WO2019116792A1 - 織物及びその製造方法 - Google Patents
織物及びその製造方法 Download PDFInfo
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- WO2019116792A1 WO2019116792A1 PCT/JP2018/041497 JP2018041497W WO2019116792A1 WO 2019116792 A1 WO2019116792 A1 WO 2019116792A1 JP 2018041497 W JP2018041497 W JP 2018041497W WO 2019116792 A1 WO2019116792 A1 WO 2019116792A1
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- yarn
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- woven fabric
- weft
- fabric
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D17/00—Woven fabrics having elastic or stretch properties due to manner of weaving
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/60—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the warp or weft elements other than yarns or threads
- D03D15/68—Scaffolding threads, i.e. threads removed after weaving
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D3/00—Woven fabrics characterised by their shape
- D03D3/02—Tubular fabrics
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D3/00—Woven fabrics characterised by their shape
- D03D3/08—Arched, corrugated, or like fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06J—PLEATING, KILTING OR GOFFERING TEXTILE FABRICS OR WEARING APPAREL
- D06J1/00—Pleating, kilting or goffering textile fabrics or wearing apparel
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2240/001—Designing or manufacturing processes
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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
- D10B2509/00—Medical; Hygiene
- D10B2509/06—Vascular grafts; stents
Definitions
- the present invention relates to a fabric and a method of manufacturing the same.
- Patent Document 1 in a woven fabric which is formed by alternately interlacing the processes, a heat-shrinkable yarn is disposed for each predetermined number of wefts, and a heat is applied to produce a folded shape. It is disclosed. Specifically, by arranging the heat-shrinkable yarn to be exposed only on one side of the fabric without being woven into the warp at the site where the folded shape is to be produced, it is possible to obtain the desired by merely applying heat treatment without pressing. Techniques for creating three-dimensional shapes are disclosed. And, if a heat-shrinkable yarn having water solubility is used, a technique is also disclosed that, by performing a washing treatment after the molding process, an aesthetic disadvantage can be removed while realizing a desired three-dimensional shape. ing.
- Patent Document 2 a single-layered woven fabric portion and a bag-shaped portion formed of a plurality of layers formed using fiber yarns constituting the single-layered woven tissue portion exist alternately and intermittently.
- a change fabric characterized in that one surface of the bag-like portion bulges in a slack state with respect to the other surface. It is a technology that high heat retention can be achieved by a novel fiber structure in which air is contained in a bag-like portion.
- one surface of the bag-like portion swells in a state of being slackened with respect to the other surface, and the slack surface of the bag-like portion is fixed to the other surface. Therefore, if the front and back are not used properly, the slack of the bag-like part is bent without being effectively used, and if it is used at a location where there is motion such as a joint, it can not follow the motion and wrinkles occur. It will be done. Further, since the bag-like portion is fixed to the other surface, it is necessary to sew while holding slack of the bag-like portion at the time of sewing, but it is difficult to sew without bending the bag-like portion.
- the present invention ameliorates the problems of the prior art and provides a woven fabric which can stably form a folded shape excellent in form retention and followability and maintain the folded structure.
- the purpose is Moreover, the 2nd subject of this invention aims at providing the manufacturing method which can manufacture said textiles suitably.
- the present invention has any of the following configurations.
- a method for producing a woven fabric comprising the following steps (a) to (d): (A) using a removal yarn for a part of a warp or weft, and weaving while folding a yarn disposed in parallel to the removal yarn (b) heat treatment step (c) setting the crimp of the folded yarn (c) a heat treatment step of setting crimps of the folded yarn after the step (d) of removing the removed yarn after the step b)
- the woven fabric is tubular, the hose for transfer of fluid or powder, and the hose for protecting linear products such as wires, cables and electric conduits, and industrial applications such as tubular filters, and artificial blood vessels, It can be usefully used for medical applications, such as a base material of a shunt, a stent graft, etc., It can use suitably especially as an artificial blood vessel.
- said textiles can be manufactured suitably.
- the fabric according to the present invention is characterized in that it has pleats and the pleat height is 2 to 10 times the average diameter of the yarns arranged in the same direction as the pleats. Preferably, it is in the range of 2 to 5 times.
- the pleat height is 2 times or more, it is possible to form a pleated shape regularly and stably, with excellent followability and shape retention. If it is more than 10 times, the shape retention of the pleated shape is poor, and it is difficult to stably obtain the pleated shape, and the sewability also deteriorates.
- pleat means that peaks and valleys are alternately and continuously formed repeatedly on both the front and back of the fabric, and the peaks on the surface of the fabric are valleys on the back of the fabric. It means that there is.
- pleat height refers to the height from the valley bottom to the top of the “pleat” on the front or back of the fabric.
- average diameter of yarn refers to a value calculated from the distance between the top and bottom of the fabric in the vertical direction (thickness direction) by observing the yarn bundle in a cross section in the vertical direction (thickness direction) of the fabric.
- thermoplastic fiber 60 mass% or more is a thermoplastic fiber
- yarn (warp and weft) which comprises the textile of this invention it is more preferable that 80 mass% or more is a thermoplastic fiber. Setting the content of yarns used in the fabric to the above range is preferable in terms of dimensional stability of the fabric and shape retention of the pleated shape, and the pleated shape tends to be more stably and regularly formed. Because it is preferable.
- thermoplastic fibers examples include nylon fibers and polyester fibers, and so-called non-elastic fibers are more preferable. Inelastic fibers tend to increase the strength and dimensional stability of the fabric.
- the “non-elastic fiber” is a fiber having no so-called rubber elasticity, and is excellent in extensibility and recovery like thermoplastic elastomers represented by polyether elastomers, polysulfide elastomers and polyurethane elastomers. It is a fiber different from a fiber having rubber elasticity, that is, an elastic fiber, which is composed of a raw material. In the present invention, the woven fabric itself is stretchable even if inelastic yarns are used.
- polyester fibers are preferred as the thermoplastic fiber in terms of strength and dimensional stability.
- polyester fiber the fiber which consists of a polyethylene terephthalate, a polybutylene terephthalate, a polypropylene terephthalate, those copolymers, etc. can be mentioned, for example.
- the yarn (warp and weft) constituting the woven fabric of the present invention is preferably a multifilament consisting in part or all of a filament having a single yarn diameter of 6 ⁇ m or less.
- the single yarn diameter in the above range, flexibility is improved, and a more dense structure is preferable because a pleated shape having excellent followability can be more stably and regularly formed.
- the yarn (warp and weft) constituting the woven fabric of the present invention is not particularly limited, but twisted yarn, false twisted yarn, aligned yarn, etc. can be used as appropriate.
- the weave density of the yarn in the pleat direction is influenced by the diameter of the yarn used, but it is 50 to 600 yarns / inch (2.54 cm) in the final stage (that is, after various steps have been applied). Is more preferably 80 to 500 lines / inch (2.54 cm), more preferably 100 to 450 lines / inch (2.54 cm).
- the weave density of the yarn in the direction intersecting the pleat direction is not particularly limited, and can be appropriately set depending on the use of the fabric.
- the manufacturing method of the textile fabric concerning this invention is not specifically limited, For example, it is carried out as follows. First, a removal yarn such as a dissolving yarn is used as a part of a warp or weft constituting a woven fabric, and weaving is performed while folding a yarn disposed parallel to the removal yarn. Then, after weaving, heat treatment (first time) is performed to set the crimp of the folded yarn, then the removal yarn is removed, and heat treatment is performed to maximize crimp of the folded yarn (second time) Can be obtained by At this time, it is preferable that the heat treatment temperature after removing the removal yarn be equal to or less than the heat treatment temperature before removing the removal yarn. By doing this, it is possible to optionally obtain a pleated shape excellent in form retention and followability without losing the stretchability of the woven fabric.
- a warp beam and a weft are installed in the loom and woven.
- a loom to be adopted a water jet room, a rapier room, an air jet room or the like can be suitably used according to the application.
- the weave structure is not particularly limited, and can be set as appropriate.
- At least two types of yarns that constitute the woven fabric and removed yarns that are removed in a later step and are not present in the final woven fabric are used as yarns (warp or weft) in the direction crossing the pleating direction.
- warp yarns or weft yarns removal yarns are disposed at appropriate intervals between yarns constituting the fabric.
- yarns constituting the woven fabric as described above, thermoplastic fibers and further non-elastic fibers are preferable, but as for the removal yarns, thermoplastic fibers and further non-elastic fibers are preferable.
- the yarns that finally constitute the fabric with the yarns are “warp yarns (wefts) A” and finally removed yarns that are not present in the fabric Will be described as “warp (weft) B”.
- warp (weft) B the yarn in the pleat direction
- polyester fibers of non-elastic yarn are preferable in terms of strength and dimensional stability.
- polyester fibers of non-elastic yarn include fibers made of polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, copolymers thereof and the like.
- the warp (weft) A is preferably a multifilament consisting in part or in whole of a filament having a single yarn diameter of 6 ⁇ m or less.
- a filament is not particularly limited, but may be obtained by direct spinning or may be obtained by desealing a sea-island composite fiber.
- the dissolving yarn is a fiber that is soluble in solvents such as water and alkaline solution.
- Specific examples of the dissolving yarn include, for example, water-soluble fibers such as polyvinyl alcohol fibers, polyester fibers obtained by copolymerizing a third component such as isophthalic acid, 5-sodium sulfoisophthalic acid and methoxypolyoxyethylene glycol, Although easily soluble alkali fibers such as polylactic acid fibers can be used, it is not particularly limited.
- a temporary thread to be removed after weaving can also be used as the warp (weft) B. It is preferable that the yarn used also in the temporary yarn is a thermoplastic fiber, and further a non-elastic fiber yarn as described above.
- the total fineness of the warps (wefts) A and B is preferably 0.05 dtex to 560 dtex, more preferably 0.05 dtex to 235 dtex, and still more preferably 0.05 dtex to 100 dtex.
- the warp (weft) in the pleating direction has a structure of two or more layers, it is preferable to arrange the warp (weft) B in the middle of the structure.
- the warp (weft) B has a tension higher than that of the warp (weft) A, and the warp (weft) A has a tension lower than that of the warp (weft) B within a range that does not affect weaving. It is preferable to do.
- wefts (warps) in the pleat direction are restrained by the warps (wefts) A with the warps (wefts) B as a fulcrum, and the warps (wefts) A In the slack state, the warp (weft) A in a slack state is folded to express a crimp.
- the warp (warp) is pressed during wefting, refining process (described later), etc.
- a warp (weft) A for restraining a weft (warp) arranged on the upper side (lower side) is easily pushed in on the upper side (lower side), and arranged on the lower side (upper side)
- the warp (weft) A restraining the weft (warp) is easily pushed down (upper).
- the warp (weft) A is alternately folded up and down to express a crimp.
- the crimp is heat-set by a subsequent heat treatment (described later), and the warp B is removed, whereby the fine pleat shape as described above can be imparted to the fabric.
- wefts when inserting wefts (warps), they may be alternately arranged at the upper and lower positions of the warp (weft) B one by one, or even if they are alternately arranged at the upper and lower positions of the warp (weft) B Good. Furthermore, in the case of alternately arranging a plurality of yarns, a plurality of weft yarns (warps) may be inserted at one time or may be divided and continuously inserted.
- the tension of the warp (weft) B is 0.5 to 1.5 cN / dtex
- the tension of the warp (weft) A is 0.05 to 0.15 cN / dtex
- the pleat shape is stable and regular. It is preferable in forming it.
- the arrangement of the warp (weft) A and the warp (weft) B can be appropriately adjusted according to the application, but it is preferable to arrange the warp B at a ratio of 1 to 2 to 10 warps.
- yarns in the pleat direction are yarns in the direction crossing the pleat direction and, similarly to the yarn described for the warp (weft) A which will eventually constitute the fabric, for example, nylon fibers, polyester Although it can be composed of various synthetic fibers such as fibers, inelastic yarns are preferred. Among them, polyester fibers of non-elastic yarn are preferable in terms of strength and dimensional stability. Examples of polyester fibers of non-elastic yarn include fibers made of polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and the like.
- the yarn used in the pleat direction is preferably a multifilament in which a part or all of the yarn is composed of filaments having a single yarn diameter of 6 ⁇ m or less, and is not particularly limited. It may be obtained by processing. By setting the single yarn diameter in the above range, the softness of the fabric is improved and a more dense structure can be obtained, which is preferable.
- the total fineness of the yarn used in the pleating direction is preferably 560 dtex or less, more preferably 235 dtex or less, and more preferably 100 dtex or less.
- the yarn in the pleat direction in two or more layers to constitute a woven fabric.
- the textile of the present invention can be made into a cylindrical form and can be used as a base material such as artificial blood vessels
- the inner diameter in the case of forming a cylindrical textile is preferably 100 mm or less, more preferably 50 mm or less Preferably it is 10 mm or less. As a preferable lower limit, it is about 1.5 mm from the point of weaveability.
- the post-processing step preferably includes the following steps.
- the raw oil fluid and the glue material are dropped by scouring such as hot water washing, and when thermoplastic fibers are used as the warp (weft) B, the fibers are shrunk.
- the treatment conditions are preferably a temperature of 80 to 98 ° C. and a time of 15 to 40 minutes.
- the scouring agent is not particularly limited, a commercially available scouring agent can be appropriately used.
- the crimp shape of the warp (weft) A is stabilized by preheat setting (first heat treatment).
- the warp (weft) B is a thermoplastic fiber and is shrunk in the previous step, since the crimp of the warp (weft) A becomes large along with the shrinkage.
- the processing conditions for preheat setting are preferably a temperature of 160 to 190 ° C. and a time of 3 to 10 minutes.
- the fabric is subjected to desealing treatment as required, and the warp (weft) B is removed.
- the warp (weft) B is a dissolving yarn
- Nicolling treatment and dissolving and removing are performed in the following steps.
- the warp (weft) B is not a dissolving yarn but a false yarn
- the false yarn is drawn from the fabric and physically removed.
- Acid treatment embrittles the sea component of the sea-island composite fiber.
- the acid is not particularly limited, and maleic acid can be mentioned.
- the treatment conditions are preferably a concentration of 0.1 to 1% by mass, a temperature of 100 to 150 ° C., and a time of 10 to 50 minutes. When sea-island composite fibers are not used, acid treatment can be omitted.
- alkali treatment By alkali treatment, the sea component of the sea-island composite fiber embrittled by the dissolving yarn and acid treatment is eluted.
- the alkali is not particularly limited, and sodium hydroxide can be mentioned.
- the treatment conditions are preferably a concentration of 0.5 to 2% by mass, a temperature of 70 to 98 ° C., and a time of 60 to 100 minutes.
- heat setting maximizes the crimp of the warp (weft) A loosened by the sea removal treatment again.
- the heat treatment is performed in a state where the fabric is maximally compressed in the direction intersecting the pleating direction so as to prevent the wrinkles from entering.
- the treatment conditions are preferably a temperature of 160 to 190 ° C. and a time of 3 to 10 minutes.
- heat setting (third time) can be performed again for the purpose of forming a woven fabric having a shrinkage margin while leaving the bending point of the crimp, but the third time may not be performed if necessary, It can also be implemented once.
- the processing conditions are set to a temperature 10 to 20 ° C. lower than the first heat setting, and a time of 3 to 10 minutes is preferable.
- the tubular fabric can be used as a fluid, a hose for transferring powder, a wire, a cable, a hose for protecting a linear material such as a cable tube, an industrial use such as a tubular filter, a base material for artificial blood vessels, a stent graft, etc. It can be usefully used for medical use, and in particular can be suitably used as an artificial blood vessel. Moreover, according to the manufacturing method of this invention, said textiles can be manufactured suitably.
- FIG. 1 one embodiment of the woven fabric obtained by making it above in FIG. 1 is shown typically.
- Pleated ridges 6-A i and 6-A ii are drawn widely apart from one another, and the ridges formed between the pleated peaks are also drawn large.
- Fineness and number of filaments The fineness was measured based on JIS L 1013: 2010 8.3.1 Positive fineness (Method A). The number of filaments was measured based on JIS L 1013: 2010 8.4.
- the pleated height is a photograph taken by cutting the woven fabric after post-processing in a direction perpendicular to the pleating direction and enlarging the cut surface with a Keyence microscope VHX-2000 at 400 times Based on the top of the photograph and the valley bottom of the pleat of one warp (weft) (ie, the warp (weft) A i shown in FIG. 1) which is in the direction crossing the pleat direction on the foremost side of the photograph. Were vertically connected with a line to measure its length and calculated in ⁇ m. At that time, the sample was changed, measurement was performed 5 times, and the average value was evaluated.
- Pleated shape is crushed, but peaks and valleys can be confirmed.
- Example 1 In the weaving process, the following yarns A, B and C are disposed so that the warps cross the pleat direction, and the post-processing weave density is: warp A: 200 yarns / inch (2.54 cm), weft C A double weave fabric with 306 yarns / inch (2.54 cm) was woven.
- -Warp A (sea-island composite fiber): polyethylene terephthalate fiber, 66 dtex, 9 filaments (after desealing treatment: 53 dtex, 630 filaments)
- the arrangement of the warp A and the warp B was repeated so that the ratio of one warp B to three warps A was repeated.
- the warp yarn B was disposed so as to pass between two weft yarns C having a two-layer structure.
- the obtained weft double woven fabric was washed in hot water at a temperature of 98 ° C. for 20 minutes, and then pre-heat set was performed at a temperature of 180 ° C. for 5 minutes.
- the warp A and weft C of the obtained double-folded fabric were subjected to desealing treatment, and the warp B was dissolved and removed.
- Acid treatment uses maleic acid, treatment conditions: concentration 0.2 mass%, temperature 130 ° C., time 30 minutes, alkali treatment uses sodium hydroxide, treatment conditions: concentration 1 mass%, temperature 80 ° C. , 90 minutes.
- heat setting was performed at a temperature of 180 ° C. for 5 minutes.
- the properties of the resulting fabric are shown in Table 1.
- the proportion of thermoplastic fibers was 100% by mass, and the average diameter of the yarns arranged in the same direction as the pleats was 70 ⁇ m.
- the pleat height was 270 ⁇ m. Both the bending resistance and the sewability of the obtained woven fabric were ⁇ .
- Example 2 A weft double woven fabric having a weave density of 96 yarns / inch (2.54 cm) after post-processing is woven so that the pleat height after post-processing is 650 ⁇ m, and warp B A woven fabric was obtained in the same manner as in Example 1 except that a polyethylene terephthalate fiber, 56 dtex, 18-filament black base yarn was used for removing the warp B after desealing treatment.
- the properties of the resulting fabric are shown in Table 1.
- the proportion of thermoplastic fibers was 100% by mass, and the average diameter of the yarns arranged in the same direction as the pleats was 70 ⁇ m.
- the bending resistance of the obtained fabric was ⁇ , and the sewability was ⁇ .
- Example 3 The following yarns are used for the warp A and weft C, and the warp A2 is arranged so that the ratio of the warp A2 is 3 to 2 with respect to the warp A1, and the post-processing pleated height is 150 ⁇ m.
- a fabric was obtained in the same manner as in Example 1 except that the heat setting (third time) was performed under the conditions of a temperature of 160 ° C. and a time of 5 minutes.
- Warp A1 polyethylene terephthalate fiber, 48 dtex, 144 filaments
- Warp A2 cotton yarn, 80 count (about 74 dtex)
- Weft C polyethylene terephthalate fiber, 48 dtex, 144 filaments Properties of the obtained woven fabric are shown in Table 1.
- the ratio of thermoplastic fibers was 68% by mass, and the average diameter of the yarns arranged in the same direction as the pleats was 67 ⁇ m.
- the bend resistance of the obtained fabric was ⁇ , and the sewability was ⁇ .
- Example 4 A fabric was obtained in the same manner as in Example 3, except that the ratio of warp A2 was 2 to 3 with respect to warp A1.
- the properties of the resulting fabric are shown in Table 1.
- the proportion of thermoplastic fibers of yarn intersecting the pleat direction was 52% by mass, and the average diameter of yarns arranged in the same direction as the pleat was 67 ⁇ m.
- the wrinkles produced due to the deterioration of the followability were deeper than those of Example 3 but were in the category of ⁇ , and were of a level that would not cause any practical problems.
- the sewability was ⁇ .
- Comparative Example 1 A fabric was obtained in the same manner as Example 1, except that the third heat setting was performed under the conditions of a temperature of 160 ° C. and a time of 5 minutes so that the pleat height after post-processing was 110 ⁇ m.
- the properties of the resulting fabric are shown in Table 1.
- the proportion of thermoplastic fibers was 100% by mass, and the average diameter of the yarns arranged in the same direction as the pleats was 70 ⁇ m.
- the bending resistance of the obtained fabric was x, and the sewability was ⁇ .
- Comparative Example 2 Example 1 except that a weft double woven fabric having a weave density of 45 yarns / inch (2.54 cm) after post-processing is woven so that the pleat height after post-processing is 800 ⁇ m
- the fabric was obtained in the same manner as above.
- the properties of the resulting fabric are shown in Table 1.
- the proportion of thermoplastic fibers was 100% by mass, and the average diameter of the yarns arranged in the same direction as the pleats was 70 ⁇ m.
- the bending resistance of the obtained fabric was ⁇ , and the sewing property was x.
- the pleated fabric according to the present invention can be suitably used for general clothing, medical materials such as artificial blood vessels, and other industrial materials, but the scope of application thereof is not limited to these.
- Warp (weft) A i in the direction intersecting the pleat direction 2.
- Warp (weft) in the direction intersecting the pleat direction A ii 3.
- Weft in the pleat direction (warp) 4.
- Weft in the pleat direction (warp) 5 .. Pleated height 6 .. Pleated ridges 6-A i , 6-A ii ..
- Two adjacent warp (weft) A i valley of pleats of A ii
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Abstract
Description
(1) プリーツを有し、該プリーツ高さが該プリーツと同方向に配した糸の平均直径の2倍~10倍である織物。
(2) 前記織物を構成する糸の60質量%以上が熱可塑性繊維である、前記(1)に記載の織物。
(3) 前記熱可塑性繊維が非弾性繊維である、前記(2)に記載の織物。
(4) 前記非弾性繊維がポリエステル繊維である、前記(3)に記載の織物。
(5) 前記織物を構成する糸は、その一部もしくは全てが単糸直径6μm以下のフィラメントからなるマルチフィラメントである、前記(1)~(4)のいずれかに記載の織物。
(6) 医療用途に用いられる、前記(1)~(5)のいずれかに記載の織物。
(7) 筒状の形態にある、前記(1)~(6)のいずれかに記載の織物。
(8) 前記(7)に記載の筒状の織物を基材とする人工血管。
(9) 以下の(a)~(d)の工程を有する織物の製造方法。
(a)経糸または緯糸の一部に除去糸を用い、該除去糸に平行に配置する糸を折り畳みながら製織する工程
(b)前記折り畳まれた糸のクリンプをセットする熱処理工程
(c)前記(b)の工程の後に除去糸を除去する工程
(d)前記(c)の工程の後に、前記折り畳まれた糸のクリンプをセットする熱処理工程
経糸、緯糸に用いる糸を準備し、経糸は整経、糊付などの準備工程を適宜行い、経糸ビームを作成する。
後加工工程は、例えば、下記の工程を経ることが好ましい。
酸処理により、海島複合繊維の海成分を脆化させる。酸としては、特に限定されないが、マレイン酸を挙げることができる。処理条件は、濃度0.1~1質量%、温度100~150℃、時間10~50分が好ましい。海島複合繊維を使用しない場合は、酸処理は省くことができる。
アルカリ処理により、溶解糸および酸処理により脆化した海島複合繊維の海成分を溶出させる。アルカリとしては、特に限定されないが、水酸化ナトリウムを挙げることができる。処理条件は、濃度0.5~2質量%、温度70~98℃、時間60~100分が好ましい。
繊度は、JIS L 1013:2010 8.3.1 正量繊度(A法)に基づき測定した。フィラメント数は、JIS L 1013:2010 8.4に基づき測定した。
プリーツ方向と交差する方向に織物を切断し、プリーツ方向に配された糸束の断面をキーエンス製マイクロスコープVHX-2000にて400倍に拡大して撮影した写真をもとに、織物の垂直方向(厚み方向)の上下における前記糸束それぞれの頂点間距離をμm単位で測定し、その平均値を算出した。その際、試料を変えて5回測定を行い、その平均値で評価した。
使用するマルチフィラメントの単糸断面をキーエンス製マイクロスコープVHX-2000にて400倍に拡大して撮影した写真をもとに測定し、μm単位で算出した。その際、偏平糸などの異形断面糸は最小値となる部分で測定した。試料を変えて5回測定を行い、その平均値で評価した。
プリーツ高さは、後加工後の織物についてプリーツ方向と垂直な方向に切断し、その切断面をキーエンス製マイクロスコープVHX-2000にて400倍に拡大して撮影した写真をもとに、写真の最前面にあるプリーツ方向と交差する方向にある経糸(緯糸)1本(すなわち、図1に符号1で示される経糸(緯糸)Ai)のプリーツの山頂部と谷底部を垂直方向に線で結びその長さを測定してμm単位で算出した。その際、試料を変えて5回測定を行い、その平均値で評価した。
JIS L 1096:2010 8.6.1(A法)に基づき測定した。
ミシン縫製によりプリーツ形状が保持されているかどうかを評価した。評価は縫製後のプリーツ形状を目視で観察し、◎、〇、×の3段階で評価した。
試料を10cm×10cmにカットして、平らな台上に置き、プリーツ方向と交差する方向に半分に折り曲げ、全面に100gの荷重を10秒間かけ、折り目の状態を目視で観察し、◎、〇、×で評価した。
製織工程として、経糸がプリーツ方向と交差する糸となるように下記の糸A、B、Cを配置し、後加工後の織密度が経糸A:200本/inch(2.54cm)、緯糸C:306本/inch(2.54cm)となるような緯2重織物を製織した。
・経糸A(海島複合繊維):ポリエチレンテレフタレート繊維、66dtex、9フィラメント(脱海処理後:53dtex、630フィラメント)
・経糸B(溶解糸):5-ナトリウムスルホイソフタル酸を共重合した易アルカリ溶解性のポリエステル繊維、84dtex、24フィラメント
・緯糸C(海島複合繊維):ポリエチレンテレフタレート繊維、66dtex、9フィラメント(脱海処理後:53dtex、630フィラメント)
なお、経糸Aと経糸Bの配置は、経糸A3本に対して経糸B1本の比率で繰り返されるように配置した。また、経糸Bは、2層構造を取る2本の緯糸Cの間に通るように配置した。
[実施例2]
後加工後のプリーツ高さが650μmになるように、後加工後の緯糸Cの織密度が96本/inch(2.54cm)となるような緯2重織物を製織したこと、そして、経糸Bにポリエチレンテレフタレート繊維、56dtex、18フィラメントの黒色原着糸を使用し、脱海処理後に経糸Bを抜糸したこと以外は実施例1と同様にして織物を得た。得られた織物の特性を表1に示す。得られた織物の構成糸において熱可塑性繊維の比率は100質量%、プリーツと同方向に配した糸の平均直径は70μmであった。得られた織物の耐屈曲性は◎、可縫性は〇であった。
経糸A、緯糸Cに下記の糸を用い、経糸A1に対して経糸A2が3対2の割合になるように配置し、後加工後のプリーツ高さが150μmになるように、後加工後の熱セット(3回目)を温度160℃、時間5分の条件で実施したこと以外は実施例1と同様にして織物を得た。
経糸A1:ポリエチレンテレフタレート繊維、48dtex、144フィラメント
経糸A2:綿糸、80番手(約74dtex)
緯糸C:ポリエチレンテレフタレート繊維、48dtex、144フィラメント
得られた織物の特性を表1に示す。得られた織物の構成糸において熱可塑性繊維の比率は68質量%、プリーツと同方向に配した糸の平均直径は67μmであった。得られた織物の耐屈曲性は〇、可縫性は◎であった。
経糸A1に対して経糸A2が2対3の割合になるように配置した以外は実施例3と同様にして織物を得た。得られた織物の特性を表1に示す。得られた織物の構成糸においてプリーツ方向と交差する糸の熱可塑性繊維の比率は52質量%、プリーツと同方向に配した糸の平均直径は67μmであった。得られた織物の耐屈曲性については、追従性の悪化によって生じたシワが実施例3よりも深いものの〇の範疇であり、実用上問題ない程度であった。可縫性は◎であった。
後加工後のプリーツ高さが110μmになるように、3回目の熱セットを温度160℃、時間5分の条件で実施したこと以外は実施例1と同様にして織物を得た。得られた織物の特性を表1に示す。得られた織物の構成糸において熱可塑性繊維の比率は100質量%、プリーツと同方向に配した糸の平均直径は70μmであった。得られた織物の耐屈曲性は×、可縫性は◎であった。
[比較例2]
後加工後のプリーツ高さが800μmになるように、後加工後の緯糸Cの織密度が45本/inch(2.54cm)となるような緯2重織物を製織したこと以外は実施例1と同様にして織物を得た。得られた織物の特性を表1に示す。得られた織物の構成糸において熱可塑性繊維の比率は100質量%、プリーツと同方向に配した糸の平均直径は70μmであった。得られた織物の耐屈曲性は◎、可縫性は×であった。
2‥プリーツ方向と交差する方向の経糸(緯糸)Aii
3‥プリーツ方向の緯糸(経糸)
4‥プリーツ方向の緯糸(経糸)
5‥プリーツ高さ
6‥プリーツの山部
6-Ai、6-Aii‥隣り合う2本の経糸(緯糸)Ai、Aiiのプリーツの山部
7‥プリーツの谷部
7-Ai、7-Ai‥隣り合う2本の経糸(緯糸)Ai、Aiiのプリーツの谷部
Claims (9)
- プリーツを有し、該プリーツ高さが該プリーツと同方向に配した糸の平均直径の2倍~10倍である織物。
- 前記織物を構成する糸の60質量%以上が熱可塑性繊維である請求項1に記載の織物。
- 前記熱可塑性繊維が非弾性繊維である請求項2に記載の織物。
- 前記非弾性繊維がポリエステル繊維である請求項3に記載の織物。
- 前記織物を構成する糸は、その一部もしくは全てが単糸直径6μm以下のフィラメントからなるマルチフィラメントである請求項1~4のいずれかに記載の織物。
- 医療用途に用いられる、請求項1~5のいずれかに記載の織物。
- 筒状の形態にある、請求項1~6のいずれかに記載の織物。
- 請求項7に記載の筒状の織物を基材とする人工血管。
- 以下の(a)~(d)の工程を有する織物の製造方法。
(a)経糸または緯糸の一部に除去糸を用い、該除去糸に平行に配置する糸を折り畳みながら製織する工程
(b)前記折り畳まれた糸のクリンプをセットする熱処理工程
(c)前記(b)の工程の後に除去糸を除去する工程
(d)前記(c)の工程の後に、前記折り畳まれた糸のクリンプをセットする熱処理工程
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