CN106835406B - Fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber and preparation method thereof - Google Patents
Fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber and preparation method thereof Download PDFInfo
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- CN106835406B CN106835406B CN201611159256.2A CN201611159256A CN106835406B CN 106835406 B CN106835406 B CN 106835406B CN 201611159256 A CN201611159256 A CN 201611159256A CN 106835406 B CN106835406 B CN 106835406B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/16—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/82—Textiles which contain different kinds of fibres
- D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
- D06P3/8223—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups
- D06P3/8228—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using one kind of dye
- D06P3/8233—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using one kind of dye using dispersed dyes
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Dispersion Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
- Woven Fabrics (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention discloses a fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber, which is formed by blending or interweaving the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated fiber, wherein the aromatic polyester-aliphatic polyester block copolyester is formed by polycondensation of a polyethylene glycol terephthalate oligomer and aliphatic polyester straight-chain dibasic acid side group dihydric alcohol ester polyol, and has the following structural units:
wherein x is more than 4 and less than 100, y is more than 1 and less than 25, R1Is C2-C8 alkylene, R2Is C3-C8 alkylidene, and the randomness B of the aromatic polyester-aliphatic polyester block copolyester is more than or equal to 0.05 and less than or equal to 0.95; dye molecules can enter the fiber at a lower temperature, so that the normal-pressure dyeing of the disperse dye is realized, the dip-dyeing temperature is below 100 ℃, and the hot-melt dyeing temperature is below 185 ℃.
Description
Technical Field
The invention relates to a fabric and a preparation method thereof, in particular to a fabric containing aromatic polyester-aliphatic polyester block copolyester fibers and regenerated cellulose fibers and a preparation method thereof.
Background
The polyester fiber is the textile fiber with the largest dosage at present, and has the advantages of high breaking strength, good form stability, easy washing, quick drying and the like. However, the conventional polyester fiber has high crystallinity and orientation degree, lacks active groups, is not easy to dye, can only be dyed by disperse dye under the conditions of high temperature and high pressure, and has high energy consumption. Because of some defects of polyester fiber, the most widely used method is to blend or interweave polyester fiber with other fibers to achieve better overall performance in the aspect of clothing, and the most typical application is to blend or interweave the polyester fiber with cellulose fiber.
Although the traditional polyester fiber and cellulose fiber blended or interwoven fabric is greatly improved in the aspect of wearing comfort compared with a pure polyester fiber fabric, the polyester fiber still needs to be dyed at high temperature and high pressure under the weak acid condition, the dip-dyeing temperature is generally within the range of 120-.
The patent with the application number of 201110366748.X discloses a dyeable modified copolyester fiber of an atmospheric disperse dye, which is formed by spinning modified copolyester, wherein the copolyester contains aliphatic dihydric alcohol which is provided with a side chain and has the carbon atom number of less than 6 as a third monomer. Due to the introduction of a diol structural unit with a side chain in a main chain of a polyester molecule, the regularity of macromolecules is reduced, the crystallization capacity is weakened, the content of an amorphous region is increased, and the structure is loose, so that the copolyester fiber disperse dye is endowed with the normal-pressure dyeability, but the defects that the copolyester fiber has poor dimensional stability and is easy to shrink to a large extent under the condition of boiling water are also brought.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
The invention aims to provide a fabric containing aromatic polyester-aliphatic polyester block copolyester fibers and regenerated cellulose fibers, which is optimized in terms of macromolecular structure design, overcomes the defect that the traditional polyester and regenerated cellulose fiber blended or interwoven product needs higher temperature for dyeing, enables the production process to be lower carbon and more environment-friendly, and is soft in hand feel and better in wearing comfort due to low fiber rigidity.
The second purpose of the invention is to provide a preparation method of the fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber, which is simple and can be suitable for industrial production.
In order to realize the first purpose of the invention, the invention adopts the following technical scheme:
a fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber is formed by blending or interweaving the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated fiber, wherein the aromatic polyester-aliphatic polyester block copolyester is formed by polycondensation of a polyethylene terephthalate oligomer and aliphatic polyester straight-chain dibasic acid side group dihydric alcohol ester polyol, and has the following structural units:
wherein x is more than 4 and less than 100, y is more than 1 and less than 25, R1Is C2-C8 alkylene, R2Is C3-C8 alkylidene, and the randomness of the aromatic polyester-aliphatic polyester block copolyester is more than or equal to 0.05 and less than or equal to 0.95.
The copolyester in the randomness range is block copolyester, the regularity of macromolecular chains is good, and the crystallization capacity is strong, so that the spun fiber has good dimensional stability, and the boiling water shrinkage can completely meet the requirements of subsequent processing.
The randomness B has four conditions of 0, 1,2 and <1, wherein B ═ 0 represents that the polymer is a blend of homopolymers or a long-block copolymer; b ═ 1 indicates that the copolymer is randomly distributed; b2 represents that the copolymer is completely alternate sequence distribution, B <1 represents that the copolymer has the tendency to become a block copolymer, the invention provides the copolyester which controls the degree of randomness B to be within the range of 0.05-0.95, and represents that the copolymer has the tendency to become a block copolymer, but does not become a long block copolymer formed by an aromatic polyester homopolymer and an aliphatic polyester homopolymer.
According to the scheme, the proportion of the aromatic polyester block in the copolyester is larger than that of the aliphatic polyester block, so that the aliphatic polyester block is utilized to increase the flexibility of a molecular chain segment on the premise of ensuring the regularity and the dimensional stability of a molecular chain of the copolyester, so that the copolyester has stronger crystallization capacity and higher thermal performance, and meanwhile, the condition that the dyeing performance is caused by the aromatic polyester with a long block with high regularity is avoided, and the regularity is damaged because the aromatic polyester cannot form a long chain due to the randomness of the dispersion of structural units in a random copolymer; in the block copolymer formed by homopolymer, the aromatic polyester segment and the aliphatic polyester segment are strictly separated, and the requirements on crystallization capacity and dyeing function can not be met. Therefore, the invention selects the aromatic polyester-aliphatic polyester block copolyester with the randomness of 0.05-0.95 of B.
In the present invention, the long block copolymer is a copolymer obtained by polymerizing two segments of an aromatic polyester homopolymer and an aliphatic polyester homopolymer, and has an arrangement of AAAAAAA … … BBBBBB … ….
The aromatic polyester-aliphatic polyester block copolyester fiber can be in the form of short fiber or filament, and comprises fully drawn yarn FDY and false twist textured yarn DTY; the regenerated cellulose fiber of the invention is a fiber spun by taking cellulose as a main raw material, and the form of the regenerated cellulose fiber can be short fiber or filament, and can be white fiber or colored fiber colored by stock solution.
The further scheme of the invention is as follows: the ratio of x to y is 4-54: 1.
For the purpose of the present invention, the aromatic polyester block in the aromatic polyester-aliphatic polyester block copolyester occupies more components than the aliphatic polyester block, in order to ensure the dimensional stability of the copolyester.
Further, the polymerization degree of the ethylene terephthalate oligomer is 1-8.
The ethylene terephthalate oligomer within the polymerization degree range has proper terminal hydroxyl content, can be subjected to alcoholysis reaction with aliphatic polyester straight chain dibasic acid side group dibasic alcohol ester polyol to realize depolymerization of the aliphatic polyester straight chain dibasic acid side group dibasic alcohol ester polyol, does not need higher temperature when an aromatic polyester-aliphatic polyester block copolyester fiber blended or interwoven product formed within the polymerization degree range of 1-8 is dyed, and is easier to dye at the dip-dyeing temperature of 100 ℃, so that the production process is lower-carbon and environment-friendly, and the fabric is soft in handfeel and better in wearing comfort due to low fiber rigidity.
Further, the intrinsic viscosity of the aromatic polyester-aliphatic polyester block copolyester is 0.5-1.2 dL/g; the melting point is 160-250 ℃, and preferably 210-250 ℃;
the glass transition temperature is 40-77 ℃;
the hue b value is 1-8;
the content of diethylene glycol is less than or equal to 1.5 percent.
In the invention, the method for testing the intrinsic viscosity comprises the following steps: refer to GB/T14190-.
The aromatic polyester-aliphatic polyester block copolyester has the performance index within the range and good spinning processability. And the glass transition temperature and the melting point of the aromatic polyester-aliphatic polyester block copolyester are only one, which shows that the aliphatic polyester straight-chain dibasic acid side group dihydric alcohol ester polyol is embedded into a polyethylene terephthalate molecular main chain in the polycondensation process, and the aliphatic polyester straight-chain dibasic acid side group dihydric alcohol ester chain segment and the polyethylene terephthalate chain segment have better compatibility, no obvious phase separation occurs, the formed fiber has low rigidity, the fabric has soft hand feeling, and the fiber is easy to dye, and the cellulose fiber is blended or interwoven to achieve better comprehensive performance.
Further, the content of the aromatic polyester-aliphatic polyester block copolyester fiber in the fabric is 10-90%, preferably 60-80%.
The aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber are blended or interwoven in the range, so that the defect that the traditional polyester and regenerated cellulose fiber blended or interwoven product needs higher temperature for dyeing can be overcome, the production process is lower carbon and more environment-friendly, and the fabric is soft in hand feeling and better in wearing comfort due to low fiber rigidity.
Further, the aliphatic linear dibasic acid in the aliphatic polyester linear dibasic acid side group dihydric alcohol ester polyol is selected from succinic acid, adipic acid or sebacic acid, and the aliphatic side group dihydric alcohol is selected from 1, 2-propylene glycol, methyl propylene glycol, neopentyl glycol, 2-methyl-2, 4-pentanediol, 3-methyl-1, 5-pentanediol or trimethyl pentanediol.
The introduction of aliphatic polyester chain segment in polyethylene glycol terephthalate molecular skeleton increases the flexibility of molecular chain, the glass transition temperature of copolyester is obviously lower than that of polyethylene glycol terephthalate, and the spun fiber has larger disperse dye molecular diffusion coefficient than that of conventional polyester.
In addition, the dihydric alcohol in the aliphatic polyester chain segment is the side group dihydric alcohol, and the existence of the side group reduces the regularity of the molecular structure of the copolyester and increases the distance between molecules, so that the molecular structure of the amorphous region of the copolyester becomes looser, dye molecules are easier to diffuse and adsorb into fibers spun by the copolyester, and the fibers spun by the copolyester have excellent normal pressure dyeing performance of the disperse dye.
Further, the number average molecular weight of the aliphatic polyester linear dibasic acid side group dihydric alcohol ester polyol is 300-1000.
The aliphatic polyester straight chain dibasic acid side group dihydric alcohol ester polyol in the molecular weight range has proper molecular chain segment length, and can meet the requirement that the aliphatic polyester straight chain dibasic acid side group dihydric alcohol ester segment is embedded into a polyethylene terephthalate molecular skeleton through ester exchange reaction in the subsequent polycondensation process.
Further, the regenerated cellulose fiber includes various kinds of fibers, preferably, viscose, modal or tencel, which are made of the regenerated cellulose fiber.
In order to achieve the second purpose of the invention, the invention adopts the following technical scheme:
the preparation method of the fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber comprises dyeing and finishing.
Further, the dyeing adopts disperse dye dyeing or one-bath one-step dyeing.
Furthermore, the dip-dyeing temperature is 80-100 ℃, the hot-melt dyeing temperature is 160-185 ℃, and the dye-uptake is more than 85%.
The preparation method of the aromatic polyester-aliphatic polyester block copolyester comprises the following steps:
(1) adding a proper amount of catalyst into a mixture of terephthalic acid and ethylene glycol with a molar ratio of 1: 1.05-2 to prepare slurry;
(2) performing esterification reaction on the slurry prepared in the step (1) to obtain an ethylene terephthalate oligomer;
(3) adjusting the temperature of the ethylene terephthalate oligomer prepared in the step (2) to 200-250 ℃, uniformly mixing the ethylene terephthalate oligomer with the aliphatic dibasic acid dihydric alcohol ester polyol added on line, and then carrying out a pre-polycondensation reaction to obtain a copolyester prepolymer;
(4) carrying out final polycondensation reaction on the copolyester prepolymer prepared in the step (3) to obtain a copolyester melt;
(5) and (4) filtering the copolyester melt obtained in the step (4), cooling and solidifying to obtain copolyester slices.
In the present invention, the catalyst is a catalyst commonly used in the art for preparing ethylene terephthalate, and is well known in the art.
The aromatic polyester-aliphatic polyester block copolyester is generated by an ester exchange reaction between a polyethylene glycol terephthalate oligomer and an aliphatic dibasic acid glycol ester polyol in the polycondensation process, and the degree of the ester exchange reaction can be regulated by regulating and controlling the conditions of the polycondensation reaction, so that the aim of regulating and controlling the lengths of a polyethylene glycol terephthalate chain segment and an aliphatic dibasic acid glycol ester chain segment is fulfilled. Because the copolyester is block copolyester, the regularity of macromolecular chain is good, and the crystallization ability is stronger, so the spun fiber has good size stability, and the boiling water shrinkage can completely meet the requirement of the subsequent processing.
The aromatic polyester-aliphatic polyester block copolyester has only one glass transition temperature and melting point, which indicates that the on-line added aliphatic dibasic acid dihydric alcohol ester polyol is embedded into the main chain of polyethylene glycol terephthalate molecules in the polycondensation process, and the aliphatic dibasic acid dihydric alcohol ester chain segment and the polyethylene glycol terephthalate chain segment have better compatibility and do not have obvious phase separation.
According to the above process, the polymerization degree of the ethylene terephthalate oligomer in the step (2) is 1 to 8.
According to the method, the number average molecular weight of the aliphatic polydiacid dihydric alcohol ester polyol added in the step (3) is 300-10000, and the injection flow rate of the on-line adding polyhydric alcohol is 3-40% of the flow rate of the ethylene terephthalate oligomer.
The invention adopts the process technology of online addition of the copolymerization modification component to prepare the aromatic polyester-aliphatic polyester block copolyester, thereby not only avoiding the influence of the copolymerization modification component on the preparation process of the ethylene terephthalate oligomer and reducing the generation of side reactions such as ether bond generation, but also shortening the retention time of the copolymerization modifier under the high-temperature reaction condition and reducing the generation of side reactions such as thermal degradation.
According to the above process, the ethylene terephthalate oligomer described in the step (3) is mixed with the aliphatic dibasic acid diol polyol added in-line by a dynamic mixer, preferably a high shear homogenizing pump, and/or a static mixer, preferably a tubular static mixer.
According to the method, the esterification reaction in the step (2) is carried out in one or two esterification kettles in sequence; when one esterification kettle is used, the temperature of the esterification reaction is 240-275 ℃, and the pressure is 100-400 kPa; when the number of the esterification kettles is two, the temperature of the esterification reaction in the first esterification kettle is 240-275 ℃, the pressure is 100-400 kPa, and the temperature of the esterification reaction in the second esterification kettle is 240-275 ℃, and the pressure is 100-200 kPa.
According to the method, the temperature of the pre-polycondensation reaction in the step (3) is 230-280 ℃, and the pressure is 0.5-6 kPa.
In the method, the sequence structure of the aromatic polyester-aliphatic polyester block copolyester can be effectively regulated and controlled by regulating and controlling the conditions of the polycondensation reaction.
According to the method, the temperature of the final polycondensation reaction in the step (4) is 235-285 ℃, and the pressure is 50-500 Pa.
The method for preparing the aromatic polyester-aliphatic polyester block copolyester can be implemented on the necessarily modified conventional polyester device by adopting a polymerization process flow similar to that of the conventional polyester, so that the method is easy for large-scale industrial production, low in production energy consumption, high in production efficiency and good in product quality stability.
Compared with the prior art, the invention has the following beneficial effects:
(1) when the fabric containing the aromatic polyester-aliphatic polyester multi-block copolyester fiber and the regenerated fiber is dyed, dye molecules can enter the fiber at a lower temperature, so that the normal-pressure dyeing of disperse dye is realized, the dip-dyeing temperature is below 100 ℃, and the hot-melt dyeing temperature is below 185 ℃;
(2) the fabric containing the aromatic polyester-aliphatic polyester multi-block copolyester fiber and the regenerated fiber is low-carbon and environment-friendly in the production process, and the fabric is soft in hand feeling and better in wearing comfort due to low fiber rigidity.
Detailed Description
The embodiments in the following examples can be further combined or replaced, and the examples are only for describing the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and those skilled in the art can make various changes and modifications to the technical solution of the present invention without departing from the design concept of the present invention, and all fall within the protection scope of the present invention.
Example 1: fabric product one
Combining the raw materials of the fabric: warp-aromatic polyester-aliphatic polyester block copolyester fiber 32S
Weft-viscose fibres 32S
The structural formula of the aromatic polyester-aliphatic polyester block copolyester is as follows:
wherein x is 38.88, y is 4.05, R1Is C3 alkylene, R2The polyester fiber is C4 alkylidene, the randomness of the aromatic polyester-aliphatic polyester block copolyester is 0.27, the intrinsic viscosity is 0.72dL/g, the melting point is 229 ℃, the glass transition temperature is 71 ℃, the hue b value is 3, the content of diethylene glycol is 0.9 percent, and the composition ratio of the aromatic polyester-aliphatic polyester block copolyester fiber to viscose fiber is 70: 30, the degree of polymerization of the ethylene terephthalate oligomer is 6.
The fabric of the embodiment is processed into grey cloth by adopting the weaving process in the prior art, the sizing agent is PVA/CMC mixed sizing agent, the sizing rate is 10-14%, the weave is designed to be plain weave or twill weave, the warp density of the obtained fabric is 58-64 pieces/cm, the weft density is 26-32 pieces/cm, and the net blank weight is 155-2The obtained fabric has the anti-pilling performance of 4-5 grades.
Disperse dye is adopted for dyeing, only aromatic polyester-aliphatic polyester block copolyester is dyed, viscose fiber is not dyed, the dip-dyeing temperature is 98 ℃, and the dye-uptake is 95%.
Example 2: fabric product two
Combining the raw materials of the fabric: warp-aromatic polyester-aliphatic polyester block copolyester fiber 28S
Weft-modal staple fiber 28S
The structural formula of the aromatic polyester-aliphatic polyester block copolyester is as follows:
wherein, x is 12.00, y is 1.44, R1Is C4 alkylene, R2Is C2 alkylidene, the randomness of the aromatic polyester-aliphatic polyester block copolyester is 0.78, the intrinsic viscosity is 0.75dL/g, the melting point is 226 ℃, the glass transition temperature is 70 ℃, the hue b value is 4, the content of diethylene glycol is 1.0 percent, and the composition ratio of the aromatic polyester-aliphatic polyester block copolyester fiber to viscose fiber is 60: 40, the degree of polymerization of the ethylene terephthalate oligomer is 2.
The fabric of the embodiment is woven on a circular machine by adopting a knitting process to generate grey cloth, the longitudinal density of the fabric is 62-68 meshes/5 cm, the transverse density of the fabric is 82-90 meshes/5 cm, the weave design adopts a single-side plain stitch weave, and the fabric is woven on an 18G single-side circular machine.
The dyeing adopts a one-bath one-step over-dyeing process, alkali-resistant disperse dye and neutral color-fixing reactive dye are used for one-bath one-step dyeing at the temperature of 98 ℃, the one-bath one-step dyeing of the invention is carried out by adopting the process of the prior art, wherein the disperse dye is used for dyeing aromatic polyester-aliphatic polyester block copolyester fiber, the reactive dye is used for dyeing modal short fiber, the two are not mutually influenced, and the dyeing rate is 96%.
Example 3: fabric product three
Combining the raw materials of the fabric: warp-aromatic polyester-aliphatic polyester block copolyester fiber 30S
Weft-tencel staple 30S
The structural formula of the aromatic polyester-aliphatic polyester block copolyester is as follows:
wherein x is 65.41, y is 1.21, R1Is C8 alkylene, R2Is C3 alkylene, the randomness of the aromatic polyester-aliphatic polyester block copolyester is 0.84, and the intrinsic viscosity is 0.62dL/gThe melting point is 250 ℃, the glass transition temperature is 77 ℃, the hue b value is 1, the content of diethylene glycol is 0.8%, and the composition ratio of the aromatic polyester-aliphatic polyester block copolyester fiber to the viscose fiber is 80: 20, the degree of polymerization of the ethylene terephthalate oligomer is 1.
The fabric of the embodiment is processed into grey cloth by adopting the weaving process in the prior art, the PVA/CMC mixed slurry is selected as the slurry, the sizing percentage is 10-14%, the weave is designed to be plain weave or twill weave, the warp density of the obtained fabric is 61-65 pieces/cm, the weft density is 32-38 pieces/cm, and the net blank weight is 165-188 g/m-2The obtained fabric has the anti-pilling performance of 4-5 grades.
Disperse dye is adopted for dyeing, only aromatic polyester-aliphatic polyester block copolyester is dyed, tencel short fiber is not dyed, the dip-dyeing temperature is 100 ℃, and the dye-uptake is 96%.
The dyeing adopts a one-bath one-step over-dyeing process, alkali-resistant disperse dye and neutral color-fixing reactive dye are used for one-bath one-step dyeing at the temperature of 98 ℃, the one-bath one-step dyeing of the invention is carried out by adopting the process of the prior art, wherein the disperse dye is used for dyeing aromatic polyester-aliphatic polyester block copolyester fiber, the reactive dye is used for dyeing tencel short fiber, the two are not mutually influenced, and the dyeing rate is 93%.
Test example 1 influence of randomness of aromatic polyester-aliphatic polyester block copolyester on exhaust temperature and exhaustion rate
The raw materials and dyeing method of the fabric are the same as those in example 1, except that the influence of the randomness of the aromatic polyester-aliphatic polyester block copolyester on the exhaust temperature and the dye uptake is changed, and the table 1 shows.
TABLE 1
| Degree of irregularity | Exhaust temperature (. degree. C.) | Dye uptake(％) |
| 0.27 | 98 | 95 |
| 0.84 | 96 | 94 |
| 1.07 | 113 | 89 |
| 1.35 | 119 | 86 |
As can be seen from the table above, the randomness of different aromatic polyester-aliphatic polyester block copolyesters has a large influence on the dip-dyeing temperature and the dye uptake, and the randomness of the aromatic polyester-aliphatic polyester block copolyesters has a good dyeing function.
Test example 2 Effect of polymerization degree of ethylene terephthalate oligomer on exhaust temperature and exhaustion Rate
The raw materials and dyeing method of the fabric are the same as those of example 1, except that only the polymerization degree of the ethylene terephthalate oligomer is changed, and the influence of different polymerization degrees on the fabric dyeing is examined, and the results are shown in table 2.
TABLE 2
As can be seen from the table, in the polymerization degree range of 1-8 of the ethylene terephthalate oligomer, the dip-dyeing temperature is lower, the dye uptake is higher, and if the polymerization degree of the ethylene terephthalate oligomer is changed to achieve the same dye uptake, the dye uptake can be achieved only by the higher dip-dyeing temperature, so that the invention is proved to adopt the proper polymerization degree, and the dyeing requirement can be met by the lower dip-dyeing temperature, thereby being low-carbon, environment-friendly and energy-saving.
The inventors have also conducted the above experiments on other examples, which are not listed due to space limitations.
Claims (11)
1. A fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber is characterized in that the fabric is formed by blending or interweaving the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated fiber, the aromatic polyester-aliphatic polyester block copolyester is formed by polycondensation of ethylene terephthalate oligomer and aliphatic polyester straight-chain dibasic acid side group dihydric alcohol ester polyol, and the fabric has the following structural units:
wherein x is more than 4 and less than 100, y is more than 1 and less than 25, and the ratio of x to y is 4-54: 1; r1 is C2-C8 alkylidene, R2 is C3-C8 alkylidene, and the randomness of the aromatic polyester-aliphatic polyester block copolyester is more than or equal to 0.05 and less than or equal to 0.95; the polymerization degree of the ethylene terephthalate oligomer is 1-8;
the intrinsic viscosity of the aromatic polyester-aliphatic polyester block copolyester is 0.5-1.2 dL/g;
the melting point of the aromatic polyester-aliphatic polyester block copolyester is 160-250 ℃;
the glass transition temperature of the aromatic polyester-aliphatic polyester block copolyester is 40-77 ℃;
the hue b value of the aromatic polyester-aliphatic polyester block copolyester is 1-8;
the preparation method of the aromatic polyester-aliphatic polyester block copolyester comprises the following steps:
(1) adding a proper amount of catalyst into a mixture of terephthalic acid and ethylene glycol with a molar ratio of 1: 1.05-2 to prepare slurry;
(2) performing esterification reaction on the slurry prepared in the step (1) to obtain an ethylene terephthalate oligomer;
the esterification reaction is carried out in one or two esterification kettles in sequence; when one esterification kettle is used, the temperature of the esterification reaction is 240-275 ℃, and the pressure is 100-400 kPa; when two esterification kettles are used, the temperature of the esterification reaction in the first esterification kettle is 240-275 ℃, the pressure is 100-400 kPa, the temperature of the esterification reaction in the second esterification kettle is 240-275 ℃, and the pressure is 100-200 kPa;
(3) adjusting the temperature of the ethylene terephthalate oligomer prepared in the step (2) to 200-250 ℃, uniformly mixing the ethylene terephthalate oligomer with the aliphatic dibasic acid dihydric alcohol ester polyol added on line, and then carrying out a pre-polycondensation reaction to obtain a copolyester prepolymer;
the temperature of the pre-polycondensation reaction is 230-280 ℃, and the pressure is 0.5-6 kPa;
(4) carrying out final polycondensation reaction on the copolyester prepolymer prepared in the step (3) to obtain a copolyester melt;
the temperature of the final polycondensation reaction is 235-285 ℃, and the pressure is 50-500 Pa;
(5) and (4) filtering the copolyester melt obtained in the step (4), cooling and solidifying to obtain copolyester slices.
2. The fabric of aromatic polyester-aliphatic polyester block copolyester fibers and regenerated cellulose fibers according to claim 1, wherein the melting point of the aromatic polyester-aliphatic polyester block copolyester is 210 ℃ to 250 ℃.
3. The fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber according to claim 1 or 2, wherein the content of the aromatic polyester-aliphatic polyester block copolyester fiber in the fabric is 10-90%.
4. The fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber according to claim 1 or 2, wherein the content of the aromatic polyester-aliphatic polyester block copolyester fiber in the fabric is 60 to 80 percent.
5. The fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber according to claim 1 or 2, wherein the aliphatic linear dibasic acid in the aliphatic polyester linear dibasic acid pendant diol ester polyol is selected from succinic acid, adipic acid or sebacic acid, and the aliphatic pendant diol is selected from methyl propylene glycol, neopentyl glycol, 2-methyl-2, 4-pentanediol, 3-methyl-1, 5-pentanediol or trimethyl pentanediol.
6. The fabric containing aromatic polyester-aliphatic polyester block copolyester fiber and regenerated cellulose fiber as claimed in claim 1 or 2, wherein the aliphatic polyester linear dibasic acid pendant diol ester polyol has a number average molecular weight of 300-1000.
7. The fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber according to claim 1 or 2, wherein the regenerated cellulose fiber comprises various fibers using regenerated cellulose as a raw material.
8. The fabric containing the aromatic polyester-aliphatic polyester block copolyester fiber and the regenerated cellulose fiber according to claim 7, wherein the regenerated cellulose fiber is viscose, modal or tencel.
9. A method for preparing a fabric containing aromatic polyester-aliphatic polyester block copolyester fibers and regenerated cellulose fibers according to claim 1, which comprises dyeing and finishing, wherein the dyeing is carried out by using disperse dyes.
10. The method for preparing a fabric comprising aromatic polyester-aliphatic polyester block copolyester fibers and regenerated cellulose fibers according to claim 9, wherein the fabric is dyed by a one-bath one-step method using a disperse dye.
11. The method of claim 9 or 10, wherein the exhaust temperature is 80 ℃ to 100 ℃, the hot-melt dyeing temperature is 160 ℃ to 185 ℃, and the dye uptake is > 85%.
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