JP2003275229A - Method for manufacturing hollow woven tubular material for blood vessel prosthetic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a hollow woven tubular material for a blood vessel prosthetic material of high quality which prevents a looseness of warps of a part which does not contribute to the formation of the tubular material and troubles such as an thread breakage and an opening fault caused by the looseness of the warps which have been a problem in the conventional manufacture of the hollow woven tubular material for the blood vessel prosthetic material according to a jacquard system, and which continuously stably weaves. <P>SOLUTION: The method for manufacturing the hollow woven tubular material A for the blood vessel prosthetic material by using a shuttle loom with a jacquard apparatus is provided with at least one shuttle C for inserting wefts G to the warp rows E of the part which contributes to the formation of the material A, and at least one shuttle D for inserting wefts H to warp rows F of the part which does not contribute to the formation of the material and comprises the steps of operating these shuttles to simultaneously form a tubular material A and a woven part B except the material A. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a hollow weave tubular body for a vascular prosthesis material, and more specifically, it continuously weaves a high quality hollow weave tubular body for a blood vessel prosthesis material by a jacquard method. To a manufacturing method for doing.

[0002]

2. Description of the Related Art A vascular prosthesis material is widely used as a substitute blood vessel for replacing or repairing a damaged or diseased blood vessel. Regarding the vascular prosthesis material, its material, structure, surface modification, physical performance, etc. have been studied for a long time, and polyester fibers were woven or knitted into a tubular body, or polytetrafluoroethylene resin was formed into a tubular shape. Things have been put to practical use. Of these, the woven tubular body can have low porosity,
This makes it possible to enhance liquid tightness, has high strength (breakage, rupture, etc.), and has a small radial expansion after transplantation. Therefore, the woven tubular body is particularly suitably used as a large-diameter vascular prosthesis material used for treatment of a thoracic / abdominal aorta where blood flows quickly. Further, in recent years, as a minimally invasive treatment for aortic aneurysm or aortic dissection, endovascular treatment in which a stent-type vascular prosthesis material is percutaneously introduced into a blood vessel via a catheter and left in a lesion site has been attracting attention. The stent-type vascular prosthesis is inserted into the catheter in a small folded state. At this time, the folded volume of the vascular prosthesis becomes a problem. The wall thickness of the woven tubular body can be made extremely thin, and the folding volume can be reduced. Thus, liquid tightness,
The woven tubular body having excellent physical properties such as strength and foldability is suitably used for endovascular treatment as a tubular body for a stent-type vascular prosthesis in the form of a combination with a stent.

Such a woven tubular body can be manufactured by joining flat woven fabrics into a tubular form by sewing, fusing or the like, or by making a tubular form from the weaving stage by a bag-weaving technique. According to the latter method,
A seamless tubular body can be obtained, and when transplanted to an affected area, it becomes a vascular prosthesis material having excellent antithrombogenicity and strength. Also,
The step of joining the woven fabrics is not necessary, and the steps can be simplified. For this reason, this method is currently used exclusively.

To manufacture a tubular body for a vascular prosthesis by bag-weaving, a shuttle loom equipped with a dobby or jacquard as an opening device is usually used. A shuttle loom is a loom that uses a shuttle (one of the weft insertion tools) to pass a weft between warps. It is mainly used for manufacturing narrow width fabrics such as labels and fashion ribbons because of its features such as the ability to efficiently produce narrow width fabrics and the easy management of weft tension.

Dobby, which is one of the shedding devices, is capable of controlling shedding by dividing warp yarns into groups of several to several tens and consisting of several to several thousand yarns. Suitable for manufacturing. Specifically, set the number of warps necessary to form the target tubular body on the loom, open the warp by the dobby device, and use the shuttle to all warps set on the loom. Insert the weft.
However, when changing the diameter size of the tubular body, that is, when changing the width of the tubular body in a state in which the tubular body is folded flat, in the weaving by the dobby method, the number of warp threads set in the loom is reduced or increased. It is necessary to change the diameter size (width), which takes time and effort.

[0006] The diameter size of the vascular prosthesis varies depending on the implantation site, and it ranges from 7 mm or less (small caliber vascular prosthesis) used for the treatment of peripheral blood vessels to 7 to 54 mm (large caliber for the treatment of thoracic / abdominal aorta). Wide range of materials including vascular prosthesis). Furthermore, the shape of the vascular prosthesis material is diversified into not only the straight type but also the branched type and the conical type. It is difficult to manufacture tubular bodies of shapes other than straight type by weaving by the dobby method, and when such a vascular prosthesis material is required, there is no choice but to join the straight type tubular bodies by sewing, fusion bonding, etc. .

On the other hand, the jacquard device is capable of opening one to several warp yarns one by one, and can manufacture a fabric having an extremely complicated design. Specifically, of the warp threads set in the loom, only the warp thread row of the portion necessary for forming the target tubular body, that is, the warp thread row that contributes to the tubular body formation and forms a part of the tubular body Is opened by a jacquard device, and the weft is inserted into the warp of that portion. Since it is possible to freely select the number of warps corresponding to the diameter size (width) of the target tubular body, the labor and time required for changing the diameter size (width) of the tubular body can be significantly reduced. Further, a tubular body having a shape other than the straight type such as a branched type or a conical type can be manufactured, and a seamless tubular body can be obtained.

However, since wefts are not inserted in the warp rows of the portion that do not contribute to the formation of the tubular body, when weaving continuously, the warp of that portion is loosened, causing troubles such as yarn breakage and poor opening, and weaving. However, there is a problem in that the quality of the tubular body is deteriorated and the loose warp is caught by the weft yarn for weaving the tubular body, which causes quality defects such as fluff in the tubular body. In particular, when a yarn having a high rigidity and a change in tension is apt to appear clearly, such as a monofilament or a multifilament having a large single yarn fineness, is a serious problem.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation as described above, and solves the conventional problems that occur when manufacturing a hollow weave tubular body for a vascular prosthesis by the jacquard system. An object of the present invention is to provide a method for continuously and stably weaving and producing a high-quality hollow weave tubular body for a vascular prosthesis material.

[0010]

The present inventors have arrived at the present invention as a result of intensive studies to solve the above problems.
The present invention achieves the above object and has the following configuration. A method for producing a hollow weave tubular body for a vascular prosthesis material according to the present invention is a method for producing a hollow weave tubular body A for a blood vessel prosthesis material using a shuttle loom with a jacquard device,
The weft yarn G is added to the warp yarn row E which is a portion contributing to the formation of the tubular body A.
At least one shuttle C for inserting the weft and at least one shuttle D for inserting the weft H in the warp row F of the portion that does not contribute to the formation of the tubular body are provided in the loom, and these are operated. , Tubular body A,
The weaving part B other than the tubular body A is formed at the same time.

According to this method, it is possible to prevent the loosening of the warp yarn in the portion which does not contribute to the formation of the tubular body, which has been a problem in the manufacture of the hollow weave tubular body by the jacquard system, and to continuously weave the fabric. It becomes possible to do. The method for producing a hollow weave tubular body for a vascular prosthesis according to the present invention is particularly effective when a monofilament or a multifilament having a large single yarn fineness, for example, a multifilament having a single yarn fineness of 5.5 to 50 dtex is used for the warp. Demonstrate.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification, the “bag weave tubular body for blood vessel prosthesis” may be simply referred to as “bag weave tubular body” or “tubular body”. The method for producing a hollow weave tubular body for a blood vessel prosthesis according to the present invention is a method for producing a hollow weave tubular body for a blood vessel prosthesis material using a shuttle loom with a jacquard device. The jacquard device used in the present invention may be either an electronic type or a mechanical type, but in consideration of the diameter size (width) of the tubular body, the ease of changing the shape, and the productivity, the electronic jacquard is used. A device is preferred.

FIG. 1 is a plan view schematically showing the steps for manufacturing the hollow weave tubular body A for a vascular prosthesis according to the present invention. In the method for manufacturing a hollow weave tubular body for a vascular prosthesis according to the present invention, the weft yarn H is also inserted into the warp row F that does not contribute to the formation of the tubular body A, and the weave portion B different from the tubular body A is formed. It is characterized by doing. By weaving in this way,
Tension will be applied to all the warp threads set in the loom, and during weaving, looseness that tends to occur in the warp row F of the portion that does not contribute to the formation of the tubular body A, thread breakage due to it, defective opening, etc. Since it is possible to prevent such troubles, it is possible to continuously and stably weaving.

In order to perform such weaving, it is necessary to equip the loom with at least two shuttles. 1
One is a shuttle C that carries a weft thread G that contributes to the formation of the tubular body A and that inserts the weft thread G into the warp row E that contributes to the formation of the tubular body A. The other is a shuttle body C. A weft H that does not contribute to the formation of A and carries a weft H that contributes to the formation of the weaving portion B is inserted, and the weft H is inserted into the warp row F of the portion that does not contribute to the formation of the tubular body A to form the weaving portion B. Shuttle D for.

The number of shuttles provided in the loom is determined by the shape of the tubular body, the number of weaving parts B, and the like. At this time, if the time during which the shuttle is stopped without operating is extended, the weft carried on the shuttle loosens,
Care must be taken because problems such as yarn breakage and poor opening will occur and weavability will deteriorate.

FIG. 8 is a plan view schematically showing the steps in the case of manufacturing the hollow weave tubular body A for a bifurcated vascular prosthesis by the conventional method. Usually, when manufacturing a branched tubular body, the number of shuttles corresponding to the number of branch pipes, and for the two-branched tubular body of FIG. 8, two shuttles are installed in a loom for weaving. When weaving the main pipe A1 instead of operating all of them all the time, only one shuttle C1 is operated and the remaining shuttle C1 is operated.
2 will be stopped. According to the conventional method, in addition to the looseness of the warp row F at the portion that does not contribute to the formation of the tubular body A,
If the stop time of Shuttle C2 becomes long, Shuttle C2
There was a problem that the weft thread G2 carried by No. 2 also loosened and stable weaving could not be performed.

As described above, in the case where there is a shuttle which is continuously stopped among the plurality of shuttles provided for forming the tubular body, this shuttle can be operated as the shuttle D to form the woven portion B. That is, as shown in FIG. 6, when weaving the main pipe portion A1,
The shuttle C2 / D that does not contribute to this is actuated, and the weft G2 / H is added to the warp row F of the portion that does not contribute to the formation of the tubular body A.
And the weaving section B may be formed. By doing so, it is possible to prevent the weft thread G2 / H carried on the shuttle C2 / D from being loosened, and at the same time, to prevent the warp thread row F from being loosened in the portion which does not contribute to the formation of the tubular body A.

The frequency of inserting the wefts, the length of the weaving portion B formed by the wefts, and the weft density with respect to the warp row of the portion which does not contribute to the formation of the tubular body are not particularly limited. You need to be careful. That is, the higher the frequency of inserting the weft yarns, the more stable the tension of the warp yarns and the better the weavability, but the lower the productivity. The frequency of weft insertion should be determined in consideration of the balance between warp tension stability and productivity.

The weaving structure of the tubular body is not particularly limited, and examples thereof include plain weave, twill weave, satin weave, satin weave, etc. However, the wall thickness is thin and the strength (breaking strength, bursting strength) or liquid Plain weave is preferred because it is easy to obtain a tubular body with excellent tightness.

The weaving structure of the weaving portion B is not particularly limited and may be, for example, plain weave, twill weave, satin weave, satin weave, etc. However, plain weave is preferred because tension can be easily maintained uniformly.

The yarn used in the method for producing the hollow weave tubular body for vascular prosthesis of the present invention is not particularly limited,
Both monofilaments and multifilaments can be used and the fineness is arbitrary, but among them, the fineness is 5.5, which is difficult to weave by the conventional manufacturing method.
〜250 dtex monofilament and single yarn fineness is 5.
When a multifilament of 5 to 50 dtex is used for the warp, it is particularly effective.

Although the material thereof is not particularly limited, polyester fiber is preferable in view of its use as a vascular prosthesis material. Polyester fiber has been widely used as a vascular prosthesis material because it is chemically stable, has high durability, high mechanical strength, and has no toxicity or foreign substance reaction. Specific examples of polyester fibers include polyethylene terephthalate, polybutylene terephthalate, polyester-polyether block copolymers, and composite fibers thereof.

[0023]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples. 1 to 8 (corresponding to Examples 1 to 5 and Comparative Examples 1 and 2) using a shuttle loom equipped with an electronic jacquard device, and a hollow weave tubular body A for vascular prosthesis material (plain weave structure)
Was manufactured. In parallel with this, in Examples 1 to 5, a woven portion B (plain weave design) different from the tubular body A was manufactured. The yarns used are as follows. Warp: Single yarn fineness 18 dtex, total fineness 36 dtex composed of 2 filaments, untwisted polyethylene terephthalate multifilament weft: Single yarn fineness 0.55 dtex, filament 17
Total fineness of 94 dtex, 200 twists
Polypropylene terephthalate multifilament of times / m

[Example 1] Two shuttles were attached to a loom, and the hollow type tubular body A for straight type vascular prosthesis material shown in Fig. 1 was continuously manufactured. In parallel with this, the tubular body A
Weaving part B different from the above was continuously produced. Of the warp yarns (2000 yarns) set on the loom, the warp yarn row E (600 yarns) that contributes to the formation of the tubular body A is opened by the jacquard device, and the shuttle C is operated to insert the weft yarns G. Thereby, the tubular body A was manufactured. In parallel with this, the warp yarn rows F1 and F2 (700 yarns each) that do not contribute to the formation of the tubular body A are simultaneously opened by the jacquard device, and the shuttle D is operated to insert the weft yarn H, Weaving parts B1 and B2 were manufactured. As shown in FIG. 2, weaving parts B1 and B2 arranged on both sides of the tubular body A are connected by a weft H and are integrated (weaving part B). Here, FIG. 2 is a perspective view schematically showing the states of the tubular body A and the woven portion B in FIG. 1.

The above manufacturing procedure will be described by focusing on the operation of the shuttle. At the start of weaving, if shuttles C and D are in the positions shown in FIG. 1 (on the right side of the warp), step 1: move shuttle C from the right side to the left side,
The weft G is inserted into the warp row E. Step 2: Move shuttle D from right to left
The weft yarn H is inserted into the warp yarn rows F2 and F1. Step 3: Move shuttle C from left to right,
The weft G is inserted into the warp row E. Step 4: Move shuttle D from left to right
The weft yarn H is inserted into the warp yarn rows F1 and F2. By repeating steps 1 to 4, the tubular body A and the woven portion B were simultaneously and continuously manufactured. The straight type vascular prosthesis tubular body for a vascular prosthesis material manufactured in this manner is cut into a desired length according to the affected area and put into practical use.
The weavability in this example was good, and the quality of the obtained tubular body was also good.

[Embodiment 2] The number of warp rows E in the portion contributing to the formation of the tubular body A is 1200, and the weaving portions B1 and B2 are formed in the portion not contributing to the formation of the tubular body A. The procedure was the same as in Example 1 except that the number of the warp yarn rows F1 and F2 in the portion that contributes to 400 was 400 each (FIG. 3). The weavability in this example was good, and the quality of the obtained tubular body was also good.

[Example 3] The same procedure as in Example 1 was carried out except that the woven portion B was intermittently manufactured at regular intervals. At this time, weaving was performed so that the length L of the weaving portion B was 5 mm and the interval M was 100 mm (FIG. 4). The weavability in this example was good, the quality of the obtained tubular body was good, and the productivity was superior to that in Example 1.

[Example 4] Three shuttles were attached to a loom, and the hollow weave tubular body A for a bifurcated vascular prosthesis material shown in Fig. 5 was continuously manufactured. In parallel with this, a weaving part B different from the tubular body A was continuously manufactured. Of the warp yarns (2000 yarns) set on the loom, the warp yarn row E1 (600 yarns) that contributes to the formation of the main pipe portion A1 is opened by the jacquard device, and the shuttle C1 is operated to insert the weft yarn G1. Thus, the main pipe part A1 was manufactured. At this time, weaving was performed so that the length of the main pipe portion A1 was 200 mm.
In parallel with this, the warp yarn rows F1 and F2 (700 yarns) that do not contribute to the formation of the tubular body A are simultaneously opened by the jacquard device, and shuttles D1 and C2 / D2 are alternately operated. Weaving parts B1 and B2 were manufactured by inserting the wefts H1 and G2 / H2. The weaving parts B1 and B2 arranged on both sides of the tubular body A are made of wefts H1, G2 / H2.
Are connected and integrated (weaving section B). Then, the warp yarn rows E21 and E22 (300 yarns each) that contribute to the formation of the branch pipe portions A21 and A22 are opened by a jacquard device, respectively, and the shuttles C1 and C2 / D2 are respectively actuated to activate the weft yarns G1 and G2 / H2. Was inserted to manufacture branch pipe parts A21 and A22 continuous with the main pipe part A1. At this time, the length of the branch pipes A21 and A22 is 200
Weaving was performed so as to be mm. In addition, in parallel with this, the portion of the warp thread F1 that does not contribute to the formation of the tubular body A,
F2 (700 pieces each) was simultaneously opened by a jacquard device, and the shuttle D1 was operated to insert the weft H1 to manufacture a weaving section continuous with the weaving sections B1 and B2.

The above manufacturing procedure will be described by focusing on the operation of the shuttle. Shuttle C1, C2 / D at the start of weaving
When D and D1 are in the position shown in FIG. 5 (right side of the warp), step 1: The shuttle C1 is moved from the right side to the left side, and the weft G1 is inserted into the warp row E1. Step 2: The shuttle C2 / D2 is moved from the right side to the left side, and the weft yarn G2 / H2 is inserted into the warp yarn rows F2 and F1. Step 3: The shuttle C1 is moved from the left side to the right side, and the weft thread G1 is inserted into the warp thread row E1. Step 4: The shuttle C2 / D2 is moved from the left side to the right side, and the weft thread G2 / H2 is inserted into the warp thread rows F1 and F2. Step 5: The shuttle C1 is moved from the right side to the left side, and the weft thread G1 is inserted into the warp thread row E1. Step 6: The shuttle D1 is moved from the right side to the left side, and the weft yarn H1 is inserted into the warp yarn rows F2 and F1. Step 7: The shuttle C1 is moved from the left side to the right side, and the weft thread G1 is inserted into the warp thread row E1. Step 8: The shuttle D1 is moved from the left side to the right side, and the weft thread H1 is inserted into the warp thread rows F1 and F2. By repeating steps 1 to 8, the main pipe portion A1 and the weaving portion B were manufactured at the same time. Next, Step 9: The shuttle C1 is moved from the right side to the left side, and the weft thread G1 is inserted into the warp thread row E21. Step 10: The shuttle C2 / D2 is moved from the right side to the left side, and the weft yarn G2 / H2 is inserted into the warp yarn row E22. Step 11: The shuttle D1 is moved from the right side to the left side, and the weft yarn H1 is inserted into the warp yarn rows F2 and F1. Step 12: The shuttle C1 is moved from the left side to the right side, and the weft thread G1 is inserted into the warp thread row E21. Step 13: The shuttle C2 / D2 is moved from the left side to the right side, and the weft thread G2 / H2 is inserted into the warp thread row E22. Step 14: The shuttle D1 is moved from the left side to the right side, and the weft yarn H1 is inserted into the warp yarn rows F1 and F2. By repeating steps 9 to 14, the branch pipe A2
1, A22 and woven part B were produced simultaneously. By repeating Steps 1 to 8 and Steps 9 to 14 alternately and continuously, the tubular body A and the woven portion B were simultaneously and continuously manufactured. The two-branch vascular prosthesis hollow weave tubular body manufactured in this manner is cut at the switching portion between the main pipe portion A1 and the branch pipe portions A21 and A22, and further cut to a desired length according to the affected area, and put into practical use. Be served. The weavability in this example was good, and the quality of the obtained tubular body was also good.

[Embodiment 5] Two shuttles were provided and a hollow weave tubular body A for a bifurcated vascular prosthesis material shown in FIG. 6 was continuously manufactured. In parallel with this, a weaving part B other than the tubular body A was intermittently manufactured. In Example 4, the weft yarn H1 that contributes to the formation of the weaving portion B and the D1 that carries the weft yarn H1 are not used at all times, and the manufacture of the tubular body A is the same as in Example 4. That is, of the warp yarns (2000 yarns) set on the loom, the warp yarn row E1 (600 yarns) that contributes to the formation of the main pipe portion A1 is opened by the jacquard device, and the shuttle C1 is operated to change the weft yarn G1. The main pipe part A1 was manufactured by inserting. At this time, weaving was performed so that the length of the main pipe portion A1 was 200 mm. In parallel with this, the warp yarn rows F1 and F2 (700 yarns each) that do not contribute to the formation of the tubular body A are simultaneously opened by the jacquard device, and the shuttle C2 / D is operated to activate the weft yarn G2 / H. The weaving parts B1 and B2 were manufactured by inserting. Woven parts B1 and B arranged on both sides of the tubular body A
2 are connected by weft G2 / H and are integrated (weaving part B). Next, the warp yarn rows E21, E22 (300 yarns each) that contribute to the formation of the branch pipe portions A21, A22 are each opened by a jacquard device, and the shuttle C
1 and C2 / D are operated respectively and wefts G1 and G2 / H
The branch pipe parts A21 and A22 were manufactured by inserting.
At this time, weaving was performed so that the branch pipes A21 and A22 had a length of 200 mm. By performing the above alternately and continuously, the continuous tubular body A and the intermittent weaving section B are obtained.
Were manufactured at the same time. The weavability in this example was good, the quality of the obtained tubular body was also good, and the productivity was superior to that in Example 4.

[Comparative Example 1] One shuttle was provided to manufacture a straight type hollow woven tubular body A for vascular prosthesis material as shown in FIG. In Example 1, the weft yarn H that contributes to the formation of the weaving portion B and the D that carries the weft yarn H are not used, and the production of the tubular body A is the same as in Example 1. That is, of the warp (2000 yarns) set on the loom,
The warp thread E (600 yarns) that contributes to the formation of the tubular body A
Was opened by a jacquard device, and the shuttle C was operated to insert the weft yarn G, whereby the tubular body A was manufactured. In the present embodiment, the weftability is poor such that the warp yarn rows F1 and F2 in the portions that do not contribute to the formation of the tubular body A are loosened, and troubles such as yarn breakage and poor opening occur, and continuous weaving is possible. It was difficult. Moreover, the quality of the obtained tubular body was also inferior.

[Comparative Example 2] Two shuttles were provided, and a hollow weave tubular body A for a bifurcated vascular prosthesis material shown in FIG. 8 was manufactured. The tubular body A is manufactured in the same manner as in Example 5 except that the intermittent weaving section B is not manufactured in Example 5.
That is, of the warp yarns (2000 yarns) set in the loom, the warp yarn row E1 of the portion contributing to the formation of the main pipe portion A1
The main pipe portion A1 was manufactured by opening (600 pieces) with a jacquard device and operating the shuttle C1 to insert the weft thread G1. At this time, the length of the main pipe portion A1 is 200
Weaving was performed so as to be mm. At this time, the shuttle C2 was in a stopped state. Next, branch A2
1, warp rows E21, E2 of the portion that contributes to the formation of A22
2 (300 yarns each) is opened by a jacquard device, and shuttles C1 and C2 are activated to weft yarn G
The branch pipe parts A21 and A22 were manufactured by inserting 1 and G2. At this time, the length of the branch pipes A21 and A22 is 20
Weaving was performed so as to be 0 mm. In this embodiment, the warp yarn rows F1 and F that do not contribute to the formation of the tubular body A are formed.
2 and the weft thread G2 carried by the shuttle C2 in the suspended state was loosened, and problems such as thread breakage and poor shedding occurred, resulting in poor weavability and difficulty in continuous weaving. . Moreover, the quality of the obtained tubular body was also inferior.

[0033]

According to the present invention, the looseness of the warp yarn at the portion which does not contribute to the formation of the tubular body and the yarn breakage caused by it, which has been a problem in the conventional production of the hollow weave tubular body for a vascular prosthesis material by the jacquard system. It is possible to prevent troubles such as poor opening, and continuously weaving can be performed. The hollow weave tubular body for a vascular prosthesis material manufactured according to the present invention is excellent in quality without defects such as fluff.

[Brief description of drawings]

FIG. 1 is a hollow weave tubular body A and a weaving section B according to Example 1.
FIG. 6 is a plan view schematically showing a process for manufacturing a.

FIG. 2 is a perspective view schematically showing a state of the hollow weave tubular body A and the weaving portion B in FIG.

FIG. 3 is a hollow weave tubular body A and a weaving section B according to Example 2.
FIG. 6 is a plan view schematically showing a process for manufacturing a.

FIG. 4 is a hollow weave tubular body A and a weaving section B according to Example 3.
FIG. 6 is a plan view schematically showing a process for manufacturing a.

FIG. 5 is a tubular weave tubular body A and a weaving portion B according to Example 4.
FIG. 6 is a plan view schematically showing a process for manufacturing a.

FIG. 6 is a tubular weave tubular body A and a weaving portion B according to Example 5.
FIG. 6 is a plan view schematically showing a process for manufacturing a.

FIG. 7 is a plan view schematically showing a process of manufacturing a hollow weave tubular body A according to Comparative Example 1.

FIG. 8 is a plan view schematically showing a process of manufacturing a hollow weave tubular body A according to Comparative Example 2.

[Explanation of symbols]

A bag-weave tubular body B weaving part C shuttle W carrying weft G that contributes to formation of the bag-woven tubular body A a weft yarn that does not contribute to formation of the bag-woven tubular body A,
Shuttle E carrying weft H that contributes to formation of weaving portion B Warp row F of a portion that contributes to formation of tubular weave tubular body A Warp row G of portion that does not contribute to formation of tubular weave tubular body G Duvet weave tubular body A A weft thread H that does not contribute to the formation of the hollow weave tubular body A,
Weft I that contributes to formation of weaving section B Reed JK Cutting line L Length of weaving section B M Distance between weaving section B

Claims (3)

[Claims] 1. A method for producing a hollow weave tubular body A for a vascular prosthesis material by using a shuttle loom equipped with a jacquard device, wherein weft threads G are provided in a warp row E of a portion which contributes to the formation of the tubular body A. At least one shuttle C for insertion
And the weft H on the warp row F that does not contribute to the tubular body formation.
At least one shuttle D for inserting the bag is attached to the loom, and by operating these, a tubular body A and a woven portion B other than the tubular body A are formed at the same time. A method for manufacturing a woven tubular body. 2. The method for producing a hollow weave tubular body for a vascular prosthesis material according to claim 1, wherein a monofilament is used for the warp. 3. The method for producing a hollow weave tubular body for a vascular prosthesis according to claim 1, wherein a multifilament having a single yarn fineness of 5.5 to 50 dtex is used as the warp.