JP3160249U - Fiber cushion material - Google Patents

Abstract

[Problem] To provide a fiber cushion material that has excellent elasticity and cushioning properties, can reduce stuffiness due to a large amount of sweat, can suppress the occurrence of condensation due to temperature change on the back surface of the cushion material, and is easy to dry after water washing. . An inelastic crimped short fiber, and a heat-adhesive composite short fiber in which a polymer having a melting point lower by 25 ° C. or more than a polymer constituting the inelastic crimped short fiber is disposed on a surface thereof as a heat fusion component, Is bonded to the weight ratio of 90/10 to 10/90, and the heat-adhesive composite short fibers are heat-sealed in a state where the heat-adhesive composite short fibers cross each other and / or the heat-adhesive composite short fibers and the non-elasticity A fiber cushion material is obtained by using a fiber structure in which fixing points thermally fused in a state where the short fibers are crossed are scattered and at least one surface has a V-shaped groove. [Selection] Figure 1

Description

  The present invention relates to a fiber cushion material that is excellent in elasticity and cushioning properties, reduces stuffiness due to a large amount of perspiration, can suppress the occurrence of condensation due to temperature changes on the back surface of the cushion material, and is easy to dry after water washing.

  Conventionally, as fiber cushion materials used for bedding mats, various vehicle seats, furniture cushions, etc., after short fibers containing heat-adhesive short fibers are made into a web, heat-bonding of the heat-adhesive short fibers is performed. A fiber cushion material in which a fixing point is formed is known (see, for example, Patent Document 1 and Patent Document 2).

  However, although the conventional ones are excellent in elasticity and cushioning properties, there are problems that stuffiness occurs due to a large amount of perspiration and condensation occurs due to temperature changes on the back side of the fiber cushion material.

JP-A-8-318066 JP 2007-308831 A

  The present invention has been made in view of the above background, and is excellent in elasticity and cushioning, can reduce stuffiness due to a large amount of perspiration, can suppress the occurrence of condensation due to temperature changes on the back of the cushioning material, and The object is to provide a fiber cushion material which is easy to dry after water washing.

  As a result of intensive studies to achieve the above object, the present inventor has found that when a cushion material is obtained using a fiber structure composed of inelastic crimped short fibers and heat-adhesive composite short fibers, By forming a groove, it is possible to reduce stuffiness due to a large amount of sweating, and it is possible to suppress the occurrence of condensation due to temperature changes on the back surface of the cushioning material. I came up with it.

Thus, according to the present invention, “a thermal adhesive property in which a non-elastic crimped short fiber and a polymer having a melting point lower by 25 ° C. or more than the polymer constituting the non-elastic crimped short fiber are arranged on the surface as a thermal fusion component. Adhesive points and / or the heat-adhesive composites blended with the composite short fibers in a weight ratio of 90/10 to 10/90 and heat-sealed in a state where the heat-adhesive composite short fibers intersect with each other Including a fiber structure in which short fibers and the non-elastically crimped short fibers intersect with heat-bonded fixing points interspersed, and a V-shaped groove is formed on at least one surface of the fiber structure A fiber cushion material characterized by being made.
Is provided.

At this time, it is preferable that V-shaped grooves are formed in a lattice shape on at least one surface of the fiber structure. In the V-shaped groove, the depth is 20 to 30 mm, the width is 30 to 50 mm, and the interval between adjacent V-shaped grooves is 50 to 100 mm in terms of the center line interval of the V-shaped grooves. It is preferable to be within the range. Further, the inelastic crimped short fibers or the heat-adhesive composite short fibers are preferably arranged in the thickness direction of the fiber structure. The inelastic crimped short fiber is preferably a polyester fiber. Moreover, it is preferable that the heat-fusion component which comprises the said heat bondable composite staple fiber is a polyester-type elastomer. The fiber structure preferably has a thickness of 50 to 300 mm and a density of 20 to 50 kg / m ³ . In the fiber structure, a three-dimensional knitted fabric is preferably laminated on the surface opposite to the surface where the V-shaped groove is formed. Moreover, it is preferable that the fiber cushion material is for bedding, furniture, or a vehicle seat.

  According to the present invention, a fiber cushion material that has excellent elasticity and cushioning properties, reduces stuffiness due to a large amount of sweat, can suppress the occurrence of condensation due to temperature changes on the back surface of the cushion material, and is easy to dry after water washing Is obtained.

It is a figure which shows typically the fiber cushion material which concerns on this invention. It is a figure which shows typically a mode that V-shaped groove | channel is formed in the grid | lattice form. It is a schematic diagram for demonstrating the measuring method of T / H.

  Hereinafter, embodiments of the present invention will be described in detail. The inelastic crimped short fibers in the present invention include natural fibers such as cotton and wool, inorganic fibers such as carbon fibers, cellulosic fibers, aramid, polyolefin and polyester synthetic fibers, as well as cotton and wool. Recycled fiber called so-called can also be used. Among these, synthetic fibers are preferable from the viewpoint of handleability and recyclability. In particular, polyethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polytetramethylene terephthalate, poly-1,4-dimethylcyclohexane terephthalate, polyethylene naphthalate, polypivalolactone, polylactic acid (PLA), stereocomplex polylactic acid, etc. And short fibers made of these polyesters or copolymers thereof, or mixed cotton of these short fibers, or composite short fibers made of two or more of the above polymer components. In addition, polyester that has been material-recycled or chemically recycled, polyethylene terephthalate that uses a monomer component obtained from biomass, that is, a biologically-derived substance, described in JP2009-01694, The short fiber which consists of polyester etc. which were obtained using the catalyst containing a specific phosphorus compound and a titanium compound as described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient. Among these short fibers, short fibers made of polyethylene terephthalate or polybutylene terephthalate are particularly preferable from the viewpoint of fiber forming property and the like.

  In the above-mentioned inelastic crimped short fibers, the cross-sectional shape of the single fiber may be any of ordinary round, flat, constricted flat such as four-sided flat, triangle or square polygon, hollow such as round hollow or triangular hollow, etc. .

  In the above-mentioned inelastic crimped short fibers, the single yarn fineness is preferably 2 to 700 dtex (more preferably 4 to 200 dtex, particularly preferably 5 to 10 dtex). If the single yarn fineness is smaller than 2 dtex, the bulkiness may be insufficient, and the cushioning property and the resilience may be poor. On the other hand, if the single yarn fineness is larger than 700 dtex, it is difficult to form a web, and if it has the same basis weight, the number of fibers constituting the fiber cushion material is reduced, so that sufficient cushioning properties may not be obtained. The fiber length of the inelastic crimped short fiber is preferably cut to 3 to 100 mm.

  In the inelastic crimped short fibers, the number of crimps is preferably 4 to 25 pieces / 2.54 cm (preferably 7 to 15 pieces / 2.54 cm), and the crimp rate is 20 to 35%. It is preferable. If the number of crimps and the crimp rate are smaller than these ranges, the web is difficult to be bulked, and there is a possibility that it will be difficult to form a web. At the same time, the cushioning material has poor resilience, and there is a risk that only a low durability material can be obtained. On the other hand, if the number of crimps and the crimp rate are larger than these ranges, the bulkiness of the web is low, and only a high-density cushioning material can be obtained, or the entanglement of the fibers becomes strong and streaks during web formation. There is a risk that unevenness of the surface is likely to occur.

  In addition, as a method for imparting crimps, spiral crimps are imparted using composite fibers obtained by bonding polymers having different heat shrinkage rates to side-by-side types, spiral crimps are imparted by anisotropic cooling, and a normal indentation crimper method is used. Various methods such as imparting mechanical crimp may be used, but it is optimal to impart mechanical crimp from the viewpoints of bulkiness and manufacturing cost.

  On the other hand, the low-melting polymer having a melting point of 25 ° C. or more (more preferably 25 to 150 ° C.) lower than the melting point of the polymer constituting the inelastic crimped short fiber is at least as a heat-bonding component. Short fibers placed on the surface. The heat-fusion component is melted by heating, and the intersection between the heat-adhesive short fibers and the intersection between the heat-adhesive short fibers and the inelastic crimped short fibers are fused. At that time, if the difference in melting point is less than 25 ° C., the processing temperature is close to the melting point temperature of the non-elastic crimped short fiber, so that the physical properties and crimp characteristics of the non-elastic crimped short fiber or the cushioning property of the fiber cushion material are lowered. In addition, there is a fear that the shrinkage rate at the time of molding may increase, which is not preferable.

  The fibers constituting the heat-adhesive short fibers include copolymer polyester fibers, thermoplastic elastomer fibers, polyolefin fibers, polyvinyl alcohol fibers, and composites having a composite form formed of a heat fusion component and a core component. Examples thereof include fibers. In particular, a composite fiber having a heat fusion component is preferable because of its excellent shape retention stability and moldability. In cushion applications where the amount of compression, that is, the amount of deformation is large due to repeated compression deformation, deformation is easy when deformation stress is applied to the fixing point (fusion point), and restoration is performed without leaving distortion when the deformation stress is removed. It is preferable to do. When a large amount of deformation is applied to the fiber cushion material, a force such as a larger angle change, expansion, or twist is applied to the fixing point included in the fiber cushion material. For this reason, it is preferable that the low melting-point polymer which forms a heat-fusion component is a thermoplastic elastomer. In particular, when the fiber cushion material is subjected to compression treatment as described later, in a low melting point polymer having low elongation and low elastic recovery rate, the fixing point is excessively broken, and the compression hardness is remarkably lowered. The thickness may not be obtained. In contrast, thermoplastic elastomers have a high degree of elongation and a high elastic recovery rate. Therefore, when compression treatment is applied to the fiber cushion material, only weakly bonded points that have been temporarily fused will come off and peel off, resulting in an appropriate compression hardness (soft Property).

  As such a thermoplastic elastomer, a polyester elastomer having heat resistance and capable of high temperature thermoforming is particularly preferable. Polyester ester copolymer is a polyetherester copolymer obtained by copolymerizing thermoplastic polyester as a hard segment and poly (alkylene oxide) glycol as a soft segment, more specifically terephthalic acid, isophthalic acid, phthalic acid, naphthalene. -2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4'-dicarboxylic acid, alicyclic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid, succinic acid, oxalic acid, adipic acid , At least one dicarboxylic acid selected from aliphatic dicarboxylic acids such as sebacic acid, dodecanedioic acid and dimer acid, or ester-forming derivatives thereof, 1,4-butanediol, ethylene glycol trimethylene glycol, tetramethylene Glycol, penta Aliphatic diols such as tylene glycol, hexamethylene glycol neopentyl glycol, decamethylene glycol, or alicyclic diols such as 1,1-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, tricyclodecane methanol, or esters thereof Polyethylene glycol, poly (1,2- and 1,3-polypropylene oxide) glycol, poly (tetramethylene oxide) having at least one diol component selected from formable derivatives and the like, and an average molecular weight of about 400 to 5000 A ternary copolymer composed of at least one of poly (alkylene oxide) glycols such as glycols, copolymers of ethylene oxide and propylene oxide, copolymers of ethylene oxide and tetrahydrofuran, etc. It can be mentioned coalescence.

  In particular, a block copolymer polyether ester having polybutylene terephthalate as a hard component and polyoxybutylene glycol as a soft segment is preferable from the viewpoint of adhesiveness with inelastic crimped short fibers, temperature characteristics, and strength. In this case, the polyester portion constituting the hard segment is polybutylene terephthalate in which the main acid component is terephthalic acid and the main diol component is a butylene glycol component. Of course, part of this acid component (usually 30 mol% or less) may be substituted with another dicarboxylic acid component or oxycarboxylic acid component, and part of the glycol component (usually 30 mol% or less) is also butylene. It may be substituted with a dioxy component other than the glycol component. Further, the polyether portion constituting the soft segment may be a polyether substituted with a dioxy component other than butylene glycol.

When the heat-adhesive short fibers are composite fibers, the polymer forming the core component is polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polytetramethine terephthalate, poly-1,4. -Dimethylcyclohexane terephthalate, polypivalolactone or a copolymer ester thereof can be used.
In addition, various stabilizers, ultraviolet absorbers, thickening branching agents, matting agents, coloring agents, other various improving agents, and the like may be blended in the above-described polymer as necessary.

  When the heat-adhesive short fiber is a composite fiber, it is preferable that the heat-sealing component occupies at least a half of the surface area. It is appropriate that the weight ratio of the heat fusion component and the core component is in the range of 30/70 to 70/30 as a composite ratio. The composite form is not particularly limited as long as at least the heat fusion component is exposed on the surface, and examples include a side-by-side type, a core-sheath type, and an eccentric core-sheath type.

  In the heat-adhesive short fibers, the single yarn fineness is preferably 2 to 170 dtex (more preferably 1 to 15 dtex, particularly preferably 2 to 10 dtex), the fiber length is 38 to 255 mm, and the number of crimps is 4 to 70. A range of /2.54 cm is preferred. If it is out of this range, the process stability such as blended cotton and web formation may be deteriorated. Moreover, there exists a possibility that the cushion performance and compression durability of a fiber cushion material may fall.

  In the present invention, the fiber structure was heat-sealed in a state where the heat-adhesive short fibers intersect with each other by heat-treating the inelastic crimped short fibers and the heat-adhesive short fibers. The fixing points and the fixing points heat-sealed in a state where the heat-adhesive short fibers and the inelastic crimped short fibers intersect with each other are scattered. At that time, it is important that the weight ratio of the inelastic crimped short fibers to the heat-bonded short fibers is 90/10 to 10/90. When the ratio of the heat-adhesive short fibers is smaller than this range, the fixing points are reduced, and the compression resilience and compression durability may be reduced. On the contrary, when the ratio of the heat-adhesive short fibers is larger than this range, it is difficult to obtain a desired molded product shape due to the shrinkage of the heat-adhesive short fibers, and quality control in production is difficult, which is preferable. Absent.

  Here, it is preferable that the heat-bondable composite short fibers and the inelastic crimped short fibers are arranged in the thickness direction of the fiber structure. Here, “arranged in the thickness direction” means that the total number of fibers arranged in parallel to the thickness direction of the fiber structure is (T) as shown in FIG. When the total number of fibers arranged perpendicular to the body thickness direction is (W), T / W is 1.5 or more.

  In the fiber structure, it is important that V-shaped grooves are formed on at least one surface (preferably only on one surface). When the V-shaped groove is formed on at least one surface of the fiber structure, the surface on which the V-shaped groove is formed is opposite to the human body side (that is, the back surface of the cushion material). ) When a fiber cushion material is used, it is possible to reduce stuffiness caused by a large amount of perspiration, and to suppress the occurrence of condensation due to a temperature change on the back surface of the cushion material.

As shown in FIG. 1, the V-shaped groove is a groove formed on the surface of the fiber structure, and the width of the V-shaped groove becomes narrower as the groove width becomes narrower. The width is measured, and the depth of the V-shaped groove is the depth of the deepest part.
Here, as shown in FIG. 2, it is preferable that the V-shaped grooves are formed in a lattice shape because the effect of reducing moisture and the effect of suppressing the occurrence of condensation are further improved.

  In the V-shaped groove, the depth is 20 to 30 mm, the width is 30 to 50 mm, and the interval between adjacent V-shaped grooves is 50 as the center line interval (W) of the V-shaped grooves. When it is in the range of ˜100 mm, the effect of reducing stuffiness and the effect of suppressing the occurrence of condensation are further improved, which is preferable.

Moreover, in the said fiber structure, the density of the range of 20-50 kg / m < ³ > is preferable. If the density of the fiber structure is smaller than the above range, the resilience and compression durability may be reduced. On the other hand, if the density of the fiber structure is larger than the above range, it may become hard.

  The thickness of the fiber structure is preferably 50 to 300 mm. If the thickness of the fiber structure is less than 50 mm, cushioning properties may not be sufficiently exhibited. On the contrary, if the thickness of the fiber structure is larger than 300 mm, the handleability may be impaired.

  In the present invention, a fiber cushion material may be constituted by the fiber structure alone, but it is preferable to laminate a fabric such as a woven fabric, a knitted fabric or a non-woven fabric. In this case, as the fabric, a three-dimensional knitted fabric is preferable. In particular, it is preferable that a three-dimensional knitted fabric is laminated on the surface opposite to the surface on which the V-shaped groove is formed, because excellent air permeability, cushioning properties, and high appearance are obtained. As such a three-dimensional knitted fabric, a solid knitted fabric having a thickness of 2 to 50 mm, which is composed of a two-layer knitted fabric (preferably a mesh) and a monofilament connecting yarn connecting the two-layer knitted fabric, is preferable. Among commercially available products, for example, Fusion (registered trademark) manufactured by Asahi Kasei Corporation is preferable.

  The said fiber structure can be manufactured with the following manufacturing methods, for example. First, a web is prepared in which the above-described inelastic crimped short fibers and heat-bondable composite short fibers are mixed so that the weight ratio is 90/10 to 10/90.

  Next, the web is temporarily fused with a far-infrared ray or hot air heater as necessary, laminated according to a predetermined density and thickness, and then placed in a mold having a chevron on the surface in contact with the web. Then, a method in which the pressure is reduced to 50 Torr or less using a steam kettle, and then wet heat-treated for a certain period of time, followed by cooling and drying is preferable. Further, it is preferable to heat the web by compressing and holding between the two upper and lower plates, each of which is provided with an angled convex portion on one plate.

  Here, the webs may be laminated or heated as they are, or heat treatment as shown in FIG. 2 of JP-A-2007-308831 in order to arrange the fibers constituting the fiber structure in the fiber thickness direction. Using a machine (Struto equipment manufactured by Struto, etc., commercially available), the heating roller is pushed into a hot-air suction heat treatment machine set above the melting point of the low-melting polymer by the driving roller, and then heated in an accordion type. May be.

  Further, as described above, when another fabric is laminated on the fiber structure, the fabric may be bonded to the fiber structure with an adhesive, but the web and the fabric are simultaneously placed in a mold and subjected to a wet heat treatment. Alternatively, it is preferable to compress and hold between the upper and lower plates in a state where the web and the fabric are laminated and heat-bond them by heating.

  In the fiber cushion material of the present invention, accessories other than the fabric may be added. Further, the shape of the fiber cushion material is not limited to a flat plate shape, and may be an arbitrary shape. Furthermore, known functional processing such as normal water repellent processing, flameproof processing, flame retardant processing, and negative ion generation processing may be added.

  In the fiber cushion material of the present invention, since a V-shaped groove is formed on at least one surface of the fiber structure, air is easily convected, reducing the stuffiness caused by a large amount of sweat, and the temperature on the back surface of the cushion material. It is possible to suppress the occurrence of condensation and mold due to changes. In addition, since the fiber structure is composed of the inelastic crimped short fibers and the heat-bondable composite short fibers as described above, it has excellent elasticity and cushioning properties and is easy to dry after washing with water. It can be melted later and recycled again to new fibers, molded plastics, etc., and has the excellent effect of generating less toxic gas when burned.

  The fiber cushion material of the present invention can be particularly suitably used as a mat material for bedding, a furniture cushion having a three-dimensional curved shape and thickness, and a vehicle seat cushion, but may be used for other purposes. At that time, it is preferable that the surface on which the V-shaped groove is formed be the back surface of the cushion material (that is, the surface opposite to the human body side), but the front and back surfaces may be reversed.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail by an Example, this invention is not limited to this. In addition, each measurement item in an Example was measured with the following method.

(1) Melting point Using a differential thermal analyzer 990 type manufactured by Du Pont, measured at a temperature rise of 20 ° C./min, and found a melting peak. If the melting temperature is not clearly observed, the melting point is the temperature at which the polymer softens and begins to flow (softening point) using a trace melting point measuring device (manufactured by Yanagimoto Seisakusho). In addition, the average value was calculated | required by n number 5.

(2) Intrinsic viscosity Measured at 35 ° C. using orthochlorophenol as a solvent. In addition, the average value was calculated | required by n number 5.

(3) Number of crimps and crimp rate Measured by the method described in JIS L 1015. In addition, the average value was calculated | required by n number 5.

(4) Cushioning properties Ten skilled workers sat on a fiber molded body for cushioning materials and performed sensory evaluation on cushioning properties and sitting comfort based on the following criteria.
Grade 4: Very good (elastic), Grade 3: Slightly good (slightly resilient), Grade 2: Slightly poor (slightly hard), Grade 1: Poor (hard)

(5) Anti-steaming After 10 experts walk for 10 minutes in a room with a temperature of 25 ° C and a humidity of 65% RH, they sit on the fiber molded body for cushioning material and are sensually based on the following criteria. Evaluation was performed.
4th grade: Very good (not steamed) 3rd grade: Somewhat good (hard to steam) 2nd grade: Somewhat bad (slightly steamed) 1st grade: Bad (steamed)

(6) Condensation suppression property A fiber cushion material having a length of 50 cm and a width of 50 cm was placed on a metal plate in a room at a temperature of 15 ° C. and a humidity of 65% RH. Next, on this fiber cushion material is placed a 30cm wide and 30cm wide cotton cloth No. 3 soaked with 10% by weight of water. The state of condensation on the plate surface was evaluated.

(7) Drying The fiber molded body for cushioning material left for 24 hours in an environment of temperature 20 ° C. and humidity 65% is cut into a size of 10 cm in length and 10 cm in width and the weight is measured (A). The fiber cushion material was immersed in water for 1 minute, then placed in a centrifugal dehydrator for 1 minute to drain the water, and the weight was measured (B). Further, the sample was allowed to stand in an atmosphere having a temperature of 20 ° C. and a humidity of 65% RH, and the weight after 1 hour was measured (C). The drying rate was calculated | required with the following formulas using the above measured weight.
Drying rate (%) = (1− (C−A) / (B−A)) × 100

(8) T / H
The fiber cushion material is cut in the thickness direction, and the total number of fibers (0 ° ≦ θ ≦ 45 ° in FIG. 3) arranged in parallel to the thickness direction in the cross section is defined as (T). Fibers arranged perpendicular to the thickness direction of the cushion material (45 ° <θ ≦ 90 ° in FIG. 3)
T / H was calculated with the total number of In addition, the measurement of the number was carried out by observing 30 fibers for each of 10 arbitrary positions with a transmission optical microscope, and counting the number. When T / W was 1.5 or more, it was determined that “fibers are arranged in the thickness direction”.

[Example 1]
An acid component obtained by mixing terephthalic acid and isophthalic acid at 80/20 (mol%) and butylene glycol are polymerized, and the obtained polybutylene terephthalate 38 wt% is further added with polytetramethylene glycol (molecular weight 2000) 62 wt%. A block copolymerized polyether polyester elastomer was obtained by heating reaction. The melting point of this thermoplastic elastomer was 155 ° C. This thermoplastic elastomer is spun into a sheath (sheath), polybutylene terephthalate (melting point 224 ° C.) into the core (core), and the sheath / core weight ratio is spun to 70/70 to obtain an eccentric sheath / core type composite fiber. Obtained. The obtained composite fiber was stretched 2.0 times, dried at 80 ° C. to develop crimps, then applied with an oil agent and cut into 51 mm to obtain heat-adhesive short fibers. In the heat-bondable short fibers, the single yarn fineness was 7.3 dtex, the number of crimps was 13 / 2.54 cm, and the crimp rate was 30%.

Next, 30% by weight of the heat-adhesive short fibers and a polyethylene terephthalate short fiber obtained by a conventional method as an inelastic crimped short fiber (single yarn fineness 7.3 dtex, fiber length 64 mm, number of crimps 9/2. 54 cm, crimp rate 34%, cross-sectional shape is round hollow, melting point 256 ° C.) 70% by weight, a web is produced with a normal carding machine, and a roller surface speed of 2. Folding into an accordion type by pushing into a hot air suction heat treatment machine (heat treatment zone length 5 m, moving speed 1 m / min) with a driving roller of 5 m / min, treated at 190 ° C. for 5 minutes, thickness 30 mm, basis weight 460 g / min A fiber structure in which m ² inelastic crimped short fibers and heat-adhesive short fibers were arranged in the thickness direction of the fiber structure was obtained.

A fiber structure in which four fiber structures and one polyester fiber three-dimensional knitted fabric (trade name Fusion (registered trademark), product number AKE65710, basis weight 430 g / m ² ) are laminated on the uppermost layer is 60 mm between the upper and lower two plates. It was made to compress and hold between and heat-molded. In addition, as shown in FIG. 1, the lower plate is provided with triangular convex portions having a cross section of 30 mm at the bottom and a height of 30 mm in a lattice shape at intervals of 70 mm on the surface on which the fiber structure is placed. Only one surface of the fiber molded body is provided with a V-shaped groove (depth 30 mm, width 30 mm) in a lattice shape (the interval between adjacent V-shaped grooves is 70 mm in both directions) on the surface opposite to the surface. A fiber cushion material in which a fabric (polyester fiber three-dimensional knitted fabric) was laminated was produced.
The obtained fiber cushion material was excellent in cushioning properties, hardly stuffy, had dew condensation suppression properties, and was easy to dry. The evaluation results are shown in Table 1.

  Next, using the fiber cushion material such that the surface on which the V-shaped groove is formed becomes the back surface of the cushion material (that is, the surface opposite to the human body side), the mat material for bedding has a three-dimensional curved surface shape. Furniture cushions and vehicle seat cushions are used and used to provide excellent resilience and cushioning, reduce stuffiness caused by a large amount of perspiration, and suppress the occurrence of condensation due to temperature changes on the back of the cushioning material. It was easy to dry after washing.

[Example 2]
Of the four fiber structures laminated in Example 1, the second and third layers are 30% by weight of the same heat-adhesive short fibers as in Example 1, and 70% by weight of the non-elastic crimped short fibers as in Example 1. And a web is produced with a normal card machine, and the web is overlapped with a normal cross layer. Then, the thickness is regulated, and the weight is pushed into a hot air suction heat treatment machine set at 200 ° C. 460 g / A fiber cushion material was produced in the same manner as in Example 1 except that the fiber structure was changed to m ² .
Although the obtained fiber cushion material was slightly inferior to Example 1 in cushioning properties, it was difficult to stuffy, had dew condensation suppression properties, and was easy to dry. The evaluation results are shown in Table 1.

[Comparative Example 1]
In Example 1, blades having a depth of 15 mm were provided at intervals of 100 mm on the surface of the lower plate where the fiber structure was laminated and heat-molded. A fiber molded body for cushioning material was prepared in the same manner as in Example 1 except that the blade was cut on the surface of the fiber structure.
The obtained fiber molded body for cushion material was inferior to Examples 1 and 2 in cushioning property, dew condensation suppression property, and drying property. The evaluation results are shown in Table 1.

[Example 3]
A fiber cushion material was prepared in the same manner as in Example 1 except that the polyester fiber three-dimensional knitted fabric (trade name Fusion (R), product number AKE65710, basis weight 430 g / m ² ) was not laminated in Example 1.
The obtained fiber cushion material was inferior to Examples 1 and 2 in cushioning property and anti-steaming property. The evaluation results are shown in Table 1.

[Example 4]
One intermediate layer of the fiber structure laminated in Example 1 has a moisture absorption rate of 85% by weight with respect to physiological saline, with a water absorption rate of 45 times its own weight, 20 ° C., and a relative humidity of 80%. 40% by weight of fiber (trade name Beloasis (registered trademark), single fiber fineness 10 dtex, fiber length 51 mm) and 60% by weight of normal polyethylene terephthalate fiber (single fiber fineness 4.4 dtex, fiber length 51 mm) are carded. A polyester woven fabric for skin having a basis weight of 100 g / m ² is placed on both surfaces of a water-absorbing and / or hygroscopic nonwoven fabric having a basis weight of 500 g / m ² and a thickness of 4 mm obtained by applying ordinary treatment by crosslay and needle punch. A fiber cushion material was produced in the same manner as in Example 1 except that it was changed to a water-absorbent and hygroscopic fiber structure obtained by quilting.
The obtained fiber cushion material was inferior to Examples 1 and 2 in cushioning property and drying property. The evaluation results are shown in Table 1.

1: Fiber structure 2: Fabric 3: V-shaped groove 4: V-shaped groove

Claims (9)

  The weight ratio of the inelastic crimped short fiber and the heat-adhesive composite short fiber disposed on the surface of the polymer having a melting point 25 ° C. lower than that of the polymer constituting the inelastic crimped short fiber as a heat-fusible component Adhering point that is blended so as to be 90/10 to 10/90 and heat-sealed in a state where the heat-adhesive composite short fibers cross each other and / or the heat-adhesive composite short fibers and the inelastic crimped short It includes a fiber structure in which fixing points thermally bonded in a state of intersecting with fibers are scattered, and a V-shaped groove is formed on at least one surface of the fiber structure. Fiber cushion material.   The fiber cushion material according to claim 1, wherein V-shaped grooves are formed in a lattice shape on at least one surface of the fiber structure.   In the V-shaped groove, the depth is 20 to 30 mm, the width is 30 to 50 mm, and the interval between adjacent V-shaped grooves is within the range of 50 to 100 mm as the center line interval of the V-shaped grooves. The fiber cushion material according to claim 2, wherein   The fiber cushion material according to any one of claims 1 to 3, wherein the inelastic crimped short fibers or the heat-adhesive composite short fibers are arranged in the thickness direction of the fiber structure.   The fiber cushion material in any one of Claims 1-4 whose said inelastic crimped short fiber is a polyester-type fiber.   The fiber cushion material in any one of Claims 1-5 whose heat-fusion component which comprises the said heat bondable composite staple fiber is a polyester-type elastomer. The fiber cushion material according to any one of claims 1 to 6, wherein the fiber structure has a thickness of 50 to 300 mm and a density within a range of 20 to 50 kg / m ³ .   The fiber cushion material in any one of Claims 1-7 in which the three-dimensional knitted fabric is laminated | stacked on the surface on the opposite side to the surface in which the V-shaped groove is formed in the said fiber structure.   The fiber cushion material according to any one of claims 1 to 8, wherein the fiber cushion material is for bedding, furniture, or a vehicle seat.

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