of filaments are aligned, and due to this intertwining, the filaments are slightly twisted.

By forming this entangled portion 2, the filaments constituting the string-like body 1 are bonded together so as not to be separated from each other.

The distance between the entangled portions 2 is suitably 1 to 30 mm, preferably 3 to 150 mm. If this length is too small, the proportion of the entangled portion 2 in the entire length of the string-like body becomes large, and the bulkiness of the string-like body 1 becomes poor. Moreover, if this length is too large, the filaments of the first group and the filaments of the second group tend to separate.

The length of the entangled portion 2 is 0.1 to 5 mm, preferably 0.1 to 5 mm.
A suitable value is 2 to 3 mm. If this length is too large, the bulkiness of the string-like body 1 will be poor, and if this length is too small, the filaments constituting the string-like body 1 will easily separate.

The string-like body 1 is divided into a plurality of sections 3, 3, . . . by the entangled portion 2. In the section divided and partitioned by the entangled portion 2, the string-like body 1 has a first group of filaments f1 aligned in the longitudinal direction of the string-like body and preferably twisted.
and a second group of filaments f which are preferably opened into a monofilament shape and expanded in a direction perpendicular to the longitudinal direction.
Contains 2. The filaments belonging to the second group are defibrated and swell outward in a substantially arc shape from the axis (longitudinal direction of the string-like body) connecting the tangled parts, and are preferably defibrated into a monofilament shape. Note that the direction of this bulge is not limited to a specific plane including the axis, but is random. It is appropriate that the maximum distance of this bulge from the axis is approximately 2 to 10+ nm.

The filaments belonging to the first group are aligned in the longitudinal direction. The filaments are preferably twisted in the S direction or the Z direction, and this twist improves the integrity of the filaments belonging to the first group.

When focusing on a specific section, the length of the filament f belonging to the first group is shorter than the length of the filament f2 belonging to the second group, and when tension is applied to the string-like body, the filament f□ belonging to the first group , to counteract the tension.

The filament f2 belonging to the second group is longer than the filament f1 belonging to the first group, curves outward from the longitudinal direction, and does not itself compete with the tension, but this filament f2 is longer than the filament f1 belonging to the first group. and entangling part 2
The tension applied to the string-like body 1 is absorbed by the filament f1 belonging to the first group, so even if tension is applied to the string-like body 1, the length of this section is the same as that of the filament belonging to the first group. The filament f2 belonging to the second group is not stretched substantially beyond the length fI and loses its bulkiness.

It is appropriate that the number of filaments belonging to the first group be 10 to 50% of the total number of filaments.

If this number is too large, the bulkiness of the string-like body 1 will be poor, and if this number is too small, the strength in the longitudinal direction of the string-like body 1 will tend to decrease.

When focusing on a particular section, the filament f1, indicated by a broken line belonging to the first group, and the filament f2, indicated by a solid line belonging to the second group, intertwine and intermingle at the tangled portion at the end of this section. In the next section, the filament f0' belongs to the first group and the filament f2' belongs to the second group.

At least a part of this Rt I moves to f2' and the second
At least part of f2 transitions to f1' and comes to belong to the first group. This kind of transition to a different group (change of affiliation) is done randomly.If we focus on a certain filament, the number of times this filament belongs to the first group and the number of times it belongs to the second group in each section are almost equal. Therefore, the total length of each filament constituting the string-like body is equal.

Note that the direction of twist given to the filaments of the first group is reversed in some places, and the number of twists in the S direction and the number of twists in the Z direction in the string-like body as a whole is approximately equal, causing twisting in the string-like body. Never.

A reversal of the twist direction may also occur within a section, in which case a small length of untwisted portion may occur in this reversal.

Note that the filaments belonging to the first group may swell slightly outward at such inverted portions, but this swell is extremely small compared to the swell of the filaments of the second group, and the above-mentioned string-like It does not affect the countervailing force to the tension applied to the body.

In addition, the length of the tangled part, the distance between the tangled parts, the number of filaments belonging to the first group in each section, the degree of swelling of the filaments belonging to the second group, etc. are set to constant values over the entire length of the string-like body. It is practically meaningless to control these values within the above-mentioned ranges, and the object of the present invention can be sufficiently achieved.

Furthermore, although the string-like body of the present invention can be made of relatively soft IS such as glass fiber or organic m-fiber, it can also be made of brittle fiber such as silica fiber, and has a tensile strength that has not been obtained conventionally. It is possible to hang a string-like body that does not lose its bulky properties even when given a high heat resistance.

The string-like body of the present invention can be used as a heat-insulating cloth used in a plate glass bending process, a catalyst carrier, and a backing material as it is or in the form of a braided string.

[Function] Since the string-like body of the present invention has a tangled portion in which the filaments are entangled, separation of the filaments during handling is prevented.

In addition, in the section formed between the entwined parts, the string-like body is aligned in the longitudinal direction and preferably has a first twisted body.
a second group of filaments, preferably in the form of monofilaments, which are opened and expanded in a direction perpendicular to the longitudinal direction, and the tension applied to the string-like body is counteracted by the filaments of the first group; In order to absorb this tension, even when tension is applied, the filaments of the second group stretch and prevent the loss of bulkiness.

[Example] Using a fiber bundle made by adding 0.2 wt% of epoxy-based sizing agent as a solid content to glass fibers (filaments) with a thickness of 9 mm and bundling 400 fibers, a string-like body with the following specifications was made. Manufactured.

The average length of the entangled parts is 1 mm, the average pressure between the entangled parts is 5 mm, and the average number of filaments belonging to the first group is 1.
50 filaments belonging to the second group (average maximum distance from the longitudinal axis) 31° Even if a tension of 8 kg is applied to this string-like body, the bulkiness is not lost and the fabric is It was suitable as a cloth material.

[Effect of the invention] Even when tension is applied, the bulky property is not lost, and the product does not separate during handling.

[Brief explanation of the drawing]

FIG. 1 is an enlarged plan view for schematically explaining the structure of the string-like body of the present invention. In the figure, 1 is a string-like body, 2 is a tangled part, 3 is a section, fl+11'
is the first group filament, f2. f2' indicates the second group of filaments.

Claims (1)

[Claims] A string-like body obtained by defibrating a bundle of a large number of filaments, in which tangles are formed where the filaments constituting the string-like body are intertwined at spaces apart from each other. The string-like body is divided into a plurality of sections depending on the section, and in each section, the first group of filaments are aligned in the longitudinal direction of the string-like body, and the filaments are unraveled and expanded in a direction perpendicular to the longitudinal direction. a filament of the first group in one section and a filament of the second group in another section so that the total length of each filament constituting the string-like body is equal; A string-like body.