WO2021117894A1 - Woven fabric to be used in medical device for chest disease, and medical device for chest disease - Google Patents

Woven fabric to be used in medical device for chest disease, and medical device for chest disease Download PDF

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Publication number
WO2021117894A1
WO2021117894A1 PCT/JP2020/046394 JP2020046394W WO2021117894A1 WO 2021117894 A1 WO2021117894 A1 WO 2021117894A1 JP 2020046394 W JP2020046394 W JP 2020046394W WO 2021117894 A1 WO2021117894 A1 WO 2021117894A1
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Prior art keywords
dtex
woven fabric
less
weft
warp
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PCT/JP2020/046394
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French (fr)
Japanese (ja)
Inventor
高橋 哲子
遼 福田
登起男 奥野
理絵 千葉
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旭化成株式会社
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Priority to JP2021564071A priority Critical patent/JPWO2021117894A1/ja
Publication of WO2021117894A1 publication Critical patent/WO2021117894A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/04Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06Blood vessels
    • A61F2/07Stent-grafts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L31/00Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/04Macromolecular materials
    • A61L31/06Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00Woven fabrics designed to make specified articles
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/33Ultrafine fibres, e.g. microfibres or nanofibres
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00Woven fabrics characterised by their shape
    • D03D3/02Tubular fabrics

Definitions

  • the present invention relates to a woven fabric suitably used for a medical device for treating a chest disease.
  • stent graft insertion is used in which a stent graft in which a spring-like metal called a stent is attached to a tubular artificial blood vessel is compressed and inserted into a catheter and placed open at the affected area.
  • an artificial heart valve made of biological tissue which is a substitute for the heart valve, a metal frame, and a polyester woven material called a skirt for preventing blood leakage is compressed and inserted into the catheter in the same manner as a stent graft, and the valve portion is inserted.
  • Transcatheter aortic valve replacement is used.
  • the occupied volume of the component member in the catheter is reduced, that is, the thickness of the tubular fabric used for the artificial blood vessel or artificial heart valve of the stent graft is reduced, or the diameter of the stent or metal frame is reduced.
  • Efforts are being made such as doing things and devising designs.
  • an ultrafine fiber having a single yarn fineness of 0.5 dtex is used, and the thickness is reduced by controlling the woven structure to achieve excellent blood leakage prevention.
  • the thickness and blood leakage resistance are achieved as in Patent Document 1 by using ultrafine fibers and performing calendar processing.
  • implantable medical devices are increasingly adapted to young people and are expected to be indwelled in the body for a long period of 10 years or more, so high durability is required.
  • Abrasion resistance which is one index, has a trade-off relationship, and in particular, implantable medical devices such as stent grafts and artificial heart valves placed in the thoracic aorta are placed in a strong blood flow and pulsatile environment.
  • As a textile used for a medical device for chest disease it is necessary to solve the conflicting problems (trade-off relationship) at the same time.
  • Patent Documents 1 and 2 relating to the invention of a woven fabric using ultrafine fibers having a single yarn fineness of 0.5 dtex or less do not disclose a technical idea for achieving both thinness and abrasion resistance.
  • a woven fabric for a medical device for thoracic disease which uses ultrafine polyester fibers and has improved wear resistance, has not been provided so far.
  • an object to be solved by the present invention is to provide a woven fabric for a medical device for chest disease, which contains ultrafine fibers and has high abrasion resistance.
  • the present inventors control the single yarn fineness / total fineness of the fibers used in the woven fabric, the crimp ratio of the warp yarn, and the crimp ratio of the weft yarn within a predetermined range.
  • a woven fabric for a medical device for chest disease having high abrasion resistance can be provided even if ultrafine fibers are used, and the present invention has been completed.
  • a textile for a chest disease medical device composed of at least two types of polyester multifilaments having different single yarn fineness, and the single yarn fineness of the at least two types of polyester multifilaments has the highest single yarn fineness of 0.5 dtex.
  • a polyester multifilament containing a filament of ultra 10 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged in the warp yarn, and among the at least two types of polyester multifilaments, the single yarn fineness is the smallest.
  • a polyester multifilament containing a filament of 0.5 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged on the weft yarn, and the weaving shrinkage (crimp) rate of the warp yarn conforming to the JIS L1096 8.7 B method is 0.2% or more.
  • a textile for a medical device for chest disease characterized in that the crimp rate of the weft yarn is 8.0% or less, the crimp rate of the weft yarn is 3.0% or more and 14.0% or less, and the crimp ratio of the weft yarn is larger than the crimp ratio of the warp yarn.
  • [4] The woven fabric for a chest disease medical device according to the above [3], wherein the compounding ratio of the polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less in the composite yarn is 15% by weight or more and 65% by weight or less.
  • [5] The above-mentioned [1] to [4], wherein the weft overlap rate (weft overlap rate) is 0.90 or more, and the warp overlap rate (warp overlap rate) is less than 0.90. Chest disease medical device textiles.
  • [6] The woven fabric for a chest disease medical device according to the above [5], wherein the CV value of the weft overlap rate is 0.1 or less and the CV value of the warp overlap rate is 0.1 or less.
  • the present invention is a woven fabric that can be suitably used for chest disease medical devices used for the treatment of the heart and vascular system because the abrasion resistance can be improved while using ultrafine fibers.
  • One embodiment of the present invention is a woven fabric for a chest disease medical device composed of at least two kinds of polyester multifilaments having different single yarn fineness, and the single yarn fineness is the largest among the at least two kinds of polyester multifilaments.
  • Polyester multifilaments containing filaments with a single yarn fineness of more than 0.5 dtex and 10 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less are arranged in the warp yarns, and among the at least two types of polyester multifilaments, the single yarn fineness is A polyester multifilament containing the smallest filament with a single yarn fineness of 0.5 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged on the weft yarn, and the warp yarn is crimped according to the JIS L1096 8.7 B method.
  • Chest disease medical treatment characterized in that the rate is 0.2% or more and 8.0% or less, the crimp rate of the weft is 3.0% or more and 14.0% or less, and the crimp rate of the weft is larger than the crimp rate of the warp. It is a textile for equipment.
  • Another embodiment of the present invention is a composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less, and having a total fineness of 20 dtex or more and 120 dtex or less.
  • a woven fabric for a medical device for chest disease wherein the composite yarn is arranged in a warp and / or a weft.
  • the fiber characteristics such as the single yarn fineness, the total fineness, and the crimp ratio of the polyester multifilament in the present embodiment are the characteristics of the yarn (decomposed yarn) extracted from the woven fabric unless otherwise specified.
  • the woven fabric for thoracic disease medical devices of the present embodiment is a woven fabric in which specific ultrafine fibers are arranged on weft threads, and the ultrafine fibers contain filaments having a single yarn fineness of 0.5 dtex or less and a total fineness of 7 dtex or more. It is a polyester multifilament of 120 dtex or less.
  • the single yarn fineness is the fineness per single yarn
  • the total fineness is the product of the fineness per single yarn and the number of single yarns.
  • the single yarn fineness of the ultrafine fiber is 0.5 dtex or less, which contributes to the thinning of the woven fabric, suppresses the water permeability that is an index of blood leakage to a low level, and gives the woven fabric flexibility and wrinkle resistance in the circumferential direction. Can be granted.
  • the single yarn fineness of the ultrafine fiber is preferably 0.4 dtex or less, more preferably 0.3 dtex or less.
  • the lower limit of the single yarn fineness of the ultrafine fiber is preferably 0.01 dtex or more, more preferably 0.03 dtex or more, and further preferably 0.1 dtex or more from the viewpoint of abrasion resistance.
  • the total fineness of the ultrafine fibers is 7 dtex or more and 120 dtex or less.
  • the required abrasion resistance can be satisfied, and the thickness of the woven fabric, which is preferable for reducing the outer diameter of the catheter, can be satisfied of 150 ⁇ m or less.
  • the total fineness of the ultrafine fibers is preferably 10 dtex or more and 100 dtex or less, and more preferably 30 dtex or more and 80 dtex or less, from the viewpoint of combining the abrasion resistance of the woven fabric, the thinning, and the practical physical properties as a woven fabric for implantable medical devices.
  • the weft of the fabric for chest disease medical equipment of the present embodiment is a polyester ultrafine fiber having a single yarn fineness of 0.5 dtex or less and a total fineness of 20 dtex or more and 90 dtex or less, and a polyester having a single yarn fineness of 0.5 dtex or more and 10 dtex or less and a total fineness of 20 dtex or more and 90 dtex or less.
  • the fiber may be composed of one type or a combination of two or more types depending on the purpose, and within a range that does not impair the object of the present invention, the single yarn fineness is 0.5 dtex or less and the total fineness is 20 dtex or more and 90 dtex or less.
  • One or a combination of two or more kinds of fiber materials different from polyester such as polyester ultrafine fibers and fluororesin fibers having a single yarn fineness of more than 0.5 dtex, may be used depending on the purpose.
  • the ultrafine fibers and other fibers may be twisted to form a composite fiber depending on the purpose, or may be arranged alternately or randomly.
  • the ultrafine fibers of the woven fabric for chest disease medical equipment of the present embodiment are preferably twisted, and the number of twisted yarns is preferably 50 times / m or more, more preferably 100 times. / M or more, most preferably 200 times / m or more.
  • the upper limit of the number of twisted yarns is preferably 800 times / m or less, more preferably 600 times / m or less, and most preferably 500 times / m or less.
  • ultrafine fibers fibers having a high fineness may be twisted by the number of twisted yarns, or untwisted yarns may be twisted together.
  • the total number of twisted yarns is preferably 50 times / m or more and 800 times / less.
  • the ultrafine fibers of the woven fabric for chest disease medical equipment of the present embodiment preferably have a tensile strength of 3.0 cN / dtex or more and a tensile elongation of 12% or more of the yarn (decomposed yarn) extracted from the woven fabric. ..
  • the tensile strength of the ultrafine polyester fiber (decomposed thread) is 3.0 cN / dtex or more, thread breakage due to friction with metal members such as the heart or blood vessels, sutures, and biological tissues is suppressed. Therefore, excellent wear resistance can be exhibited, and further, tearing of the sutured portion can be prevented.
  • the toughness is improved, the yarn breakage due to friction is suppressed, and excellent wear resistance is exhibited, and at the same time, the sutured portion with the metal member or the like is exhibited. Can be prevented from tearing.
  • polyester multifilaments having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a total fineness of 20 dtex or more and 120 dtex or less are arranged in the warp.
  • the lower limit of the single yarn fineness of regular fibers is more than 0.5 dtex and the total fineness is 20 dtex or more
  • the correlation with the ultrafine fibers of the specific fineness (single yarn fineness, total fineness) arranged in the weft is , It is possible to prevent the ultrafine fibers from protruding to the surface of the woven fabric and improve the wear resistance of the woven fabric.
  • the regular fiber preferably has a single yarn fineness of 1.0 dtex or more and a total fineness of 25 dtex or more.
  • the upper limit of the single yarn fineness of the regular fiber needs to be 10 dtex or less in the correlation with the ultrafine fiber of the specific fineness arranged in the weft.
  • the upper limit of the single yarn fineness of the regular fiber is preferably 8dtex or less, more preferably 6dtex or less, still more preferably 3dtex or less, and most preferably 2.5dtex. It is as follows.
  • the upper limit of the total fineness of regular fibers is 120 dtex or less, it is possible to suppress the protrusion of ultrafine fibers, which are wefts, to the surface of the woven fabric, and the thickness of the woven fabric, which is preferable for the purpose of reducing the diameter of the device, is 150 ⁇ m. The following can be realized.
  • the regular fiber of the woven fabric for chest disease medical equipment of the present embodiment is preferably twisted from the viewpoint of improving wear resistance, and the number of twisted yarns is preferably 100 times / m or more, more preferably 200 times. / M or more, most preferably 300 times / m or more.
  • the upper limit of the number of twisted yarns is preferably 1000 times / m or less, more preferably 700 times / m or less, and most preferably 800 times / m or less.
  • the textile for chest disease medical equipment of the present embodiment has a warp yarn crimp rate (based on JIS L1096 8.7 B method) of 0.2% or more and 8.0% or less, and a weft yarn crimp rate of 3.0% or more and 14.0% or less. And it is necessary that the crimp rate of the weft is larger than the crimp rate of the warp.
  • the crimp ratio of the warp By controlling the crimp ratio of the warp to 0.2% or more and 8.0% or less, the protrusion of the ultrafine fibers to the woven fabric surface is suppressed in the correlation with the ultrafine fibers specified in the present invention, and excellent wear resistance is obtained. Can be demonstrated.
  • the crimp ratio of the warp is preferably 0.3% or more and 7.5% or less, more preferably 1.0% or more and 7.0% or less, and further preferably 1.0% or more and 5.0. % Or less, 1.0% or more and 3.0% or less.
  • the crimp rate of the weft thread extracted from the woven fabric for chest disease medical equipment of the present embodiment must be 3.0% or more and 14.0% or less, and the weft thread must be crimped larger than the warp thread.
  • the crimp rate of the weft is 3.0% or more and is larger than the crimp rate of the warp, the filaments of the ultrafine fibers are prevented from being spread by the warp and the ultrafine fibers are prevented from protruding to the surface of the woven fabric, resulting in excellent abrasion resistance. In addition to being able to exhibit its properties, it works suitably for thinning the woven fabric and reducing the water permeability (preventing blood leakage).
  • the crimp ratio of the weft is 14.0% or less, the ultrafine fibers do not protrude on the surface of the woven fabric, and excellent abrasion resistance can be exhibited.
  • the crimp ratio of the weft is preferably 3.5% or more and 13.5% or less, more preferably 4.0% or more and 13.0% or less, and further preferably 7.0% from the viewpoint of abrasion resistance and woven fabric properties (thin film and water permeability). More than 13.0% or less.
  • the woven fabric of the present embodiment is controlled so that the weft and the warp are appropriately crimped, the opening in the warp direction and the weft direction of the sutured portion with the metal member is suppressed, and blood leakage occurs when the affected part is placed. It is also suitable from the viewpoint of difficulty.
  • the overlapping rate between adjacent weft threads is preferably 0.90 or more.
  • the overlap rate of the weft yarn containing the ultrafine fiber having a single yarn fineness of 0.5 dtex or less is 0.90 or more, the water permeability can be suppressed low and excellent blood leakage prevention property can be obtained.
  • the weft overlap ratio is an overlapping portion of adjacent wefts passing through the front surface and the back surface of the warp by X-ray CT of a woven fabric arbitrarily cut in the warp direction of 10 mm or more and the weft direction of 20 mm or more.
  • weft overlap rate 20 or more weft overlapping portions calculated by the following formula (1) by photographing 2 or more points at arbitrary points at a magnification of 50 or less.
  • the weft overlap rate is more preferably 0.95 or more from the viewpoint of obtaining a thinner woven fabric, better blood leakage resistance, and opening resistance when knotted with sutures.
  • the CV value of the weft overlap ratio is preferably 0.1 or less.
  • the CV value of the weft overlap rate is calculated by the following equation (2). If the CV value of the weft overlap rate is more than 0.1, that is, the variation of the weft overlap rate is large, even if the average value of the weft overlap rate is 0.90 or more, there are many parts where the weft overlap rate is less than 0.90. Since the weft is not crushed by the warp and becomes an elliptical shape in the portion and comes into direct contact with the worn part, it is preferentially rubbed and a hole is opened.
  • the CV value of the weft overlap ratio is 0.1 or less, the weft is crushed uniformly and evenly on the surface of the woven fabric, and excellent abrasion resistance is exhibited.
  • the CV value of the weft overlap rate is more preferably 0.09 or less, and most preferably 0.08 or less.
  • the overlapping rate of adjacent warp threads is less than 0.90.
  • the fabric used for medical equipment for treating chest diseases needs to have high blood-proof leakage property, and in order to achieve that purpose, both warp and weft are woven at high density, that is, adjacent warp threads are woven together.
  • -It is a general idea to bring the wefts closer to each other and set a high overlap rate
  • Patent Document 1 also states that the warp overlap rate is preferably 0.90 or more. However, from the viewpoint of improving wear resistance, this idea is in the opposite direction.
  • the warp overlap rate is preferably less than 0.90 from the viewpoint that the crimp rate of the weft can be easily controlled to 14% or less.
  • the lower limit of the warp overlap rate is preferably 0.60 or more, more preferably 0.70 or more.
  • the CV value of the warp overlap rate is preferably 0.10 or less.
  • the CV value of the warp overlap rate exceeds 0.10, that is, when the variation in the warp overlap rate is large, there is a part where the warp overlap rate exceeds 0.90 and a part where the warp overlap rate is less than 0.60.
  • Abrasion resistance may be deteriorated, and the latter may lead to partial deterioration of water permeability. There is concern that the former deterioration of wear resistance will cause holes to expand from there, even if only partially.
  • the CV value of the more preferable warp overlap ratio is 0.09 or less, and most preferably 0.08 or less.
  • the woven fabric of another embodiment of the present invention is a composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less, and has a total fineness of 20 dtex or more and 120 dtex.
  • the following composite yarn is a woven fabric in which the warp yarn and / or the weft yarn are arranged. Abrasion resistance is improved by blending the extra-fine polyester fiber with the thick polyester fiber, but another feature of the embodiment is that, for example, the extra-thick fiber having a single yarn fineness of more than 5 dtex is oriented.
  • the thickness of the woven fabric is much thinner than that of a woven fabric in which general regular fibers with a single yarn fineness of about 1 to 2 dtex are arranged in the warp and weft.
  • a feature of another embodiment using the composite yarn is that it exhibits high blood-proof leakage property (excellent low water permeability) even when thick fibers are blended. In order to express these characteristics more efficiently and stably, it is recommended to control the warp yarn overlap ratio, the weft yarn overlap ratio, and the respective CV values within the above-mentioned preferable ranges.
  • the composite yarn can be obtained by twisting ultrafine fibers and thick fibers (twisted yarn), entwining them by interlacing or the like, or by a method such as false twisting or covering.
  • the number of twisted yarns is preferably 50 or more and 800 times / m or less in order to maintain water permeability.
  • the blending ratio of the polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less in the composite yarn is preferably 15 to 65% by weight.
  • wear resistance is significantly improved compared to woven fabrics that use only ultrafine fibers for weft, and water permeability is 400 cc / cm 2 / min or less. Can be suppressed.
  • the polyester fiber constituting the woven fabric of the present embodiment is not particularly limited, and examples thereof include aromatic polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polycyclohexane terephthalate, and polyethylene terephthalate is most preferable. Further, fluororesin fibers such as PTFE and ETFE, polyamide fibers, polyolefin fibers and the like may be partially used as long as the desired effect is obtained. It is also a preferred embodiment that the woven fabric of the present embodiment partially uses conductive fibers containing metal fibers, carbon and the like in order to provide an external monitoring function for the purpose of prognosis observation.
  • the woven fabric structure of the woven fabric for chest disease medical equipment of the present embodiment includes plain weave, twill weave, satin weave, satin weave and the like, and the crimp ratio of the weft and warp yarns constituting the woven fabric is not particularly limited.
  • a plain weave structure or a twill weave structure is preferable from the viewpoint of controlling the range. Further, from the viewpoint of tear strength and improvement of tensile strength, it is possible to have a ripstop structure.
  • the woven fabric for chest disease medical equipment of the present embodiment may be a woven fabric in which sheet-shaped woven fabrics are sewn into a tubular shape, but the thickness of the sewn portion increases, which hinders the folding of the woven fabric into thin pieces. There is a risk of coming. Therefore, the woven fabric for a chest disease medical device of the present embodiment is preferably in the form of a tubular seamless woven fabric (woven fabric) from the viewpoint of realizing a smaller diameter of the implantable medical device and preventing blood leakage.
  • tubular woven fabric for the implantable medical device of the present embodiment may have a straight shape with no diameter change, a tapered shape with a diameter change, a shape including a tapered portion as a part, and a branched shape.
  • the shape may be a plurality of branches, and is not particularly limited.
  • the thickness of the woven fabric for chest disease medical equipment of the present embodiment is particularly limited as long as it is appropriately designed according to the total fineness and single yarn fineness of the fibers used, the weaving density, and the weaving structure according to the site to be used.
  • it is preferably 10 ⁇ m or more and 150 ⁇ m or less, and more preferably 15 ⁇ m or more and 130 ⁇ m or less.
  • the thickness of the woven fabric is defined by the average value of the values measured by using the thickness gauge at 10 woven fabrics arbitrarily selected in the circumferential direction and the length direction of the woven fabric.
  • the woven fabric for chest disease medical equipment of this embodiment is based on ANSI / AAMI / ISO 7198: 1998/2001 after a wear test of 5000 times using a Martindale wear tester conforming to JIS L 1096 8.19.5 E method.
  • the burst strength measured according to the burst strength test is preferably 140 N or more, more preferably 150 N or more.
  • the retention rate (%) of the burst strength in the wear test that is, ⁇ (burst strength after the wear test) / (burst strength before the wear test) ⁇ ⁇ 100 is preferably 65% or more, more preferably. It is preferably 75% or more.
  • the water permeability of the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 is preferably 400 cc / cm 2 / min or less.
  • the water permeability of the woven fabric is an index for preventing blood leakage, and when the water permeability is 400 cc / cm 2 / min or less, blood leakage from the wall surface of the woven fabric can be suppressed.
  • the water permeability of the woven fabric for chest disease medical devices of the present embodiment is more preferably 300 cc / cm 2 / min or less, further 250 cc / cm 2 / min or less, and most preferably 200 cc / cm 2 / min. Is.
  • the woven fabric for a chest disease medical device of the present embodiment may have its end cut or a hole may be formed on the side surface according to the shape of a metal member or other members to be combined. It is preferable that the cut portion and the periphery of the hole are treated by sewing or heat melting so that the fiber is not loosened or the woven fabric is not torn. When making holes, it is sufficient to appropriately design the number and diameter of the holes according to the number and diameter of blood vessels around the site where the stent fabric is attached.
  • the shape of the hole is not limited, but may be circular, oval, triangular, square, polygonal, or random.
  • the woven fabric for a medical device for chest disease of the present embodiment may be attached with a transmission marker.
  • the woven fabric for a chest disease medical device of the present embodiment may be coated with an antithrombotic material, collagen, gelatin, heparin, acetylsalicylic acid, polyurethane or the like within a range that does not deviate from requirements such as a desired thickness and outer diameter.
  • the woven fabric for a medical device for chest disease of the present embodiment can also be pressed or crimped with a calendar or the like as long as the object of the present invention is not impaired.
  • Another embodiment of the present invention is a device for a medical device used for treating a heart or vascular disease in which the above-mentioned fabric is used as a component of the medical device.
  • the target device is not particularly limited, and examples thereof include a stent graft used for treating thoracic aorta and aortic dissection, and a transcatheter aortic valve replacement device used for treating aortic stenosis. It should be noted that it is not denied that it is used as a member for treating aneurysms formed in the abdominal aorta and the iliac artery.
  • the medical device in which the constituent members such as a woven fabric and a metal member such as a stent or a metal frame are bound and fixed with sutures is exposed to strong blood flow and constant pulsation in an indwelling part such as a heart or an artery. Friction with metal occurs at the sutured part, friction with living tissue at the indwelling part, and friction with blood fluid.
  • the woven fabric of the present invention is constantly worn by friction with solid and liquid due to the above-mentioned design. It is suppressed.
  • a method for producing a woven fabric for a medical device for chest disease will be described, but the present invention is not intended to be limited to these methods.
  • PET polyethylene terephthalate
  • the material is not limited to this material.
  • a so-called direct melt spinning method is adopted in which ultrafine fibers and regular fibers having a predetermined single yarn fineness and total fineness are produced by melt spinning and subsequent drawing. Is preferable.
  • the ultrafine fibers and regular fibers are preferable to twist at a predetermined number of times from the viewpoint of controlling wear resistance and low water permeability, but they have excellent process passability (thread breakage during weaving). From the viewpoint of suppressing fluffing and fluffing), it is preferable to apply plying to impart convergence.
  • a known or conventional twisting method can be used, and examples thereof include known twisting machines such as a ring twisting machine, a double twister, an Italian twisting machine, a covering machine, and a false twisting machine.
  • the form of the twisted yarn may be a single-twisted yarn in which one or two or more filaments are aligned and twisted in the S or Z direction, or two or more such single-twisted yarns are aligned and further twisted upward. It may be a twisted yarn overlaid with.
  • the number of twists of the ultrafine fibers used for the weft is preferably 50 times / m or more and 800 times / m or less. By setting the number of twists to 50 times / m or more, smoothness is improved, stresses such as tension and bending are uniformly applied to the filament, problems of fluff and yarn breakage during weaving are reduced, and process stability. It leads to the improvement of.
  • the number of twists of the regular fibers used for the warp yarns is preferably 100 times / m or more, more preferably 200 times / m or more, from the viewpoint of suppressing rubbing between the warp yarns in the weaving process.
  • the arrangement of the thread sheath core structure can be arbitrarily controlled.
  • the looser tension can be arranged on the sheath side, and the higher tension yarn can be arranged on the core side.
  • the number of threads to be mixed and the arrangement of the sheath core structure may be arbitrarily set according to the purpose.
  • a composite yarn is manufactured by false twisting
  • a plurality of yarns having different fineness may be pulled out at the same time, and the plurality of yarns may be falsely twisted and mixed at the same time.
  • a method of more uniform mixing using air pressure in the interlacing process up to the winding portion may be adopted.
  • the place where the interlacing is performed is not limited to after the false twisted portion, but may be before, and may be performed according to an arbitrary purpose.
  • the sheath core structure When mixing yarns by covering, it has a sheath core structure, and multiple yarns can be arranged on the sheath side by preparing a double covering machine or yarns mixed in advance by twisting or interlacing.
  • the arrangement of the threads may be arbitrarily selected according to the purpose.
  • a tubular seamless woven fabric can be manufactured using the fibers obtained by the above manufacturing method.
  • the loom for producing the tubular seamless woven fabric is not particularly limited, but it is possible to use a shuttle loom through which the weft is passed by the reciprocating motion of the shuttle to weave the ears of the woven fabric (folded part of the woven fabric). It is preferable from the viewpoint of suppressing the decrease in density and making the thickness of the woven fabric uniform.
  • a jacquard type opening device, a dobby type opening device, or the like can be used.
  • the weaving density (CF) of the weft and the warp and the number of twists of the weft are appropriately designed so as to be less than, the warp tension at the time of weaving and the pull-out tension of the weft from the shuttle are adjusted, and the warp and / or the weft is heat-shrinked. Any of the rate and heat setting after weaving, post-treatment condition adjustment such as refining, or a method of appropriately combining these conditions can be mentioned.
  • the adjustment range of the warp tension is preferably 0.5 to 1.5 g / dtex, more preferably 0.6 to 1.3 g / dtex, and further preferably 0.7 to 1.2 g / dtex. is there.
  • the pull-out tension of the weft is preferably 0.1 g / dtex or more and 0.5 g / dtex or less from the viewpoint of suppressing an increase in the crimp rate of the weft due to weaving shrinkage in the circumferential direction after weaving.
  • the weft tension is less than 0.1 g / dtex, the weft is less likely to be crushed by the warp and the crimp rate tends to be high, and the yarn loosens when the weft is driven, which makes weaving with continuous and stable quality difficult.
  • the weft pull-out tension exceeds 0.5 g / dtex, the crimp rate of the weft tends to increase as well. This is due to weaving shrinkage after weaving.
  • the tension at the time of driving the weft is more preferably 0.2 g / dtex or more and 0.4 g / dtex or less from the viewpoint of the uniformity of the crimp ratio of the warp and the weft of the entire fabric.
  • the warp tension and the weft tension can be controlled within the above range to control the crimp rate of the warp and the weft.
  • the heat setting conditions are constant tension, 10 to 30 at 150 to 200 ° C.
  • the crimp rate of the warp and the weft can be controlled by appropriately changing the weft brand, the warp brand, and the weaving condition within the range of 10 to 150 minutes at the refining condition of 60 to 90 ° C. for 1 minute.
  • the weft crimp ratio is determined by adjusting the single yarn fineness / total fineness, the warp overlap ratio, the thick fineness blending ratio of the composite yarn, and the weft pull-out tension and the warp tension as the manufacturing conditions, so that the weft overlap ratio is CF (In particular, weft density), number of weft twists, warp overlap ratio, and weft pull-out tension and warp tension are adjusted as manufacturing conditions, and the weft overlap ratio CV value is determined by the number of weft twists, the composition ratio of the thickness of the composite yarn, and the composite yarn.
  • CF weft density
  • number of weft twists, warp overlap ratio, and weft pull-out tension and warp tension are adjusted as manufacturing conditions
  • the weft overlap ratio CV value is determined by the number of weft twists, the composition ratio of the thickness of the composite yarn, and the composite yarn.
  • the warp crimp ratio can be adjusted by adjusting the manufacturing conditions (warp tension, weft pull-out tension), and the warp overlap ratio can be adjusted to CF (especially warp).
  • the warp overlap ratio CV value can be controlled by adjusting the warp tension balance (number of reed threads), manufacturing conditions (weft pull-out tension), and the number of warp twists. Can be done.
  • the woven fabric for chest disease medical devices of the present embodiment can exert an action effect that wear resistance can be improved while using ultrafine fibers. ..
  • the woven fabric woven by the above method is combined with various members for the target medical device using sutures, and inserted into a catheter to treat a chest such as a heart or vascular disease, that is, a medical device for treating chest disease.
  • a medical device for treating chest disease that is, a medical device for treating chest disease.
  • these therapeutic devices can be used for the treatment of the chest such as heart and vascular diseases.
  • the main measured values of physical properties were measured by the following methods.
  • the total fineness (dtex) is a value obtained by winding a fiber bundle 50 times with a skein of 1 m per circumference, measuring the weight of the thread, and multiplying it by 200.
  • the single yarn fineness (dtex) is a value obtained by dividing the total fineness obtained by the above method by the number of single yarns. (Evaluation from woven fabric, total fineness of decomposed yarn / single yarn fineness) Collect three 200 mm x 200 mm test pieces.
  • Each of the warp and weft threads is unwound and spread thinly on a scanning electron microscope (SEM) sample table, and SEM observation is performed at a magnification equivalent to 500 to 1000 times.
  • SEM scanning electron microscope
  • a line is drawn in the direction of the fiber bundle and the direction perpendicular to the fiber bundle, 10 single yarns intersecting the line are randomly selected, and the diameter (fiber diameter) is measured from the enlarged image.
  • the fineness is converted from the average value of the fiber diameters of 10 single yarns to obtain the single yarn fineness of the decomposed yarn.
  • the product of the single yarn fineness of the decomposed yarn and the number of single yarns of the raw yarn is defined as the total fineness of the decomposed yarn.
  • the fiber diameters of 10 single yarns are measured for each fiber type in the same manner as described above, and the single yarn fineness and the total fineness are calculated.
  • Warp or weft cover factor (CFw, CFf)
  • the cover factor is calculated by the following formula using the weaving density of (3) above.
  • Warp cover factor (CFw) (total warp fineness: dtex) 1/2 x (warp weaving density: book / 2.54 cm)
  • Weft cover factor (CFf) (total weft fineness: dtex) 1/2 x (weft weaving density: book / 2.54 cm)
  • CF CFw + CFf
  • Weaving shrinkage rate Measure according to the method described in JIS L-1096 (2010) 8.7 B method. Mark a distance of 200 mm at three points in each of the warp and weft directions, untie the warp and weft in this mark, measure the length (mm) stretched straight under the initial load, and shrink the weave. Is calculated. The warp and weft threads extracted from the woven fabric are measured for 20 threads each, and the average value is shown.
  • Rupture strength retention rate (%) Rupture strength after wear test / Rupture strength before wear test x 100 [Abrasion resistance test] Using a Martindale wear tester that complies with JIS L 1096 8.19.5 E method, the test is performed with a pressing load for clothing (9 kPa) and the number of wears is 5000 times.
  • the CV value of the thread overlap ratio a is calculated by the following formula (2).
  • the CV values of the warp overlap rate A and the warp overlap rate A are determined from the X-ray CT image taken in the same manner as the measurement of the weft overlap rate according to the following equation (3): , And the following equation (4): , Each is calculated.
  • Example 1 A polyester fiber with a total fineness of 31dtex / 22F, a single yarn fineness of 1.4dtex, a tensile strength of 5.0cN / dtex, and a tensile elongation of 31% is twisted 500 times / m (S direction twist) for the warp, and the total fineness is 42dtex for the weft. / 140F, single yarn fineness 0.3dtex, tensile strength 4.2cN / dtex, ultrafine fiber with tensile elongation 34% is twisted 100 times / m (S direction twist) to make a shuttle loom equipped with an electronic jacquard opening device.
  • a plain woven tubular seamless woven fabric having an inner diameter of 28.5 mm was produced with a warp tension of 0.7 g / dtex and a weft pull-out tension of 8 g (0.2 g / dtex). Further, this woven fabric was preheated (at 160 ° C. for 20 minutes), smelted (30 minutes ⁇ 3 times with hot water at 80 ° C.), and finally heat-set (180 ° C. for 20 minutes).
  • Table 1 The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 2 For the weft, ultrafine fibers with a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, and a tensile elongation of 34% and the regular fibers used for the warp of Example 1 were used 100 times / m (S direction). Twisting) Weaving, preheating set, scouring, and final heat setting were performed in the same manner as in Example 1 except that the fused and twisted fibers were used. The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 3 Except for the alternating use of ultrafine fibers having a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, and a tensile elongation of 34% for the weft, and the regular fibers used for the warp of Example 1. Weaving, pre-heating set, scouring, and final heat setting were performed in the same manner as in Example 1. The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 4 The weft uses ultrafine fibers with a total fineness of 23dtex / 140F, a single yarn fineness of 0.2dtex, a tensile strength of 4.0cN / dtex, and a tensile elongation of 39%, with a warp tension of 0.7g / dtex and a weft pull-out tension of 6g (0.3g / dtex).
  • Weaving, preheating set, scouring, and final heat setting were performed in the same manner as in Example 1 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced.
  • the evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 5 Weft has a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, an ultrafine fiber with a tensile elongation of 34%, a total fineness of 42dtex / 8F, a single yarn fineness of 5.3dtex, and a tensile strength of 4.0cN / dtex. Same as Example 1 except that a non-twisted regular fiber with a tensile elongation of 37% and a fiber twisted 100 times / m (S direction twist) are woven at a weft drawing tension of 17 g (0.2 g / dtex). Weaving, pre-heating set, scouring, and final heat setting were performed. The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 6 Weaving, preheat set, scouring, and final heat set are the same as in Example 1, except that the composite yarn obtained by twisting the ultrafine fibers and regular fibers described in Example 2 is further interlaced with an air pressure of 0.02 Mpa. Was done. The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 7 A woven fabric was produced in the same manner as in Example 2 except that the pull-out tension of the composite yarn of the weft yarn was 35 g (0.5 g / dtex). The evaluation results of the obtained woven fabric are shown in Table 1 below.
  • Example 1 A woven fabric was produced in the same manner as in Example 4 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced with a warp tension of 1.6 g / dtex.
  • the evaluation results of the obtained woven fabric are shown in Table 2 below.
  • the crimp rate of the weft was 14.8%, and the ultrafine fibers of the weft were projected on the surface of the woven fabric, so that the burst strength was significantly reduced after the abrasion test.
  • Example 2 A woven fabric was produced in the same manner as in Example 1 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced with a warp tension of 0.9 g / dtex and a weft pull-out tension of 3 g (0.07 g / dtex).
  • the evaluation results of the obtained woven fabric are shown in Table 2 below.
  • the crimp rate of the weft was 14.5%, and the ultrafine fibers of the weft were projected on the surface of the woven fabric, so that the burst strength was significantly reduced after the abrasion test.
  • Example 3 A woven fabric was produced in the same manner as in Example 1 except that the warp density of Example 2 was set high (214 threads / inch) with respect to the warp density of 200 threads / inch. The evaluation results of the obtained woven fabric are shown in Table 2 below.
  • a specific polyester multifilament regular fiber is arranged on the warp, and a certain polyester multifilament ultrafine fiber containing a specific filament with a single yarn fineness of 0.5 dtex or less is arranged on the weft.
  • the weaving shrinkage (crimp) rate in the range of 0.2% or more and 8.0% or less
  • the weft yarn crimp rate in the range of 3.0% or more and 14.0% or less
  • the weft yarn crimp rate in a range larger than the warp yarn crimp rate. Since the protrusion of the ultrafine fibers to the surface of the woven fabric is suppressed and the wear resistance is improved, it can be suitably used as a woven fabric for medical equipment for chest diseases, which requires particularly high wear resistance.

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Abstract

Provided is a woven fabric to be used in a medical device for chest disease, said woven fabric comprising ultrafine fibers and having high wear resistance. This woven fabric to be used in a medical device for chest disease, which comprises at least two kinds of polyester multifilaments having different single fiber finenesses, is characterized in that: among the at least two kinds of polyester multifilaments, polyester multifilaments having the largest single fiber fineness, comprising filaments with a single fiber fineness of larger than 0.5 dtex and not larger than 10 dtex and having a total fineness of 7-120 dtex inclusive are arranged as warps; among the at least two kinds of polyester multifilaments, polyester multifilaments having the smallest single fiber fineness, comprising filaments with a single fiber fineness of 0.5 dtex or smaller and having a total fineness of 7-120 dtex inclusive are arranged as wefts; the weaving shrinkage (crimping) rate measured in accordance with JIS L1096 8.7 B of the warps is 0.2-8.0% inclusive; the crimping rate of the wefts is 3.0-14.0% inclusive; and the crimping rate of the wefts is larger than the crimping rate of the warps.

Description

胸部疾患医療機器用織物及び胸部疾患医療機器Textiles for chest disease medical devices and chest disease medical devices
 本発明は、胸部疾患治療用医療機器に好適に用いられる織物に関する。 The present invention relates to a woven fabric suitably used for a medical device for treating a chest disease.
 高齢化と食生活の欧米化に伴い、虚血性心疾患、弁膜症、大動脈瘤、大動脈解離等の心臓・血管系疾患の患者数は世界的に増加傾向にある。近年の医療技術、医療機器の進歩により、これらの疾患の治療は外科的手術から経カテーテル術にシフトし低侵襲化しており、患者への身体的負担が大きく軽減されている。例えば、大動脈瘤の治療においては、筒状の人工血管にステントと呼ばれるバネ状の金属を取り付けたステントグラフトをカテーテルに圧縮挿入し、患部で開放留置するステントグラフト内挿術が用いられており、また弁膜症等の治療においては、心臓弁の代替である生体組織、金属フレーム及び血液漏れを防止するためのスカートと呼ばれるポリエステル製の織物からなる人工心臓弁をステントグラフト同様にカテーテルに圧縮挿入し、弁部に留置する経カテーテル大動脈弁置換術が用いられる。一方で、患者の更なる身体的負担軽減やアクセス損傷リスク軽減のために、これら内挿術用デバイスのカテーテルの細径化が望まれている。カテーテルの細径化の手段としては、構成部材のカテーテル内における占有体積ダウン、つまりステントグラフトの人工血管や人工心臓弁に用いられる筒状織物の厚みを薄くする、或いはステントや金属フレームの径を細くしたり、デザインを工夫したりなどの取り組みが行われている。例えば、以下の特許文献1では、単糸繊度0.5dtexの極細繊維を用い、かつ、織構造を制御することで厚みを薄くして、優れた防血液漏れ性を達成している。また、以下の特許文献2では、極細繊維を用い、カレンダー加工することで、特許文献1と同様に厚みと防血液漏れ性を達成している。 With the aging of the population and the westernization of eating habits, the number of patients with cardiovascular diseases such as ischemic heart disease, valvular disease, aortic aneurysm, and aortic dissection is increasing worldwide. Due to recent advances in medical technology and medical equipment, the treatment of these diseases has shifted from surgical surgery to transcatheter surgery and has become less invasive, greatly reducing the physical burden on patients. For example, in the treatment of aortic aneurysm, stent graft insertion is used in which a stent graft in which a spring-like metal called a stent is attached to a tubular artificial blood vessel is compressed and inserted into a catheter and placed open at the affected area. In the treatment of illness, an artificial heart valve made of biological tissue, which is a substitute for the heart valve, a metal frame, and a polyester woven material called a skirt for preventing blood leakage is compressed and inserted into the catheter in the same manner as a stent graft, and the valve portion is inserted. Transcatheter aortic valve replacement is used. On the other hand, in order to further reduce the physical burden on the patient and reduce the risk of access damage, it is desired to reduce the diameter of the catheter of these interpolation devices. As a means of reducing the diameter of the catheter, the occupied volume of the component member in the catheter is reduced, that is, the thickness of the tubular fabric used for the artificial blood vessel or artificial heart valve of the stent graft is reduced, or the diameter of the stent or metal frame is reduced. Efforts are being made such as doing things and devising designs. For example, in Patent Document 1 below, an ultrafine fiber having a single yarn fineness of 0.5 dtex is used, and the thickness is reduced by controlling the woven structure to achieve excellent blood leakage prevention. Further, in the following Patent Document 2, the thickness and blood leakage resistance are achieved as in Patent Document 1 by using ultrafine fibers and performing calendar processing.
 他方、植込み型医療機器は若年層への適応が増加傾向にあり、10年以上の長期にわたり体内に留置されることが想定されるため高い耐久性が求められるが、繊維の細さと耐久性のひとつの指標である耐摩耗性はトレードオフの関係にあり、特に胸部大動脈に留置されるステントグラフトや人工心臓弁等の植込み型医療機器は強い血流と拍動環境下に留置されるため、これらの胸部疾患医療機器に用いられる織物としては、前記相反する課題(トレードオフの関係)を同時に解決する必要がある。しかしながら、単糸繊度0.5dtex以下の極細繊維を用いた織物の発明に関する特許文献1及び2には、薄さと耐摩耗性を両立させるための技術的思想は開示されていない。
 このように、ポリエステルの極細繊維を用いながら、耐摩耗性向上させた胸部疾患医療機器用織物はこれまで提供されていない。
On the other hand, implantable medical devices are increasingly adapted to young people and are expected to be indwelled in the body for a long period of 10 years or more, so high durability is required. Abrasion resistance, which is one index, has a trade-off relationship, and in particular, implantable medical devices such as stent grafts and artificial heart valves placed in the thoracic aorta are placed in a strong blood flow and pulsatile environment. As a textile used for a medical device for chest disease, it is necessary to solve the conflicting problems (trade-off relationship) at the same time. However, Patent Documents 1 and 2 relating to the invention of a woven fabric using ultrafine fibers having a single yarn fineness of 0.5 dtex or less do not disclose a technical idea for achieving both thinness and abrasion resistance.
As described above, a woven fabric for a medical device for thoracic disease, which uses ultrafine polyester fibers and has improved wear resistance, has not been provided so far.
特許第6438692号公報Japanese Patent No. 6438692 特開2011-245283号公報Japanese Unexamined Patent Publication No. 2011-245283
 以上の従来技術に鑑み、本発明が解決しようとする課題は、極細繊維を含み、かつ、耐摩耗性が高い胸部疾患医療機器用織物を提供することである。 In view of the above prior art, an object to be solved by the present invention is to provide a woven fabric for a medical device for chest disease, which contains ultrafine fibers and has high abrasion resistance.
 本発明者らは、上記課題を解決すべく、鋭意検討し実験を重ねた結果、織物に用いられる繊維の単糸繊度・総繊度、経糸のクリンプ率と緯糸のクリンプ率を所定範囲に制御することで、極細繊維を用いたとしても、高い耐摩耗性を有する胸部疾患医療機器用織物を提供することができることを予想外に見出し、本発明を完成するに至ったものである。 As a result of diligent studies and experiments to solve the above problems, the present inventors control the single yarn fineness / total fineness of the fibers used in the woven fabric, the crimp ratio of the warp yarn, and the crimp ratio of the weft yarn within a predetermined range. As a result, it was unexpectedly found that a woven fabric for a medical device for chest disease having high abrasion resistance can be provided even if ultrafine fibers are used, and the present invention has been completed.
 すなわち、本発明は以下のとおりのものである。
 [1]単糸繊度が異なる少なくとも2種のポリエステルマルチフィラメントからなる胸部疾患医療機器用織物であって、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も大きい、単糸繊度0.5dtex超10dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、経糸に配され、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も小さい、単糸繊度0.5dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、緯糸に配され、該経糸のJIS L1096 8.7 B法に準拠する織縮み(クリンプ)率が0.2%以上8.0%以下であり、該緯糸のクリンプ率が3.0%以上14.0%以下であり、かつ、該緯糸のクリンプ率が該経糸のクリンプ率より大きいことを特徴とする胸部疾患医療機器用織物。
 [2]前記単糸繊度が最も大きいポリエステルマルチフィラメントの単糸繊度が0.5dtex超2.5dtex以下である、前記[1]に記載の胸部疾患医療機器用織物。
 [3]単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントと、単糸繊度0.5dtex以下のポリエステルマルチフィラメントとの複合糸であって、総繊度20dtex以上120dtex以下である該複合糸が、経糸及び/又は緯糸に配されていることを特徴とする胸部疾患医療機器用織物。
 [4]前記複合糸の、前記単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントの配合比率が15重量%以上65重量%以下である、前記[3]に記載の胸部疾患医療機器用織物。
 [5]前記緯糸の重なり率(緯糸重なり率)が0.90以上であり、かつ、前記経糸の重なり率(経糸重なり率)が0.90未満である、前記[1]~[4]のいずれかに記載の胸部疾患医療機器用織物。
 [6]前記緯糸重なり率のCV値が0.1以下であり、かつ、前記経糸重なり率のCV値が0.1以下である、前記[5]に記載の胸部疾患医療機器用織物。
 [7]JIS L 1096 8.19.5 E法に準拠するマーチンデール摩耗試験機を用いた摩耗回数5000回の摩耗試験後のANSI/AAMI/ISO 7198:1998/2001に準拠した織物の破裂強度が、140N以上である、前記[1]~[6]のいずれかに記載の胸部疾患医療機器用織物。
 [8]前記摩耗試験前後における破裂強度の保持率が、65%以上である、前記[7]に記載の胸部疾患医療機器用織物。
 [9]ANSI/AAMI/ISO 7198:1998/2001に準拠した織物の透水性が、400cc/cm2/min以下である、前記[1]~[8]のいずれかに記載の胸部疾患医療機器用織物。
 [10]前記[1]~[9]のいずれかに記載の胸部疾患医療機器用織物の内側面及び/又は外側面に金属部材を縫合糸により縫合・固定された胸部疾患治療用医療機器。
 [11]前記胸部疾患治療用医療機器が、胸部大動脈瘤用治療用デバイスである、前記[10]に記載の胸部疾患治療用医療機器。
 [12]前記胸部疾患治療用医療機器が、胸部大動脈弁置換術用デバイスである、前記[10]に記載の胸部疾患治療用医療機器。
That is, the present invention is as follows.
[1] A textile for a chest disease medical device composed of at least two types of polyester multifilaments having different single yarn fineness, and the single yarn fineness of the at least two types of polyester multifilaments has the highest single yarn fineness of 0.5 dtex. A polyester multifilament containing a filament of ultra 10 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged in the warp yarn, and among the at least two types of polyester multifilaments, the single yarn fineness is the smallest. A polyester multifilament containing a filament of 0.5 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged on the weft yarn, and the weaving shrinkage (crimp) rate of the warp yarn conforming to the JIS L1096 8.7 B method is 0.2% or more. A textile for a medical device for chest disease, characterized in that the crimp rate of the weft yarn is 8.0% or less, the crimp rate of the weft yarn is 3.0% or more and 14.0% or less, and the crimp ratio of the weft yarn is larger than the crimp ratio of the warp yarn.
[2] The woven fabric for a chest disease medical device according to the above [1], wherein the polyester multifilament having the highest single yarn fineness has a single yarn fineness of more than 0.5 dtex and 2.5 dtex or less.
[3] A composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less, and the total fineness of the composite yarn is 20 dtex or more and 120 dtex or less. / Or a woven fabric for thoracic disease medical devices, which is arranged on weft threads.
[4] The woven fabric for a chest disease medical device according to the above [3], wherein the compounding ratio of the polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less in the composite yarn is 15% by weight or more and 65% by weight or less.
[5] The above-mentioned [1] to [4], wherein the weft overlap rate (weft overlap rate) is 0.90 or more, and the warp overlap rate (warp overlap rate) is less than 0.90. Chest disease medical device textiles.
[6] The woven fabric for a chest disease medical device according to the above [5], wherein the CV value of the weft overlap rate is 0.1 or less and the CV value of the warp overlap rate is 0.1 or less.
[7] The burst strength of the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 after the abrasion test of 5000 times using the Martindale abrasion tester conforming to JIS L 1096 8.19.5 E method. The woven fabric for a medical device for chest disease according to any one of the above [1] to [6], which is 140 N or more.
[8] The woven fabric for a medical device for chest disease according to the above [7], wherein the retention rate of the burst strength before and after the wear test is 65% or more.
[9] The chest disease medical device according to any one of [1] to [8] above, wherein the water permeability of the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 is 400 cc / cm 2 / min or less. Textile for.
[10] The medical device for treating chest disease according to any one of [1] to [9] above, wherein a metal member is sutured and fixed to the inner surface and / or outer surface of the woven fabric for chest disease medical device.
[11] The medical device for treating thoracic disease according to the above [10], wherein the medical device for treating thoracic disease is a device for treating thoracic aortic aneurysm.
[12] The medical device for treating thoracic disease according to the above [10], wherein the medical device for treating thoracic disease is a device for thoracic aortic valve replacement.
 本発明は極細繊維を用いながら、耐摩耗性を向上させることができる為、心臓・血管系の治療に用いられる胸部疾患医療機器に好適に利用可能な織物である。 The present invention is a woven fabric that can be suitably used for chest disease medical devices used for the treatment of the heart and vascular system because the abrasion resistance can be improved while using ultrafine fibers.
緯糸重なり率の算出のための説明図である。It is explanatory drawing for calculation of the weft overlap rate. 経糸重なり率の算出のための説明図である。It is explanatory drawing for calculation of the warp overlap ratio.
 以下、本発明の実施形態を詳細に説明する。
 本発明の1の実施形態は、単糸繊度が異なる少なくとも2種のポリエステルマルチフィラメントからなる胸部疾患医療機器用織物であって、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も大きい、単糸繊度0.5dtex超10dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、経糸に配され、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も小さい、単糸繊度0.5dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、緯糸に配され、該経糸のJIS L1096 8.7 B法に準拠する織縮み(クリンプ)率が0.2%以上8.0%以下であり、該緯糸のクリンプ率が3.0%以上14.0%以下であり、かつ、該緯糸のクリンプ率が該経糸のクリンプ率より大きいことを特徴とする胸部疾患医療機器用織物である。
Hereinafter, embodiments of the present invention will be described in detail.
One embodiment of the present invention is a woven fabric for a chest disease medical device composed of at least two kinds of polyester multifilaments having different single yarn fineness, and the single yarn fineness is the largest among the at least two kinds of polyester multifilaments. , Polyester multifilaments containing filaments with a single yarn fineness of more than 0.5 dtex and 10 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less are arranged in the warp yarns, and among the at least two types of polyester multifilaments, the single yarn fineness is A polyester multifilament containing the smallest filament with a single yarn fineness of 0.5 dtex or less and having a total fineness of 7 dtex or more and 120 dtex or less is arranged on the weft yarn, and the warp yarn is crimped according to the JIS L1096 8.7 B method. ) Chest disease medical treatment characterized in that the rate is 0.2% or more and 8.0% or less, the crimp rate of the weft is 3.0% or more and 14.0% or less, and the crimp rate of the weft is larger than the crimp rate of the warp. It is a textile for equipment.
 また、本発明の他の実施形態は、単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントと、単糸繊度0.5dtex以下のポリエステルマルチフィラメントとの複合糸であって、総繊度20dtex以上120dtex以下である該複合糸が経糸及び/又は緯糸に配されていることを特徴とする胸部疾患医療機器用織物である。 Another embodiment of the present invention is a composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less, and having a total fineness of 20 dtex or more and 120 dtex or less. A woven fabric for a medical device for chest disease, wherein the composite yarn is arranged in a warp and / or a weft.
 尚、本実施形態におけるポリエステルマルチフィラメントの単糸繊度、総繊度、クリンプ率等の繊維特性は、特に規定しない限り織物から抜き出した糸(分解糸)の特性である。 The fiber characteristics such as the single yarn fineness, the total fineness, and the crimp ratio of the polyester multifilament in the present embodiment are the characteristics of the yarn (decomposed yarn) extracted from the woven fabric unless otherwise specified.
[緯糸]
 本実施形態の胸部疾患医療機器用織物は、特定の極細繊維が緯糸に配された織物であり、当該極細繊維は、単糸繊度が0.5dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下のポリエステルマルチフィラメントである。ここで、単糸繊度とは単糸1本あたりの繊度であり、総繊度とは、単糸1本あたりの繊度と単糸数の積である。極細繊維の単糸繊度が0.5dtex以下であることで、織物の薄地化に寄与するとともに、血液漏れの指標となる透水性を低く抑制し、かつ織物に周方向の柔軟性と防シワ性を付与することができる。極細繊維の単糸繊度は好ましくは0.4dtex以下、より好ましくは0.3dtex以下である。他方、極細繊維の単糸繊度の下限は、耐摩耗性の観点から、0.01dtex以上が好ましく、より好ましくは0.03dtex以上、さらに好ましくは0.1dtex以上である。極細繊維の総繊度は、7dtex以上120dtex以下である。総繊度が前記範囲であることで、求められる耐摩耗性を満足できるとともに、カテーテル外径の細径化のために好ましい織物の厚みである150μm以下を満たすことができる。織物の耐摩耗性、薄膜化、さらには植込み医療機器用織物としての実用物性を兼備するという観点から、極細繊維の総繊度は10dtex以上100dtex以下が好ましく、より好ましくは30dtex以上80dtex以下である。
[Weft]
The woven fabric for thoracic disease medical devices of the present embodiment is a woven fabric in which specific ultrafine fibers are arranged on weft threads, and the ultrafine fibers contain filaments having a single yarn fineness of 0.5 dtex or less and a total fineness of 7 dtex or more. It is a polyester multifilament of 120 dtex or less. Here, the single yarn fineness is the fineness per single yarn, and the total fineness is the product of the fineness per single yarn and the number of single yarns. The single yarn fineness of the ultrafine fiber is 0.5 dtex or less, which contributes to the thinning of the woven fabric, suppresses the water permeability that is an index of blood leakage to a low level, and gives the woven fabric flexibility and wrinkle resistance in the circumferential direction. Can be granted. The single yarn fineness of the ultrafine fiber is preferably 0.4 dtex or less, more preferably 0.3 dtex or less. On the other hand, the lower limit of the single yarn fineness of the ultrafine fiber is preferably 0.01 dtex or more, more preferably 0.03 dtex or more, and further preferably 0.1 dtex or more from the viewpoint of abrasion resistance. The total fineness of the ultrafine fibers is 7 dtex or more and 120 dtex or less. When the total fineness is in the above range, the required abrasion resistance can be satisfied, and the thickness of the woven fabric, which is preferable for reducing the outer diameter of the catheter, can be satisfied of 150 μm or less. The total fineness of the ultrafine fibers is preferably 10 dtex or more and 100 dtex or less, and more preferably 30 dtex or more and 80 dtex or less, from the viewpoint of combining the abrasion resistance of the woven fabric, the thinning, and the practical physical properties as a woven fabric for implantable medical devices.
 本実施形態の胸部疾患医療機器用織物の緯糸は、単糸繊度0.5dtex以下、総繊度20dtex以上90dtex以下のポリエステル極細繊維と、単糸繊度0.5dtex超10dtex以下、総繊度20dtex以上90dtex以下のポリエステル繊維とを、目的に応じて1種又は2種以上組み合わせて構成されていてもよく、また、本発明の目的を阻害しない範囲内において、単糸繊度0.5dtex以下、総繊度20dtex以上90dtex以下のポリエステル極細繊維と、単糸繊度0.5dtex超のフッ素樹脂繊維等、ポリエステルと異なる繊維素材とを、目的に応じて1種又は2種以上組み合わせて構成してもよい。組合せの態様としては、目的に応じて前記極細繊維とその他の繊維を撚り合わせて複合繊維としてもよく、交互又はランダムに配置されていても構わない。 The weft of the fabric for chest disease medical equipment of the present embodiment is a polyester ultrafine fiber having a single yarn fineness of 0.5 dtex or less and a total fineness of 20 dtex or more and 90 dtex or less, and a polyester having a single yarn fineness of 0.5 dtex or more and 10 dtex or less and a total fineness of 20 dtex or more and 90 dtex or less. The fiber may be composed of one type or a combination of two or more types depending on the purpose, and within a range that does not impair the object of the present invention, the single yarn fineness is 0.5 dtex or less and the total fineness is 20 dtex or more and 90 dtex or less. One or a combination of two or more kinds of fiber materials different from polyester, such as polyester ultrafine fibers and fluororesin fibers having a single yarn fineness of more than 0.5 dtex, may be used depending on the purpose. As a mode of combination, the ultrafine fibers and other fibers may be twisted to form a composite fiber depending on the purpose, or may be arranged alternately or randomly.
 更に本実施態様の胸部疾患医療機器用織物の極細繊維は、耐摩耗性向上の観点から、撚糸が施されていることが好ましく、撚糸数は50回/m以上が好ましく、より好ましくは100回/m以上、最も好ましくは200回/m以上である。他方、血液漏れ防止の観点から、撚糸数の上限値は800回/m以下が好ましく、より好ましくは600回/m以下、最も好ましくは500回/m以下である。また、緯糸に本発明の別の実施形態である複合糸を用いる場合は、極細繊維、太繊度の繊維を前記撚糸数で撚糸したもの、或いは無撚のものを合撚してもよいが、夫々の撚糸数の合計は50回/m以上800回/以下が好ましい。 Further, from the viewpoint of improving wear resistance, the ultrafine fibers of the woven fabric for chest disease medical equipment of the present embodiment are preferably twisted, and the number of twisted yarns is preferably 50 times / m or more, more preferably 100 times. / M or more, most preferably 200 times / m or more. On the other hand, from the viewpoint of preventing blood leakage, the upper limit of the number of twisted yarns is preferably 800 times / m or less, more preferably 600 times / m or less, and most preferably 500 times / m or less. When a composite yarn according to another embodiment of the present invention is used as the weft, ultrafine fibers, fibers having a high fineness may be twisted by the number of twisted yarns, or untwisted yarns may be twisted together. The total number of twisted yarns is preferably 50 times / m or more and 800 times / less.
 本実施形態の胸部疾患医療機器用織物の極細繊維は、織物から抜き出した糸(分解糸)の引張り強度が3.0cN/dtex以上であり、かつ、引張伸度が12%以上であることが好ましい。極細ポリエステル繊維(分解糸)の引張強度が3.0cN/dtex以上であることで、心臓、または血管等の拍動で生じる金属部材や縫合糸等の部材や生体組織との摩擦による糸切れが抑制され優れた耐摩耗性を発揮することができ、さらには縫合部の破れ等を防止することができる。同様に極細繊維(分解糸)の引張伸度が12%以上であることで、強靭性が向上し、摩擦による糸切れが抑制され優れた耐摩耗性を発揮すると同時に金属部材等との縫合部の破れを防止することができる。 The ultrafine fibers of the woven fabric for chest disease medical equipment of the present embodiment preferably have a tensile strength of 3.0 cN / dtex or more and a tensile elongation of 12% or more of the yarn (decomposed yarn) extracted from the woven fabric. .. When the tensile strength of the ultrafine polyester fiber (decomposed thread) is 3.0 cN / dtex or more, thread breakage due to friction with metal members such as the heart or blood vessels, sutures, and biological tissues is suppressed. Therefore, excellent wear resistance can be exhibited, and further, tearing of the sutured portion can be prevented. Similarly, when the tensile elongation of the ultrafine fiber (decomposed yarn) is 12% or more, the toughness is improved, the yarn breakage due to friction is suppressed, and excellent wear resistance is exhibited, and at the same time, the sutured portion with the metal member or the like is exhibited. Can be prevented from tearing.
[経糸]
 本実施形態の胸部疾患医療機器用織物は、経糸に単糸繊度0.5dtex超10dtex以下、総繊度20dtex以上120dtex以下のポリエステルマルチフィラメント(レギュラー繊維)が配置されている。レギュラー繊維の単糸繊度の下限値が0.5dtex超であり、かつ、総繊度が20dtex以上であることで、緯糸に配置される特定繊度(単糸繊度、総繊度)の極細繊維との相関において、極細繊維が織物表面へ突出することを抑制し、織物の耐摩耗性を向上させることができる。織物の耐摩耗性向上及び破裂強度等の機械特性向上の観点から、レギュラー繊維は単糸繊度1.0dtex以上、総繊度25dtex以上が好ましい。他方、レギュラー繊維の単糸繊度の上限は、緯糸に配置される特定繊度の極細繊維との相関において10dtex以下であることが必要である。レギュラー繊維の単糸繊度が10dtexを超えると、後述する緯糸のクリンプ率が14.0%を超え、極細繊維が織物表面に突出し、耐摩耗性が低下する。
 緯糸である極細繊維の織物表面への突出を抑制するためには、レギュラー繊維の単糸繊度上限は好ましくは8dtex以下であり、6dtex以下がより好ましく、更に好ましくは3dtex以下、最も好ましくは2.5dtex以下である。レギュラー繊維の総繊度の上限も同様に120dtex以下であることで緯糸である極細繊維の織物表面への突出を抑制することができ、さらにデバイスの細径化の目的において好ましい織物の厚みである150μm以下を実現できる。
[Warp]
In the woven fabric for thoracic disease medical equipment of the present embodiment, polyester multifilaments (regular fibers) having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a total fineness of 20 dtex or more and 120 dtex or less are arranged in the warp. When the lower limit of the single yarn fineness of regular fibers is more than 0.5 dtex and the total fineness is 20 dtex or more, the correlation with the ultrafine fibers of the specific fineness (single yarn fineness, total fineness) arranged in the weft is , It is possible to prevent the ultrafine fibers from protruding to the surface of the woven fabric and improve the wear resistance of the woven fabric. From the viewpoint of improving the abrasion resistance of the woven fabric and improving the mechanical properties such as the burst strength, the regular fiber preferably has a single yarn fineness of 1.0 dtex or more and a total fineness of 25 dtex or more. On the other hand, the upper limit of the single yarn fineness of the regular fiber needs to be 10 dtex or less in the correlation with the ultrafine fiber of the specific fineness arranged in the weft. When the single yarn fineness of the regular fiber exceeds 10 dtex, the crimp rate of the weft, which will be described later, exceeds 14.0%, the ultrafine fibers protrude to the surface of the woven fabric, and the abrasion resistance is lowered.
In order to suppress the protrusion of the weft ultrafine fibers to the woven fabric surface, the upper limit of the single yarn fineness of the regular fiber is preferably 8dtex or less, more preferably 6dtex or less, still more preferably 3dtex or less, and most preferably 2.5dtex. It is as follows. Similarly, when the upper limit of the total fineness of regular fibers is 120 dtex or less, it is possible to suppress the protrusion of ultrafine fibers, which are wefts, to the surface of the woven fabric, and the thickness of the woven fabric, which is preferable for the purpose of reducing the diameter of the device, is 150 μm. The following can be realized.
 更に本実施態様の胸部疾患医療機器用織物のレギュラー繊維は、耐摩耗性向上の観点から、撚糸が施されていることが好ましく、撚糸数は100回/m以上が好ましく、より好ましくは200回/m以上、最も好ましくは300回/m以上である。他方、血液漏れ防止の観点から、撚糸数の上限値は1000回/m以下が好ましく、より好ましくは700回/m以下、最も好ましくは800回/m以下である。 Further, the regular fiber of the woven fabric for chest disease medical equipment of the present embodiment is preferably twisted from the viewpoint of improving wear resistance, and the number of twisted yarns is preferably 100 times / m or more, more preferably 200 times. / M or more, most preferably 300 times / m or more. On the other hand, from the viewpoint of preventing blood leakage, the upper limit of the number of twisted yarns is preferably 1000 times / m or less, more preferably 700 times / m or less, and most preferably 800 times / m or less.
[クリンプ率]
 本実施形態の胸部疾患医療機器用織物は、経糸の織縮み(クリンプ)率(JIS L1096 8.7 B法に準拠)が0.2%以上8.0%以下であり、緯糸のクリンプ率が3.0%以上14.0%以下であり、かつ、緯糸のクリンプ率が経糸のクリンプ率よりも大きいことが必要である。経糸のクリンプ率が0.2%以上8.0%以下に制御されていることによって、本発明に特定される極細繊維との相関において、極細繊維の織物表面への突出が抑制され、優れた耐摩耗性を発揮できる。さらには、経糸のクリンプ率が0.2%以上であることで緯糸の糸ズレ(滑脱)を抑制でき、体内に留置した後の拍動下で縫合部での目開きが抑制される。目開きは血液漏れの原因となるとともに、部分的に一方向に押し寄せられた緯糸のクリンプ率アップに影響し、耐摩耗性にマイナスに作用する。極細繊維の織物表面への突出抑制及び緯糸の滑脱防止の観点から、経糸のクリンプ率は、0.3%以上7.5%以下が好ましく、より好ましくは1.0%以上7.0%以下、さらに好ましくは1.0%以上5.0%以下、1.0%以上3.0%以下である。
[Crimp rate]
The textile for chest disease medical equipment of the present embodiment has a warp yarn crimp rate (based on JIS L1096 8.7 B method) of 0.2% or more and 8.0% or less, and a weft yarn crimp rate of 3.0% or more and 14.0% or less. And it is necessary that the crimp rate of the weft is larger than the crimp rate of the warp. By controlling the crimp ratio of the warp to 0.2% or more and 8.0% or less, the protrusion of the ultrafine fibers to the woven fabric surface is suppressed in the correlation with the ultrafine fibers specified in the present invention, and excellent wear resistance is obtained. Can be demonstrated. Furthermore, when the crimp rate of the warp threads is 0.2% or more, the thread displacement (sliding) of the weft threads can be suppressed, and the opening of the stitched portion is suppressed under the pulsation after being placed in the body. The opening causes blood leakage and affects the increase in the crimp rate of the weft thread partially pushed in one direction, which negatively affects the wear resistance. From the viewpoint of suppressing the protrusion of the ultrafine fibers on the woven fabric surface and preventing the weft from slipping, the crimp ratio of the warp is preferably 0.3% or more and 7.5% or less, more preferably 1.0% or more and 7.0% or less, and further preferably 1.0% or more and 5.0. % Or less, 1.0% or more and 3.0% or less.
 本実施形態の胸部疾患医療機器用織物から抜き出した緯糸のクリンプ率は、3.0%以上14.0%以下であり、かつ、緯糸が経糸よりも大きくクリンプしている必要がある。緯糸のクリンプ率が3.0%以上で、かつ、経糸のクリンプ率よりも大きいことで、極細繊維のフィラメントが経糸に押し広げられて極細繊維が織物表面に突出することを抑制し、優れた耐摩耗性を発揮することができるとともに、織物の薄膜化と透水率低下(血液漏れ防止)に好適に作用する。また、緯糸のクリンプ率が14.0%以下であることで、極細繊維が織物表面に突出せず、優れた耐摩耗性を発揮することができる。緯糸のクリンプ率は、耐摩耗性と織物特性(薄膜化と透水率)との観点から、3.5%以上13.5%以下が好ましく、より好ましくは4.0%以上13.0%以下であり、さらに好ましくは7.0%以上13.0%以下である。 The crimp rate of the weft thread extracted from the woven fabric for chest disease medical equipment of the present embodiment must be 3.0% or more and 14.0% or less, and the weft thread must be crimped larger than the warp thread. When the crimp rate of the weft is 3.0% or more and is larger than the crimp rate of the warp, the filaments of the ultrafine fibers are prevented from being spread by the warp and the ultrafine fibers are prevented from protruding to the surface of the woven fabric, resulting in excellent abrasion resistance. In addition to being able to exhibit its properties, it works suitably for thinning the woven fabric and reducing the water permeability (preventing blood leakage). Further, when the crimp ratio of the weft is 14.0% or less, the ultrafine fibers do not protrude on the surface of the woven fabric, and excellent abrasion resistance can be exhibited. The crimp ratio of the weft is preferably 3.5% or more and 13.5% or less, more preferably 4.0% or more and 13.0% or less, and further preferably 7.0% from the viewpoint of abrasion resistance and woven fabric properties (thin film and water permeability). More than 13.0% or less.
 本実施形態の織物は、緯糸及び経糸が適度にクリンプした状態にコントロールされているので、金属部材との縫合部の経糸方向、緯糸方向の目開きが抑制され、患部留置時の血液漏れが起こりにくいという観点からも好適である。 Since the woven fabric of the present embodiment is controlled so that the weft and the warp are appropriately crimped, the opening in the warp direction and the weft direction of the sutured portion with the metal member is suppressed, and blood leakage occurs when the affected part is placed. It is also suitable from the viewpoint of difficulty.
[糸重なり率]
 本実施形態の胸部疾患医療機器用織物は、隣り合う緯糸同士の重なり率が0.90以上であることが好ましい。単糸繊度0.5dtex以下の極細繊維を含む緯糸の重なり率が0.90以上であることで透水率を低く抑制し、優れた防血液漏れ性を獲得することができる。ここで、緯糸重なり率とは、図1に示すように、経糸方向10mm以上、緯糸方向20mm以上で任意に切り取った織物を、X線CTで経糸の表面と裏面を通る隣り合う緯糸の重なり部の数が50個以下になる倍率で任意の箇所2点以上を撮影し、下記式(1)で算出される緯糸重なり部20個以上の緯糸重なり率の平均値である。織物としてより薄く、より優れた防血液漏れ性、縫合糸で結節された時の耐目開き性を獲得する観点から、緯糸重なり率は0.95以上がより好ましい。
Figure JPOXMLDOC01-appb-M000001

 尚、図1中、緯糸重なり率a’は、同様に、=(b’ + b”) / c’で算出される。
[Thread overlap rate]
In the woven fabric for thoracic disease medical equipment of the present embodiment, the overlapping rate between adjacent weft threads is preferably 0.90 or more. When the overlap rate of the weft yarn containing the ultrafine fiber having a single yarn fineness of 0.5 dtex or less is 0.90 or more, the water permeability can be suppressed low and excellent blood leakage prevention property can be obtained. Here, as shown in FIG. 1, the weft overlap ratio is an overlapping portion of adjacent wefts passing through the front surface and the back surface of the warp by X-ray CT of a woven fabric arbitrarily cut in the warp direction of 10 mm or more and the weft direction of 20 mm or more. It is the average value of the weft overlap rate of 20 or more weft overlapping portions calculated by the following formula (1) by photographing 2 or more points at arbitrary points at a magnification of 50 or less. The weft overlap rate is more preferably 0.95 or more from the viewpoint of obtaining a thinner woven fabric, better blood leakage resistance, and opening resistance when knotted with sutures.
Figure JPOXMLDOC01-appb-M000001

In FIG. 1, the weft overlap ratio a'is similarly calculated by = (b'+ b ") / c'.
 また、前記緯糸重なり率のCV値は0.1以下であることが好ましい。ここで緯糸重なり率のCV値は、下記式(2)で算出される。緯糸重なり率のCV値が0.1超、すなわち緯糸重なり率のバラつきが大きいと、たとえ緯糸重なり率の平均値が0.90以上であっても、緯糸重なり率0.90未満の部分が多く存在することにより、その部分は緯糸が経糸によって押しつぶされず楕円状の形状となり直接摩耗部と接触するので、優先的に擦られ孔が開いてしまう。緯糸重なり率のCV値が0.1以下であることで織物表面において緯糸が均一に平らに押しつぶされて優れた耐摩耗性を発揮する。緯糸重なり率のCV値は0.09以下がより好ましく、最も好ましくは0.08以下である。
Figure JPOXMLDOC01-appb-M000002
Further, the CV value of the weft overlap ratio is preferably 0.1 or less. Here, the CV value of the weft overlap rate is calculated by the following equation (2). If the CV value of the weft overlap rate is more than 0.1, that is, the variation of the weft overlap rate is large, even if the average value of the weft overlap rate is 0.90 or more, there are many parts where the weft overlap rate is less than 0.90. Since the weft is not crushed by the warp and becomes an elliptical shape in the portion and comes into direct contact with the worn part, it is preferentially rubbed and a hole is opened. When the CV value of the weft overlap ratio is 0.1 or less, the weft is crushed uniformly and evenly on the surface of the woven fabric, and excellent abrasion resistance is exhibited. The CV value of the weft overlap rate is more preferably 0.09 or less, and most preferably 0.08 or less.
Figure JPOXMLDOC01-appb-M000002
 本実施形態の胸部疾患医療機器用織物は、隣り合う経糸同士の重なり率が0.90未満であることが好ましい。前述の通り胸部疾患治療用医療機器に用いられる織物は高い防血液漏れ性を有している必要があり、その目的を達成するために、経糸、緯糸ともに高密度に織り上げる、すなわち隣り合う経糸同士・緯糸同士をより近接させる、重なり率を高く設定するというのが一般的な考え方であり、特許文献1にも経糸重なり率は0.90以上が好ましい旨記載されている。しかしながら、耐摩耗性改善の観点では、この考え方は逆方向である。すなわち、経糸重なり率が0.90以上であると緯糸が経糸間に入りにくくなるため、緯糸のクリンプ率が14%を超える傾向がより強くなる。すなわち、緯糸のクリンプ率を14%以下に制御しやすいという観点から経糸重なり率は0.90未満が好ましい。他方、低透水性を維持する観点から経糸重なり率の下限は0.60以上が好ましく、より好ましくは0.70以上である。 In the woven fabric for chest disease medical equipment of the present embodiment, it is preferable that the overlapping rate of adjacent warp threads is less than 0.90. As mentioned above, the fabric used for medical equipment for treating chest diseases needs to have high blood-proof leakage property, and in order to achieve that purpose, both warp and weft are woven at high density, that is, adjacent warp threads are woven together. -It is a general idea to bring the wefts closer to each other and set a high overlap rate, and Patent Document 1 also states that the warp overlap rate is preferably 0.90 or more. However, from the viewpoint of improving wear resistance, this idea is in the opposite direction. That is, when the warp overlap rate is 0.90 or more, it becomes difficult for the weft to enter between the warp, so that the crimp rate of the weft tends to exceed 14%. That is, the warp overlap rate is preferably less than 0.90 from the viewpoint that the crimp rate of the weft can be easily controlled to 14% or less. On the other hand, from the viewpoint of maintaining low water permeability, the lower limit of the warp overlap rate is preferably 0.60 or more, more preferably 0.70 or more.
 また、前記経糸重なり率のCV値は0.10以下であることが好ましい。経糸重なり率のCV値が0.10超、すなわち経糸重なり率のバラつきが大きい場合、経糸重なり率が0.90を超える部分、また、経糸重なり率が0.60未満になるような部分が存在し、前者では部分的な耐摩耗性悪化につながり、後者では透水性の部分的悪化につながる場合がある。前者の耐摩耗性の悪化は、たとえ部分的であってもそこから孔が拡大することが懸念される。より好ましい経糸重なり率のCV値は0.09以下、最も好ましくは0.08以下である。 Further, the CV value of the warp overlap rate is preferably 0.10 or less. When the CV value of the warp overlap rate exceeds 0.10, that is, when the variation in the warp overlap rate is large, there is a part where the warp overlap rate exceeds 0.90 and a part where the warp overlap rate is less than 0.60. Abrasion resistance may be deteriorated, and the latter may lead to partial deterioration of water permeability. There is concern that the former deterioration of wear resistance will cause holes to expand from there, even if only partially. The CV value of the more preferable warp overlap ratio is 0.09 or less, and most preferably 0.08 or less.
 また、本発明の他の実施形態の織物は、単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントと、単糸繊度0.5dtex以下のポリエステルマルチフィラメントとの複合糸であって、総繊度20dtex以上120dtex以下である該複合糸が経糸及び/又は緯糸に配されている織物である。極細ポリエステル繊維に太繊度のポリエステル繊維が配合されていることで耐摩耗性は向上するが、他の実施形態の特徴は、例えば、単糸繊度5dtexを超える極太の繊維が配向されているにも拘らず織物の厚みが、単糸繊度1~2dtex程度の一般的なレギュラー繊維を経緯に配した織物よりも格段に薄いことにある。更に複合糸を用いた他の実施形態の特徴は、太い繊維が配合されていても高い防血液漏れ性(優れた低透水性)を発揮することである。これらの特徴をより効率的かつ安定に発現させるためには、経糸重なり率、緯糸重なり率、またそれぞれのCV値を前記好ましい範囲に制御することが推奨される。例えば、緯糸に複合糸を用いた場合、経糸重なり率が0.90以上では、太繊度の繊維が配合された緯糸は扁平に押しつぶされず、著しく厚みが増大し、当然透水率も著しく悪化し、目安である400cc/cm2/minを超える場合がある。また、前記複合糸は極細繊維と太繊維を撚り合せる(撚糸)、インターレース等で交絡させることで得られる他、仮撚り加工やカバリング等の方法で得られる。例えば、撚糸の場合、透水性を維持するために、撚糸数50以上800回/m以下であることが好ましい。 Further, the woven fabric of another embodiment of the present invention is a composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less, and has a total fineness of 20 dtex or more and 120 dtex. The following composite yarn is a woven fabric in which the warp yarn and / or the weft yarn are arranged. Abrasion resistance is improved by blending the extra-fine polyester fiber with the thick polyester fiber, but another feature of the embodiment is that, for example, the extra-thick fiber having a single yarn fineness of more than 5 dtex is oriented. Regardless, the thickness of the woven fabric is much thinner than that of a woven fabric in which general regular fibers with a single yarn fineness of about 1 to 2 dtex are arranged in the warp and weft. Further, a feature of another embodiment using the composite yarn is that it exhibits high blood-proof leakage property (excellent low water permeability) even when thick fibers are blended. In order to express these characteristics more efficiently and stably, it is recommended to control the warp yarn overlap ratio, the weft yarn overlap ratio, and the respective CV values within the above-mentioned preferable ranges. For example, when a composite yarn is used for the weft, when the warp overlap ratio is 0.90 or more, the weft containing the fibers having a high fineness is not crushed flatly, the thickness increases remarkably, and naturally the water permeability also deteriorates remarkably. It may exceed a certain 400cc / cm 2 / min. Further, the composite yarn can be obtained by twisting ultrafine fibers and thick fibers (twisted yarn), entwining them by interlacing or the like, or by a method such as false twisting or covering. For example, in the case of twisted yarn, the number of twisted yarns is preferably 50 or more and 800 times / m or less in order to maintain water permeability.
 前記複合糸の、単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントの配合比率は15~65重量%が好ましい。太繊度の繊維の配合比率が15~65重量%であることで、緯糸に極細繊維のみが使用された織物と比較して耐摩耗性能が著しく向上すると同時に透水性を400cc/cm2/min以下に抑制することができる。 The blending ratio of the polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less in the composite yarn is preferably 15 to 65% by weight. By blending 15 to 65% by weight of fibers with high fineness, wear resistance is significantly improved compared to woven fabrics that use only ultrafine fibers for weft, and water permeability is 400 cc / cm 2 / min or less. Can be suppressed.
 本実施形態の織物を構成するポリエステル繊維としては、特に限定するものではないが、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリシクロヘキサンテレフタレート等の芳香族ポリエステルが挙げられ、最も好ましくはポリエチレンテレフタレートである。また、PTFEやETFE等 のフッ素樹脂繊維やポリアミド繊維、ポリオレフィン繊維等を所望の効果が奏される限り部分的に使用しても構わない。また、本実施形態の織物に、予後観察を目的に外部からのモニタリング機能を持たせるために金属繊維やカーボン等を含む導電性繊維を部分的に使用することも、好ましい実施態様である。 The polyester fiber constituting the woven fabric of the present embodiment is not particularly limited, and examples thereof include aromatic polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polycyclohexane terephthalate, and polyethylene terephthalate is most preferable. Further, fluororesin fibers such as PTFE and ETFE, polyamide fibers, polyolefin fibers and the like may be partially used as long as the desired effect is obtained. It is also a preferred embodiment that the woven fabric of the present embodiment partially uses conductive fibers containing metal fibers, carbon and the like in order to provide an external monitoring function for the purpose of prognosis observation.
 本実施形態の胸部疾患医療機器用織物の織物構造としては、平織、綾織、朱子織、梨地織等があり、特に限定するものではないが、織物を構成する緯糸、経糸のクリンプ率を本発明の範囲に制御する観点から、平織構造や綾織構造が好ましい。さらに引裂き強力や引張強度向上等の観点からは、リップストップ組織を有することも可能である。 The woven fabric structure of the woven fabric for chest disease medical equipment of the present embodiment includes plain weave, twill weave, satin weave, satin weave and the like, and the crimp ratio of the weft and warp yarns constituting the woven fabric is not particularly limited. A plain weave structure or a twill weave structure is preferable from the viewpoint of controlling the range. Further, from the viewpoint of tear strength and improvement of tensile strength, it is possible to have a ripstop structure.
 本実施形態の胸部疾患医療機器用織物は、好ましくは、経糸のカバーファクター(CFw)と緯糸のカバーファクター(CFf)の和はCFw+CFf=1500以上であり、より好ましくはCFw+CFf=1700以上である。CFwとCFfの和を1500以上とすることで、隣接する緯糸-緯糸間及び/又は経糸-経糸間の隙間が減ることで、連続摩耗時(例えば、拍動)の経糸/緯糸間の糸ズレが生じにくくなり、経糸/緯糸間の摩擦を防ぐことができる。 In the woven fabric for a chest disease medical device of the present embodiment, the sum of the warp cover factor (CFw) and the weft cover factor (CFf) is preferably CFw + CFf = 1500 or more, and more preferably CFw + CFf = 1700. That is all. By setting the sum of CFw and CFf to 1500 or more, the gap between adjacent wefts and / or warp-warp is reduced, and the warp / weft misalignment during continuous wear (for example, pulsation). Is less likely to occur, and friction between the warp and weft can be prevented.
 本実施形態の胸部疾患医療機器用織物としては、シート状の織物を筒状に縫い合せた形態であることも可能であるが、縫い合せ部分の厚みが増し、細く織物を折り畳む際に支障を来すおそれがある。したがって、本実施形態の胸部疾患医療機器用織物は、植込み型医療機器の細径化実現及び血液漏れ防止の観点から筒状のシームレス織物(織物)の形態にあることが好ましい。更に本実施形態の植込み型医療機器用の筒状織物は、径変化のないストレート形状、径変化のあるテーパー形状であってもよく、また、テーパー部を一部に含む形状、さらには分岐形状であっても、複数の枝付き形状であってもよく、特に限定されない。 The woven fabric for chest disease medical equipment of the present embodiment may be a woven fabric in which sheet-shaped woven fabrics are sewn into a tubular shape, but the thickness of the sewn portion increases, which hinders the folding of the woven fabric into thin pieces. There is a risk of coming. Therefore, the woven fabric for a chest disease medical device of the present embodiment is preferably in the form of a tubular seamless woven fabric (woven fabric) from the viewpoint of realizing a smaller diameter of the implantable medical device and preventing blood leakage. Further, the tubular woven fabric for the implantable medical device of the present embodiment may have a straight shape with no diameter change, a tapered shape with a diameter change, a shape including a tapered portion as a part, and a branched shape. However, the shape may be a plurality of branches, and is not particularly limited.
 本実施形態の胸部疾患医療機器用織物の厚みは、使用される部位に応じて使用する繊維の総繊度・単糸繊度、また織密度、織組織で適宜設計すれば足り、特に限定されるものではないが、植込み型医療機器の細径化の観点から、ステントグラフトの主要部材である人工血管として使用する場合は10μm以上150μm以下が好ましく、更に好ましくは15μm以上130μm以下である。ここで、織物の厚みは、織物の周方向、長さ方向で任意に選択された10箇所の織物の厚みを、厚みゲージを用いて測定した値の平均値で定義される。 The thickness of the woven fabric for chest disease medical equipment of the present embodiment is particularly limited as long as it is appropriately designed according to the total fineness and single yarn fineness of the fibers used, the weaving density, and the weaving structure according to the site to be used. However, from the viewpoint of reducing the diameter of the implantable medical device, when it is used as an artificial blood vessel which is a main member of a stent graft, it is preferably 10 μm or more and 150 μm or less, and more preferably 15 μm or more and 130 μm or less. Here, the thickness of the woven fabric is defined by the average value of the values measured by using the thickness gauge at 10 woven fabrics arbitrarily selected in the circumferential direction and the length direction of the woven fabric.
 本実施形態の胸部疾患医療機器用織物は、JIS L 1096 8.19.5 E法に準拠するマーチンデール摩耗試験機を用いた摩耗回数5000回の摩耗試験後のANSI/AAMI/ISO7198:1998/2001基準の破裂強度試験に従って計測される破裂強度が140N以上であることが好ましく、より好ましくは150N以上である。また、前記摩耗試験における破裂強度の保持率(%)、すなわち、{(摩耗試験後の破裂強度)/(摩耗試験前の破裂強度)}×100は、65%以上であることが好ましく、より好ましくは75%以上である。 The woven fabric for chest disease medical equipment of this embodiment is based on ANSI / AAMI / ISO 7198: 1998/2001 after a wear test of 5000 times using a Martindale wear tester conforming to JIS L 1096 8.19.5 E method. The burst strength measured according to the burst strength test is preferably 140 N or more, more preferably 150 N or more. Further, the retention rate (%) of the burst strength in the wear test, that is, {(burst strength after the wear test) / (burst strength before the wear test)} × 100 is preferably 65% or more, more preferably. It is preferably 75% or more.
 本実施形態の胸部疾患医療機器用織物では、ANSI/AAMI/ISO 7198:1998/2001に準拠した織物の透水性が400cc/cm2/min以下であることが好ましい。織物の透水性は血液漏れ防止の指標となり、透水性が400cc/cm2/min以下であることで、織物壁面からの血液漏れを抑えられる。実用性能の観点から、本実施形態の胸部疾患医療機器用織物の透水性は、より好ましくは300cc/cm2/min以下、さらに250cc/cm2/min以下、最も好ましくは200cc/cm2/minである。 In the woven fabric for chest disease medical devices of the present embodiment, the water permeability of the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 is preferably 400 cc / cm 2 / min or less. The water permeability of the woven fabric is an index for preventing blood leakage, and when the water permeability is 400 cc / cm 2 / min or less, blood leakage from the wall surface of the woven fabric can be suppressed. From the viewpoint of practical performance, the water permeability of the woven fabric for chest disease medical devices of the present embodiment is more preferably 300 cc / cm 2 / min or less, further 250 cc / cm 2 / min or less, and most preferably 200 cc / cm 2 / min. Is.
 本実施形態の胸部疾患医療機器用織物は、金属部材やその他組み合わせる部材の形状に合わせて端部をカットしたり、側面に孔を開けたりしてもよい。カット部や孔の周囲は、繊維がほぐれたり、織物が裂けたりしないように縫製や熱溶融などで処理されていることが好ましい。孔を開ける場合、孔の数や直径は、ステント織物を取り付ける箇所の周辺にある血管の数や直径に応じて適宜設計することで足りる。孔の形は限定されないものの、円形、長円形、三角形、正方形、多角形、又はランダム形状が挙げられる。また、本実施形態の胸部疾患医療機器用織物は、透過マーカーを取り付けてもよい。 The woven fabric for a chest disease medical device of the present embodiment may have its end cut or a hole may be formed on the side surface according to the shape of a metal member or other members to be combined. It is preferable that the cut portion and the periphery of the hole are treated by sewing or heat melting so that the fiber is not loosened or the woven fabric is not torn. When making holes, it is sufficient to appropriately design the number and diameter of the holes according to the number and diameter of blood vessels around the site where the stent fabric is attached. The shape of the hole is not limited, but may be circular, oval, triangular, square, polygonal, or random. Further, the woven fabric for a medical device for chest disease of the present embodiment may be attached with a transmission marker.
 本実施形態の胸部疾患医療機器用織物は、所望の厚みや外径等の要件を逸脱しない範囲内で抗血栓材料、コラーゲン、ゼラチン、ヘパリン、アセチルサリチル酸、ポリウレタン等でコーティングされていてもよい。
 本実施形態の胸部疾患医療機器用織物は、本発明の目的を損なわない範囲でカレンダー等のプレス処理やクリンプ加工することもできる。
The woven fabric for a chest disease medical device of the present embodiment may be coated with an antithrombotic material, collagen, gelatin, heparin, acetylsalicylic acid, polyurethane or the like within a range that does not deviate from requirements such as a desired thickness and outer diameter.
The woven fabric for a medical device for chest disease of the present embodiment can also be pressed or crimped with a calendar or the like as long as the object of the present invention is not impaired.
 本発明の他の実施形態は、医療機器の構成部材として前記した織物が用いられた心臓、血管系疾患の治療に用いられる医療機器用デバイスである。対象機器としては特に限定されるものではないが、胸部大動脈や大動脈解離の治療に用いられるステントグラフト、大動脈弁狭窄症の治療に用いられる経カテーテル大動脈弁置換術用デバイス等が挙げられる。なお、腹部大動脈、腸骨動脈にできた動脈瘤の治療用の部材として使用することを否定するものではない。構成部材である織物とステントや金属フレーム等の金属部材が縫合糸で結束・固定されている前記医療機器は、心臓や動脈等の留置部では強い血流と定常的な拍動に晒され、縫合部位においては金属との摩擦、留置部においては生体組織との摩擦、さらに血液流体との摩擦が生じるが、本発明の織物は前述した設計により定常的な固体、液体との摩擦による摩耗が抑制される。 Another embodiment of the present invention is a device for a medical device used for treating a heart or vascular disease in which the above-mentioned fabric is used as a component of the medical device. The target device is not particularly limited, and examples thereof include a stent graft used for treating thoracic aorta and aortic dissection, and a transcatheter aortic valve replacement device used for treating aortic stenosis. It should be noted that it is not denied that it is used as a member for treating aneurysms formed in the abdominal aorta and the iliac artery. The medical device in which the constituent members such as a woven fabric and a metal member such as a stent or a metal frame are bound and fixed with sutures is exposed to strong blood flow and constant pulsation in an indwelling part such as a heart or an artery. Friction with metal occurs at the sutured part, friction with living tissue at the indwelling part, and friction with blood fluid. However, the woven fabric of the present invention is constantly worn by friction with solid and liquid due to the above-mentioned design. It is suppressed.
 以下、本実施形態の胸部疾患医療機器用織物の製造方法について説明するが、本発明は、これらの方法に制限されることを意図されない。
 また、例として、本実施形態の織物の製造に使用する繊維原料として、ポリエチレンテレフタレート(PET)を挙げるが、この材料に限定されない。極細繊維及び太繊度の繊維(レギュラー繊維)の製造には、溶融紡糸し、引き続く延伸によって所定の単糸繊度、総繊度の極細繊維及びレギュラー繊維を製造する、いわゆる直接溶融紡糸法を採用することが好ましい。極細繊維及びレギュラー繊維は、耐摩耗性と低透水性をコントロールする観点から、それぞれ所定の回数で撚糸することが好ましいことは前述のとおりであるが、優れた工程通過性(製織時の糸切れや毛羽立ち抑制)の観点からも、撚糸を施し収束性を付与することが好ましい。撚糸の方法としては、公知又は慣用の撚糸方法を利用することができ、例えば、リング撚糸機、ダブルツイスター、イタリー式撚糸機、カバリング機、仮撚機など公知の撚糸機が挙げられる。撚糸の形態としては、フィラメントを1本又は2本以上引き揃えて、S又はZ方向に加撚した片撚り糸であってもよいし、このような片撚り糸を2本以上引き揃えてさらに上撚りをかけた諸撚り糸であってもよい。緯糸に用いる極細繊維の撚数は50回/m以上800回/m以下であることが好ましい。50回/m以上の撚数とすることで、平滑性を向上させ、引張りや曲げ等の応力を均一にフィラメントへかかるようにして、製織時の毛羽や糸切れの問題を減らし、工程安定性の向上に繋がる。800回/m以下の撚糸を施すことで、織物上の経糸、緯糸は扁平になりやすく、隣接する緯糸-緯糸間及び/又は経糸-経糸間の隙間が減り、耐摩耗性や透水性を低くすることができる。また、経糸に用いるレギュラー繊維の撚数は、製織工程での経糸同士の擦れを抑制する観点から100回/m以上が好ましく、200回/m以上がより好ましい。
Hereinafter, a method for producing a woven fabric for a medical device for chest disease according to the present embodiment will be described, but the present invention is not intended to be limited to these methods.
Further, as an example, polyethylene terephthalate (PET) is mentioned as a fiber raw material used for producing the woven fabric of the present embodiment, but the material is not limited to this material. For the production of ultrafine fibers and fibers with high fineness (regular fibers), a so-called direct melt spinning method is adopted in which ultrafine fibers and regular fibers having a predetermined single yarn fineness and total fineness are produced by melt spinning and subsequent drawing. Is preferable. As described above, it is preferable to twist the ultrafine fibers and regular fibers at a predetermined number of times from the viewpoint of controlling wear resistance and low water permeability, but they have excellent process passability (thread breakage during weaving). From the viewpoint of suppressing fluffing and fluffing), it is preferable to apply plying to impart convergence. As a method of twisting, a known or conventional twisting method can be used, and examples thereof include known twisting machines such as a ring twisting machine, a double twister, an Italian twisting machine, a covering machine, and a false twisting machine. The form of the twisted yarn may be a single-twisted yarn in which one or two or more filaments are aligned and twisted in the S or Z direction, or two or more such single-twisted yarns are aligned and further twisted upward. It may be a twisted yarn overlaid with. The number of twists of the ultrafine fibers used for the weft is preferably 50 times / m or more and 800 times / m or less. By setting the number of twists to 50 times / m or more, smoothness is improved, stresses such as tension and bending are uniformly applied to the filament, problems of fluff and yarn breakage during weaving are reduced, and process stability. It leads to the improvement of. By applying plying of 800 times / m or less, the warp and weft on the woven fabric tend to be flattened, the gap between the adjacent weft and / or warp and warp is reduced, and the abrasion resistance and water permeability are lowered. can do. The number of twists of the regular fibers used for the warp yarns is preferably 100 times / m or more, more preferably 200 times / m or more, from the viewpoint of suppressing rubbing between the warp yarns in the weaving process.
 他方、本発明の別の実施態様である極細繊維と太繊度の複合糸を製造する方法としては、撚糸、仮撚り、インターレースによる交絡、カバリング等があるが特にこれらに限定するものではない。例えば、極細繊維およびレギュラー繊維を互いにより合わせる、所謂合撚する場合、前述の方法及び機械が挙げられる。インターレースで交絡を付与する場合、使用する繊維の太さによって、特に極細繊維が毛羽立たない範囲で、100個/m以下の交絡が付与されるように制御すれば足りるが、エアー圧としては好ましくは0.01MPa~0.10Mpaである。また、交絡させる糸に張力差をつけることで、糸鞘芯構造の配置を任意にコントロールすることができる。例えば、張力が緩い方が鞘側、張力が高い糸が芯側に配置とすることができる。混ぜる糸の本数や鞘芯構造の配置は目的に応じて任意に設定すればよい。 On the other hand, as another method of producing a composite yarn of ultrafine fibers and high fineness, which is another embodiment of the present invention, there are twisted yarns, false twists, entanglement by interlacing, covering and the like, but the method is not particularly limited thereto. For example, in the case of twisting ultrafine fibers and regular fibers with each other, so-called twisting, the above-mentioned methods and machines can be mentioned. When confounding is applied by interlacing, it is sufficient to control so that entanglement of 100 fibers / m or less is applied depending on the thickness of the fibers used, especially within the range where the ultrafine fibers do not fluff, but the air pressure is preferable. It is 0.01MPa to 0.10Mpa. Further, by giving a tension difference to the threads to be entangled, the arrangement of the thread sheath core structure can be arbitrarily controlled. For example, the looser tension can be arranged on the sheath side, and the higher tension yarn can be arranged on the core side. The number of threads to be mixed and the arrangement of the sheath core structure may be arbitrarily set according to the purpose.
 次に、仮撚り加工で複合糸を製造する場合、繊度の異なる複数本の糸を同時に引き出して、複数の糸を同時に仮撚りして混ぜてもよく、複数本の内、任意の本数を仮撚り加工したのち、巻き取り部までの間にて前記インターレース加工にてエアー圧を利用してより均一の混合させる方法をとっても構わない。インターレースを行う箇所は仮撚り部の後に限らず、前でもよく任意の目的に応じて実施すればよい。 Next, when a composite yarn is manufactured by false twisting, a plurality of yarns having different fineness may be pulled out at the same time, and the plurality of yarns may be falsely twisted and mixed at the same time. After the twisting process, a method of more uniform mixing using air pressure in the interlacing process up to the winding portion may be adopted. The place where the interlacing is performed is not limited to after the false twisted portion, but may be before, and may be performed according to an arbitrary purpose.
 カバリングにて糸を混ぜる場合は、鞘芯構造となり、鞘側はダブルカバリング機や予め撚糸やインターレースで混ぜた糸を準備することで、複数の糸を配置することができる。糸の配置は目的に応じて任意に選択すればよい。 When mixing yarns by covering, it has a sheath core structure, and multiple yarns can be arranged on the sheath side by preparing a double covering machine or yarns mixed in advance by twisting or interlacing. The arrangement of the threads may be arbitrarily selected according to the purpose.
 以上の製造方法により得られた繊維を用いて筒状のシームレス織物を製造することができる。筒状シームレス織物を製造するための織機は、特に限定されるものではないが、杼(シャトル)の往復運動によって緯糸を通すシャトル織機を用いることが織物の耳部(織物の折り返し部分)の織密度低下を抑制し、織物の厚みを均一化する観点から好ましい。
 本実施形態の胸部疾患医療機器用織物を製織する場合、経糸の上げ下げの制御が必要であり、そのための装置としては、ジャガード式開口装置やドビー式開口装置等を用いることができる。
A tubular seamless woven fabric can be manufactured using the fibers obtained by the above manufacturing method. The loom for producing the tubular seamless woven fabric is not particularly limited, but it is possible to use a shuttle loom through which the weft is passed by the reciprocating motion of the shuttle to weave the ears of the woven fabric (folded part of the woven fabric). It is preferable from the viewpoint of suppressing the decrease in density and making the thickness of the woven fabric uniform.
When weaving a woven fabric for a medical device for chest disease of the present embodiment, it is necessary to control the raising and lowering of the warp threads, and as a device for that purpose, a jacquard type opening device, a dobby type opening device, or the like can be used.
 経糸のクリンプ率を0.2%以上8.0%以下、緯糸のクリンプ率を3.0%以上14.0%以下にコントロールする手段に特に制限はないが、例えば、緯糸の重なり率が0.9以上、経糸の重なり率が0.9未満になるように緯糸や経糸の織密度(CF)や緯糸の撚糸数を適宜設計することや、製織時の経糸張力及び緯糸のシャトルからの引き出し張力の調整、経糸及び/又は緯糸の熱収縮率と製織後の熱セット、精練等の後処理条件調整の何れか、あるいはそれら条件を適宜組み合わせる等の方法が挙げられる。例えば、製織時の経糸張力で調整する場合、経糸張力の調整範囲を0.5~1.5g/dtexにすることが好ましく、より好ましくは0.6~1.3g/dtex、さらに好ましくは0.7~1.2g/dtexである。経糸張力を前記範囲にコントロールすることで、緯糸の打ちこみ時、打ち込み性が向上し、緯糸を目的のクリンプ率に制御することができる。 There are no particular restrictions on the means of controlling the crimp rate of the warp threads to 0.2% or more and 8.0% or less, and the crimp rate of the weft threads to 3.0% or more and 14.0% or less. The weaving density (CF) of the weft and the warp and the number of twists of the weft are appropriately designed so as to be less than, the warp tension at the time of weaving and the pull-out tension of the weft from the shuttle are adjusted, and the warp and / or the weft is heat-shrinked. Any of the rate and heat setting after weaving, post-treatment condition adjustment such as refining, or a method of appropriately combining these conditions can be mentioned. For example, when adjusting the warp tension during weaving, the adjustment range of the warp tension is preferably 0.5 to 1.5 g / dtex, more preferably 0.6 to 1.3 g / dtex, and further preferably 0.7 to 1.2 g / dtex. is there. By controlling the warp tension within the above range, the driving performance is improved when the weft is driven, and the weft can be controlled to the desired crimp rate.
 緯糸の引き出し張力は、製織後の周方向の織縮みによる緯糸のクリンプ率アップを抑制する観点から、0.1g/dtex以上0.5g/dtex以下であることが好ましい。緯糸張力が0.1g/dtex未満の場合、経糸による緯糸潰れが起きにくく、クリンプ率が高くなる傾向にあり、緯糸打ち込み時に糸が緩むので連続的かつ安定品質で製織が困難となる。また、緯糸引き出し張力が0.5g/dtexを超えても同様に緯糸のクリンプ率が高くなる傾向にある。これは、製織後の織縮によるものである。緯糸打ち込み時の張力は、織物全体の経糸、緯糸のクリンプ率の均一性の観点から、0.2g/dtex以上0.4g/dtex以下であることがより好ましい。製織に用いる緯糸銘柄、経糸銘柄によって前記範囲内で経糸張力及び緯糸張力をコントロールして経糸及び緯糸のクリンプ率を制御することができる。 The pull-out tension of the weft is preferably 0.1 g / dtex or more and 0.5 g / dtex or less from the viewpoint of suppressing an increase in the crimp rate of the weft due to weaving shrinkage in the circumferential direction after weaving. When the weft tension is less than 0.1 g / dtex, the weft is less likely to be crushed by the warp and the crimp rate tends to be high, and the yarn loosens when the weft is driven, which makes weaving with continuous and stable quality difficult. Further, even if the weft pull-out tension exceeds 0.5 g / dtex, the crimp rate of the weft tends to increase as well. This is due to weaving shrinkage after weaving. The tension at the time of driving the weft is more preferably 0.2 g / dtex or more and 0.4 g / dtex or less from the viewpoint of the uniformity of the crimp ratio of the warp and the weft of the entire fabric. Depending on the weft brand and the warp brand used for weaving, the warp tension and the weft tension can be controlled within the above range to control the crimp rate of the warp and the weft.
 また、製織後は、形態安定性を目的とした熱セット、油剤等の除去を目的とした精練処理等の後処理を行うが、熱セット条件は、定張、150~200℃で10~30分間、また、精練条件60~90℃で10~150分間の範囲内で、緯糸銘柄、経糸銘柄、及び製織条件に応じて適宜変更して経糸及び緯糸のクリンプ率を制御することができる。 In addition, after weaving, post-treatment such as heat setting for morphological stability and refining treatment for removal of oils and the like is performed, but the heat setting conditions are constant tension, 10 to 30 at 150 to 200 ° C. The crimp rate of the warp and the weft can be controlled by appropriately changing the weft brand, the warp brand, and the weaving condition within the range of 10 to 150 minutes at the refining condition of 60 to 90 ° C. for 1 minute.
 すなわち、緯糸クリンプ率は、単糸繊度/総繊度、経糸重なり率、複合糸の太繊度配合比率、及び製造条件として、緯糸引出張力、経糸張力を調整することにより、緯糸重なり率は、CF(特に緯糸密度)、緯糸撚糸数、経糸重なり率、及び製造条件として、緯糸引出張力、経糸張力を調整することにより、緯糸重なり率CV値は、緯糸撚糸数、複合糸の太繊度配合比率、複合糸の製造方法(合撚条件)、及び経糸重なり率を調整することにより、経糸クリンプ率は、製造条件(経糸張力、緯糸引出張力)を調整することにより、経糸重なり率は、CF(特に経糸密度)を調整することにより、そして、経糸重なり率CV値は、経糸張力バランス(筬の通し本数)、製造条件(緯糸引出張力)、及び経糸撚糸数を調整することにより、それぞれ、コントロールすることができる。これらの各調節因子を最適化することで、本実施形態の胸部疾患医療機器用織物は、極細繊維を用いながら、耐摩耗性を向上させることができるという作用効果を奏することができるものとなる。 That is, the weft crimp ratio is determined by adjusting the single yarn fineness / total fineness, the warp overlap ratio, the thick fineness blending ratio of the composite yarn, and the weft pull-out tension and the warp tension as the manufacturing conditions, so that the weft overlap ratio is CF ( In particular, weft density), number of weft twists, warp overlap ratio, and weft pull-out tension and warp tension are adjusted as manufacturing conditions, and the weft overlap ratio CV value is determined by the number of weft twists, the composition ratio of the thickness of the composite yarn, and the composite yarn. By adjusting the yarn manufacturing method (plying conditions) and the warp overlap ratio, the warp crimp ratio can be adjusted by adjusting the manufacturing conditions (warp tension, weft pull-out tension), and the warp overlap ratio can be adjusted to CF (especially warp). The warp overlap ratio CV value can be controlled by adjusting the warp tension balance (number of reed threads), manufacturing conditions (weft pull-out tension), and the number of warp twists. Can be done. By optimizing each of these regulators, the woven fabric for chest disease medical devices of the present embodiment can exert an action effect that wear resistance can be improved while using ultrafine fibers. ..
 以上の方法で製織された織物は、縫合糸を用いて対象とする医療機器用の各種部材と組み合わせ、かつカテーテルに挿入し心臓、血管系疾患等胸部の治療用デバイス、すなわち胸部疾患治医療機器(胸部大動脈瑠用治療デバイス、胸部大動脈弁置換術用デバイス、胸部ステントグラフト等)として利用することができる。またこれらの治療用デバイスを心臓、血管系疾患等胸部の治療に用いることができる。 The woven fabric woven by the above method is combined with various members for the target medical device using sutures, and inserted into a catheter to treat a chest such as a heart or vascular disease, that is, a medical device for treating chest disease. (Treatment device for thoracic aortic suture, device for thoracic aortic valve replacement, thoracic stent graft, etc.). In addition, these therapeutic devices can be used for the treatment of the chest such as heart and vascular diseases.
 以下、本発明を実施例、比較例により具体的に説明するが、本発明はこれらの実施例に限定されるものではない。尚、物性の主な測定値は以下の方法で測定した。
(1)総繊度・単糸繊度
(原糸の評価)
 総繊度(dtex)は、繊維束を1周1mのかせに50回転巻き取り、その糸条の重量を計測し、それを200倍した値である。単糸繊度(dtex)は、前記方法で求めた総繊度を単糸数で除した値である。
(織物からの評価、分解糸の総繊度・単糸繊度)
 200mm×200mmの試験片を3枚採取する。1枚につき、経糸及び緯糸それぞれ5本の糸をほどいて走査型電子顕微鏡(SEM)の試料台にうすく広げ、SEMによる観察を500倍~1000倍相当の倍率で行う。得られたSEM画像について、繊維束の方向と直行方向にラインを引き、ラインに交差する単糸10本をランダムに選択しその直径(繊維径)を拡大画像から実測する。単糸10本の繊維径の平均値から繊度換算し、分解糸の単糸繊度とする。また、分解糸の単糸繊度と原糸の単糸数との積を分解糸の総繊度とする。尚、2種以上の異なる繊維を合撚する場合は繊維種毎に上記同様にそれぞれ単糸10本の繊維径を計測して単糸繊度及び総繊度を算出する。
Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. The main measured values of physical properties were measured by the following methods.
(1) Total fineness / single yarn fineness (evaluation of raw yarn)
The total fineness (dtex) is a value obtained by winding a fiber bundle 50 times with a skein of 1 m per circumference, measuring the weight of the thread, and multiplying it by 200. The single yarn fineness (dtex) is a value obtained by dividing the total fineness obtained by the above method by the number of single yarns.
(Evaluation from woven fabric, total fineness of decomposed yarn / single yarn fineness)
Collect three 200 mm x 200 mm test pieces. Each of the warp and weft threads is unwound and spread thinly on a scanning electron microscope (SEM) sample table, and SEM observation is performed at a magnification equivalent to 500 to 1000 times. With respect to the obtained SEM image, a line is drawn in the direction of the fiber bundle and the direction perpendicular to the fiber bundle, 10 single yarns intersecting the line are randomly selected, and the diameter (fiber diameter) is measured from the enlarged image. The fineness is converted from the average value of the fiber diameters of 10 single yarns to obtain the single yarn fineness of the decomposed yarn. Further, the product of the single yarn fineness of the decomposed yarn and the number of single yarns of the raw yarn is defined as the total fineness of the decomposed yarn. When two or more different fibers are twisted together, the fiber diameters of 10 single yarns are measured for each fiber type in the same manner as described above, and the single yarn fineness and the total fineness are calculated.
(2)引張強度(cN/dtex)・引張伸度(%)
 原糸及び分解糸の引張強度及び引張伸度は、JIS-L-1013に準じて測定する。
(2) Tensile strength (cN / dtex) / tensile elongation (%)
The tensile strength and tensile elongation of the raw yarn and the decomposed yarn are measured according to JIS-L-1013.
(3)経糸・緯糸の織密度(本/2.54cm)
 JIS L-1096(2010)8.6.1に基づき測定する。試料を平らな台上に置き、不自然なしわや張力を除いて、異なる5か所について2.54cmの区間の経糸及び緯糸の本数を数え、それぞれの平均値を算出する。
(3) Weaving density of warp and weft (book / 2.54 cm)
Measure based on JIS L-1096 (2010) 8.6.1. Place the sample on a flat table, remove unnatural wrinkles and tension, count the number of warp and weft in the 2.54 cm section at 5 different locations, and calculate the average value for each.
(4)経糸又は緯糸のカバーファクター(CFw、CFf)
 カバーファクターは、前記(3)の織密度を用いて次式により算出する。
   経糸カバーファクター(CFw)=(経糸総繊度:dtex)1/2×(経糸織密度:本/2.54cm)
   緯糸カバーファクター(CFf)=(緯糸総繊度:dtex)1/2×(緯糸織密度:本/2.54cm)
   CF=CFw+CFf
 経糸又は緯糸の総繊度は、前記(1)の織物からの分解糸総繊度を用いる。
(4) Warp or weft cover factor (CFw, CFf)
The cover factor is calculated by the following formula using the weaving density of (3) above.
Warp cover factor (CFw) = (total warp fineness: dtex) 1/2 x (warp weaving density: book / 2.54 cm)
Weft cover factor (CFf) = (total weft fineness: dtex) 1/2 x (weft weaving density: book / 2.54 cm)
CF = CFw + CFf
As the total fineness of the warp or weft, the total fineness of the decomposed yarn from the woven fabric of (1) above is used.
(5)織縮み率(クリンプ率)
 JIS L-1096(2010) 8.7 B法記載の方法で測定する。
 経方向及び緯方向にそれぞれ3か所で200mmの距離に印を付け、この印内の経糸及び緯糸をそれぞれほどき、初荷重の下で真っすぐに張った長さ(mm)を測り、織縮みを算出する。織物から抜き出した経糸及び緯糸、それぞれ、20本の糸について測定し、その平均値で示す。
(5) Weaving shrinkage rate (crimp rate)
Measure according to the method described in JIS L-1096 (2010) 8.7 B method.
Mark a distance of 200 mm at three points in each of the warp and weft directions, untie the warp and weft in this mark, measure the length (mm) stretched straight under the initial load, and shrink the weave. Is calculated. The warp and weft threads extracted from the woven fabric are measured for 20 threads each, and the average value is shown.
(6)織物の厚み
 ANSI/AAMI/ISO 7198:1998/2001に準拠して織物の厚み測定をn=10で実施し、平均値と標準偏差を算出する。
(6) Woven fabric thickness Measure the woven fabric thickness at n = 10 in accordance with ANSI / AAMI / ISO 7198: 1998/2001, and calculate the average value and standard deviation.
(7)織物の透水性
 ANSI/AAMI/ISO 7198:1998/2001に準拠して織物の透水性測定を行う。透水性試験は、測定をn=5で行い、その平均値をとる。
(7) Permeability of woven fabrics The permeability of woven fabrics is measured in accordance with ANSI / AAMI / ISO 7198: 1998/2001. In the water permeability test, the measurement is performed at n = 5, and the average value thereof is taken.
(8)織物の破裂強度
 ANSI/AAMI/ISO 7198:1998/2001に準拠して以下の摩耗試験前後で織物の破裂強度試験をそれぞれn=5で実施し、その時の最大試験力の平均値で示す。また破裂強度保持率は、以下の式から算出する。
   破裂強度保持率(%)=摩耗試験後の破裂強度/摩耗試験前の破裂強度×100
[耐摩耗試験]
 JIS L 1096 8.19.5 E法に準拠するマーチンデール摩耗試験機を用いて衣類用の押圧荷重(9kPa)で摩耗回数5000回で試験を行う。
(8) Rupture strength of woven fabrics In accordance with ANSI / AAMI / ISO 7198: 1998/2001, the rupture strength tests of woven fabrics were carried out before and after the following wear tests at n = 5, and the average value of the maximum test force at that time was used. Shown. The burst strength retention rate is calculated from the following formula.
Rupture strength retention rate (%) = Rupture strength after wear test / Rupture strength before wear test x 100
[Abrasion resistance test]
Using a Martindale wear tester that complies with JIS L 1096 8.19.5 E method, the test is performed with a pressing load for clothing (9 kPa) and the number of wears is 5000 times.
(9)縫目滑脱抵抗力(N)
 JIS L 1096 8.23.1の縫目滑脱法B法に基づいて、サンプルサイズ16mm×82mmの試験片を経方向と、緯方向に、それぞれ、10枚準備し、この試験片を中表にして長さ半分に折り、折り目から10mmのところを、縫い始めと縫い終わりの1針ぶんを返し縫いして縫合し、折り目を切断する。準備した試験片を引張り試験機でチャック間距離30mmになるように挟み、縫目部分が破壊されるまで荷重を付加し、そのときの最大荷重を記録し、n=10の平均値を算出する。
(9) Seam slip resistance (N)
Based on JIS L 1096 8.23.1, the seam slip-off method B method, prepare 10 test pieces with a sample size of 16 mm x 82 mm in the warp direction and the weft direction, respectively, and turn this test piece into the middle table for length. Fold it in half, sew 10 mm from the crease by reverse stitching one stitch at the beginning and end of sewing, and cut the crease. Hold the prepared test piece with a tensile tester so that the distance between the chucks is 30 mm, apply a load until the seam is broken, record the maximum load at that time, and calculate the average value of n = 10. ..
(10)織物の引裂き強さ(N)
 JIS L 1096 8.17.3のC法(トラペゾイド法)に基づいて、経糸方向×緯糸方向:150mm×75mm(経糸引裂き)、41mm×82mm(緯糸引裂き)の2種類の試験片を、それぞれ、3枚準備し、長辺部分の片側中央部分に10mmの切れ目を入れる。準備した試験片を引張り試験機で経糸引裂きはチャック間距離25mm、試験速度15mm/min、緯糸引裂きはチャック間距離14mm、試験速度8.5mm/minの条件で生地が2つに引裂かれるまで引張り、そのときの最大荷重を記録しn=3の平均値を算出する。
(10) Tear strength of woven fabric (N)
Based on JIS L 1096 8.17.3 C method (trapezoid method), warp direction x weft direction: 150 mm x 75 mm (warp tear), 41 mm x 82 mm (weft tear), 3 pieces each Prepare and make a 10mm cut in the center of one side of the long side. Pull the prepared test piece with a tensile tester until the dough is torn in two under the conditions of a chuck distance of 25 mm and a test speed of 15 mm / min for warp tearing and a chuck distance of 14 mm and a test speed of 8.5 mm / min for weft tearing. Record the maximum load at that time and calculate the average value of n = 3.
(11)糸重なり率及びCV値
 緯糸重なり率aは、図1に示すように、経糸方向10mm以上、緯糸方法20mm以上で任意に切り取った織物を、X線CTで経糸の表面と裏面を通る隣り合う緯糸同士、経糸同士の重なり部の数が多くても50個以下になる倍率で任意の箇所2点以上を撮影し、下記式(1)で算出される緯糸同士の重なり部20個以上の重なり率の平均値である。
Figure JPOXMLDOC01-appb-M000003

 尚、図1中、緯糸重なり率a’は、同様に、=(b’ + b”) / c’で算出される。
(11) Thread overlap ratio and CV value As shown in FIG. 1, the weft overlap ratio a passes through the front and back surfaces of the warp by X-ray CT of a woven fabric arbitrarily cut with a warp direction of 10 mm or more and a weft method of 20 mm or more. The number of overlapping parts between adjacent weft yarns and warp yarns is 50 or less at most. Two or more points are photographed at arbitrary points, and 20 or more overlapping parts between weft yarns calculated by the following formula (1). It is the average value of the overlap rate of.
Figure JPOXMLDOC01-appb-M000003

In FIG. 1, the weft overlap ratio a'is similarly calculated by = (b'+ b ") / c'.
 糸重なり率aのCV値は下記式(2)で算出される。
Figure JPOXMLDOC01-appb-M000004
The CV value of the thread overlap ratio a is calculated by the following formula (2).
Figure JPOXMLDOC01-appb-M000004
 図2に示すように、緯糸重なり率と同様に、経糸重なり率A及び経糸重なり率AのCV値は、緯糸重なり率の計測と同様に撮影したX線CT画像から下記式(3):
Figure JPOXMLDOC01-appb-M000005

、及び下記式(4):
Figure JPOXMLDOC01-appb-M000006

で、それぞれ、算出される。
 尚、図2中、経糸重なり率C’は、同様に、=(B’ + B”) / C’で算出される。
As shown in FIG. 2, the CV values of the warp overlap rate A and the warp overlap rate A are determined from the X-ray CT image taken in the same manner as the measurement of the weft overlap rate according to the following equation (3):
Figure JPOXMLDOC01-appb-M000005

, And the following equation (4):
Figure JPOXMLDOC01-appb-M000006

, Each is calculated.
In FIG. 2, the warp overlap ratio C'is similarly calculated by = (B'+ B ") / C'.
[実施例1]
 経糸に総繊度31dtex/22F、単糸繊度1.4dtex、引張強度5.0cN/dtex、引張伸度31%のポリエステル繊維を500回/m(S方向撚)撚糸した糸を用い、緯糸に総繊度42dtex/140F、単糸繊度0.3dtex、引張強度4.2cN/dtex、引張伸度34%の極細繊維を100回/m(S方向撚)撚糸し、電子式ジャガード方式の開口装置を備えたシャトル織機にて、経糸張力0.7g/dtex、緯糸引き出し張力8g(0.2g/dtex)で内径28.5mmの平織筒状シームレス織物を作製した。さらに、この織物をプレ熱セット(160℃で20分間)、精練(80℃の熱水で30分×3回)、最終熱セット(180℃で20分間)を行った。得られた織物の評価結果を以下の表1に示す。
[Example 1]
A polyester fiber with a total fineness of 31dtex / 22F, a single yarn fineness of 1.4dtex, a tensile strength of 5.0cN / dtex, and a tensile elongation of 31% is twisted 500 times / m (S direction twist) for the warp, and the total fineness is 42dtex for the weft. / 140F, single yarn fineness 0.3dtex, tensile strength 4.2cN / dtex, ultrafine fiber with tensile elongation 34% is twisted 100 times / m (S direction twist) to make a shuttle loom equipped with an electronic jacquard opening device. Then, a plain woven tubular seamless woven fabric having an inner diameter of 28.5 mm was produced with a warp tension of 0.7 g / dtex and a weft pull-out tension of 8 g (0.2 g / dtex). Further, this woven fabric was preheated (at 160 ° C. for 20 minutes), smelted (30 minutes × 3 times with hot water at 80 ° C.), and finally heat-set (180 ° C. for 20 minutes). The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例2]
 緯糸に総繊度42dtex/140F、単糸繊度0.3dtex、引張強度4.2cN/dtex、引張伸度34%の極細繊維と、実施例1の経糸に用いたレギュラー繊維とを100回/m(S方向撚)合撚した繊維を用いた以外は、実施例1と同様に製織・プレ熱セット・精練・最終熱セットを行った。得られた織物の評価結果を以下の表1に示す。
[Example 2]
For the weft, ultrafine fibers with a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, and a tensile elongation of 34% and the regular fibers used for the warp of Example 1 were used 100 times / m (S direction). Twisting) Weaving, preheating set, scouring, and final heat setting were performed in the same manner as in Example 1 except that the fused and twisted fibers were used. The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例3]
 緯糸に総繊度42dtex/140F、単糸繊度0.3dtex、引張強度4.2cN/dtex、引張伸度34%の極細繊維と、実施例1の経糸に用いたレギュラー繊維とを交互に用いた以外は、実施例1と同様に製織・プレ熱セット・精練・最終熱セットを行った。得られた織物の評価結果を以下の表1に示す。
[Example 3]
Except for the alternating use of ultrafine fibers having a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, and a tensile elongation of 34% for the weft, and the regular fibers used for the warp of Example 1. Weaving, pre-heating set, scouring, and final heat setting were performed in the same manner as in Example 1. The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例4]
 緯糸に総繊度23dtex/140F、単糸繊度0.2dtex、引張強度4.0cN/dtex、引張伸度39%の極細繊維を用い、経糸張力0.7g/dtex、緯糸引き出し張力6g(0.3g/dtex)で内径28.5mmの平織筒状シームレス織物を作製した以外は、実施例1と同様に製織・プレ熱セット・精練・最終熱セットを行った。得られた織物の評価結果を以下の表1に示す。
[Example 4]
The weft uses ultrafine fibers with a total fineness of 23dtex / 140F, a single yarn fineness of 0.2dtex, a tensile strength of 4.0cN / dtex, and a tensile elongation of 39%, with a warp tension of 0.7g / dtex and a weft pull-out tension of 6g (0.3g / dtex). Weaving, preheating set, scouring, and final heat setting were performed in the same manner as in Example 1 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced. The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例5]
 緯糸に総繊度42dtex/140F、単糸繊度0.3dtex、引張強度4.2cN/dtex、引張伸度34%の極細繊維と、総繊度42dtex/8F、単糸繊度5.3dtex、引張強度4.0cN/dtex、引張伸度37%の無撚のレギュラー繊維とを100回/m(S方向撚)合撚した繊維を用い、緯糸引き出し張力17g(0.2g/dtex)で製織した以外は、実施例1と同様に製織・プレ熱セット・精練・最終熱セットを行った。得られた織物の評価結果を以下の表1に示す。
[Example 5]
Weft has a total fineness of 42dtex / 140F, a single yarn fineness of 0.3dtex, a tensile strength of 4.2cN / dtex, an ultrafine fiber with a tensile elongation of 34%, a total fineness of 42dtex / 8F, a single yarn fineness of 5.3dtex, and a tensile strength of 4.0cN / dtex. Same as Example 1 except that a non-twisted regular fiber with a tensile elongation of 37% and a fiber twisted 100 times / m (S direction twist) are woven at a weft drawing tension of 17 g (0.2 g / dtex). Weaving, pre-heating set, scouring, and final heat setting were performed. The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例6]
 実施例2に記載した極細繊維とレギュラー繊維とを合撚した複合糸に、さらにエアー圧0.02Mpaでインターレースをかけた以外は、実施例1と同様に製織・プレ熱セット・精練・最終熱セットを行った。得られた織物の評価結果を以下の表1に示す。
[Example 6]
Weaving, preheat set, scouring, and final heat set are the same as in Example 1, except that the composite yarn obtained by twisting the ultrafine fibers and regular fibers described in Example 2 is further interlaced with an air pressure of 0.02 Mpa. Was done. The evaluation results of the obtained woven fabric are shown in Table 1 below.
[実施例7]
 緯糸の複合糸の引き出し張力を35g(0.5g/dtex)で製織した以外は、実施例2と同様に織物を作製した。得られた織物の評価結果を以下の表1に示す。
[Example 7]
A woven fabric was produced in the same manner as in Example 2 except that the pull-out tension of the composite yarn of the weft yarn was 35 g (0.5 g / dtex). The evaluation results of the obtained woven fabric are shown in Table 1 below.
[比較例1]
 経糸張力1.6 g/dtexで内径28.5mmの平織筒状シームレス織物を作製した以外は、実施例4と同様に織物を作製した。得られた織物の評価結果を以下の表2に示す。得られた織物は、緯糸のクリンプ率が14.8%であり、緯糸の極細繊維が織物表面に突出しているため、摩耗試験後に破裂強度が大幅に低下した。
[Comparative Example 1]
A woven fabric was produced in the same manner as in Example 4 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced with a warp tension of 1.6 g / dtex. The evaluation results of the obtained woven fabric are shown in Table 2 below. In the obtained woven fabric, the crimp rate of the weft was 14.8%, and the ultrafine fibers of the weft were projected on the surface of the woven fabric, so that the burst strength was significantly reduced after the abrasion test.
[比較例2]
 経糸張力0.9 g/dtex、緯糸引き出し張力3g(0.07g/dtex)で内径28.5mmの平織筒状シームレス織物を作製した以外は、実施例1と同様に織物を作製した。得られた織物の評価結果を以下の表2に示す。得られた織物は、緯糸のクリンプ率が14.5%であり、緯糸の極細繊維が織物表面に突出しているため、摩耗試験後に破裂強度が大幅に低下した。
[Comparative Example 2]
A woven fabric was produced in the same manner as in Example 1 except that a plain weave tubular seamless fabric having an inner diameter of 28.5 mm was produced with a warp tension of 0.9 g / dtex and a weft pull-out tension of 3 g (0.07 g / dtex). The evaluation results of the obtained woven fabric are shown in Table 2 below. In the obtained woven fabric, the crimp rate of the weft was 14.5%, and the ultrafine fibers of the weft were projected on the surface of the woven fabric, so that the burst strength was significantly reduced after the abrasion test.
[比較例3]
 実施例2の経糸密度200本/inchに対して、高く設定(214本/inch)した以外は、実施例1と同様に織物を作製した。得られた織物の評価結果を以下の表2に示す。
[Comparative Example 3]
A woven fabric was produced in the same manner as in Example 1 except that the warp density of Example 2 was set high (214 threads / inch) with respect to the warp density of 200 threads / inch. The evaluation results of the obtained woven fabric are shown in Table 2 below.
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000008
Figure JPOXMLDOC01-appb-T000008
 本発明の胸部疾患医療機器用織物は、特定のポリエステルマルチフィラメントレギュラー繊維を経糸に配し、特定の単糸繊度0.5dtex以下のフィラメントを含むあるポリエステルマルチフィラメント極細繊維を緯糸に配し、経糸の織縮み(クリンプ)率を0.2%以上8.0%以下、緯糸のクリンプ率を3.0%以上14.0%以下の範囲に、そして緯糸のクリンプ率を経糸のクリンプ率よりも大きいものに特定することで、該極細繊維の織物表面への突出が抑制され、耐摩耗性が向上するため、特に高い耐摩耗性が要求される胸部疾患医療機器用織物として好適に利用可能である。 In the woven fabric for medical devices for chest diseases of the present invention, a specific polyester multifilament regular fiber is arranged on the warp, and a certain polyester multifilament ultrafine fiber containing a specific filament with a single yarn fineness of 0.5 dtex or less is arranged on the weft. By specifying the weaving shrinkage (crimp) rate in the range of 0.2% or more and 8.0% or less, the weft yarn crimp rate in the range of 3.0% or more and 14.0% or less, and the weft yarn crimp rate in a range larger than the warp yarn crimp rate. Since the protrusion of the ultrafine fibers to the surface of the woven fabric is suppressed and the wear resistance is improved, it can be suitably used as a woven fabric for medical equipment for chest diseases, which requires particularly high wear resistance.
a   緯糸重なり部
a’  緯糸重なり部
b   緯糸幅
b’  緯糸幅
b’’ 緯糸幅
c   隣接する2つの合計緯糸幅
c’  隣接する2つの合計緯糸幅
B   経糸幅
B’  経糸幅
B’’ 経糸幅
C   隣接する2つの合計経糸幅
C’  隣接する2つの合計経糸幅
a Weft overlap part a'Weft overlap part b Weft width b'Weft width b''Weft width c Adjacent two total weft width c'Adjacent two total weft width B Warp width B'War yarn width B''War yarn width C Two adjacent total warp widths C'Two adjacent total warp widths

Claims (12)

  1.  単糸繊度が異なる少なくとも2種のポリエステルマルチフィラメントからなる胸部疾患医療機器用織物であって、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も大きい、単糸繊度0.5dtex超10dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、経糸に配され、該少なくとも2種のポリエステルマルチフィラメントの内、単糸繊度が最も小さい、単糸繊度0.5dtex以下のフィラメントを含み、かつ、総繊度が7dtex以上120dtex以下であるポリエステルマルチフィラメントが、緯糸に配され、該経糸のJIS L1096 8.7 B法に準拠する織縮み(クリンプ)率が0.2%以上8.0%以下であり、該緯糸のクリンプ率が3.0%以上14.0%以下であり、かつ、該緯糸のクリンプ率が該経糸のクリンプ率より大きいことを特徴とする胸部疾患医療機器用織物。 A woven fabric for chest disease medical equipment composed of at least two types of polyester multifilaments having different single yarn fineness, and the single yarn fineness is the largest among the at least two types of polyester multifilaments, and the single yarn fineness is more than 0.5 dtex and 10 dtex or less. Polyester multifilaments containing the above filaments and having a total fineness of 7 dtex or more and 120 dtex or less are arranged in the warp yarns, and among the at least two types of polyester multifilaments, the single yarn fineness is the smallest, and the single yarn fineness is 0.5 dtex or less. Polyester multifilament containing the above filaments and having a total fineness of 7 dtex or more and 120 dtex or less is arranged on the weft yarn, and the weaving shrinkage (crimp) rate of the warp yarn conforming to the JIS L1096 8.7 B method is 0.2% or more and 8.0% or less. A woven fabric for a medical device for chest disease, wherein the crimp rate of the weft is 3.0% or more and 14.0% or less, and the crimp rate of the weft is larger than the crimp rate of the warp.
  2.  前記単糸繊度が最も大きいポリエステルマルチフィラメントの単糸繊度が0.5超2.5dtex以下である、請求項1に記載の胸部疾患医療機器用織物。 The woven fabric for a medical device for chest disease according to claim 1, wherein the polyester multifilament having the highest single yarn fineness has a single yarn fineness of more than 0.5 and 2.5 dtex or less.
  3.  単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントと、単糸繊度0.5dtex以下のポリエステルマルチフィラメントとの複合糸であって、総繊度20dtex以上120dtex以下である該複合糸が、経糸及び/又は緯糸に配されていることを特徴とする胸部疾患医療機器用織物。 A composite yarn of a polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less and a polyester multifilament having a single yarn fineness of 0.5 dtex or less and having a total fineness of 20 dtex or more and 120 dtex or less is a warp yarn and / or a weft yarn. A woven fabric for chest disease medical devices, which is characterized by being arranged in.
  4.  前記複合糸の、前記単糸繊度0.5dtex超10dtex以下のポリエステルマルチフィラメントの配合比率が15重量%以上65重量%以下である、請求項3に記載の胸部疾患医療機器用織物。
    The woven fabric for a medical device for chest disease according to claim 3, wherein the blending ratio of the polyester multifilament having a single yarn fineness of more than 0.5 dtex and 10 dtex or less in the composite yarn is 15% by weight or more and 65% by weight or less.
  5.  前記緯糸の重なり率(緯糸重なり率)が0.90以上であり、かつ、前記経糸の重なり率(経糸重なり率)が0.90未満である、請求項1~4のいずれか1項に記載の胸部疾患医療機器用織物。 The chest disease medical treatment according to any one of claims 1 to 4, wherein the weft overlap rate (weft overlap rate) is 0.90 or more, and the warp overlap rate (warp overlap rate) is less than 0.90. Woven fabric for equipment.
  6.  前記緯糸重なり率のCV値が0.1以下であり、かつ、前記経糸重なり率のCV値が0.1以下である、請求項5に記載の胸部疾患医療機器用織物。 The woven fabric for a chest disease medical device according to claim 5, wherein the CV value of the weft overlap rate is 0.1 or less, and the CV value of the warp overlap rate is 0.1 or less.
  7.  JIS L 1096 8.19.5 E法に準拠するマーチンデール摩耗試験機を用いた摩耗回数5000回の摩耗試験後のANSI/AAMI/ISO 7198:1998/2001に準拠した織物の破裂強度が、140N以上である、請求項1~6のいずれか1項に記載の胸部疾患医療機器用織物。 The burst strength of the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 after the abrasion test of 5000 times using the Martindale abrasion tester conforming to JIS L 1096 8.19.5 E method is 140 N or more. The woven fabric for a medical device for chest disease according to any one of claims 1 to 6.
  8.  前記摩耗試験前後における破裂強度の保持率が、65%以上である、請求項7に記載の胸部疾患医療機器用織物。 The woven fabric for a medical device for chest disease according to claim 7, wherein the retention rate of the burst strength before and after the wear test is 65% or more.
  9.  ANSI/AAMI/ISO 7198:1998/2001に準拠した織物の透水性が、400cc/cm2/min以下である、請求項1~8のいずれか1項に記載の胸部疾患医療機器用織物。 The woven fabric for a medical device for chest disease according to any one of claims 1 to 8, wherein the woven fabric conforming to ANSI / AAMI / ISO 7198: 1998/2001 has a water permeability of 400 cc / cm 2 / min or less.
  10.  請求項1~9のいずれか1項に記載の胸部疾患医療機器用織物の内側面及び/又は外側面に金属部材を縫合糸により縫合・固定された胸部疾患治療用医療機器。 A medical device for treating thoracic disease, wherein a metal member is sutured and fixed to the inner surface and / or outer surface of the woven fabric for thoracic disease medical device according to any one of claims 1 to 9.
  11.  前記胸部疾患治療用医療機器が、胸部大動脈瘤用治療用デバイスである、請求項10に記載の胸部疾患治療用医療機器。 The medical device for treating thoracic disease according to claim 10, wherein the medical device for treating thoracic disease is a device for treating thoracic aortic aneurysm.
  12.  前記胸部疾患治療用医療機器が、胸部大動脈弁置換術用デバイスである、請求項10に記載の胸部疾患治療用医療機器。 The medical device for treating thoracic disease according to claim 10, wherein the medical device for treating thoracic disease is a device for thoracic aortic valve replacement.
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JP2016014204A (en) * 2014-07-02 2016-01-28 旭化成せんい株式会社 Fabric for medical care
JP2016123764A (en) * 2015-01-06 2016-07-11 旭化成株式会社 High density medical fabric
WO2016190202A1 (en) * 2015-05-27 2016-12-01 東レ株式会社 Tubular woven fabric structure
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