JP4665329B2 - Polyester fiber structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a polyester fiber structure excellent in friction fastness.
[0002]
[Prior art]
A fiber structure made of polyester fiber mainly composed of aliphatic polyester with a melting point of 130 ° C or higher has the characteristics of excellent biodegradability, but has the disadvantage of poor friction fastness. It was a problem.
[0003]
[Problems to be solved by the invention]
The present invention solves the problems that occur due to the poor wear of the prior art.
[0004]
[Means for Solving the Problems]
The present invention employs the following means in order to solve such problems.
[0005]
That is, in a fiber structure using a polyester fiber mainly composed of an aliphatic polyester having a melting point of 130 ° C. or higher, it has a melamine resin film and organopolysiloxane and / or polyethylene wax on at least the fiber surface. Is a polyester fiber structure characterized by
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the polyester fiber structure of the present invention, a polyester fiber mainly composed of an aliphatic polyester having a melting point of 130 ° C. or higher is used. Here, “mainly composed of aliphatic polyester” means that 80% by weight or more of the polyester fiber is formed from the aliphatic polyester, and the ratio of the aliphatic polyester is 80% by weight or more. The flexibility and color developability that are the objects of the present invention can be obtained.
[0007]
The aliphatic polyester used in the present invention is not particularly limited as long as the peak temperature of the melting peak obtained by DSC measurement is 130 ° C. or higher, and polylactic acid, poly-3-hydroxypropionate, poly-3-hydroxy Butyrate, poly-3-hydroxybutyrate valerate, and blends and modified products thereof can be used.
[0008]
In order to obtain fibers having good gloss, the refractive index of the aliphatic polyester is desirably 1.50 or less, and more preferably 1.45 or less.
[0009]
In the present invention, examples of the most desirable aliphatic polyester from the viewpoints of a high melting point and a low refractive index include polyesters obtained by polymerizing a monomer composition containing L-lactic acid as a main component. L-lactic acid as a main component means that 60% by weight or more of the constituent components of the monomer composition is composed of L-lactic acid, and is a polyester containing D-lactic acid within a range not exceeding 40% by weight. There may be.
[0010]
The polylactic acid can be produced by using a two-step lactide method in which lactide, which is a cyclic dimer, is first produced from lactic acid as a raw material, and then ring-opening polymerization, and direct dehydration condensation in a solvent using lactic acid as a raw material. A step direct polymerization process is known. The polylactic acid used in the present invention may be obtained by any production method. In the case of a polymer obtained by the lactide method, the cyclic dimer contained in the polymer is vaporized at the time of melt spinning and causes thread spots, so that the cyclic dimer contained in the polymer at a stage before melt spinning. The body content is preferably 0.1% by weight or less. Further, in the case of the direct polymerization method, since there is substantially no problem due to the cyclic dimer, it can be said that it is more preferable from the viewpoint of the yarn-making property.
[0011]
The higher the weight average molecular weight of polylactic acid, the better. Usually, it is at least 50,000, preferably at least 100,000, more preferably 100,000 to 300,000. When the weight average molecular weight is lower than 50,000, the strength properties of the fiber are lowered, which is not preferable.
[0012]
The polylactic acid in the present invention may be a copolymerized polylactic acid obtained by copolymerizing other components having ester forming ability in addition to L-lactic acid and D-lactic acid. The copolymerizable component includes glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, hydroxycarboxylic acids such as 6-hydroxycaproic acid, ethylene glycol, propylene glycol, butanediol, neo Compounds containing a plurality of hydroxyl groups in the molecule such as pentyl glycol, polyethylene glycol, glycerin, pentaerythritol or their derivatives, adipic acid, sebacic acid, fumaric acid, terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid , 5-sodium sulfoisophthalic acid, 5-tetrabutylphosphonium isophthalic acid and the like compounds containing a plurality of carboxylic acid groups in the molecule, or derivatives thereof.
[0013]
In order to reduce the melt viscosity, aliphatic polyester polymers such as polycaprolactone, polybutylene succinate and polyethylene succinate can be used as an internal plasticizer or as an external plasticizer. Furthermore, inorganic fine particles and organic compounds can be added as necessary as a matting agent, deodorant, flame retardant, yarn friction reducing agent, antioxidant and the like.
[0014]
The aliphatic polyester used in the present invention needs to have a melting point of 130 ° C. or higher. When the melting point is lower than 130 ° C., the fusion between the single yarns becomes remarkable during spinning, particularly spinning, and the product quality is remarkably impaired due to the occurrence of poor drawability. The melting point is preferably 150 ° C. or higher, more preferably 160 ° C. or higher. Here, the melting point means the peak temperature of the melting peak obtained by DSC measurement. By using such an aliphatic polyester, a softer texture than that of an aromatic polyester fiber can be obtained. This flexibility is attributed to the fact that the Young's modulus of the aliphatic polyester fiber is lower than that of the aromatic polyester.
[0015]
The cross-sectional shape of the polyester fiber of the present invention may be a round cross section, a triangular cross section, a multi-loval cross section, a flat cross section, a Dharma cross section, an X-type cross section, or any other known irregular cross section, and is not limited at all. . For the purpose of imparting gloss, a non-circular or other irregular section such as a multi-leaf type is preferred, and for the purpose of imparting further flexibility, a flat section is also preferred. When aiming at weight reduction, it is also preferable to use a hollow shape. Further, it may be a composite fiber such as a core-sheath composite, a bimetal composite, a sea-island composite, and a split composite fiber.
[0016]
The polyester fiber of the present invention may be a filament yarn such as false twisted yarn, strong twisted yarn, Taslan processed yarn, thick yarn, mixed yarn, etc. in addition to a normal flat yarn, staple fiber, tow, or Various forms of fibers such as spun yarn may be used.
[0017]
The fiber structure of the present invention includes fabrics such as woven fabrics, knitted fabrics, non-woven fabrics and felts, and any structure or shape may be used.
[0018]
In the aliphatic polyester fiber structure of the present invention, the aliphatic polyester fiber of the present invention may be used alone or in combination with other fibers. In the case of mixing, it is preferable that the mixing ratio of the aliphatic polyester fiber of the present invention is 30% by weight or more, preferably 50% by weight or more in order to obtain the soft texture and color developability intended by the present invention. .
[0019]
In the present invention, the melamine-based resin is a compound based on 2,4,6-triamino-1,3,5 triazine, trimethylol melamine, methylated trimethylol melamine, etc., ethylene urea co-condensation compound, dimethylol urea co Examples thereof include condensation compounds and dimethylolthiourea cocondensation compounds.
[0020]
By squeezing the aqueous solution of these melamine compound monomers into the fiber structure and then uniformly squeezing and wet-heat-treating, the melamine compound monomers penetrate into the fabric and condense into a polymer, and a resin film is formed on the fiber surface. Is formed.
[0021]
As a specific embodiment, a wet heat treatment is performed at a temperature of 95 to 110 ° C. for 1 to 10 minutes after uniformly applying an aqueous solution of 0.01 to 20% by weight, preferably 0.1 to 10% by weight of a melamine compound. A method is mentioned.
[0022]
The resin amount of the coating on the fiber surface of the fiber structure is preferably 0.1% by weight or more, more preferably 1 to 5% by weight. If it is less than 0.1% by weight, the effect is small, and if it exceeds 5%, the texture tends to be hard.
[0023]
The following are mentioned as a catalyst which resinizes a melamine type compound in said wet heat processing. Various organic carboxylic acids including formic acid, acetic acid, oxalic acid and their organic salts such as ammonium, sodium, potassium, etc. and sulfuric acid, persulfuric acid, hydrochloric acid, phosphoric acid, ammonium nitrate, sodium, magnesium, aluminum, zinc, etc. Examples thereof include inorganic salts and double salts thereof. These catalysts are preferably used in the range of 0.01 to 10% by weight (with respect to the treatment liquid).
[0024]
When the treatment liquid used in the present invention is heat-dried and heat-treated, a coating of melamine compound is not sufficiently formed on the fiber surface, the texture is hard, and the wear resistance and washing durability are inferior.
[0025]
In the present invention, it is preferable to have organopolysiloxane and / or polyethylene wax on the surface of the fiber structure coated with the melamine resin.
[0026]
By joining the coated melamine resin and organopolysiloxane and / or polyethylene wax, the washing durability against frictional heat resistance is improved.
[0027]
A wide variety of organopolysiloxanes used in the present invention can be used, but generally dimethylpolysiloxane, methylhydrogenpolysiloxane, amino-modified polysiloxane, epoxy-modified polysiloxane, or those having a phenyl group or an alkoxyl group in the side chain. I can give you.
[0028]
Among these, a high polymerization degree epoxy-modified polysiloxane is particularly excellent in terms of durability.
[0029]
The high-polymerization degree epoxy-modified polysiloxane is generally a silicone oil having a viscosity polymerized to 5000 CS or more and having an ether type or finger ring type epoxy group in the side chain. For example, “High Softer K-350” manufactured by Meisei Chemical Industry Co., Ltd., SF8411 and SF8413 manufactured by Toray Dow Corning Silicone Co., Ltd. are available.
[0030]
The polyethylene wax referred to in the present invention includes non-oxidized type, oxidized type and other modified types of low-density polyethylene wax, medium-density polyethylene wax, high-density polyethylene wax, etc., which differ in molecular weight, melting point, ionicity of emulsion, etc. In particular, high-density polyethylene wax is excellent in terms of durability.
[0031]
The high-density polyethylene wax generally has a density of 0.96 or more, and for example, “Maycatex HP-602A” manufactured by Meisei Chemical Industry Co., Ltd. is available.
[0032]
If the adhesion amount of the organopolysiloxane and polyethylene wax bonded to the fiber surface to the fiber structure is too small, sufficient performance cannot be obtained. On the other hand, if the amount is too large, the fiber structure tends to become unsatisfactory due to increased slimming. Accordingly, the adhesion amount of the organopolysiloxane and polyethylene wax to the fiber structure (the total amount when both components are adhered) is preferably 0.01 to 3% by weight, preferably 0.1 to 1% by weight. Is more preferable.
[0033]
The method of applying the compound of the present invention to the fiber surface is a pad method on the entire fiber surface of a fiber structure coated with a melamine resin or a treatment liquid containing at least one kind of organopolysiloxane and polyethylene wax, It is applied by a spraying method, a single-side coating method or the like, and is subjected to a drying heat treatment at a temperature in the range of 120 to 140 ° C. for 10 seconds to 10 minutes.
[0034]
An antistatic agent, a water repellent, a softening agent, a deodorizing agent, and the like may be appropriately added to these treatment liquids.
[0035]
In general, the present invention treats the entire surface by the pad method, but in a knitted and woven fiber structure in which one side is polyester and the other side is cotton, by applying one side only to the polyester side, the other side has a cotton side. Abrasion resistance can also be improved without impairing water absorption and sweat absorption performance.
[0036]
The present invention prevents or delays fibrillation of the fiber itself due to frictional resistance by forming a coating on the fiber surface with a resin having excellent smoothness on a fiber having low wear properties.
[0037]
Therefore, by improving the wear resistance, the fastness to dry friction, whitening caused by threading, frictional heat meltability, fusion during sewing, and the like are improved.
[0038]
The fiber structure of the present invention is suitable as a member for clothing products such as coats, polo shirts, T-shirts, training pants, slacks, underwear, etc., and bedding cotton, bed covers, pillow covers, curtains, chairs, bags, etc. It can also be used for products for daily life. Further, it may be used in combination with natural fibers such as cotton, silk and wool, or synthetic fibers such as rayon, acetate and tencel.
[0039]
【Example】
Next, the present invention will be described in detail by way of examples. Moreover, the measured value in an Example was obtained with the following method.
<Melting point>
Using a differential scanning calorimeter (DSC-7) manufactured by PerkinElmer Co., Ltd., the temperature was measured at a rate of temperature increase of 15 ° C./min, and the peak temperature of the obtained melting peak was taken as the melting point.
<Refractive index>
Using a polymer hot-pressure film as a sample, the measurement was performed according to the method described in JIS-K7105 using an Abbe refractometer equipped with a prism adjusted to 23 ° C.
<Washing>
Using an automatic inversion swirl type electric washing machine VH-3410 (manufactured by Toshiba Corp.), wash with a strong detergent at 0.2% commercial detergent, temperature 40 ± 2 ° C., bath ratio 1:50 for 5 minutes, and then drain The operation of rinsing for 2 minutes while overflowing was repeated twice, and this was regarded as one washing.
<Dry friction fastness>
JIS L0849 type II (Gakushin type), based on dry friction grade judgment.
Example 1
An L-polylactic acid chip having a refractive index of 1.43 and a melting point of 166 ° C. was dried for 12 hours in a vacuum dryer set at 105 ° C. The dried chips were melted at a melter temperature of 210 ° C. by a pressure melter type spinning machine and spun from a 36-hole die hole at a spinning temperature of 220 ° C.
[0040]
The spun yarn was cooled by a chimney wind at 20 ° C. and 25 m / min, and after applying an oil agent to converge, the yarn was taken up at 3000 m / min to obtain an undrawn yarn (122 dtex-36f).
[0041]
This undrawn yarn was drawn using a hot roller type drawing machine under the conditions of a drawing temperature of 90 ° C., a heat setting temperature of 120 ° C., a draw ratio of 1.45 times, a drawing speed of 800 m / min, and a drawn yarn of 165 dtex-72f. Obtained.
[0042]
Cotton knitted fabric containing 20% of 30th cotton yarn is knitted so that the drawn yarn is mainly on the surface, scouring at 80 ° C. for 20 minutes, and then subjected to dry heat setting at 140 ° C. for 1 minute, Black dyed at 120 ° C. using disperse dye, reduced caustic soda to 1/3 of normal, reduced and washed at 60 ° C. for 20 minutes, and dried.
[0043]
Next, melamine resin (Sumitomo Chemical “Smitex Resin M-3” 80 g / L, ammonium persulfate 3 g / L of treatment solution is padded with 75% pick-up, and immediately a hanging steamer with humidity 100% RH, temperature 105 Passion treatment was performed at ℃ for 3 minutes.
[0044]
Next, it is padded with 20 g / L of epoxy-modified polysiloxane (“High Softer K-350” manufactured by Meisei Chemical Industry), squeezed with 75% pickup, dried at 110 ° C., and then heat treated at 130 ° C. for 90 seconds. It was.
[0045]
As a result of the evaluation of the finish, it was found that the surface with polyester had a dry friction fastness (dyed: 2nd grade, before washing in the present invention: 4th grade, after 10 washings: 4th grade) and a knitted fabric excellent in washing durability. .
(Example 2)
The same knitted fabric as in Example 1 was dyed, reduced and washed and dried in the same manner, followed by the same melamine resin processing, followed by high-density polyethylene wax (Maysei Chemical's “Meikatex HP-602A” 100 g / L, foam processing) Foaming agent (Maisei Chemical "Mai Former F-210" 15g / L treatment liquid is applied to the surface with polyester at 50cc / m ^{2 with} a single-side coating machine, and after drying, heat treatment is performed at 130 ° C for 60 seconds. went.
[0046]
The results of the evaluation of the finish are that the surface with polyester has a fast dry friction fastness (dyeing: Grade 2, before washing the present invention: Grade 4, after washing 10 times: Grade 4-3) and the back side is water-absorbing A knitted fabric that does not impair the properties was obtained.
(Comparative Example 1)
The same knitted fabric as in Example 1 was dyed, reduced and washed and dried in the same manner, immersed in a treatment solution of “Delectol LM-3” manufactured by Meisei Chemical Co., Ltd., 5 g / L, squeezed with a mangle roll, and at 130 ° C. After drying for 3 minutes, heat treatment was performed at 140 ° C. for 1 minute.
[0047]
The evaluation result of the finish antique was inferior to dry friction fastness (before washing: second grade).
[0048]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the polyester-type fiber structure which has the dry friction fastness excellent in durability can be provided.

Claims (3)

In melting point fiber structure obtained by using a polyester fiber composed mainly of 130 ° C. or more aliphatic polyesters, on at least the fiber surface, it has a coating of melamine resin, the entire surface or one surface organopolysiloxane with polyethylene polyester fiber structure at least one substance selected from wax, characterized that you have joined. The polyester fiber structure according to claim 1, wherein the aliphatic polyester has a refractive index of 1.50 or less. The polyester fiber structure according to claim 1 or 2, wherein the aliphatic polyester is a polyester having L-lactic acid as a main component of a polymerization component.