JP2002235286A - Hydrophilic polyester fiber wadding for bedding and product using the wadding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide polyester fiber wadding which has a highly durable hydrophilic performance and can retain the hydrophilic performance even after a washing treatment, and to provide bedding, such as quilt, pillow, cushion, sleeping pad, bed pad, or mattress, using the wadding. SOLUTION: In this hydrophilic polyester wadding for bedding polyester wadding is imparted with an aqueous mixture dispersion which contains a polyester polyether block copolymer, is stable at temperature below 35 deg.C, and decomposes the dispersion at temperature of >=35 deg.C to deposit the polyesterpolyether block copolymer, and then thermally treating the coating wadding at temperature of >=35 deg.C to form the hydrophilic surface. And the bedding using the polyester polyether block copolymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber cotton having an improved hydrophilic property and a bedding using the same, and more particularly to a polyester fiber cotton and a bedding which can retain the hydrophilic property even after washing. It is.

[0002]

2. Description of the Related Art Polyesters represented by polyethylene terephthalate have relatively excellent properties.
It is widely used as a variety of household and industrial materials, including clothing materials. Particularly in the field of textiles, it is widely used as a raw material for woven or knitted fabrics and nonwoven fabrics because of its excellent physical and chemical properties and economic efficiency. However, polyester fibers are hydrophobic fibers and have drawbacks such as being easily charged and having no hydrophilicity. Numerous methods have been proposed to improve these drawbacks. A method of obtaining a block copolymer by adding a hydrophilic substance and a specific phosphorus compound during the polymerization of polyester (JP-B-63-12897).
), A method of adding a hydrophilic substance during spinning (JP-A-59
-71676), a method of graft-polymerizing a hydrophilic substance on the fiber surface (Japanese Patent Publication No. 57-386), and a method of treating the fiber with low-temperature plasma (Japanese Patent Application Laid-Open No. 59-4747).
6) A method of adhering an aqueous dispersion of a polyester ether copolymer containing a hydrophilic group to the fiber surface (Japanese Patent Publication No. 45
-10794, JP-A-62-19165) and the like. However, the method of adding a hydrophilic substance or graft polymerization decreases the performance of the polyester fiber,
There are drawbacks such as poor productivity. In addition, the method of attaching an aqueous dispersion of a polyester ether copolymer containing a hydrophilic group to the fiber surface is inferior in durability of the hydrophilic property, and the polyester ether copolymer on the fiber surface drops off when washed, resulting in a hydrophilic property. There are drawbacks such as inability to maintain performance.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polyester fiber cotton which has a higher hydrophilicity durability than conventional methods and can retain the hydrophilicity even after a treatment by washing, and a futon using the same. It is to provide beddings such as pillows, cushions, bedding pads, bed pads, and bedding.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and is as follows. (1) an aqueous solution containing a polyester polyether block copolymer and having a property of being stable at a temperature of less than 35 ° C., and having a property that when heated to 35 ° C. or more, the dispersion is broken and the polyester polyether block copolymer is precipitated; A hydrophilic polyester fiber for bedding, characterized in that the surface was hydrophilized by applying the dispersion mixture and then treating at a temperature of 35 ° C. or higher. (2) The polyester polyether block copolymer, wherein the acid component is an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid or an ester-forming derivative thereof, and the polyether component is a polyoxyalkylene glycol having an average molecular weight of 500 or more or a derivative thereof. Is a copolymer obtained by copolymerizing 5-150% by mass of the polyester component with respect to the polyester component. (3) The polyester polyether block copolymer described in (2) above is used in an amount of 0.05 to 100 parts by mass of the fiber.
The hydrophilic polyester fiber cloth according to (1), wherein the hydrophilic polyester fiber is applied at a ratio of 2.0 parts by mass. (4) The aqueous dispersion mixture contains an anionic surfactant and a cationic surfactant in addition to the polyester polyether block copolymer, and contains a nonionic surfactant and / or a zwitterionic surfactant. The hydrophilic polyester fiber cotton according to any one of (1) to (3), wherein an ion complex is generated by heating to disperse the dispersion. (5) The hydrophilicity according to the cotton ball method after five washings described in the text is not more than 20 seconds (1) to (4).
The hydrophilic polyester fiber cotton described in any of the above. (6) A hanging futon, a pillow, a cushion, a pad, and a bed pad, wherein the hydrophilic polyester fiber cotton according to any one of the above (1) to (5) is used as a padding. (7) A futon, characterized in that a card web using the hydrophilic polyester fiber cotton described in any of the above (1) to (6) is rolled up, and hard cotton is used as a core.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The polyester fiber cotton used in the present invention is preferably a polyester mainly composed of ethylene terephthalate units, more preferably polyethylene terephthalate. Further, terephthalic acid is 50% by mass or more as an acid component, and other than that, isophthalic acid,
A polyester obtained by copolymerizing one or two or more kinds of diphenylsulfonedicarboxylic acid, sodium 3,5-dicarboxybenzenesulfonate, naphthalenedicarboxylic acid and the like is preferable. Further, a polyester obtained by copolymerizing ethylene glycol as a glycol component in an amount of 70% by mass or more and one or more of diethylene glycol, butanediol, cyclohexanedimethanol, neopentyl glycol, and the like is also preferable. If necessary, these polyester fiber cottons may contain a matting agent, a pigment, an antibacterial agent, a fragrance and the like. The cross-sectional shape of these polyester fibers is round, hollow, irregular,
Any shape such as a hollow shape is acceptable.

As the acid component of the polyester polyether block copolymer, terephthalic acid is mainly used. In addition, aromatic dicarboxylic acids, aliphatic dicarboxylic acids,
And their ester-forming derivatives alone or
A mixture of more than one species can be used. In particular,
Isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, 3,5
-Aromatic dicarboxylic acids such as sodium dicarboxybenzenesulfonate, oxalic acid, adipic acid, sebacic acid, azelaic acid, aliphatic dicarboxylic acids such as hexahydroterephthalic acid, and further, dialkyl esters such as dimethyl esters and dimethyl esters thereof; Can be mentioned.

As the glycol component, ethylene glycol, butanediol, pentanediol, hexanediol, cyclohexane dimethanol, neopentyl glycol, diethylene glycol, hydroquinone, etc. can be used alone or in combination of two or more.

Further, as a copolymerization component of polyoxyalkylene glycol and / or a derivative thereof as an ether component, polyoxyalkylene glycol such as polyethylene glycol, polypropylene glycol, random or block copolymer of ethylene oxide and propylene oxide, and polyoxyalkylene glycol, Both ends are hydroxyl groups such as polyoxyalkylene glycol, methoxypolyethylene glycol, phenoxypolyethylene glycol, and sodium sulfophenoxypolyethylene glycol at one end via an ether bond, such as a block copolymer obtained by adding ethylene oxide to tetramethylene glycol. And polyoxyalkylene glycol derivatives blocked. These polyoxyalkylene glycol compounds can be used alone or as a mixture of two or more.

The average molecular weight of the polyoxyalkylene glycol compound is 500 or more, and is 800 to 5000.
Is more preferable. If the average molecular weight is less than 500, sufficient hydrophilicity cannot be obtained. The polyoxyalkylene glycol compound is copolymerized in the range of 5 to 150% by mass, more preferably 40 to 130% by mass. If it is less than 5% by mass, water dispersibility is poor, emulsification and dispersion are difficult, and sufficient hydrophilicity cannot be obtained. 150
% Or more, the affinity with the polyester fiber decreases,
In addition, since the hydrophilicity becomes too good, the durability of the hydrophilicity deteriorates.

In the present invention, the polyester polyether block copolymer is preferably provided in a proportion of 0.05 to 2.0 parts by mass with respect to 100 parts by mass of the fiber. A range of 1.0 part by mass is more preferred. If the proportion of the polyester polyether block copolymer is less than 0.05 part by mass, sufficient hydrophilicity and durability cannot be obtained, and if it is 2.0 parts by mass or more, the adhesiveness of the fiber surface increases. In addition, the process passability at the time of forming the web is deteriorated.

Commercially available modified polyester resins using the above polyester polyether block copolymer include SR-1000 and SR-18 manufactured by Takamatsu Yushi Co., Ltd.
00, SR-6200, SR-5000 and the like.

[0012] The aqueous dispersion mixture to be adhered to the polyester fiber for bedding of the present invention contains an anionic surfactant and a cationic surfactant in addition to the polyester polyether block copolymer, and comprises a nonionic surfactant. And / or contain a zwitterionic surfactant. In general, when an anionic surfactant and a cationic surfactant are mixed, an ion complex is easily formed and precipitates. However, if a predetermined amount of a nonionic surfactant and / or amphoteric surfactant is mixed with at least one of the anionic surfactant and the cationic surfactant before mixing, the mixture is stable in a low temperature region even if both are mixed. And does not produce an ion complex.

[0013] A polyester polyether block copolymer is added to the above mixed solution maintained at 35 ° C or lower, and the mixture is applied to polyester fibers. When the mixture is heated to 35 ° C or higher, the anionic surfactant and the cationic surfactant are converted. An ionic complex is formed, dispersion destruction occurs, and the polyester polyether block copolymer precipitates and firmly adheres to the surface of the polyester fiber, so that a hydrophilic polyester fiber can be obtained. In addition, since the formed ion complex is firmly fixed to both the polyester fiber and the polyester polyether block copolymer, the durability of the obtained hydrophilic property is extremely high. As the anionic surfactant, the cationic surfactant, the nonionic surfactant, and the zwitterionic surfactant, conventionally known surfactants can be used, and one kind or a mixture of two or more kinds can be used.

Examples of the anionic surfactant include carboxylate, sulfonate, sulfate, phosphate and the like. Specific examples include higher fatty acid soap, polyoxyethylene alkyl ether carboxylate, and alkylbenzene sulfonic acid. Examples thereof include sodium, sodium oleamide amide sulfonate, sodium dialkyl sulfosuccinate, higher alcohol sulfate, polyoxyethylene alkyl ether sulfate, alkyl phosphate, and polyoxyethylene alkyl ether phosphate.

Examples of the cationic surfactant include aliphatic amine salts and quaternary ammonium salts, aromatic quaternary ammonium salts, heterocyclic quaternary ammonium salts, and the like. Examples thereof include a quaternary ammonium salt, an alkylpyridium salt, an alkylisoquinolium salt, and a benzethonium salt.

As the nonionic surfactant, there are ether type, ester type, ether ester type, nitrogen-containing type and the like. Specifically, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene Examples thereof include fatty acid esters, polyoxyethylene alkylphenyl ethers, polyhydric alcohol fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, and sucrose fatty acid esters.

Examples of the amphoteric surfactant include betaine type, aminocarboxylate, and imidazoline derivative, and specific examples thereof include alkyldimethylbetaine, alkyldiethylenetriamineacetic acid, and alkylmethylaminocarboxylate. it can. The amount of these surfactants used is appropriately set, but is usually 5 to 5 per polyester polyether block copolymer.
It is 200% by mass, preferably 10 to 100% by mass.

A more specific example of the preparation of the aqueous dispersion mixture is described below, but is not limited thereto. A polyester polyether block copolymer is mixed with at least one of an aqueous dispersion of an anionic surfactant and a cationic surfactant to prepare an aqueous dispersion containing a polyester polyether block copolymer. Further, a nonionic surfactant and / or a zwitterionic surfactant are mixed with at least one of these aqueous dispersions, and immediately before use, the two aqueous dispersions are mixed at 35 ° C.
Hereafter, more preferably, the mixture is stirred at a temperature of 25 ° C. or lower. If necessary, an antibacterial agent, an antioxidant, a preservative, an antistatic agent and the like may be added to the prepared aqueous dispersion mixture.

The aqueous dispersion mixture prepared as described above was mixed with 3
While maintaining the temperature at 5 ° C. or lower, the polyester fiber is adhered to the surface of the polyester fiber at the above ratio. Known methods such as dipping, spraying, and a roller method can be used for the attachment method,
Further, other surfactants or the like may be attached before the aqueous dispersion mixture is attached. The polyester fiber to which the aqueous dispersion mixture has been applied is then heated to 35 ° C. or higher,
More preferably, by heating and drying to a temperature of 50 ° C. or higher, a hydrophilic polyester fiber for bedding can be obtained.

The hydrophilic polyester fiber cotton of the present invention is
0% by mass or more, more preferably 30% by mass or more, can be mixed with other fiber cotton to form a padding, a pillow, a cushion, a pad, a bed pad, or the like. In addition, the hydrophilic polyester fiber of the present invention is mixed with other fibers in an amount of 20% by mass or more, more preferably 30% by mass or more to form a card web, which can be used for the wrapping of a hard-floor futon. When the content of the hydrophilic polyester fiber of the present invention is 20% by mass or less, sufficient hydrophilicity cannot be obtained.

[0021]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to only these examples.

(Preparation of Aqueous Dispersion Mixture) 80% by mass of terephthalic acid and 20% by mass of isophthalic acid as acid components, and ester component 10 of ethylene glycol as glycol component
0 parts by mass and an ether component 70 of polyoxyethylene lauryl phenyl ether (average molecular weight 1100)
Preparing an emulsified dispersion by mixing a polyester polyether block copolymer (a), a lauryl phosphate K salt (b), a sodium dioctyl sulfosuccinate (c), and a polyoxyethylene alkyl ether (d) in which parts by mass are copolymerized I do. On the other hand, a mixed emulsified dispersion of a quaternary ammonium salt of higher fatty acid amide (e) and polyoxyethylene alkylphenyl ether (f) is prepared in advance. These two types of emulsified dispersions were cooled to a temperature of 25 ° C. or lower and then mixed to obtain an aqueous dispersion mixture. Finally, the concentration of (a) is 10% by mass and (a) 100 parts by mass,
(B) 20 parts by mass, (c) 20 parts by mass, (d) 20 parts by mass, (e) 30 parts by mass, and (f) 20 parts by mass. The aqueous dispersion mixture was kept at a temperature of 25 ° C. or lower until it was adhered to the polyester fiber.

(Method of measuring hydrophilicity of staple fibers) 1 g of staple fibers defibrated with a roller card has a diameter of about 8 to
Make a 9cm cotton ball. Pure water was placed in a 500 ml beaker, and the number of seconds from when the cotton ball was gently placed on the surface of the water until it was completely submerged was measured.

(Washing test) A 20 g sample was packed in a 20cm x 20cm side cloth (40% cotton, 40th count, 139 / 2.54cm, 40th count, 73 / 2.54cm) and washed 5 times according to JIS L0217103 method. Carried out. Drying was natural drying in the shade.

(Card Passability) The staple fibers which were roughly defibrated were evaluated according to the following criteria when preparing a web with a roller card having a width of 20 cm (manufactured by Daiwa Kiko Co., Ltd.). ：: Nep is 5 / g or less. 95% or more of the injected cotton can be made into a web. Also, a substantially uniform web can be created. Δ: 5 to 20 neps / g. 85-
95% can be made into a web. In addition, a web can be created although it is not uniform. X: Nep is 20 pieces / g or more. 85% of the injected cotton
Only the following can be made into a web, or since the cotton does not continuously come out, it does not become a web.

(Examples 1-3, Comparative Examples 1-2) Polyethylene terephthalate containing 0.5% by mass of titanium dioxide as a matting agent and having an intrinsic viscosity of 0.610 was spun and stretched by a known method to give a single layer. Yarn fineness 6.6 dtex, hollow ratio 24
% Tow having a round cross section was obtained. The tow was crimped and then heat-treated for 5 minutes in a dryer set at a temperature of 150 ° C., and the tow was cut to obtain a 64 mm hydrophilic polyester staple.

(Comparative Example 3) An aqueous dispersion mixture was used as (b)
Polyester staples were obtained in the same manner as in Example 1 except that the emulsified dispersions of only the surfactants (c) and (d) were used. Table 1 shows the evaluation results of the various types of cotton.

[Table 1]

[0028]

Industrial Applicability According to the present invention, polyester fiber cotton which has high durability of hydrophilic performance and can maintain hydrophilic performance even after treatment by washing, and a futon, a pillow using the same,
Bedding such as cushions, bedding pads, bedding pads, bedding, and the like can be provided economically.

Claims (7)

[Claims] 1. It comprises a polyester polyether block copolymer and is stable at a temperature below 35 ° C.,
After applying an aqueous dispersion mixture having the property of breaking the dispersion and precipitating the polyester polyether block copolymer when heated to 35 ° C. or more, the surface is hydrophilized by treating at a temperature of 35 ° C. or more. A hydrophilic polyester fiber cotton for bedding, characterized in that: 2. The polyester polyether block copolymer according to claim 1, wherein the acid component is an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid or an ester-forming derivative thereof, and the polyether component is a polyoxyalkylene glycol having an average molecular weight of 500 or more. The hydrophilic polyester fiber for bedding according to claim 1, wherein the derivative is copolymerized with the polyester component in an amount of 5 to 150% by mass. 3. The polyester polyether block copolymer according to claim 2, which is used in an amount of 0.1 to 100 parts by mass of the fiber.
The hydrophilic polyester fiber cloth for bedding according to claim 1, wherein the hydrophilic polyester fiber is provided in a proportion of from 0.5 to 2.0 parts by mass. 4. The aqueous dispersion mixture contains an anionic surfactant and a cationic surfactant in addition to the polyester polyether block copolymer, and contains a nonionic surfactant and / or a zwitterionic surfactant. The hydrophilic polyester fiber cotton for bedding according to any one of claims 1 to 3, wherein the hydrophilic polyester fiber contains an ion complex, and the dispersion is destroyed by heating. 5. The hydrophilic polyester fiber cloth for bedding according to claim 1, wherein the hydrophilic property by the cotton ball method after performing the washing five times described in the text is 20 seconds or less. 6. A bedding such as a futon, a pillow, a cushion, a pad and a bed pad, wherein the hydrophilic polyester fiber cotton according to claim 1 is used as a pad. 7. A futon, characterized in that a card web using the hydrophilic polyester fiber cotton according to any one of claims 1 to 6 is wound and a hard core is used as a core.