JPH1077561A - Formed fabric product and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a formed fiber product that is usable by separating along the thickness, length or width depending on the purpose of use and has a deodorant effect. SOLUTION: This formed fabric product comprises deodorant fibers A, and composite fibers B which are composed of a thermoplastic polymer R2 and a thermoplastic polymer R1 having a lower melting point than that of both the deodorant fibers A and thermoplastic polymer R2, in such a configuration that a layer (a) which has contact points of fibers at least in a part of which the composite fibers B adhere mutually or to deodorant fibers A, and a layer (b) which does not contain the composite fibers B or in which the weight ratio of the composite fibers B is smaller than the weight ratio of the composite fibers B in the layer (a) are mutually present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a fiber molding. More specifically, the present invention relates to a deodorized fiber molded article which can be easily separated into a thickness, a length, and a width required for a desired use and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, cushioning materials such as middle materials of bed mats for bedclothes and medical care, middle materials of vehicle seats used in trains and automobiles, middle materials of sofas for furniture, pad materials for clothing, In general, resin foams such as polyurethane have been mainly used as door trims, sun visors, filters for various applications, sound insulation for houses, heat insulation, and the like. Alternatively, it is necessary to use an alternative gas, and there is a problem that the air permeability and the moisture permeability are low and the water is easily stuffed, and the water permeability and the drying property are low. Therefore, as a cushioning material for solving the problems of these resin foams, a fiber molded body in which fibers are heated and compressed to join the contact points with each other, for example, is disclosed in
Japanese Patent Publication No. 2-2155, Japanese Patent Publication No. 1-183183, Japanese Patent Publication No. 4-334478, Japanese Patent Laid-Open Publication No. 3-140185, and the like have been proposed.

[0003] Cushion materials made of these fiber moldings use low-melting-point fibers as heat-adhesive fibers,
By using a composite fiber having a high melting point thermoplastic resin as a core component and a low melting point thermoplastic resin as a sheath component,
It is intended for adhesion between fibers, and some results have been obtained. However, it has been necessary to form a large block like a conventional resin foam, and then cut and bond it to produce a product.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to have excellent deodorizing properties, hardly compressible, soft, moisture-permeable, water-permeable and comfortable in use. It is an object of the present invention to provide a fiber molded article which can be easily separated into a thickness, a length or a width required for the use of the present invention, and a method for efficiently producing the fiber molded article.

[0005]

Means for Solving the Problems The fiber molded article of the present invention has the following constitution to solve the above-mentioned problems.

[0006] That is, a fiber molded article containing deodorant fibers A and composite fibers B, wherein the composite fibers B are composed of a thermoplastic polymer R1 and a thermoplastic polymer R2, and the melting point of the thermoplastic polymer R1 is reduced. At least a part of the contact points between the composite fibers B and between the composite fibers B and the deodorant fibers A is substantially lower than both the melting point of the odor fiber A and the melting point of the thermoplastic polymer R2. Layer a and composite fiber B
Or a layer b in which the weight ratio of the composite fiber B is smaller than the weight ratio of the composite fiber B in the layer a.

[0007] The method for producing a fiber molded article of the present invention has the following configuration.

That is, when two or more types of fibers are mixed, one type has a melting point of deodorant fiber A and a thermoplastic polymer R
The composite fiber B having a thermoplastic polymer R1 lower than 2 is mixed and spread, and the layer a formed by filling the gas-permeable mold with the gas and the content ratio of the composite fiber B is smaller than that of the layer a. Layer b which is formed by filling the lower part alternately,
A method for producing a fiber molded body, comprising performing a thermal bonding treatment in a compressed state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail using embodiments with reference to the drawings.

The fiber molded article of the present invention contains the deodorant fiber A and the composite fiber B. For example, as shown in FIG. 1, the layer a (a1 to a6) containing a large amount of the composite fiber B does not contain the composite fiber B, or the content of the composite fiber B is lower than the content of the composite fiber B in the layer a. The layers b (b1 to b5) are alternately present and stacked.

The layer a is used for the purpose of the present invention, and is melt-bonded by the thermoplastic polymer R1 of the composite fiber B between the composite fibers B and at the contact point between the composite fiber B and the deodorant fiber A, and is stable. Can be heat-set in various shapes. On the other hand, the layer b is located between the layers a stacked in multiple layers, and the layers a1, a2, a3,.
a4, a5, and a6 are layers that can be separated when using them, and have no or little fusion bonding of the conjugate fiber B by the thermoplastic polymer R1 compared to the layer a. Therefore, the thickness of the layer b may be a thickness necessary for separating the layers a.

[0012] This multi-layer structured fiber molded body, when used, without cutting using a cutting machine or the like,
The layer b can be easily peeled off and used.

Next, the deodorant fiber A used for the fiber molded article of the present invention will be described. As deodorant fiber A, Japanese Patent Application Laid-Open
A fiber in which a deodorant component is kneaded into a polymer may be used as described in JP-A-124809, or a post-processed deodorant component may be used as described in JP-A-62-6978. May be obtained by the method of giving in. The deodorant fiber A can also be obtained, for example, by grafting a free acidic group by graft polymerization as a method of providing a deodorant component by post-processing. The acidic group in this method means a carboxyl group or a sulfonic acid group, and the content of the acidic group is 3.2 × 1 in order to impart durable deodorizing performance.
^0-4 gram equivalents / gram fiber or more is preferred,
It is more preferably at least 9.3 × 10 ⁻⁴ gram equivalent / gram fiber. Incidentally, the end of the introduced acidic group by graft polymerization -COOH or is most preferred state of -SO ₃ H, partially alkali metals or alkaline earth metals, more generally of metal or a quaternary ammonium, It may be substituted by an ionic organic substance such as a salt. It is preferable to distribute a large amount of acidic groups to the surface of the fiber by such graft polymerization, because malodor such as ammonia, hydrogen sulfide, and mercaptans, which are said to be the source of malodor, can be efficiently absorbed.

The cross-sectional shape of the deodorant fiber A may be a round cross-section, an irregular cross-section such as polygonal, multi-lobed, elliptical, or a hollow cross-section thereof. The hollow section is a more preferable example in order to improve the bulkiness of the fiber molded body. The deodorant fiber A has a fineness of 0.5 to 30 denier and a fiber length of 10 to 10
Short fibers of 0 mm are preferably used. If it is smaller than 0.5 denier, the bulk of the fiber may be low, the resistance to compression may be low in spite of the density of the fiber molded body, and the compression recovery may also be low. On the other hand, when the thickness is larger than 30 denier, the touch may become coarse and hard. Further, if the fiber length is shorter than 10 mm, the entanglement between the fibers becomes poor, and it may be difficult to maintain the shape when the fiber molded body is thinned. If the fiber length is longer than 100 mm, the fiber opening and mixing properties are poor. And it may be difficult to obtain a fiber molded body having a uniform density.
Further, the crimp of the deodorant fiber A may be appropriately determined according to the use of the fiber molded article. In order to improve the bulkiness, softness, and recovery from compression, the number of crimps is 3 to 10 peaks / 25.
mm and the degree of crimp are preferably 5 to 30%. The deodorant fiber A may be mixed with various pigments such as titanium oxide and carbon black as necessary, as well as various antioxidants, coloring inhibitors, light stabilizers, antistatic agents, etc. as long as the original functions are not lost. Is also preferred.

Next, the conjugate fiber B used in the fiber molded article of the present invention will be described.

The conjugate fiber B comprises a thermoplastic polymer R2 and a thermoplastic polymer R1. Examples of the thermoplastic polymer R1 include polyethylene, polypropylene, ethylene propylene copolymer, and ethylene butene copolymer in the case of polyester. Coalesced, selected from thermoplastic polymers such as polyolefins or olefin copolymers such as ethylene vinyl acetate copolymer, polyhexamethylene terephthalate, polyhexamethylene butylene terephthalate, polyesters such as polyhexamethylene terephthalate isophthalate, or copolyesters, At least one polymer can be used.

The thermoplastic polymer R2 is not particularly limited. For example, terephthalic acid, 2,6-naphthalenedicarboxylic acid or an ester thereof is used as a main dicarboxylic acid component, and ethylene glycol or tetramethylene glycol is used as a main glycol component. Polyester such as polyethylene terephthalate, polybutylene terephthalate or polyethylene 2,6-naphthalate can be used. Of these, polyethylene terephthalate (ordinary polyester) is preferred.

When the composite fiber B is of a nylon type,
For example, a thermoplastic polymer R2 of nylon 6 and a thermoplastic polymer R1 of nylon 6 copolymerized with nylon 66 to lower the melting point can be used.

The melting point of the thermoplastic polymer R1 is determined by heat-treating and heat-sealing in the production of a fiber molded body.
In order to obtain sufficient thermal adhesion between the fibers and to avoid performing unnecessary high-temperature heat treatment, the temperature is preferably at least 20 ° C. lower than that of other fibers or the thermoplastic polymer R2.
It is preferably in the range of 0 to 170C.

The thermoplastic polymer R1 / in the composite fiber B
The weight ratio R1 / R2 of the thermoplastic polymer R2 is from 20/80.
Preferably, the ratio is 60/40, and in particular, 20/80 to 5
The range of 0/50 is more preferable, and the weight ratio of R1 is 20%.
If it is less than the above, sufficient thermal adhesion between the fibers cannot be obtained, and the shape fixability of the produced fiber-formed body tends to be poor. On the other hand, when the weight ratio of R1 exceeds 60%, the softness of the fiber molded body is impaired, and there is a tendency that a problem that the compression set becomes large is caused.

The composite fiber B has a thermoplastic polymer R2 as a core component and a thermoplastic polymer R1 as a sheath component from the viewpoints of morphological stability against kneading action and the like when using a fiber molded article and low dust generation. A core-sheath type conjugate fiber is particularly preferable.

The composite fiber B used for the layer a of the fiber molded article of the present invention is preferably 15 to 60% by weight in weight ratio. When the amount of the conjugate fiber B is less than 15% by weight, the heat bonding points of the conjugate fiber B are reduced, and the shape stability tends to be deteriorated. On the other hand, if the amount of the composite fiber C exceeds 60% by weight, the softness of the fiber molded body tends to decrease, and the touch feeling tends to become coarse and hard.

In the composite fiber B, if necessary, R
In addition to pigments such as titanium oxide and carbon black other than 1, R2, various antioxidants, coloring inhibitors, light stabilizers, antistatic agents and the like may be added. Such a conjugate fiber B can be produced by an ordinary conjugate spinning method. Further, in order to impart bulkiness and softness to the fiber molded article of the present invention and to improve recovery from compression, the composite fiber B preferably has mechanical crimping or the like. The number of crimps may be appropriately determined depending on the use of the fiber molded body. The number of crimps is at least 3 to 10 ridges / 25 mm, and the degree of crimp is 5 to 30%.
Is preferred. In order to impart more bulkiness, it is more preferable that the crimp is a latent crimp developed by asymmetric cooling or the like during spinning. Further, as the composite fiber B,
Short fibers having a fineness of 0.5 to 30 denier and a fiber length of 10 to 100 mm are preferably used from the viewpoints of bulkiness and softness.

The fiber molded article of the present invention may optionally contain other fibers in addition to the deodorant fiber A and the composite fiber B. As other fibers, natural fibers such as cotton and wool, synthetic fibers such as polyester, polyamide and polyacrylonitrile, regenerated fibers such as rayon and acetate, and semi-synthetic fibers can be used. Among them, polyester-based fibers and polyamide-based fibers are preferably used as a material excellent in recovery from compression of the fiber molded article and in form stability. In addition, the cross-sectional shape of the other fibers may be a round cross-section, or may be an irregular cross-section such as a polygon, a multi-leaf, or an ellipse, or a hollow cross-section thereof.

The other fibers used in the fiber molded article of the present invention preferably have crimps for imparting bulkiness and softness and improving recovery from compression. The number of crimps may be appropriately determined depending on the use of the fiber molded body, but the number of crimps is preferably 3 to 10 ridges / 25 mm, and the degree of crimp is 5 to 5.
30% is preferred. In order to impart more bulkiness, it is preferable that the crimp is a latent crimp developed by asymmetric cooling or the like during spinning. Further, as other fibers, from the viewpoint of imparting shape fixability and softness of the fiber molded body, the fineness is preferably 0.5 to 30 denier,
Short fibers having a fiber length of 10 to 100 mm are preferably used. Other fibers include pigments such as titanium oxide and carbon black as required, as well as various antioxidants,
Needless to say, a coloring prevention agent, a lightfast agent, an antistatic agent and the like may be added.

Next, a method for producing the fiber molded article of the present invention will be described. FIG. 2 is a schematic schematic longitudinal sectional view of a mold of an apparatus used in an example of the method for producing a fiber molded article of the present invention.

The above-mentioned deodorant fiber A, composite fiber B and, if necessary, other fibers are mixed to a desired mixing ratio by a cotton feeder, a cotton mixer and a fiber opening machine used in a usual spinning process.
The fiber is opened, and the air-permeable mold having a shape suitable for the purpose is filled by blowing with a gas such as an air flow by a cotton fan.

The mold used in the present invention has air permeability. When the mold does not have air permeability, there is a problem that the fiber cannot be efficiently filled. The range of air permeability is, for example, JIS L
1079-1966 As measured by a Frazier-type air permeability tester, air permeability is 5 to 200 cc / cm.
A range of ² · sec is preferable.

As such a mold, for example, an upper mold 2 and a lower mold 1 using a punched metal plate shown in FIG.
Can be used.

In the method of blowing into the air-permeable lower mold 1, first, at least the deodorizing fiber A and the composite fiber B or other fibers are mixed and opened, and the layer a is filled by blowing from the blowing port 3. Next, the composite fiber B is not mixed with the combination of the above-mentioned cotton blends, or the mixing ratio of the composite fiber B is adjusted to the layer a.
And the layer b is blown and filled from the blowing port 3. After repeating the blowing and filling of the layers a and b,
The filling fiber is compressed by the air permeable upper mold 2, and the air permeable upper mold 2 is compression-fixed at a target density. The compression is preferably performed each time the fibers of the layer a and the layer b are blown, since the density of each layer can be made uniform.

Further, the compressed and fixed fibers are heat-treated together with the air-permeable mold to bond a part of the contact points between the composite fibers B and between the composite fibers B and the deodorant fibers A and other fibers. To fix the form. The temperature of the heat treatment may be a temperature at which the thermoplastic polymer R1 of the conjugate fiber B is melt-bonded, and is generally equal to or higher than the melting point of the thermoplastic polymer R1 and 200 ° C.
The following is preferred.

The packing density may be appropriately determined according to the use of the fiber molded product, but is generally 0.01 to 0.1 g / g.
cm ³ is preferred. If the density is less than 0.01 g / cm ³ , the fiber molded article is too soft and the form stability is poor,
If it exceeds 0.1 g / cm ³ , the softness of the fiber molded article tends to decrease.

[0033]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. The measuring methods of various characteristics described in the present invention are as follows.

(1) Deodorizing A method: A layer of a fiber molded product was spread into a glass column by an ammonia gas detection tube method, and 3 g was filled thereinto, and 1000 ppm was added.
A gas having an ammonia gas concentration of 3.3 cm / sec is passed at a ventilation speed of 3.3 cm / sec, and the breakthrough time and the amount of breakthrough adsorption are measured. Is also preferably 12 mg / g or more).

Method B: about 5% ammonia water 3 × 6 cm
After impregnating 0.25 ml of the filter paper into a 150 ml glass container, simultaneously put 0.5 g of the fiber obtained by opening the layer a of the fibrous molded product, plug it tightly, and sensory evaluate the change in odor after standing for 4 hours. I do. (Evaluated in four grades: odorless, slightly odorous, odorous, and strong odor.) However, laundry was washed at 40 ° C. for 5 minutes under the conditions of household detergent 2 g / l, greed ratio 1:50, washed with water, and dried. It is.

(2) Fineness The fineness was measured according to the method of JIS L 1015-7-51A.

(3) Average fiber length (cut length) Measured according to JIS L 1015A method (staple diagram method).

(4) Number of Crimps and Degree of Crimp The number of crimps and the degree of crimp are determined according to JIS L 1015-7-12.
-1 and JIS L1015-7-12-2.

(5) Density Fiber molded body (vertical: 20 cm, horizontal: 20 cm, thickness:
(20 cm) was left in an atmosphere of 20 ° C. × 65% RH for 24 hours, and the weight (w) was measured and determined by the following equation.

Density (g / cm ³ ) = w / 8000 (5) Separation property by peeling off layer b Layers a1 and a2 are grasped with a finger, and the separation property by peeling off layer b is judged by tactile sensation. Were evaluated in four stages from very easily separating without deformation (A) to difficult to separate (X).

EXAMPLES 1-3 AND COMPARATIVE EXAMPLE 1 A normal nylon 6 chip (melting point: 215 ° C.) was melt-spun and drawn to obtain a circular hollow having a fineness of about 8 denier and a cut length of 51 mm (hollow ratio: 18%). ) Nylon 6 staple. Further, this staple was prepared by adding 19% owf of acrylic acid, 30% owf of methacrylic acid, 1% owf of ammonium persulfate,
Superlight C (manufactured by Mitsubishi Gas Chemical Company) was heated to 80 ° C. at a rate of 1 ° C./min from room temperature under the conditions of 3% owf and a bath ratio of 1:14, followed by graft polymerization at 80 ° C. for 60 minutes. Nylon 6-based deodorant fiber A was produced. This deodorant fiber A10
The graft ratio of 0% methacrylic acid was determined from the weight increase rate, and the amount of carboxyl groups was determined.
It was 0 ^-2 gram equivalents / gram fiber. The cross section of the fiber was cut, dyed with a cationic dye, and examined for the distribution of carboxyl groups. As a result, it was confirmed that a large amount of carboxyl groups were present on the fiber surface. This deodorant fiber A1
The deodorizing property of 00% is 34.6 before the washing of the breakthrough adsorption amount of the method A.
mg / g, 31.2 mg / g after washing, Method B showed no odor both before and after washing, and showed extremely high deodorizing properties. The breakthrough time before washing in Method A was 46 minutes.

Separately, a fineness is obtained by combining a normal nylon 6 chip (melting point: 215 ° C.) with a core of 50% by weight and a nylon 6 copolymer of nylon 66 with a melting point of 105 ° C. with a sheath of 50% by weight. 4 denier, cut length 51mm
The composite fiber B having a circular cross section was produced.

The deodorant fiber A and the composite fiber B are mixed, and further mixed and opened with a roller card. The inner surface of each of the surfaces, which has been punched from the mold blowing port 3 as shown in FIG. An air flow is blown into the lower mold 1 of × 1000 × 1000 mm, and compressed by the upper mold 2 having a punched surface on each side each time the layers a and b are filled, and the layers a and b are multilayered. After blowing and filling, the filling fiber was fixed in the upper mold 2 at a packing density of 0.038 g / cm ³ and a thickness of 500 mm. Using a heat setter in which the filled and compressed fiber mixture is used for setting the spun yarn together with the mold, the heat
It heat-set at 30 degreeC x 30 minutes, and manufactured the fiber molded object by which the layer a and the layer b were laminated | stacked in multiple layers.

Table 1 shows the properties of the fiber molding obtained by changing the mixing ratio of the deodorant fiber A and the composite fiber B in the layer b. In Examples 1, 2 and 3, the mixing ratio of the conjugate fiber B in the layer b was 0 to 0.
30% by weight, the mixing ratio of the conjugate fiber B is lower than that of the layer a, the fiber molded body of the layer a is not deformed, the separation by the peeling in the layer b is good, and the deodorizing methods A and B are used. Both methods were good. On the other hand, in Comparative Example 1, although the deodorizing property was good in both the method A and the method B, the mixing ratio of the composite fibers B contained in the layers a and b was the same, and the separation property by peeling in the layer b was poor. Was something.

[0045]

[Table 1] Example 4 Non-stretched non-stretched polyethylene terephthalate having a melting point of 255 ° C. in pellet form, having a hollow cross-sectional structure having a spinning temperature of 280 ° C., a take-up speed of 1350 m / min, and a hollow ratio of 31%, and asymmetrically cooled at the exit of a spinneret. The undrawn yarn is drawn at a draw ratio of 3.0 times and at a drawing bath temperature of 80.
C., and after mechanical crimping with a crimper, cut to a cut length of 38 mm and heat-treated at 175 ° C. to a fineness of about 6
Denier, 4.6 crimps / 25 mm, degree of crimp 26.4
% Of ordinary polyester hollow fibers (other fibers).

Separately, as the thermoplastic polymer R2, a normal polyethylene terephthalate having a melting point of 255 ° C. is used, and as the thermoplastic polymer R1, a polyethylene terephthalate-based polyester having a melting point of 110 ° C. copolymerized with 40 mol% of isophthalic acid is used. Spinning temperature 285 ° C, take-off speed 1
350 m / min, weight ratio represented by R1 / R2 is 50/5
A thermoplastic polymer R2 as a core, and a thermoplastic polymer R2
An undrawn yarn of the concentric conjugate fiber B having a sheath portion of 1 is spun, and the undrawn yarn is drawn 3.0 times at a drawing bath temperature of 80.
The film was stretched at 0 ° C. and mechanically crimped with a crimper. further,
After drying with a heat setter at 70 ° C, a finishing oil is applied, cut into a cut length of 64 mm, and fineness is about 4 denier.
A composite fiber B having a surface layer with a melting point of about 110 ° C. was obtained.

The deodorizing fiber A, the polyester-based composite fiber B and the other fibers produced in Example 1 were blended, and further blended and opened with a roller card. From 3, the layer a is 40% by weight of the deodorant fiber A, 30% by weight of the polyester-based composite fiber B and 30% by weight of the other fibers in the lower mold 1 having an inner surface having a surface of 1000 × 1000 × 1000 mm on which each surface is punched. To 30% by weight,
The layer b is blown together with the air flow as only other fibers, and is compressed by the upper mold 2 having a punched surface on each side every time the layer a and the layer b are filled. After filling, the filling fiber is filled with the upper mold 2 at a packing density of 0.0
It was fixed at ³ g / cm ³ and 500 mm in thickness. The filled and compressed fiber mixture was heat-set at 130 ° C. for 25 minutes using a heat setter used for setting a spun yarn together with a mold to produce a fiber molded body in which layers a and b were laminated in multiple layers.

[0048] The obtained fiber molded body is composed of the composite fiber B of the layer b.
Is 0% by weight, the mixing ratio of the conjugate fiber B is lower than that of the layer a, the separation by peeling in the layer b is good, and the deodorizing property is obtained without deforming the fiber molded body of the layer a. Both method A and method B were good.

[0049]

According to the present invention, it is possible to obtain a deodorant fiber molded article which can be easily separated into a thickness, a length or a width required for a desired use and can be used.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view schematically showing an example of a fiber molded article of the present invention.

FIG. 2 is a schematic longitudinal sectional view schematically showing an example of an apparatus used for producing a fiber molded body of the present invention.

[Explanation of symbols]

 1: Lower mold 2: Upper mold 3: Gas inlet

Claims (10)

[Claims] 1. A fiber molded product comprising a deodorant fiber A and a conjugate fiber B, wherein the conjugate fiber B is composed of a thermoplastic polymer R1 and a thermoplastic polymer R2, and the melting point of the thermoplastic polymer R1 is reduced. At least a part of the contact points between the composite fibers B and between the composite fibers B and the deodorant fibers A is substantially lower than both the melting point of the odor fiber A and the melting point of the thermoplastic polymer R2. Characterized by the fact that layers a and b each containing no composite fibers B or having a weight ratio of the composite fibers B smaller than the weight ratio of the composite fibers B of the layer a are alternately present. . 2. The weight ratio of said composite fiber B in layer a is 1
The fiber molded product according to claim 1, wherein the content is 5 to 60%. 3. The fiber molded product according to claim 1, wherein the weight ratio of the deodorant fiber A is 40% or more. 4. The composite fiber according to claim 1, wherein the composite fiber B is a core-sheath composite fiber, wherein the thermoplastic polymer R2 is a core component and the thermoplastic polymer R1 is a sheath component. The fiber molded article according to the above. 5. The fiber molding according to claim 1, wherein the deodorizing fiber A contains at least 3.2 × 10 ^-4 gram equivalent / gram fiber of free carboxyl groups. body. 6. The fiber molded product according to claim 1, wherein the constituent fibers have a fineness of 0.5 to 30 denier and a fiber length of 10 to 100 mm. 7. The method according to claim 1, wherein each of the constituent fibers is a short fiber having a three-dimensional crimp, and has a number of crimps of at least 3 ridges / 25 mm and a degree of crimp of at least 5%. 7. The fiber molded article according to any one of 1 to 6. 8. The composite fiber B having a sheath component / core component weight ratio of 2
2. The ratio is 0/80 to 60/40.
8. The fiber molded product according to any one of items 1 to 7. 9. When mixing two or more types of fibers, one type mixes and opens a composite fiber B having a melting point of a deodorant fiber A and a thermoplastic polymer R1 lower than the thermoplastic polymer R2. Layer a formed by filling in a gas-permeable mold with gas
And a layer b formed by filling the composite fiber B at a lower content ratio than the layer a. The layer b is alternately formed, and a heat bonding process is performed in a compressed state. 10. The method for producing a fiber molded article according to claim 9, wherein a compression treatment is performed each time the fibers used in the layers a and b are filled.