JPH08170258A - Yarn mixture, molded article of yarn and production of molded article of yarn - Google Patents

Abstract

PURPOSE: To obtain a molded article of yarn hardly being heated due to high air permeability and water vapor permeability, having excellent water vapor absorption, showing a stable shape because of low compression residual strain, hardly yielding despite of lightness and softness and having a refreshing feeling in use. CONSTITUTION: In a yarn mixture comprising 40-80wt.% of hollow three-layer conjugated yarn which is combined by laying an intermediate layer composed of a polyether ester amide R1 between an outer layer and an inner layer constituted of a polyester R2 and 20-60wt.% of conjugated yarn prepared by combining a polyester R3 as a core part with a polyester R4 with a sheath part, the characteristic of this yarn mixture is that the melting point of the polyester R4 is lower than the lower melting point of the polyester R2 or the polyester R3 and the weight ratio of the polyester R3/R4 is in a range of 40/60-80/20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber mixture, a fiber molding using the same, and a method for producing the fiber molding.

More specifically, for vehicle seats, pad materials, door trims, sun visors, bedding bed materials, mattresses, kotatsu, sofas for furniture, cushions, other filters, for houses used in trains and automobiles. The present invention relates to a fiber mixture suitably used as a shielding material such as sound insulation and heat insulation, a cushioning material and a shielding material such as a material for a pad for clothing, a fiber molded body using the same, and a method for producing a fiber molded body.

[0003]

2. Description of the Related Art Conventionally, as a cushion material, a resin foam such as polyurethane, Japanese Patent Publication No. 62-2155, Japanese Patent Publication No. 1-18183, and Japanese Patent Publication No. 4-334 are generally used.
No. 78, JP-A-3-140185, etc., a low melting point fiber is used as the thermally adhesive fiber, or a high melting point thermoplastic resin is used as a core portion and a low melting point thermoplastic resin is used as a sheath portion. It has been proposed to use a bicomponent fiber having a core-sheath structure.

[0004]

However, since these cushioning materials are inferior in breathability and moisture permeability and inferior in hygroscopicity, they are apt to be stuffy, and are used for seats installed in places exposed to rain or water splashes. As a result, water accumulates, and there is a problem that the seat is corroded and the water seeps out when the user sits on the seat, which gives the user discomfort.

Further, it has not been disclosed what is soft and hard to be worn, does not use CFC gas or the like in manufacturing, and has no adverse effect on the environment.

An object of the present invention is to provide a fiber mixture which solves the above problems, a fiber molded product using the same, and a method for producing a fiber molded product.

[0007]

The fiber mixture of the present invention comprises:
In order to solve the above-mentioned subject, it has the following composition. That is, a hollow three-layer composite fiber A4 having a hollow portion, which is formed by compounding an intermediate layer made of polyetheresteramide R1 between an outer layer made of polyester R2 and an inner layer.
A composite fiber B20 composed of 0 to 80% by weight of polyester R3 as a core and polyester R4 as a sheath.
In a fiber mixture consisting of 60% by weight, polyester R4 has a lower melting point than polyester R2 or R3 having a lower melting point, and the weight ratio represented by R3 / R4 is 4
It is a fiber mixture characterized by being in the range of 0/60 to 80/20.

The fiber molding of the present invention has the following constitution.

That is, 40 to 80% by weight of a hollow three-layered composite fiber A having a hollow portion, in which an intermediate layer made of polyetheresteramide R1 is compounded between an outer layer made of polyester R2 and an inner layer, and polyester R3 In a fiber mixture consisting of 20 to 60% by weight of a composite fiber B composed of a core portion and polyester R4 as a sheath portion, and the polyester R4 has a lower melting point than that of polyester R2 or R3 having a lower melting point, and R3 / R4 At least a part of the contact points between the composite fibers B and between the composite fibers B and the composite fibers A of the fiber mixture having a weight ratio of 40/60 to 80/20 represented by It is a fiber molded body characterized by the following.

Further, the method for producing a fiber molding of the present invention has the following constitution.

That is, 40 to 80% by weight of a hollow three-layered composite fiber A having a hollow portion, in which an intermediate layer made of polyetheresteramide R1 is compounded between an outer layer made of polyester R2 and an inner layer, and polyester R3 In a fiber mixture consisting of 20 to 60% by weight of a composite fiber B composed of a core portion and polyester R4 as a sheath portion, and the polyester R4 has a lower melting point than that of polyester R2 or R3 having a lower melting point, and R3 / R4 A fiber mixture having a weight ratio in the range of 40/60 to 80/20 is opened, blown into a breathable mold together with gas, and filled with a density of 0.015 to 0.10 g / cm ^3. Is a heat treatment at 80 to 200 [deg.] C., which is a method for producing a fiber molded body.

The present invention will be described in detail below.

The fiber mixture of the present invention is composed of a composite fiber A and a composite fiber B, and the fiber molded body has at least a part of the contact points between the composite fibers B and between the composite fibers B and A. It is worn and molded. 1 and 2 are schematic cross-sectional views showing an example of the composite fiber A used in the present invention,
1 shows a round hollow shape, and FIG. 2 shows a trilobal hollow shape.

The composite fiber A used in the present invention comprises two components, a polyether ester amide R1 and a polyester R2. The polyether ester amide R1 is a block copolymer having an ether bond, an ester bond and an amide bond in the same molecular chain. Is mentioned. For example, lactam,
One or more polyamide-forming components (a) selected from aminocarboxylic acids, salts of diamines and dicarboxylic acids and a polyetherester-forming component (b) consisting of dicarboxylic acids and poly (alkylene oxide) glycols Examples thereof include block copolymer polymers obtained by polycondensation reaction.

As the polyamide-forming component (a) of the polyether ester amide of the present invention, caprolactam,
Lactams such as enanthlactam, dodecanolactam and undecanolactam, ω-aminocarboxylic acids such as aminocaproic acid, 11-aminoundecanoic acid and 12-aminododecanoic acid, nylon-6,6, nylon-6,1
Examples thereof include nylon salts of diamine-dicarboxylic acid, which is a precursor of 0, nylon-6,12 and the like, and these can be used alone or in combination of two or more. Preferred polyamide-forming components are ε-caprolactam and nylon-6,6 salts.

On the other hand, examples of the polyether ester-forming component (B) constituting the soft segment of the polyether ester amide include dicarboxylic acids having 4 to 20 carbon atoms and poly (alkylene oxide) glycol. Examples of dicarboxylic acids having 4 to 20 carbon atoms include aliphatic dicarboxylic acids such as succinic acid, glutaric acid, adipic acid, vimelic acid, suberic acid, sebacic acid, and dodecadiic acid, terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid. Examples thereof include aromatic dicarboxylic acids such as acids and alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid.
One kind or a mixture of two or more kinds can be used. Preferred dicarboxylic acids are adipic acid, sebacic acid, dodecadic acid, terephthalic acid, isophthalic acid.

The poly (alkylene oxide) glycol may be polyethylene glycol, poly (1,2).
-Propylene oxide) glycol, poly (1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, random or block copolymerization of ethylene oxide and propylene oxide or tetrahydrofuran, and the like. . Poly (alkylene oxide)
The number average molecular weight of glycol can be used in the range of 300 to 10,000, preferably 500 to 4000.

The polyetheresteramide block copolymer of the present invention can be obtained by polycondensing the above-mentioned polyamide-forming component (a) and polyetherester-forming component (b). As an industrially preferable method, there is a method in which (a) and (b) are heated and polycondensed under reduced pressure. In order to obtain a polymer having a high degree of polymerization and little coloring, for example, antimony oxide or titanium is used. It is preferable to add an acid ester or the like as a polycondensation catalyst and phosphoric acid, a phosphoric acid ester or the like as a color preventing agent. The weight ratio of (a) and (b) in the polyether ester amide is 99/1.
It can be effectively used in the range of ˜5 / 95, preferably 80/20 to 10/90.

The polyether ester amide R1 is the main moisture absorbing component, and the mixed amount of the composite fiber A is such that the moisture absorption rate after standing for 24 hours in an atmosphere of 30 ° C. × 90% RH as a fiber mixture or a fiber molded product thereof. It is preferable to mix them so as to be 2% or more.

The upper limit of the moisture absorption rate is not particularly limited, and it is preferably high for comfortable use.

Generally, those having an upper limit of moisture absorption of about 100% are also preferably used.

The term "moisture absorption rate" as used herein refers to the value of the fiber mixture as a whole.

Although R2 is not particularly limited, for example, polyethylene terephthalate containing terephthalic acid, 2,6-naphthalenedicarboxylic acid or an ester thereof as a main dicarboxylic acid component and ethylene glycol or tetramethylene glycol as a main glycol component,
Polyester such as polybutylene terephthalate or polyethylene 2,6-naphthalate may be mentioned.

In addition, the polyester used for R2 includes sodium polyacrylate, poly-N-vinylpyrrolidone,
Moisture absorption of polyacrylic acid and its copolymer, polymethacrylic acid and its copolymer, polyvinyl alcohol and its copolymer, polyacrylamide and its copolymer, cross-linked polyethylene oxide polymer,
A water-absorbing substance, a general-purpose thermoplastic resin such as polyolefin or polyamide may be added to such an extent that the object of the present invention is not impaired.

In addition to the pigments such as titanium oxide and carbon black, it is also preferable to add an antioxidant, a coloring preventing agent, a lightproofing agent, an antistatic agent, etc. to the composite fiber A, if necessary. Such a composite fiber A can be manufactured by an ordinary composite spinning method.

Further, the cross-sectional shape of the composite fiber A may be not only a hollow hollow shape but also a hollow hollow with an irregular cross-section such as a polygon.

Next, in order to impart bulkiness and a soft feeling to the fiber molding of the present invention and improve the recovery property against compression,
The composite fiber A preferably has a mechanical crimp.

The number of crimps may be appropriately selected depending on the use of the fiber molding, but the number of crimps is at least 3 peaks / 25 m.
It is preferable that the crimping degree is at least 5% in m.

In order to impart more bulkiness and the like, it is preferable that this crimp is a latent crimp that is developed by asymmetric cooling during spinning.

The conjugate fiber A constituting the fiber mixture has a fineness of 0.5 to 30 denier and a fiber length of 10 from the viewpoint of imparting compression resistance and softness to a fiber molded product produced by using the fiber mixture. Short fibers of 100 mm are preferably used.

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

Composite fiber B is polyester R3, R4 2
R3 is not particularly limited, and examples thereof include terephthalic acid, 2,6-naphthalenedicarboxylic acid or an ester thereof as a main dicarboxylic acid component, and ethylene glycol or tetramethylene glycol as a main glycol component, polyethylene terephthalate, poly Examples include butylene terephthalate and polyester such as polyethylene-2,6-naphthalate.

Examples of the polyester R4 include polyolefins such as polyethylene, polypropylene, ethylene propylene copolymer, ethylene butene copolymer, ethylene vinyl acetate copolymer, and olefin copolymers,
At least one polymer selected from thermoplastic polymers such as polyesters such as polyhexamethylene terephthalate, polyhexamethylene butylene terephthalate and polyhexamethylene terephthalate isophthalate or copolymerized polyesters can be mentioned.

In selecting R4, the melting point of R4 is set lower than that of R2 or R3 having a lower melting point. From the viewpoint of thermal adhesiveness, it is preferably 20 ° C. or more, more preferably 25 ° C. or more.

From the viewpoint of the effect of adhesion and prevention of thermal deterioration, the melting point of R4 is preferably in the range of 80 to 170 ° C, and more preferably in the range of 100 to 170 ° C.

The weight ratio R3 / R4 in the composite fiber B is 4
It is set to 0/60 to 80/20. Preferably 5
It is 0/50 to 80/20. If the weight ratio of R4 is less than 20%, the thermal adhesiveness between the fibers cannot be sufficiently obtained, and there is a problem that the morphological fixability of the produced fiber molded product is deteriorated.

On the other hand, if the weight ratio of R4 exceeds 60%,
There is a problem that the soft feeling of the fiber molding is impaired and the compression residual strain becomes large.

In addition to the above, the composite fiber B may contain R if necessary.
In addition to pigments such as titanium oxide and carbon black other than 3, R4, antioxidants, anti-coloring agents, light stabilizers, antistatic agents and the like may be added. Such a composite fiber B can be manufactured by an ordinary composite spinning method.

Next, in order to impart bulkiness and a soft feeling to the fiber molded product of the present invention and improve the recovery property against compression,
It is preferred that the composite fiber B has a mechanical crimp.

The number of crimps may be appropriately selected depending on the use of the fiber molding, but the number of crimps is at least 3 peaks / 25 m.
It is preferable that the crimping degree is at least 5% in m.

The composite fiber B constituting the fiber mixture has a fineness of 0.5 to 3 from the viewpoint of imparting bulkiness and softness.
Short fibers having 0 denier and a fiber length of 10 to 100 mm are preferably used.

The fiber mixture of the present invention contains 40 to 80% by weight of the composite fiber A and 20 to 60% of the composite fiber B.
It is defined as weight%. If the content of the composite fiber B is less than 20% by weight, there is a problem that the number of thermal bonding points between the composite fibers B is reduced and the form fixing property is deteriorated.

When the composite fiber B exceeds 60% by weight, there is a problem that the softness of the fiber molded article is deteriorated and the feel becomes rough and hard.

In the present invention, the composite fiber A and composite fiber B in the above weight ratio are thoroughly mixed and opened by a cotton feeding machine, a cotton mixing machine and a fiber opening machine used in a usual spinning process, and a fiber mixture is obtained. Can be obtained. By sufficiently mixing and opening the fibers, the density and hardness of the fiber molding can be made uniform.

The method for producing the fiber molding of the present invention is as follows.

That is, the fiber mixture consisting of the composite fiber A and the composite fiber B is opened, and the air-permeable mold having a shape suitable for the purpose is blown and filled with a gas such as an air flow from a cotton feeding fan.

In order to blow and fill the mold, it is necessary that the mold has appropriate breathability. For example, JIS L10
79-1966 When measured with a Frazier type breathability tester, the breathability is 5 to 200 cc / cm ² · s.
A range of ec is preferred.

As such a mold, for example, dies 4 and 5 using a punching metal plate shown in FIG. 3 can be used. The fibers blown into the breathable formwork are
It is in a state of being randomly arranged in the horizontal direction and the thickness direction.

Next, the filled fiber mixture is compressed to a suitable density according to the intended use of the fiber molded body to be obtained. The density is 0.015 to 0.10 g / cm ³ . Preferably 0.020 to 0.095 g
/ Cm ³ . If the density is less than 0.015 g / cm ³ , there is a problem that the fiber mixture becomes too soft and the shape fixability deteriorates, and it becomes difficult to cut and mold into a desired shape.
When the density exceeds 0.10 g / cm ³ , there is a problem that the softness of the fiber mixture is lowered.

Further, the filled fiber mixture is heat-treated. The heat treatment temperature is set to 80 to 200 ° C. If the heat treatment temperature is lower than 80 ° C., sufficient thermal adhesiveness cannot be obtained, and if it exceeds 200 ° C., there is a problem that the fibers constituting the fiber mixture are thermally deteriorated.

By this heat treatment, at least a part of the contact points between the composite fibers B and at least a part of the contact points between the composite fibers B and the composite fibers A can be bonded. It is preferable to appropriately select the heat treatment time depending on the density of the fiber mixture.

[0052]

EXAMPLES 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.

[Number of Crimps and Degree of Crimp] The number of crimps and the degree of crimp are JIS L 1015-7-12-1 and JIS.
It measured according to the method of L1015-7-12-2.

[Fineness] JIS L 1015-7-51
It measured according to the method of A.

[Average Fiber Length (Cut Length)] JIS L
It was measured according to the 1015A method (staple diagram method). [Shrinkage rate] It was measured according to the method of JIS L 1015-7-15-2.

[Compression Residual Strain] A test piece 100 mm square having a side of 100 mm and a thickness of 100 mm was compressed by 50% in the thickness direction, treated in a constant temperature bath at a temperature of 70 ± 1 ° C. for 22 hours, and then compressed. The solution was left at room temperature for 30 minutes. afterwards,
The thickness (t ₁ mm) was measured, and the compression residual strain was determined by the following formula.

Compressive residual strain (%) = [(100-t ₁ ) /
100] × 100 [moisture absorption rate] From the weight of the fiber mixture or the fiber molded body in an absolutely dry state and the weight change after leaving it in a thermo-hygrostat for 24 hours in an atmosphere of 30 ° C. × 90% RH, It was calculated by the following formula. Moisture absorption rate (%) = (weight after moisture absorption-weight at absolute dryness) x 10
0 [Heat storage] test piece (vertical: 50 cm, horizontal: 50 cm,
(Thickness: 20 cm) The upper and side surfaces are covered with a vinyl chloride sheet, and the atmosphere in the initial room is set to 38 ° C x 45%, and the surface side of the vinyl chloride sheet is 70,000 lux, 70
The position temperature of 5 cm from the upper surface of the test piece when the light of 0 Kcal / m ² · hr was irradiated for 30 minutes was measured. [Density of fiber molding] Test piece (vertical: 20 cm, horizontal:
(20 cm, thickness: 20 cm) was allowed to stand in an atmosphere of 20 ° C. × 65% for 24 hours, and the weight (w) was measured and calculated by the following formula.

Density (g / cm ³ ) = w / 8000 [Fixation of shape and softness] The texture was classified into 6 grades from excellent (⊚) to unacceptable (×).

[Multidirectional cutting property] The test pieces were classified into 6 grades from excellent (⊚) to unacceptable (x) depending on the ease of cutting when cutting in arbitrary directions.

Example 1 As polyetheresteramide R1, 340 parts of ε-caprolactam, 18 parts by weight of terephthalic acid, 100 parts by weight of polyethylene glycol having a number average molecular weight of 1000, and Irganox 133 were used.
0 (manufactured by Ciba Geigy) and 0.01 part by weight of trimethyl phosphate were charged into a polymerization reaction vessel, and the mixture was heated and stirred under a nitrogen stream at 240 ° C. for 1 hour, and then 0.1 part by weight of antimony trioxide was added. Add and add 4 under the conditions of 250 ° C and 0.5 mmHg or less under the temperature increase / decrease program
By carrying out the time-dependent polymerization reaction, a polyether ester amide block copolymer having a nylon 6 component ratio of 45% by weight was obtained. The melting point of this copolymer is 176 ° C.
Then, orthochlorophenol solution (concentration 0.5 g / 10
0 ml) had a relative viscosity ηr at 25 ° C. of 2.05.

The moisture absorption of the copolymer alone was 15.2%. This R1 and polyester R2 have a melting point of 255
Using polyethylene terephthalate at ℃, spinning temperature 2
80 ° C, 24 spinneret holes, take-up speed 1350m /
Minutes, the weight ratio represented by R1 / inner R2 / front surface R2 is 4
Hollow ratio 29% with R1 between R2 of 0/30/30
The undrawn yarn of the composite fiber A having the hollow cross-section structure of No. 1 and asymmetrically cooled at the exit of the spinneret was spun.

Next, the unstretched yarns were combined to obtain a tow denier of 100,000 denier after stretching, stretched at a draw ratio of 3.0 times and at a stretching bath temperature of 80 ° C., and mechanical crimping was given by a crimper. Further, after drying with a heat setter at 70 ° C., a finishing oil agent is applied and cut into a cut length of 32 mm, a fineness of 5.9 denier and a crimp number of 7.1 threads / 25 m.
A composite fiber A having m and a crimping degree of 25.1% was obtained.

Separately from this, polyethylene terephthalate having a melting point of 255 ° C. is used as the thermoplastic polymer R3, and polyethylene terephthalate polyester having a melting point of 110 ° C. copolymerized with 40 mol% of isophthalic acid is used as the thermoplastic polymer R4. Temperature 285 ° C, Spinneret hole number 24
Hole, take-up speed 1350m / min, discharge rate 18.11g /
The unstretched yarn of the concentric composite fiber B having R3 having a weight ratio of 80/20 represented by R3 / R4 as a core and R4 as a sheath was spun.

Next, the unstretched yarns were combined to obtain a tow denier of 100,000 denier after stretching, stretched at a stretch ratio of 3.0 times and a stretching bath temperature of 80 ° C., and mechanical crimped by a crimper. Further, after drying with a heat setter at 70 ° C., a finishing oil agent is applied and cut into a cut length of 64 mm, a fineness of about 4.2 denier and a melting point of the surface layer of about 110.
C. was obtained.

60% composite fiber A and composite fiber B by weight ratio
Of 40%, and further mixed with a roller card and opened to obtain a fiber mixture. The fiber mixture was blown through the die inlet port 6 and the inner surface punched on each side was 500 × 500.
It was blown into the lower mold 3 of × 500 mm together with the air flow.
The fiber mixture 6 blown by the upper die 4 having each surface punched is compressed to have a packing density of 0.041 g / cm ³ ,
The thickness was fixed at 100 mm. The fiber mixture 6 compressed and fixed in the mold was heat set at 130 ° C. for 30 minutes using a heat setter used for setting spun yarn to obtain a fiber molded body.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 shows the characteristics of the composite fiber A and the composite fiber B constituting the fiber molded body.

[0068]

[Table 1] Table 2 shows the characteristics of the fiber molded body.

[0069]

[Table 2] [Example 2] R1 to R4 used are the same as those in Example 1, and the hollow ratio having R1 between R2 having a weight ratio of R1 / inner R2 / surface side R2 is 40/30/30. Two
5% of the composite fibers A and R3 having a hollow cross-section structure of 9%
A composite fiber B having 0% and R4 of 50% was obtained by the same method as in Example 1.

The composite fiber thus obtained contained 60% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.040 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 also shows the characteristics of the composite fiber A and the composite fiber B which compose the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 3] R1 to R4 used are the same as in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 40% and R4 of 60% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.040 g / cm ³ was obtained.

The fiber molding was hard to settle, was light and soft, and had a comfortable feeling in use.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 4] R1 to R4 used are the same as in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

The obtained composite fiber was 80% A by weight,
Compressed in the same manner as in Example 1 so that B becomes 20%,
A fiber molding having a packing density of 0.040 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable feeling in use.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 5] R1 to R4 to be used are the same as in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

The composite fiber thus obtained contained 40% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 60%,
A fiber molding having a packing density of 0.040 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 also shows the properties of the composite fiber A and the composite fiber B which compose the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Example 6] R1 to R4 used are the same as in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inside R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

The composite fiber thus obtained contained 60% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.015 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 7] R1 to R4 used are the same as those in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.020 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 8] R1 to R4 to be used are the same as those in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

The composite fiber thus obtained contained 60% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.051 g / cm ³ was obtained.

This fiber molded body was hard to settle, was light and soft, and had a comfortable feeling in use.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 9] R1 to R4 used are the same as those in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.076 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable feeling in use.

Table 1 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Embodiment 10] R1 to R4 used are the same as in Embodiment 1, and R1 is provided between R2 having a weight ratio of R1 / inside R2 / surface side R2 of 40/30/30. Composite fiber A having a hollow cross-section structure with a hollow ratio of 29%
A composite fiber B having R3 of 50% and R4 of 50% was obtained in the same manner as in Example 1.

The composite fiber thus obtained contained 60% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.099 g / cm ³ was obtained.

This fiber molding was hard to settle, was light and soft, and had a comfortable use feeling.

Table 1 also shows the properties of the conjugate fiber A and the conjugate fiber B which compose the fiber molded body.

Table 2 also shows the characteristics of the fiber molding.

[Comparative Example 1] R1 to R4 to be used are the same as in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having 90% R3 and 10% R4 were obtained by the same method as in Example 1.

The composite fiber thus obtained had a weight ratio of A of 60%,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.040 g / cm ³ was obtained.

However, since the weight ratio of R4 was less than 20%, the shape fixability was inferior.

Table 3 shows the characteristics of the composite fiber A and the composite fiber B constituting the fiber molded body.

[0118]

[Table 3] Table 4 shows the characteristics of the fiber molded body.

[0119]

[Table 4] [Comparative Example 2] R1 to R4 used are the same as in Example 1, and the hollow ratio having R1 between R2 having a weight ratio of R1 / inner R2 / surface side R2 is 40/30/30. Two
3% of the composite fibers A and R3 having a hollow cross-section structure of 9%
A composite fiber B having 0% and R4 of 70% was obtained in the same manner as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.041 g / cm ³ was obtained.

However, since the weight ratio of R4 exceeded 60%, this fiber molding was inferior in softness.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber molding.

[Comparative Example 3] R1 to R4 used are the same as in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

The composite fiber thus obtained contained 90% by weight of A,
Compressed in the same manner as in Example 1 so that B becomes 10%,
A fiber molding having a packing density of 0.041 g / cm ³ was obtained.

However, since the mixing ratio of the composite fiber B was less than 20% by weight, the shape fixing property by heat adhesion and the multidirectional cutting property were poor.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber moldings.

[Comparative Example 4] R1 to R4 used are the same as in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 30% by weight,
Compressed in the same manner as in Example 1 so that B becomes 70%,
A fiber molding having a packing density of 0.042 g / cm ³ was obtained.

However, since the mixing ratio of the composite fiber B exceeded 60% by weight, the softness was poor.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber moldings.

[Comparative Example 5] R2 to R4 to be used are the same as in Example 1, 50% of the composite fibers A and R3 having a hollow cross-section structure of only 29% with a hollow ratio of 29%,
A composite fiber B having R4 of 50% was obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.041 g / cm ³ was obtained.

However, since the composite fiber A did not contain R1, the moisture absorption was inferior.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber moldings.

[Comparative Example 6] R1 to R4 to be used are the same as those in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inner R2 / front surface R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.012 g / cm ³ was obtained.

However, the density of the fiber molding is 0.015 g.
Since it was less than / cm ^3, it was inferior in morphological fixability by heat adhesion and multidirectional cutting property.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber moldings.

[Comparative Example 7] R1 to R4 used are the same as in Example 1, and R1 is provided between R2 having a weight ratio of R1 / inside R2 / surface side R2 of 40/30/30. Composite fibers A having a hollow cross-section structure with a hollow ratio of 29% and composite fibers B having R3 of 50% and R4 of 50% were obtained by the same method as in Example 1.

A of the obtained composite fiber was 60% by weight,
Compressed in the same manner as in Example 1 so that B becomes 40%,
A fiber molding having a packing density of 0.111 g / cm ³ was obtained.

However, the density of the fiber molding is 0.10 g /
Since it exceeded cm ³ , the softness was poor.

Table 3 also shows the properties of the composite fiber A and the composite fiber B constituting the fiber molded body.

Table 4 also shows the characteristics of the fiber moldings.

[0149]

EFFECTS OF THE INVENTION According to the present invention, since air permeability and moisture permeability are large, it is difficult to stuffy and excellent in hygroscopicity, and since the residual compression strain is low, the form is stable, and while being light and soft, it is hard to settle, It is possible to obtain a fiber molded body having a comfortable feel. In addition, it has an excellent effect of shielding against heat and sound, and it is easy to mold according to the purpose of use, so it has the advantage of improving workability when manufacturing a fiber molded product, and because it can be manufactured without using CFC gas It has the advantage that it does not adversely affect.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a conjugate fiber A of the present invention.

FIG. 2 is a schematic cross-sectional view showing another example of the conjugate fiber A of the present invention.

FIG. 3 is a schematic perspective view showing an example of a mold used in the method for producing a fiber molded body of the present invention.

FIG. 4 is a schematic vertical cross-sectional view showing an example of a mold used in the method for producing a fiber molded body of the present invention.

[Explanation of symbols]

 1: Polyether ester amide R1 2: Polyester R2 3: Lower mold 4: Upper mold 5: Gas blowing port 6: Fiber mixture

Claims (6)

[Claims] 1. A hollow three-layered composite fiber A having 40 to 80% by weight of an intermediate layer composed of a polyether ester amide R1 compounded between an outer layer composed of polyester R2 and an inner layer, and polyester R3. A composite fiber B2 composed of a core and a polyester R4 as a sheath.
In a fiber mixture composed of 0 to 60% by weight, polyester R4 has a lower melting point than polyester R2 or R3 having a lower melting point, and the weight ratio represented by R3 / R4 is in the range of 40/60 to 80/20. A fiber mixture, characterized in that 2. The fiber mixture according to claim 1, which has a moisture absorption rate of 2% or more after being left for 24 hours in an atmosphere of 30 ° C. × 90% RH. 3. A composite fiber A having a fineness of 0.5 to 30 denier,
The fiber mixture according to claim 1 or 2, which is a short fiber having a fiber length of 10 to 100 mm, and the composite fiber B is a short fiber having a fineness of 0.5 to 30 denier and a fiber length of 10 to 100 mm. 4. At least a part of the contact points between the composite fibers B of the fiber mixture according to claim 1, 2 or 3 and between the composite fibers B and the composite fibers A are bonded and molded. A fiber molding characterized by the following. 5. Both the composite fiber A and the composite fiber B,
It has a crimp number of at least 3 peaks / 25 mm and a crimp degree of at least 5%, and a density of 0.015 to 0.10 g /
fiber molded article according to claim 4, characterized in that the cm ^3. 6. The fiber mixture according to claim 1, 2 or 3 is opened, blown into a breathable mold together with a gas, and filled with a density of 0.015 to 0.10 g / cm ³ 80
A method for producing a fiber molding, which comprises performing a heat treatment at ˜200 ° C.