JPH06248519A - Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber - Google Patents

Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber

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Publication number
JPH06248519A
JPH06248519A JP3174272A JP17427291A JPH06248519A JP H06248519 A JPH06248519 A JP H06248519A JP 3174272 A JP3174272 A JP 3174272A JP 17427291 A JP17427291 A JP 17427291A JP H06248519 A JPH06248519 A JP H06248519A
Authority
JP
Japan
Prior art keywords
component
fiber
island
sea
finely
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3174272A
Other languages
Japanese (ja)
Inventor
Yosuke Takai
庸輔 高井
Original Assignee
Daiwabo Co Ltd
大和紡績株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daiwabo Co Ltd, 大和紡績株式会社 filed Critical Daiwabo Co Ltd
Priority to JP3174272A priority Critical patent/JPH06248519A/en
Publication of JPH06248519A publication Critical patent/JPH06248519A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain conjugate fibers finely splittable without the need for any solvent by forming specific two kinds of conjugate fiber components from a polyester and a polyamide followed by conducting conjugate spinning. CONSTITUTION:Either polyester or polyamide is set as sea component, the other as island component, and such a polymer alloy as to be <5mum in the diameter of the island component on the fiber surface and 10-90wt.% in the rate of the island component to the sea component is set as the 1st component. And, such a second polymer alloy as to be the very island component in the 1st component or replace the sea component with the island component is set as the 2nd component. For the objective conjugate fibers made up of these 1st and 2nd components, on drawing the undrawn yarns obtained by melt spinning, the resultant drawn yarns are fibrillated with pressurized water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite fiber which can be divided into fine ultrafine fibers and a fiber obtained by dividing the composite fiber.

[0002]

2. Description of the Related Art Heretofore, as a method for obtaining fine denier fiber, a method of utilizing a dividable fiber has been known.
As a method of using the composite fiber, for example, Japanese Patent Publication No. 53-47.
No. 414, Japanese Patent Publication No. 53-47416, Japanese Patent Publication No. 63-1
No. 4098 and JP-A No. 62-133164.

Each of the conjugate fibers disclosed in these documents is a combination of different kinds of polymers as constituent components. For example, it is a composite fiber of a combination of polyester and polyamide, polyester and polyolefin, polyolefin and polyamide and the like.

Fibers of fineness are obtained by a method of arranging them in a fiber cross section by a combination structure of nozzles when spinning these polymers and then dividing the fibers into constituent components by applying an external force by high pressure liquid flow or beating. ing.

[0005]

As described above, in the above-described conventional composite fiber, the polymer of the constituent components is arranged in the fiber cross section due to the structure of the nozzle. Therefore, the larger the number of constituent components, the more complicated the structure of the nozzle becomes, which is expensive. However, it is difficult to obtain ultrafine fibers having a denier of less than 0.1 denier by such a method.

Therefore, ultrafine fibers having a denier of less than 0.1 such as those used for the base fabric of artificial leather are not formed by such mechanical division but by a method of removing the sea component from the components of the sea-island structure with a solvent. It was

However, this method has a problem of complicated operations such as solvent recovery and treatment.

[0008]

In order to solve the above-mentioned problems of the prior art, the present inventors made a composite fiber having a polymer alloy as one constituent, and then divided the composite fiber, and further It has been found that when the sea component of the constituent components is destroyed and the island component is fibrillated, the resulting fiber assembly is more flexible and bulkier than the one using ordinary composite fibers.

It has been found that a combination of polyester and polyamide is preferable as a constituent component of the conjugate fiber of the present invention. The polymer alloy formed by the combination of polyester and polyamide is inferior in fiber formability, but it was found that when the obtained undrawn yarn is drawn, it is fibrillated by pressure water, and the present invention has been completed.

That is, the present invention is a composite fiber composed of polyester and polyamide, one of which is a sea component and the other is an island component, and the diameter of the island component in the fiber cross section is less than 5 μm. A polymer alloy having a ratio of 10 to 90% by weight to the sea component is used as the first component, and the second component is the island component of the first component alone or a polymer alloy of a combination in which the sea component and the island component of the first component are replaced. A composite fiber that can be finely divided.

In the above-mentioned constitution of the present invention, a polymer alloy having nylon-6 as the island component and polyethylene terephthalate as the sea component constituting the composite fiber is used as the first component, and nylon-
It is preferable that 6 is the second component.

In the fiber assembly of the present invention, at least a part of the finely dividable composite fiber is divided into a first component and a second component, and at least a part of the sea component of the first component is destroyed. It is characterized by containing 30% by weight or more of fibrillated fibers in which some of the island components are exposed.

In the polymer alloy of the present invention, the ratio of the island component to the sea component is required to be 10 to 90% by weight. If it is less than 10% by weight, the amount of sea components is too large, and it becomes difficult to fibrillate with pressure water. It is preferably 30 to 70% by weight.

The diameter of the fiber cross section of the island component is 5 μm.
It is less than m. Such an island component can be obtained by finely dispersing the island component in a polymer alloy before spinning by a method described below, and spinning and stretching this.

The arrangement of the first component and the second component in the fiber cross section is such that the first component occupies the fiber surface mainly in FIGS.
Can be a sheath-core type as shown in FIG. 3 or these hollow types as shown in FIG. Furthermore, in the fiber cross sections as shown in FIGS. 4 to 6, at least one component of both components is divided into two or more, each component is adjacent to another component, and all components are part of it. May be a split fiber type in which the fiber is exposed on the fiber surface.

The polyester used in the composite fiber of the present invention is polyethylene terephthalate (PET) or polybutylene terephthalate (PBT). Polyamides are nylon-6 (Ny6), nylon 66 (Ny66), nylon 610 (Ny610), nylon 11 (Ny1).
1), nylon 12 (Ny12) and the like.

Further, as a polyamide, nylon MXD6
Aliphatic-aromatic polyamides represented by (trade name, manufactured by Mitsubishi Gas Chemical Co., Inc.) having a hydrocarbon chain, which is bonded to an aromatic ring via an methylene group with an amide, as a repeating unit can also be used. Of these, the combination of Ny6 and PET is most preferable for economical reasons and the dyeability of the conjugate fiber.

When a polymer alloy is also used as the second component,
The sea component and the island component of the first component are used in reverse, but the second component
In order to improve the fiber moldability of the component, it is preferable to make the island component finer than the first component and disperse it, and further reduce the ratio of the island component.

The diameter of the fiber cross section of the island component is 5 μm
Is less than. If there is an island component of 5 μm or more, fiber molding will cause
This is because it is not preferable. To obtain such fine island components, a compatibilizer is used when blending the polymer. As the compatibilizer, for example, a copolymer of olefin and acrylic acid or its derivative is used. Specifically, the following are exemplified.

(1) A graft copolymer of propylene and maleic anhydride.

(2) Ethylene-methyl acrylate copolymer (EM containing 15 to 35% by weight of methyl acrylate)
A).

(3) Ethylene-methyl acrylate copolymer (EE) containing 15 to 35% by weight of ethyl acrylate
A).

(4) 5 to 15% by weight of acrylic acid, 5 to 15% by weight of methyl acrylate, and 85 to 75 of ethylene
Wt% ethylene-acrylic acid-methyl acrylate terpolymer.

(5) An ionomer in which 15 to 50 mol% of the carboxylic acid of ethylene-methacrylic acid copolymer (EMAA) containing 10 to 20% by weight of methacrylic acid is a zinc or alkali metal salt.

(6) An ionomer of an ethylene-methacrylic acid copolymer containing 10 to 20% by weight of methacrylic acid and acrylic acid in total.

In addition, "Admer" (trade name, manufactured by Mitsui Petrochemical Co., Ltd.), "Modic" (trade name, manufactured by Mitsubishi Petrochemical Co., Ltd.), which are used as adhesives for coextruded multilayer films, are also used. it can. In the acrylic acid-based ethylene copolymer, it is preferable that the side chain carboxylic acid is in the state of an ester or an ionomer type salt in terms of heat resistance.

Since the compatibilizer and the polymer which becomes the island component are kneaded in a molten state in advance, the polymer which becomes the sea component is then mixed in the molten state, and then the composite spinning is carried out. The polymer can be finely dispersed.

The splittable conjugate fiber of the present invention is a fiber of 0.5 to 100 denier drawn at least twice, and its fiber form may be multifilament, staple or short cut fiber for papermaking. It may also be spunbond or meltblown fibers.

In order to divide such a composite fiber into split fibrils, it is preferable to apply a physical impact such as a high-pressure water stream treatment. At this time, it is more convenient to divide the stretched fiber by subjecting it to crimping by a physical folding method such as a stuffing box, or using a batting machine to perform pretreatment for promoting the division. The water pressure after sufficient pretreatment may be 70 to 80 kg / cm 2 or more.

When the above-mentioned pretreatment is not carried out, the water pressure for split fibril formation is 100 kg / cm 2, preferably 15
It is 0 kg / cm 2 or more. However, if the pressure is too high, the fibrillated ultrafine fibers will be torn, so it is preferable to perform pretreatment as much as possible.

The splittable conjugate fiber of the present invention can be used by mixing and mixing with other fibers such as polyester, acrylic, nylon and rayon, or fibrous substances such as pulp and synthetic pulp.

The fiber material may be a woven fabric, a knitted fabric, a felt, or a fiber aggregate such as a non-woven fabric or a paper produced by a dry process or a wet process.

These fiber aggregates contain the conjugate fiber of the present invention in a state of being at least partially divided and fibrillated, and are a structure effective in water retention and heat retention.

Further, the divided components of the composite fiber exhibit a characteristic of wiping off dirt as a fiber having sharp corners.

In order to effectively exert such effects, the fiber assembly of the present invention needs to contain the composite fiber in an amount of 30% by weight or more.

[0036]

The composite fiber of the present invention comprises polyester and polyamide, which are incompatible with each other, as components, and each component is divided by using physical impact force such as high-pressure water to form one component. The island component is exposed by destroying the sea component of the polymer alloy and making it fibrillated.
FIG. 7 shows an example in which the composite fiber of FIG. 1 is fibrillated.

The exposed island component has a fineness of several tens to several hundreds of the original composite fiber, and the non-woven fabric made of such split fibrillated fibers is extremely flexible, and is used as a base fabric. The synthetic leather used can have a soft texture that has never been seen before.

[0038]

【Example】

Examples 1 to 13 and Comparative Examples 1 and 2 A combination of polyamide and polyester shown in Table 1 was melt-spun in a cross-sectional shape in which the first component and the second component were arranged in a windmill shape shown in FIG. The area ratio of both components is 50:50
Then, both components are divided into four by each other.

After spinning in hot water at 80 ° C. or 130
The film was stretched to 2 times or more while being heated in a hot roll at ℃. Then, a fiber treatment agent was impregnated and mechanical crimping was given through a stuffer box, followed by drying for 15 minutes by a net hot air dryer at 110 ° C., and this was cut into 41 mm to form staple fibers.

This staple fiber was made into a web having a basis weight of 100 g / m 2 with a roller card, and this web was made into
The composite fiber was treated with water under pressure of 150 kg / cm 2 for 5 seconds, and the degree of fibrillation and the degree of division of the composite fiber were examined by microscopic observation.

The degree of fibrillation and the degree of division are unified and expressed as a division rate, and the number of fibrillated and divided fibers per 100 conjugate fibers is expressed as a percentage.

The dry strength and elongation of the single fiber was measured at a tensile speed of 300 mm / min.

[0043]

[Table 1]

[Brief description of drawings]

FIG. 1 is a plan view showing a cross-sectional shape of a conjugate fiber according to the present invention.

FIG. 2 is a plan view showing a cross-sectional shape of a conjugate fiber according to the present invention.

FIG. 3 is a plan view showing a cross-sectional shape of a conjugate fiber according to the present invention.

FIG. 4 is a plan view showing a cross-sectional shape of the conjugate fiber according to the present invention.

FIG. 5 is a plan view showing a cross-sectional shape of the conjugate fiber according to the present invention.

FIG. 6 is a plan view showing a cross-sectional shape of the conjugate fiber according to the present invention.

FIG. 7 is a schematic view showing a state in which a composite fiber is divided into fibrils.

[Explanation of symbols]

 1 1st component 2 2nd component 3 Hollow part 4 Island component 5 Sea component

Claims (3)

[Claims]
1. A composite fiber composed of polyester and polyamide, wherein one of them is a sea component and the other is an island component, and the diameter of the island component in the fiber cross section is less than 5 μm, and the island component has a diameter of less than 5 μm. A polymer alloy having a ratio of 10 to 90% by weight is used as a first component, and a second component is a polymer alloy of the island component of the first component alone or a combination of the sea component and the island component of the first component, which are finely divided. Possible composite fiber.
2. The finely dividable composite fiber according to claim 1, wherein a polymer alloy having an island component of nylon-6 and a sea component of polyethylene terephthalate as a first component and nylon-6 as a second component.
3. An island component in which at least a part of the finely divisible composite fiber according to claim 1 is divided into a first component and a second component, and at least a part of the sea component of the first component is destroyed. A fiber assembly containing 30% by weight or more of fibrillated fibers in which a part of is exposed.
JP3174272A 1991-05-20 1991-05-20 Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber Pending JPH06248519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3174272A JPH06248519A (en) 1991-05-20 1991-05-20 Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3174272A JPH06248519A (en) 1991-05-20 1991-05-20 Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber

Publications (1)

Publication Number Publication Date
JPH06248519A true JPH06248519A (en) 1994-09-06

Family

ID=15975757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3174272A Pending JPH06248519A (en) 1991-05-20 1991-05-20 Finely splittable conjugate fiber and fiber assembly comprising fibrillated fiber

Country Status (1)

Country Link
JP (1) JPH06248519A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001607A1 (en) * 1996-07-10 1998-01-15 Kimberly-Clark Worldwide, Inc. Process for producing fine fibers and fabrics thereof
WO2007078203A1 (en) * 2006-01-03 2007-07-12 Norwex Holding As Anti-bacterial micro-fibre and production thereof
WO2007112665A1 (en) * 2006-04-04 2007-10-11 Shenzhen Zhongsheng Fiber Engineering Co., Ltd. A process of producing sea-island composite industrial filaments
JP2008538391A (en) * 2005-03-22 2008-10-23 アクアダイ・ファイバーズ インコーポレイテッド Dyed polyolefin yarn and fiber fabric using the yarn
JP2015215353A (en) * 2010-04-21 2015-12-03 ピュリタン・メディカル・プロダクツ・カンパニー・エルエルシー Collection device and material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001607A1 (en) * 1996-07-10 1998-01-15 Kimberly-Clark Worldwide, Inc. Process for producing fine fibers and fabrics thereof
JP2008538391A (en) * 2005-03-22 2008-10-23 アクアダイ・ファイバーズ インコーポレイテッド Dyed polyolefin yarn and fiber fabric using the yarn
WO2007078203A1 (en) * 2006-01-03 2007-07-12 Norwex Holding As Anti-bacterial micro-fibre and production thereof
WO2007112665A1 (en) * 2006-04-04 2007-10-11 Shenzhen Zhongsheng Fiber Engineering Co., Ltd. A process of producing sea-island composite industrial filaments
JP2015215353A (en) * 2010-04-21 2015-12-03 ピュリタン・メディカル・プロダクツ・カンパニー・エルエルシー Collection device and material

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