WO2017047460A1 - 接触冷感用繊維及びそれを用いた繊維製品 - Google Patents
接触冷感用繊維及びそれを用いた繊維製品 Download PDFInfo
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- WO2017047460A1 WO2017047460A1 PCT/JP2016/076234 JP2016076234W WO2017047460A1 WO 2017047460 A1 WO2017047460 A1 WO 2017047460A1 JP 2016076234 W JP2016076234 W JP 2016076234W WO 2017047460 A1 WO2017047460 A1 WO 2017047460A1
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- fiber
- polyacetal copolymer
- group
- polyacetal
- fabric
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/66—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
- C08L59/04—Copolyoxymethylenes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/497—Knitted threads
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/06—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
Definitions
- the present invention relates to a fiber excellent in contact cooling feeling and a fiber product obtained from the fiber.
- Polyacetal is an engineering plastic with excellent mechanical properties, heat resistance, chemical resistance, and electrical characteristics, and is widely used in fields such as electrical machinery, automobiles, machinery, and building materials. In addition, since it can be molded into fibers, it is being used as industrial materials such as brushes and filters that can take advantage of the mechanical strength, heat resistance, and chemical resistance that are the characteristics of polyacetal. (For example, see Patent Documents 1 to 3 and Non-Patent Document 1).
- Examples of the fiber having improved water absorption for the purpose of improving the contact cooling sensation include a fiber made of a resin into which a hydrophilic group such as a carboxyl group or a hydroxyl group is introduced.
- a fiber which improved thermal conductivity the fiber which made the resin which knead
- fabrics using such fibers can theoretically be expected to feel cool to the touch, but when actually subjected to a sensory test by humans, there is almost no change from untreated material, and it is possible to feel the cool feeling of touch. There was no.
- Patent Document 4 discloses a fiber having a contact cooling effect obtained by gripping porous inorganic powder particles encapsulating a water-absorbing polymer to the fiber.
- the fabric made of this fiber has a level of cool contact that can be felt.
- products obtained from polyacetal fibers are mainly industrial and industrial applications that use the properties of polyacetal that are conventionally known, such as mechanical properties, slidability, heat resistance, and chemical resistance.
- Polyacetal fibers that are excellent in contact cooling and can be used for underwear and bed sheets are not known.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fiber having excellent contact cooling feeling that can be processed into a fabric having excellent contact cooling feeling even when used as a fabric. Furthermore, it aims at providing the fiber excellent in quick-drying property and glossiness which can be processed into the fabric excellent also in quick-drying property and glossiness.
- Such fibers are used for clothing such as inner garments (underwear) and outer garments (for example, sportswear) that require a feeling of cold contact, touch, and quick drying, bedding items such as sheets, duvet covers, pillow covers, and interiors such as curtains.
- the present inventors are fibers having a polyacetal copolymer containing a specific amount of oxyalkylene groups on the surface, and are measured according to the JIS L 1096 A method. It has been found that fibers having a heat retention rate of 10% or less in the fabric are excellent in contact cooling feeling. Moreover, it discovered that the said fiber was a fiber excellent in quick-drying property and glossiness, and came to complete this invention.
- the present invention is as follows. ⁇ 1> A fiber having a polyacetal copolymer (X) containing an oxymethylene group and an oxyalkylene group represented by the following general formula (1) on the surface,
- the content of the oxyalkylene group in the polyacetal copolymer (X) is 0.2 to 5.0 mol% with respect to the total of the molar amount of the oxymethylene group and the molar amount of the oxyalkylene group
- JIS L 1096 A fiber for contact cooling sensation which is measured according to the method A and defined by the following mathematical formula [1], wherein the heat retention rate of the fabric made of the fiber is 10% or less.
- R 0 and R 0 ′ each have a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an organic group having an alkyl group having 1 to 8 carbon atoms, a phenyl group, or a phenyl group.
- a plurality of R 0 and R 0 ′ may be the same or different.
- M represents an integer of 2 to 6.
- C is a unit surface area that is dissipated from the hot plate during 2 hours when the fabric containing the fiber is placed on the hot plate set at a temperature of 36 ⁇ 0.5 ° C.
- D represents the amount of heat per unit surface area dissipated from the hot plate during 2 hours when the fabric containing the fiber is not installed on the hot plate set at a temperature of 36 ⁇ 0.5 ° C. Represents the amount of heat.
- ⁇ 4> The fiber according to ⁇ 1> or ⁇ 2>, wherein the fiber having the polyacetal copolymer (X) on the surface is a multilayer fiber obtained by coating a fiber containing a thermoplastic resin with the polyacetal copolymer (X).
- ⁇ 5> The fiber according to ⁇ 1> or ⁇ 2>, wherein the fiber having the polyacetal copolymer (X) on the surface thereof is a composite fiber having the polyacetal copolymer (X) on the surface of a fiber containing a thermoplastic resin.
- thermoplastic resin is selected from a polyacetal homopolymer, a polyacetal copolymer other than the polyacetal copolymer (X), a polyolefin resin, a polylactic acid resin, a nylon resin, a polyester resin, a polyvinyl resin, and an elastomer thereof, or
- the fiber according to ⁇ 4> or ⁇ 5> which is two or more types.
- ⁇ 7> A clothing article using the fiber according to any one of ⁇ 1> to ⁇ 6>.
- ⁇ 8> A bedding using the fiber according to any one of ⁇ 1> to ⁇ 6>.
- ⁇ 9> An interior product using the fiber according to any one of ⁇ 1> to ⁇ 6>.
- ⁇ 10> An automobile interior product using the fiber according to any one of ⁇ 1> to ⁇ 6>.
- the present invention it is possible to provide a fiber that is excellent in cool contact feeling. Moreover, in addition to a feeling of contact cooling, the fiber excellent in quick-drying property and glossiness can be provided. Furthermore, since the fibers of the present invention are excellent in cool contact feeling, quick drying, and glossiness, it is possible to provide textile products such as clothing, bedding, interior products, and automobile interior products that are excellent in texture and touch.
- the present invention provides a fiber having a polyacetal copolymer (X) containing an oxymethylene group and an oxyalkylene group represented by the general formula (1) described later on the surface, the oxyalkylene in the polyacetal copolymer (X)
- the content of the group is 0.2 to 5.0 mol% with respect to the total of the molar amount of the oxymethylene group and the molar amount of the oxyalkylene group, and is measured according to the JIS L 1096 A method.
- the fabric for contact cooling sensation in which the heat retention rate of the fabric comprising the fiber defined in [1] is 10% or less.
- the contact cooling sensation in the present invention is an index of a sensory test as to whether or not it feels cold when touching a fiber, a fabric obtained by processing the fiber, or a textile product.
- the contact cooling sensation fiber of the present invention is excellent in contact cooling sensation. This is because the fabric using the contact cooling sensation fiber of the present invention can experience a sufficient feeling of contact cooling at a sensory level even when used as a fabric. That is, when a clothing product obtained by processing the contact cooling sensation fiber of the present invention is worn, it is possible to give a refreshing sensation to most human beings. Therefore, the fiber product using the contact cooling sensation fiber of the present invention can also experience a sufficient feeling of contact cooling at the sensory level. Further, the contact cooling sensation fiber of the present invention, and the fabric and fiber product obtained by processing the fiber are also excellent in quick-drying and glossiness.
- the fiber for contact cooling sensation according to the present invention is a fiber having on its surface a polyacetal copolymer (X) containing an oxymethylene group and an oxyalkylene group represented by the general formula (1) described later.
- the content of the oxyalkylene group in X) is 0.2 to 5.0 mol% with respect to the total of the molar amount of the oxymethylene group and the molar amount of the oxyalkylene group.
- the fiber of the present invention has the polyacetal copolymer (X) containing the above-mentioned specific amount of oxyalkylene group on the surface.
- the form of the fiber having the polyacetal copolymer (X) on the surface is not particularly limited, but preferably [A] the form of a monolayer fiber of the polyacetal copolymer (X), [B] the surface is coated with the polyacetal copolymer (X) A form of a multilayer fiber, [C] a form of a composite fiber in which the polyacetal copolymer (X) is exposed on the surface of the fiber containing the thermoplastic resin.
- the form of the single layer fiber of [A] polyacetal copolymer (X) described above is a fiber made of polyacetal copolymer (X).
- the single-layer fiber is obtained by melt spinning the polyacetal copolymer (X), and can be obtained by further stretching as necessary.
- thermoplastic resin As the core part in the form of the multilayer fiber whose [B] surface is coated with the polyacetal copolymer (X), a fiber containing a thermoplastic resin can be used.
- the type of the thermoplastic resin is not particularly limited.
- the polyacetal copolymer other than the polyacetal homopolymer and the polyacetal copolymer (X) for example, the content of the oxyalkylene group represented by the general formula (1) is an oxymethylene group.
- polyacetal copolymer exceeding 5 mol% with respect to the total of the molar amount of oxyalkylene group and the molar amount of oxyalkylene group), polyolefin resin, polylactic acid resin, nylon resin, polyester resin, polyvinyl resin, and elastomers thereof.
- thermoplastic resins can be used singly or in a combination of two or more.
- the “coating” as used in the present invention refers to a form in which all or a part of the surface parallel to the fiber direction of the core fiber is covered. The ratio of the coating on the surface is not particularly limited, but a higher ratio is preferable because a feeling of cool contact is excellent.
- Such a multilayer fiber can be obtained by melt spinning the polyacetal copolymer (X) and the above-described thermoplastic resin, and can be obtained by further stretching as necessary.
- the form of the obtained multilayer fiber becomes a core-sheath structure in which the polyacetal copolymer (X) covers all or part of the periphery of the thermoplastic resin fiber that is the core fiber.
- thermoplastic resin in the form of the composite fiber in which the polyacetal copolymer (X) is exposed on the surface of the fiber containing the thermoplastic resin is not particularly limited, and the thermoplastic resin in the form of the multilayer fiber described above. The same can be used. These thermoplastic resins can be used singly or in a combination of two or more.
- the composite fiber in which the polyacetal copolymer (X) is exposed on the surface of the fiber containing the thermoplastic resin is obtained by melt spinning the mixture of the polyacetal copolymer (X) and the above-mentioned thermoplastic resin, and further stretched as necessary. It can be obtained by processing.
- the form of the obtained composite fiber may be in a state in which the polyacetal copolymer (X) is compatible with the thermoplastic resin, in a sea-island structure or in a dispersed state derived therefrom, like side-by-side.
- the polyacetal copolymer (X) and the thermoplastic resin may be present on the surface.
- the exposure ratio of the polyacetal copolymer (X) on the surface of the composite fiber is not particularly limited, but a higher ratio is preferable because a feeling of contact cooling is excellent.
- the fiber having the polyacetal copolymer (X) of the present invention on the surface is preferably a fiber having a molecular chain orientation degree of 60% or more, and a fiber having an orientation degree of 70% or more, among the fibers of the above-described form.
- a fiber having an orientation degree of 80% or more are more preferable, and fibers having an orientation degree of 90% or more are particularly preferable. This is because the higher the degree of orientation, the better the feeling of contact cooling.
- the upper limit of the degree of orientation is usually 100% because it is not limited from the viewpoint of contact cooling, but the degree of orientation is preferably 95% or less from the viewpoint of ease of production.
- the contact cooling sensation of the fiber of the present invention is affected by the oxyalkylene group content of the polyacetal copolymer (X) and the orientation degree of the molecular chain of the polyacetal copolymer (X).
- the degree of orientation described above is appropriately selected in consideration of the degree of contact cooling sensation imparted to the fiber product and the oxyalkylene group content of the polyacetal copolymer (X).
- the polyacetal copolymer (X) having a high oxyalkylene group content tends to have a low contact cooling sensation, but the polyacetal copolymer (X) having a higher oxyalkylene group content has a greater influence of the orientation degree on the contact cooling sensation. Therefore, it is possible to improve the cool feeling of contact by increasing the degree of orientation.
- the orientation degree of the fiber having the polyacetal copolymer (X) of the present invention on the surface can be determined using a wide-angle X-ray diffractometer as described in Examples of the present specification.
- the single fiber fineness of the fiber having the polyacetal copolymer (X) of the present invention on the surface is not particularly limited because the allowable value varies depending on the application, but it is used by processing into a fiber product such as a fabric that comes into contact with the skin. In this case, in order not to impair the texture and the touch, it is preferably 10 dtex (unit: decitex) or less, more preferably 5 dtex or less, and further preferably 2.5 dtex or less.
- the fiber having the polyacetal copolymer (X) of the present invention on its surface can be produced according to a conventionally known fiber production method.
- it can be produced by melt spinning a pellet of polyacetal copolymer (X).
- the melt-spun fiber is preferably further drawn.
- the stretching process can also be performed by a conventionally known method and conditions.
- the draw ratio is preferably 3 times or more from the viewpoint of the degree of orientation.
- the upper limit of the draw ratio is not limited in terms of the degree of orientation, but is 15 times from the viewpoint of stability during production (prevention of yarn breakage) and prevention of excessive fibrillation.
- the melt spinning and stretching apparatus can be performed using a conventionally known apparatus.
- the cross-sectional shape of the fiber having the polyacetal copolymer (X) of the present invention on the surface can be variously designed depending on the shape of the nozzle cap at the time of melt spinning, but is not particularly limited and is a simple circular shape. May have an irregular cross section. Especially, a contact cold feeling can be further heightened by setting it as an irregular cross section.
- the polyacetal copolymer (X) in the fiber having the polyacetal copolymer (X) of the present invention on the surface has a structure represented by the following general formula (1) in addition to the oxymethylene group (—CH 2 —O—) in the molecule.
- R 0 and R 0 ′ are each a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an organic group having an alkyl group having 1 to 8 carbon atoms, a phenyl group, or an organic group having a phenyl group Represents a group.
- a plurality of R 0 and R 0 ′ may be the same or different.
- M represents an integer of 2 to 6.
- Examples of the alkyl group having 1 to 8 carbon atoms include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, and cyclohexyl group.
- Examples of the organic group having an alkyl group having 1 to 8 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, and a butoxy group.
- Examples of the organic group having a phenyl group include a benzyl group and a phenethyl group.
- an oxyethylene group, an oxypropylene group, and an oxybutylene group are preferable, and an oxyethylene group is particularly preferable.
- the above-mentioned oxyalkylene group may be contained in the polyacetal copolymer (X) by one type or two or more types. That is, the polyacetal copolymer (X) of the present invention includes not only a binary copolymer but also a multi-component copolymer.
- the polyacetal copolymer (X) in the present invention may be a polyacetal copolymer further having a block structure other than an oxymethylene group or an oxyalkylene group, or may be a polyacetal copolymer further having a branched structure in the molecule.
- these polyacetal copolymers for example, the structure of the chain transfer agent at the terminal obtained by using a thermoplastic resin or oligomer having a functional group having an active hydrogen such as a hydroxyl group in the molecular terminal or in the molecule as the chain transfer agent.
- the polyacetal copolymer (X) in the present invention may be produced by using an epoxy compound such as glycidyl ether or allyl ether as a termonomer, and has a structure derived from these compounds in the polyacetal copolymer. Some are included.
- the content of oxyalkylene groups in the polyacetal copolymer is in a wide range of 0.01 to 20 mol%, but the content of oxyalkylene groups in the polyacetal copolymer (X) in the present invention is (Mole amount of oxyalkylene group) is 0.2 to 5.0 mol%, particularly preferably 0.2 to 4.0 mol%, based on the total amount of oxymethylene group and oxyalkylene group. It is. When the content of the oxyalkylene group is 0.2 mol% or more and 5.0 mol% or less, the feeling of contact cooling is excellent.
- the contact cooling feeling is particularly excellent.
- the contact cooling sensation when the fiber of the present invention is used as a fabric is influenced by the oxyalkylene group content in the polyacetal copolymer (X) and the degree of orientation of the fiber, and therefore in the polyacetal copolymer (X).
- the oxyalkylene group content is appropriately set in accordance with the required use within the above-mentioned range together with the degree of orientation.
- a fiber having a lower oxyalkylene group content in the polyacetal copolymer (X) and a higher degree of molecular chain orientation is superior in contact cooling feeling.
- the polyacetal copolymer (X) in the present invention may be used alone or in combination of two or more polyacetal copolymers having different oxyalkylene group types, and the polyacetal copolymer having different oxyalkylene group contents. May be used in combination of two or more. When two or more types of polyacetal copolymers having different types of oxyalkylene groups or different oxyalkylene group contents are used in combination, these polyacetal copolymers may be in a compatible state, and the sea-island structure or a dispersed state derived therefrom It may be in a state of being side by side.
- Polyacetal copolymer of the present invention is preferably MVR in conformity with ISO1133 (Melt Volume Rate) is less than 100 cm 3/10 min, more preferably at most 80 cm 3/10 min, 60cm 3/10 It is particularly preferred that it be less than or equal to minutes. While suitable for obtaining thin fibers in a melt-spinning as the MVR value is larger, equal to or less than 100 cm 3/10 min, fiber excellent can be obtained in the mechanical properties (especially toughness).
- the lower limit of the MVR value is not particularly limited, but the smaller the MVR value, the higher the melt viscosity in melt spinning, and it becomes difficult to follow the deformation, so that it tends to be difficult to obtain thin fibers efficiently. is there. Therefore, the lower limit of the MVR value is preferably 3 cm 3/10 min, more preferably not less than 8 cm 3/10 min in order to obtain a finer fibers.
- the production method of the polyacetal copolymer (X) in the present invention is arbitrary, and may be produced by any conventionally known method.
- an oxymethylene group such as formaldehyde trimer (trioxane) or tetramer (tetraoxane) is used.
- a cyclic acetal containing an oxyalkylene group having 2 to 4 carbon atoms such as ethylene oxide, 1,3-dioxolane, 1,3,6-trioxocane, 1,3-dioxepane, and the like.
- the polyacetal copolymer (X) of the present invention is preferably a copolymer of a cyclic acetal such as trioxane or tetraoxane and ethylene oxide or 1,3-dioxolane, and in particular, a copolymer of trioxane and 1,3-dioxolane.
- a polymer is particularly preferred.
- the polyacetal copolymer (X) according to the present invention is a method in which a cyclic acetal of an oxymethylene group and a cyclic acetal containing an oxyalkylene group having 2 to 4 carbon atoms, which is a comonomer, are bulk-polymerized using a polymerization catalyst.
- a reaction terminator may be used as necessary for the deactivation treatment of the polymerization catalyst and the polymerization growth terminal.
- the type and amount of the polymerization catalyst, reaction terminator, and molecular weight regulator that can be used in the production of the polyacetal copolymer (X) of the present invention are not particularly limited as long as the effects of the present invention are not impaired. Any known polymerization catalyst, reaction terminator, and molecular weight regulator can be appropriately used.
- the polymerization catalyst is not particularly limited, and examples thereof include boron trifluoride, tin tetrachloride, titanium tetrachloride, phosphorus pentachloride, phosphorus pentafluoride, arsenic pentafluoride, and antimony pentafluoride.
- Examples thereof include Lewis acids, and complex compounds or salt compounds of these Lewis acids.
- Protonic acids such as trifluoromethanesulfonic acid and perchloric acid
- Protic acid esters such as perchloric acid and lower aliphatic alcohol ester
- Protic acid anhydrides such as mixed anhydride of perchloric acid and lower aliphatic carboxylic acid And so on.
- triethyloxonium hexafluorophosphate triphenylmethylhexafluoroarsenate, acetylhexafluoroborate, heteropolyacid or acid salt thereof, isopolyacid or acid salt thereof, perfluoroalkylsulfonic acid or acid salt thereof, etc.
- compounds containing boron trifluoride are preferable, and boron trifluoride diethyl etherate and boron trifluoride dibutyl etherate, which are coordination complexes with ethers, are particularly preferable.
- the amount of the polymerization catalyst used is not particularly limited, but is usually 1.0 ⁇ 10 ⁇ 8 to 2.0 ⁇ 10 ⁇ 3 mol with respect to 1 mol of the total monomer of trioxane and comonomer, preferably Is in the range of 5.0 ⁇ 10 ⁇ 8 to 8.0 ⁇ 10 ⁇ 4 mol, particularly preferably 5.0 ⁇ 10 ⁇ 8 to 1.0 ⁇ 10 ⁇ 4 mol.
- the reaction terminator is not particularly limited, and examples thereof include trivalent organic phosphorus compounds, amine compounds, alkali metal or alkaline earth metal hydroxides. These reaction terminators can be used individually by 1 type or in combination of 2 or more types. Of these, trivalent organic phosphorus compounds, tertiary amines, and hindered amines are preferable.
- the amount of the reaction terminator used is not particularly limited as long as it is sufficient to deactivate the polymerization catalyst.
- the molar ratio with respect to the polymerization catalyst is usually 1.0 ⁇ 10 ⁇ 1 to 1.0 ⁇ 10 10. 1 range.
- the molecular weight regulator is not particularly limited, and examples thereof include methylal, methoxymethylal, dimethoxymethylal, trimethoxymethylal, oxymethylene di-n-butyl ether and the like. Of these, methylal is preferable.
- the amount of these molecular weight regulators used is appropriately determined according to the target molecular weight. Usually, the addition amount is adjusted in the range of 0 to 0.1% by mass with respect to the total monomers.
- the polyacetal copolymer (X) in the present invention includes hindered phenol compounds, hindered amine compounds, amino-substituted triazine compounds, phosphorus stabilizers, alkalis within the range not impairing the object of the present invention.
- Metal-containing compounds represented by the group consisting of metal and alkaline earth metal hydroxides, fatty acid salts, inorganic acid salts, or alkoxides can be added.
- hindered amine compound hindered amine compound, amino-substituted triazine compound, phosphorus stabilizer, alkali metal and alkaline earth metal hydroxide, fatty acid salt, inorganic acid salt, or alkoxide.
- metal-containing compound represented by the group may be referred to as “optional component”.
- a conventionally well-known thing can be used as these arbitrary components.
- the polyacetal copolymer (X) in the present invention includes a stabilizer, a nucleating agent, as necessary, in addition to the optional components described above, within a range not impairing the object of the present invention.
- a stabilizer such as release agents, fillers, pigments, dyes, lubricants, plasticizers, antistatic agents, oils, sizing agents, sizing agents, UV absorbers, flame retardants, flame retardant aids, and other thermoplastic resins
- an elastomer or the like may be added as appropriate.
- stabilizer nucleating agent, release agent, filler, pigment, dye, lubricant, plasticizer, antistatic agent, oil agent, sizing agent, ultraviolet absorber, flame retardant, difficulty
- additive such as a fuel aid, other resins, elastomers
- other components such as “other components”.
- fillers mineral fillers such as glass flakes, glass beads, wollastonite, mica, talc, boron nitride, calcium carbonate, kaolin, silicon dioxide, clay, silica, diatomaceous earth, graphite, molybdenum disulfide, Carbon black, a pigment, etc. can be mentioned.
- the method for adding the above-mentioned optional components and other components to the polyacetal copolymer (X) is not particularly limited.
- the above-described polyacetal copolymer (X) and optional components added as necessary and / or Or it can manufacture by mixing and kneading
- the conditions such as mixing and kneading temperature and pressure may be appropriately selected according to a conventionally known method for producing a polyacetal copolymer.
- the kneading may be performed at a temperature equal to or higher than the melting temperature of the polyacetal copolymer, and is usually preferably performed at 180 ° C. or higher and 260 ° C. or lower.
- An apparatus for producing the polyacetal copolymer is not particularly limited, and a mixing and kneading apparatus conventionally used for producing this kind of polyacetal copolymer can be used.
- the contact cooling sensation in the present invention has a correlation with the heat retention rate determined according to the JIS L 1096 A method (constant temperature method).
- the heat retention rate tends to show a high value by having an air layer inside the fiber that makes it difficult to transfer heat.
- cotton has a feature that the center of the fiber is hollow and thus has a low thermal conductivity and is difficult to release heat.
- the heat retention rate is as high as 20 to 30%. That is, the lower the heat retention rate, the better the feeling of cool contact.
- the contact cooling sensation fiber of the present invention is measured according to the JIS L 1096 A method and has a heat retention rate (%) of 10% or less when formed into a fabric, which is defined by the following mathematical formula [1].
- the fabric here should just be a form of a woven fabric, a knitted fabric, and a nonwoven fabric, and the weaving method and manufacturing method are not specifically limited.
- C is dissipated from the hot plate during 2 hours when the fabric containing the fiber is placed on the hot plate (aluminum alloy plate) set at a temperature of 36 ⁇ 0.5 ° C. Represents the amount of heat per unit surface area (unit: J / cm 2 ).
- D is the amount per unit surface area that is dissipated from the hot plate during 2 hours when the fabric containing the fiber is not placed on the hot plate (aluminum alloy plate) set at a temperature of 36 ⁇ 0.5 ° C. It represents the amount of heat (unit: J / cm 2 ).
- the heat retention rate is more preferably 9% or less, and particularly preferably 7% or less. If the said heat retention rate is 10% or less, it is excellent in a contact cold feeling.
- the lower limit of the heat retention rate is 0% because it is not limited from the point of contact cooling feeling.
- the heat retention rate can be measured by the method described in the examples.
- the heat retention rate tends to decrease as the content of the oxyalkylene group in the polyacetal copolymer (X) decreases.
- the content of the oxyalkylene group in the polyacetal copolymer (X) in the fiber of the present invention is preferably 5 mol% or less, particularly preferably 4 mol% or less.
- the heat retention rate tends to be better as the degree of orientation of the molecular chain of the polyacetal copolymer (X) is higher.
- the degree of orientation is preferably 60% or more, more preferably 70% or more, further preferably 80% or more, and particularly preferably 90% or more.
- the quick drying property of the fiber in the present invention is an index representing the property that the moisture-containing fiber dries quickly, and the fiber that dries faster than the polyester (PET) fiber, which is generally known to be excellent in quick drying property, is an underwear or It is preferable because it gives a refreshing feeling and is more likely to feel a cool feeling of touch as an application that comes into contact with human skin like bedding. This is thought to be due to the removal of latent heat when moisture absorbed by the fibers from the skin evaporates.
- the quick drying property can be measured by the method described in Examples. When the drying rate of the fiber made of PET fiber is defined as the standard (1.0), 0.9 or less is preferable, and 0.8 or less is more preferable.
- the quick drying property tends to be more excellent as the content of the oxyalkylene group in the polyacetal copolymer (X) is smaller.
- the content of the oxyalkylene group in the polyacetal copolymer (X) in the fiber of the present invention is preferably 5 mol% or less, particularly preferably 2 mol% or less.
- quick drying tends to be more excellent as the degree of orientation of the molecular chain of the polyacetal copolymer (X) is higher.
- the degree of orientation is preferably 60% or more, more preferably 70% or more, still more preferably 80% or more, and particularly preferably 90% or more.
- the glossiness of the fiber in the present invention is an index representing the degree of shine when the surface of the fiber receives light, and the larger the value, the smoother the surface and the higher the gloss. Glossiness can be measured by the method of measuring the reflectance of visible light described in the examples. When the glossiness of the PET fiber is taken as a reference (1.0), 1.1 or more is preferable, and 1.2 or more is more preferable. The gloss tends to be good if the content of the oxyalkylene group in the polyacetal copolymer (X) is 5 mol% or less, so the content of the oxyalkylene group in the polyacetal copolymer (X) in the fiber of the present invention is 5 mol. % Or less is preferable.
- the fiber product obtained from the contact cooling sensation fiber of the present invention is not particularly limited.
- a fabric such as a woven fabric or a knitted fabric, a primary processed product such as a non-woven fabric, or a fabric obtained by further processing the woven fabric described above.
- the next processed product (described later) can be mentioned.
- the primary processed product there is a form of a woven fabric having a flat shape with a certain width and thickness by combining warp and weft at a right angle, or a knitted form having a flat shape by connecting stitches (loops). This includes the forms of twists, braids, laces and felts.
- the form of a woven fabric or a knitted fabric is preferable because it can sufficiently exhibit the property of feeling of cold contact.
- the fiber of the present invention has the above-described polyacetal copolymer (X) containing a specific amount of oxyalkylene groups on the surface.
- a textile product such as a fabric
- fibers having the above-mentioned polyacetal copolymer (X) containing a specific amount of oxyalkylene groups on the surface Fibers having a polyacetal copolymer (X) containing on the surface and fibers other than the above-mentioned fibers having the polyacetal copolymer (X) containing the specific amount of oxyalkylene groups (hereinafter referred to as “other fibers”) And may be used in combination.
- the higher the ratio of the fibers having the above-mentioned polyacetal copolymer (X) containing a specific amount of oxyalkylene groups the better the feeling of cool contact, the better.
- the “other fiber” described above is not particularly limited as long as it is a fiber other than the above-described fiber having a specific amount of oxyalkylene group-containing polyacetal copolymer (X).
- X oxyalkylene group-containing polyacetal copolymer
- synthesis of nylon, polyester, polyurethane, etc. Examples include natural fibers such as fiber, cotton, hemp, and silk.
- the cross-sectional shape of the other fibers can be designed in various ways depending on the shape of the nozzle cap at the time of melt spinning, but is not particularly limited, and may be a simple circular shape or a modified cross-sectional shape. Especially, a contact cold feeling can be further heightened by setting it as an irregular cross section.
- the fiber of the present invention includes a fiber having a polyacetal copolymer (X) containing a specific amount of the oxyalkylene group described above on the surface, a synthetic fiber such as nylon, polyester and polyurethane, or a natural fiber such as cotton, hemp and silk.
- the fibers may be combined to form a twisted yarn or a covering yarn.
- a fiber having a polyacetal copolymer (X) containing a specific amount of the oxyalkylene group described above on the surface and a synthetic fiber such as nylon, polyester or polyurethane, or a natural fiber such as cotton, hemp or silk, It may be blended.
- the method for processing the contact cooling sensation fiber of the present invention into a textile product such as a fabric is not particularly limited, and generally known methods can be used.
- a textile product such as a fabric
- Various manufacturing methods can be used.
- the weaving method is not particularly limited, and the woven fabric may be in the form of a plain weave, a twill weave, a satin weave, a nanako weave, a crest weave, or the like.
- it is knitted it may be in the form of warp knitting, weft knitting, flat knitting, rib knitting, double knitting, pearl knitting, or the like.
- the primary processed product such as the fabric obtained from the contact cooling sensation fiber of the present invention is also excellent in the contact cooling sensation, so that it is further processed into secondary processed products such as clothing, bedding, interior goods, household goods, and automobile interior goods. be able to.
- the contact cooling sensation fiber of the present invention is basically excellent in washing durability. It can be suitably used as a raw material for textile products.
- the fibers of the present invention include underwear such as underwear, outerwear such as sportswear, trousers, skirts, clothing such as shirts, nightwear, stockings, and tights, bedding such as sheets, duvet covers, and pillow covers, mats, and curtains. It can be suitably used as interior goods such as carpets, household goods such as handkerchiefs and towels, and automobile interior goods such as sheets and seat covers.
- the polyacetal copolymer (X) used in Examples and Comparative Examples is as follows.
- the content of oxyethylene groups (molar amount of oxyethylene groups) in the polyacetal copolymer (X) is a value relative to the sum of the molar amount of oxymethylene groups and the molar amount of oxyethylene groups.
- POM-1 a polyacetal copolymer having an oxyethylene group content of 0.4 mol% and an MVR of 15.
- POM-2 a polyacetal copolymer having an oxyethylene group content of 1.6 mol% and an MVR of 15.
- POM-3 a polyacetal copolymer having an oxyethylene group content of 3.0 mol% and an MVR of 15.
- POM-4 a polyacetal copolymer having an oxyethylene group content of 4.7 mol% and an MVR of 15.
- POM-5 A polyacetal copolymer having an oxyethylene group content of 5.7 mol% and an MVR of 15.
- the polyacetal copolymer fiber for producing the fabric used in the examples and comparative examples was produced as follows.
- the temperature of the cylinder and nozzle part was heated to 200 ° C., and the molten resin was discharged at a rate of 0.8 to 1.2 kg / h from a nozzle having 36 holes with a diameter of 0.6 mm.
- undrawn fibers are continuously collected at a take-up speed of about 200 to 400 m / min, and the obtained undrawn fibers are continuously guided to a heating and drawing step, and subjected to a drawing treatment at a roll temperature of 120 to 140 ° C. Fiber samples were made.
- the discharge rate from the nozzle was 0.4 kg / h for both the core component resin and the sheath component resin.
- PET polyethylene terephthalate resin
- the fineness [dtex (decitex)] of the fiber was obtained by measuring the fine diameter of a single fiber using an optical microscope, calculating the fineness from the density of the fiber, and taking the average value of 50 fibers as the fineness of the fiber.
- the density of the fibers was 1.40 g / cm 3 in the case of single layer fibers of polyacetal copolymer.
- the weighted average value for the density of the constituent materials was used.
- ⁇ Measurement of fiber orientation fc (%)> A wide-angle X-ray diffractometer (DP-D1 manufactured by Shimadzu Corporation) was used to measure CuK ⁇ (using a Ni filter) as a radiation source (output: 45 KV, 40 mA).
- the heat retention rate of the fabric used in the examples and comparative examples is as follows using a heat insulation tester (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd., heat insulation and thermal resistance tester ASTM-100A) according to JIS L 1096 A method. It measured as follows. First, a test piece (cloth) having a size of 40 ⁇ 40 cm was set on a hot plate (aluminum alloy plate) set at a temperature of 36 ⁇ 0.5 ° C., and left for 2 hours. The calorie
- the heat retention rate (%) of the fabric was calculated from the following formula [1]. The smaller the heat retention rate, the faster the heat transfer speed and the better the cool feeling of contact.
- ⁇ Measurement of quick-drying (residual moisture content)> 0.6 g of water was soaked into a 10 cm ⁇ 10 cm cloth, and the cloth was left suspended in an environment of a temperature of 20 ° C. and a relative humidity of 65%. The mass of the fabric that was allowed to stand was measured at regular intervals, and the amount of residual moisture in the fabric was calculated to obtain the residual moisture content (unit: mass%). The time (minutes) until the residual moisture content reached 10% by mass was used as an indicator of quick drying. The shorter the time, the better the quick drying.
- ⁇ Contact cooling test> The feel when touched to the fabrics obtained from the fibers of Examples and Comparative Examples was evaluated in four grades A to D. The evaluation criteria are shown below. A: It is particularly excellent in feeling of contact cooling. B: Excellent contact cooling feeling. C: The feeling of cool contact is good. D: Inferior to the feeling of contact cooling.
- Table 1 shows a fabric prepared using a single layer fiber of a polyacetal copolymer having an oxyethylene group content within a predetermined range, and a multilayer fiber of a polyacetal copolymer having an oxyethylene group content within a predetermined range.
- PVA polylactic acid resin
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Abstract
Description
<1>オキシメチレン基と下記一般式(1)で表されるオキシアルキレン基とを含有するポリアセタールコポリマー(X)を表面に有する繊維であって、
前記ポリアセタールコポリマー(X)中の前記オキシアルキレン基の含有量が、オキシメチレン基のモル量とオキシアルキレン基のモル量の合計に対して0.2~5.0mol%であり、かつ
JIS L 1096 A法にしたがって測定され、下記数式[1]で定義される、前記繊維からなる布地の保温率が10%以下である、接触冷感用繊維。
(式(1)中、R0及びR0’は、各々、水素原子、炭素数1~8のアルキル基、炭素数1~8のアルキル基を有する有機基、フェニル基、又はフェニル基を有する有機基を表す。複数あるR0及びR0’は、同一であってもよく、異なっていてもよい。mは2~6の整数を表す。)
(数式[1]中、Cは、温度36±0.5℃に設定した熱板上に、前記繊維を含む布地を設置した際、2時間の間に前記熱板から放散される単位表面積当たりの熱量を表し、Dは、温度36±0.5℃に設定した熱板上に、前記繊維を含む布地を設置しない際の、2時間の間に前記熱板から放散される単位表面積当たりの熱量を表す。)
<2>前記ポリアセタールコポリマー(X)の分子鎖の配向度が60%以上である、<1>に記載の繊維。
<3>前記ポリアセタールコポリマー(X)を表面に有する繊維が、ポリアセタールコポリマー(X)の単層繊維である、<1>又は<2>に記載の繊維。
<4>前記ポリアセタールコポリマー(X)を表面に有する繊維が、熱可塑性樹脂を含む繊維をポリアセタールコポリマー(X)で被覆した多層繊維である、<1>又は<2>に記載の繊維。
<5>前記ポリアセタールコポリマー(X)を表面に有する繊維が、熱可塑性樹脂を含む繊維の表面にポリアセタールコポリマー(X)を有する複合繊維である、<1>又は<2>に記載の繊維。
<6>前記熱可塑性樹脂が、ポリアセタールホモポリマー、ポリアセタールコポリマー(X)以外のポリアセタールコポリマー、ポリオレフィン樹脂、ポリ乳酸樹脂、ナイロン樹脂、ポリエステル樹脂、ポリビニル樹脂、及びこれらのエラストマーから選択される1種類又は2種類以上である、<4>又は<5>に記載の繊維。
<7><1>~<6>のいずれか一項に記載の繊維を用いた衣料品。
<8><1>~<6>のいずれか一項に記載の繊維を用いた寝装品。
<9><1>~<6>のいずれか一項に記載の繊維を用いたインテリア品。
<10><1>~<6>のいずれか一項に記載の繊維を用いた自動車内装品。
以下、本発明について詳細に説明する。本発明は、オキシメチレン基と後述する一般式(1)で表されるオキシアルキレン基を含有するポリアセタールコポリマー(X)を表面に有する繊維であって、前記ポリアセタールコポリマー(X)中の前記オキシアルキレン基の含有量が、オキシメチレン基のモル量とオキシアルキレン基のモル量の合計に対して0.2~5.0mol%であり、かつJIS L 1096 A法にしたがって測定され、後述する下記数式[1]で定義される前記繊維からなる布地の保温率が10%以下である、接触冷感用繊維である。
本発明の接触冷感用繊維は、オキシメチレン基と後述する一般式(1)で表されるオキシアルキレン基とを含有するポリアセタールコポリマー(X)を表面に有する繊維であって、前記ポリアセタールコポリマー(X)中の前記オキシアルキレン基の含有量が、オキシメチレン基のモル量とオキシアルキレン基のモル量の合計に対して0.2~5.0mol%である。
本発明のポリアセタールコポリマー(X)を表面に有する繊維は、従来公知の繊維の製造方法にしたがって製造できる。例えば、ポリアセタールコポリマー(X)のペレットを溶融紡糸して製造できる。その際、配向度を高くする観点から、溶融紡糸した繊維を更に延伸加工するのが好ましい。延伸加工の条件も従来公知の方法、条件で行うことができる。延伸倍率は、配向度の観点から3倍以上であるのが好ましい。延伸倍率の上限は配向度の点で限定されるものではないが、生産時の安定性(糸切れ防止)や過度なフィブリル化防止の点から15倍である。なお、溶融紡糸、延伸加工の装置は、従来公知の装置を用いて行うことができる。
本発明のポリアセタールコポリマー(X)を表面に有する繊維におけるポリアセタールコポリマー(X)は、分子中にオキシメチレン基(-CH2-O-)以外に、下記一般式(1)で表される構造のオキシアルキレン基を有する。
式(1)中、R0及びR0’は、各々、水素原子、炭素数1~8のアルキル基、炭素数1~8のアルキル基を有する有機基、フェニル基、又はフェニル基を有する有機基を表す。複数あるR0及びR0’は、同一であってもよく、異なっていてもよい。また、mは2~6の整数を表す。
本発明におけるポリアセタールコポリマー(X)の製造方法は任意であり、従来公知の任意の方法によって製造すればよい。例えば、オキシメチレン基と、炭素数2以上4以下のオキシアルキレン基を構成単位とするポリアセタール樹脂の製造方法としては、ホルムアルデヒドの3量体(トリオキサン)や4量体(テトラオキサン)等のオキシメチレン基の環状アセタールと、エチレンオキシド、1,3-ジオキソラン、1,3,6-トリオキソカン、1,3-ジオキセパン等の炭素数2以上4以下のオキシアルキレン基を含む環状アセタールとを共重合することによって製造することができる。中でも本発明のポリアセタールコポリマー(X)としては、トリオキサンやテトラオキサン等の環状アセタールと、エチレンオキシド又は1,3-ジオキソランとの共重合体であることが好ましく、中でもトリオキサンと1,3-ジオキソランとの共重合体であることが特に好ましい。
また、本発明を実施するとき、本発明におけるポリアセタールコポリマー(X)には、本発明の目的を損なわない範囲内で、ヒンダードフェノール化合物、ヒンダードアミン化合物、アミノ置換トリアジン化合物、リン系安定剤、アルカリ金属及びアルカリ土類金属の水酸化物、脂肪酸塩、無機酸塩、又はアルコキシドからなる群で示される金属含有化合物を添加することができる。以下、本明細書では、上述した「ヒンダードフェノール化合物、ヒンダードアミン化合物、アミノ置換トリアジン化合物、リン系安定剤、アルカリ金属及びアルカリ土類金属の水酸化物、脂肪酸塩、無機酸塩、又はアルコキシドからなる群で示される金属含有化合物」のことを「任意成分」ということもある。これらの任意成分としては、従来公知のものを使用することができる。
本発明における接触冷感は、JIS L 1096 A法(恒温法)に従って求められる保温率と相関がある。前記保温率は、熱を伝えにくくする空気の層を繊維の内部に有することで高い値を示す傾向がある。例えば、木綿は繊維の中心部が中空になっているため、熱伝導率が低く、熱が放出されにくい特徴があり、前記保温率は20~30%といった高い値を示す。すなわち、保温率が低いほど接触冷感に優れる傾向がある。
数式[1]中、Cは、温度36±0.5℃に設定した熱板(アルミニウム合金板)上に、前記繊維を含む布地を設置した際、2時間の間に前記熱板から放散される単位表面積当たりの熱量(単位:J/cm2)を表す。Dは、温度36±0.5℃に設定した熱板(アルミニウム合金板)上に、前記繊維を含む布地を設置しない際の、2時間の間に前記熱板から放散される単位表面積当たりの熱量(単位:J/cm2)を表す。
前記保温率は、9%以下がより好ましく、7%以下が特に好ましい。前記保温率が10%以下であれば、接触冷感に優れる。保温率の下限は、接触冷感の点から限定されるものではないので、0%である。保温率は、実施例で述べた方法で測定できる。
本発明における繊維の速乾性とは、水分を含んだ繊維が速く乾く性質を表す指標であり、速乾性に優れることが一般に知られているポリエステル(PET)繊維よりも速く乾く繊維が、肌着や寝具のようにヒトの肌に接する用途として清涼感を与え、より接触冷感を感じやすいので好ましい。これは、肌から繊維に吸収された水分が蒸発する際に、潜熱を奪うことによるものと考えられる。速乾性は、実施例で述べる方法で測定できる。PET繊維からなる繊維の乾燥速度を基準(1.0)とした場合、0.9以下が好ましく、0.8以下がより好ましい。速乾性は、ポリアセタールコポリマー(X)中のオキシアルキレン基の含有量が少ないほど優れる傾向がある。速乾性の点から、本発明の繊維におけるポリアセタールコポリマー(X)中のオキシアルキレン基の含有量は5mol%以下が好ましく、2mol%以下が特に好ましい。また、速乾性は、ポリアセタールコポリマー(X)の分子鎖の配向度が高いほど優れる傾向がある。速乾性の点から、配向度は、60%以上が好ましく、70%以上がより好ましく、80%以上がさらに好ましく、90%以上が特に好ましい。
本発明における繊維の光沢性とは、繊維の表面が光を受けた際の輝きの度合いを表す指標であり、数値が大きいほど、表面が滑らかで艶があり高級感を付与することができる。光沢性は、実施例で述べた可視光線の反射率を測定する方法で、測定できる。PET繊維の光沢性を基準(1.0)とした場合、1.1以上が好ましく、1.2以上がより好ましい。光沢性は、ポリアセタールコポリマー(X)中のオキシアルキレン基の含有量が5mol%以下であれば良い傾向があるので、本発明の繊維におけるポリアセタールコポリマー(X)中のオキシアルキレン基の含有量は5mol%以下が好ましい。
本発明の接触冷感用繊維から得られる繊維製品は、特に限定されるものではなく、例えば、織物、編物などの布地、不織布といった一次加工品、前記した織物などを更に加工して得られる二次加工品(後述)が挙げられる。前記一次加工品としては、具体的には、たて糸とよこ糸を直角に組み合わせて一定の幅と厚みをもった平面状とする織物や、編目(ループ)をつなげて平面状とする編物の形態が挙げられ、撚り、組物、レース、フェルトの形態もこれに含まれる。特に、織物、編物の形態が、接触冷感の特性を十分に発揮できるので好ましい。
実施例及び比較例で用いたポリアセタールコポリマー(X)は、以下のとおりである。なお、ポリアセタールコポリマー(X)中のオキシエチレン基の含有量(オキシエチレン基のモル量)は、オキシメチレン基のモル量とオキシエチレン基のモル量の合計に対する値である。
POM-1:オキシエチレン基の含有量が0.4mol%であり、MVRが15であるポリアセタールコポリマー。
POM-2:オキシエチレン基の含有量が1.6mol%であり、MVRが15であるポリアセタールコポリマー。
POM-3:オキシエチレン基の含有量が3.0mol%であり、MVRが15であるポリアセタールコポリマー。
POM-4:オキシエチレン基の含有量が4.7mol%であり、MVRが15であるポリアセタールコポリマー。
POM-5:オキシエチレン基の含有量が5.7mol%であり、MVRが15であるポリアセタールコポリマー。
ポリアセタールコポリマー(X)のMVRは、ISO1133に従って測定した。
実施例及び比較例で用いたポリアセタールコポリマーをヘキサフルオロイソプロパノール(d2)に溶解させて、NMR測定試料を作製し、この測定試料についてNMRスペクトルを測定して、ポリアセタールコポリマー中のオキシエチレン基の含有量を測定した。
実施例及び比較例で用いた布地を作成するためのポリアセタールコポリマー繊維は次のようにして作成した。シリンダー、ノズル部の温度を200℃に加温し、直径が0.6mmのホールを36個備えたノズルから0.8~1.2kg/hの速度で、溶融樹脂を吐出した。この時、引取り速度を約200~400m/分で連続的に未延伸繊維を採取し、得られた未延伸繊維を引き続き加熱延伸工程へ導き、ロール温度120~140℃で延伸処理を行って繊維試料を作成した。なお、芯鞘複合繊維の場合は、ノズルからの吐出速度は、芯成分の樹脂、鞘成分の樹脂ともに0.4kg/hとした。
PET(ポリエチレンテレフタレート樹脂):単繊度2デシテックスのマルチフィラメントをそのまま用いた。
繊維の繊度[dtex(デシテックス)]は、光学顕微鏡を用いて単繊維の繊径を測定し、繊維の密度から繊度を算出し、測定本数50本の平均値を、繊維の繊度とした。繊維の密度は、ポリアセタールコポリマーの単層繊維の場合は、1.40g/cm3とした。また、多層繊維の場合は、構成する材料の密度についての加重平均値とした。また、PETの単層繊維の場合は、1.37g/cm3とした。
広角X線回折装置(株式会社島津製作所製 DP-D1)を用い、CuKα(Niフイルターを使用)を線源として測定した(出力45KV、40mA)。分子鎖の配向度(fc)は、2θ=22.2°付近に観察される(100)面について、円周方向にスキャンして得られる回折強度の分布曲線(方位角分布曲線)の半値幅FWHM(°)から、下記の数式[2]を用いて求めた。
実施例及び比較例で用いた布地は、上述の方法で作成したポリアセタールコポリマーを表面に有する繊維又はPET繊維を用いて、縦密度130本/インチ、横密度96本/インチにて編み立てて作成した。
実施例及び比較例で用いた布地の保温率は、JIS L 1096 A法に従って、保温性試験機(株式会社 大栄科学精器製作所製、保温・熱抵抗試験機ASTM-100A)を用いて、以下のようにして測定した。まず、温度36±0.5℃に設定した熱板(アルミニウム合金板)上に、大きさ40×40cmの試験片(布地)をセットし、2時間放置した。2時間の間に前記試験片を介して放散された単位表面積当たりの熱量C(単位:J/cm2)を求めた。一方、前記試験片をセットしない状態においても同様の操作をおこない、2時間の間に放散された単位表面積当たりの熱量D(単位:J/cm2)を別途求めた。布地の保温率(%)は、下記の数式[1]から算出した。保温率が小さいほど、熱の移動速度が速く、接触冷感に優れる。
大きさ10cm×10cmの布地に0.6gの水をしみこませ、温度20℃、相対湿度65%の環境中に、この布地を吊り下げた状態で放置した。一定時間ごとに、放置した布地の質量を測定して、布地中の残留水分量を算出し、残留水分率(単位:質量%)として求めた。残留水分率が10質量%に到達するまでの時間(分)を速乾性の指標とした。時間が短いほど、速乾性に優れる。
株式会社島津製作所製の紫外・可視・近赤外分光光度計UV-3600(積分球:ISR-3100)を用いて、測定波長域400~780nmにおける光線反射率として、可視光線反射率を求めた。可視光線反射率が大きいほど光沢性が高いことを意味する。
実施例及び比較例の繊維から得られた布地に、触れたときの感触をA~Dの4段階で評価した。以下に評価の基準を示した。
A:接触冷感に特に優れる。
B:接触冷感に優れる。
C:接触冷感は良好である。
D:接触冷感に劣る。
表1に、オキシエチレン基の含有量が所定範囲内であるポリアセタールコポリマーの単層繊維を用いて作成した布地、オキシエチレン基含有量が所定範囲内であるポリアセタールコポリマーの多層繊維を用いて作成した布地、オキシエチレン基含有量が所定範囲内であるポリアセタールコポリマーとポリ乳酸樹脂(PLA)の多層繊維を用いて作成した布地に関する実施例、並びにPET繊維を用いて作成した布地、オキシエチレン基含有量が所定範囲よりも多いポリアセタールコポリマー単層繊維を用いて作成した布地に関する比較例を示した。
Claims (10)
- オキシメチレン基と下記一般式(1)で表されるオキシアルキレン基とを含有するポリアセタールコポリマー(X)を表面に有する繊維であって、
前記ポリアセタールコポリマー(X)中の前記オキシアルキレン基の含有量が、オキシメチレン基のモル量とオキシアルキレン基のモル量の合計に対して0.2~5.0mol%であり、かつ
JIS L 1096 A法にしたがって測定され、下記数式[1]で定義される、前記繊維からなる布地の保温率が10%以下である、接触冷感用繊維。
(式(1)中、R0及びR0’は、各々、水素原子、炭素数1~8のアルキル基、炭素数1~8のアルキル基を有する有機基、フェニル基、又はフェニル基を有する有機基を表す。複数あるR0及びR0’は、同一であってもよく、異なっていてもよい。mは2~6の整数を表す。)
(数式[1]中、Cは、温度36±0.5℃に設定した熱板上に、前記繊維を含む布地を設置した際、2時間の間に前記熱板から放散される単位表面積当たりの熱量を表し、Dは、温度36±0.5℃に設定した熱板上に、前記繊維を含む布地を設置しない際の、2時間の間に前記熱板から放散される単位表面積当たりの熱量を表す。) - 前記ポリアセタールコポリマー(X)の分子鎖の配向度が60%以上である、請求項1に記載の繊維。
- 前記ポリアセタールコポリマー(X)を表面に有する繊維が、ポリアセタールコポリマー(X)の単層繊維である、請求項1又は2に記載の繊維。
- 前記ポリアセタールコポリマー(X)を表面に有する繊維が、熱可塑性樹脂を含む繊維をポリアセタールコポリマー(X)で被覆した多層繊維である、請求項1又は2に記載の繊維。
- 前記ポリアセタールコポリマー(X)を表面に有する繊維が、熱可塑性樹脂を含む繊維の表面にポリアセタールコポリマー(X)を有する複合繊維である、請求項1又は2に記載の繊維。
- 前記熱可塑性樹脂が、ポリアセタールホモポリマー、ポリアセタールコポリマー(X)以外のポリアセタールコポリマー、ポリオレフィン樹脂、ポリ乳酸樹脂、ナイロン樹脂、ポリエステル樹脂、ポリビニル樹脂、及びこれらのエラストマーから選択される1種類又は2種類以上である、請求項4又は5に記載の繊維。
- 請求項1~6のいずれか一項に記載の繊維を用いた衣料品。
- 請求項1~6のいずれか一項に記載の繊維を用いた寝装品。
- 請求項1~6のいずれか一項に記載の繊維を用いたインテリア品。
- 請求項1~6のいずれか一項に記載の繊維を用いた自動車内装品。
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CN110017699B (zh) * | 2019-04-03 | 2020-07-24 | 中国船舶重工集团公司第七一九研究所 | 一种抽气器换热管振动的控制方法及*** |
KR102212470B1 (ko) | 2019-08-12 | 2021-02-04 | 주식회사 웰테크글로벌 | 심초형 접촉 냉감용 복합방사섬유 및 이를 구비하는 원단과 의류 |
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