JP3157711B2 - Sound absorbing cloth and sound absorbing curtain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of sound-absorbing materials, and more specifically, a sound-absorbing cloth capable of realizing a curtain, a roll blind, a tapestry, a ceiling film, etc. having excellent sound-absorbing characteristics and nonflammability. The present invention relates to a sound absorbing curtain using the sound absorbing cloth.

[0002]

2. Description of the Related Art Conventionally, various types of porous materials such as glass wool, metal fibers, and metal sintered materials are mainly used as sound absorbing materials, and are used as panels which are mounted on a wall or the like. . Therefore, these conventional sound-absorbing materials require processing costs for paneling in addition to the cost of the sound-absorbing materials themselves, resulting in extremely high costs.

[0003] In addition to the flat space, the sound absorbing material
It is also necessary to attach it to parts where piping and wiring are complicated, such as in factories and ships, as well as curved parts and parts with complicated shapes. However, with the conventional panel-shaped sound absorbing material, it is difficult to install the sound absorbing material in a position where such a sufficient space cannot be ensured in a good state, which increases the cost for mounting and further processes the sound absorbing material. Often it is necessary. In addition, a predetermined sound absorbing characteristic cannot be obtained in many cases depending on the state of attachment.

Further, in a music room such as a piano room or a music listening room, a gymnasium, or the like, it is preferable to attach a sound absorbing material to doors, windows, and the like. However, in a conventional panel-shaped sound absorbing material,
It is difficult to attach or detach the window, and if a sound absorbing material is incorporated into a window or the like and fixed, the window becomes unusable.

Therefore, processing such as paneling is not required; it can be easily installed even in a complicated place or a place having a complicated shape, and a desired sound absorbing property can be exhibited; storage can be made easily by folding or winding. There is a demand for the appearance of a cloth-shaped sound absorbing material (sound absorbing cloth) which can be easily and easily used for windows and the like. Also,
If an excellent sound-absorbing cloth is realized, it is expected that it will be used in applications where general-purpose cloths made of synthetic fibers and natural fibers are used, such as curtains and roll blinds.
It is desirable to have excellent nonflammability in disaster prevention.

Conventionally, it has been known that ordinary drape curtains used in houses, gymnasiums, and the like also have a certain sound absorbing effect, but it is well known that the sound absorbing characteristics are not satisfactory. In addition, since these are made of polyester, acrylic, rayon, cotton, hemp, or blends or blends of these, that is, organic fibers, they eventually burn even if subjected to a flame retardant treatment. Is not satisfactory.

It is also known that a material obtained by impregnating 100 g / m ² or more of polytetrafluoroethylene into a glass cloth (about 360 g / m ² ) made of glass fiber has a certain sound absorbing effect. However, its sound absorbing properties are not satisfactory either. Moreover, this material is not inflammable because of its high resin impregnation amount, and because the product itself is hard, it does not have the flexibility and drape property of cloth materials, and is used as a general-purpose cloth material that realizes curtains and the like. It is not possible.

Further, after cutting a glass filament into a length of 10 mm to 50 mm, the web is hanged on a card to form a web, and a needle is formed into a felt shape. It is also said that felts obtained by applying a felt to have a sound absorbing effect. However, when using 100% glass fiber, not only the felt cannot be made uniform, but also when the obtained felt is expanded or contracted or folded. Since the felt part is a short fiber, detachment of the short fiber from the tissue is remarkable.
It cannot be used as a general-purpose cloth material for implementing a curtain or the like.

Further, there has been an attempt to increase the apparent thickness and obtain a certain level of sound absorption characteristics by performing needle processing on a glass cloth woven using a normal glass thread. The cloth is severely damaged, the mechanical strength is not sufficient, and there is a problem such as detachment of a single fiber, which causes a problem in practical use as a cloth material.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to improve the flexibility and droop property of general-purpose cloth and the mechanical strength such as tensile strength. It can be treated in the same way as cloth (cloth material) made of conventional synthetic fibers such as polyester and acrylic, and natural fibers such as cotton and hemp, and has excellent sound absorbing properties and nonflammability. Another object of the present invention is to provide a sound-absorbing curtain (such as a drape curtain and an accordion curtain), a sound-absorbing roll blind, a sound-absorbing cloth capable of realizing a sound-absorbing tapestry, and a sound-absorbing curtain using the sound-absorbing cloth.

The present inventors have conducted intensive studies to solve the above problems, and as a result, focused on the incombustibility and flexibility of long glass fibers, and obtained a bulky processed yarn obtained by subjecting long glass fibers to bulky processing.
The present inventors have found that a cloth material satisfying the above-mentioned properties, that is, a sound-absorbing cloth can be realized by using a glass filament which is not bulked , and the present invention has been accomplished. That is, sound absorption cross invention, a bulked yarn formed by subjecting a bulking which made inflate the long glass fibers by blowing compressed air into long glass fibers, Do is bulked
A sound-absorbing cloth characterized by being woven using long glass fibers, having a mass of 400 g or more per 1 m ^2.
And the air permeability is 3 to 30 ([cm ³ / cm ² ] / sec; 12
(4.5 Pa) .

Further, in the sound absorbing cloth of the present invention ,
Be monofilaments nominal diameter before Symbol bulked yarn is 3Myuemu～9myuemu, it is, respectively is preferred use ratio of the bulked yarn is 40% by weight or more.

Further, the sound absorbing curtain of the present invention provides a sound absorbing curtain obtained by sewing the sound absorbing cloth of the present invention.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sound absorbing cloth and the sound absorbing curtain of the present invention will be described below. The sound-absorbing cloth of the present invention uses a bulky yarn obtained by blowing compressed air onto glass long fibers and expanding the glass long fibers, that is, a bulky processed yarn obtained by performing so-called bulky processing, and a glass long fiber that is not bulky processed , and preferably bulky processing. It is woven using 40% by weight or more of yarn and has a mass of 400 g or more per 1 m ^2.
And the air permeability is 3 to 30 ([cm ³ / cm ² ] / sec; 124.5P
a) is a sound absorbing cloth . Here, the glass long fiber includes all known glass long fibers, and specifically, a strand formed by bundling glass filaments (single fibers), a glass yarn obtained by twisting the strand ( single yarn), the glass roving comprising aligning a plurality of draw twisted without applying Rio strands, twisted yarn, and the like formed by twisting the single yarns a plurality of.

[0015] The bulky yarn is obtained by blowing compressed air onto such glass long fiber to expand the glass long fiber and perform bulky processing (bulky processing). A bulky yarn (hereinafter, referred to as a bulky yarn) is manufactured by the following method shown in FIG. 1 as an example.

Reference numeral 10 in FIG. 1 denotes a glass long fiber such as a single yarn or a ply-twisted yarn as a raw material of a bulky yarn (hereinafter, a normal glass long fiber that is not bulky processed is referred to as a straight yarn).
Is a wound pan 10. In addition, as shown by a dotted line in FIG. 1, a plurality of the pans 10 may be arranged, that is, the bulky yarn may be formed from a plurality of straight yarns. Straight yarn A is made from pan 10 to winder 1
2, the yarn is passed through a predetermined route, and is pulled out by the feed roller 16 while being guided by the guides 14, and is conveyed to the high-speed air jet nozzle 18 by winding the winder 12. Here, the winding speed (yarn speed) of the winder 12 is controlled by the feed roller 1.
Normally, it is set to be lower than the pulling speed according to 6.

FIG. 2 is a schematic sectional view of the high-speed air jet nozzle 18. As shown in FIG. 2, the high-speed air jet nozzle 18 includes a threading member 22 having a through hole 20 through which the straight thread A passes, and a generally inserted threading member 22 having a predetermined gap. Cylindrical air supply member 2
4 and a jet nozzle 26, and the thread passing member 2
2 and the jet nozzle 26 are combined so as to close the open surface of the air supply member 24.

The straight yarn A is inserted from the inlet 20a of the through hole 20 formed in the threading member 22, and is inserted into the outlet 20b.
Is carried (yarn passing) so as to be discharged from the outlet 28 of the jet nozzle 26. On the other hand, the high-pressure air is introduced from the high-pressure air port 30 of the air supply member 24 and
The air is similarly discharged from the outlet 28 through a high-pressure air chamber 32 formed by a gap between the air supply member 2 and the air supply member 24. Here, a nozzle portion 34 is formed in the jet nozzle 26, and the high-pressure air is further pressurized and accelerated by the nozzle portion 34 and is sprayed on the straight yarn A. As a result, the single fibers in the straight yarn A are defibrated and expanded,
That bulky (bulk) is processed, a bulky yarn B _1.

The bulky yarn B ₁ subjected to bulky processing by the high-speed air jet nozzle 18 is glued by a gluing device 36,
The glue is dried by a dryer 38, fixed in shape, passed through a guide roller 40, traversed by a traverse 42, turned into a final bulky thread B _1, and wound around the winder 12.
In some cases, gluing and drying are not performed. Bulky yarn B ₁ obtained in this way, as an example, FIG. 3
The shape is as shown in FIG. FIG. 3A shows its appearance, and FIG. 3B shows its cross section.

FIG. 4 shows another example of a method of manufacturing a bulky yarn. The bulky yarn B ₂ shown in FIG. 4 has a core yarn,
A covering yarn is arranged around the surroundings. FIG.
In the example shown in FIG. 1, the same members as those in the example shown in FIG. 1 are denoted by the same reference numerals, and the description will mainly be given of different parts.

FIG. 4, reference numeral 44 is a straight yarn A ₁ as the core yarn (hereinafter referred to as core yarn A ₁₎ is a Pan wound up is, reference numeral 46 is a straight yarn A ₂ for coating (hereinafter, the coating the thread a ₂₎ is wound up pan. In addition,
As the core yarn, metal fibers, ceramic fibers, and the like can be used in addition to glass fibers. Generally core yarn A ₁ is often of a single, covering yarn A ₂ is as indicated by a dotted line in FIG. 4, is often more. Core yarn A ₁ and coated yarn A ₂
Are passed through a predetermined route from each pan to the winder 12. The core yarn A ₁ is pulled out by the core yarn feed roller 48 while being guided by the guide 14,
On the other hand, the covering yarn A ₂ is pulled out by the covering yarn feed roller 50 while being guided by the guide 14, and is united by the guide roller 52. Usually, the drawing speed of the core yarn feed roller 48 is faster than that of the covering yarn feed roller 50, and the winding speed by the winder 12 is slightly lower than the drawing speed of the core yarn feed roller 48.

The single yarn is subjected to bulky processing by the same high-speed air jet nozzle 18 as before, and the bulky yarn B ₂
Is a, Aya is morning in the traverse 42 via guide rollers 40, it is a final bulky yarn B _2, winder 1
It is wound up in 2. Bulky yarn B ₁ obtained in this way, as an example, a shape as shown in FIG. FIG. 5A shows its appearance, and FIG. 5B shows its cross section.

The thickness of the bulky yarn used in the sound-absorbing cloth of the present invention is not particularly limited, and may be appropriately selected according to the use of the sound-absorbing cloth and the air permeability described later.
Those having about 0 tex to 1150 tex are suitably used, and more preferably 75 tex to 300 tex. Note that tex
(Count) is the weight (g) per 1000 m, that is, g / 1000 m. Also, its forming material (single fiber material)
There is no particular limitation, and various materials such as E glass and C glass used for known glass cloth can be used.

Further, the thickness of the single fiber (filament) forming the bulky yarn used in the sound absorbing cloth of the present invention,
That is, the nominal diameter of the bulky yarn is not particularly limited. Here, according to the study of the present inventors, a thin single fiber forming a bulky yarn has a tendency to have better sound absorption characteristics, and a thin single fiber has a smaller thickness in a low frequency region. A good sound absorbing effect is exhibited, and as the single fiber becomes thicker, the peak of the sound absorbing characteristic shifts to the higher frequency side.

FIG. 6 shows, as an example, that both the thicknesses are 225 te.
x, using three types of bulky yarns having different nominal diameters of single fibers, weaving density of 27.5 yarns / 25 mm, weft density of 22.5
Sound absorption coefficient of 445 g / m ² of sound absorbing cloth obtained by plain weaving with 25 pieces / 25 mm in normal incidence method (JIS 1405-1962)
(The back air layer is 120 mm), but the smaller the single fiber nominal diameter, the higher the sound absorption characteristic peak is on the high frequency side, and the higher the sound absorption coefficient is. The bulky yarn used had a nominal diameter of a single fiber of 3 μm (actual maximum diameter 5.8 μm, minimum diameter 2.0 μm).
5 μm, average diameter 3.9 μm, standard deviation (σ) 0.6),
Nominal diameter of single fiber 6μm (maximum diameter 8.1μm, minimum diameter 4.
8 μm, average diameter 6.3 μm, standard deviation (σ) 0.5),
And single fiber nominal diameter 9 μm (maximum diameter 11.0 μm, minimum diameter 6.7 μm, average diameter 9.3 μm, standard deviation (σ)
0.8). Even with the same 225 tex bulky yarn, the number of single fibers constituting one bulky yarn is
The single fiber nominal diameter of 3 μm is 7200, the single fiber nominal diameter of 6 μm is 2400, and the single fiber nominal diameter of 9 μm is 1200. Therefore, even if weaving cloth of the same weaving method, weaving density, and mass (g / m ² ) using these, the microscopic density, the number and size of micropores described later, flexibility, etc. are different, As the nominal diameter of the single fiber increases, the bulky yarn itself becomes coarser and the flexibility decreases. As a result, it is considered that the above-described difference in the sound absorption characteristics occurs.

In consideration of the above, the nominal diameter of the single fiber of the bulky yarn may be appropriately determined according to the intended use and the frequency range of the main sound absorbing purpose. However, the nominal diameter of the single fiber is preferably 9 μm or less. preferable. Further, as the nominal diameter of the single fiber increases, the flexibility of the sound absorbing cloth obtained as described above decreases and the tactile sensation also decreases, so that the sound absorbing cloth of the present invention is directly touched by a user such as a curtain or a blind. When used for applications, the nominal diameter of bulky yarn is 6 μm.
It is preferable to set the following. Conversely, as the nominal diameter of the bulky yarn becomes thinner, the production efficiency decreases and the cost increases. Therefore, in applications where these are important, it is preferable to set the bulky yarn's single fiber nominal diameter to 3 μm or more. In addition,
As described in the above specific example, the nominal diameter of the single fiber of the bulky yarn and the actual diameter of the single fiber do not completely match, and if the nominal diameter of the single fiber is 3 μm, the actual diameter of the single fiber is 2 μm. .5
μm to 5.8 μm, 6.7 μm for single fiber nominal diameter 9 μm
〜11.0 μm. Accordingly, in the present invention, the nominal diameter of a single fiber of 3 μm or more includes the actual thickness of a single fiber of 2.5 μm or more, and the nominal diameter of a single fiber of 9 μm.
Means that the actual thickness of a single fiber is 11.0 μm or less.

In the present invention , such a bulky yarn is used.
Using both the straight yarn and then weaving, the sound absorption cross invention. Here, it is a matter of course that the larger the amount of the bulky yarn is, the better the sound absorbing property can be obtained, but the bulky yarn is used in an amount of 40% by weight or more, particularly, 60% by weight or more in terms of obtaining a better sound absorbing property. It is preferably used.
For併the bulky yarn and the straight yarn, used in a predetermined interval of the weft bulky yarn to the warp straight yarn (or vice versa), every other or 2 every other a bulky yarn and a straight thread, etc. Various modes can be used. Note that if the sound absorption cross used in applications curtains of the present invention, in terms of durability, preferably the weft and bulky yarn.

The weaving method of the sound-absorbing cloth of the present invention is not particularly limited, and any known weaving method such as plain weave, satin weave, satin weave, mosa weave, twill weave, leno weave and the like can be used. According to the study of the present inventors, sound-absorbing cloths using the same bulky yarn and having the same weaving density and mass have almost the same sound-absorbing characteristics, and there is no particular advantage. Therefore, the weave of the sound-absorbing cloth of the present invention may be appropriately selected according to the application. However, since the sound-absorbing cloth of the present invention exhibits good sound-absorbing characteristics when dense, the finer weave is easier to obtain good sound-absorbing characteristics, and in that respect, plain weave, satin weave, satin weave, etc. It is preferably used. Furthermore, the weaving density is not particularly limited, and may be appropriately determined according to the use of the sound absorbing cloth, the thickness of the bulky yarn, the mass described later, the air permeability, and the like.

FIG. 7 conceptually shows the appearance of the sound-absorbing cloth of the present invention woven in a plain weave. In FIG. 7, (a) is a conventional cloth using only a straight yarn, (b) is a sound absorbing cloth of the present invention using a bulky yarn as a weft, and (c) is a present invention using a bulky yarn for both a weft and a warp. , And have the same weave density, and the bulky yarn is formed by bulky processing the straight yarn (a). As is clear from FIGS. 7B and 7C, the sound-absorbing cloth of the present invention using the bulky yarn has the opening (opening) of the cloth closed by the defibrated single fiber.
The opening is smaller than the conventional cloth shown in FIG.
In particular, in (c) using only the bulky yarn, it is confirmed that there are many micropores when light is transmitted, but the opening is visually completely closed by a single fiber. In addition, defibrated single fibers are interposed in the micropores. The state of the openings (fine holes) and the degree of defibration of the bulky yarn affect the air permeability, which will be described later, and affect the sound absorption characteristics as will be described later in Examples.

According to the study by the present inventors, the sound-absorbing cloth of the present invention tend to express a good sound-absorbing characteristics as the mass is heavy, by the mass of 4 200 g / m ² or more, it was excellent A sound absorbing cloth having sound absorbing characteristics can be obtained. Although the heavier the mass, the better the sound absorption characteristics,
If the mass of the sound-absorbing cloth is too heavy, the flexibility, drapeability at the time of sewing, a decrease in tactile sensation, and the like are caused. Therefore, the mass is preferably set within a range in which there is no practical problem depending on the application. Adjustment of the mass of the sound-absorbing cloth of the present invention, considering the use of the sound-absorbing cloth, weaving density, thickness of bulky yarn and straight yarn,
It can be adjusted as appropriate by selecting the ratio between the straight yarn and the bulky yarn.

As described above, in the sound-absorbing cloth of the present invention, the state of the openings (micropores) and the degree of fibrillation of the bulky yarn affect the sound-absorbing characteristics, that is, the air permeability affects the sound-absorbing characteristics. . Therefore, in the sound absorbing cloth of the present invention,
Air permeability of 3 to 30 ([cm ³ / cm ² ] / sec; 124.5 Pa , JIS R
That be in the range of equivalent to 3420). The sound-absorbing cloth of the present invention basically exhibits better sound absorbing properties as the air permeability is lower. In particular, by setting the air permeability to 30 ([cm ³ / cm ² ] / sec; 124.5 Pa) or less, A sound absorbing cloth having excellent sound absorbing characteristics can be realized. However, there is a problem that lowering the improvement and productivity and production cost to too low air permeability, in consideration of this point, the air permeability 3
It shall be the range of ^{~ 30 ([cm 3 / cm} 2] /sec;124.5Pa). In addition,
The air permeability is more preferably 5 to 20 ([cm ³ / cm ² ] / sec; 12
4.5 Pa), and by setting this range, more favorable results can be obtained in terms of the balance between cost and sound absorption characteristics.

In the sound-absorbing cloth of the present invention, the air permeability is adjusted in consideration of the use of the sound-absorbing cloth, the weaving density, the degree of fibrillation of the bulky yarn, the nominal diameter of the bulky yarn, and the bulky yarn (straight yarn). The thickness can be adjusted as appropriate by selecting the thickness and the ratio between the straight yarn and the bulky yarn.

The sound-absorbing cloth of the present invention is obtained by impregnating a resin in the same manner as a normal glass cloth for the purpose of filling and coloring (dissolving or dispersing a dye or pigment in the resin), if necessary. It may be. There is no particular limitation on the resin used, and acrylic resins, urethane resins, silicon resins, vinyl chloride resins, vinyl acetate resins, fluorine resins, mixed resins using two or more of these resins, and these resins Various resins that can be impregnated in glass cloth, such as copolymer resins containing, especially, various resins that can be impregnated in glass cloth that requires flexibility. However, the resin impregnation may cause a decrease in flexibility and drapability, and may also cause the closure of the micropores or the adhesion of the defibrated single fiber, thereby deteriorating the characteristics of the sound absorbing cloth. It is not preferable to make the impregnation rate too high. Therefore, when impregnating the resin, the impregnation rate needs to be 10% or less, preferably 7% or less, and more preferably 5% or less. By setting the impregnation ratio in the above range, the reduction in sound absorption characteristics and flexibility can be sufficiently reduced, and the characteristics of the sound absorption cloth can be sufficiently exhibited. The resin impregnation into the sound-absorbing cloth may be performed in the same manner as in a normal glass cloth.For example, a resin dissolved in a solvent is applied to the sound-absorbing cloth of the present invention by a method such as dip coating or spray coating, and dried.
Heat treatment may be performed. Note that the sound-absorbing cloth of the present invention may be a cloth obtained by weaving a bulky type or straight type impregnated with resin in advance.

The sound-absorbing cloth of the present invention has the same flexibility and droop as cloth materials (cloths) made of synthetic fibers such as polyester and acrylic, and natural fibers such as cotton and hemp.
Furthermore, it has mechanical strength such as tensile strength and can be handled in the same manner as a conventional cloth made of synthetic fibers or natural fibers. In addition, it has excellent nonflammability unique to glass fibers.

The sound absorbing curtain of the present invention is obtained by sewing the sound absorbing cloth of the present invention having such excellent characteristics into a curtain. The sound-absorbing curtain of the present invention is not particularly limited in the sewing method and shape, and can be used for all so-called curtains using conventional cloth materials made of synthetic fibers, natural fibers, and the like. Specifically, the sound-absorbing cloth of the present invention may be sewn in the same manner as a conventional cloth material to form a normal drape curtain, and various curtains such as a dark curtain, a tent, and a decorative curtain used in a gym or a theater. Alternatively, a predetermined process may be performed after sewing, and a frame or rail may be attached to form an accordion curtain or a roll curtain. The sound-absorbing curtain of the present invention is not limited to being formed only from the sound-absorbing cloth of the present invention, and may be formed by stacking a normal cloth material made of synthetic fibers or natural fibers on one or both surfaces of the sound-absorbing cloth of the present invention. The curtain may be sewn to form the various curtains.

Further, as described above, the sound-absorbing cloth of the present invention can be handled in the same manner as conventional cloth materials made of synthetic fibers and natural fibers. Furthermore, by attaching frames and rails, in addition to such sound absorbing curtains, sound absorbing roll blinds, sound absorbing tapestries, sound absorbing ceiling membranes,
Various cloth products having excellent sound absorbing properties and non-combustibility, such as sound absorbing partitions and sound absorbing partitions, can be realized.

Although the sound absorbing cloth and the sound absorbing curtain of the present invention have been described above, the present invention is not limited to the above examples, and various improvements and modifications may be made without departing from the gist of the present invention. Of course.

[0038]

Hereinafter, the present invention will be described in more detail with reference to specific examples of the present invention.

[Example 1] Three single yarns of 67.5 tex (ECDE 75 1/0) long glass fiber were twisted for 2.5 to 4.0 S (S = number of twists / 25 mm). A 202.5 tex straight yarn (twisted yarn) was obtained. Further, the straight yarn was subjected to bulky processing with the apparatus shown in FIG. 1 to obtain a 225 tex bulky yarn. The drawing speed of the feed roller 16 was 150 m / min, and the winding speed of the winder 12 was 135 m / min. The single fiber nominal diameter is 6μ for both straight yarn and bulky yarn.
m (maximum diameter 8.1 μm, minimum diameter 4.8 μm, average diameter 6.
3 μm, standard deviation (σ) 0.5), and the total number of single fibers is 2
There are 400.

The above-mentioned straight yarn and bulky yarn were plain-woven to prepare the following various sample cloths shown in FIGS. 7 (a) to 7 (c). The air permeability was measured using a flanger tester (according to JIS R 3420). The mass was unified to 445 g / m ² by adjusting the weaving density.

<Sample cloth A (FIG. 7 (a))> Thread used: Warp straight yarn Woven density 30 yarns / 25mm Weft straight yarn Woven density 25 yarns / 25mm Bulk yarn used amount: 0% by weight Thickness: 0.35mm Air permeability: 96 to 123 ([cm ³ / cm ² ] / sec; 124.5 Pa)

<Sample cloth B (FIG. 7 (b))> Used yarn: Warp straight yarn Woven density: 30 yarns / 25mm Weft bulky yarn Woven density: 22.5 yarns / 25mm Bulk yarn used amount: 45% by weight Thickness: 0 47 mm air permeability; 39 to 55 ([cm ³ / cm ² ] / sec; 124.5 Pa)

<Sample cloth C (FIG. 7 (c))> Used yarn: Warp bulky yarn Weaving density 27.5 yarns / 25mm Weft bulky yarn Weaving density 22.5 yarns / 25mm Used bulky yarn amount: 100% by weight Thickness 0.65 mm air permeability; 28.3 to 31.3 ([cm ³ / cm ² ] / sec; 124.5 Pa) Table 1 below summarizes the data of the sample cloths A to C.

[0044]

[Table 1]

For each of the above sample cloths, JIS A1409-19
The reverberation sound absorption coefficient was measured according to 67. The results are shown in Figure 8, as described above, the sound absorbing cloth using bulky yarn, since the opening of the cross is blocked by single fibers Caio with bulky processed, shown in FIG. 7 (a) The sample cloth B shown in FIG. 7B, which has a smaller opening and lower air permeability than the sample cloth A which is a conventional cloth,
It shows better sound absorption characteristics than the above. Further, in the sample cloth C shown in FIG. 7C made of only bulky yarn, as described above, it is confirmed that a large number of micropores are formed when light is transmitted, but the openings are visually closed by single fibers. It has a low air permeability and very good sound absorption characteristics.

Example 2 Two single yarns of 33.7 tex (ECDE 150 1/0) glass long fiber were plied to obtain a 67.5 tex straight yarn (twisted yarn). Further, the example twisted yarn of 135tex (ECDE 75 1/2)
A bulky yarn of 150 tex was obtained by bulky processing in the same manner as in Example 1 . The single fiber nominal diameter is 6 μm for both straight yarn and bulky yarn (the maximum diameter is 8.1 μm, and the minimum diameter is 4.8.
μm, average diameter 6.3 μm, standard deviation (σ) 0.5).

The weft density of the 67.5 tex straight yarn is fixed to 60 yarns / 25 mm, and the 150 tex straight yarn is used.
The following cloths D to H were obtained by weaving while changing the weaving density in various ways using the bulky yarn of the above as a weft yarn. The air permeability is
It was measured using a Frangi ー ル l tester (according to JIS R 3420).

<Sample cloth D> Used yarn; Warp straight yarn Weaving density 60 yarns / 25mm Weft bulky yarn Weaving density 12 yarns / 25mm Weight: 235 g / m ² Bulk yarn used amount: 30.7% by weight Thickness: 0. 29 mm air permeability; 105.6 to 118.8 ([cm ³ / cm ² ] / sec; 124.5 Pa) Woven structure; plain weave

<Sample cloth E> Used yarn; Warp straight yarn Woven density: 60 yarns / 25 mm Weft bulky yarn Woven density: 25 yarns / 25 mm Weight: 310 g / m ² Bulk yarn used amount: 48.0% by weight Thickness; 31 mm air permeability; 37.3 to 49.0 ([cm ³ / cm ² ] / sec; 124.5 Pa) Woven structure; plain weave

<Sample cloth F> Used yarn: Warp straight yarn Weaving density: 60 yarns / 25 mm Weft bulky yarn Weaving density: 35 yarns / 25 mm Weight: 375 g / m ² Bulk yarn used amount: 56.5% by weight Thickness: 0.0 35mm air ^{permeability; 20.5~32.5 ([cm 3 / cm} 2] /sec;124.5Pa) weave; twill

<Sample cloth G> Used yarn: Warp straight yarn Woven density: 60 yarns / 25 mm Weft bulky yarn Woven density: 50 yarns / 25 mm Weight: 460 g / m ² Bulk yarn used amount: 65.0% by weight Thickness: 0.0 46 mm air permeability; 14.8 to 22.5 ([cm ³ / cm ² ] / sec; 124.5 Pa) Woven structure;

<Sample cloth H> Used yarn: Warp straight yarn Weaving density 60 yarns / 25 mm Weft bulky yarn Weaving density 60 yarns / 25 mm Mass: 525 g / m ² Bulk yarn used amount: 68.5% by weight Thickness: 0. 49 mm air permeability; 5.5 to 9.5 ([cm ³ / cm ² ] / sec; 124.5 Pa) weave structure; satin weave The specifications of the above sound absorbing cloths D to H are summarized in Table 2 below.

[0053]

[Table 2]

For each of the above sample cloths, JIS A1409-19
The reverberation sound absorption coefficient was measured according to 67. FIG. 9 shows the results. As shown in FIG. 9, as the weaving density of the weft using the bulky yarn increases, the air permeability decreases and the sound absorption characteristics also improve. In addition, when the surface of each sample cloth was observed, the openings other than the sample cloth D were blocked by bulky yarn (unwoven single fibers) so that pores could not be confirmed unless light was transmitted. From the above, the sound absorbing characteristics of the sound absorbing cross of the invention (Sample Cross G and H) can be confirmed to be greatly affected by the condition and air permeability of the micropores.

Considering that the fine holes are openings closed by unwound monofilaments, the number of the fine holes per unit area increases according to the number of warps × the number of wefts in plain weave. . Here, in the plain weave, the warp and the weft are each entangled one by one to form an opening. However, in other weave structures, that is, in a twill weave, a satin weave, a satin weave, etc., one warp and one weft are provided. Do not confound. However, even in these weaving structures, the yarn and the weft intersect one by one, so that there is an opening similar to a plain weave. Therefore, if the weaving density and the like are the same, the number of micropores is It is considered to be almost the same in the woven type.

[0056]

As described above in detail, according to the present invention, a cloth (cloth material) made of conventional synthetic fibers such as polyester and acrylic, and natural fibers such as cotton and hemp is used. In addition, a sound-absorbing cloth having excellent sound-absorbing characteristics and non-combustibility can be realized, and excellent sound-absorbing curtains, sound-absorbing roll blinds, and sound-absorbing tapestry can be realized.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a method for producing a bulky yarn.

FIG. 2 is a schematic cross-sectional view of a high-speed air jet nozzle used in the method of manufacturing the bulky yarn shown in FIG.

FIG. 3 is a conceptual diagram of a bulky yarn obtained by the method for manufacturing a bulky yarn shown in FIG. 1, wherein FIG.
(B) shows the cross section, respectively.

FIG. 4 is a conceptual diagram showing another example of a method for producing a bulky yarn.

5 is a conceptual diagram of a bulky yarn obtained by the bulky yarn manufacturing method shown in FIG.
(B) shows the cross section, respectively.

FIG. 6 is a graph showing the sound absorption coefficient in the normal incidence direction of the sound absorbing cloth of the present invention.

FIGS. 7A and 7C show a conventional glass cloth,
(B) is a schematic plan view of an example, shown, respectively Re its sound absorption cross invention.

FIG. 8 is a graph showing a reverberation chamber method sound absorption coefficient in Example 1 .

FIG. 9 is a graph showing a reverberation chamber method sound absorption coefficient in Example 2 .

[Explanation of symbols]

 10, 44, 46 Pan 12 Winder 14 Guide 16 Feed roller 18 High-speed air jet nozzle 20 Through hole 22 Threading member 24 Air supply member 26 Jet nozzle 28 Outlet 30 High pressure air port 32 High pressure air quality 34 Nozzle part 36 Gluing device 38 Dryers 40, 52 Guide rollers 42 Traverse 48 Core yarn feed roller 50 Coated yarn feed roller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-96275 (JP, A) JP-A-6-192937 (JP, A) JP-A-62-28435 (JP, A) JP-A 52-96235 148271 (JP, A) Japanese Utility Model Showa 59-61283 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) D03D 15/12 G10K 11/162

Claims (5)

(57) [Claims] The present invention relates to a bulky processed yarn obtained by performing a bulky processing in which the glass continuous fiber is expanded by blowing compressed air on the glass continuous fiber, and a glass continuous fiber which is not bulked.
Sound absorption cross der, characterized in that formed by weaving with
Therefore, the mass is 400 g or more per 1 m ² and the air permeability is
Is 3 to 30 ([cm ³ / cm ² ] / sec; 124.5 Pa).
Sound cross . (2) The bulky yarn is used for the weft yarn,
It is made by weaving unprocessed glass long fibers into the warp.
The sound-absorbing cloth according to claim 1, wherein: 3. The bulky yarn has a nominal diameter of a single fiber of 3 μm or more.
The sound-absorbing cloth according to claim 1 or 2 , which has a thickness of 9 µm. 4. A sound-absorbing cloth according to any one of claims 1 to 3 using the ratio of the bulked yarn is 40% by weight or more. 5. A sound-absorbing curtain formed by sewing absorbing cloth according to any one of claims 1-4.