JP4141901B2 - Applicator with handle and method for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an applicator with a handle, and more particularly to an applicator with a handle that has a specific porous structure in the application part and is particularly suitable for liquid application.
[0002]
[Prior art]
Conventionally, a cotton swab having a sliver wrapped around at least one end of a handle is well known as an applicator with a handle. Further, a pad with a handle in which a part of a molded urethane sponge or polyvinyl alcohol (PVA) sponge is cut and a rod-like body to be a handle is inserted and fixed to the cut is well known. Furthermore, a cosmetic tool is also known in which a base fabric to which electrostatic flocking has been applied is coated on one end of a stick.
[0003]
However, cotton swabs have the disadvantage that lint is generated, urethane sponges are poorly drained after use, and PVA sponges harden when dried, so that they need to be re-swelled with water before use again. A drawback was pointed out. Further, the electrostatically-planted base fabric has a drawback that it hardly contains liquid.
[0004]
On the other hand, as a wiping tool used for application of cosmetics and disinfectants and wiping, it is relatively relative to materials having relatively different liquid absorbency, such as synthetic fiber cotton or polyurethane block having relatively low liquid absorbency. There has been proposed a wiping tool that prevents excessive absorption of liquid by coating a highly absorbent fabric or nonwoven fabric (see Patent Document 1).
However, the wiping tool still contains insufficient liquid, and the manufacturing process is complicated, so that it is not practical.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-85448
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned problems, and its object is to provide a patterned applicator having excellent performance as a liquid applicator having good liquid containment and discharge properties by a simple manufacturing method. There is to do.
[0007]
[Means for Solving the Problems]
An applicator with a handle comprising an application part at the tip of a handle having a hollow part at least at one end, the application part comprising a spherical porous fiber structure comprising a fiber bundle containing 10% by mass or more of adhesive crimped fibers The spherical porous fiber structure is formed by entanglement and fusion of adhesive crimped fibers, and there is a fiber converging region having an apparent density of 0.25 g / cm ³ or more. There is a network structure region having an apparent density of 0.15 g / cm ³ or less outside the fiber converging region, and the fiber bundle is inserted into the hollow portion of the handle, and the area S of the hollow portion of the handle, It is an applicator with a pattern characterized in that the total fineness D of the fiber bundle and the length L of the fiber bundle satisfy the following formulas (1) and (2) .
0.9 × 10/1000 × (D) ^1/2 ≦ 2 (S / π) ^1/2 ≦ 1.4 × 10/1000 × (D) ^1/2 (1)
8 (S / π) ^1/2 ≤ L ≤ 48 (S / π) ^1/2 (2)
D: Total fineness of fiber bundle (dtex)
S: Area of the hollow part of the handle (mm ² )
L: Length of fiber bundle (mm)
[0008]
In the present invention, a fiber bundle containing 10% by mass or more of adhesive crimped fibers is inserted into a hollow portion of a handle having a hollow portion at one end so that the center in the longitudinal direction coincides with the center of the hollow portion of the handle. Then, the coated applicator is impregnated with water, causes crimping of the adhesive crimped fibers to occur while raising the temperature, entangles the fibers, and partially bonds the adhesive components of the adhesive crimped fibers together The handle applicator characterized in that the area S of the hollow portion of the handle, the total fineness D of the fiber bundle, and the length L of the fiber bundle satisfy the following expressions (1) and (2): It is a manufacturing method.
0.9 × 10/1000 × (D) ^1/2 ≦ 2 (S / π) ^1/2 ≦ 1.4 × 10/1000 × (D) ^1/2 (1)
8 (S / π) ^1/2 ≤ L ≤ 48 (S / π) ^1/2 (2)
D: Total fineness of fiber bundle (dtex)
S: Area of the hollow part of the handle (mm ² )
L: Length of fiber bundle (mm)
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The applicator with a handle of the present invention is characterized in that an applicator made of a spherical porous fiber structure is attached to at least one end of the handle.
As a material constituting the handle used in the present invention, various synthetic resins and the like can be used, and examples thereof include polypropylene and polyethylene. Polypropylene which is not affected by hot water is preferable. The shape of the handle is not particularly limited as long as it has a hollow portion at least at one end as will be described later. On the other hand, the portion gripped by the user when the applicator is used may be any shape that does not cause inconvenience when used, and various cross-sectional shapes such as a polygon and a circle can be adopted.
[0010]
Next, the spherical porous fiber structure constituting the application part of the present invention will be described.
Here, the spherical shape referred to in the present invention includes a true sphere, an elliptic sphere, a polyhedron (curved surface) close to a sphere, and the like.
The spherical porous fiber structure includes an adhesive crimped fiber. In the present invention, the adhesive crimped fiber is a self-adhesive or other fiber that is softened with hot water of about 95 to 100 ° C. It is a crimped fiber containing a polymer component that adheres to the fiber. Further, the crimped form of the crimped fiber is a flat zigzag crimp, a three-dimensional crimp by false twisting, a side-by-side type composite fiber, an eccentric core-sheath type composite fiber, an asymmetric cooling fiber, or the like. The three-dimensional crimp is not particularly limited, but is preferably a fiber having a three-dimensional crimp from the viewpoint of bulkiness and flexibility of the porous fiber structure, and particularly a false twist crimp. Fiber is preferably used.
On the other hand, in the case of straight yarn such as raw yarn, the above-mentioned three-dimensional crimp is not obtained, and the bonded portion is not a point but a lump and the texture is hard. Moreover, even if it has adhesiveness, the adhesive crimped fiber from which a crimp lose | disappears by heat processing becomes a result which cannot obtain the effect of this invention, and is unpreferable.
[0011]
The adhesive crimped fiber desirably has a crimp rate of 5% or more, more preferably a fiber having a crimp rate of 10 to 30%. If the crimp rate is less than 5%, a spherical porous fiber structure that is bulky and has good liquid content and good discharge may not be obtained.
[0012]
Examples of the adhesive polymer constituting the adhesive crimped fiber include a copolymer containing nylon 12 or acrylamide as one component, polylactic acid, an ethylene-vinyl alcohol copolymer, and the like. -A vinyl alcohol copolymer is preferably used. As the ethylene-vinyl alcohol copolymer, a copolymer obtained by copolymerizing 10 to 60 mol% of ethylene residues with polyvinyl alcohol is preferable, and a copolymer obtained by copolymerizing 30 to 50 mol% of ethylene residues is particularly preferable. This is preferable. The vinyl alcohol portion preferably has a saponification degree of 95 mol% or more. Due to the large number of ethylene residues, it has a unique property that it has wet heat adhesiveness but is hardly dissolved in hot water. The degree of polymerization is not particularly limited, but is preferably about 400 to 1500.
In the present invention, the ethylene-vinyl alcohol copolymer may be partially crosslinked for post-processing such as fiber modification after the intended porous fiber structure is obtained.
[0013]
The adhesive crimped fiber used in the present invention may be a composite fiber with another thermoplastic polymer, or a fiber in which the surface of a fiber made of another thermoplastic polymer is coated with the polymer. Examples of other thermoplastic polymers include polyesters, polyamides, and polypropylenes. Polyesters and polyamides having a higher melting point than ethylene-vinyl alcohol copolymers in terms of heat resistance, dimensional stability, and the like. Preferably used.
[0014]
Examples of the polyester include terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, α, β- (4-carboxyphenoxy) ethane, 4,4′-dicarboxydiphenyl, and 5-sodium sulfoisophthalic acid. Aromatic dicarboxylic acids, azelaic acid, adipic acid, sebacic acid and other aliphatic dicarboxylic acids or their esters, ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol , Neopentyl glycol, cyclohexane-1,4-dimethanol, polyethylene glycol, polytetramethylene glycol, and other fiber-forming polyesters, and 80 mol% or more of the structural units are ethylene terephthalate units. thing Preferred.
[0015]
Further, examples of the polyamide include nylon 6, nylon 66, and aliphatic polyamide mainly composed of nylon 12, semi-aromatic polyamide, and the like. Polyamide containing a small amount of the third component may be used.
[0016]
In the present invention, when a composite fiber made of an ethylene-vinyl alcohol copolymer and another thermoplastic polymer is used as the fiber constituting the porous fiber structure, the composite ratio is the former: the latter (mass ratio). = 10: 90 to 90:10, particularly 30:70 to 70:30 is preferable from the viewpoint of spinnability. Further, the composite form is not particularly limited, and a conventionally known composite form can be adopted, but it is desirable that the ethylene-vinyl alcohol copolymer is present on at least a part of the fiber surface, and 50% More preferably, it is exposed. Specific examples of the composite form include a core-sheath type, an eccentric core-sheath type, a multi-layer bonding type, a side-by-side type, a random composite type, a radial bonding type, and an ultrafine fiber generation type. The cross-sectional shape of these fibers is not limited to a round cross-section or a solid cross-sectional shape that is a solid cross-sectional shape, and may be various cross-sectional shapes such as a hollow cross-sectional shape.
In particular, when using an ultrafine fiber generating type composite fiber, a spherical porous fiber structure composed of single fibers having a fine fiber single fiber fineness of 0.5 dtex or less is preferable in terms of texture.
[0017]
The spherical porous fiber structure constituting the application part of the present invention needs to contain 10% by mass or more of adhesive crimped fibers. If the crimped fiber is less than 10% by mass, a spherical structure cannot be obtained. In the present invention, it is more preferable to contain 30 to 90% by mass of the adhesive crimped fiber. Even if the adhesive crimped fiber is less than 10% by mass, a spherical structure may be obtained. However, even if the fiber is insufficiently bonded and the liquid is retained, the structure shrinks in volume due to the surface tension of the liquid. As a result, a sufficient amount of liquid cannot be secured. In addition, the feeling of application in the application operation is also important for the user, and the operator performs application while adjusting the application amount. Therefore, if it is less than 10% by mass, it is not preferable in that the above-mentioned coating feeling cannot be obtained.
[0018]
On the other hand, fibers other than the adhesive crimped fibers constituting the porous fiber structure are not particularly limited, and natural fibers, semi-synthetic fibers, and synthetic fibers can be used and can be selected according to the purpose. It is preferable to use fibers, and it is particularly preferable to use polyester fibers. In addition, it is desirable that these fibers also have a crimp equivalent to that of the adhesive crimped fiber, and in particular, containing 10% by mass or more of a crimped fiber other than the adhesive crimped fiber in terms of bulkiness and liquid discharge properties. The amount is particularly preferably 10 to 70% by mass.
[0019]
The spherical porous fiber structure constituting the applicator with a handle of the present invention is characterized in that it is formed by entanglement and fusion of fibers. The porous fiber structure is also characterized by the presence of a network structure region and a fiber focusing region as shown below.
The apparent density of the network structure region constituting the porous fiber structure can be arbitrarily set depending on the amount of adhesive crimped fibers used, the fiber accumulation density, heat treatment conditions, etc., but is 0.15 g / cm ³ or less. It is important to be.
When the apparent density in the network structure region exceeds 0.15 g / cm ³ , the elasticity is low, and the liquid is scattered or the texture becomes hard at the time of applying the liquid. Furthermore, a good coating feeling cannot be obtained. Preferably, it is 0.1 g / cm ³ or less. Moreover, formation of the opening part which becomes a recessed part is also seen in the surface of this porous fiber structure, and when using it as an applicator, the outstanding liquid absorbency is exhibited.
Further, a fiber converging region in which fiber bundles are tightly constrained exists at the center of the fiber structure, and the apparent density is 0.25 g / cm ³ or more, preferably 0.27 to 0.31 g. / Cm ³ . When the present invention is carried out when the apparent density in the fiber converging region is less than 0.25 g / cm ³ , the degree of restraint is low, and a preferable application portion cannot be formed.
[0020]
Hereafter, the structure of the spherical porous fiber structure which comprises the application part of the applicator with a handle of this invention is demonstrated concretely using drawing.
In FIG. 1, the cross-sectional schematic diagram which shows an example of the applicator with a handle of this invention is shown. A coating portion 2 made of a spherical porous fiber structure is provided at the tip of the handle 1. A fiber converging region 3 is present inside the spherical porous fiber structure constituting the applicator, and a network structure region 4 is present outside the fiber converging.
FIG. 2 is an enlarged schematic diagram of the network structure region 4 in the case where 100% by mass of core-sheath type adhesive crimped fiber having an adhesive polymer as a sheath component is used as an example. The adhesive crimped fiber 5 is intricately intertwined, and the fibers are in contact with each other at the fusion part 6 and fused, and the core component 7 of the adhesive crimped fiber 5 is present. Recognize.
[0021]
Below, the manufacturing method of the applicator with a handle of this invention is demonstrated.
The applicator with a handle of the present invention is prepared with a handle having a hollow portion at least at one end, and a fiber bundle containing adhesive crimped fibers in the hollow portion of the handle, the center in the longitudinal direction being the center of the hollow portion of the handle Insert them so as to match, then impregnate in water, develop the crimps of the adhesive crimped fibers while raising the temperature and entangle the fibers, and partially bond the adhesive components of the adhesive crimped fibers together Can be obtained.
That is, when a fiber bundle containing adhesively crimped fibers is inserted into the hollow portion of the handle, and then the fiber bundle attached to the handle is impregnated with water and the temperature is raised, the crimp is about 70 ° C. Begins to form, and the fiber bundle begins to form a spherical mass. Furthermore, the temperature rises and the generation of bubbles starts from about 95 ° C., and the fibers in the fiber mass are entangled by the bubble pressure, and at the same time, the adhesive components of the adhesive crimped fibers are melted and fused by heat. The fibers of other parts are bonded to each other to form a spherical porous fiber structure.
[0022]
The heating required to generate bubbles around or inside the fiber bundle is usually about 100 ° C. at 1 atm. The heating temperature correlates with the fusing temperature of the adhesive fiber under wet heat conditions. The heating temperature is preferably a temperature of the adhesive fiber fusion temperature to the fusion temperature + 10 ° C. The wet heat treatment time can be adjusted by the amount of fiber bundle, the degree of fiber fusion, and the like.
[0023]
After the adhesive fibers are fused, the fiber structure is cooled by a well-known method to fix the structure of the porous fiber structure. Since the fiber structure after the wet heat treatment contains hot water, it is preferably immersed in cold water or cooled by a cold water shower, and cooling by cold air may have low efficiency.
[0024]
As described above, in the present invention, it is important that a hollow portion exists in at least one position of the tip portion of the handle. The hollow portion has a role of gripping and restraining a fiber bundle having a certain fineness and length including the adhesive crimped fibers, and a role of being firmly integrated when the application portion is formed.
[0025]
The shape of the hollow portion may be appropriately set according to the shape of the coating portion after the structure is developed, and is not particularly limited, but is preferably a circle, an ellipse, or a regular polygon.
The size of the hollow portion is also related to the thickness of the fiber bundle to be constrained. That is, in order to constrain the fiber bundle in the hollow portion, the cross-sectional area when the fiber bundle is closely packed and the area of the hollow portion are related.
Furthermore, the center of the fiber bundle having a certain length needs to be constrained by the hollow portion of the handle, but the length from the constrained part to one end of the fiber bundle also affects the shape of the coated part after the structure is expressed. That is, if the length is too long, the desired shape is not exhibited even if heat treatment is performed.
Therefore, since the size of the hollow part of the handle, the fineness and the length of the fiber bundle are related to the expression of the structure of the application part, the structure of the target application part cannot be obtained simply by inserting the fiber bundle. Can not.
[0026]
Hereinafter, the manufacturing method of the applicator with a handle of the present invention will be described more specifically with reference to the drawings.
FIG. 3 is a schematic diagram showing an example of a handle used in the present invention. In FIG. 3, a perfect circular hollow portion 8 is present at the tip of the handle. However, the hollow portion is not limited to a perfect circular shape, and may be a regular polygon such as an ellipse or a regular hexagon. Absent.
[0027]
FIG. 4 is a schematic view showing a state in which a fiber bundle containing adhesive crimped fibers is inserted into the hollow part of the handle, and the fiber bundle 9 is inserted into the hollow part of the handle and is held and restrained. Here, it is important to insert the fiber bundle so that the center in the length direction coincides with the center of the hollow portion.
[0028]
In the present invention, it is important that the total fineness D of the fiber bundle to be inserted into the hollow portion of the handle and the area S of the hollow portion of the handle satisfy the following formula (1).
0.9 × 10/1000 × (D) ^1/2 ≦ 2 (S / π) ^1/2 ≦ 1.4 × 10/1000 × (D) ^1/2 (1)
That is, the diameter 2 (S / π) ^1/2 (mm) when the area S of the hollow portion of the handle is converted into a circular area is within 90 to 140% of 10/1000 × (D) ^1/2. It is necessary to be. In addition, 10/1000 × (D) ^1/2 in the above formula substantially corresponds to the fiber diameter (mm) when the specific gravity of the polyester fiber is calculated as 1.38 g / cm ³ . In the present invention, a spherical porous fiber structure having excellent performance can be obtained by satisfying the above formula (1) even with a mixture of fibers having different specific gravities.
Since the gripping force of the fiber bundle by the hollow portion becomes weak when the circular equivalent diameter of the hollow portion area of the handle exceeds 140% of 10/1000 × (D) ^1/2 , a true spherical or spherical structure is not formed. . On the other hand, when the circular equivalent diameter of the hollow part area is less than 90% of ^10/1000 × (D) ^1/2 , the problem of processability that the fiber bundle itself is difficult to be inserted and the restraint part at the time of structure development are high. Since fusion occurs in the density state, there arises a problem that the texture becomes hard.
[0029]
Furthermore, in the present invention, it is necessary that the length L of the fiber bundle inserted into the hollow portion of the handle satisfies the following formula (2).
8 (S / π) ^1/2 ≤ L ≤ 48 (S / π) ^1/2 (2)
That is, L is within the range of 8 to 48 times the diameter when the hollow portion area of the handle is converted into a circle.
If L is less than 8 times the circle equivalent diameter of the hollow area of the handle, a spherical shape cannot be obtained, and even if it exceeds 48 times, a spherical shape cannot be obtained. That is, as seen in FIG. 5, the fiber bundle does not become spherical, and the spherical porous fiber structure targeted by the present invention cannot be obtained.
[0030]
On the other hand, FIG. 6 is a schematic cross-sectional view of the coated portion of the spherical porous fiber structure after the heat treatment.
Concerning a target surface including a fiber converging region 3 that is densely concentrated by the thickness of the tip of the handle and a net-like structure region 4 in which crimped fibers form a net-like structure with a spread. A state in which the left and right fiber bundles are fused on the target surface to form a spherical shape is shown.
[0031]
The handle-equipped applicator of the present invention can be used as an applicator for cosmetic liquids and disinfectant chemicals by utilizing its porosity. Moreover, the applicator of the present invention is not limited to a liquid and may be used as a powder applicator.
[0032]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this Example. In addition, each physical property value in an Example was calculated | required with the following method.
[0033]
(1) Application part (spherical porous fiber structure) A state where an isobutylene-maleic acid-based copolymer (“KI gel” manufactured by Kuraray Co., Ltd .: average particle diameter of 1 mm) and an application part of mass W are mixed in a 300 cc beaker. Then, the volume V1 (cm ³ ) was measured, and then the volume V0 when the coated part was taken out from the beaker was measured, and the volume V was calculated by the following formula.
V = V1-V0
[0034]
(2) The application part is taken out from the applicator with an apparent density pattern in the fiber focusing area, and only the fiber focusing area is cut out from the porous fiber structure constituting the applicator, and the mass W1 (g) and the volume V2 (cm ³ ). Was calculated by dividing the mass W1 by the volume V2.
Apparent density of the fiber converging region = W1 / V2
[0035]
(3) Apparent density of network structure region It was calculated according to the following formula according to the above (2).
Apparent density of network structure region = (W−W1) / (V−V2)
[0036]
(4) After winding the yarn until it reaches 5500 dtex with a crimping machine, a load of 10 g is hung at the center of the lower end of the cassette, and this cassette is fixed at the top, and a load of 0.009 cN / dtex In the state which applied, the hot water process was performed for 30 minutes at 90 degreeC. Next, after leaving it to stand at room temperature in a no-load state and drying it, a load of 10 g is applied again, and the yarn length after being left for 5 minutes is measured, and this is defined as L1 (mm). Next, a load of 1 kg was applied, the yarn length after being allowed to stand for 30 seconds was measured, and when this was taken as L2 (mm), it was calculated by the following formula.
Crimp rate (%) = {(L2-L1) / L2} × 100
[0037]
(5) Fiber bundle fineness (D)
The total fineness (dtex) of the fiber bundle was calculated.
[0038]
(6) Pattern hollow area (S)
The area S was calculated by the following equation based on the ratio of the mass W1 of the paper to which the hollow shape was transferred and the mass W0 of the paper to which the reference area S0 (1 cm ² ) was transferred.
S = S0 × W1 / W0
[0039]
(7) Fiber bundle length (L)
It was measured in a relaxed state using a measure.
[0040]
(8) After measuring the mass W2 of only the liquid retention amount application part, the liquid retention amount was calculated by the following formula as mass W3 when it was taken out by being immersed in water (density 1 g / cm ³ ) for 30 seconds.
Liquid retention amount (%) = {(W3-W2) / V} × 100
[0041]
Example 1
False twisted yarn of core-sheath type composite fiber (Kuraray "Sophista", 165 dtex / 48 filament) with polyethylene terephthalate as the core component and ethylene-vinyl alcohol copolymer as the sheath component as the adhesive crimped fiber A fiber bundle (diameter: 3.0 mm) of 99000 dtex is prepared by aligning four (crimp rate 14.0%) and five false-twisted yarns of polyethylene terephthalate (165 dtex / 48 filament), and a tip of 3. Insert both ends of the fiber bundle so that the length from the hollow portion is 25 mm, that is, the length L of the fiber bundle is 50 mm, and inserted into a handle having a 3 mm circular hollow portion (S = 8.5 mm ² ). It cut | disconnected, this was immersed in 50 degreeC water, it heated until it became a boiling state, and it processed for 2 minutes in the boiling state. Subsequently, this was taken out and immersed in water at room temperature to fix the form.
Thereby, the spherical application part whose major axis is 37 mm was formed. A large number of pores were formed on the surface of the coating part, and the texture was good.
Note that the resulting spherical porous fibrous structure, apparent density network region of the fiber collecting area and apparent density 0.047 g / cm ³ of 0.266 g / cm ³ was present.
Moreover, the liquid retention amount of the obtained applicator with a handle was 85%.
[0042]
Example 2
The false-twisted yarn of the core-sheath type composite fiber (Kuraray "Sofista", 165 dtex / 48 filament) used in Example 1 as the adhesive crimped fiber was made into a 99000 dtex fiber bundle (diameter: 3.0 mm), with a diameter of 3 .Insert into a handle having a 3 mm circular hollow portion, cut both ends of the fiber bundle so that the length from the hollow portion is 25 mm, and immerse it in 50 ° C. water to bring it to a boiled state. And heated to boiling for 2 minutes. Subsequently, this was taken out and immersed in water at room temperature to fix the form.
Thereby, the spherical application part whose major axis is 40 mm was formed. A large number of pores were formed on the surface of the coating part, and the texture was good.
Incidentally, resulting in spherical fibrous structure, the fiber collecting area and apparent density 0.082 g / cm ³ of network areas of apparent density 0.263 g / cm ³ was present.
Moreover, the liquid retention amount of the obtained applicator was 91%.
[0043]
Comparative Example 1
Example 1 except that 11 crimped polyethylene terephthalate yarns (165 dtex / 48 filament) and one adhesive crimped fiber used in Example 1 were pulled together to form a fiber bundle of 98670 dtex. Although it processed in the same way, the spherical porous fiber structure was not formed and the applicator with a handle of the present invention was not obtained.
[0044]
Comparative Example 2
The treatment was carried out in the same manner as in Example 2 except that a polyethylene terephthalate false twisted yarn (165 dtex / 48 filament) was used instead of the adhesive crimped fiber and a fiber bundle having a total fineness of 99000 dtex was used.
This action apparent density is spherical structure having a network structure area of the fiber collecting area and apparent density 0.057 g / cm ³ of 0.266 g / cm ³ was obtained, the liquid retaining amount is 68% It was not of satisfactory performance.
[0045]
Comparative Example 3
Eleven polyethylene terephthalate false twisted yarns (165 dtex / 48 filaments) and one adhesive crimped fiber (Kuraray "Sophista", 165 dtex / 48 filaments) used in Example 1 were drawn together and rolled into a cassette, 98670 dtex. This was processed in the same manner as in Example 1 except that the fiber bundle was made.
Apparent density structure of a spherical fiber collecting area and apparent density 0.061 g / cm ³ of 0.264 g / cm ³ was formed but the liquid retaining amount was 74%.
[0046]
Comparative Example 4
In Example 1, it processed by carrying out the same operation except having used the handle | pattern (S = 15.9mm < ² >) whose diameter of a hollow part is 4.5 mm.
By this operation, the fiber bundle was merely fused while inflated, and the spherical porous fiber structure intended by the present invention was not obtained.
Incidentally, the apparent density of the fiber collecting area 0.184 g / cm ^3, an apparent density of network regions is 0.055 g / cm ^3, the liquid retaining amount was 79%.
[0047]
Comparative Example 5
In Example 1, the same operation was performed except that a handle (S = 5.3 mm ² ) having a hollow part diameter of 2.6 mm was used, but the fiber bundle was inserted into the hollow part. I couldn't.
[0048]
Comparative Example 6
In Example 1, after the fiber bundle was inserted into the hollow portion of the handle, the same operation was performed except that both ends were cut so that the length L of the fiber bundle was 6 mm.
By this operation, the spherical porous fiber structure intended by the present invention was not obtained, and a very hardened structure was obtained.
[0049]
Comparative Example 7
In Example 1, the fiber bundle was inserted into the hollow portion of the handle, and then processed in the same manner except that both ends were cut so that the length L of the fiber bundle was 40 mm. The structure shown in FIG. The spherical porous fiber structure intended by the present invention was not obtained.
[0050]
【The invention's effect】
ADVANTAGE OF THE INVENTION By this invention, the applicator with a handle | pattern whose application part is a porous fiber structure can be provided as a liquid applicator with the favorable inclusion and discharge property of a liquid.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing an example of an applicator with a handle according to the present invention. FIG. 2 is an enlarged schematic view of a network-like structure region. Fig. 5 is a schematic diagram showing a state in which a fiber bundle containing adhesive crimped fibers is inserted into the hollow part of Fig. 5. Fig. 5 is a schematic cross-sectional view of a structure obtained when the length of the fiber bundle is too long for the scope of the present invention. [Fig. 6] Schematic diagram of the cross section of the coated part of the spherical porous fiber structure after heat treatment
1: Handle 2: Application part 3: Fiber converging area 4: Network structure area 5: Adhesive crimped fiber 6: Fusion part 7: Core component 8: Hollow part 9: Fiber bundle

Claims (6)

An applicator with a handle comprising an application part at the tip of a handle having a hollow part at least at one end, the application part comprising a spherical porous fiber structure comprising a fiber bundle containing 10% by mass or more of adhesive crimped fibers The spherical porous fiber structure is formed by entanglement and fusion of adhesive crimped fibers, and there is a fiber converging region having an apparent density of 0.25 g / cm ³ or more. There is a network structure region having an apparent density of 0.15 g / cm ³ or less outside the fiber converging region, and the fiber bundle is inserted into the hollow portion of the handle, and the area S of the hollow portion of the handle, A coated applicator characterized in that the total fineness D of the fiber bundle and the length L of the fiber bundle satisfy the following formulas (1) and (2) .
0.9 × 10/1000 × (D) ^1/2 ≦ 2 (S / π) ^1/2 ≦ 1.4 × 10/1000 × (D) ^1/2 (1)
8 (S / π) ^1/2 ≤ L ≤ 48 (S / π) ^1/2 (2)
D: Total fineness of fiber bundle (dtex)
S: Area of the hollow part of the handle (mm ² )
L: Length of fiber bundle (mm) The applicator with a handle according to claim 1, wherein the spherical porous fiber structure contains 10% by mass or more of adhesive crimped fibers and 10% by mass or more of crimped fibers. The coated applicator according to claim 1 or 2, wherein the adhesive crimped fiber is a fiber in which an ethylene-vinyl alcohol copolymer is present on at least a part of the fiber surface. The liquid applicator of the spherical porous fiber structure is 80% or more. The liquid application pad which uses the applicator with a handle of any one of Claims 1-4. Insert a fiber bundle containing 10% by mass or more of adhesive crimped fibers into the hollow part of the handle having a hollow part at least at one end so that the center in the longitudinal direction coincides with the center of the hollow part of the handle, and then into water It is a method for producing a coated applicator that impregnates and raises the temperature of an adhesive crimped fiber while raising the temperature, entangles the fibers and partially bonds the adhesive components of the adhesive crimped fiber together. A method for manufacturing a handle applicator, wherein the area S of the hollow portion of the handle, the total fineness D of the fiber bundle, and the length L of the fiber bundle satisfy the following formulas (1) and (2).
0.9 × 10/1000 × (D) ^1/2 ≦ 2 (S / π) ^1/2 ≦ 1.4 × 10/1000 × (D) ^1/2 (1)
8 (S / π) ^1/2 ≤ L ≤ 48 (S / π) ^1/2 (2)
D: Total fineness of fiber bundle (dtex)
S: Area of the hollow part of the handle (mm ² )
L: Length of fiber bundle (mm)

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