WO2008120807A1 - ポリ乳酸組成物およびそれよりなる繊維 - Google Patents
ポリ乳酸組成物およびそれよりなる繊維 Download PDFInfo
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- WO2008120807A1 WO2008120807A1 PCT/JP2008/056628 JP2008056628W WO2008120807A1 WO 2008120807 A1 WO2008120807 A1 WO 2008120807A1 JP 2008056628 W JP2008056628 W JP 2008056628W WO 2008120807 A1 WO2008120807 A1 WO 2008120807A1
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- polylactic acid
- fiber
- acid
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- composition
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- 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
Definitions
- the present invention relates to a polylactic acid composition which gives a molded article having practical strength, heat resistance and disperse dye dyeability, and a fiber comprising the same.
- biodegradable polymers that are degraded in the natural environment have attracted attention and are being studied all over the world.
- biodegradable polymers aliphatic polyesters such as polyhydroxy propylate, poly force prolactone, and polylactic acid are known as biodegradable polymers. These can be melt-molded and are expected to be versatile polymers.
- polylactic acid can produce lactic acid or lactide as raw materials from natural products, and is not only a simple biodegradable polymer, but also a versatile polymer that is friendly to the global environment. It is also being considered for use.
- Biodegradable polymers such as polylactic acid are highly transparent and tough, but they are easily hydrolyzed in the presence of water and, after disposal, decompose without polluting the environment. It is expected as a general-purpose resin with a small amount.
- the melting point of polylactic acid is in the range of 1550 ° C to 1700, and the eye opening is limited to low temperatures for use as a clothing fiber like polyethylene terephthalate nylon, When used as industrial fibers, there are problems such as being unsuitable for applications such as rubber materials and resin-coated fabrics that are exposed to high temperatures of about 150 ° C during the production process.
- Polylactic acid is easily dissolved in common organic solvents such as black mouth form, so it cannot be used for applications that come into contact with organic solvents such as oil. It is.
- poly L-lactic acid consisting of L-lactic acid units only (hereinafter sometimes abbreviated as PLLA) and poly-D-lactic acid consisting only of D-lactic acid units (hereinafter sometimes abbreviated as PDLA) in solution.
- PLLA L-lactic acid units only
- PDLA D-lactic acid units
- This polylactic acid stereocomplex has found interesting phenomena such as high melting point, high crystallinity and improved properties against solvents compared to PLLA and PDLA, and heat resistance that was not possible with conventional polylactic acid fibers.
- Several proposals have been made to improve the properties, for example, iron-resistant fibers.
- Non-Patent Document 1 discloses that a stereocomplex polylactic acid fiber was obtained by melt spinning. Specifically, a non-patent material obtained by melt-spun poly L-lactic acid and poly D-lactic acid was used as a melt-spun product. Although the stereocomplex fiber is obtained by heat-treating the drawn yarn, the molecular orientation inside the fiber is relaxed during the heat-treatment, and the strength of the resulting fiber is only 2.3 c N / dTex.
- the conventional stereocomplex fiber forming method including this non-patent literature is to stretch and heat-set an amorphous undrawn yarn obtained by spinning a blend of poly L-lactic acid and poly D-lactic acid.
- it is effective to heat-set at a temperature equal to or higher than the melting point of poly-lactic acid or poly-D-lactic acid single crystal. It was the mainstream to carry out at a temperature higher than the melting point of the crystal.
- this high-temperature heat setting is effective for the formation of stereocomplex crystals, but in this process, partial melting of the yarn occurred, and there was a problem that the yarn was coarsely cured and its strength was reduced.
- the crystallization ratio (Cr ratio) of high-speed spinning at a spinning speed of 400 O mZ is from 10 to 35%.
- a high strength, heat-resistant polylactic acid fiber of 4.5 c NZdTe X with a low Cr ratio (about 50%) has been proposed by drawing the yarn from 1.4 to 2.3 times (multistage). ing.
- the elongation is less than 20%, it has only insufficient physical properties for clothing and industrial fibers.
- a spinning speed of about 300 OmZ is not sufficient, and it is necessary to set a spinning speed of 5000 mZ or more. To spin at such a spinning speed, a special spinning speed is required. There are still problems that must be overcome in industrial implementation, such as the need for equipment.
- Patent Document 3 the undrawn yarn melt-spun at a spinning draft ⁇ 50 and take-up speed ⁇ 3 O Om is wound up and then stretched or unwound 2.8 times without stretching.
- this document only has a practically sufficient strength as a fiber physical property, and no specific numerical value is shown.
- an iron having a resistance of 200 ° C. and 200 ° C. described in this document is used. Visual contact with the fabric for 30 seconds and then visually observe drastic changes such as fiber fusion and change in the width of the cloth. It is only heat-resistant, and as described in this document, poly L-lactic acid and poly D —A melting peak of a lactic acid single crystal is observed, and due to the melting of the single crystal, it must be determined that the heat resistance is insufficient.
- polylactic acid stereocomplex fibers have a glass transition temperature of 60 ° C, which is about 8 ° C lower than polyethylene terephthalate fibers, which is a typical clothing fiber. Has the advantage of being dyeable.
- polylactic acid fibers have a fiber structure that is more likely to be dyed than polyethylene terephthalate fibers. It has the disadvantage that the child tends to go out, discoloration and contamination, that is, there is a problem with washing durability. It has also become clear that this tendency is often promoted in wet conditions.
- polylactic acid has inherently hydrolysis-shaking properties. Under the dyeing conditions, the fiber amorphous part is hydrolyzed, the crystal part remains selectively, and so-called polylactic acid fibers that are easily dyed are dyed. There are cases where hard areas are generated, and the problem of so-called stained spots remains unresolved.
- polylactic acid molecules have a high light transmittance, and have almost no absorption band from the visible region to around 300 nm in the ultraviolet region, which is extremely advantageous for optical applications.
- the shielding effect by lactic acid molecules is not expected, the dye molecules themselves are easily decomposed, and the fastness to sunlight may be insufficient for practical use.
- Patent Document 5 a fiber structure excellent in black color development, including an aliphatic polyester including polylactic acid having a refractive index in the range of 1.3 to 1.50 and a carboxyl terminal group concentration of 0 to 20 or the like. Mixed fiber structures with seed fibers have been proposed.
- the fiber structure proposed in this patent document does not even suggest any iron resistance at 1700 and high temperature and co-dyeing property with aromatic polyester fibers.
- polylactic acid fiber containing stereocomplex crystals has a strength of 3.5 cN / dTex or more, has an elongation of 20 to 50%, has iron resistance, and has a metric brightness ( Hereinafter abbreviated as brightness. There is. ) L * value of 12 or less, metric chroma (hereinafter abbreviated as “saturation.”) Polylactic acid fibers that can be dyed to C * value of 10 or less have not been proposed yet.
- Patent Document 1 Japanese Unexamined Patent Publication No. 63-241024
- Patent Document 2 Japanese Patent Application Laid-Open No. 2003-293220
- Patent Document 3 Japanese Unexamined Patent Publication No. 2005-23512
- Patent Document 4 Japanese Unexamined Patent Publication No. 2003-49374
- Patent Document 5 Japanese Patent No. 3470676
- Non-Patent Document l Mac romo l c c l e s, 24, 5651 (1991)
- An object of the present invention is to provide a polylactic acid composition and a fiber comprising the same, which give a molded article having practical strength, heat resistance and disperse dye dyeability.
- the polylactic acid (A) composition of the present invention is composed mainly of L-lactic acid unit and polylactic acid (B) component containing 0 to 10 mol% of components other than L-lactic acid unit and D-lactic acid unit as main components.
- D Polylactic acid containing 0 to 10 mol% of components other than lactic acid units (C) component (B) / (C) 1 in weight ratio
- the composition is a polylactic acid stereocomplex composition comprising a mixed composition of 0/90 to 9010. It is essential that the weight average molecular weight of polylactic acid (A) is in the range of 70,000 to 500,000. In such a molecular weight range, the polylactic acid (A) composition has a high stereocomplex crystallinity and is excellent in the ability to produce crystals, which is one of the conditions for producing fibers, and is suitable for dyeing fastness.
- the molecular weight is high.
- the weight average molecular weight of the polylactic acid (A) composition exceeds the above range, the polylactic acid (A) composition A stereocomplex structure and a stereocomplex crystal are difficult to form, and there is a high possibility that the fiber has a loose fiber structure in which large crystals and amorphous structures coexist, which is preferable from the viewpoint of color fastness. It's hard to say.
- single crystals of the polylactic acid (B) component and the polylactic acid (C) component are likely to be formed, and the presence of such crystals in a high proportion is not preferable in terms of heat resistance and dyeing fastness. I guess.
- the weight average molecular weight is preferably in the range of 80,000 to 300,000, more preferably in the range of 90,000 to 250,000, and particularly preferably in the range of 100,000 to 200,000.
- the weight average molecular weight is less than 70,000, it may be difficult to mold the molded product, and at the same time, the dyeability may be poor.
- the amorphous part to which the dye is dyed is susceptible to hydrolysis under the dyeing conditions, so that the ratio of the crystal structure is increased and the colorability is not increased.
- the polylactic acid (A) composition of the present invention has the following formula when DSC measurement shows that the crystal melting peak of the crystal melting peak at 195 ° C or higher is AH msc. It is essential that the stereocomplex crystallinity (C r) specified in (1) is 30 to 55%.
- a polylactic acid (A) composition having such a stereocomplex crystallinity range has a high proportion of stereocomplex crystals, and has a high Cr ratio and a good dyeing fastness, especially for obtaining fibers. This is a necessary condition.
- the stereocomplex crystallinity is low, the stereocomplex crystal structure is difficult to be expressed during fiber formation, and the fiber heat resistance and mechanical strength are hardly expressed. Often, the fastness to light is low even among the fastness to dyeing fibers. If the Cr ratio is low, the molecular structure of the molded product is sparse, and dye molecules are likely to associate, and the relaxation time is prolonged and decomposition is assumed to be accelerated.
- the polylactic acid (B) component In order for the polylactic acid (A) composition to ensure the above-mentioned stereocomplex crystallinity, the polylactic acid (B) component must have crystallinity and its melting point must be 150 ° C or higher and 190 ° C or lower. And more preferably 160 or more and 190 or less. If the polylactic acid component falls within these ranges, when a stereocomplex polylactic acid composition is formed, a higher-melting-point stereocomplex crystal can be formed and the stereocomplex crystallinity can be increased. is there.
- the polylactic acid (B) component used in the present invention preferably has a weight average molecular weight in the range of 100,000 to 500,000, more preferably 140,000 to 250,000.
- the polylactic acid (B) component used in the present invention may contain a copolymer component other than L-monolactic acid as long as its crystallinity is not impaired.
- Poly L monolactic acid which is substantially composed of only L monolactic acid units is preferred. This polylactic acid
- the L monolactic acid unit is 90 to 100 mol%, preferably 95 to 100 mol%, more preferably 98 to 100 mol%.
- the copolymer component units other than L-lactic acid units are 0 to 10 mol%, preferably 0 to 5 mol%, more preferably 0 to 2 mol%.
- hydroxylactic acids such as D-lactic acid, glycolic acid, strong prolactone, ptyrolactone, and proviolactone
- ethylene glycol 1,3-propanediol, 1, 2 —Propanediol, 1,4-propanediol, 1,5-Propanediol, hexanediol, octanediol, decanediol, dodecanediol
- aliphatic diols having 2 to 30 carbon atoms
- succinic acid One or more monomers selected from maleic acid, adipic acid, aliphatic dicarboxylic acid having 2 to 30 carbon atoms, terephthalic acid, isofuric acid, hydroxybenzoic acid, hydroquinone, aromatic diol, aromatic dicarboxylic acid, etc. You can choose.
- the polylactic acid (C) component used in the present invention may contain a copolymer component other than D-lactic acid as long as its crystallinity is not impaired.
- Poly-D-lactic acid that is substantially composed only of D-lactic acid units is preferred. This polylactic acid
- the D-lactic acid unit is 90 to 100 mol%, preferably 95 to 100 mol%, more preferably 98 to 100 mol%.
- the copolymer component units other than D-lactic acid units are 0 to 10 mol%, preferably 0 to 5 mol%, more preferably 0 to 2 mol%.
- this polylactic acid (C) component has crystallinity, and its melting point is preferably 150 ° C. or higher and 190 or lower, and more preferably 160 ° C. or higher and 190 ° C. or lower. preferable. If the polylactic acid component falls within these ranges, when a stereocomplex polylactic acid composition is formed, This is because a higher-melting-point stereocomplex crystal can be formed and the stereocomplex crystallinity can be increased.
- the polylactic acid (C) component used in the present invention may contain a copolymer component other than D-lactic acid as long as its crystallinity is not impaired.
- the copolymerization ratio is not particularly specified, but is preferably less than 10 mol%, more preferably less than 5 mol%, and further preferably less than 2 mol%.
- hydroxy carboxylic acids such as L lactic acid, glycolic acid, force prolactone, ptyrolactone, and proviolactone, ethylene glycol, 1,3-propanediol, 1, 2 —Propanediol, 1,4-propandiol, 1,5-propanediol, hexanediol, octanediol, decanediol, dodecanediol, aliphatic diols having 2 to 30 carbon atoms, succinic acid, malein Select one or more monomers selected from acids, adipic acid, aliphatic dicarboxylic acids having 2 to 30 carbon atoms, terephthalic acid, isofuric acid, hydroxybenzoic acid, hydroquinone and other aromatic diols, aromatic dicarboxylic acids, etc. I can do it.
- hydroxy carboxylic acids such as L lactic acid, glycolic acid, force prolactone, pt
- each of the lactic acids can be produced by a direct dehydration condensation method, or each lactic acid can be once dehydrated and cyclized. Alternatively, it may be produced by a method of ring-opening polymerization after making lactide.
- Any catalyst can be used as long as it can be polymerized so that the polylactic acid (B) component and the polylactic acid (C) component have predetermined characteristics.
- Divalent tin compounds such as tin oxide, tin chloride, tin alkoxide, tin oxide, butyl chloride, tetravalent tin compounds such as ethyltin, metal tin, zinc compound, aluminum compound, calcium compound, lanthanide compound
- Usage lactides in 1 kg 0. 42 X 10- 4 force the catalyst, et 840 X 1 0- 4 further reactive (molar), obtained Borirakuchido such color, stability, polylactic acid (A) the compositions and the to consider the wet heat resistance of the composition molded article from 1. 68 X 1 0- 4 42. 1 X 10- 4 ( mol), particularly preferably from 2. 53 X 10- 4 16. 8 X 10- 4 (mol) used.
- the polylactic acid (B) component and the polylactic acid (C) component are prepared by removing the polymerization catalyst by a conventionally known method, for example, by washing with a solvent, or deactivating the catalyst activity, ie deactivating the polylactic acid (A ) It is preferable because of the melt stability and wet heat stability of the composition and the molded article of the composition.
- the following compounds are exemplified as the deactivator used for the catalyst deactivation of polylactic acid melt-opened and polymerized in the presence of a metal-containing catalyst.
- an organic ligand consisting of a group of chelate ligands having an imino group and capable of coordinating with a specific metal-based polymerization catalyst, and dihydroxoxoline (I) acid, dihydridotetraoxoniline (II) acid Dihydridotetraxonylline (II, II) acid, hydridotrioxoline (III) acid, dihydridopentoxonylline (III) acid, hydridopentoxonoxylin (II, IV) acid, dodecaoxohexaline (III) acid, Hydroxoxotriline (1 1 1, IV, IV) acid, Oxoxotriline (IV, III, IV) acid, Hydrohexoxaxoniline (III, V) acid, Hexazoxillin (IV) acid Decaoxotetralin (IV) acid, Hendocaoxotetralin (IV) acid, Enaxoxo
- polylactic acid (B) component and polylactic acid (C) component used in the present invention are identical to each other.
- melt stability when melted at 2600 ° C. is 20% or less.
- melt stability When the molecular weight is drastically reduced at high temperature, melt molding becomes difficult, and the physical properties of the obtained molded product are lowered, which is not preferable.
- the melt stability can be preferably improved.
- the polylactic acid composition of the present invention is more preferably sheared by allowing the polylactic acid (B) component and the polylactic acid (C) component to coexist, mixing, and heat-treating at 230 to 300 ° C. It can be obtained by melt-kneading both components under the conditions.
- Examples of the mixing apparatus used for melt kneading include a reactor with a batch type stirring blade, a continuous reactor, and a biaxial or uniaxial extruder.
- the two components present in the solid state are mixed uniformly and intimately using a tumbler-type powder mixer, continuous powder mixer, various milling devices, etc. It is preferable to keep it.
- heat treatment at 230-300 ° C means that the polylactic acid (B) component and the polylactic acid (C) component are kept in contact with each other in the temperature range of 230 ° C (: -300 ° C)
- the temperature of the heat treatment is preferably 2 40 to 2 95. More preferably, it is in the range of 2 50 ° C to 29 0 ° C. It is not preferable because it becomes difficult to suppress the decomposition reaction, and when the temperature is lower than 30 ° C., the production of the polylactic acid stereocomplex may be low.
- the heat treatment time is not particularly limited, but is in the range of 0.1 to 30 minutes, preferably 5 to 10 minutes, and more preferably 1 to 10 minutes.
- an inert atmosphere at normal pressure or a reduced pressure can be applied. It is preferable to apply a conventionally known crystallization nucleating agent to the polylactic acid (A) composition of the present invention.
- the stereocomplex crystallinity of the polylactic acid (A) composition can be 30% to 55%, preferably 35% to 55%, and more preferably 37% to 55%.
- a composition having a stereocomplex crystallinity in such a range is suitable for realizing a molded article having excellent heat resistance, mechanical properties and dyeing fastness.
- the stereocomplex crystallinity of the polylactic acid (A) and the polylactic acid molded product formed from the polylactic acid (A) is 90% or more, preferably 95%. More preferably, it can be made 97% or more.
- this is effective for setting the stereocomplex crystallinity, which is a single peak of the high melting point peak due to stereocomplex polylactic acid in DSC measurement, to 100%.
- Such a polylactic acid (A) molded article having a high stereocomplex crystallinity is suitable for realizing high heat resistance and dyeing fastness.
- triclinic inorganic crystallization nucleating agents examples include wollastonite (wo 1 lasut on ite), zo, notlite (xono tol 1 ite), borate stone, magnesium potassium hydrogen carbonate, calcium mesosilicate ( ⁇ ), Calcium calcium silicate (j8) manganese metal silicate, calcium sulfate, cerium sulfate (III), zinc phosphate, zinc dihydrogen phosphate, calcium dihydrogen phosphate, aluminum aluminosilicate, potassium aluminosilicate and the like.
- wollastonite, calcium sulfate, calcium silicate ( ⁇ ), etc. are preferred from the viewpoint of improving stereocomplex crystallinity and dyeing fastness. It is mentioned as a thing.
- phosphoric acid ester metal salt used in the present invention include aromatic organic phosphoric acid ester metal salts represented by the following general formulas (2) and (3).
- Aromatic organophosphate metal salts can be used in combination of one kind, a plurality of kinds or those containing various agents.
- R 2 and R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms
- M e represents an alkali metal atom or an alkaline earth. Represents a similar metal atom, and p represents 1 or 2.
- R 4 , R 5 and R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms
- M 2 represents an alkali metal atom or an alkaline earth metal atom
- p is 1 or Represents 2.
- it represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- Examples of the alkyl group having 1 to 4 carbon atoms represented by are methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, etc. Is exemplified.
- R 2 and R 3 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.
- alkyl group having 1 to 12 carbon atoms include methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, tet-butyl group, amyl Group, tet-amyl group, hexyl group, heptyl group, octyl group, iso-aged octyl group, tet-octyl group, 2-ethyl hexyl group, nonyl group, iso-nonyl group, decyl group, iso-acyl group And the like, and the like, and the like.
- Mi represents an alkali metal atom such as Na, K, or Li, an alkali metal atom such as Mg or Ca, a zinc atom, or an aluminum atom.
- p represents 1 or 2
- Q represents 0 when is an alkali metal atom, alkaline earth metal atom, or zinc atom, and 1 or 2 when is an aluminum atom.
- Preferred examples of the phosphoric acid ester metal salt represented by the formula (2) include those in which Ri is a hydrogen atom and R 2 and R 3 are both tet-butyl groups.
- R 4 , R 5 and R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.
- Examples of the alkyl group having 1 to 12 carbon atoms represented by R 4 , R 5 , and R 6 include a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, and a sec-butyl group.
- M 2 represents an alkali metal atom such as Na, K or Li, an alkali metal atom such as Mg or Ca, a zinc atom or an aluminum atom.
- p represents 1 or 2
- q represents 0 when Mi is an alkali metal atom, alkaline earth metal atom, or zinc atom, and 1 or 2 when is an aluminum atom.
- Preferred examples of the phosphoric acid ester metal salt represented by the formula (3) include those in which R 4 and R 6 are methyl groups and R 5 is a tet-butyl group.
- Metal salts of phosphoric acid ester metal salts that are also commercially available, for example, “Adeka Stub NA—10”, “Adeka Stub NA—1 1”, “Adeka Stub NA—2 1”, “Adeka Stub” “NA-30”, “Adeka Stub NA-35” and the like can also be effectively used for the desired purpose as the phosphoric acid ester metal salt of the present invention.
- ADKA STAB NA-21 containing a phosphoric ester aluminum salt and an organic auxiliary is exemplified as a molded article, and particularly preferred from the viewpoint of fiber properties.
- the amount of the crystallization nucleating agent used is in the range of 0.01 to 5 parts by weight per 100 parts by weight of the polylactic acid (A) composition.
- the range of 0.05 to 4 parts by weight is preferably selected, particularly preferably the range of 0.1 to 3 parts by weight.
- the crystal nucleating agent used in the present invention has a particle size as small as possible, in particular, a small content of large particles exceeding 10 m, which is used for spinning the polylactic acid composition (A) into fibers. From the standpoint of safety, it is preferably from 0.01 to 10 / m for practical use. More preferably, 0.05 to 7 ⁇ m is selected. If the content of large particles exceeding 10 im exceeds 20%, the rate of yarn breakage during polylactic acid fiber spinning increases, which is favorable. It ’s not good.
- a crystal nucleating agent having such a particle size can be easily obtained by pulverizing with a ball mill, a sand mill, a hammer mark lasher, an atomizer, and classifying with various classifiers.
- the polylactic acid (A) composition of the present invention and the molded article of the composition preferably have a carboxyl terminal group concentration of 0.1 to 60 equivalent notons.
- it is in the range of 0.1 to 40 equivalent tons, more preferably 0.2 to 20 equivalent tons, particularly preferably 0.3 to 10 equivalent tons.
- Carboxyl end group blocking agents not only block the carboxy end groups of polylactic acid resin, but also include carboxyl end group lactide, lactic acid, formic acid, pyruvic acid, etc. produced by the decomposition reaction of polylactic acid resin and various additives. It also has the advantage that the resin can be stabilized by sealing the force loxyl end group of the low molecular weight compound.
- the polylactic acid (A) composition since it is possible to seal the hydroxyl terminal group produced by decomposing polylactic acid by the acidic low molecular weight compound or the moisture penetrating into the resin composition, the polylactic acid (A) composition, the composition molding It also has the advantage of improving the durability of the product under wet heat conditions.
- carboxyl terminal group blocking agents include conventionally known carpositimide compounds, epoxy compounds, oxazoline compounds, oxazine compounds, It is preferable to use at least one compound selected from isocyanate compounds, and among them, carpositimide compounds, epoxy compounds, oxazoline compounds, and isocyanate compounds are preferable.
- the calpositimide compound used in the present invention has one or more calpositimide groups in the molecule, preferably contains 0.1 to 5 wt% of isocyanate groups, and has a calpositimide equivalent of 200 to 500.
- carboxyl end group blocking agent one or more compounds can be appropriately selected and used.
- the polylactic acid of the present invention may be sealed with forceful oxyl end groups or acidic low molecular weight compounds depending on the application.
- the polylactic acid in the resin composition may be sealed with carboxyl terminal groups or acidic low molecular weight compounds.
- the force lpoxyl terminal group concentration of 0.1 to 60 equivalents / ton
- the heat and humidity resistance of the polylactic acid (A) composition and the molded article of the composition can be matched with the object of the present invention.
- the polylactic acid (A) composition is preferable from the viewpoint of stability at the time of melt molding processing and hydrolysis resistance, and is more preferably 0.1 to 40 equivalents of Z ton, 0.2 To 20 equivalents of ton, particularly preferably 0.3 to 10 equivalents of ton.
- the amount of the strong lpoxyl end group blocking agent used is preferably from 0.01 to 10 parts by weight, more preferably from 0.03 to 5 parts by weight per 100 parts by weight of the polylactic acid resin (A).
- the amount of the strong lpoxyl end group blocking agent used is preferably from 0.01 to 10 parts by weight, more preferably from 0.03 to 5 parts by weight per 100 parts by weight of the polylactic acid resin (A).
- the amount is less than 0.1%, the effect is hardly recognized and the industrial significance is small.
- a sealing reaction catalyst may be further used.
- the capping reaction catalyst is a compound having an effect of accelerating the reaction between the carboxyl end group capping agent and the polymer end or the carboxyl end group of the acidic low molecular weight compound, and has the ability to promote the reaction with a small amount of addition. Certain compounds are preferred.
- Such compounds include, for example, Al force metal compounds, Al force earth metal compounds, tertiary amines, imidazole compounds, quaternary ammonium salts, phosphine compounds, phosphonium compounds, phosphate esters, organic acids, Lewis acids, Etc.
- Al metal compound an alkaline earth metal compound, or a phosphate ester.
- sodium stearate, potassium stearate, calcium stearate, magnesium stearate, sodium benzoate, sodium acetate, potassium acetate, calcium acetate, and magnesium acetate are preferred.
- the addition amount of the reaction catalyst is not particularly limited, but is preferably 0.001 to 1 part by weight per 100 parts by weight of polylactic acid (A) composition (A), 0.5 part by weight is more preferable, and 0.1 part by weight to 0.1 part by weight is further preferable.
- polylactic acid (A) composition of the present invention conventionally known additives such as plasticizers, antioxidants, light stabilizers, ultraviolet absorbers, heat stabilizers are included within the range not impairing the object of the present invention.
- additives such as plasticizers, antioxidants, light stabilizers, ultraviolet absorbers, heat stabilizers are included within the range not impairing the object of the present invention.
- Agents, lubricants, mold release agents, various fillers, antistatic agents, flame retardants, foaming agents, fillers, antibacterial / antifungal agents, nucleating agents, dyes, pigments and pigments should be included as desired. Can do.
- polylactic acid (A) composition of the present invention an injection molded product, an extruded product, Vacuum / pneumatic molded products, blow molded products, films, sheet nonwoven fabrics, fibers, fabrics, composites with other materials, agricultural materials, fishery materials, civil engineering / building materials, stationery, medical supplies or other molded products
- the molding can be performed by a conventional method.
- the polylactic acid (A) composition of the present invention is suitable for producing a molded article excellent in heat resistance, mechanical properties, and especially fastness to dyeing, particularly fibers by the melt molding method described above.
- the polylactic acid molded product of the present invention has practically excellent mechanical properties, for example, the fiber has a heat shrinkage rate of 0.1 to 15% at 150 ° C, and has a 170 ° C proof resistance. It has a strength of 3.5 cNZdTe x or more and an elongation of 20 to 30%, preferably a strength of 3.8 cNZdTe x or more, and more preferably 4.0 cN / dTe x or more. For use in clothing and industrial use, fibers having a strength of 4.0 c NZdTeX or more are preferred because of their wide practical range of use.
- the polylactic acid fiber of the present invention When the polylactic acid fiber of the present invention is subjected to differential scanning calorimetry (DSC) measurement, it exhibits a single melting peak of a stereocomplex crystal consisting essentially of poly L-lactic acid and poly D-lactic acid, melting point
- the peak temperature is preferably 200 ° C or higher.
- a low-temperature crystal melting phase that is, a homocrystal phase and a high-temperature crystal are usually used depending on the type or composition ratio of the composition component and the preparation conditions of the stereocomplex crystal. It is known that it exhibits at least two endothermic peaks of the melt phase, that is, the stereocomplex crystal phase.
- a polylactic acid homocrystal phase that is, a low-temperature crystal melt phase is substantially observed. Only a single melting peak of the high-temperature crystal melting phase is seen.
- the melting start temperature of the high-temperature crystal melting phase is 190 ° C or higher, preferably Is over 200 ° C.
- the polylactic acid fiber in the present invention preferably has a Cr ratio of 30 to 100% obtained from the integrated intensity of the stereocomplex crystal diffraction peak by wide-angle X-ray diffraction measurement.
- stereocomplex polylactic acid fibers whose entire crystal phase consists only of a high-temperature crystalline melted phase are not likely to melt and melt when they are ironed.
- the fabric quality and texture of the fabric are not impaired by the hail, and it is considered preferable.
- the low-temperature crystal phase is converted into the high-temperature crystal phase by carrying out fiber drawing and heat setting at 170 ° C or higher, for example, about 190 ° C, which is higher than the melting point of the low-temperature crystal melt phase. Is intended to be higher than 90%.
- the fiber strength is 3 cN / dTe X or less, and in the fiber structure, homocrystal melting, stereocomplex crystals. Because it is recrystallized, it contains a vacant structure, the fastness to dyeing is low, and the range of use is greatly limited as a textile product premised on dyeing.
- the Cr ratio in molded articles, particularly fibers is more preferably in the range of 30 to 90%, particularly preferably in the range of 35 to 85%, and particularly preferably in the range of 40 to 80%.
- the polylactic acid fiber maintains high dyeing fastness, and there is almost no problem of light coloration during dyeing, and the disperse dye, Di an ix B 1 ack BG _ FS, Obtains polylactic acid fibers with excellent heat resistance that can be dyed with a metric lightness L * value of 12 or less and a metric chroma C * value of 10 or less, and that do not impair the fabric quality and texture of the fiber product.
- Fiber strength is 3.5 cN / dTe x or more, preferably 3.9 cN // dTe x or more, more preferably Can obtain a high strength of 4.0 cN no dTe x or more.
- the metal ions in the poly L-lactic acid and poly D-lactic acid chip resins used for spinning are 100 ppm or less.
- the metal ion here is at least one metal selected from the group consisting of alkaline earth metals, rare earths, transition metals of the third period, aluminum, germanium, tin, and antimony.
- the content of the compound having a molecular weight of 150 or less is 0.001 to 0.2% by weight.
- the content of the compound having a molecular weight of 150 or less is preferably 0.001 to 0.2% by weight.
- Examples of the compound having a molecular weight of 150 or less include D-lactide, L-lactide, L monolactic acid, D-lactic acid, formic acid, pyruvic acid, pyruvine aldehyde, acetic acid, and water. If the total content of these compounds exceeds 0.2% by weight based on the weight of the composition (A), the heat resistance of the resulting composition (A) and the composition will be poor.
- the content of these low molecular compounds is in the range of 0.001 to 0.1% by weight, more preferably 0.002 to 0.05% by weight, particularly preferably 0.02 to 0.01% by weight. .
- These low molecular weight compounds may be mixed from the outside during the production of polylactic acid (B), polylactic acid (C) and composition (A), or may be generated internally by resin decomposition. Therefore, it is preferable that these low molecular compounds in the polylactic acid (B), the polylactic acid (C), and the composition (A) are appropriately reduced by a reduction means.
- D-lactide, L-lactide, L monolactic acid, and D-lactic acid are reduced during the production of polylactic acid (B) and polylactic acid (C), such as water or inert gas. It can be reduced by using devolatilization or vacuum devolatilization with or without an auxiliary agent such as water, and it is preferable to reduce it. It can be easily reduced by heat drying treatment, and it is convenient and preferable to reduce it in that way.
- the polylactic acid (A) composition is melt-molded and melt-spun in a state where the moisture content is 100 ppm or less.
- the moisture content is high, hydrolysis of the poly-L monolactic acid component and the poly-D-lactic acid component is promoted, the molecular weight is remarkably reduced, and melt molding becomes difficult. It is not preferable because the properties are lowered.
- the amount of lactide remaining in the polylactic acid fiber of the present invention is preferably not more than 400 ppm.
- melt lactation and melt spinning are performed after the amount of lactide in the polylactic acid composition is set to 400 ppm or less.
- the lactide contained in the polymer may vaporize during melt forming and melt spinning, which may cause contamination of the molded product and cause unevenness. It is preferable for the purpose of obtaining a good molded product to keep it to 0 ppm or less.
- the polylactic acid shaped article and fiber of the present invention can be preferably produced by a conventionally known melt molding method or melt spinning method, for example, by the following method, but is not limited to these methods.
- the polylactic acid fiber of the present invention can be obtained by subjecting a polylactic acid (A) composition, which is a blend of a polylactic acid (B) component and a polylactic acid (C) component, to normal melt spinning.
- a polylactic acid (B) component and the polylactic acid (C) component there is a method of subjecting the chip blend to melt spinning.
- the melt extruder a pressure melt type, a single screw or a twin screw is used.
- a normal melt extruder such as a torder type can be used.
- the uniaxial or biaxial Xtruder type is preferred That's right. Furthermore, after a chip blend of a chip of polylactic acid (B) component and a chip of polylactic acid (C) component is melted in a kneader, it is made into chips and a polylactic acid (A) composition chip is prepared, A method of subjecting this chip to melt spinning is preferred. Furthermore, it is preferable to incorporate a static kneader in the polymer flow path in order to improve the kneadability.
- the polylactic acid (A) composition described above is melted in an extruder type melter type melt extruder, weighed with a gear pump, filtered in a pack, and then provided in a base. Discharged from the nozzle.
- the shape of the base and the number of bases are not particularly limited, and any of circular, irregular, solid, hollow, etc. can be adopted.
- the discharged yarn is immediately cooled and solidified, then bundled, added with oil, and wound.
- the winding speed is not particularly limited, but is preferably in the range of 300 m / min to 500 O m / min because a stereocomplex crystal is easily formed. From the viewpoint of drawability, a winding speed at which the Cr ratio of the undrawn yarn by wide-angle X-ray diffraction is 0% is preferable.
- a polylactic acid (A) composition is discharged from a discharge hole with a pack temperature of 2 20 to 2 60 and an LZ d of 2 to 10 and rapidly cooled with cold air of 50 ° C or less after discharge.
- a spinning draft of 0.1 to 50 and spinning speed of 300 to 500 OmZ the wide-angle X-ray diffraction is performed. It is possible to obtain an undrawn yarn having substantially zero crystallinity.
- the undrawn yarn that has been wound is then used for the drawing process, but the spinning process and the drawing process do not necessarily need to be separated, and a direct spinning drawing method is used in which the drawing is continued without being wound up after spinning. It doesn't matter.
- the drawing may be one-stage drawing or two-stage or more multi-stage drawing.
- the draw ratio is preferably 3 times or more, and more preferably 4 times or more. Preferably 3 to 10 times is selected.
- the draw ratio is too high, the fiber is devitrified and whitened, which reduces the strength of the fiber. It ’s not good.
- preheating methods for stretching include roll temperature rise, flat plate or pin-shaped contact heating heaters, non-contact hot plates, and heat transfer baths. That's fine.
- the stretching temperature is selected from the polylactic acid glass temperature to 1700 ° (: preferably 70 to 140 ° t: particularly preferably 80 to 13O.
- the heat setting temperature is more preferably (stretching temperature + 5) to 1700 ° C, particularly preferably (stretching temperature + 5 ° C) to 150 ° C (:, particularly preferably (stretching temperature + 10 ° C ) To 1550 ° C is selected.
- the polylactic acid fiber of the present invention can also be used as a raw yarn for processed yarn such as false twisted yarn, mechanical crimped yarn or indented crimped yarn. In addition to long fibers, short fibers and spun yarns using the same can also be used.
- the polylactic acid fiber may be used alone, or other kinds of fibers may be mixed.
- Other fibers that may be mixed with the polylactic acid fiber of the present invention include polyesters other than polylactic acid, synthetic fibers such as acrylic, nylon and aramid, natural fibers such as silk, cotton, hemp, and animal hair, viscose rayon. And regenerated cellulosic fibers such as cuvula and polynosic, and solvent-spun cellulose fibers such as lyocell.
- the mixing ratio of both can be arbitrarily set according to the application. If the mixing ratio of polylactic acid fiber is too low, Sex is hardly reflected. Accordingly, when polylactic acid is used in combination with other types of fibers, it is preferable to mix at least 5% by weight of polylactic acid fibers.
- the high heat resistance, high strength, low shrinkage and dyeing fastness fibers of the present invention can take the form of various textile products such as woven fabrics, knitted fabrics, non-woven fabrics, and molded articles such as cups.
- the high strength, high Cr heat resistance and low shrinkage fibers of the present invention are specifically used for clothing such as jackets, blousons, pants and coats, used for clothing materials such as cups and pads, curtains, and pets It can be suitably used for interior applications such as mats and furniture, industrial materials such as belts, nets, ropes, heavy cloths, bags, felts and fills, and vehicle interiors.
- clothing such as jackets, blousons, pants and coats
- clothing materials such as cups and pads, curtains, and pets
- interior applications such as mats and furniture, industrial materials such as belts, nets, ropes, heavy cloths, bags, felts and fills, and vehicle interiors.
- the weight average molecular weight of the polymer was determined by GPC (column temperature 4 Ot: black mouth form) in comparison with a polystyrene standard sample.
- ⁇ I sc i and I HM were estimated by subtracting diffuse scattering due to amorphous material in the diffraction intensity profile in the equator direction.
- X-ray source Cu— Ko; ray (Confocal Mirai)
- the content of compounds with a molecular weight of 150 or less in the polylactic acid (A) composition was determined by GPC.
- the amount of residual lactide in the polylactic acid (A) composition was determined by GPC.
- a 10 cm square fabric was prepared from the sample fibers, and ironed for 30 seconds with an iron adjusted to a surface temperature of 170 ° C. The heat resistance was judged from the change in fabric shape and texture.
- a pile fabric (velour) obtained by knitting the obtained polylactic acid fiber with polyethylene terephthalate fiber was produced and scoured at 80 ° C. for 20 minutes, and then scoured at 15 Ot: for 20 minutes.
- This fabric is dyed in a dye bath under the following conditions for 130V XI hours, followed by reduction treatment at 60 ° C for 20 minutes using an aqueous solution containing 0.5 gZ of caseo soda and hydrosulfite 0.2 / 1.
- the L * value is the metric brightness in the L * ⁇ a * ⁇ b * color display. The smaller the value, the deeper the black color.
- the value is preferably 8 or less, more preferably 6 or less.
- the metric chroma C * value is the saturation defined by (a * 2 + b * 2 ) 1 2 , and the smaller the value, the more achromatic and blackish black appears.
- a 10 cm square fabric for evaluation was prepared from polylactic acid fibers, and the sample fabric was exhausted and dyed at 110 ° C. for 60 minutes in the following disperse dye aqueous solution at a bath ratio of 1:30. After dyeing, dehydration and drying were performed, and the following reduction cleaning solution was used for reduction cleaning at a bath ratio of 1:30 at 70 ° C. for 20 minutes, followed by dehydration and drying to obtain a dyed fabric.
- the fastness was evaluated in accordance with JIS-L-0842-1996 by an ultraviolet ray-powered bon-arc lamp test. The results are J I S, grades 5 to 6 are ⁇ , grades 4 to 5 are ⁇ , 4 or more pass, and less than 4 fail.
- Disperse dye dye aqueous solution Disperse dye dye aqueous solution:
- Resin chips or pellets and fabric were used as samples, and L * ⁇ a * ⁇ b * values were measured with a Z-100 1 DP color difference meter manufactured by Nippon Denshoku Co., Ltd.
- the yarn temperature was 180 ° C at 3 m below the pack immediately after discharge, and cooled by 10 ° C cold air from the spinning cylinder, and was already 90 ° C below the crystallization temperature at 2 m under the pack.
- the yarn was bundled, an oil agent was added, and the undrawn yarn was wound up at a spinning speed of 50 OmZ.
- the spinning draft was 45.
- the pellets of the polylactic acid (A) composition obtained by pelletizing the polylactic acid (A) composition without discharging it from the melt spinning machine have a weight average molecular weight of 160,000 and a concentration of 15 eq.
- the Cr content was 31%, the Cr ratio was 90%, the content of compounds having a molecular weight of 150 or less was 0.05, and the residual lactide content was 400 ppm.
- the undrawn yarn had a Cr of 35% and a Cr ratio of 0%.
- the undrawn yarn was preheated at 90 ° C to 4.9 times, and then heat-set at 140 ° C. A polylactic acid fiber of 0 dtex / 36 fi 1 was obtained.
- the obtained drawn yarn was obtained as a single product of a stereocomplex crystal consisting of poly-lactic acid and poly-D-lactic acid in differential scanning calorimetry (DSC) measurement.
- a melting peak was exhibited, and the melting point was 224 ° C.
- the Cr ratio in wide-angle X-ray diffraction measurement was 45%, the fiber strength was 4.6 c N / dtex, and the elongation was 35%.
- the ironing resistance was good and acceptable.
- the dyeing fastness was acceptable.
- Example 1 polylactic acid fiber was obtained by changing the heat setting temperature only to 110, 130T :, 150 ° (:, 170 ° C, 180 ° C, 200 ° C. The obtained fiber was measured by DSC. 1 shows a single melting peak of the stereocomplex crystal, and both melting points were 200 ° C. or higher The results are shown in Tables 1 and 2 together with Example 1.
- Polymer B 1 A polymer of 160 dte xZ36 fil was prepared in the same manner as in Example 1 except that a chip blend with a weight ratio of C 1 ⁇ 50/50 was prepared, and only the melting temperature was changed to 260. Lactic acid fibers were obtained.
- the pellet of the polylactic acid (A) composition obtained by pelletizing the polylactic acid (A) composition without discharging from the melt spinning machine has a weight average molecular weight of 160,000 and a carboxyl end group concentration of 15 equivalents.
- the Cr content was 31%, the Cr ratio was 90%, the content of compounds having a molecular weight of 150 or less was 0.05, and the residual lactide content was 400 ppm.
- Cr of undrawn yarn is 38%, (: 1 to 0%, drawn yarn is a single melting peak of stereocomplex crystal consisting of poly-lactic acid and poly-D-lactic acid in DSC measurement.
- the melting point was 215 ° C
- the Cr ratio was 47%
- the fiber strength was 4.7 c N / dtex
- the elongation was 31%, which was sufficient for practical use. Ironing resistance and dyeability were also acceptable.
- Production Example 3 the same operation was carried out except that D-lactide having an optical purity of 99.8% was used instead of L-lactide having an optical purity of 99.8%, and a weight average molecular weight of 150,000, Polymer C 2 having a carboxyl end group concentration of 32 equivalent tons, a low molecular weight compound content of 0.03 wt% and a residual lactide content of 30 Oppm was obtained.
- the polymer B 2 chip and polymer C 2 chip obtained by the operation of Production Example 3 and the polymer C 2 chip were mixed at a weight ratio of 1Z1, dried at 120 ° C for 5 hours, and then a carboxyl end-capping agent.
- Nisshinbo Co., Ltd. “Calpolite” LA-1 and ADEKA phosphoric acid ester metal salt “Adekastab NA21” with an average particle size of 0 as the crystallization nucleating agent were added to 0.3 and 100 parts by weight of polylactic acid, respectively. 0.1 part by weight was blended and melt kneaded with a twin-screw kneader at a cylinder temperature of 270 ° C.
- polylactic acid (A) composition pellets had a weight average molecular weight of 120,000, a carboxyl end group concentration of 7 equivalents of Z tons, a Cr of 41%, and a Cr ratio of 98%.
- polylactic acid (A) composition pellets as a material, Sumitomo Heavy Industries Made by neo-pine ⁇ N150 75 injection molding machine with a cylinder temperature of 260 ° C, a mold temperature of 60 ° C, a molding cycle of 150 seconds, and molding 100 mm of 3 mm thick molded pieces for ASTM measurement.
- the 10-shot molded product was visually checked for distortion and black foreign matter. Runs with no distortion or black foreign matter are accepted ( ⁇ K), runs with obvious distortion or black foreign matter are rejected (NG), and runs with minute foreign matter or fine distortion are retained ( ⁇ ) was evaluated as ⁇ .
- the moldability evaluation sample was dyed in the same manner as the fiber, and the dyeing fastness was evaluated. Light fastness was evaluated by visual judgment. Passes that have almost no color spots, those that have almost no discoloration in light, those that have large color spots, and light fastness have passed the same conditions as fibers, and those that have large discoloration in light have failed. there were.
- the polylactic acid (ii) composition chip produced in Example 7 was melted at 240 ° C using a melt spinning machine equipped with a single screw rudder, and 40 g / min from a die having 36 holes of 0.25 ⁇ . It was discharged. Immediately after discharge, the temperature under the pack was 180 ° C, cooled by a spinning cylinder, converged, added oil, and wound up undrawn yarn at a speed of 500 mZ. This undrawn yarn with 0% Sc conversion was drawn 4.9 times at 90 ° C preheating, and then heat-set at 140 ° C to obtain a polylactic acid fiber of 160 dte X 36 fi 1.
- the obtained drawn yarn showed a single melting peak of a stereocomplex crystal composed of poly-monolactic acid and poly-D-lactic acid in a differential scanning calorimeter (DSC) measurement, and the melting point was 224 ° C.
- the Cr ratio in wide-angle X-ray diffraction measurement was 47%
- the fiber strength was 4.7 c NZ d tex
- the elongation was 35%.
- the strength and ironing resistance were satisfactory and passed.
- the dyeability of the fiber was OK and the fastness was acceptable.
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Abstract
Description
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EP08739738A EP2138542A1 (en) | 2007-03-30 | 2008-03-27 | Polylactic acid composition and fiber composed of the same |
US12/593,810 US20100130699A1 (en) | 2007-03-30 | 2008-03-27 | Polylactic acid composition and fiber thereof |
JP2009507559A JPWO2008120807A1 (ja) | 2007-03-30 | 2008-03-27 | ポリ乳酸組成物およびそれよりなる繊維 |
BRPI0809457-8A BRPI0809457A2 (pt) | 2007-03-30 | 2008-03-27 | Composição de ácido polilático, artigo moldado de ácido polilático, produto de fibra, e, processo para produção de uma fibra de ácido polilático |
CN200880018168A CN101679733A (zh) | 2007-03-30 | 2008-03-27 | 聚乳酸组合物和由其形成的纤维 |
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WO2009081996A1 (ja) * | 2007-12-20 | 2009-07-02 | Teijin Limited | 染色された繊維構造体の製造方法 |
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JP2012001569A (ja) * | 2010-06-14 | 2012-01-05 | Teijin Ltd | ポリエステル樹脂組成物の製造方法 |
JP2012001593A (ja) * | 2010-06-15 | 2012-01-05 | Teijin Ltd | 樹脂組成物の製造方法 |
JP2012001594A (ja) * | 2010-06-15 | 2012-01-05 | Teijin Ltd | 樹脂組成物の製造方法 |
JP2012001595A (ja) * | 2010-06-15 | 2012-01-05 | Teijin Ltd | 樹脂組成物の製造方法 |
JP2012001620A (ja) * | 2010-06-16 | 2012-01-05 | Teijin Ltd | ポリ乳酸組成物およびそれからなる成形品 |
WO2015129920A1 (ja) * | 2014-02-27 | 2015-09-03 | 帝人株式会社 | 繊維 |
JP2018500422A (ja) * | 2014-12-22 | 2018-01-11 | ピュラック バイオケム ビー. ブイ. | ポリラクチド成形品およびその製造法 |
CN105133081A (zh) * | 2015-10-21 | 2015-12-09 | 浙江海正生物材料股份有限公司 | 一种耐热型聚乳酸纤维及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
US20100130699A1 (en) | 2010-05-27 |
KR20100016017A (ko) | 2010-02-12 |
CN101679733A (zh) | 2010-03-24 |
BRPI0809457A2 (pt) | 2014-09-09 |
JPWO2008120807A1 (ja) | 2010-07-15 |
EP2138542A1 (en) | 2009-12-30 |
TW200909512A (en) | 2009-03-01 |
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