JPH10317229A - Conjugate yarn and fabric using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a conjugate yarn excellent in slide preventing effects, yarn processability and nonwoven fabric processability, comprising a first component composed of a thermoplastic resin and a second component composed of a copolymer rubber containing an α-olefin unit and an ethylene unit. SOLUTION: This sheath-core type conjugate yarn comprises (A) a first component as a core component composed of a thermoplastic resin such as a polypropylene resin and (B) a second component as a sheath component which is a copolymer rubber containing (i) 10-60 wt.% of at least one selected from 3-8C α-olefin units and (ii) 90-40 wt.% of ethylene units.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conjugate fiber having a high anti-slip effect and a fabric using the same, and more particularly, to a non-woven fabric, a table cloth, a flooring of a rug and the like made of a conjugate fiber having a high anti-slip effect. The present invention relates to a nonwoven fabric net used on the side or a rug in which a nonwoven fabric having a high anti-slip effect is integrated.

[0002]

2. Description of the Related Art Conventionally, olefin-based heat-adhesive conjugate fibers have been widely used as pile yarns for carpets, base fabrics, and the like because of their light weight and excellent workability. On the other hand, in recent years, a rug having a high anti-slip effect has been demanded as an added value.

In Japanese Patent No. 2571155, a heat-adhesive conjugate fiber in which an ethylene copolymer composed of an ethylene carboxylic acid-based monomer and ethylene occupies at least a part of the fiber surface is joined by heat fusion after weaving. A heat bonded fabric is disclosed. However, this nonwoven fabric does not satisfy the anti-slip performance required for the present invention because the content of the ethylene carboxylic acid monomer is low. When spinning is performed using an ethylene copolymer in which the content of the ethylene carboxylic acid monomer is higher than 10%, foaming occurs in the fiber at the time of spinning, and the inconvenience of significantly reducing the spinnability occurs. Improvement is difficult.
In addition, since the ethylene copolymer has high adhesiveness to metal, the crimping process for imparting crimp to the fiber has poor passability through a crimping machine. There is a drawback that NEP frequently occurs when passing,
It was not always satisfactory. As described above, a composite fiber having excellent workability and satisfying anti-slip performance and a fabric using the same have not been developed so far.

[0004]

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, as a first component and a second component made of a thermoplastic resin, α-olefin units having 3 to 8 carbon atoms. 10 to 60% by weight and 90 to 40 ethylene units
The present invention has been made based on the knowledge that a composite fiber composed of a copolymer rubber by weight% can solve the above-mentioned problems. As is apparent from the above description, an object of the present invention is to provide a composite fiber excellent in anti-slip performance, and further excellent in fiber processability and non-woven fabric processability, and nonwoven fabric, knitted fabric and rug using the same in view of the present situation. Is to provide.

[0005]

Means for Solving the Problems The present invention provides the following (1) to
The invention according to (8) is provided.

(1) A composite fiber comprising at least two components, wherein the first component is composed of a thermoplastic resin and the second component is selected from (A) α-olefin units having 3 to 8 carbon atoms. At least one selected from 10 to 60% by weight;
(B) A composite fiber comprising a copolymer rubber containing 90 to 40% by weight of an ethylene unit.

(2) The conjugate fiber according to (1), wherein the conjugate fiber is a sheath-core conjugate fiber having a first component as a core component and a second component as a sheath component.

(3) The composite fiber is composed of a first component comprising a polypropylene resin as a core component and at least one kind selected from (A) an α-olefin unit having 3 or 4 carbon atoms as a sheath component, in an amount of 10 to 60% by weight. %, And (B) a sheath-core conjugate fiber comprising the second component comprising a copolymer rubber containing 90 to 40% by weight of an ethylene unit.

(4) The conjugate fiber according to any one of (1) to (3), wherein the conjugate fiber contains 0.1 to 9% by weight of carbon fiber in one component.

(5) 10 to 90% by weight of the first component,
The conjugate fiber according to any one of (1) to (4), wherein the component is 90 to 10% by weight.

(6) A nonwoven fabric using the conjugate fiber according to any one of (1) to (5).

(7) A rug using the nonwoven fabric according to (6).

(8) A knitted or woven fabric using the conjugate fiber according to any one of (1) to (5).

(9) A rug using the knitted fabric according to (8).

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The first component of the conjugate fiber of the present invention is a thermoplastic resin. For example, polyolefins such as polypropylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, binary or ternary copolymers of propylene and other α-olefins, polyamides, polyethylene terephthalate, Polybutylene terephthalate, low melting point polyester obtained by copolymerizing diol and terephthalic acid / isophthalic acid, polyesters such as polyester elastomer, fluororesin, a mixture of the above resins, and other spinnable resins can be exemplified.

The second component which is a heat bonding component of the composite fiber of the present invention
The component comprises (A) at least one selected from α-olefin units having 3 to 8 carbon atoms in an amount of 10 to 60% by weight, and (B)
It is a copolymer rubber containing 90 to 40% by weight of ethylene units. 2 of ethylene and α-olefin (C 3-8)
Binary or ternary copolymer rubber can be particularly preferably used.
For example, ethylene-propylene copolymer rubber (EPR),
Examples thereof include ethylene-butene copolymer rubber (EBR) and ethylene-propylene-butene copolymer rubber. If the proportion of (B) is less than 40% by weight, the anti-slip performance of the present invention is insufficient, and if it is more than 90% by weight, the fiber workability is poor, which is preferable. Absent.

The conjugate fiber of the present invention comprises at least two components (hereinafter, referred to as a first component and a second component). First
The preferable difference in the melting point difference of the resin constituting the second component is different depending on the means for heat bonding. For example, it is preferable that there is a melting point difference of 10 ° C. or more in through-air processing and 5 ° C. or more in hot calender roll processing. Heat treatment can be performed by performing heat treatment at a temperature equal to or higher than the softening point of the low melting point component and equal to or lower than the melting point of the high melting point component of the fiber.

The first and second fibers used in the composite fiber of the present invention
Examples of the combination of components include ethylene-propylene copolymer rubber / polypropylene, ethylene-butene copolymer rubber / ethylene-propylene-butene crystalline copolymer,
Ethylene-butene copolymer rubber / polyethylene terephthalate, ethylene-propylene copolymer rubber / nylon 6
6, ethylene-propylene copolymer rubber / polyethylene terephthalate, mixture of ethylene-butene copolymer rubber and ethylene-butene copolymer rubber / polyethylene terephthalate, mixture of ethylene-butene copolymer rubber and ethylene-propylene copolymer rubber / polyethylene, etc. Can be illustrated.

The conjugate fiber of the present invention may contain carbon fiber in one component, if necessary, in the range of 0.1 to 9% by weight, and the component is mainly exposed on the fiber surface. It is necessary. This is because, when the composite fiber of the present invention is used for a carpet or the like, a function of removing static electricity accumulated in the human body is imparted.If a component containing carbon fiber is not mainly exposed on the surface of the fiber, This is because the static elimination effect cannot be sufficiently exhibited. Further, the addition amount of carbon fiber is preferably 0.1 to 9% by weight, and if the addition amount of carbon fiber is less than 0.1% by weight, sufficient static elimination is not performed.
If the content exceeds 9% by weight, the spinnability is remarkably reduced, which is not preferable.

Examples of the fiber processing used in the present invention include known spinning methods such as a melt spinning method, a spun bond method, and a melt blow method. By these processing methods, multifilaments, monofilaments, staple fibers, and the like can be used.
It can be in the form of tows, webs, non-woven fabrics, knitted fabrics and the like.

The form of the conjugate fiber of the present invention includes a sheath-core type, an eccentric sheath-core type, a parallel type, a deformed sheath-core type, a deformed eccentric sheath-core type, a deformed parallel type, a hollow sheath-core type, a hollow eccentric sheath-core type, Hollow parallel type, multi-layer type with 3 or more layers, hollow multi-layer type, hetero-multi-layer type, sea-island type, etc.
In addition, any structure may be used as long as the low melting point component among the components constituting the first and second components forms at least a part of the fiber surface.

The composite ratio of the first component to the second component of the conjugate fiber of the present invention is 10 to 90% by weight for the first component and 9 for the second component.
0 to 10% by weight, preferably 30 to
70% by weight, 70 to 30% by weight of the second component, more preferably 40 to 60% by weight of the first component and 60 to 60% by weight of the second component.
４０40% by weight. The second component involved in adhesion is 10
If the amount is less than 10% by weight, the tensile strength of the heat-adhesive nonwoven fabric made of the conjugate fiber is insufficient, which is not preferable. However, in this case, the nonwoven fabric processing by a non-heat treatment method such as a needle punching process or a high-pressure water jet method is also used. Thus, the tensile strength can be improved.

The fineness of the composite fiber of the present invention is not particularly limited, and may be an appropriate fineness according to the physical properties of the resin used for the first component and the second component and the use of the fiber.
The fineness is 1 to 100D, preferably 1.5 to 32D, more preferably 1.5 to 18D. If it is less than 1D, the productivity is low, and if it exceeds 100D, inconveniences such as the inability to produce a web with a uniform texture occur.

[0025] The fiber length of the conjugate fiber of the present invention is not particularly limited, and may be an appropriate fiber length according to the nonwoven fabric manufacturing method. For example, it is 3 to 20 mm for a wet machine, 3 to 20 mm for an air lay device by a screen method, and 5 to 20 mm for an air lay device by a picker rotor method.
128 mm is preferable, and 25 to 128 mm is preferable for a card machine.

Examples of the method for forming the composite fiber of the present invention into a web include a card method, an air lay method, and a paper making method.

The obtained web can be formed into a non-woven fabric by a known non-woven fabric processing method such as a through-air method, a hot calender roll method, a needle punch method, an ultrasonic fusion method and a high-pressure water flow method. A plurality may be combined. For example, in the case of performing heat fusion using a heat calender roll, it is preferable to set the thermocompression bonding area ratio to 10 to 30%. When the compression area ratio is less than 10%, the pull-out resistance and the strength of the nonwoven fabric are inferior, and when it exceeds 30%, the volume of the nonwoven fabric becomes small and the hand becomes hard, which is not preferable.

The conjugate fiber of the present invention can be used as a long fiber web obtained by a spun bond method, a melt blow method or the like. This long fiber web can be made into a nonwoven fabric using the above-described nonwoven fabric processing method.

The basis weight of the nonwoven fabric of the present invention is not particularly limited, but is preferably about 10 to 500 g / m ² . About 10 to 100 g / m ² when used as a backing material for rugs, 20 to 20 g / m ² when integrated with carpet by needle punch
00 g / m ² , about 15 when used as a wet nonwoven fabric
~80g / m ² is preferred. The apparent density of the nonwoven fabric is not particularly limited. However, when the nonwoven fabric is integrated with a plurality of nonwoven fabrics, sheets, or the like by hot pressing, it is about 0.017 to 0.017.
0.11 g / cm ³ is preferred. Furthermore, the nonwoven fabric of the present invention is not only used alone, but also laminated with other members,
Can be used for various purposes.

The composite fiber of the present invention can be used as a primary product such as a knitted woven fabric, a nonwoven fabric, or a fiber molded product by blending alone or with another fiber, by blending cotton, blending, blending, knitting, or knitting. In addition, these are processed as required to make rugs such as tatami mats, entrance mats, kitchen mats, bath mats, pieces, tile carpets, electric carpets, carpets such as car floors, and clothing such as skirts and pants. Tray mats, tray sheets, tablecloths, furniture, fittings, figurines, etc. underlays / underlays, freshness preservation sheets for supporting foodstuffs, etc. It is used as a non-slip material for stable sheets, impermeable sheets and the like.

[0031]

EXAMPLES The present invention will be described in more detail below using examples of the present invention, but the present invention is not limited to these examples. Table 1 shows the physical properties of fibers and nonwoven fabrics.
It described in.

The composite fiber used for the nonwoven fabric or the rug of the present invention can be produced, for example, by the following steps.
The resin of the core component and the sheath component is melted, and for example, the number of holes is 1
It is discharged from the composite spinneret of 00 to 350. At this time, the undrawn yarn is cooled by air cooling just below the die. Discharge rate 100-200g / min, take-off speed 40-
By picking up at 1300 m / min, 3D to 400
Prepare an undrawn yarn of D. The undrawn yarn is heated from 60 ° C to 12
The speed between the rolls heated to 0 ° C. is set between 1: 2 and 1: 5, and a drawn yarn of 1D to 100D is produced. After applying a finishing agent to the drawn yarn with a touch roll, the finished yarn is passed through a box-type crimping machine to produce a crimped tow. No crimps per inch
~ 25 peaks are preferred. Since the tow contains about 10% of water, it is dried at 60 ° C. to 80 ° C. using a dryer.
The dried tow is cut into fibers with a fixed fiber length in the range of 3 mm to 128 mm using a press-cut type cutter. Next, using the obtained conjugate fiber, a web is formed using a wet machine, a card machine or an air lay device, and then subjected to a heat treatment with a suction dryer, whereby the intersections of the fibers are heat-sealed. This heat treatment may be performed using a heating device such as a heat calender roll instead of a suction dryer.

The definitions and measuring methods of the crimpability, card passing property, sliding friction resistance and the like in the present embodiment are as follows. (1) Crimpability The crimping process was performed using a box-type crimping machine, and it was visually determined whether or not a problem such as a fiber remaining inside the processing machine occurred. (2) Card Passability The composite fiber obtained from the miniature card machine is flowed, and the state of the web obtained from the card machine, the occurrence of neps, the state of troubles such as the card machine clogging, etc. are observed, and comprehensive observation is performed. (3) Sliding friction resistance Weight (50 g / m ² ), size 12 (cm) × 12
(Cm) cloth is placed on a table on which the sample is placed horizontally, and a weight of 280 (g) and a size of 10 (cm) × 10 (cm) is placed on the sample. Attach a tension meter and pull horizontally to measure the force at which the sample starts to move. It was determined that the larger this value, the greater the sliding friction resistance and the better. (4) Static elimination In a room with a room temperature of 20 ° C. and a humidity of 20% RH, a 2 m × 1 m rug is placed on an insulated polyethylene foam, and a human body walking on the rug with leather shoes (made of cowhide) for 40 steps. Was measured with a Kasuga measuring instrument. The relationship between the static elimination value and the determination is as follows. ：: The human body voltage is less than 3 Kv. Δ: The human body voltage is 3 Kv or more and less than 10 Kv. X: The human body voltage is 10 Kv or more.

Example 1 As the first component, MFR = 15 g / 10 min (JIS K
7210 Polypropylene under condition 14), and ethylene-butene copolymer rubber (manufactured by Sumitomo Chemical Co., Ltd .: Espleno NO377) with MI = 18 g / 10 min (JIS K7210 condition 4) as the second component at a discharge ratio of 6: 4. 1
A 5D undrawn yarn was produced. At the time of spinning, the yarn is cooled by air cooling just below the spinneret. The unstretched yarn was stretched at a speed of 1 to 3 between rolls heated to 60 ° C. to produce a 6D stretched yarn. After applying a finishing agent to the drawn yarn with a touch roll, the yarn was passed through a box-type crimping machine to produce a tow having 14 zigzag crimps per inch. Since this tow contained moisture, it was dried at 70 ° C. using a dryer, and then a composite fiber having a fiber length of 51 mm was produced using a push-cut type cutter. The conjugate fiber is passed through a carding machine to produce a fiber web, and then heat-treated at 100 ° C. for 3 seconds using a suction drier to melt and bond the sheath component ethylene-butene copolymer rubber, and apply a basis weight. 28 g / m ² , specific volume 6
A 3 cm ³ / g nonwoven fabric was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 2 5D undrawn yarn, 2D drawn yarn, dipped in a wet dispersant after drawing, no crimping, no drying, and a fiber length of 5 mm
A sheath-core composite fiber was produced under the same conditions as in Example 1 except that After dispersing the conjugate fiber in water with a tappi paper machine and making paper, it was subjected to a heat treatment at 100 ° C. for 10 seconds using a drier to melt and bond the sheath component ethylene-butene copolymer rubber to a basis weight of 20 g. / M ² and a specific volume of 21 cm ³ / g were prepared. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 3 As the second component, MI = 7 g / 10 min (JIS K72)
10) Using ethylene-propylene copolymer rubber (condition: 4) (Esprene N0416 manufactured by Sumitomo Chemical Co., Ltd.)
A sheath-core composite fiber was produced under the same conditions as in Example 1 except that the discharge ratio was set to 7/3, and the undrawn yarn of 45D and the drawn yarn of 18D were used. After passing the composite fiber through a carding machine to produce a web,
By applying a needle punch, the basis weight is 65 g / m
^2. A needle-punched nonwoven fabric having a specific volume of 23 cm ³ / g was prepared. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 4 As the first component, MFR = 10 g / 10 min (JIS K
7210 Polypropylene of condition 14), ethylene-propylene copolymer rubber (MISU: 4.5 g / 10 min (JIS K7210 condition 4), manufactured by Sumitomo Chemical Co., Ltd .: Esplen V0115) as the second component, and a discharge ratio 5
An undrawn yarn of 250D sheath-core type composite fiber was produced in pairs 5. During spinning, the yarn was cooled by water cooling just below the spinneret. The undrawn yarn was drawn at a speed between rolls heated to 60 ° C. at a ratio of 1: 3, a finish was applied by a touch roll, and after annealing, it was wound up to produce a monofilament. The monofilament was plain-woven with a mesh of 5 mesh using a weaving machine to prepare a net, and then heat-treated at 100 ° C. for 3 seconds using a suction dryer.
Melt the ethylene-butene copolymer rubber of the sheath component,
A net having a basis weight of 105 g / m ² and a specific volume of 45 cm ³ / g was produced. Table 1 shows the properties of the filament and the net.
It writes in.

Example 5 As the first component, MFR = 15 g / 10 min (JIS K
7210 Polypropylene under the condition 14), and ethylene-butene copolymer rubber (manufactured by Sumitomo Chemical Co., Ltd .: Esplen V0115) having MI = 4.5 g / 10 min (JIS K7210 condition 4) as the second component is used. Produced a sheath-core composite fiber under the same conditions as in Example 1. The composite fiber is passed through a carding machine to produce a fiber web,
Next, by performing water jet processing using a high-pressure water flow device, the basis weight is 26 g / m ² and the specific volume is 18 cm ^3.
/ G of nonwoven fabric. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 6 As the second component, MI = 28 g / 10 min (JIS K7)
210 A sheath-core composite fiber was produced under the same conditions as in Example 1 except that the ethylene-octene copolymer rubber of Condition 4) was used, and a nonwoven fabric was produced. The produced nonwoven fabric had a basis weight of 30 g / m ² and a specific volume of 56 cm ³ / g. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 7 As the second component, MI = 18 g / 10 min (JIS K7
210 Condition 4) Ethylene-butene Copolymer Rubber (Esprene N0377 manufactured by Sumitomo Chemical Co., Ltd.) and MI = 5
Using a 5/5 blend of ethylene-propylene copolymer rubber (Esprene 201, manufactured by Sumitomo Chemical Co., Ltd.) of 3 g / 10 min (JIS K7210 condition 4), 45D
Example 1 except that the undrawn yarn of Example 1 and the drawn yarn of 18D were used.
Under the same conditions as above, a sheath-core composite fiber was produced. By heating the composite fiber at 100 ° C. for 3 seconds,
The sheath component was melt-bonded, and the basis weight was 27 g / m ² and the specific volume was 5
A 3 cm ³ / g nonwoven fabric was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 8 As the first component, IV = 0.7 (JIS K7210)
Using polyethylene terephthalate of the condition 14),
D unstretched yarn, stretching at a speed of 1 to 1 between rolls,
A sheath-core composite fiber was produced under the same conditions as in Example 1 except that an 18D undrawn yarn was produced. The sheath component is melt-bonded by heat treatment at 100 ° C. for 3 seconds using the composite fiber, and the basis weight is 35 g / m ² and the specific volume is 65 cm.
^{A 3} / g nonwoven fabric was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 9 Using a parallel-type base, MFR = 15 g as the first component
/ 10 min (JIS K7210 condition 14) polypropylene, MI = 18 g / 10 min (JI
SK7210 The parallel type conjugate fiber was prepared under the same conditions as in Example 1 except that ethylene-butene copolymer rubber (manufactured by Sumitomo Chemical Co., Ltd .: Esplene N0377) under condition 4) was spun at a discharge ratio of 5: 5. Produced. The sheath component was melt-bonded by heat treatment at 100 ° C. for 3 seconds using the composite fiber, and the basis weight was 24 g / m ² and the specific volume was 70 cm ³ /.
g of nonwoven fabric was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Example 10 Carbon fiber (diameter 3 μm, fiber length 0.5 mm) was used as the second component.
20% by weight of low density polyethylene masterbatch
%, And a sheath-core composite fiber was produced under the same conditions as in Example 1 except that 2% by weight was blended in the second component.
By heating the composite fiber at 100 ° C. for 3 seconds, the sheath component was melt-bonded, and the basis weight was 27 g / m 2.
^2. A non-woven fabric having a specific volume of 61 cm ³ / g was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Comparative Example 1 As a second component, MI = 20 g / 10 min (JIS K7)
210 Condition 4) Terpolymer of ethylene-ethyl acrylate-maleic anhydride (Sumitomo Chemical Co., Ltd .:
Bondin HX8140) was used, and a sheath-core composite fiber was produced in the same manner as in Example 1 except that the discharge ratio was 5: 5. The conjugate fiber is passed through a carding machine to produce a fibrous web, which is then dried using a suction dryer.
C. for 3 seconds to melt-bond a terpolymer of ethylene-ethyl acrylate-maleic anhydride as a sheath component, with a basis weight of 29 g / m ² and a specific volume of 58 cm.
^{A 3} / g nonwoven fabric was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.

Comparative Example 2 As the second component, MI = 16 g / 10 min (JIS K7)
210 Example 1 except for using polyethylene of condition 4)
A composite fiber was produced under the same conditions as described above. The conjugate fiber is passed through a carding machine to produce a fiber web, and then heat-treated at 100 ° C. for 3 seconds using a suction drier to melt and bond the sheath component ethylene-butene copolymer rubber, and apply a basis weight. 29 g / m ² , specific volume 58 cm ³ / g
Was produced. Table 1 shows the physical properties and the like of the fiber and the nonwoven fabric.
It writes in.

Example 11 A web in which 6D and 18D polypropylene fibers were blended and the web produced in Example 1 were laminated and joined by needle punch to form a rug. This rug had a large anti-slip effect and was suitable as a rug.

Example 12 The net prepared in Example 4 was laminated on the back surface of a cut pile carpet made of 6D and 18D polypropylene fibers backed with a polyethylene film by heat fusion. This rug had a large anti-slip effect and was suitable as a rug.

[0048]

[Table 1]

[0049]

The composite fiber of the present invention solves the problem of poor spinnability and card passing property by using an ethylene-α-olefin (3 to 8 carbon atoms) copolymer rubber as an adhesive component. It is possible to obtain a nonwoven fabric which is easily formed into a fiber and a nonwoven fabric and has a high anti-slip effect.

Claims (9)

[Claims] 1. A conjugate fiber comprising at least two components, wherein the conjugate fiber has a first component comprising a thermoplastic resin,
The second component is (A) 10 to 60% by weight of at least one selected from α-olefin units having 3 to 8 carbon atoms,
(B) A composite fiber comprising a copolymer rubber containing 90 to 40% by weight of an ethylene unit. 2. The conjugate fiber according to claim 1, wherein the conjugate fiber is a sheath-core conjugate fiber having a first component as a core component and a second component as a sheath component. 3. A composite fiber comprising a first component comprising a polypropylene resin as a core component and at least one selected from (A) α-olefin units having 3 or 4 carbon atoms as a sheath component in an amount of 10 to 60% by weight. And (B) 9 ethylene units
The conjugate fiber according to claim 1 or 2, which is a sheath-core conjugate fiber composed of a second component consisting of a copolymer rubber containing 0 to 40% by weight. 4. The conjugate fiber according to claim 1, wherein the conjugate fiber contains 0.1 to 9% by weight of carbon fiber in one component. 5. The conjugate fiber according to claim 1, wherein the first component comprises 10 to 90% by weight and the second component comprises 90 to 10% by weight. 6. A nonwoven fabric using the composite fiber according to claim 1. 7. A rug using the nonwoven fabric according to claim 6. 8. A knitted fabric using the conjugate fiber according to any one of claims 1 to 5. 9. A rug using the knitted fabric according to claim 8.