WO2018181319A1 - シート状物 - Google Patents
シート状物 Download PDFInfo
- Publication number
- WO2018181319A1 WO2018181319A1 PCT/JP2018/012446 JP2018012446W WO2018181319A1 WO 2018181319 A1 WO2018181319 A1 WO 2018181319A1 JP 2018012446 W JP2018012446 W JP 2018012446W WO 2018181319 A1 WO2018181319 A1 WO 2018181319A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- woven
- derived
- polyurethane resin
- acid
- Prior art date
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Classifications
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- C08L75/04—Polyurethanes
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0075—Napping, teasing, raising or abrading of the resin coating
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/22—Mixtures comprising a continuous polymer matrix in which are dispersed crosslinked particles of another polymer
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Definitions
- the present invention relates to a sheet-like material, particularly preferably a sheet-like material having napping.
- a sheet-like material having a surface feeling of suede or nubuck is known by having napping on the surface of a sheet-like material impregnated with an elastic resin on a substrate made of fibers.
- the characteristics of the target sheet-like material can be arbitrarily designed widely by combining the base material made of fibers and the elastic resin.
- the fiber polyester fiber is widely used because of its mechanical strength and chemical stability and its low cost.
- the elastic resin a polyurethane resin is widely used because durability and texture can be controlled by a combination of diol species.
- polyester especially polyethylene terephthalate
- polyurethane resins are produced from various polymer diols and isocyanates.
- Oil a fossil resource, is an important raw material for the chemical industry, but there are concerns about depletion in the future.
- carbon dioxide is emitted during the manufacturing process and incineration disposal, a series of problems such as global warming are incurred. Under such circumstances, much attention has been paid to recycled raw materials and materials with low environmental impact.
- Biomass resources are plants converted from water and carbon dioxide as raw materials by photosynthesis, and include starch, carbohydrates, cellulose, and lignin. Biomass resources use carbon dioxide as a raw material in the production process. Therefore, even if materials using biomass resources are incinerated after use and decomposed into carbon dioxide and water, new carbon dioxide is emitted. It can be said that it is a renewable resource because it will be taken into the plant again in some cases. Therefore, if these biomass resources can be used as an alternative to petroleum resources, the reduction of fossil resources will be suppressed, and the amount of carbon dioxide emissions will also be suppressed.
- polyester fibers and polyurethane resins from renewable biomass resources have been studied.
- examples thereof include polyethylene terephthalate (PET) using plant-derived ethylene glycol as a raw material and polycarbonate-based polyurethane using plant-derived polymer diol as a raw material.
- PET polyethylene terephthalate
- polycarbonate-based polyurethane using plant-derived polymer diol as a raw material.
- Patent Documents 2 and 3 propose a method of combining polycarbonate diols having different carbon numbers to achieve both low-temperature characteristics and a flexible texture (see Patent Document 2 and Patent Document 3).
- woven and knitted fabrics are composed of high-strength fibers such as high-strength polyvinyl alcohol-based synthetic fibers (high-strength vinylon fibers) and wholly aromatic polyamide fibers (aramid fibers).
- high-strength fibers such as high-strength polyvinyl alcohol-based synthetic fibers (high-strength vinylon fibers) and wholly aromatic polyamide fibers (aramid fibers).
- high-strength vinylon fibers high-strength vinylon fibers
- aramid fibers wholly aromatic polyamide fibers
- Patent Document 1 examination of a nap-like sheet having a uniform and elegant nap quality is not sufficient. Further, in Patent Documents 2 and 3, there is still a problem in flexibility, and examination on a sheet-like material having napping is insufficient. Furthermore, in Patent Document 4, when the woven and knitted fabric and the nonwoven fabric are entangled and integrated by the needle punch, the woven or knitted fabric is damaged by the needle, so that the mechanical characteristics inherent to the woven and knitted fabric cannot be fully utilized. In addition, if the woven or knitted fabric is densified and the strength is increased in anticipation of such damage, the woven or knitted fabric increases in rigidity, which may be disadvantageous for the purpose of obtaining a flexible artificial leather. there were.
- an object of the present invention is to provide a sheet-like material containing a plant-derived component having a low environmental load in view of the background of the above-described conventional technology. More specifically, an object of the present invention is to provide a nap-like sheet-like material having uniform and elegant napping even when fibers and elastic resins containing plant-derived components are used. Another object of the present invention is to provide a sheet-like product that is high in strength, excellent in form stability, lightweight and rich in flexibility, using a woven or knitted fabric made of fibers containing plant-derived components.
- the sheet-like material of the present invention is a sheet-like material comprising a nonwoven fabric composed of ultrafine fibers having an average single fiber diameter of 0.3 to 7 ⁇ m and an elastic resin.
- the polymer constituting the ultrafine fiber is a polyester obtained from a dicarboxylic acid and / or an ester-forming derivative thereof and a diol, and 1,2-propanediol-derived components are contained in 1 to 2 in the polyester.
- the elastic resin contains a structural unit derived from an alkanediol (a1) having 3 to 5 carbon atoms and a structural unit derived from an alkanediol (a2) having 8 to 20 carbon atoms,
- the molar ratio of the alkanediol (a2) to the total number of moles of the alkanediol (a1) and the alkanediol (a2) is 50
- a sheet-like product characterized by being a polyurethane resin (D) containing 95% by mol of a copolymerized polycarbonate diol (A1), an organic diisocyanate (B), and a chain extender (C) as essential constituent monomers. .
- the surface of the sheet-like material has nappings, and the elastic resin is present in the internal space of the nonwoven fabric.
- the polyurethane resin (D) further comprises a polycarbonate diol (A2) comprising a structural unit derived from an alkanediol (a3) having 4 to 6 carbon atoms. It is contained as a polymer.
- the elastic resin has a porous structure, and the proportion of fine pores having a pore diameter of 0.1 to 20 ⁇ m in all the pores of the porous structure is 60%. That is all.
- the present invention is a sheet-like product comprising a sheet base material in which a nonwoven fabric mainly composed of ultrafine fibers and a woven / knitted fabric are laminated and integrated, and an elastic resin, wherein the woven / knitted fabric is composed of fibers containing polyester as a main component.
- the polyester contains 1 to 500 ppm of a component derived from 1,2-propanediol in the polyester.
- the single fiber diameter of the yarn constituting the woven or knitted fabric is 0.3 to 50 ⁇ m.
- plant-derived components can be used for the ultrafine fiber and the elastic resin, not only is it an environmentally friendly material, but the heat resistance of the polymer is improved, and the abrasion resistance of the fiber is improved. Then, since the alkanediol in the elastic resin has a specific composition, the napping property of the elastic resin during the napping process is improved, whereby a napped-toned sheet-like product having uniform and elegant napping is obtained.
- the heat resistance of the polymer is improved, the abrasion resistance of the fibers is improved, and the damage of the woven or knitted fabric in the sheet-like material is reduced, so that it is not necessary to increase the density of the woven or knitted fabric in anticipation of the damage of the woven or knitted fabric. It is possible to obtain a sheet-like material that is lightweight and rich in flexibility, high strength, and excellent shape stability.
- the sheet-like material of the present invention is a sheet-like material composed of a nonwoven fabric composed of ultrafine fibers having an average single fiber diameter of 0.3 to 7 ⁇ m and an elastic resin, wherein the polymer constituting the ultrafine fibers is dicarboxylic acid and / Or a polyester obtained from an ester-forming derivative thereof and a diol, wherein the polyester contains 1 to 500 ppm of a component derived from 1,2-propanediol, and the elastic resin has a carbon number of 3
- the sheet-like material of the present invention is a sheet-like material made of a nonwoven fabric made of ultrafine fibers having an average single fiber diameter of 0.3 to 7 ⁇ m and an elastic resin.
- ultrafine fibers constituting the nonwoven fabric examples include polyesters obtained from dicarboxylic acids and / or ester-forming derivatives thereof (hereinafter also referred to as dicarboxylic acid components) and diols, that is, polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate. Can be used. In addition, it is allowed for the nonwoven fabric to be mixed with ultrafine fibers of different materials.
- the polyester used in the present invention is obtained from a dicarboxylic acid component and a diol, and the content of a component derived from 1,2-propanediol contained in the polyester is in the range of 1 to 500 ppm, preferably 10 to 400 ppm. Range.
- the content of the component derived from 1,2-propanediol in the obtained polyester is more than 500 ppm, the heat resistance of the polyester is lowered, and when the content is less than 1 ppm, the heat resistance improving effect is not exhibited.
- the component derived from 1,2-propanediol as used herein refers to the total amount of 1,2-propanediol detected when the polyester is decomposed and analyzed, and the 1,2-propanediol-derived component is copolymerized in the polymer chain. This represents the total amount of 1,2-propanediol having a structure derived from 2-propanediol and 1,2-propanediol mixed between the polymers. That is, the 1,2-propanediol may be partially copolymerized in the polyester main chain, and may be included as a simple substance without being copolymerized.
- dicarboxylic acid and / or ester-forming derivative thereof used in the present invention examples include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid (for example, 2,6-naphthalenedicarboxylic acid), diphenyldicarboxylic acid (for example, diphenyl-4) , 4'-dicarboxylic acid), oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid and other aliphatic carboxylic acids, cyclohexane Alicyclic dicarboxylic acid such as dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 5-sulfoisophthalic acid salt (5-sulfoisophthalic acid lithium salt, 5-sulfoisophthalic acid potassium salt
- the ester-forming derivative referred to in the present invention means lower alkyl esters, acid anhydrides and acyl chlorides of these dicarboxylic acids, and for example, methyl esters, ethyl esters and hydroxyethyl esters are preferably used.
- a more preferred embodiment of the dicarboxylic acid and / or ester-forming derivative thereof used in the present invention is terephthalic acid and / or dimethyl ester thereof.
- terephthalic acid and / or its dimethyl ester may be derived from plants.
- a method for obtaining plant-derived terephthalic acid for example, p-cymene is synthesized from cineol obtained from a plant of the genus Eucalyptus (see the Chemical Society of Japan, (2), P217-219; 1986), and then p-methylbenzoic acid.
- a method of obtaining terephthalic acid through an acid (Organic Synthesis, 27; 1947) is mentioned.
- Still another method includes a method of obtaining terephthalic acid from furandicarboxylic acid and ethylene by Diels-Alder reaction (see WO 2009-0664515). The plant-derived terephthalic acid thus obtained is allowed to be further converted into an ester-forming derivative.
- Examples of the diol used in the present invention include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, cyclohexanedimethanol, diethylene glycol, 2-ethylenediol, Examples thereof include diol components such as methyl-1,3-propanediol, polyoxyalkylene glycol having a molecular weight of 500 to 20000 (polyethylene glycol, etc.), and bisphenol A-ethylene oxide adduct, among which ethylene glycol is preferably used. Furthermore, as ethylene glycol, plant-derived ethylene glycol often contains 1,2-propanediol, and therefore it is more preferable to use plant-derived ethylene glycol whose content is adjusted by purification. is there.
- Examples of the method for obtaining plant-derived ethylene glycol include methods for obtaining from corn, sugar cane, wheat, and crop stalks. These are first converted to starch, starch is converted to glucose with water and enzyme, then converted to sorbitol by hydrogenation reaction, and sorbitol is subsequently converted by hydrogenation reaction in the presence of catalyst at a constant temperature and pressure. There is a method in which ethylene glycol is obtained by refining a mixture of various glycols.
- the ratio of plant-derived components is calculated by calculating and calculating the ratio of plant-derived carbon and fossil fuel-derived carbon by analyzing the concentration of radioactive carbon (C14) according to the biobase concentration test standard defined in ASTM D6866. Calculated as a value.
- the plant-derived ratio of the obtained polyester is preferably 10% by mass or more, more preferably 15% by mass or more, and this plant-derived ratio is preferably a large aspect.
- the polyester used in the present invention is preferably polyethylene terephthalate obtained using terephthalic acid and / or its dimethyl ester as the dicarboxylic acid component and ethylene glycol as the diol component, and is a polyester copolymer mainly containing ethylene terephthalate units. If it exists, the improvement effect of heat resistance becomes more remarkable.
- the polyester copolymer component used in the present invention may contain structural units derived from the following components.
- aliphatic carboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid and dodecanedioic acid
- alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid Terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and isophthalic acid, 5-sulfoisophthalic acid salt (5-sulfoisophthalic acid lithium salt, 5-sulfoisophthalic acid potassium salt, and Structural units derived from aromatic dicarboxylic acids such as 5-sulfoisophthalic acid sodium salt) can be included.
- diol component examples include 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, polyoxyalkylene glycol having a molecular weight of 500 to 20000 (polyethylene glycol, etc.) And diol components such as diethylene glycol, 2-methyl-1,3-propanediol, and bisphenol A-ethylene oxide adduct.
- 5-sulfoisophthalate such as lithium 5-sulfoisophthalate, potassium 5-sulfoisophthalate, and sodium 5-sulfoisophthalate and ester-forming derivatives thereof, and polyoxy having a molecular weight of 500 to 20000.
- Alkylene glycol is preferably used.
- polyoxyalkylene glycol polyethylene glycol is preferable, and polyethylene glycol having a molecular weight of 500 to 10,000 is particularly preferable.
- the 5-sulfoisophthalate is preferably copolymerized in an amount of 0.1 to 10 mol% based on the total dicarboxylic acid component constituting the polyester, and a polyoxyalkylene glycol having a molecular weight of 500 to 20000 is obtained as a polyester.
- Copolymerization is preferably from 0.1 to 10.0% by mass based on the mass of
- copolymerization components may be used alone, but when two or more types are copolymerized, the effect of improving heat resistance becomes more remarkable.
- the polyester containing the copolymer component is also preferably used as, for example, a sea component (elution component) of a sea-island composite fiber.
- a sea component elution component
- the inclusion of a component derived from 1,2-propanediol improves the compatibility with ordinary polyester due to the effect of inhibiting the crystallinity, etc., which is more preferable. Can be used.
- the polyester polymer constituting the ultrafine fiber made of polyester used in the present invention can contain additives such as particles, flame retardant and antistatic agent.
- a round cross section may be used, but a polygonal shape such as an ellipse, a flat shape, and a triangle, and a deformed cross section such as a sector shape and a cross shape may be employed.
- the average single fiber diameter of the ultrafine fibers constituting the nonwoven fabric is 7 ⁇ m or less from the viewpoint of flexibility and napped quality of the sheet-like material of the present invention.
- it is 6 micrometers or less, More preferably, it is 5 micrometers or less.
- the average single fiber diameter of the ultrafine fibers is 0.3 ⁇ m or more.
- it is 0.7 micrometer or more, More preferably, it is 1 micrometer or more.
- the average single fiber diameter here refers to a fiber diameter of any 50 ultrafine fibers per cross section obtained by observing three cross sections obtained by cutting the obtained sheet-like material in the thickness direction with a scanning electron microscope (SEM). And an average value of the diameters of a total of 150 fibers is calculated.
- non-woven fabric As the form of the non-woven fabric, a non-woven fabric formed by intertwining each single fiber of ultrafine fibers or a non-woven fabric formed by intertwining fiber bundles of ultrafine fibers can be used, but the fiber bundle of ultrafine fibers is intertwined.
- Nonwoven fabrics are preferably used from the viewpoint of the strength and texture of the sheet-like material. From the viewpoints of flexibility and texture, a nonwoven fabric having an appropriate gap between ultrafine fibers inside the fiber bundle is particularly preferably used.
- the nonwoven fabric formed by the entanglement of the fiber bundles of ultrafine fibers can be obtained, for example, by causing the ultrafine fibers to develop after entanglement of the ultrafine fiber expression type fibers in advance.
- gap between the microfibers inside a fiber bundle may give a moderate space
- nonwoven fabric either a short fiber nonwoven fabric or a long fiber nonwoven fabric may be used, but a short fiber nonwoven fabric is preferably used in terms of texture and quality.
- the fiber length of the short fibers in the short fiber nonwoven fabric is in the range of 25 to 90 mm.
- the fiber length is more preferably 35 to 80 mm, particularly preferably 40 to 70 mm.
- the ultrafine fiber or its fiber bundle constitutes a nonwoven fabric
- a woven fabric or a knitted fabric can be inserted, laminated, or lined for the purpose of improving the strength.
- a nonwoven fabric mainly composed of ultrafine fibers and a woven / knitted fabric are intertwined and integrated.
- the yarn of the woven or knitted fabric is a strong twisted yarn in order to prevent the fibers constituting the woven or knitted fabric from being damaged by the needle punch.
- the twist number of the strong twisted yarn is preferably in the range of 1000 T / m to 4500 T / m.
- the yarn constituting the woven or knitted fabric has a strong force to maintain an integral rod-like structure, The single fiber constituting the needle does not get caught in the barb of the needle, and the physical properties of the product are deteriorated and the single fiber is less exposed to the product surface.
- the number of twists to preferably 4500 T / m or less, more preferably 4000 T / m or less, not only the single fiber breakage is suppressed, but also the yarn (strong twist yarn) constituting the woven or knitted fabric does not become too hard, A soft texture can be obtained.
- the single fiber diameter of the yarn constituting the woven or knitted fabric is preferably in the range of 0.3 ⁇ m to 50 ⁇ m.
- the needle punch can suppress the cutting of the yarn constituting the woven or knitted fabric, thereby improving the form stability of the product as a sheet-like product.
- the obtained sheet-like product is lightweight and rich in flexibility.
- the single fiber diameter is preferably 40 ⁇ m or less, more preferably 20 ⁇ m or less, a sheet-like material having excellent flexibility can be obtained.
- the woven or knitted fabric used in the present invention is a general term for woven fabrics or knitted fabrics.
- the woven fabrics include plain weaves, twill weaves, and satin weaves.
- Examples include deformed tissue.
- simple circular knitting is preferable because of its high productivity.
- a plain weave structure These fabrics are preferably used.
- the thickness of the woven or knitted fabric is preferably 0.10 mm to 0.40 mm, more preferably 0.15 mm to 0.30 mm.
- the thickness of the woven or knitted fabric is preferably 0.10 mm to 0.40 mm, more preferably 0.15 mm to 0.30 mm.
- the woven density of the woven fabric is 40 / 2.54 cm (inch) to 200 / 2.54 cm (inch) for both warp and weft yarns in the sheet-like material. It is preferable to adjust to.
- the woven density of the fabric in the sheet-like material is 40 pieces / 2.54 cm (inch) or more, a sheet-like material having excellent shape stability can be obtained.
- the texture of the sheet-like material can be made flexible by setting the knitting density of the woven or knitted material in the sheet-like material to 200 pieces / 2.54 cm (inch) or less.
- polyester fiber such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate and polylactic acid, synthetic fiber such as polyamide such as 6-nylon and 66-nylon, cellulosic polymer, etc. Fibers and natural fibers such as cotton and hemp can be used. Among these, it is preferable to use polyester.
- the polyester preferably used for the woven or knitted fabric is obtained from a dicarboxylic acid and / or an ester-forming derivative thereof and a diol, and the content of the 1,2-propanediol-derived component contained in the polyester is in the range of 1 to 500 ppm. Preferably, it is in the range of 10 to 400 ppm.
- the content of the component derived from 1,2-propanediol in the obtained polyester is more than 500 ppm, the heat resistance of the polyester is lowered, and when the content is less than 1 ppm, the heat resistance improving effect is not exhibited.
- Polyesters containing 1,2-propanediol-derived components in the above range are excellent in heat resistance during melt molding, so that woven or knitted fabrics made from synthetic fibers obtained from the above polyesters have tensile strength and Excellent wear characteristics. That is, when used as a woven or knitted fabric entangled and integrated with a nonwoven fabric, it suppresses damage to the fibers constituting the woven or knitted fabric by the needle punch when entangled and integrated with a nonwoven fabric composed of ultrafine fibers or ultrafine fiber generating fibers. Therefore, it is not necessary to increase the density in anticipation of damage to the woven or knitted fabric, and the obtained sheet-like product is excellent in form stability, light in weight, and rich in flexibility.
- the component derived from 1,2-propanediol as used herein refers to the total amount of 1,2-propanediol detected when the polyester is decomposed and analyzed, and the 1,2-propanediol-derived component is copolymerized in the polymer chain. This represents the total amount of 1,2-propanediol having a structure derived from 2-propanediol and 1,2-propanediol mixed between the polymers. That is, the 1,2-propanediol may be partially copolymerized in the polyester main chain, and may be included as a simple substance without being copolymerized.
- Examples of the dicarboxylic acid and / or ester-forming derivative thereof used in the polyester include terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyl-4,4′-dicarboxylic acid and ester-forming derivatives thereof. It is done.
- the ester-forming derivatives referred to in the present invention are lower alkyl esters, acid anhydrides, acyl chlorides and the like of these dicarboxylic acids, and specifically, methyl esters, ethyl esters, hydroxyethyl esters, and the like are preferably used.
- a more preferred embodiment of the dicarboxylic acid and / or ester-forming derivative thereof used in the present invention is terephthalic acid and / or dimethyl ester thereof.
- terephthalic acid and / or its dimethyl ester may be derived from plants.
- a method for obtaining plant-derived terephthalic acid for example, p-cymene is synthesized from cineol obtained from a plant of the genus Eucalyptus (see the Chemical Society of Japan, (2), P217-219; 1986), and then p-methylbenzoic acid.
- a method of obtaining terephthalic acid through an acid (Organic Synthesis, 27; 1947) is mentioned.
- Still another method includes a method of obtaining terephthalic acid from furandicarboxylic acid and ethylene by Diels-Alder reaction (see WO 2009-0664515). The plant-derived terephthalic acid thus obtained is allowed to be further converted into an ester-forming derivative.
- diol examples include ethylene glycol, 1,3-propanediol, 1,4-butanediol, cyclohexanedimethanol and the like.
- ethylene glycol is preferably used.
- plant-derived ethylene glycol often contains 1,2-propanediol, and therefore it is more preferable to use plant-derived ethylene glycol whose content is adjusted by purification. is there.
- Examples of the method for obtaining plant-derived ethylene glycol include methods for obtaining from corn, sugar cane, wheat, and crop stalks. These are first converted to starch, starch is converted to glucose with water and enzyme, and then converted to sorbitol by hydrogenation reaction. There is a method in which ethylene glycol is obtained by refining a mixture of various glycols.
- the ratio of plant-derived components is calculated by calculating and calculating the ratio of plant-derived carbon and fossil fuel-derived carbon by analyzing the concentration of radioactive carbon (C14) according to the biobase concentration test standard defined in ASTM D6866. Calculated as a value.
- the plant-derived ratio of the obtained polyester is preferably 10% by mass or more, more preferably 15% by mass or more, and this plant-derived ratio is preferably a large aspect.
- the polyester used in the woven or knitted fabric is preferably polyethylene terephthalate obtained by using terephthalic acid and / or dimethyl ester thereof as the dicarboxylic acid and / or ester-forming derivative component thereof and ethylene glycol as the diol component, and mainly ethylene terephthalate.
- the polyester copolymer contains units, the effect of improving heat resistance becomes more remarkable.
- aliphatic carboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid and dodecanedioic acid
- alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid Terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and isophthalic acid
- 5-sulfoisophthalic acid salt (5-sulfoisophthalic acid lithium salt, 5-sulfoisophthalic acid potassium salt
- Structural units derived from aromatic dicarboxylic acids such as 5-sulfo
- diol component examples include 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, polyoxyalkylene glycol having a molecular weight of 500 to 20000 (polyethylene glycol, etc.) And diol components such as diethylene glycol, 2-methyl-1,3-propanediol, and bisphenol A-ethylene oxide adduct.
- the polyester polymer comprising the polyester used in the present invention may contain additives such as particles, flame retardants and antistatic agents.
- the elastic resin in the present invention is a polyurethane resin (D).
- the polyurethane resin (D) comprises a copolymer polycarbonate diol (A1), an organic diisocyanate (B), and a chain extender (C) as essential constituent monomers.
- the copolymerized polycarbonate diol (A1) includes a structural unit derived from an alkanediol (a1) having 3 to 5 carbon atoms and a structural unit derived from an alkanediol (a2) having 8 to 20 carbon atoms, and the alkanediol ( A copolymeric polycarbonate diol in which the molar ratio of alkanediol (a2) to the total number of moles of a1) and alkanediol (a2) is 50 to 95 mol%.
- the molar ratio of alkanediol (a2) to the total number of moles of alkanediol (a1) and alkanediol (a2) is 50 to 95 mol%, preferably 55 to 90 mol%, more preferably 60 to 85 mol%. %.
- the molar ratio of alkanediol (a2) is larger than 95 mol%, the crystallinity of the polyurethane resin becomes too high, and the texture of the sheet-like product becomes worse.
- the molar ratio of alkanediol (a2) becomes smaller than 50 mol% the crystallinity of the polyurethane resin is lost, and the wear resistance of the sheet-like material is lowered.
- Alkanediol (a1) and alkanediol (a2) may be used singly or in plural. Further, as the alkanediol (a1) and alkanediol (a2), both linear alkanediols and branched alkanediols are used. From the viewpoints of chemical resistance, low temperature characteristics and durability, linear alkanediols are used. Preferably used.
- the number of branch points of the carbon chain is preferably 2 or less from the viewpoint of chemical resistance, low temperature characteristics and durability, Preferably it is 1.
- the number of carbons is preferably 2 or less, more preferably 1.
- Alkanediol (a1) has 3 to 5 carbon atoms, and when the number of carbon atoms is 2 or less, it is not easy to handle. When the carbon number is 6 or more, durability and mechanical strength are impaired.
- the number of carbon atoms of the alkanediol (a1) is preferably 3 or 4 because of easy availability.
- alkanediol (a1) examples include 1,3-propanediol, 1,2-propanediol, 2-methyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, -Methyl-1,4-butanediol, 1,5-pentanediol and the like. 1,3-propanediol, 1,4-butanediol and 1,5-pentanediol are preferred, and 1,4-butanediol is more preferred.
- the carbon number of the alkanediol (a2) is 8 to 20, and when the carbon number is 7 or less, the crystallinity of the copolymer polycarbonate diol (A1) becomes high, and the texture of the sheet-like material becomes hard.
- the number of carbon atoms is 21 or more, the crystallinity of the copolymer polycarbonate diol (A1) becomes too low, and the durability and wear resistance of the sheet-like product are impaired.
- the number of carbon atoms of alkanediol (a2) is preferably 8, 10 and 12 for ease of availability.
- alkanediol (a2) include 5-methyl-2,4-heptanediol, 2-methyl-1,7-heptanediol, 1,8-octanediol, 2-methyl-1,8-octanediol, 1, Examples include 9-nonanediol, 1,10-decanediol, 1,11-undecanediol, and 1,12-dodecanediol.
- 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol and 1,12-dodecanediol are preferable, and 1,10-decanediol is particularly preferable.
- the alkanediol (a1) and alkanediol (a2) are preferably derived from plants from the viewpoint of reducing environmental burden.
- Examples of plant-derived alkanediol (a1) include 1,3-propanediol, 1,4-butanediol, and 1,5-propanediol.
- the plant-derived alkanediol (a2) includes 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-dodecanediol, 1,13-tridecanediol, and 1 , 18-octadecanediol and the like.
- Plant-derived alkanediol (a1) and alkanediol (a2) include all those produced by the following production method.
- 1,4-butanediol succinic acid, succinic anhydride, succinic acid ester, maleic acid, maleic acid anhydride, maleic acid ester, tetrahydrofuran, ⁇ -butyrolactone, etc. obtained by fermentation
- 1,4-butanediol can be produced by synthesis, or 1,4-butanediol can be produced directly by fermentation, and 1,4-butane can be produced from 1,3-butadiene obtained by fermentation.
- Diols can also be produced.
- a method of directly producing 1,4-butanediol by a fermentation method and a method of obtaining 1,4-butanediol by hydrogenating succinic acid with a reduction catalyst are efficient and preferably used.
- 3-hydroxypropionaldehyde is produced from glycerol, glucose, and other saccharides by fermentation, and then converted to 1,3-propanediol. From 1,3 propanediol directly by fermentation.
- 1,10-decanediol it can be synthesized by synthesizing sebacic acid from castor oil by alkali melting and hydrogenating directly or after the esterification reaction.
- the plant-derived ratio is a theoretical value obtained by calculating the ratio of plant-derived carbon and fossil fuel-derived carbon by conducting a radiocarbon (C14) concentration analysis according to the biobase concentration test standard defined in ASTM D6866. As required.
- the copolymerized polycarbonate diol (A1) used in the present invention is crystalline, and can be expressed by the heat of fusion ( ⁇ H) of the melting peak obtained by a melting point measurement method using a differential operation calorimeter defined in JIS K 7121-1987,
- the heat of fusion is preferably 40 to 100 J / g, more preferably 45 to 90 J / g, and still more preferably 50 to 75 J / g.
- the heat of fusion ( ⁇ H) is 40 J / g or more, durability and wear resistance can be expressed, and when it is 100 J / g or less, the texture is improved.
- Polycarbonate diol (A2) can be used for the polyurethane resin (D) used in the present invention.
- the polycarbonate diol (A2) is a polycarbonate diol having a structural unit derived from an alkanediol (a3) preferably having 4 to 6 carbon atoms and having a heat of fusion ( ⁇ H) defined above of 0 J / g.
- the polycarbonate diol (A2) may or may not be a copolymer, but a copolymer is a preferred embodiment.
- the alkanediol (a3) preferably has 4 to 6 carbon atoms.
- the carbon number is 4 or more
- the polycarbonate diol (A2) has low crystallinity
- the sheet-like material has a soft texture
- the carbon number is low.
- the crystallinity of the copolymerized polycarbonate diol (A2) is maintained, and the durability and abrasion resistance of the sheet-like material can be expressed.
- Alkanediol (a3) can be used singly or in plural.
- alkanediol (a3) having 4 to 6 carbon atoms examples include 1,4-butanediol, 1,5-pentanediol, 2-methyl-1,3-propanediol, neopentyl glycol, and 1,6-hexanediol.
- 3-methyl-1,5-pentanediol and mixed diols of two or more of these more preferably 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 3- Methyl-1,5-pentanediol and a mixed diol of two or more of these are preferable, and 1,6-hexanediol, 3-methyl-1,5-pentanediol and a mixed diol thereof are most preferable.
- Polycarbonate diol (A2) is amorphous, and this can be confirmed by the fact that no melting peak is observed by the melting point measurement method using the differential operation calorimeter defined in JIS K 7121-1987. If the polycarbonate diol (A2) is crystalline, the texture of the sheet-like material may be impaired.
- the ratio of the amorphous polycarbonate diol (A2) is determined such that the ratio of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2) does not inhibit the crystallization of the copolymerized polycarbonate diol (A1).
- the melting point (Tm) obtained by the melting point measurement method defined in JIS K 7121-1987, which is a copolymer (A12) of a copolymer polycarbonate diol (A1) and a polycarbonate diol (A2), and a copolymer
- the difference ( ⁇ Tm) in the melting point (Tm) of the polycarbonate diol (A1) is 1.5 ° C. or less, preferably 1.0 ° C. or less, more preferably 0.8 ° C. or less. By setting the difference ( ⁇ Tm) in the melting point (Tm) to 1.5 ° C. or less, durability and wear resistance can be expressed.
- the ratio of the copolymerized polycarbonate diol (A1) to the polycarbonate diol (A2) is such that the heat of fusion ( ⁇ H) of the mixture (A12) of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2) is 10 to 55 J / g.
- the range is preferable from the viewpoint of texture, durability and wear resistance, more preferably in the range of 20 to 50 J / g, and still more preferably in the range of 25 to 45 J / g.
- the molar ratio of copolymer polycarbonate diol (A1) to the total number of moles of copolymer polycarbonate diol (A1) and polycarbonate diol (A2) is preferably 30 to 80 mol%, more preferably 40 to 70 mol%. . If the molar ratio of the copolymerized polycarbonate diol (A1) is 30 mol% or more, the durability of the sheet-like material is good, and if it is 80 mol% or less, the texture of the sheet-like material is good.
- the number average molecular weight of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2) is preferably 500 or more, more preferably 700 or more, and still more preferably 1000 or more from the viewpoint of texture.
- the number average molecular weight is preferably 5000 or less, more preferably 4500 or less, and further preferably 4000 or less from the viewpoint of strength.
- the number average molecular weight of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2) is determined from the hydroxyl value.
- the hydroxyl value is measured by the method specified in JIS K 0070-1992 (potentiometric titration method).
- Examples of the method for producing the copolymer polycarbonate diol (A1) and the polycarbonate diol (A2) include a transesterification method of a carbonate ester such as diphenyl carbonate and dimethyl carbonate with a diol. Details can be found, for example, in U.S. Pat. No. 4,103,702, U.S. Pat. No. 4,105,641, and by Schnell, Polymer Reviews, Volume 9, Pages 9-20 (1964). The various methods described are mentioned. U.S. Pat. No. 4,013,702 and U.S. Pat. No. 4,105,641 describe the synthesis of copolymerized polycarbonate diols of 1,6-hexanediol and 1,4-butanediol. These all disclose a method for producing a copolymerized polycarbonate diol.
- copolymerized polycarbonate diol (A1) examples include 1,8-octanediol / 1,3-propanediol copolymerized polycarbonate diol, 1,8-octanediol / 1,4-butanediol copolymerized polycarbonate diol, 8-octanediol / 1,5-pentanediol copolymer polycarbonate diol, 1,9-nonanediol / 1,3-propanediol copolymer polycarbonate diol, 1,9-nonanediol / 1,4-butanediol copolymer polycarbonate Diol, 1,9-nonanediol / 1,5-pentanediol copolymerized polycarbonate diol, 1,10-decanediol / 1,3-propanediol copolymerized polycarbon
- preferable copolymerized polycarbonate diol (A1) includes 1,8-octanediol / 1,4-butanediol copolymerized polycarbonate diol, 1,9-nonanediol / 1,4-butanediol copolymerized polycarbonate diol, 1,10-decanediol / 1,4-butanediol copolymerized polycarbonate diol, 1,12-dodecanediol / 1,4-butanediol copolymerized polycarbonate diol and mixed copolymer polycarbonate diols of two or more of these.
- Particularly preferred copolymer polycarbonate diol (A1) is 1,10-decanediol / 1,4-butanediol copolymer polycarbonate diol.
- polycarbonate diol (A2) examples include homopolymers such as 2-methyl-1,3-propanediol polycarbonate diol, neopentyl glycol polycarbonate diol, 2-ethyl-1,3-propanediol polycarbonate diol, Examples thereof include 3-methyl-1,5-pentanediol polycarbonate diol and the like, and two or more mixed polycarbonate diols thereof.
- copolymer examples include 1,4-butanediol / 1,5-pentanediol copolymerized polycarbonate diol, 1,4-butanediol / 1,6-hexanediol copolymerized polycarbonate diol, 1,5-butanediol, Pentanediol / 1,6-hexanediol copolymer polycarbonate diol, 2-methyl-1,3-propanediol / 1,6-hexanediol copolymer polycarbonate diol, neopentyl glycol / 1,6-hexanediol copolymer Polycarbonate diol, 3-methyl-1,5-pentanediol / 1,6-hexanediol copolymerized polycarbonate diol, 2-ethyl-1,3-propanediol / 1,6-hexanedio
- 2 or more types of mixed weight Include the polycarbonate diol.
- preferred copolymers are 1,5-pentanediol / 1,6-hexanediol copolymer polycarbonate diol, neopentyl glycol / 1,6-hexanediol copolymer polycarbonate diol, 2-ethyl-1, 3-propanediol / 1,6-hexanediol copolymer polycarbonate diol, 3-methyl-1,5-pentanediol / 1,6-hexanediol copolymer polycarbonate diol, and a mixture copolymer polycarbonate diol of two or more of these
- a particularly preferred copolymer is 3-methyl-1,5-pentanediol / 1,6-hexanediol copolymer polycarbonate diol.
- the diol component of the polyurethane resin (D) used in the present invention in addition to the copolymer polycarbonate diol (A1) and the polycarbonate diol (A2), another polymer diol (A4) is used in a range that does not adversely affect the performance. Can do.
- the polymer diol (A4) is preferably used in an amount of 0 to 40 mol%, more preferably 5 to 35 mol%, based on the total number of moles of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2). .
- polymer diol (A4) examples include polyether diol and polyester diol, and the number average molecular weight is preferably 500 to 5,000, more preferably 1,000 to 4,000.
- polyether diol examples include a compound having a structure in which an alkylene oxide (hereinafter sometimes abbreviated as AO) is added to a low molecular diol, and a mixture of two or more of these.
- AO alkylene oxide
- low molecular diol examples include ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, neopentyl glycol, 1,6-hexanediol, and 3-methyl-1,5-pentane.
- Diols low molecular diols having a ring structure [bis (hydroxymethyl) cyclohexane, bis (hydroxyethyl) benzene, ethylene oxide adduct of bisphenol A, etc.], and mixtures of two or more of these.
- EO ethylene oxide
- PO propylene oxide
- THF tetrahydrofuran
- 3-M-THF 3-methyl-tetrahydrofuran
- AO may be used alone or in combination of two or more. In the case of using a plurality of AOs, block addition, random addition, or a mixture of both can be used. Of these AOs, preferred AOs are EO alone, PO alone, THF alone, 3-M-THF alone, PO and EO in combination, PO and / or EO and THF, and THF and 3-M-THF. (In the case of combination, random, block, and a mixture of both).
- polyether diol examples include polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol (hereinafter sometimes abbreviated as PTMG), poly-3-methyl-tetramethylene ether glycol, THF / EO copolymer diol. , And THF / 3-M-THF copolymerized diol.
- PTMG polytetramethylene ether glycol
- THF / EO copolymer diol a particularly preferred polyether diol
- a particularly preferred polyether diol is PTMG.
- the addition of AO to the low molecular diol can be performed by a usual method. For example, it is carried out in a single step or in multiple steps under normal pressure or under pressure, in the presence of a catalyst (in the latter stage of AO addition) in the presence of a catalyst (an alkali catalyst, an amine catalyst or an acidic catalyst).
- a catalyst an alkali catalyst, an amine catalyst or an acidic catalyst.
- polyester diol examples include polyester diols obtained by reacting low molecular diols and / or polyether diols having a molecular weight of 1000 or less and dicarboxylic acids, and polylactone diols obtained by ring-opening polymerization of lactones.
- low molecular diol examples include ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, neopentyl glycol, 1,6-hexanediol, 3-methyl-1,5-pentanediol; Low molecular diols having a ring structure [bis (hydroxymethyl) cyclohexane, bis (hydroxyethyl) benzene, ethylene oxide adduct of bisphenol A, etc.], and mixtures of two or more of these.
- dicarboxylic acid examples include aliphatic dicarboxylic acids such as succinic acid, adipic acid, azelaic acid and sebacic acid, aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and phthalic acid, and ester-forming derivatives of these dicarboxylic acids [ Acid anhydrides and lower alkyl (C1-4) esters, etc.] and mixtures of two or more thereof.
- lactone include ⁇ -caprolactone, ⁇ -butyrolactone, ⁇ -valerolactone, and a mixture of two or more thereof.
- the polyester diol can be produced by a usual method, for example, a method in which a low molecular diol and a dicarboxylic acid are subjected to a condensation reaction, or a lactone is added to an initiator (low molecular diol).
- low molecular weight diol examples include polyethylene adipate diol, polybutylene adipate diol, polyneopentyl adipate diol, polyhexamethylene adipate diol, polyethylene butylene adipate diol, polydiethylene adipate diol, polybutylene sebacate diol, and polycaprolactone Examples include diols.
- the organic diisocyanate (B) used in the present invention includes aromatic diisocyanates having 6 to 20 carbon atoms (excluding carbon in the NCO group, the same shall apply hereinafter), aliphatic diisocyanates having 2 to 18 carbon atoms, carbon numbers Is an alicyclic diisocyanate having 4 to 15 carbon atoms, an araliphatic diisocyanate having 8 to 15 carbon atoms, a modified product of these diisocyanates (carbodiimide-modified product, urethane-modified product, uretdione-modified product, etc.) and two or more kinds thereof. Mixtures and the like are included.
- aromatic diisocyanates include 1,3- and / or 1,4-phenylene diisocyanate, 2,4- and / 2,6-tolylene diisocyanate, 2,4′- and / or 4,4′-.
- Diphenylmethane diisocyanate hereinafter abbreviated as MDI
- 4,4′-diisocyanatobiphenyl 4,4′-diisocyanatobiphenyl, 3,3′-dimethyl-4,4′-diisocyanatobiphenyl, 3,3′-dimethyl-4,4′-diisocyanate
- natodiphenylmethane and 1,5-naphthylene diisocyanate natodiphenylmethane and 1,5-naphthylene diisocyanate.
- aliphatic diisocyanate examples include ethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, dodecamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, lysine diisocyanate, 2,6-diisocyanatomethylcaproate, bis (2-isocyanatoethyl) carbonate, 2-isocyanatoethyl-2,6-diisocyanatohexaate and the like.
- alicyclic diisocyanate examples include isophorone diisocyanate, dicyclohexylmethane-4,4′-diisocyanate, cyclohexylene diisocyanate, methylcyclohexylene diisocyanate, bis (2-isocyanatoethyl) -4-cyclohexylene-1,2- Examples include dicarboxylate, and 2,5- and / or 2,6-norbornane diisocyanate.
- araliphatic diisocyanate examples include m- and / or p-xylylene diisocyanate, ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylxylylene diisocyanate, and the like.
- a preferred diisocyanate is an aromatic diisocyanate, and a particularly preferred aromatic diisocyanate is MDI.
- water such as ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol and neopentyl glycol can be used.
- alicyclic diols such as 1,4-bis (hydroxymethyl) cyclohexane, aromatic diols such as 1,4-bis (hydroxyethyl) benzene, aliphatic diamines such as ethylenediamine, and alicyclics such as isophorone diamine Diamines, aromatic diamines such as 4,4-diaminodiphenylmethane, araliphatic diamines such as xylenediamine, alkanolamines such as ethanolamine, dihydrazides such as hydrazine and adipic acid dihydrazide, and mixtures of two or more of these It is below.
- preferred chain extenders (C) are water, low-molecular diols, and aromatic diamines, more preferably water, ethylene glycol, 1,4-butanediol, 4,4′-diaminodiphenylmethane, and 2 A mixture of seeds or more can be mentioned.
- the number average molecular weight of the chain extender (C) is preferably 250 or less.
- the ratio of the organic diisocyanate (B) is equal to the total amount of active hydrogen groups comprising the copolymerized polycarbonate diol (A1), the polycarbonate diol (A2) and the chain extender (C).
- the equivalent ratio is preferably 0.95 or more and 1.1 or less, more preferably 0.97 or more and 1.05 or less.
- the ratio of the active hydrogen groups of the chain extender (C) is preferably 0.2 or more and 10 or less with respect to the total amount of active hydrogen groups of the copolymerized polycarbonate diol (A1) and the polycarbonate diol (A2). Preferably they are 0.5 or more and 5 or less.
- the production method of the polyurethane resin (D) of the present invention is preferably a one-shot method in which, for example, a polycarbonate diol (A), an organic diisocyanate (B) and a chain extender (C) are reacted simultaneously, or a polycarbonate diol (A). And a prepolymer method in which an organic diisocyanate (B) is first reacted to obtain a urethane prepolymer, and then a chain extender (C) is further reacted.
- the reaction temperature of the urethanization reaction is preferably 20 to 160 ° C, more preferably 40 to 80 ° C.
- polymerization terminators such as monoalcohols (such as methanol, ethanol, butanol and cyclohexanol), and monoamines (such as diethylamine, dibutylamine and cyclohexylamine) can be used.
- a catalyst that is preferably used for the urethanation reaction such as an amine catalyst (triethylamine, triethylenediamine, etc.) or a tin catalyst (dibutyltin dilaurate, dioctyltin dilaurate, etc.) is used.
- an amine catalyst triethylamine, triethylenediamine, etc.
- a tin catalyst dibutyltin dilaurate, dioctyltin dilaurate, etc.
- the usage-amount of a catalyst is 1 mass% or less with respect to a polyurethane resin (D).
- the production of the polyurethane resin (D) used in the present invention is carried out in the presence or absence of an organic solvent. When it is carried out in the absence, an organic solvent is added later or a solid resin is once added. After the production, it can be carried out by a method of dissolving in a solvent.
- Examples of the organic solvent (G) used in the production of the polyurethane resin (D) include amide solvents [N, N-dimethylformamide (hereinafter abbreviated as DMF), N, N-dimethylacetamide, N-methylpyrrolidone, etc.]; Sulfoxide solvents [dimethyl sulfoxide (hereinafter sometimes abbreviated as DMSO), etc.]: ketone solvents (methyl ethyl ketone, etc.); ether solvents (dioxane, THF, etc.); ester solvents (methyl acetate, ethyl acetate, acetic acid) Butyl, etc.); aromatic solvents (toluene, xylene, etc.), and mixtures of two or more thereof.
- a preferred solvent is an amide solvent, and particularly preferred is DMF.
- colorants such as titanium oxide, UV absorbers (benzophenone, benzotriazole, etc.) and antioxidants [4,4-butylidenebis (3-methyl-6-butylphenol)
- Hindered phenols such as; organic phosphites such as triphenyl phosphite and trichloroethyl phosphite]
- inorganic fillers such as calcium carbonate
- known coagulation regulators higher alcohols; cetyl alcohol, stearyl Alcohols (JP-B-42-22719), crystalline organic compounds; purified octadecyl alcohol, purified stearyl alcohol, etc.
- JP-B 56-41652 hydrophobic nonionic surfactants; sorbitan monostears Rate, sorbitan pal Such as Tate like (JP-B 45-39634 JP and Sho 45-39635 Patent Publication)] can be added.
- the total addition amount (content) of these additives is preferably 10% by mass or less, more preferably 0.5 to 5% by mass with respect to the polyurethane resin (D).
- the solidification value (gelation point) of the polyurethane resin (D) used in the present invention is preferably 2 ml or more, more preferably 2.3 ml or more, further preferably 2.5 ml or more, from the viewpoint of the solidification rate. It is.
- the coagulation value (gel point) is preferably 5 ml or less, more preferably 4.7 ml or less, and even more preferably 4.5 ml or less.
- the solidification value (gelation point) is that a 1% by mass DMF solution of polyurethane resin is prepared, and water at a temperature of 25 ° C. is dropped while stirring with a stirrer while adjusting the temperature of 100 g of this solution to 25 ° C. At this time, the amount of water (ml) required for the solution (transparent solution) to become cloudy.
- the coagulation value represents the degree of hydrophilicity of the polyurethane resin, and is an index of the coagulation rate of the polyurethane resin when the polyurethane resin solution is applied to the substrate and wet coagulated.
- gelation point represents the degree of hydrophilicity of the polyurethane resin, and is an index of the coagulation rate of the polyurethane resin when the polyurethane resin solution is applied to the substrate and wet coagulated.
- the use of a highly hydrophobic polymer diol reduces the coagulation value of the polyurethane resin
- the use of a highly hydrophilic polymer diol increases the coagulation value of the polyurethane resin.
- the number average molecular weight of the polyurethane resin (D) is preferably 20,000 or more from the viewpoint of resin strength, and is preferably 500,000 or less from the viewpoint of viscosity stability and workability.
- the number average molecular weight is more preferably 30,000 or more and 150,000 or less.
- the number average molecular weight of the polyurethane resin (D) can be determined by gel permeation chromatography, and is measured, for example, under the following conditions. ⁇ Equipment: HLC-8220 manufactured by Tosoh Corporation ⁇ Column: Tosoh TSKgel ⁇ -M ⁇ Solvent: DMF ⁇ Temperature: 40 °C Calibration: polystyrene.
- a polyurethane resin (D1) having a compound (A3) having a hydrophilic group and active hydrogen as an essential constituent monomer is a polyurethane resin aqueous solution containing the polyurethane resin (D1) and water. It is suitably used as a dispersion (P).
- the mass proportion of the compound (A3) having a hydrophilic group and active hydrogen is based on the total mass of the copolymer polycarbonate diol (A1), the polycarbonate diol (A2) and the compound (A3) having a hydrophilic group and active hydrogen,
- the content is preferably 0.5 to 14% by mass, more preferably 0.8 to 10% by mass, and particularly preferably 1 to 7% by mass.
- the hydrophilic group of the compound (A3) having a hydrophilic group and active hydrogen refers to a carboxyl group, a carboxylate group, a sulfo group, a sulfonate group, and a sulfamic acid group.
- active hydrogen refers to active hydrogen other than a carboxyl group and a sulfo group.
- Examples of the compound (A3) having a hydrophilic group and active hydrogen include, for example, a compound having a carboxyl group and having 2 to 10 carbon atoms [dialkylol alkanoic acid (for example, 2,2-dimethylolpropionic acid, 2,2-diionic).
- amino acids for example, glycine, alanine and valine
- compounds having 2 to 16 carbon atoms having a sulfo group [ 3- (2,3-dihydroxypropoxy) -1-propa
- preferred compounds (A3) having a hydrophilic group and active hydrogen are compounds having a carboxyl group and a carboxylate group.
- 2,2-dimethylolpropionic acid and 2,2-dimethylolbutane are particularly preferred.
- An acid is preferably used.
- the total content of carboxyl groups and carboxylate groups in the polyurethane resin (D1) depends on the mass of the polyurethane resin (D1) from the viewpoints of the stability of the aqueous dispersion (P), the heat resistance and weather resistance of the resulting film. Based on this, it is preferably 0.09 to 0.27 mmol / g, more preferably 0.14 to 0.25 mmol / g.
- the mass proportion of the compound (A3) having a hydrophilic group and active hydrogen is determined based on the copolymer polycarbonate diol (A1), the polycarbonate diol (A2), and the hydrophilic group.
- the polyurethane resin (D1) is synthesized so as to be about 1.0 to 10.0% by mass with respect to the total mass of the compound (A3) having active hydrogen.
- the total content of carboxyl groups and carboxylate groups in the polyurethane resin in the present invention is such that 3 to 10 g of the polyurethane resin aqueous dispersion (P) is heated and dried at 130 ° C. for 45 minutes, and then the residue is washed with water. It can be calculated from the acid value measured again by the method described in JIS K 0070: 1992 (potentiometric titration method) after heating and drying again at a temperature of 130 ° C. for 45 minutes, dissolving in dimethylformamide.
- Examples of the neutralizing agent used in the neutralized salt of the compound (A3) having a hydrophilic group and active hydrogen include hydroxylation of ammonia, an amine compound having 1 to 20 carbon atoms, and an alkali metal (sodium, potassium, lithium, etc.). Things.
- Examples of amine compounds having 1 to 20 carbon atoms include primary amines such as monomethylamine, monoethylamine, monobutylamine, monoethanolamine, and 2-amino-2-methyl-1-propanol, dimethylamine, diethylamine, dibutylamine, and diethanolamine. And secondary amines such as N-methyldiethanolamine and tertiary amines such as trimethylamine, triethylamine, dimethylethylamine and triethanolamine.
- preferred amine compounds from the viewpoint of the odor of the aqueous dispersion (P) and the water resistance of the resulting film are amine compounds having a low vapor pressure at a temperature of 25 ° C., and more preferred amine compounds are triethylamine, Ethanolamine, diethanolamine and N-methyldiethanolamine.
- the polyurethane resin aqueous dispersion (P) can contain a surfactant (E), a crosslinking agent (F) and a weathering stabilizer in the polyurethane resin (D1) containing water as necessary.
- surfactant (E) examples include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and other emulsifying dispersants. Each may be used alone or in combination of two or more.
- the content of the surfactant (E) is preferably 0 to 20% by mass, more preferably 0.1 to 10% by mass, based on the mass of the polyurethane resin (D1), from the viewpoint of water resistance of the dry film. %, Particularly preferably 0.2 to 5% by mass.
- the crosslinking agent (F) is a water-soluble or water-dispersible compound containing two or more functional groups capable of reacting with a carboxyl group in the polyurethane skeleton in the molecule, and also a functional group capable of reacting with the carboxyl group. Examples thereof include a carbodiimide group, an oxazoline group, an epoxy group, a cyclocarbonate group, and an aziridine group.
- a crosslinking agent (F) can be used individually by 1 type, and can also use 2 or more types together. The amount of these crosslinking agents to be used is 1.0 to 20% by mass, more preferably 1.5 to 10% by mass, based on the mass of the polyurethane resin (D1).
- Weather resistance stabilizers include antioxidants (hindered phenols, sulfurs, phosphoruss, etc.), UV absorbers (benzotriazoles, triazines, benzophenones, benzoates, etc.), hindered amine light stabilizers, etc.
- a weathering stabilizer can be contained. The use amount of these weather resistance stabilizers is preferably 0.1 to 10% by mass, more preferably 0.2 to 5% by mass, based on the mass of the polyurethane resin (D1).
- the volume average particle diameter of the aqueous polyurethane resin dispersion (P) is preferably from 0.01 to 1 ⁇ m, more preferably from 0.02 to 0.7 ⁇ m, particularly preferably from the viewpoint of storage stability and viscosity. 0.03 to 0.5 ⁇ m.
- the solid content concentration of the aqueous polyurethane resin dispersion (P) used in the present invention is preferably 20 to 70% by mass, more preferably 30 to 60% by mass.
- Examples of the method for producing the aqueous polyurethane resin dispersion (P) include the following methods [1] and [2].
- a polyurethane resin (D1) is formed in a single stage or multiple stages, neutralized with a neutralizer with a hydrophilic group introduced by a compound (A3) having a hydrophilic group and active hydrogen.
- a method of dispersing in an aqueous medium in the absence and distilling off the organic solvent if necessary.
- the prepolymer in the production method [1] is formed by reacting at a ratio such that the equivalent ratio of isocyanate group / active hydrogen-containing group is 1.01 to 2.0.
- the prepolymer is formed by a reaction at a temperature of 20 ° C. to 150 ° C., preferably 60 ° C. to 110 ° C., and the reaction time is 2 to 15 hours.
- the formation of the prepolymer can be carried out in the presence or absence of an organic solvent substantially nonreactive with isocyanate groups.
- the prepolymer after the reaction contains 0.5 to 5% free isocyanate groups.
- the organic solvent used in the above reaction has a boiling point of less than 100 ° C. and is substantially non-reactive with isocyanate groups (for example, ketones such as ethyl methyl ketone and acetone, methyl acetate, ethyl acetate and the like). Esters, acetonitrile, tetrahydrofuran, etc.).
- isocyanate groups for example, ketones such as ethyl methyl ketone and acetone, methyl acetate, ethyl acetate and the like. Esters, acetonitrile, tetrahydrofuran, etc.
- a catalyst used in a normal urethanization reaction can be used as necessary to promote the reaction.
- the catalyst include triethylamine, N-ethylmorpholine, triethylenediamine, and cycloamidines described in US Pat. No. 4,524,104 [1,8-diaza-bicyclo (5,4,0) undecene-7 (Sanapro ⁇ Amine catalysts such as dibutyltin dilaurate, dioctyltin dilaurate and tin octylate, titanium catalysts such as tetrabutyl titanate, and bismuth such as bismuth trioctylate And system catalysts.
- the elastic resin used in the present invention is preferably a porous structure in the sheet-like material.
- the proportion of fine pores having a pore diameter of 0.1 to 20 ⁇ m in all pores of the porous structure is preferably 60% or more.
- the proportion of the fine holes is more preferably 65% or more, and further preferably 70% or more.
- the porous structure can also employ communication holes and closed cells. Thus, by having a micropore in a certain ratio or more in the elastic resin, the flexibility of the elastic resin can be increased, and the sheet-like material can have a soft texture.
- the elastic resin into a porous structure having fine pores, when bending deformation is applied to the sheet-like material, the deformation force is distributed not over a part of the elastic resin but over the entire elastic resin. Since it can receive, generation
- the hole diameter of 60% or more is preferably 0.1 ⁇ m or more, more preferably 0.5 ⁇ m or more, and further preferably 1 ⁇ m or more.
- the diameter of 60% or more of all the pores of the porous structure of the elastic resin is preferably 20 ⁇ m or less, more preferably 15 ⁇ m or less, and even more preferably 10 ⁇ m or less.
- the pore diameter of the porous structure can be increased, both flexibility and appropriate strength can be achieved, and deformation force can be received by the entire elastic resin.
- a sheet-like material having excellent flexibility and crease resistance can be obtained.
- the elastic resin used in the present invention holds the ultrafine fibers in the sheet-like material, and preferably exists in the internal space of the nonwoven fabric from the viewpoint of having napped on at least one side of the sheet-like material. This is a preferred embodiment.
- ultrafine fiber expression type fiber is a sea-island type in which two-component thermoplastic resins with different solubility in solvent are used as sea component and island component, and only the sea component is dissolved and removed using solvent etc.
- Adopt peelable composite fiber or multilayer composite fiber that splits into ultrafine fibers by alternately arranging composite fibers or two-component thermoplastic resin in a radial or layered cross section of the fiber and separating and separating each component
- sea-island type composite fibers are preferably used.
- sea component of the sea-island composite fiber examples include polyolefins such as polyethylene and polypropylene, copolymerized polyesters such as polystyrene, sodium sulfoisophthalate and polyethylene glycol, polylactic acid, polyvinyl alcohol, and copolymers thereof. It is done.
- the fiber ultrafine treatment (sea removal treatment) of the sea-island composite fiber can be performed by immersing the sea-island composite fiber in a solvent and squeezing it.
- a solvent for dissolving the sea component an organic solvent such as toluene or trichlorethylene, an alkaline aqueous solution such as sodium hydroxide, or hot water can be used.
- devices such as a continuous dyeing machine, a vibro-washer type seawater removal machine, a liquid dyeing machine, a Wins dyeing machine, and a jigger dyeing machine can be used.
- the sea component can be dissolved and removed at any timing before and after the elastic resin is applied.
- the elastic resin is in close contact with the ultrafine fibers so that the ultrafine fibers can be strongly gripped, so that the wear resistance of the sheet-like material becomes better.
- sea removal treatment is performed after application of the elastic resin, voids due to the sea component removed from the sea are generated between the elastic resin and the ultrafine fibers, so the elastic resin does not directly grip the ultrafine fibers.
- the texture of the sheet is flexible.
- the mass ratio of the sea component is less than 10% by mass, the island component is not sufficiently thinned. Further, when the mass ratio of the sea component exceeds 80 mass%, the productivity is lowered because the ratio of the eluted component is large.
- an ultrafine fiber expression type fiber typified by a sea-island type composite fiber
- Any method can be employed, such as. Stretching can be appropriately performed by a method of stretching in one to three stages by wet heat, dry heat, or both.
- the stretched sea-island type composite fiber is preferably crimped and cut into a predetermined length to obtain a raw nonwoven fabric.
- a usual method can be used for crimping and cutting.
- the composite fiber such as the sea-island type composite fiber used in the present invention is preferably given buckling crimp. This is because buckling crimps improve the entanglement between the fibers when a short fiber nonwoven fabric is formed, and enables high density and high entanglement.
- a normal stuffing box type crimper is preferably used, but in order to obtain a preferable crimp retention coefficient in the present invention, the processing fineness, crimper temperature, crimper weight and It is a preferable aspect to adjust the indentation pressure and the like as appropriate.
- the crimp retention coefficient of the ultrafine fiber-expressing fiber to which buckling crimp is applied is preferably in the range of 3.5 to 15, more preferably in the range of 4 to 10.
- the crimp retention coefficient is 3.5 or more, the rigidity in the thickness direction of the nonwoven fabric is improved when the nonwoven fabric is formed, and the entanglement property in the entanglement process such as needle punching can be maintained. Further, by setting the crimp retention coefficient to 15 or less, the fiber web is excellent in fiber opening in carding without excessive crimping.
- crimp retention coefficient (W / L-L0) / 2 W: Crimp extinction load (load when crimp is fully extended: mg / dtex) L: Fiber length under crimp extinction load (cm) L0: fiber length (cm) under 6 mg / dtex. Mark 30.0 cm.
- a load of 100 mg / dtex is applied to the sample, and then the load is increased in increments of 10 mg / dtex to confirm the state of crimping.
- a load is applied until the crimp is fully extended, and the length of the marking (elongation from 30.0 cm) in a state where the crimp is fully extended is measured.
- the single fiber fineness of the composite fiber used in the present invention is preferably in the range of 2 to 10 dtex, more preferably in the range of 3 to 9 dtex, from the viewpoint of entanglement such as a needle punching process.
- the composite fiber used in the production of the sheet-like product of the present invention preferably has a shrinkage of 5 to 40% at a temperature of 98 ° C., more preferably 10 to 35%.
- the shrinkage rate within this range, the fiber density can be improved by hot water treatment, and a sense of fulfillment like genuine leather can be obtained.
- the shrinkage rate is measured by first applying a load of 50 mg / dtex to a bundle of composite fibers and marking 30.0 cm (L0). Then, it is treated in hot water at a temperature of 98 ° C. for 10 minutes, the length (L1) before and after the treatment is measured, and [(L0 ⁇ L1) / L0] ⁇ 100 is calculated. The measurement is carried out three times, and the average value is taken as the shrinkage rate.
- the number of fibers in the ultrafine fiber bundle is preferably 8 to 1000 fibers / bundle, more preferably 10 to 800 fibers / bundle.
- the number of fibers is 8 / bundle or more, the fineness of the ultrafine fibers is good and, for example, there is a tendency to exhibit mechanical properties such as wear.
- the number of fibers is 1000 / bundle or less, the spreadability at the time of napping is good, the fiber distribution on the napped surface is uniform, and good product quality is obtained.
- a method for obtaining a nonwoven fabric which is a fiber entangled body constituting the sheet-like material of the present invention a method of entanglement of a composite fiber web with a needle punch or a water jet punch, a spunbond method, a melt blow method, a paper making method, etc.
- a method of undergoing a treatment such as needle punching or water jet punching is preferably used in order to obtain the above-described ultrafine fiber bundle mode.
- the non-woven fabric may be formed by laminating and integrating the non-woven fabric and the woven or knitted fabric, and a method of integrating these by needle punch, water jet punch or the like is preferably used.
- the number of needle barbs is preferably 1-9. By using one or more needle barbs, efficient fiber entanglement becomes possible. On the other hand, by making the needle barb preferably 9 or less, fiber damage can be suppressed.
- the number of composite fibers caught on the barb is determined by the shape of the barb and the diameter of the composite fiber. Therefore, the barb shape of the needle used in the needle punching process has a kick-up of 0-50 ⁇ m, an undercut angle of 0-40 °, a throat depth of 40-80 ⁇ m, and a throat length of 0.5. Those having a thickness of ⁇ 1.0 mm are preferably used.
- the number of punching is preferably 1000 to 8000 / cm 2 .
- By punching number is preferably at 1000 / cm 2 or more, it is possible to denseness obtain finishing precision obtained.
- the number of punching is preferably 8000 / cm 2 or less, deterioration of workability, fiber damage, and strength reduction can be prevented.
- water jet punching process it is preferable to perform the water in a columnar flow state. Specifically, it is a preferred embodiment that water is ejected from a nozzle having a diameter of 0.05 to 1.0 mm at a pressure of 1 to 60 MPa.
- the apparent density of the nonwoven fabric after the needle punching process or water jet punching process is preferably 0.15 to 0.45 g / cm 3 .
- the apparent density preferably 0.15 g / cm 3 or more, the sheet-like product can have sufficient form stability and dimensional stability.
- the apparent density is preferably 0.45 g / cm 3 or less, a sufficient space for applying the elastic resin can be maintained.
- the non-woven fabric obtained in this way is a preferred embodiment from the viewpoint of densification, shrinking by dry heat or wet heat or both, and further densification.
- the nonwoven fabric can be compressed in the thickness direction by calendaring or the like.
- the polyurethane resin which is an elastic resin, is applied to the nonwoven fabric.
- the polyurethane resin can be applied to either a nonwoven fabric made of a composite fiber or a nonwoven fabric made into ultrafine fibers.
- the polyurethane solvent is an organic solvent
- it can be coagulated by dry heat coagulation, wet coagulation, or a combination thereof, but wet coagulation by solidifying by immersion in water is particularly preferred.
- wet coagulation the polyurethane resin does not concentrate at the entanglement point of the ultrafine fibers, and the polyurethane resin itself becomes porous, so the degree of freedom between the ultrafine fibers is increased and a flexible sheet-like material can be obtained.
- the polyurethane resin dispersion medium is water, it can be solidified by dry heat coagulation, wet heat coagulation, or a combination thereof.
- the sheet-like material of the present invention has napping on at least one surface of the sheet-like material.
- the raising treatment for forming napped fibers of the ultrafine fibers on the surface of the sheet-like material of the present invention can be performed by a grinding method using a sandpaper or a roll sander.
- a lubricant such as a silicone emulsion can be applied to the sheet-like material.
- the sheet-like material can be dyed depending on the application.
- a method for dyeing a sheet-like material it is preferable to use a liquid dyeing machine because the sheet-like material can be softened by simultaneously giving a stagnation effect. If the dyeing temperature of the sheet-like material is too high, the elastic resin may be deteriorated. On the other hand, if it is too low, the dyeing to the fiber becomes insufficient.
- the dyeing temperature is preferably 80 to 150 ° C, more preferably 110 to 130 ° C.
- Dye can be selected according to the type of fiber constituting the sheet.
- disperse dyes can be used for polyester fibers
- acidic dyes or metal-containing dyes can be used for polyamide fibers, and combinations thereof can be used.
- a dyeing assistant when dyeing the sheet-like material.
- a dyeing assistant By using a dyeing assistant, the uniformity and reproducibility of dyeing can be improved.
- a finishing treatment using a softening agent such as silicone, an antistatic agent, a water repellent, a flame retardant, a light proofing agent, and an antibacterial agent can be performed in the same bath or after dyeing.
- Sheets of the present invention include furniture, chairs and wall coverings, seats in vehicle interiors such as automobiles, trains and airplanes, skin materials such as ceilings and interiors, interior materials having a very elegant appearance, and clothing and industrial It can be suitably used as a material or the like.
- MFR Melt flow rate of polyester: 4-5 g of sample pellets are placed in a cylinder of an MFR meter electric furnace, and the amount of resin extruded in 10 minutes using a Toyo Seiki melt indexer (S101) under a load of 2160 gf and a temperature of 285 ° C. (g) was measured. The same measurement was repeated 3 times, and the average value was defined as MFR.
- S101 Toyo Seiki melt indexer
- [6] Content of 1,2-propanediol-derived component in the polyester First, a 1000 ⁇ g / ml aqueous solution of 1,2-butanediol was prepared and used as an internal standard solution A. 0.1 g of the sample was weighed into a vial, 0.015 ml of internal standard solution A and 1 ml of aqueous ammonia were added and sealed, heated at a temperature of 150 ° C. for 3 hours, and then allowed to cool to a temperature of 25 ° C. Subsequently, after adding 2 ml of methanol and 2.0 g of terephthalic acid, the mixture was shaken for 15 minutes and centrifuged at 4000 G for 3 minutes.
- a calibration curve for 1,2-propanediol was prepared according to the following procedure.
- a 1,000 ⁇ g / ml aqueous solution of 1,2-propanediol was prepared as standard mother liquor B.
- the amount of the standard mother liquor B to be added is selected so that the concentration of 1,2-propanediol is sufficient for the measurement of the sample.
- the prepared standard solution C was measured by gas chromatography under the above-mentioned conditions, and the peak area ratio of the obtained 1,2-propanediol and the internal standard substance and 1,2-propanediol in the standard solution C were determined.
- a calibration curve of 1,2-propanediol was prepared by plotting the concentration ratio of the internal standard substance on a graph.
- Viscosity of polyurethane resin solution After the sample (polyurethane resin solution) was temperature-controlled in a constant temperature water bath at a temperature of 20 ° C. for 5 hours, a B-type viscometer [BH viscometer manufactured by Toki Sangyo Co., Ltd.], No. The measurement was performed using a No. 7 rotor and a rotation speed of 20 rpm.
- Average single fiber diameter of the ultrafine fibers in the sheet-like material Three cross sections perpendicular to the thickness direction including the fibers of the sheet-like material were observed with a scanning electron microscope (VE-7800 manufactured by SEM KEYENCE) at a magnification of 3000, and a field of view of 30 ⁇ m ⁇ 30 ⁇ m per cross section. The single fiber diameters of 50 ultrafine fibers extracted at random were measured in ⁇ m to the first decimal place. The diameter of a total of 150 single fibers having three cross sections was measured, and the average value was calculated to the first decimal place.
- VE-7800 manufactured by SEM KEYENCE
- the fibers are excluded from the measurement target of the average fiber diameter as not corresponding to the ultrafine fibers.
- the ultrafine fiber has an irregular cross section, first, the cross-sectional area of the single fiber was measured, and the diameter of the single fiber was calculated by calculating the diameter when the cross section was assumed to be circular. An average value of this as a population was calculated and used as the average single fiber diameter.
- the measured value of the woven or knitted fabric from which the nonwoven fabric portion has been removed is divided by the measured value of the woven or knitted fabric before punching to determine the strength retention rate as a percentage.
- the strength retention rate is 70% or more and the determination is passed. The judgment was rejected.
- weight loss of wear was calculated by the following formula using the mass of the sheet-like material before and after wear.
- ⁇ Weight loss (mg) Mass before wear (mg) ⁇ Mass after wear (mg) [17]
- VE-7800 scanning electron microscope
- the pore diameter (diameter) of 50 randomly selected elastic resins was measured to the first decimal place in ⁇ m.
- the diameter of three observation cross-sections, a total of 150 holes, was measured, and the average of 150 was obtained. Further, the ratio of the number of pores having a pore diameter of 0.1 to 20 ⁇ m occupying 150 holes was calculated, and the ratio was the ratio of 0.1 to 20 ⁇ m fine holes occupying the porous structure.
- the cross-sectional area of the hole was first measured, and the diameter when the cross-section was assumed to be circular was calculated to obtain the hole diameter (diameter).
- activated carbon (Nimura Chemical Co., Ltd .: Dazai SGA) was washed with soft water and dried, and the activated carbon after drying was filled in the activated carbon treatment facility.
- the activated carbon layer had a thickness of 300 cm and a space velocity of 0.57 hr ⁇ 1 .
- the plant-derived ethylene glycol which had been heated and cooled as described above was poured into the activated carbon layer and collected.
- the activated carbon was washed with soft water and dried, and the activated carbon after drying was filled in an activated carbon treatment facility.
- the activated carbon layer had a thickness of 150 cm and a space velocity of 1.14 hr ⁇ 1 .
- the plant-derived ethylene glycol which had been heated and cooled as described above was poured into the activated carbon layer and collected. Finally, a plant-derived ethylene glycol (crude product) having a content of 1,2-propanediol of 2790 ppm was obtained.
- Reference Example 7 Synthesis of polymer (PET-1)
- the ethylene glycol used in Reference Example 7 was the plant-derived ethylene glycol (EG-1) obtained in Reference Example 1.
- antimony trioxide equivalent to 250 ppm in terms of antimony atoms and trimethyl phosphate equivalent to 20 ppm in terms of phosphorus atoms were added to the esterification reaction product as an ethylene glycol solution. Further, after 5 minutes, an ethylene glycol slurry of titanium oxide particles was added in an amount corresponding to 0.1% by weight in terms of titanium oxide particles to the obtained polymer. Thereafter, the reaction system was decompressed while stirring at 30 rpm to start the reaction. The reactor was gradually heated from 250 ° C. to 280 ° C., and the pressure was reduced to 110 Pa. The time to reach the final temperature and final pressure was both 60 minutes.
- Magnesium acetate equivalent to 60 ppm in terms of magnesium atom, 100 kg of dimethyl terephthalate, and 58 kg of ethylene glycol were melted in a nitrogen atmosphere at 150 ° C., and the temperature was increased to 230 ° C. with stirring over 3 hours. Then, methanol was distilled off and transesterification was performed to obtain bis (hydroxyethyl) terephthalate. This was transferred to a polycondensation tank.
- D-3 solution having a resin concentration of 30% by mass, a viscosity of 90,000 mPa ⁇ s / 20 ° C., and a coagulation value of 2.6.
- D-7 solution having a resin concentration of 30% by mass, a viscosity of 88,000 mPa ⁇ s / 20 ° C., and a coagulation value of 2.5. Obtained.
- acetone solution of a terminal isocyanate group urethane prepolymer.
- the obtained acetone solution was cooled to a temperature of 25 ° C., and 742.9 parts of acetone as a diluting solvent and 7.1 parts of triethylamine as a neutralizing agent were added. 583.3 parts of water was added to the acetone solution and emulsified by stirring with a homomixer for 1 minute, and then acetone was distilled off under reduced pressure. After cooling to a temperature of 25 ° C., water was added to a solid content of 40% by mass. Thus, an aqueous polyurethane resin dispersion (P-2) was obtained.
- Table 2 summarizes the polyurethane resins of Reference Examples 17 to 25.
- 1,10-decanediol (a2-1) used in these reference examples is a plant-derived raw material, and the plant-derived ratio of the polyurethane resin was calculated based on the plant-derived ratio of this raw material, and is shown in Table 2. .
- Example 1 (Nonwoven fabric) Using polystyrene as the sea component and polymer PET-1 as the island component, the sea component is 20% by mass, the island component is 80% by mass, the number of islands is 16 islands / 1 filament, and the average single fiber diameter is A 20 ⁇ m sea-island composite fiber was obtained.
- the obtained sea-island type composite fiber is cut into a fiber length of 51 mm to form a staple, a fiber web is formed through a card and a cross wrapper, and a basis weight is 750 g / m 2 and a nonwoven fabric having a thickness of 3.2 mm. Manufactured.
- the sheet made of ultrafine fibers obtained as described above was immersed in a polyurethane resin D-1 solution adjusted to a solid content concentration of 12% by mass, and then the polyurethane resin was solidified in an aqueous solution having a DMF concentration of 30% by mass. . Then, the polyurethane resin provision sheet
- the polyurethane resin-applied sheet obtained as described above is half-cut perpendicularly to the thickness direction, and the non-half-cut surface is ground with an endless sandpaper of sandpaper count 240, thereby having a napped having a thickness of 0.75 mm. A sheet was obtained.
- the sheet-like material having nap obtained as described above is dyed with a black dye under a temperature condition of 120 ° C. using a liquid dyeing machine, then dried with a dryer, A sheet-like material having an average single fiber diameter of 4.4 ⁇ m was obtained.
- the obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 2 to 4 A sheet-like material was obtained in the same manner as in Example 1 except that the island component polymer was changed to the conditions shown in Table 3 in Example 1. The obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 5 (Nonwoven fabric) Using polymer PET-5 as the sea component and polymer PET-1 as the island component, the sea component is 20% by mass, the island component is 80% by mass, the number of islands is 16 islands / 1 filament, average single unit A sea-island type composite fiber having a fiber diameter of 20 ⁇ m was obtained. The obtained sea-island type composite fiber is cut into a fiber length of 51 mm to form a staple, a fiber web is formed through a card and a cross wrapper, and a basis weight is 730 g / m 2 and a nonwoven fabric having a thickness of 3.0 mm Manufactured.
- the sheet made of ultrafine fibers obtained as described above was immersed in a polyurethane resin D-1 solution adjusted to a solid content concentration of 12% by mass, and then the polyurethane resin was solidified in an aqueous solution having a DMF concentration of 30% by mass. . Then, the polyurethane resin provision sheet
- the sheet-like material having nap obtained as described above is dyed with a black dye under a temperature condition of 120 ° C. using a liquid dyeing machine, then dried with a dryer, A sheet-like material having an average single fiber diameter of 4.4 ⁇ m was obtained.
- the obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 6 A sheet-like material was obtained in the same manner as in Example 5 except that the sea component polymer was changed to PET-6 in Example 5. The obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 7 A sheet-like material was obtained in the same manner as in Example 1 except that the polyurethane resin was changed to D-2 in Example 1. The obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 8 to 9 A sheet-like material was obtained in the same manner as in Example 1 except that the polyurethane resin in Example 1 was changed to D-3 and D-4, respectively.
- the obtained sheet-like material had uniform napping and soft texture, and had good wear resistance.
- Example 10 (Applying polyurethane resin) A sheet made of ultrafine fibers obtained in the same manner as in Example 5 was immersed in an aqueous dispersion of polyurethane resin P-1 adjusted to a solid content concentration of 10% by mass, and then dried with hot air at a temperature of 110 ° C. for 15 minutes. As a result, a polyurethane resin-added sheet having a thickness of 1.8 mm was obtained.
- the sheet-like material having nap obtained as described above is dyed with a black dye under a temperature condition of 120 ° C. using a liquid dyeing machine, then dried with a dryer, A sheet-like material having an average single fiber diameter of 4.4 ⁇ m was obtained.
- the obtained sheet-like material had uniform napping and soft texture, and had good wear resistance.
- Example 11 to 12 A sheet-like material was obtained in the same manner as in Example 1 except that the average single fiber diameter of the ultrafine fibers was 2.0 ⁇ m and 5.5 ⁇ m in Example 1. The obtained sheet-like material had uniform and elegant napping and a soft texture, and had good wear resistance.
- Example 13 In Example 1, the single fiber diameter of the yarn produced from the yarn made from the polymer PET-1 was 10 ⁇ m for both the warp yarn and the weft yarn, the twist number was 2000 T / m, the weave density was 2.54 cm (1 inch).
- Example 14 to 15 A sheet-like material was obtained in the same manner as in Example 13, except that the single fiber diameter of the woven yarn in Example 13 was 6.0 ⁇ m and 25 ⁇ m, respectively.
- the obtained sheet-like material had uniform and elegant napping and soft texture, good abrasion resistance, high strength retention of the fabric, and softness but good strength. .
- Example 16 to 18 A sheet-like material was obtained in the same manner as in Example 13 except that the polymer of the yarn yarn in Example 13 was PET-2, PET-3, and PET-4, respectively.
- the obtained sheet-like material had uniform and elegant napping and soft texture, good abrasion resistance, high strength retention of the fabric, and softness but good strength. .
- Example 19 A sheet-like material was obtained in the same manner as in Example 13 except that in Example 13, the number of twists of the woven yarn was set to 3000 T / m.
- the obtained sheet-like material had uniform and elegant napping and soft texture, good abrasion resistance, high strength retention of the fabric, and softness but good strength. .
- Table 3 summarizes the sheet-like materials of Examples 1 to 19.
- the island component polymer By adding a specific amount of 1,2-propanediol to the island component polymer, heat resistance is improved, and a decrease in intrinsic viscosity is suppressed, so that a sheet-like material having excellent wear resistance can be obtained. Moreover, it can be set as the porous structure which has a micropore by making a polyurethane resin into a specific composition, and the softness
- the heat resistance of the polymer is improved, the decrease in intrinsic viscosity is suppressed, and the wear resistance is increased.
- the strength retention of the fabric in the punching process can be increased, and in addition to the above-described properties, a sheet-like material that is flexible but has high strength can be obtained.
- Example 1 A sheet-like material was obtained in the same manner as in Example 1 except that the island component polymer was PET-7 and the polyurethane resin was D-3 in Example 1. Since the polymer PET-7 as an island component contains an excessive amount of 1,2-propanediol, the heat resistance of the polymer becomes insufficient, and the obtained sheet-like material has a relatively soft texture. However, it was inferior in wear resistance in a non-uniform raised state.
- a sheet-like material was obtained in the same manner as in Comparative Example 1 except that the island component polymers in Comparative Example 1 were PET-9 and PET-10, respectively.
- the polymer PET-9 which is an island component, contains an excessive amount of 1,2-propanediol, and the polymer PET-10 contains 1,2-propanediol below the detection limit.
- the obtained sheet-like material had a relatively soft texture, but was inferior in wear resistance in a non-uniform raised state.
- Example 4 A sheet-like material was obtained in the same manner as in Example 5 except that in Example 5, the island component polymer was PET-7, the sea component polymer was PET-8, and the polyurethane resin was D-3. Since the polymer PET-7 as an island component contains an excessive amount of 1,2-propanediol, the heat resistance of the polymer becomes insufficient, and the obtained sheet-like material has a relatively soft texture. However, in a non-uniform raised state, the wear resistance was poor.
- Example 5 A sheet-like material was obtained in the same manner as in Example 1 except that the polyurethane resin in Example 1 was changed to D-5, D-6, and D-7, respectively.
- Polyurethane resins D-5 and D-7 have a low molar ratio of polycarbonate diol (a2), and polyurethane resin D-6 has a high molar ratio of polycarbonate diol (a2), so the polyurethane resin is hard and has fine pores. Since the formation of the porous structure was insufficient and the grindability of the polyurethane resin was lowered, the obtained sheet-like product was partially inhomogeneous and inferior in flexibility and wear resistance.
- Example 8 A sheet-like material was obtained in the same manner as in Example 10 except that the polyurethane resin was changed to P-2 in Example 10.
- the polyurethane resin P-2 the molar ratio of the polycarbonate diol (a2) is low, the polyurethane resin is hard, a porous structure having fine pores cannot be formed, and the grindability of the polyurethane resin is lowered. In a non-uniform raised state, the flexibility and wear resistance were poor. Moreover, the porous structure could not be confirmed in the elastic resin (polyurethane resin) in the sheet-like material.
- a sheet-like material was obtained in the same manner as in Comparative Example 1 except that the polyurethane resin in Comparative Example 1 was changed to D-5 and D-6, respectively.
- the island component polymer PET-7 contains an excessive amount of 1,2-propanediol, so the heat resistance of the polymer is insufficient, and the polyurethane resin D-5 has a low molar ratio of polycarbonate diol (a2).
- the polyurethane resin D-6 since the molar ratio of the polycarbonate diol (a2) is high, the polyurethane resin is hard and the formation of a microporous structure having micropores is insufficient, and the grindability of the polyurethane resin is reduced.
- the sheet-like material was inferior in flexibility and abrasion resistance in a non-uniform raised state.
- Comparative Example 11 In Comparative Example 5, the single fiber diameter of the yarn produced from the yarn made from polymer PET-7 was 10 ⁇ m for both the warp and weft yarns, the twist number was 2000 T / m, and the weave density was 2.54 cm (1 inch).
- the abrasion resistance of the polymer is insufficient because the polymer PET-7 of the fabric contains an excessive amount of 1,2-propanediol, and the heat resistance of the polymer is insufficient. Low, the tenacity retention rate of the fabric was low, and the strength of the sheet-like material was insufficient.
- Comparative Example 12 A sheet-like material was obtained in the same manner as in Comparative Example 11 except that the textile yarn polymer in Comparative Example 11 was changed to PET-10. Since the polyurethane resin is hard and the formation of a microporous structure having fine pores is insufficient, and the grindability of the polyurethane resin is reduced, the obtained sheet-like material is partially uneven in the raised state, and is flexible. In addition, the polymer PET-10 of the fabric is inferior in wear resistance, and since 1,2-propanediol is below the detection limit, the heat resistance of the polymer is insufficient, and the wear resistance of the polymer is low. The strength retention of the woven fabric was lowered, and the strength of the sheet-like material was insufficient.
- the tenacity retention rate of the fabric was low, and the strength of the sheet-like material was insufficient.
- the number of twists of the yarn of the woven fabric was small, the strength retention was further lowered, and the strength of the sheet-like material was insufficient.
- the number of twists was large, the strength retention was slightly improved, but the flexibility of the sheet-like material was further lowered.
- Table 4 summarizes the sheet-like materials of Comparative Examples 1 to 14.
- the amount of 1,2-propanediol in the polymer of the island component is excessive or less than the detection limit, the effect of improving the heat resistance of the polymer becomes insufficient, and the decrease in intrinsic viscosity becomes large. Abrasion is inferior.
- the molar ratio of the polycarbonate diol (a2) in the polyurethane resin is out of a specific range, the polyurethane resin becomes hard, and the formation of a porous structure having fine pores becomes insufficient, and the flexibility of the sheet-like material is reduced. It will be inferior.
- the sheet-like material becomes non-uniform napping and the appearance is impaired.
- the effect of improving the heat resistance of the polymer becomes insufficient and the inherent viscosity decreases greatly.
- the wear resistance is lowered, the strength retention of the woven or knitted fabric in the needle punching process is lowered, and the strength of the sheet-like material is impaired.
- the number of twists of the yarn of the woven or knitted fabric is too small, the strength retention of the woven or knitted fabric is further reduced.
- the number of twists is too large, the woven or knitted fabric is not flexible and the flexibility of the sheet-like material is impaired.
- Example 20 ⁇ Raw cotton> (Island component polymer) As the island component polymer, the polymer PET-1 prepared in Reference Example 7 was used.
- sea component polymer As the sea component polymer, polystyrene (PSt) having a Vicat softening point of 102 ° C. and an MFR of 67.8 was used.
- PSt polystyrene
- the film was stretched in two stages so that the total magnification was 2.8 times, and crimped using a stuffing box type crimper to obtain a sea-island type composite fiber.
- the sea-island type composite fiber thus obtained had a single fiber fineness of 4.2 dtex.
- This sea-island type composite fiber was cut into a fiber length of 51 mm to obtain a raw cotton of sea-island type composite fiber.
- needle punching is performed at a needle depth of 7 mm and a punch number of 3000 / cm 2 , with a basis weight of 700 g / m 2 and an apparent density of
- the obtained sheet substrate was excellent in strength retention.
- the sheet substrate is shrunk with hot water at a temperature of 98 ° C., impregnated with a 5% PVA (polyvinyl alcohol) aqueous solution, and dried with hot air at a temperature of 120 ° C. for 10 minutes.
- a sheet substrate having a PVA mass of 6 mass% based on the mass was obtained.
- This sheet substrate was immersed in trichlorethylene to dissolve and remove sea components, and a sea-removed sheet in which a nonwoven fabric made of ultrafine fibers and a woven fabric were intertwined was obtained.
- the seawater-free sheet made of nonwoven fabric and woven fabric made of ultrafine fibers thus obtained was immersed in a DMF (dimethylformamide) solution of polycarbonate polyurethane adjusted to a solid content concentration of 12%, and then a DMF concentration of 30%.
- the polyurethane was coagulated in an aqueous solution.
- PVA and DMF are removed with hot water and dried with hot air at a temperature of 110 ° C. for 10 minutes, whereby the polyurethane mass is 28% by mass with respect to the total mass of the ultrafine fibers made of island components and the fabric.
- a body resin-applied sheet substrate was obtained.
- the sheet was cut in half in the thickness direction by a half-cut having an endless band knife, and the half-cut surface was ground in three stages using a JIS # 180 sandpaper to form napped hairs to produce a sheet-like material.
- the single fiber diameter of the ultrafine fiber was 4.4 ⁇ m.
- Example 21 As a woven fabric, the yarn has a single yarn diameter of 6.0 ⁇ m for both warp and weft (total fineness 110 dtex-288 filament), a twist number of 2000 T / m, and a weave density of 95 ⁇ 76 per inch (2.54 cm (1 inch)).
- a sheet-like material was produced after producing a sheet substrate in the same manner as in Example 20 except that a woven fabric with a plain weave structure (vertical x horizontal) was used. The obtained sheet-like material was excellent in flexibility. The results are shown in Table 5.
- Example 22 As a woven fabric, the yarn has a single yarn diameter of 25 ⁇ m for both warp and weft (total fineness: 112 dtex-16 filaments), a twist of 2000 T / m, and a weave density of 95 ⁇ 76 (length ⁇ 2.54 cm (1 inch)).
- An artificial leather (product) was produced after producing a sheet substrate in the same manner as in Example 20 except that a plain weave woven fabric was used. The obtained artificial leather (product) was excellent in flexibility. The results are shown in Table 5.
- Example 23 A sheet-like material was produced after producing a sheet substrate in the same manner as in Example 20 except that the polymer PET-2 produced in Reference Example 8 was used as the polymer for forming the woven fabric. The obtained sheet-like material was excellent in flexibility. The results are shown in Table 5.
- Example 24 A sheet-like material was produced after producing a sheet substrate in the same manner as in Example 20, except that the polymer PET-3 produced in Reference Example 9 was used as the polymer for forming the woven fabric. The obtained sheet-like material was excellent in flexibility. The results are shown in Table 5.
- Example 25 A sheet-like material was produced after producing a sheet substrate in the same manner as in Example 20, except that the polymer PET-4 produced in Reference Example 10 was used as the polymer for forming the woven fabric. The obtained sheet-like material was excellent in flexibility. The results are shown in Table 5.
- Example 26 A sheet-like material was produced after producing a sheet substrate in the same manner as in Example 20 except that a plain weave fabric having a twist number of 3000 T / m was used as the woven fabric. The obtained sheet-like material was excellent in flexibility. The results are shown in Table 5.
- Example 15 A sheet substrate was produced in the same manner as in Example 20, except that the polymer PET-7 produced in Reference Example 13 was used as the polymer for forming the woven fabric. The sheet substrate had poor strength retention. A sheet-like material was prepared from the sheet substrate. The results are shown in Table 6.
- Example 16 As in Example 20, except that the polymer PET-10 prepared in Reference Example 16 was used as the island component polymer, and the polymer PET-10 prepared in Reference Example 16 was used as the polymer forming the woven fabric. A sheet substrate was produced. The sheet substrate had poor strength retention. A sheet-like material was prepared from the sheet substrate. The results are shown in Table 6.
- Comparative Example 17 A sheet substrate was prepared in the same manner as in Comparative Example 15 except that a plain weave fabric having a twist number of 500 T / m was used as the fabric. The sheet substrate had poor strength retention. A sheet-like material was prepared from the sheet substrate. The results are shown in Table 6.
- Comparative Example 18 A sheet substrate was produced in the same manner as in Comparative Example 15 except that a plain weave fabric having a twist number of 5000 T / m was used as the fabric. The sheet substrate had poor strength retention. A sheet-like material was prepared from the sheet substrate. The results are shown in Table 6.
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Polyesters Or Polycarbonates (AREA)
- Laminated Bodies (AREA)
- Polyurethanes Or Polyureas (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
・機器:東ソー(株)社製HLC-8220
・カラム:東ソーTSKgel α-M
・溶媒:DMF
・温度:40℃
・校正:ポリスチレン。
・捲縮保持係数=(W/L-L0)÷2
・W:捲縮消滅荷重(捲縮が伸びきった時点の荷重:mg/dtex)
・L:捲縮消滅荷重下の繊維長(cm)
・L0:6mg/dtex下での繊維長(cm)。30.0cmをマーキングする。
[1]ポリエステルの固有粘度IV:
オルソクロロフェノールを溶媒として、25℃の温度で測定した。
事前に150℃×20時間×真空下(133Pa以下)で乾燥した試料(固有粘度(IVa))6.0gを、宝工業(株)製メルトインデクサー(MX-101B)を使用し、次の設定条件で押出した。
・荷重:1000g
・オリフィス内径:2.092mmφ
・測定距離:25.4mm
・シリンダー部温度×保持時間:295℃×60分。
・ΔIV=(IVa)-(IVb) 。
パーキンエルマー社(Perkin Elmaer)製DSC-7を用いて、2nd runでポリマーの溶融を示すピークトップ温度をポリマーの融点とした。このときの昇温速度は16℃/分で、サンプル量は10mgとした。測定は2回行い、その平均値を融点とした。
試料ペレット4~5gを、MFR計電気炉のシリンダーに入れ、東洋精機製メルトインデクサー(S101)を用いて、荷重2160gf、温度285℃の条件で、10分間に押し出される樹脂の量(g)を測定した。同様の測定を3回繰り返し、平均値をMFRとした。
2-アミノエタノールを溶媒とし、内部標準物質である1,6-ヘキサンジオールを加えて260℃の温度で分解した。冷却後、メタノールを加えたのち酸で中和し、析出物をろ過した。ろ液を、ガスクロマトグラフィ(島津製作所社製、GC-14B)によって測定した。
始めに1,2-ブタンジオールの1000μg/ml水溶液を調製し、内部標準液Aとした。試料0.1gをバイアルに秤量し、内部標準液Aを0.015ml、アンモニア水1mlを加え密栓し、150℃の温度で3時間加熱した後25℃の温度まで放冷した。続いて、メタノール2ml、テレフタル酸2.0gを加えた後、15分間振とうし、4000Gで3分間遠心分離した。上澄み液を取り出し、ガスクロマトグラフ(Hewlett Packard社製5890 seriesII、注入口:スプリット/スプリットレス注入口、検出器:水素炎イオン化検出器)によって、次の設定条件で測定し、後述する検量線を用いて含有量を求めた。
・インジェクタ温度:220℃
・カラムヘッド圧:20psi
・キャリアガス:ヘリウム
・試料導入方法:分割(線流速 25ml/分)
・隔壁パージ:ヘリウム 3.0ml/分
・試料導入量:1.0μl
・ディテクタ温度:220℃
・ガス流量:水素40ml/分,空気400ml/分,窒素40ml/分
・オーブン昇温開始温度:60℃(保持時間2分)
・オーブン昇温停止温度:220℃(保持時間2分)
・オーブン昇温速度:20℃/分(直線傾斜)。
エチレングリコール約0.15gを秤量し、5mlメスフラスコ中アセトンを用いて溶解し定容した。調製溶液を、ガスクロマトグラフ(Hewlett Packard社製5890 seriesII、注入口:スプリット/スプリットレス注入口、検出器:水素炎イオン化検出器)によって、次の設定条件で測定し、試料の代わりに1,2-プロパンジオールを用いて、同様の操作で測定し作製した検量線を用いて含有量を求めた。
・インジェクタ温度:250℃
・カラムヘッド圧:15psi
・キャリアガス:ヘリウム
・試料導入方法:分割(線流速 50ml/分)
・隔壁パージ:ヘリウム 3.0ml/分
・試料導入量:1.0μl
・ディテクタ温度:250℃
・ガス流量:水素40ml/分,空気400ml/分,窒素40ml/分
・オーブン昇温開始温度:50℃(保持時間3分)
・オーブン昇温停止温度:250℃(保持時間1分)
・オーブン昇温速度:15℃/分(直線傾斜) 。
試料(ポリカーボネートジオール)を、JIS K 7121-1987規定の方法で示査走査熱量計[メーカー:ティー・エイ・インスツルメント・ジャパン(株) 型番:Q20]で測定した。融点(Tm)および融解熱量(ΔH)は、JIS K 7121-1987規定の方法に準じ、20℃の温度から10℃/分の速度で80℃の温度まで昇温し、80℃の温度を10分間保持した後、20℃の温度まで10℃/分の速度で冷却し、20℃の温度で10分間保持した後、再び80℃の温度まで10℃/分の速度で昇温する操作を行い、2回目の昇温時の融解ピークから融点と融解ピークの熱収支から融解熱量を求めた。
試料(ポリウレタン樹脂溶液)を20℃の温度の恒温水槽で5時間温調した後、B型粘度計[東機産業(株)社製BH型粘度計]、No.7号ローター、回転数20rpmで測定した。
シート状物の繊維を含む厚さ方向に垂直な断面3個を、走査型電子顕微鏡(SEM キーエンス社製VE-7800型)を用いて3000倍で観察し、断面1個につき30μm×30μmの視野内で無作為に抽出した50本の極細繊維の単繊維直径をμm単位で、小数第1位まで測定した。断面3個の合計150本の単繊維の直径を測定し、平均値を小数第1位までで算出した。繊維径が50μmを超える繊維が混在している場合には、当該繊維は極細繊維に該当しないものとして平均繊維径の測定対象から除外するものとする。また、極細繊維が異形断面の場合、まず単繊維の断面積を測定し、当該断面を円形と見立てた場合の直径を算出することによって単繊維の直径を求めた。これを母集団とした平均値を算出し、平均単繊維直径とした。
織編物を厚み方向にカットし、織編物を構成する糸条の単繊維直径を走査型電子顕微鏡(SEM キーエンス社製VE-7800型)で、1000倍で観察し、10点測定した平均値で単繊維直径を評価した。
パンチ前の織編物および織編物と不織布とを絡合一体化させて得られたシート基体中の織編物の引張強さを、次の方法で求めた。不織布部分を除去した織編物単体とパンチ前の織編物を、それぞれからタテ20cmとヨコ5cmの試験片を切り出し、JIS L1096(1999)のA法にしたがって、テンシロン引張試験機を用いて、つかみ間隔10cmで試験片をつかんで、毎分10cmで定速伸長させてタテ方向の強力を測定した。測定はそれぞれ3回行い、平均値を算出した。
得られたシート状物について、健康な成人男性と成人女性各10名ずつ、計20名を評価者として、シート状物の外観目視とシート状物の手触り(タッチ)の官能評価にて下記のように5段階評価し、最も多かった評価を立毛品位とした。立毛品位はS~Aを良好とした。
S:均一な繊維の立毛があり、繊維の分散状態も良好で、なめらかな手触りである。
A:均一な繊維の立毛があり、繊維の分散状態にやや不良があるが、ほぼなめらかな手触りである。
B:繊維の立毛がやや不均一であり、繊維の分散状態にもやや不良があり、ややざらついた手触りである。
C:繊維の立毛が不均一であり、繊維の分散状態が不良で、ざらついた手触りである。
JIS L 1096:2010「織物および編物の生地試験方法」の8.21「剛軟度」の、8.21.1に記載のA法(45°カンチレバー法)に基づき、タテ方向とヨコ方向へそれぞれ2×15cmの試験片を5枚作成し、45°の角度の斜面を有する水平台へ置き、試験片を滑らせて試験片の一端の中央点が斜面と接したときのスケールを読み、5枚の平均値を求めた。
得られたシート状物の柔軟性について、健康な男女20名による官能評価を実施した。シート状物をφ250mmの円形に切断し、手のひらで握ったときの触感により、次の5~1の範囲内の1刻みで判定してもらい、20名の平均値で求めた。評価結果が4.0以上で、柔軟性良好とした。
5:柔軟性を有し、かつ適度な反発感があるもの。
4:柔軟性を有し、反発感があるが、若干少ないもの。
3:柔軟性が若干あり、反発感が少ないもの。
2:柔軟性がなく、反発感が若干あるもの。または、柔軟性が若干あり、反発感のないもの。
1:柔軟性がなく硬く、反発感がなく、ペーパーライクなもの。
マーチンデール摩耗試験機として、James H.Heal&Co.製のModel 406を用い、標準摩擦布として同社のABRASTIVE CLOTH SM25を用いた。シート状物に12kPaの荷重をかけ、摩耗回数20,000回行った後、シート状物の外観を目視で観察し、毛玉(ピリング)の評価を行った。評価基準は、シート状物の外観が摩耗前と全く変化が無かったものを5級とし、毛玉が多数発生したものを1級とし、その間を0.5級ずつに区切った。
・摩耗減量(mg)=摩耗前の質量(mg)-摩耗後の質量(mg)
[17]弾性体樹脂の多孔構造の平均孔径および多孔構造の全孔に占める孔径0.1~20μmの微細孔の割合:
シート状物の弾性体樹脂を含む不織布の厚さ方向に垂直な断面を、走査型電子顕微鏡(SEM キーエンス社製VE-7800型)を用いて2000倍で観察し、40μm×40μmの視野内で無作為に抽出した50個の弾性体樹脂中の孔の孔径(直径)をμm単位で、小数第1位まで測定した。この観察断面を3個、合計150個の孔の孔径を測定し、150個の平均を求めた。また、150個の孔に占める孔径0.1~20μmの孔数の割合を算出し、多孔構造に占める0.1~20μmの微細孔の割合とした。なお、弾性樹脂内の孔が異形孔の場合、まず孔の断面積を測定し、当該断面を円形と見立てた場合の直径を算出することによって孔の孔径(直径)を求めた。
下記の参考例で用いた化学物質の略号の意味は、次のとおりである。
・EG:エチレングリコール
・TPA:テレフタル酸
・DMT:テレフタル酸ジメチル
・SSIA:5-スルホイソフタル酸ナトリウム
・BG:1,4-ブタンジオール
・MDI:4,4‘-ジフェニルメタンジイソシアネート
・HDI:ヘキサメチレンジイソシアネート
・DMF:N,N-ジメチルホルムアミド
・DMPA:2,2-ジメチロールプロピオン酸。
重合に用いた原料は、次のとおりである。
・植物由来エチレングリコール:長春大成集団製
(エチレングリコール=98.138質量%、1,2-プロパンジオール=5410ppm、1,2-ブタンジオール=2390ppm、2,3-ブタンジオール=6310ppm、1,4-ブタンジオール=4510ppm)
・化石燃料由来エチレングリコール:三菱化学社製
(エチレングリコール=99.989質量%、1,2-プロパンジオール<1ppm(検出せず)、ジエチレングリコール=110ppm)
・テレフタル酸:三井化学社製高純度テレフタル酸(1,2-プロパンジオール<1ppm(検出せず))
・テレフタル酸ジメチル:SKケミカル社製(1,2-プロパンジオール<1ppm(検出せず))。
入手した20kgバイオマス資源由来エチレングリコール(EG)を蒸留操作として、理論段数40段、圧力50mmHg、還流比10の条件で実施し、塔底残留物として粗エチレングリコールを得た(1,2-プロパンジオール:3520ppm含有)。得られた粗エチレングリコールを設定温度190℃の加熱釜中で15時間加熱した後、25℃の温度まで冷却した。
活性炭層の厚さを200cmとし、空間速度を0.86hr-1としたこと以外は、参考例1と同様にして、最終的に1,2-プロパンジオールの含有量が910ppmの植物由来エチレングリコール(EG-2)を得た。
蒸留操作後の粗エチレングリコールの加熱処理時間を30時間とし、活性炭層の厚さを500cmとし、空間速度を0.34hr-1としたこと以外は、参考例1と同様にして、最終的に1,2-プロパンジオールの含有量が50ppmの植物由来エチレングリコール(EG-3)を得た。
植物由来エチレングリコールを設定温度190℃の加熱釜中で10時間加熱した後、25℃の温度まで冷却した。
入手した20kg植物由来エチレングリコールを1回目の蒸留操作として、理論段数30段、圧力50mmHg、還流比5の条件にて実施したところ、塔底残留物として粗エチレングリコールを得た(1,2-プロパンジオール:4180ppm含有)。続いて2回目の蒸留として、理論段数30段、圧力50mmHg、還流比5の条件で実施した。最終的に塔底残留物として、1,2-プロパンジオールの含有量が3020ppmのバイオマス資源由来エチレングリコール(EG-5)を得た。
1,2-プロパンジオールが検出されない(1ppm未満)化石燃料由来エチレングリコール(三菱化学社製、EG-6)。
参考例7で用いたエチレングリコールは、全て参考例1で得られた植物由来エチレングリコール(EG-1)を用いた。
参考例8で用いたエチレングリコールは全て参考例1で得られたバイオマス資源由来エチレングリコール(EG-1)を用いた。
用いるエチレングリコールを表1に示したとおり変更したこと以外は、参考例7と同様にしてポリマー(PET-3、PET-4)ペレットを得た。結果を表1にまとめた。
用いる重合触媒とその添加量、および酸化チタンの添加量、得られるポリマーを構成する全ジカルボン酸成分を基準として8mol%相当の5-スルホイソフタル酸ナトリウムジメチルエステルをエステル化反応物に添加したこと以外は、参考例8と同様にしてポリマー(PET-5)ペレットを得た。結果を表1にまとめた。
得られるポリマーを構成する全ジカルボン酸成分を基準として5mol%相当の5-スルホイソフタル酸ナトリウムジメチルエステルをエステル化反応物に添加したこと以外は、参考例7と同様にしてポリマーペレットを得た。結果を表1にまとめた。
用いるエチレングリコールを表1に示したとおり変更したこと以外は、参考例7と同様にしてポリマー(PET-7)ペレットを得た。結果を表1にまとめた。
用いるエチレングリコールを表1に示した通り変更したこと以外は、参考例11と同様にしてポリマーペレットを得た。結果を表1にまとめた。
用いるエチレングリコールを表1に示した通り変更したこと以外は、参考例7と同様にしてポリマー(PET-9、PET-10)ペレットを得た。結果を表1にまとめた。
攪拌機および温度計を備えた四つ口フラスコに、数平均分子量1,979(水酸基価56.7)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:91/9)共重合ポリカーボネートジオール(A1-1)100部、数平均分子量2,000(水酸基価=56.1)の3-メチル-ペンタンジオール(a3-1)/1,6-ヘキサンジオール(a3-2)(モル%比:50/50)共重合ポリカーボネートジオール(A2-1)100部、EG(C-1)7.6部、MDI(B-1)61.6部およびDMF628部を仕込み、乾燥窒素雰囲気下で70℃の温度で15時間反応させ、樹脂濃度30質量%、粘度80,000mPa・s/20℃、凝固価3.8のポリウレタン樹脂(D-1)の溶液を得た。
参考例17と同様の反応容器に、数平均分子量2,018(水酸基価55.6)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:81/19)共重合ポリカーボネートジオール(A1-2)140部、数平均分子量1,979(水酸基価57.5)の3-メチル-ペンタンジオール(a3-1)/1,6-ヘキサンジオール(a3-2)(モル%比:85/15)共重合ポリカーボネートジオール(A2-2)60部、EG(C-1)9.6部、MDI(B-1)73.1部およびDMF660部を仕込み、乾燥窒素雰囲気下で65℃の温度で20時間反応させ、樹脂濃度30質量%、粘度95,000mPa・s/20℃、凝固価3.4のポリウレタン樹脂(D-2)の溶液を得た。
参考例17と同様の反応容器に、数平均分子量2,018(水酸基価55.6)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:81/19)共重合ポリカーボネートジオール(A1-2)200部、EG(C-1)8.6部、MDI(B-1)65.4部およびDMF648部を仕込み、乾燥窒素雰囲気下で70℃の温度で15時間反応させ、樹脂濃度30質量%、粘度90,000mPa・s/20℃、凝固価2.6のポリウレタン樹脂(D-3)の溶液を得た。
参考例17と同様の反応容器に、数平均分子量1,963(水酸基価57.2)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:61/39)共重合ポリカーボネートジオール(A1-3)200部、EG(C-1)8.6部、MDI(B-1)65.4部およびDMF648部を仕込み、乾燥窒素雰囲気下で70℃の温度で15時間反応させ、樹脂濃度30質量%、粘度89,000mPa・s/20℃、凝固価2.7のポリウレタン樹脂(D-4)の溶液を得た。
攪拌機および温度計を備えた加圧可能な容器に、数平均分子量1,989(水酸基価56.4)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:71/29)共重合ポリカーボネートジオール(A1-4)120部、数平均分子量1,979(水酸基価57.5)の3-メチル-ペンタンジオール(a3-1)/1,6-ヘキサンジオール(a3-2)(モル%比:85/15)共重合ポリカーボネートジオール(A2-2)80部、EG(C-1)8.9部、DMPA(A3-1)5.02部、HDI(B-2)56.0部およびアセトン112部を仕込み、反応系を窒素ガスで置換したのち、攪拌下80℃の温度で12時間反応させ、末端イソシアネート基ウレタンプレポリマーのアセトン溶液を得た。得られた該アセトン溶液を25℃の温度まで冷却して、希釈溶剤としてのアセトン742.9部、中和剤としてのトリエチルアミン7.1部を加えた。水583.3部を該アセトン溶液に加えホモミキサーで1分間攪拌して乳化した後、減圧下でアセトンを留去し、25℃の温度まで冷却した後に水を加えて固形分40質量%に調整し、ポリウレタン樹脂水性分散体(P-1)を得た。
参考例17と同様の反応容器に、数平均分子量1,983(水酸基価56.5)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:31/69)共重合ポリカーボネートジオール(A1-5)200部、BG(C-2)12.5部、MDI(B-1)65.4部およびDMF648部を仕込み、乾燥窒素雰囲気下で70℃の温度で15時間反応させ、樹脂濃度30質量%、粘度87,000mPa・s/20℃、凝固価2.5のポリウレタン樹脂(D-5)の溶液を得た。
参考例17と同様の反応容器に、数平均分子量2,036(水酸基価55.1)の1,10-デカンジオール(a2-1)ポリカーボネートジオール(A1-6)200部、BG(C-2)12.6部、MDI(B-1)66.0部およびDMF650部を仕込み、乾燥窒素雰囲気下で70℃の温度で15時間反応させ、樹脂濃度30質量%、粘度89,000mPa・s/20℃、凝固価2.3のポリウレタン樹脂(D-6)の溶液を得た。
参考例17と同様の反応容器に、数平均分子量1,983(水酸基価56.5)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:31/69)共重合ポリカーボネートジオール(A1-5)140部、数平均分子量1,979(水酸基価57.5)の3-メチル-ペンタンジオール(a3-1)/1,6-ヘキサンジオール(a3-2)(モル%比:85/15)共重合ポリカーボネートジオール(A2-2)60部、BG(C-2)13.9部、MDI(B-1)73.1部およびDMF660部を仕込み、乾燥窒素雰囲気下で65℃の温度で20時間反応させ、樹脂濃度30質量%、粘度88,000mPa・s/20℃、凝固価2.5のポリウレタン樹脂(D-7)の溶液を得た。
参考例21と同様の反応容器に、数平均分子量1,983(水酸基価56.5)の1,10-デカンジオール(a2-1)/1,4-ブタンジオール(a1-1)(モル%比:31/69)共重合ポリカーボネートジオール(A1-5)120部、数平均分子量1,979(水酸基価57.5)の3-メチル-ペンタンジオール(a3-1)/1,6-ヘキサンジオール(a3-2)(モル%比:85/15)共重合ポリカーボネートジオール(A2-2)80部、EG(C-1)8.9部、DMPA(A3-1)5.02部、HDI(B-2)56.0部およびアセトン112部を仕込み、反応系を窒素ガスで置換したのち、攪拌下80℃の温度で12時間反応させ、末端イソシアネート基ウレタンプレポリマーのアセトン溶液を得た。得られた該アセトン溶液を25℃の温度まで冷却して、希釈溶剤としてのアセトン742.9部、中和剤としてのトリエチルアミン7.1部を加えた。水583.3部を該アセトン溶液に加えホモミキサーで1分間攪拌して乳化した後、減圧下でアセトンを留去し、25℃の温度まで冷却した後に水を加えて固形分40質量%に調整し、ポリウレタン樹脂水性分散体(P-2)を得た。
(不織布)
海成分としてポリスチレンを用い、島成分としてポリマーPET-1を用いて、海成分が20質量%、島成分が80質量%の複合比率で、島数が16島/1フィラメント、平均単繊維直径が20μmの海島型複合繊維を得た。得られた海島型複合繊維を、繊維長51mmにカットしてステープルとし、カードおよびクロスラッパーを通して繊維ウェブを形成し、ニードルパンチ処理により、目付が750g/m2で、厚みが3.2mmの不織布を製造した。
得られた不織布を、トリクロロエチレンに浸漬してマングルで絞ることを5回繰り返すことにより、海島型複合繊維の海成分を除去した極細繊維からなるシートを得た。
上記のようにして得られた極細繊維からなるシートを、固形分濃度12質量%に調整したポリウレタン樹脂D-1溶液に浸漬し、次いでDMF濃度30質量%の水溶液中でポリウレタン樹脂を凝固させた。その後、110℃の温度の熱風で10分間乾燥することにより、厚みが1.9mmのポリウレタン樹脂付与シートを得た。
上記のようにして得られたポリウレタン樹脂付与シートを厚さ方向に垂直に半裁し、非半裁面をサンドペーパー番手240番のエンドレスサンドペーパーで研削することにより、厚みが0.75mmの立毛を有するシート状物を得た。
上記のようにして得られた立毛を有するシート状物を、液流染色機を用いて120℃の温度条件下で黒色染料を用いて染色を行い、次いで乾燥機で乾燥を行い、極細繊維の平均単繊維直径が4.4μmのシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例1で島成分のポリマーを表3の条件としたこと以外は、実施例1と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
(不織布)
海成分としてポリマーPET-5を用い、島成分としてポリマーPET-1を用いて、海成分が20質量%、島成分が80質量%の複合比率で、島数が16島/1フィラメント、平均単繊維直径が20μmの海島型複合繊維を得た。得られた海島型複合繊維を、繊維長51mmにカットしてステープルとし、カードおよびクロスラッパーを通して繊維ウェブを形成し、ニードルパンチ処理により、目付が730g/m2で、厚みが3.0mmの不織布を製造した。
得られた不織布を、95℃の温度に加熱した濃度10g/Lの水酸化ナトリウム水溶液に浸漬して30分間処理を行い、海島型複合繊維の海成分を除去した極細繊維からなるシートを得た。
上記のようにして得られた極細繊維からなるシートを、固形分濃度12質量%に調整したポリウレタン樹脂D-1溶液に浸漬し、次いでDMF濃度30質量%の水溶液中でポリウレタン樹脂を凝固させた。その後、110℃の温度の熱風で10分間乾燥することにより、厚みが1.8mmのポリウレタン樹脂付与シートを得た。
上記のようにして得られたポリウレタン樹脂付与シートを厚さ方向に垂直に半裁し、非半裁面をサンドペーパー番手240番のエンドレスサンドペーパーで研削することにより、厚みが0.7mmの立毛を有するシート状物を得た。
上記のようにして得られた立毛を有するシート状物を、液流染色機を用いて120℃の温度条件下で黒色染料を用いて染色を行い、次いで乾燥機で乾燥を行い、極細繊維の平均単繊維直径が4.4μmのシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例5で海成分のポリマーをPET-6としたこと以外は、実施例5と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例1でポリウレタン樹脂をD-2としたこと以外は、実施例1と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例1でポリウレタン樹脂をそれぞれD-3とD-4としたこと以外は、実施例1と同様にしてシート状物を得た。得られたシート状物は、均一な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
(ポリウレタン樹脂の付与)
実施例5と同様にして得られた極細繊維からなるシートを、固形分濃度10質量%に調整したポリウレタン樹脂P-1水分散液に浸漬し、次いで110℃の温度の熱風で15分間乾燥することにより、厚みが1.8mmのポリウレタン樹脂付与シートを得た。
上記のようにして得られたポリウレタン樹脂付与シートを厚さ方向に垂直に半裁し、非半裁面をサンドペーパー番手240番のエンドレスサンドペーパーで研削することにより、厚みが0.7mmの立毛を有するシート状物を得た。
上記のようにして得られた立毛を有するシート状物を、液流染色機を用いて120℃の温度条件下で黒色染料を用いて染色を行い、次いで乾燥機で乾燥を行い、極細繊維の平均単繊維直径が4.4μmのシート状物を得た。得られたシート状物は、均一な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例1で極細繊維の平均単繊維直径を2.0μmと5.5μmとしたこと以外は、実施例1と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性は良好であった。
実施例1において、ポリマーPET-1で製糸した糸条から作製した、糸条の単繊維直径がタテ糸、ヨコ糸ともに10μmで、撚数が2000T/m、織密度が2.54cm(1インチ)当たり95×76(タテ×ヨコ)の平織組織の織物で、ウェブを上下に挟み、織物/繊維ウェブ/織物の積層状態にして、ニードルパンチ処理を行い、目付が750g/m2で、厚みが3.1mmの不織布を製造したこと、および、ポリウレタン樹脂付与シートを厚さ方向に垂直に半裁し、半裁面を研削したこと以外は、実施例1と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性が良好であるとともに、織物の強力保持率が高く、柔軟でありながらも、強力は良好であった。
実施例13で織物の糸条の単繊維直径をそれぞれ6.0μm、25μmとしたこと以外は、実施例13と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性が良好であるとともに、織物の強力保持率が高く、柔軟でありながらも、強力は良好であった。
実施例13で織物の糸条のポリマーをそれぞれPET-2、PET-3、PET-4としたこと以外は、実施例13と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性が良好であるとともに、織物の強力保持率が高く、柔軟でありながらも、強力は良好であった。
実施例13で織物の糸条の撚数を3000T/mとしたこと以外は、実施例13と同様にしてシート状物を得た。得られたシート状物は、均一で優美な立毛と柔軟な風合いを有し、耐摩耗性が良好であるとともに、織物の強力保持率が高く、柔軟でありながらも、強力は良好であった。
実施例1で島成分のポリマーをPET-7とし、ポリウレタン樹脂をD-3としたこと以外は、実施例1と同様にしてシート状物を得た。島成分のポリマーPET-7には1,2-プロパンジオールが過剰量含まれているため、ポリマーの耐熱性が不十分となり、得られたシート状物は、比較的柔軟な風合いを有していたが、不均一な立毛状態で耐摩耗性にも劣るものであった。
比較例1で島成分のポリマーをそれぞれPET-9とPET-10としたこと以外は、比較例1と同様にしてシート状物を得た。島成分のポリマーPET-9には1,2-プロパンジオールが過剰量含まれているため、またポリマーPET-10は1,2-プロパンジオールが検出限界以下であるため、ポリマーの耐熱性が不十分となり、得られたシート状物は、比較的柔軟な風合いを有していたが、不均一な立毛状態で耐摩耗性にも劣るものであった。
実施例5で島成分のポリマーをPET-7とし、海成分のポリマーをPET-8とし、ポリウレタン樹脂をD-3としたこと以外は、実施例5と同様にしてシート状物を得た。島成分のポリマーPET-7には1,2-プロパンジオールが過剰量含まれているため、ポリマーの耐熱性が不十分となり、得られたシート状物は、比較的柔軟な風合いを有していたが、不均一な立毛状態で、耐摩耗性にも劣るものであった。
実施例1でポリウレタン樹脂をそれぞれD-5、D-6およびD-7としたこと以外は、実施例1と同様にしてシート状物を得た。ポリウレタン樹脂D-5とD-7ではポリカーボネートジオール(a2)のモル比率が低く、ポリウレタン樹脂D-6ではポリカーボネートジオール(a2)のモル比率が高いため、ポリウレタン樹脂が硬く、また微細孔を有する微多孔構造を形成が不十分となり、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、部分的に不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであった。
実施例10でポリウレタン樹脂をP-2としたこと以外は、実施例10と同様にしてシート状物を得た。ポリウレタン樹脂P-2では、ポリカーボネートジオール(a2)のモル比率が低く、ポリウレタン樹脂が硬く、微細孔を有する多孔構造を形成できず、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであった。また、シート状物中の弾性体樹脂(ポリウレタン樹脂)に多孔構造は確認できなかった。
比較例1でポリウレタン樹脂をそれぞれD-5およびD-6としたこと以外は、比較例1と同様にしてシート状物を得た。島成分のポリマーPET-7には、1,2-プロパンジオールが過剰量含まれているため、ポリマーの耐熱性が不十分となり、ポリウレタン樹脂D-5ではポリカーボネートジオール(a2)のモル比率が低く、ポリウレタン樹脂D-6ではポリカーボネートジオール(a2)のモル比率が高いため、ポリウレタン樹脂が硬く、また微細孔を有する微多孔構造を形成が不十分となり、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであった。
比較例5において、ポリマーPET-7で製糸した糸条から作製した、糸条の単繊維直径がタテ糸、ヨコ糸ともに10μmで、撚数が2000T/m、織密度が2.54cm(1インチ)当たり95×76(タテ×ヨコ)の平織組織の織物で、ウェブを上下に挟み、織物/繊維ウェブ/織物の積層状態にして、ニードルパンチ処理を行い、目付が750g/m2で、厚みが3.1mmの不織布を製造したこと、および、ポリウレタン樹脂付与シートを厚さ方向に垂直に半裁し、半裁面を研削したこと以外は、比較例5と同様にしてシート状物を得た。ポリウレタン樹脂が硬く、また微細孔を有する微多孔構造を形成が不十分となり、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、部分的に不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであり、さらに、織物のポリマーPET-7には1,2-プロパンジオールが過剰量含まれているため、ポリマーの耐熱性が不十分で、ポリマーの耐摩耗性が低く、織物の強力保持率が低くなり、シート状物の強力は不十分なものとなった。
比較例11で織物の糸条のポリマーをPET-10としたこと以外は、比較例11と同様にしてシート状物を得た。ポリウレタン樹脂が硬く、また微細孔を有する微多孔構造を形成が不十分となり、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、部分的に不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであり、さらに、織物のポリマーPET-10は1,2-プロパンジオールが検出限界以下であるため、ポリマーの耐熱性が不十分で、ポリマーの耐摩耗性が低く、織物の強力保持率が低くなり、シート状物の強力は不十分なものとなった。
比較例11で織物の糸条の撚数をそれぞれ500T/m、5000T/mとしたこと以外は、比較例11と同様にしてシート状物を得た。ポリウレタン樹脂が硬く、また微細孔を有する微多孔構造を形成が不十分となり、ポリウレタン樹脂の研削性が低下したため、得られたシート状物は、部分的に不均一な立毛状態で、柔軟性と耐摩耗性にも劣るものであり、さらに、織物のポリマーPET-7には1,2-プロパンジオールが過剰量含まれているため、ポリマーの耐熱性が不十分で、ポリマーの耐摩耗性が低く、織物の強力保持率が低くなり、シート状物の強力は不十分なものとなった。織物の糸条の撚数が少ない場合には、強力保持率はさらに低くなり、シート状物の強力は不十分なものとなった。撚数が多い場合には、強力保持率はやや改善するものの、シート状物の柔軟性がさらに低下した。
<原綿>
(島成分ポリマー)
島成分ポリマーとして、参考例7で作製したポリマーPET-1を用いた。
海成分ポリマーとして、ビカット軟化点が102℃で、MFRが67.8のポリスチレン(PSt)を用いた。
織編物を構成する繊維のポリマーとして、参考例7で作製したポリマーPET-1を用いた。
上記の島成分ポリマーと海成分ポリマーを用いて、16島/ホールの海島型複合紡糸口金を用いて、紡糸温度が285℃、島/海質量比率が80/20、吐出量が1.4g/分・ホール、紡糸速度が1200m/分の条件で溶融紡糸した。
上記の海島型複合繊維からなる原綿を用い、カード工程とクロスラッパー工程により、積層繊維ウェブを形成し、17枚積層した。次いで、参考例7で作製したポリマーPET-1で製糸した糸条から作製した、糸条の単繊維直径が経糸と緯糸が共に10μm(総繊度84dtex-72フィラメント)で、撚数が2000T/m、織密度が2.54cm(1インチ)当たり95×76(タテ×ヨコ)の平織組織の織物で、前記の積層繊維ウェブを上下に挟み、織物/繊維ウェブ/織物の積層状態にして、トータルバーブデプス0.075mmのニードル1本を植込んだニードルパンチ機を用いて、針深度が7mm、パンチ本数が3000本/cm2でニードルパンチ処理を行い、目付が700g/m2、見掛け密度が0.243g/cm3の織物と海島型複合繊維からなる不織布が積層絡合一体化したシート基体を作製した。得られたシート基体は強力保持率に優れるものであった。
上記のシート基体を98℃の温度の熱水で収縮させた後、5%の濃度のPVA(ポリビニルアルコール)水溶液を含浸し、温度が120℃の熱風で10分間乾燥することにより、シート基体の質量に対するPVA質量が6質量%のシート基体を得た。このシート基体を、トリクロロエチレン中に浸漬して海成分を溶解除去し、極細繊維からなる不織布と織物が絡合してなる脱海シートを得た。このようにして得られた極細繊維からなる不織布と織物とからなる脱海シートを、固形分濃度12%に調整したポリカーボネート系ポリウレタンのDMF(ジメチルホルムアミド)溶液に浸漬し、次いでDMF濃度30%の水溶液中でポリウレタンを凝固させた。その後、PVAおよびDMFを熱水で除去し、110℃の温度の熱風で10分間乾燥することにより、島成分からなる前記の極細繊維と前記の織物の合計質量に対するポリウレタン質量が28質量%の弾性体樹脂付与シート基体を得た。その後、エンドレスのバンドナイフを有する半裁により厚み方向に半裁し、半裁面をJIS#180番のサンドペーパーを用いて3段研削し、立毛を形成させてシート状物を作製した。極細繊維の単繊維径は、4.4μmであった。
織物として、糸条の単糸直径が経糸と緯糸が共に6.0μm(総繊度110dtex-288フィラメント)で、撚数が2000T/m、織密度が2.54cm(1インチ)当たり95×76(タテ×ヨコ)の平織組織の織物を用いたこと以外は、実施例20と同様にしてシート基体を作製後、シート状物を作製した。得られたシート状物は、柔軟性に優れたものであった。結果を表5に示す。
織物として、糸条の単糸直径が経糸と緯糸が共に25μm(総繊度112dtex-16フィラメント)で、撚数が2000T/m、織密度が2.54cm(1インチ)当たり95×76(タテ×ヨコ)の平織組織の織物を用いたこと以外は、実施例20と同様にしてシート基体を作製後、人工皮革(製品)を作製した。得られた人工皮革(製品)は、柔軟性に優れたものであった。結果を表5に示す。
織物を形成するポリマーとして、参考例8で作製したポリマーPET-2を用いたこと以外は、実施例20と同様にして、シート基体を作製後、シート状物を作製した。得られたシート状物は、柔軟性に優れたものであった。結果を表5に示す。
織物を形成するポリマーとして、参考例9で作製したポリマーPET-3を用いたこと以外は、実施例20と同様にして、シート基体を作製後、シート状物を作製した。得られたシート状物は、柔軟性に優れたものであった。結果を表5に示す。
織物を形成するポリマーとして、参考例10で作製したポリマーPET-4を用いたこと以外は、実施例20と同様にして、シート基体を作製後、シート状物を作製した。得られたシート状物は、柔軟性に優れたものであった。結果を表5に示す。
織物として、撚数が3000T/mの平織組織の織物を用いたこと以外は、実施例20と同様にして、シート基体を作製後、シート状物を作製した。得られたシート状物は、柔軟性に優れたものであった。結果を表5に示す。
織物を形成するポリマーとして、参考例13で作製したポリマーPET-7を用いたこと以外は、実施例20と同様にして、シート基体を作製した。シート基体は、強力保持率に乏しかった。
前記シート基体からシート状物を作製した。結果を表6に示す。
島成分ポリマーとして、参考例16で作製したポリマーPET-10を用い、織物を形成するポリマーとして、参考例16で作製したポリマーPET-10を用いたこと以外は、実施例20と同様にして、シート基体を作製した。シート基体は、強力保持率に乏しかった。
前記シート基体からシート状物を作製した。結果を表6に示す。
織物として、撚数が500T/mの平織組織の織物を用いたこと以外は、比較例15と同様にして、シート基体を作製した。シート基体は、強力保持率に乏しかった。
前記シート基体からシート状物を作製した。結果を表6に示す。
織物として、撚数が5000T/mの平織組織の織物を用いたこと以外は、比較例15と同様にして、シート基体を作製した。シート基体は、強力保持率に乏しかった。
前記シート基体からシート状物を作製した。結果を表6に示す。
Claims (6)
- 平均単繊維直径が0.3~7μmの極細繊維からなる不織布と弾性体樹脂からなるシート状物であって、前記極細繊維を構成するポリマーがジカルボン酸および/またはそのエステル形成性誘導体とジオールから得られるポリエステルであり、前記ポリエステル中に1,2-プロパンジオール由来の成分が1~500ppm含有されており、前記弾性体樹脂が、炭素数が3~5のアルカンジオール(a1)に由来する構造単位と炭素数8~20のアルカンジオール(a2)に由来する構造単位を含み、かつ前記アルカンジオール(a1)と前記アルカンジオール(a2)の合計モル数に対する前記アルカンジオール(a2)のモル比率が、50~95モル%である共重合ポリカーボネートジオール(A1)、有機ジイソシアネート(B)および鎖伸長剤(C)を必須構成単量体とするポリウレタン樹脂(D)であることを特徴とするシート状物。
- シート状物の表面に立毛を有し、弾性体樹脂が不織布の内部空間に存在していることを特徴とする請求項1記載のシート状物。
- ポリウレタン樹脂(D)が、さらに炭素数4~6のアルカンジオール(a3)に由来する構造単位からなるポリカーボネートジオール(A2)を必須構成単量体として含有することを特徴とする請求項1または2記載のシート状物。
- 弾性体樹脂が多孔構造を有しており、前記多孔構造の全孔に占める孔径0.1~20μmの微細孔の割合が60%以上であることを特徴とする請求項1から3のいずれかに記載のシート状物。
- 極細繊維を主体とする不織布と織編物が積層一体化されたシート基体と弾性体樹脂からなるシート状物であって、前記織編物がポリエステルを主成分として含む繊維で構成されており、さらに前記ポリエステル中に1,2-プロパンジオール由来の成分が1~500ppm含有されていることを特徴とするシート状物。
- 織編物を構成する糸条の単繊維直径が0.3~50μmである請求項5記載のシート状物。
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TW201902676A (zh) | 2019-01-16 |
RU2756215C2 (ru) | 2021-09-28 |
JP6819683B2 (ja) | 2021-01-27 |
KR102572560B1 (ko) | 2023-08-30 |
RU2019130057A (ru) | 2021-04-29 |
KR20190127719A (ko) | 2019-11-13 |
US20200095725A1 (en) | 2020-03-26 |
EP3604667A4 (en) | 2020-12-23 |
CN110506141A (zh) | 2019-11-26 |
US11441260B2 (en) | 2022-09-13 |
CN110506141B (zh) | 2022-02-11 |
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