JPH0978425A - Fiber formed body and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber formed body, having little compressive yield, soft, excellent in water permeability and draining and suitable for pad materials, cushion materials having deflecting properties, etc. SOLUTION: This production method of a fiber formed body having 5-20cm amount of deflection is to arrange an isophthalic acid copolyester R1 as a sheath and a polyethylene terephthalate R2 having temperature >=20 deg.C higher than that of the copolyester as a core, conjugably spin R1 and R2 in the ratio of R1 /R2 (weight ratio)=20/80-60/40 to obtain a sheath core conjugate fiber having 1-10 denier and 10-100mm fiber length, blend 20-60wt.% sheath-core conjugate fiber with 80-40wt.% polyethylene terephthalate fiber having 0.5-30 denier and 10-100mm fiber length, fill the blended fibers by blowing into an air permeable frame, adhesively heat treat the blended fibers in a compressed state at 80-200 deg.C, further add a polyethylene glycol block copolymerized polyester resin emulsion and heat treat the formed body, then compressively treat the formed body at < melting point of the copolymer R1 one or more times in the range of 5-80% in one direction or two directions perpendicular to the compressive direction after filling.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fiber molding. For more details, mainly bedding materials, mattresses, kotatsu, sofas for furniture, cushions, trains, seat materials for vehicles such as cars, pad materials, door trims, sun visors, cushioning materials such as clothing pads, and other filters. The present invention relates to a fiber molded body that is preferably used as a shielding material for housing sound insulation, heat insulation, and the like, and a method for manufacturing the fiber molded body.

[0002]

2. Description of the Related Art Conventionally, resin foam such as polyurethane has been mainly used as a cushion material. However, the resin foam has an environmental problem because it uses CFC gas or its substitute gas during foaming. In addition, it has low breathability and moisture permeability, and it easily gets damp, and when it is used for a sheet installed in a place where it is exposed to rain or water droplets, the rain and water droplets that hit the sheet accumulate due to its low water permeability. There was a case where the water was oozing out when the seat was corroded or when it was seated, which caused discomfort.

Cushion materials (fiber filling materials) for solving these problems are disclosed in Japanese Examined Patent Publication Nos. 62-2155, 1-18183, and 4-33478.
It is proposed in Japanese Patent Laid-Open No. 3-140185.
These cushioning materials use a low-melting point fiber as a heat-adhesive fiber, or use a high-melting point thermoplastic resin as a core part and a low-melting point thermoplastic resin as a sheath part. Although the use of fibers has produced some results, further improvement is desired.

[0004]

DISCLOSURE OF THE INVENTION The present invention is particularly flexible, hard to settle against compression, soft, and capable of preventing deterioration in compression recovery due to sticking between fibers when the use environment is high. An object of the present invention is to provide a fiber molded article having high moisture permeability, high water permeability, a comfortable feeling of use, good washability, particularly good drainage property in washing with water and fast drying rate, and an environmentally friendly fiber molding, and a method for producing the same. And

[0005]

The fiber molded article of the present invention comprises:
In order to solve the above-mentioned subject, it has the following composition. That is, in a fiber molded body composed of two or more kinds of fibers, one kind of constituent fibers has 20 to 60 fibers A having at least a thermoplastic polymer R1 having a lower melting point than the other fibers B on the fiber surface side. % Of the other fibers B and 80 to 40% by weight of the other fibers B.
Part of the contact points are substantially adhered, and most of the constituent fibers have their fiber axes arranged substantially parallel to the cross section (bdef) in the thickness direction of the fiber molded body, and the cross section in the thickness direction of the fiber molded body. (Bdef) is arranged in random directions, a polyester resin is applied to the surfaces of the constituent fibers, and the amount of flexure is 5 to 20 cm, which is a fiber molding.

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

That is, when two or more kinds of fibers are mixed, one to 20 kinds of fibers A having at least the thermoplastic polymer R1 having a lower melting point than the other fibers B on the fiber surface side are used.
60% by weight and 80 to 40% by weight of other fibers B are mixed, opened, filled in a breathable mold together with gas, heat-bonded in a compressed state, and further polyester resin is added. After heat treatment and fixing to form a fiber molded body in advance, at a temperature lower than the melting point of the thermoplastic polymer R1 of the fiber A, two directions in two directions perpendicular to the compression direction after the blow filling or two The method for producing a fiber molding is characterized in that the finish compression treatment is performed once or more within a range of 5 to 80% in one of the directions.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings with reference to embodiments. FIG.
FIG. 3 is a perspective view showing a model of an example of a block-shaped fiber array of the fiber molded body of the present invention.

The fiber molding of the present invention is composed of a fiber A having a thermoplastic polymer R1 having a melting point lower than that of the other fiber B at least on the fiber surface side and the other fiber B. Some of the contact points of the fibers B are substantially adhered, and most of the constituent fibers are arranged with their fiber axes substantially parallel to the cross section (bdef) in the thickness direction of the fiber molded body as shown in FIG. 1, for example. In addition, when the fibers are arranged in a random direction within the cross section (bdef) in the thickness direction of the fiber molded body and used as a cushion body, the number of fibers arranged in parallel to the thickness direction, that is, the direction to be subjected to the compression action increases. It has a structure that enhances compression recovery and repulsion.

Further, as shown in FIG. 1, most of the constituent fibers have their fiber axes arranged substantially parallel to the cross section (bdef) in the thickness direction of the fiber molded body, and the cross section (bdef) in the thickness direction of the fiber molded body. By arranging the bed mats in a random direction in (), for example, a cushioning material for a bed mat having a long ab line is formed, and the bed mat also deforms similarly when the bed is changed from the sleeping position to the sitting position. That is, it is possible to obtain a fiber molding having good flexibility. Regarding the degree of flexibility, it is necessary that the amount of bending is 5 to 20 cm according to the characteristic evaluation method described later. If it is less than 5 cm, the flexibility is poor and the mat floats from the bed or wrinkles are formed, which is not preferable. If it exceeds 20 cm, there is a defect that the handling property when moving the mat for washing or the like is deteriorated.

Further, most of the constituent fibers have their fiber axes arranged substantially parallel to the cross section (bdef) in the thickness direction of the fiber molded body, and have random directions within the cross section (bdef) in the thickness direction of the fiber molded body. By arranging them in such a manner, it is possible to obtain a fiber molded article that has high flexibility even though it has good flexibility, has high moisture permeability and water permeability, and is highly comfortable to use. .

The fiber A used in the present invention is a fiber having a thermoplastic polymer R1 having a melting point lower than that of the other fibers B on at least the surface side, and is mainly contacted with each other and with other fibers B by heat treatment. Some of the points have the property of being substantially fused, that is, they have thermal adhesiveness,
From the viewpoint of improving the use durability of the fiber molded product, a composite fiber in which a thermoplastic polymer R2 having a melting point higher than that of R1 by 20 ° C. or more is composited on the core side is more preferable.

Examples of the thermoplastic polymer R1 include polyolefins such as polyethylene, polypropylene, ethylene propylene copolymer, ethylene butene copolymer and ethylene vinyl acetate copolymer, olefin copolymers, polyhexamethylene terephthalate, poly At least one polymer selected from thermoplastic polymers such as polyesters such as hexamethylene butylene terephthalate and polyhexamethylene terephthalate isophthalate or copolymerized polyesters can be used. In selecting the thermoplastic polymer R1, it is necessary to be lower than the melting point of the above-mentioned thermoplastic polymer R2 and other fibers. The melting point is preferably 80 to 170 ° C. from the viewpoint of thermal adhesiveness between fibers and recoverability against compression, that is, residual compression strain.

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

The weight ratio (R1 / R2) of the thermoplastic polymers R1 and R2 is preferably 20/80 to 60/40, and more preferably 20 / The range of 80 to 50/50 is more preferable.

In addition to the fiber A, if necessary, R
1. In addition to polymer components other than 1, R2, pigments such as titanium oxide and carbon black, various antioxidants, anti-coloring agents, light-proofing agents, antistatic agents, etc., can be combined or mixed unless the original functions are lost. And the like. Such a composite fiber A can be manufactured by composite spinning.

From the viewpoint of obtaining a fiber molded product having a morphological stability and a uniform density, a short fiber having a fineness of 1 to 10 denier and a fiber length of 10 to 100 mm is preferably used as the fiber A.

The crimp of the fiber A may be appropriately selected depending on the intended use of the fiber molding, and in order to improve the bulkiness, softness, and recovery from compression, the number of crimps is 3 ridges / 25 mm.
As described above, the crimp is preferably 5% or more, and the number of crimps is 5
More preferably, the height is 25 mm or more and the crimp is 15% or more.

The other fiber B mixed with the fiber A is not particularly limited as long as it is higher than the melting point of the thermoplastic polymer R1, and if the component is higher than the low melting point component R1 of the fiber A, several types are used depending on the application. be able to. For example, in addition to polyester, 6-nylon, 66-nylon, 6
10-nylon, 109-nylon, 11-nylon,
Polyamide such as 12-nylon can be used, but polyester is preferable.

From the viewpoint of improving the use durability of the fiber molded body, the other fibers B preferably have a melting point higher than the melting point of the low melting point component R1 of the fiber A by 20 ° C. or more.

As the other fibers B, the fineness is 0.5 to 30 denier and the fiber length is 10 to 100 mm from the viewpoints of the bulk, compression resistance, compression recovery, touch, shape retention and density uniformity of the fibers. The short fibers of are preferably used.

The other crimps of the fiber B may be appropriately selected depending on the intended use of the fiber molding, and in order to improve the bulkiness, softness, and recovery from compression, the number of crimps is 3 ridges /
It is preferable that the crimp is 25 mm or more and the crimp is 5% or more, and it is more preferable that the number of crimps is 5 peaks / 25 mm or more and the crimp is 15% or more.

The fiber molding of the present invention comprises the above-mentioned fiber A
It is composed of 0 to 60% by weight and 80 to 40% by weight of other fibers B. When the amount of the fiber A is less than 20% by weight, the thermal bonding points between the fibers A and between the fibers A and the other fibers B are reduced, and the shape stability is deteriorated. On the other hand, when it is 60% by weight or more, the soft feeling of the fiber molded article is deteriorated and the tactile feeling becomes coarse and hard.

The fiber molding of the present invention comprises a polyester resin provided on the surface of the constituent fibers. The addition of this polyester resin enhances the smoothness between the constituent fibers,
It is soft and hard to set, and at the same time, it is possible to prevent deterioration of compression recovery due to sticking between fibers which is a problem when the use environment is high temperature.

The polyester resin used in the present invention is not particularly limited as long as it can improve smoothness and prevent sticking, but from the viewpoint of temperature stability and uniform application to constituent fibers, polyethylene is added to polyester. Those which block-polymerize glycol and have self-emulsifying property are preferably used.

Fibers A and B constituting the fiber molding
Is preferably polyester. Polyester is a preferable material in terms of comprehensive properties such as excellent compression properties (compression recovery property), heat-bonding form fixing property, low toxicity of combustion gas, and recyclability.

Next, the method for producing the fiber molding of the present invention will be described. FIG. 2 is a vertical cross-sectional view showing a model of a mold of an apparatus used in an example of the method for producing a fiber molded body of the present invention.

The fibers A and the other fibers B having the above weight ratios are thoroughly mixed and opened through a cotton feeding machine, a cotton mixing machine and a fiber opening machine used in a usual spinning process to prepare a fiber mixture, For example, the fiber mixture is blown into and filled in a mold having a shape suitable for the purpose together with a gas such as an air flow from a cotton feeding fan. In order to blow and fill, it is necessary that the formwork has an appropriate air permeability. Breathability is, for example, JI
S L 1079-1966 When measured with a Frazier type breathability tester, 5 to 200 cc / cm ² · sec
Is preferred. As such a formwork, for example,
The dies 1 and 2 using the punching metal plate shown in FIG. 2 can be used. The fibers 4 blown into the breathable mold through the blowing port 3 are in a state of being arranged randomly in the vertical direction, the horizontal direction, and the thickness direction.

Next, the filled fiber mixture is compressed to a density suitable for the intended use of the fiber molded body to be obtained. The density is preferably 0.01 to 0.1 g / cm ³ .

Further, this compression treatment is carried out by the cross section (bd) in the thickness direction of the fiber molding using the fiber shaft of the fiber molding of the present invention.
ef) is also arranged substantially parallel to it, which also has the effect of increasing the target flexibility.

The compressed packing is heat treated to substantially bond the fibers A and some of the contact points between the fibers A and the other fibers B to fix the morphology. Heat treatment temperature is fiber A
R1 may be at a temperature at which it melt-bonds, and generally,
80-200 degreeC is preferable. Next, in the present invention, a polyester resin is applied to the fiber molded body after the heat treatment, and the fiber molded body is heat treated and fixed. By adding the polyester resin, the smoothness between the constituent fibers can be increased, and the fibers can be made soft and difficult to set, and at the same time, it is possible to prevent sticking at the fiber contact point and improve the flame retardancy.

The applied amount of the polyester resin is expressed by the applied amount per unit fiber weight (hereinafter referred to as% owf). From the viewpoint of imparting smoothness, preventing sticking and economical efficiency, the polyester resin is added in an amount of 0.1 to 2% owf. It is preferable to adhere to a certain degree.

The temperature of the heat treatment for fixing the polyester resin to the constituent fibers is generally preferably 80 to 200 ° C. from the viewpoint of heat deterioration of the constituent fibers. The heat treatment time can be appropriately selected depending on the density and size of the fiber molding.

Next, according to the present invention, at a temperature lower than the melting point of the thermoplastic polymer R of the fiber A, two directions in the two directions perpendicular to the compression direction after the blow filling or one direction in the two directions. In addition, the fiber compact of the present invention is obtained by finishing secondary compression treatment once or more in the range of 5 to 80%.

Since the fiber molded article of the present invention has excellent compression elasticity, flexibility, moisture permeability and water permeability, it has a surface in the direction in which it is subjected to a compression action, for example, in a sitting position or a sleeping position. Many fiber axes of the constituent fibers are arranged substantially parallel to each other. For that purpose, the direction of the secondary compression treatment at the time of manufacturing the fiber molded body is the direction in which it is used, for example, the direction in which it is subjected to a compression action in the sitting or sleeping position, that is, the thickness direction of the application. In this case, the secondary compression treatment has an effect of previously removing unnecessary bonding points melt-bonded at R1 of the fiber A and improving soft feeling and compression recovery when the fiber molded body is used. If the secondary compression ratio is less than 5%, the soft feeling and compression recovery cannot be sufficiently enhanced, and if it exceeds 80%, a large amount of melt adhesion is broken and the use durability is lowered.

[0036]

Next, the present invention will be described more specifically with reference to examples. The measuring methods of various characteristics described in the present invention are as follows.

[Amount of Deflection] Three rectangular test pieces having a width of 10 cm, a thickness of 5 cm and a length of 50 cm were prepared, placed on a horizontal table, and the test pieces were slid so that the length was 30 cm from the edge of the table. After leaving it for 1 minute, the thickness direction of the fiber molded body (for example,
The difference in height (deflection amount cm) between the upper surface of the table and the lower surface of the tip of the test piece in the ac direction, bd direction, and ef direction) was read on a scale and shown as an average value of three times.

[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). [Compressive Residual Strain] Three cubic test pieces each having a side of 10 cm were prepared, and the thickness direction (for example, ac direction, b) of the fiber molded body was prepared.
70 ± 1 with 50% compression in d direction and ef direction)
After treatment in a constant temperature bath at a temperature of ° C for 22 hours, the sample was decompressed and left at room temperature for 30 minutes. Then, the thickness (t ₁ cm) was measured, and the compressive residual strain was calculated by the following formula and shown as an average value of 3 times.

Compressive residual strain (%) = {(10-t ₁ ) / 10} × 100 [Compressive stress loss] Three cubic test pieces each having a side of 10 cm were used.
Prepare individual pieces, draw a compression curve up to 200g / cm ² with a compression device of an Instron type tensile testing machine, and draw a recovery curve, and recover the recovery stress at the recovery rate equivalent to the compression strain rate at 100g / cm ² stress during compression. (Σ) was measured, and the compressive stress loss was calculated by the following formula, and shown as an average value of three times.

Compressive stress loss (%) = {(100-σ) /
100)} × 100 [Density] Three cubic test pieces each having a side of 10 cm were prepared and allowed to stand in a room at 20 ° C. × 65% RH for 24 hours.
The weight (W) of the test piece was measured in the chamber, and the density was calculated by the following formula, and the average value of three times was shown.

Density (cc / g) = 10 × 10 × 10 / W [Flexibility] Depending on the ease of bending when the ab line or the cd line in FIG. 1 is bent, it is easy to bend (⊚) to difficult to bend (×). It was classified into 6 levels.

[Handling of Fiber Molded Product, Soft Feel, Morphological Stability] The feel was classified into 6 grades from excellent (⊚) to poor (x).

[Examples 1 to 3 and Comparative Examples 1 to 3] Polyethylene terephthalate type polyester (intrinsic viscosity: 0.55, melting point: 110 ° C.) copolymerized with 40 mol% of isophthalic acid was used as the thermoplastic polymer R1. Ordinary polyethylene terephthalate (intrinsic viscosity: 0.65, melting point: 255 ° C.) was used as the thermoplastic polymer R2, spinning temperature 285 ° C., spinneret hole number 24 holes, take-up speed 1350 m.
/ Min, discharge rate 36.22 g / min, weight ratio R1 / R2 is 5
A core-sheath composite fiber A having a sheath of R1 and a core of R2 was spun at 0/50.

Next, the unstretched yarns are combined so that the tow denier after stretching is 100,000 denier, and the draw ratio is 3
The film was stretched at a stretching bath temperature of 80 ° C. twice and mechanically crimped with a crimper. Furthermore, after drying with a heat setter at 70 ° C,
Apply a finishing oil and cut to a cut length of 32 mm,
A composite short fiber A having a fineness of 3.9 denier and a melting point of the surface layer of about 110 ° C. was obtained.

Separately from this, polyethylene terephthalate having an intrinsic viscosity of 0.65 and a melting point of 255 ° C. was used, and after ordinary spinning and drawing, a cut length of 32 mm and a fineness of about 1
A short fiber B having a 3.1 denier hollow (hollow ratio 38%) and a circular cross section was obtained.

40% by weight of the composite short fibers A, short fibers B
Was mixed with 60% by weight and further mixed with a roller card and opened to obtain a fiber mixture. This fiber mixture was blown into the lower mold 1 having a width x length x height of 1000 x 1000 x 1000 mm of the inner surface, which was punched on each side, from the blow-in port 3 of the mold of Fig. 2 together with the air flow. Blown in. The fiber mixture 4 blown by the upper die 2 having each surface punched was compressed to a height of 500 mm and a density of 0.039 cc / g and fixed.

The fiber mixture 4 compressed and fixed in the mold was dry-heat set at 135 ° C. for 20 minutes with a large-sized dry heat setter of hot air forced circulation type, and the contact point between the composite short fibers A and the short fibers B and the composite short fibers were set. After forming a heat-bonded fiber molded body at a contact point between A, except for Comparative Example 1, the fiber molded body is immersed in a solution of a commercially available polyester resin (trade name SR1800 manufactured by Takamatsu Yushi Co., Ltd.), and after centrifugal dehydration, Using a large dry heat setter, heat treatment was performed at 140 ° C. for 30 minutes to fix. Further, a direction perpendicular to the compression direction of the obtained fiber molding is set as a vertical direction (thickness direction) and subjected to finish compression treatment with a large hydraulic machine at room temperature to obtain a fiber molding having a density of 0.04 cc / g. It was

Table 1 shows the properties of the obtained fiber molding. In Examples 1, 2 and 3, the amount of polyester resin applied was 0.9% owf, the compression ratio was 5 to 80%, and the final compression treatment was performed 1 to 5 times. Since they are arranged in the direction parallel to the surface of the thickness direction, the compression stress loss is low and the amount of bending is high, the compression residual strain is a little low, and the flexibility, handleability of the fiber molding, softness and morphological stability As a result, a good fiber molded product was obtained. On the other hand, in Comparative Example 1, the blown fiber mixture 4 was compressed, fixed to a height of 500 mm and a density of 0.039 cc / g, and dry-heat set with a large dry heat setter at 135 ° C. for 20 minutes. The obtained fiber molded body was not subjected to polyester resin application and finish compression treatment, and the compression direction was the thickness direction. Therefore, since the fiber axes of the constituent fibers are arranged in a direction perpendicular to the plane in the thickness direction of the fiber molded body and the finishing compression treatment is not performed, the handleability and the morphological stability of the fiber molded body are good. But,
The compressive stress loss was high, the compressive residual strain was rather high, and the flexibility and softness were poor. In Comparative Example 2, the applied amount of the polyester resin is 0.9% owf, but the finish compression treatment is not performed. Therefore, the fiber axes of the constituent fibers are arranged in a direction parallel to the surface in the thickness direction of the fiber molded body, but since the finish compression treatment is not performed,
The fiber molded product had good handleability, morphological stability, compressive stress loss, and softness, but had a low amount of bending and poor flexibility. Further, in Comparative Example 3, the amount of the polyester resin applied was 0.9% owf and the compression ratio was 82%, and the compression treatment was performed up to 5 times. Since they were arranged in parallel to each other and the degree of finishing compression treatment was too high, the flexibility, the handleability of the fiber molded product and the softness were good, but the morphological stability was poor.

In each of Examples 1 to 3 and Comparative Examples 1 to 3, flame retardancy could be indicated by the evaluation method of Japan Railway Vehicle Machinery Association.

[0052]

[Table 1] [Examples 4 to 5 and Comparative Examples 4 to 5] Fibers A and B were produced in the same manner as in Example 1, fibers A and B were mixed in the same manner as in Example 1, and only the mixing ratio was changed. A molded product was obtained by applying a polyester resin to the fiber molded product and fixing it, and then a final compression treatment was performed 5 times at a compression ratio of 50% to obtain a molded product having a density of 0.04 cc / g.

Table 1 shows the properties of the obtained fiber molding. In Examples 4 and 5, the blending ratio of the fiber A was 20.
Since the fiber axes of the constituent fibers are arranged in a direction parallel to the plane in the thickness direction of the fiber molded body, the compressive stress loss is low, and the amount of bending is high, the compressive residual strain is high. And the flexibility, the handling property of the fiber molded product, the softness, and the morphological stability were excellent. On the other hand, in Comparative Example 4, the mixing ratio of the fiber A was set to 18% by weight, and the fiber axes of the constituent fibers were arranged in the direction parallel to the plane in the thickness direction of the fiber molded body, and the polyester resin was added. Since the compression stress loss is low and the amount of flexure is high, the compression residual strain is low, and the flexibility and softness are excellent, but the blending ratio of the fiber A is less than 20% by weight, and the fiber molding The handleability and morphological stability of the body were slightly inferior. Further, in Comparative Example 5, the mixing ratio of the fiber A is 62% by weight.
Since the fiber axes of the constituent fibers are arranged in a direction parallel to the surface of the fiber molded body in the thickness direction and the polyester resin is added, the compressive stress loss is low and the amount of bending is high. Although the compression residual strain was low, the flexibility, the handleability of the fiber molded product, and the morphological stability were excellent, the softness was somewhat inferior because the mixing ratio of the fiber A exceeded 60% by weight.

[0054]

EFFECTS OF THE INVENTION According to the present invention, it is particularly flexible and hard to settle against compression, is soft, and can prevent deterioration of compression recovery due to sticking between fibers when the use environment is high, and It is possible to provide a fiber molded article having a high wetness and water permeability, a comfortable feeling of use, a good washability, particularly a good drainage property in washing with water and a fast drying rate, and an environmentally friendly fiber molding, and a method for producing the same.

[Brief description of drawings]

FIG. 1 is a model perspective view showing an example of a block-shaped fiber molding of the present invention.

FIG. 2 is a vertical cross-sectional view showing a model of an example of an apparatus used in the method for producing a fiber molded product of the present invention.

[Explanation of reference numerals] 1: Lower mold 2: Upper mold 3: Gas blowing port 4: Fiber mixture

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location D04H 1/64 D04H 1/64 A

Claims (8)

[Claims] 1. A fiber molded article composed of two or more kinds of fibers, wherein one kind of constituent fibers comprises a fiber A having at least a thermoplastic polymer R1 having a lower melting point than the other fibers B on the fiber surface side. 20-60% by weight, other fiber B 80-4
0% by weight, and the fibers A and fibers B and a part of the contact points of the fibers A and B are substantially adhered to each other, and most of the constituent fibers are fibers with respect to the cross section (bdef) in the thickness direction of the fiber molded body. The axes are arranged substantially parallel to each other, and the fibers are arranged in random directions within the cross section (bdef) in the thickness direction of the fiber molding, and the polyester resin is applied to the surfaces of the constituent fibers, and the bending amount is 5 to 20 cm. A fiber formed body characterized by being present. 2. The melting point of the fiber A is 20 ° C. higher than that of the other fibers B.
The fiber molding according to claim 1, which has the low thermoplastic polymer R1 at least on the fiber surface side. 3. A fiber A is a composite fiber comprising two different components of a thermoplastic polymer R1 and a thermoplastic polymer R2, the thermoplastic polymer R1 being the fiber surface side, and having a melting point of 20 or more than R1. The thermoplastic polymer R2 having a temperature higher than ℃ is used as the core side, and the weight ratio of R1 / R2 is 20/80 to 60/40.
The fiber molded body according to claim 1 or 2, wherein 4. The fiber molding according to claim 1, 2 or 3, wherein both the fiber A and the fiber B are polyester. 5. The fiber A is a short fiber having a fineness of 1 to 10 denier and a fiber length of 10 to 100 mm, and the fiber B is a fineness of 0.5.
It is a short fiber having a fiber length of 10 to 100 mm and a denier of 30 to 30, and the fiber molded body according to claim 1, 2, 3, or 4. 6. A polyester-based resin, which is self-emulsifying by block-polymerizing polyester with polyethylene glycol.
The fiber molding according to 3, 4, or 5. 7. When mixing two or more kinds of fibers, one kind is 20 to 60% by weight of the fiber A having at least the surface of the thermoplastic polymer R1 having a melting point lower than that of the other fibers B, and the other fibers. 80% to 40% by weight of B is mixed, opened, filled in a breathable form with gas, heat-bonded in a compressed state, and further provided with a polyester resin,
After heat treatment and fixing to form a fiber molded body in advance,
At a temperature lower than the melting point of the thermoplastic polymer R1 of the fiber A, one of two directions perpendicular to the compression direction after the blow filling is used.
Direction or one of two directions is subjected to finish compression treatment once or more within a range of 5 to 80%. 8. The method for producing a fiber molded article according to claim 7, wherein the heat-bonding treatment is carried out at a temperature of 80 to 200 ° C.