WO2021014484A1 - Heat shrinkable tube and catheter - Google Patents

Heat shrinkable tube and catheter Download PDF

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Publication number
WO2021014484A1
WO2021014484A1 PCT/JP2019/028404 JP2019028404W WO2021014484A1 WO 2021014484 A1 WO2021014484 A1 WO 2021014484A1 JP 2019028404 W JP2019028404 W JP 2019028404W WO 2021014484 A1 WO2021014484 A1 WO 2021014484A1
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Prior art keywords
heat
shrinkable tube
inner layer
wire
catheter
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PCT/JP2019/028404
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French (fr)
Japanese (ja)
Inventor
優 八木
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朝日インテック株式会社
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Priority to JP2021534846A priority Critical patent/JP7159477B2/en
Priority to PCT/JP2019/028404 priority patent/WO2021014484A1/en
Publication of WO2021014484A1 publication Critical patent/WO2021014484A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/02—Thermal shrinking

Definitions

  • the present disclosure relates to heat shrink tubing and catheters.
  • Heat-shrinkable tubes that shrink mainly in the radial direction when heated are used as covering materials or reinforcing materials at joints and ends of electric wires, cables, etc., and are also used in the field of medical equipment.
  • Patent Document 1 discloses a heat-shrinkable tube having a hollow cylindrical shape as a whole and having a plurality of protrusions extending inward in the longitudinal direction on the inner circumference thereof.
  • An object of the present disclosure is to provide a technique capable of improving the bonding strength between a heat-shrinkable tube and a resin tube.
  • the heat-shrinkable tube has a cylindrical shape in which a plurality of strands are woven into a mesh pattern.
  • intersections of the plurality of strands may not be joined to each other.
  • intersections of the plurality of strands may be joined to each other.
  • the wire diameter of the wire may increase after shrinking.
  • the wire diameter of the wire may gradually change from the tip to the base end side.
  • the catheter according to one aspect of the present disclosure includes a tubular inner layer, a heat-shrinkable tube which is joined to the inner layer or the outer periphery of the inner layer, and a plurality of strands are woven into a mesh to form a cylindrical shape. It comprises an outer layer that covers the heat shrink tubing.
  • the inner layer or the outer layer may have two resins adjacent to each other along the longitudinal direction of the catheter, and the heat-shrinkable tube may be arranged so as to straddle the two resins.
  • FIG. 1 It is an external view of the heat shrink tube which concerns on embodiment of this disclosure, (a) shows the state before shrinkage, (b) shows the state after shrinkage. It is an end view of the heat-shrinkable tube 1 cut along II-II of FIG. 1 (b).
  • FIG. 1 is an external view of the heat-shrinkable tube 1 according to the embodiment of the present disclosure, (a) shows a state before shrinkage, and (b) shows a state after shrinkage.
  • FIG. 2 is an end view of the heat-shrinkable tube 1 cut along the line II-II of FIG. 1 (b).
  • the heat-shrinkable tube 1 has a cylindrical shape in which a plurality of first strands 11 and a plurality of second strands 12 are woven together in a mesh pattern. Each first wire 11 and each second wire 12 spirals around the axis of the heat-shrinkable tube 1.
  • the heat-shrinkable tube 1 contracts mainly in the radial direction when heated, and the diameters of the first wire 11 and the second wire 12 increase due to the shrinkage.
  • the intersections C of the first strands 11 and the second strands 12 are not joined to each other.
  • a resin material having heat shrinkage can be adopted as a material constituting each first wire 11 and each second wire 12.
  • the resin material is not particularly limited, and examples thereof include biocompatible resin materials such as polyamide resin and fluororesin.
  • a resin having a relatively high melting point for example, PEEK (polyetheretherketone), FEP (fluorinated ethylenepropylene), PTFE (polytetrafluoroethylene)
  • PEEK polyetheretherketone
  • FEP fluorinated ethylenepropylene
  • PTFE polytetrafluoroethylene
  • the wire diameters of the first wire 11 and the second wire 12 are preferably 0.03 to 0.50 mm before shrinkage and 0.04 to 0.60 mm after shrinkage, for example.
  • the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end.
  • the diameter of the heat-shrinkable tube 1 is, for example, 0.5 to 6.0 mm before shrinkage, 0.3 to 5.0 mm after shrinkage, and preferably 1.5 to 3.5 mm before shrinkage. It is preferably 1.0 to 3.0 mm after shrinkage.
  • the catheter 20 as an example to which the heat-shrinkable tube 1 is applied will be described.
  • the form to which the heat-shrinkable tube 1 is applied is not limited to the catheter 20, and examples thereof include a balloon catheter.
  • FIG. 3 is a schematic view of the catheter 20.
  • the catheter 20 is, for example, a catheter used for diagnosing or treating a stenosis or an occlusion.
  • the catheter 20 mainly includes a catheter shaft 30, a tip 40 joined to the tip of the catheter shaft 30, and a connector 50 joined to the rear end of the catheter shaft 30.
  • FIG. 4 is a partial cross-sectional view of the catheter shaft of part A in FIG.
  • the catheter shaft 30 has an inner layer 31, a heat-shrinkable tube 1, and an outer layer 32 in this order from the inside in the radial direction.
  • the inner layer 31 is made of a resin material, has a tubular shape, and has a lumen into which a guide wire or another catheter can be inserted.
  • the resin material forming the inner layer 31 is not particularly limited, but is preferably formed of a resin material having excellent slipperiness, and for example, PTFE is used.
  • the heat-shrinkable tube 1 functions as a reinforcing body, is located outside the inner layer 31, and bites into the inner layer 31. That is, the inner layer 31 has entered the opening M of the heat-shrinkable tube 1.
  • the inner layer 31 is softened by inserting the inner layer 31 into the heat-shrinkable tube 1 before shrinkage, heating the heat-shrinkable tube 1 and the inner layer 31, and shrinking the heat-shrinkable tube 1. Obtained by digging into.
  • the outer layer 32 is made of a resin material and covers the inner layer 31 and the heat-shrinkable tube 1.
  • the outer layer 32 enters the opening M of the heat-shrinkable tube 1 and covers the inner layer 31.
  • the resin material constituting the outer layer 32 is not particularly limited, and polyamide, polyamide elastomer, polyester, polyurethane and the like are used.
  • the heat-shrinkable tube 1 and the catheter 20 of the present disclosure since the heat-shrinkable tube 1 has a plurality of strands 11 and 12 woven into a mesh shape to form a cylindrical shape, the heat-shrinkable tube 1 is heat-shrinked before shrinkage.
  • the inner layer 31 By providing the inner layer 31 inside the tube 1 and contracting the heat-shrinkable tube 1, the inner layer enters the opening M of the heat-shrinkable tube 1.
  • the rigidity of the inner layer 31 can be improved, and the bonding strength between the inner layer 31 and the heat-shrinkable tube 1 can be improved.
  • the outer layer 32 also penetrates into the opening M of the heat-shrinkable tube 1, the bonding strength between the outer layer 32 and the inner layer 31 can be improved.
  • the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be improved.
  • the intersections C of the first strands 11 and the second strands 12 are not joined to each other, but as shown in FIG. 5, the first strands 11 and the intersections C of the second strands 12 are not joined to each other.
  • the intersection C of each of the second strands 12 may be joined to each other. Since the intersections C of the first strands 11 and the second strands 12 are joined to each other, the pitches between the plurality of first strands 11 and between the plurality of second strands 12 are kept constant. Since it can be shrunk in the state, the bonding strength with the inner layer 31 can be further improved.
  • the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end, but the first wire 11 and each second wire are substantially constant.
  • the wire diameter of the 2 wire 12 may gradually change from the tip to the base end side.
  • the wire diameters of the first wire 11 and the second wire 12 may gradually decrease from the tip to the base end side.
  • the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be gradually increased from the tip end to the base end side.
  • the heat-shrinkable tube 1 bites into the inner layer 31, but as shown in FIG. 7, the entire heat-shrinkable tube 1 may be covered with the inner layer 31.
  • the heat shrink tubing 1 may be arranged at the seam 33 between the inner layer 31 and the outer layer 32. That is, the heat-shrinkable tube 1 may be arranged so as to be sandwiched between the inner layer 31 and the outer layer 32.
  • the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the centers of the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33, but the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33.
  • the center may be located on the inner layer 31 side or the outer layer 32 side.
  • the inner layer 31 has a first resin 31A and a second resin 31B adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (first resin). It may be arranged so as to straddle 31A and the second resin 31B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the first resin 31A and the second resin 31B are made of different materials, and the first resin 31A located on the tip side of the second resin 31B is made of a material having higher flexibility than the second resin 31B.
  • the outer layer 32 has a third resin 32A and a fourth resin 32B that are adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (third resin). It may be arranged so as to straddle the 32A and the fourth resin 32B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the third resin 32A and the fourth resin 32B are made of different materials, and the third resin 32A located on the tip side of the fourth resin 32B is made of a material having higher flexibility than the fourth resin 32B.
  • each first wire 11 and each second wire 12 spirally extend around the axis of the heat-shrinkable tube 1, as shown in FIG.
  • a plurality of first strands 61 extending along the axial direction and a plurality of second strands 62 extending along the circumferential direction are woven into a mesh shape to form a cylindrical shape. May be.
  • the intersection of each of the first strands 61 and each of the second strands 62 may be in a non-bonded state or may be in a bonded state.
  • the shrinkage ratios of the first wire 61 and the second wire 62 may be the same or different.
  • first strands 11 and 61 and the second strands 12 and 62 are single-layer single wires, but they may be stranded wires or multiple layers.

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Abstract

Provided is a technology capable of improving bonding strength between a heat shrinkable tube and a resin tube.　This catheter is provided with: a tubular inner layer; a heat shrinkable tube that is bonded to an inside of the inner layer or the outer periphery of the inner layer, is formed of a plurality of element wires knitted in a net shape, and has a cylindrical shape; and an outer layer that covers the heat shrinkable tube.

Description

熱収縮チューブおよびカテーテルHeat shrink tubing and catheter
 本開示は、熱収縮チューブおよびカテーテルに関する。 The present disclosure relates to heat shrink tubing and catheters.
　加熱することで主に径方向に収縮する熱収縮チューブは、電線、ケーブル等の接合部や端部に被覆材または補強材として使用されており、医療機器の分野でも使用されている。 Heat-shrinkable tubes that shrink mainly in the radial direction when heated are used as covering materials or reinforcing materials at joints and ends of electric wires, cables, etc., and are also used in the field of medical equipment.
　例えば、特許文献１には、全体が中空円筒形状をなし、その内周に長手方向に延びに内方へ突出する複数の突起部が設けられた熱収縮チューブが開示されている。 For example, Patent Document 1 discloses a heat-shrinkable tube having a hollow cylindrical shape as a whole and having a plurality of protrusions extending inward in the longitudinal direction on the inner circumference thereof.
特開２００５－００１３３９号公報Japanese Unexamined Patent Publication No. 2005-001339
　しかし、特許文献１の開示された熱収縮チューブでは、複数の突起部が長手方向に沿って延びているため、長手方向における熱収縮チューブと樹脂チューブとの接合強度がそれほど高くない。 However, in the heat-shrinkable tube disclosed in Patent Document 1, since a plurality of protrusions extend along the longitudinal direction, the bonding strength between the heat-shrinkable tube and the resin tube in the longitudinal direction is not so high.
　本開示は、熱収縮チューブと樹脂チューブとの接合強度を向上させることができる技術を提供することを目的とする。 An object of the present disclosure is to provide a technique capable of improving the bonding strength between a heat-shrinkable tube and a resin tube.
 かかる目的を達成するために、本開示の一態様に係る熱収縮チューブは、複数の素線が網目状に編まれて、円筒状をなしている。 In order to achieve such an object, the heat-shrinkable tube according to one aspect of the present disclosure has a cylindrical shape in which a plurality of strands are woven into a mesh pattern.
　前記複数の素線の交差部は、互いに非接合状態であってもよい。 The intersections of the plurality of strands may not be joined to each other.
　前記複数の素線の交差部は、互いに接合状態であってもよい。 The intersections of the plurality of strands may be joined to each other.
　前記素線は、収縮後に素線径が増大してもよい。 The wire diameter of the wire may increase after shrinking.
　前記素線は、先端から基端側に向かって、素線径が徐変してもよい。 The wire diameter of the wire may gradually change from the tip to the base end side.
　本開示の一態様に係るカテーテルは、管状の内層と、前記内層内に又は前記内層の外周に接合され、複数の素線が網目状に編まれて、円筒状をなす熱収縮チューブと、前記熱収縮チューブを被覆する外層と、を備える。 The catheter according to one aspect of the present disclosure includes a tubular inner layer, a heat-shrinkable tube which is joined to the inner layer or the outer periphery of the inner layer, and a plurality of strands are woven into a mesh to form a cylindrical shape. It comprises an outer layer that covers the heat shrink tubing.
　前記前記内層または前記外層は、カテーテルの長手方向に沿って互いに隣り合う２つの樹脂を有し、前記熱収縮チューブは、前記２つの樹脂を跨ぐように配置されていてもよい。 The inner layer or the outer layer may have two resins adjacent to each other along the longitudinal direction of the catheter, and the heat-shrinkable tube may be arranged so as to straddle the two resins.
  本開示によれば、熱収縮チューブと樹脂チューブとの接合強度を向上させることができる技術を提供することができる。 According to the present disclosure, it is possible to provide a technique capable of improving the bonding strength between a heat-shrinkable tube and a resin tube.
本開示の実施形態に係る熱収縮チューブの外観図であり、（ａ）は収縮前の状態、（ｂ）は収縮後の状態を示している。It is an external view of the heat shrink tube which concerns on embodiment of this disclosure, (a) shows the state before shrinkage, (b) shows the state after shrinkage. 図１（ｂ）のＩＩ－ＩＩに沿って切断した熱収縮チューブ１の端面図である。It is an end view of the heat-shrinkable tube 1 cut along II-II of FIG. 1 (b). カテーテルの概略図である。It is a schematic diagram of a catheter. 図３のA部のカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the part A of FIG. 変形例に係る熱収縮チューブの素線間の接合状態を示す図である。It is a figure which shows the bonding state between the strands of the heat shrink tube which concerns on a modification. 変形例に係る熱収縮チューブを備えるカテーテルのカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the catheter provided with the heat shrink tube which concerns on a modification. 変形例に係るカテーテルのカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the catheter which concerns on the modification. 変形例に係るカテーテルのカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the catheter which concerns on the modification. 変形例に係るカテーテルのカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the catheter which concerns on the modification. 変形例に係るカテーテルのカテーテルシャフトの一部断面図である。It is a partial cross-sectional view of the catheter shaft of the catheter which concerns on the modification. 変形例に係る熱収縮チューブの外観図である。It is an external view of the heat shrink tube which concerns on the modification.
　以下、本開示の実施形態について、図面を参照しつつ説明する。なお、図面に示し熱収縮チューブの寸法は、実施内容の理解を容易にするために示した寸法であり、実際の寸法に対応するものではない。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be noted that the dimensions of the heat-shrinkable tube shown in the drawings are the dimensions shown for facilitating the understanding of the implementation contents, and do not correspond to the actual dimensions.
　図１は、本開示の実施形態に係る熱収縮チューブ１の外観図であり、（ａ）は収縮前の状態、（ｂ）は収縮後の状態を示している。図２は、図１（ｂ）のＩＩ－ＩＩ線に沿って切断した熱収縮チューブ１の端面図である。 FIG. 1 is an external view of the heat-shrinkable tube 1 according to the embodiment of the present disclosure, (a) shows a state before shrinkage, and (b) shows a state after shrinkage. FIG. 2 is an end view of the heat-shrinkable tube 1 cut along the line II-II of FIG. 1 (b).
　図１に示すように、熱収縮チューブ１は、複数の第１の素線１１および複数の第２の素線１２が、互いに網目状に編まれて、円筒状をなしている。各第１素線１１および各第２素線１２は、熱収縮チューブ１の軸の周りを螺旋状に延びている。熱収縮チューブ１は、加熱することで主に径方向に収縮し、各第１素線１１および各第２素線１２は、収縮によりそれらの素線径が増大する。図２に示すように、各第１素線１１および各第２素線１２の交差部Ｃは、互いに非接合状態である。 As shown in FIG. 1, the heat-shrinkable tube 1 has a cylindrical shape in which a plurality of first strands 11 and a plurality of second strands 12 are woven together in a mesh pattern. Each first wire 11 and each second wire 12 spirals around the axis of the heat-shrinkable tube 1. The heat-shrinkable tube 1 contracts mainly in the radial direction when heated, and the diameters of the first wire 11 and the second wire 12 increase due to the shrinkage. As shown in FIG. 2, the intersections C of the first strands 11 and the second strands 12 are not joined to each other.
　各第１素線１１および各第２素線１２を構成する材料としては、熱収縮性を有する樹脂材料を採用することができる。樹脂材料としては、特に限定されるものではないが、例えば、ポリアミド樹脂やフッ素樹脂等の生体適合性を有する樹脂材料が挙げられる。好ましくは、当該樹脂材料の中で融点が比較的高い樹脂（例えば、ＰＥＥＫ（ポリエーテルエーテルケトン）、ＦＥＰ（フッ化エチレンプロピレン）、ＰＴＦＥ（ポリテトラフルオロエチレン））が挙げられる。 As a material constituting each first wire 11 and each second wire 12, a resin material having heat shrinkage can be adopted. The resin material is not particularly limited, and examples thereof include biocompatible resin materials such as polyamide resin and fluororesin. Preferably, among the resin materials, a resin having a relatively high melting point (for example, PEEK (polyetheretherketone), FEP (fluorinated ethylenepropylene), PTFE (polytetrafluoroethylene)) can be mentioned.
　第１素線１１および第２素線１２の素線径は、例えば、収縮前は０．０３～０．５０ｍｍであり、収縮後は０．０４～０．６０ｍｍであることが好ましい。なお、本実施形態では、各第１素線１１および各第２素線１２の素線径は、それらの一端から他端まで略一定に構成されている。また、熱収縮チューブ１の直径は、例えば、収縮前は０．５～６．０ｍｍであり、収縮後は０．３～５．０ｍｍであり、好ましくは収縮前は１．５～３．５ｍｍであり、収縮後は１．０～３．０ｍｍであることが好ましい。 The wire diameters of the first wire 11 and the second wire 12 are preferably 0.03 to 0.50 mm before shrinkage and 0.04 to 0.60 mm after shrinkage, for example. In the present embodiment, the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end. The diameter of the heat-shrinkable tube 1 is, for example, 0.5 to 6.0 mm before shrinkage, 0.3 to 5.0 mm after shrinkage, and preferably 1.5 to 3.5 mm before shrinkage. It is preferably 1.0 to 3.0 mm after shrinkage.
　次に、熱収縮チューブ１が適用される一例としてのカテーテル２０について説明する。なお、熱収縮チューブ１が適用される形態はカテーテル２０に限らず、例えばバルーンカテーテルが挙げられる。 Next, the catheter 20 as an example to which the heat-shrinkable tube 1 is applied will be described. The form to which the heat-shrinkable tube 1 is applied is not limited to the catheter 20, and examples thereof include a balloon catheter.
　図３は、カテーテル２０の概略図である。 FIG. 3 is a schematic view of the catheter 20.
　カテーテル２０は、例えば、狭窄部又は閉塞部を診断又は治療するために用いられるカテーテルである。カテーテル２０は、主に、カテーテルシャフト３０と、カテーテルシャフト３０の先端に接合されたチップ４０と、カテーテルシャフト３０の後端に接合されたコネクタ５０とを備える。 The catheter 20 is, for example, a catheter used for diagnosing or treating a stenosis or an occlusion. The catheter 20 mainly includes a catheter shaft 30, a tip 40 joined to the tip of the catheter shaft 30, and a connector 50 joined to the rear end of the catheter shaft 30.
　図４は、図３のA部のカテーテルシャフトの一部断面図である。 FIG. 4 is a partial cross-sectional view of the catheter shaft of part A in FIG.
　図４に示すように、カテーテルシャフト３０は、半径方向の内側から順に、内層３１と、熱収縮チューブ１と、外層３２と、を有する。 As shown in FIG. 4, the catheter shaft 30 has an inner layer 31, a heat-shrinkable tube 1, and an outer layer 32 in this order from the inside in the radial direction.
　内層３１は、樹脂材料から構成されており、管状をなし、内部にガイドワイヤや他のカテーテルを挿入可能なルーメンを有する。内層３１を形成する樹脂材料は、特に限定されるものではないが、滑り性に優れた樹脂材料で形成されることが好ましく、例えばＰＴＦＥが用いられる。 The inner layer 31 is made of a resin material, has a tubular shape, and has a lumen into which a guide wire or another catheter can be inserted. The resin material forming the inner layer 31 is not particularly limited, but is preferably formed of a resin material having excellent slipperiness, and for example, PTFE is used.
　熱収縮チューブ１は、補強体として機能し、内層３１の外側に位置し、内層３１に対して食い込んでいる。すなわち、内層３１が熱収縮チューブ１の目開きＭに入り込んでいる。当該構成は、収縮前の熱収縮チューブ１に内層３１を挿入して、熱収縮チューブ１および内層３１を加熱して、熱収縮チューブ１を収縮させることにより、熱収縮チューブ１が軟化した内層３１に食い込むことにより得られる。 The heat-shrinkable tube 1 functions as a reinforcing body, is located outside the inner layer 31, and bites into the inner layer 31. That is, the inner layer 31 has entered the opening M of the heat-shrinkable tube 1. In this configuration, the inner layer 31 is softened by inserting the inner layer 31 into the heat-shrinkable tube 1 before shrinkage, heating the heat-shrinkable tube 1 and the inner layer 31, and shrinking the heat-shrinkable tube 1. Obtained by digging into.
　外層３２は、樹脂材料から構成されており、内層３１と熱収縮チューブ１とを被覆している。外層３２は、熱収縮チューブ１の目開きＭに入り込んで内層３１を被覆している。外層３２を構成する樹脂材料は、特に限定されるものではなく、ポリアミド、ポリアミドエラストマー、ポリエステル、ポリウレタン等が用いられる。 The outer layer 32 is made of a resin material and covers the inner layer 31 and the heat-shrinkable tube 1. The outer layer 32 enters the opening M of the heat-shrinkable tube 1 and covers the inner layer 31. The resin material constituting the outer layer 32 is not particularly limited, and polyamide, polyamide elastomer, polyester, polyurethane and the like are used.
  以上のように本開示の熱収縮チューブ１およびカテーテル２０によれば、熱収縮チューブ１は複数の素線１１、１２が網目状に編まれて円筒状をなしているので、収縮前の熱収縮チューブ１の内側に内層３１を設けて、熱収縮チューブ１を収縮させることにより、熱収縮チューブ１の目開きＭに内層が入り込む。これにより、内層３１の剛性を向上させることができると共に、内層３１と熱収縮チューブ１との接合強度を向上させることができる。外層３２も熱収縮チューブ１の目開きＭに入り込んでいるので、外層３２と内層３１との接合強度を向上させることができる。 As described above, according to the heat-shrinkable tube 1 and the catheter 20 of the present disclosure, since the heat-shrinkable tube 1 has a plurality of strands 11 and 12 woven into a mesh shape to form a cylindrical shape, the heat-shrinkable tube 1 is heat-shrinked before shrinkage. By providing the inner layer 31 inside the tube 1 and contracting the heat-shrinkable tube 1, the inner layer enters the opening M of the heat-shrinkable tube 1. As a result, the rigidity of the inner layer 31 can be improved, and the bonding strength between the inner layer 31 and the heat-shrinkable tube 1 can be improved. Since the outer layer 32 also penetrates into the opening M of the heat-shrinkable tube 1, the bonding strength between the outer layer 32 and the inner layer 31 can be improved.
　各第１素線１１および各第２素線１２の交差部Ｃは、互いに非接合状態であるので、熱収縮チューブ１は、より収縮しやすくなり、内層３１との接合強度をより向上させることができる。 Since the intersection C of each of the first strands 11 and each of the second strands 12 is in a non-bonded state with each other, the heat-shrinkable tube 1 is more likely to shrink, and the bonding strength with the inner layer 31 is further improved. Can be done.
　各第１素線１１および各第２素線１２は、収縮後に素線径が増大するので、熱収縮チューブ１を被覆した樹脂チューブ（内層３１および外層３２）の剛性を向上させることができる。 Since the wire diameter of each of the first wire 11 and the second wire 12 increases after shrinkage, the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be improved.
 以上、本開示の実施形態について述べてきたが、本開示は、これらの実施形態に限られるものではなく、種々の変形が可能である。 Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments, and various modifications are possible.
 例えば、上述の実施形態では、各第１素線１１および各第２素線１２の交差部Ｃは、互いに非接合状態であったが、図５に示すように、各第１素線１１および各第２素線１２の交差部Ｃは互いに接合状態であってもよい。各第１素線１１および各第２素線１２の交差部Ｃが互いに接合状態であることにより、複数の第１素線１１間および複数の第２素線１２間のピッチを一定に維持した状態で収縮させることができるため、内層３１との接合強度をより向上させることができる。 For example, in the above-described embodiment, the intersections C of the first strands 11 and the second strands 12 are not joined to each other, but as shown in FIG. 5, the first strands 11 and the intersections C of the second strands 12 are not joined to each other. The intersection C of each of the second strands 12 may be joined to each other. Since the intersections C of the first strands 11 and the second strands 12 are joined to each other, the pitches between the plurality of first strands 11 and between the plurality of second strands 12 are kept constant. Since it can be shrunk in the state, the bonding strength with the inner layer 31 can be further improved.
　上述の実施形態では、各第１素線１１および各第２素線１２の素線径は、それらの一端から他端まで略一定に構成されていたが、各第１素線１１および各第２素線１２の素線径は、先端から基端側に向かって徐変してもよい。例えば、図６に示すように各第１素線１１および各第２素線１２の素線径が、先端から基端側に向かって徐々に減少してもよい。これにより、熱収縮チューブ１を被覆した樹脂チューブ（内層３１および外層３２）の剛性を先端から基端側に向かって徐々に増加させることが可能となる。 In the above-described embodiment, the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end, but the first wire 11 and each second wire are substantially constant. The wire diameter of the 2 wire 12 may gradually change from the tip to the base end side. For example, as shown in FIG. 6, the wire diameters of the first wire 11 and the second wire 12 may gradually decrease from the tip to the base end side. As a result, the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be gradually increased from the tip end to the base end side.
　上述の実施形態では、熱収縮チューブ１は、内層３１に食い込んでいたが、図７に示すように、熱収縮チューブ１の全体が内層３１に被覆されてもよい。熱収縮チューブ１は、図８に示すように、内層３１と外層３２との継ぎ目３３に配置されてもよい。すなわち、熱収縮チューブ１は、内層３１および外層３２に挟まれるように配置されてもよい。これにより、材質の異なる樹脂間の接合硬度が向上し、カテーテルシャフト３０の破断および樹脂割れを抑制することができる。図８では、熱収縮チューブ１の各第１素線１１および各第２素線１２の中心は、継ぎ目３３上に位置しているが、各第１素線１１および各第２素線１２の中心は、内層３１側または外層３２側に位置していてもよい。 In the above-described embodiment, the heat-shrinkable tube 1 bites into the inner layer 31, but as shown in FIG. 7, the entire heat-shrinkable tube 1 may be covered with the inner layer 31. As shown in FIG. 8, the heat shrink tubing 1 may be arranged at the seam 33 between the inner layer 31 and the outer layer 32. That is, the heat-shrinkable tube 1 may be arranged so as to be sandwiched between the inner layer 31 and the outer layer 32. As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed. In FIG. 8, the centers of the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33, but the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33. The center may be located on the inner layer 31 side or the outer layer 32 side.
　図９に示すように、内層３１は、カテーテル２０の長手方向に沿って互いに隣り合う第１樹脂３１Ａと第２樹脂３１Ｂとを有し、熱収縮チューブ１は、当該２つの樹脂（第１樹脂３１Ａおよび第２樹脂３１Ｂ）に跨ぐように配置されていてもよい。これにより、材質の異なる樹脂間の接合硬度が向上し、カテーテルシャフト３０の破断および樹脂割れを抑制することができる。なお、第１樹脂３１Ａおよび第２樹脂３１Ｂは、互いに異なる材料から構成され、第２樹脂３１Ｂの先端側に位置する第１樹脂３１Ａは、第２樹脂３１Ｂよりも柔軟性の高い材料により構成される。 As shown in FIG. 9, the inner layer 31 has a first resin 31A and a second resin 31B adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (first resin). It may be arranged so as to straddle 31A and the second resin 31B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed. The first resin 31A and the second resin 31B are made of different materials, and the first resin 31A located on the tip side of the second resin 31B is made of a material having higher flexibility than the second resin 31B. To.
　図１０に示すように、外層３２は、カテーテル２０の長手方向に沿って互いに隣り合う第３樹脂３２Ａと第４樹脂３２Ｂとを有し、熱収縮チューブ１は、当該２つの樹脂（第３樹脂３２Ａおよび第４樹脂３２Ｂ）に跨ぐように配置されていてもよい。これにより、材質の異なる樹脂間の接合硬度が向上し、カテーテルシャフト３０の破断および樹脂割れを抑制することができる。なお、第３樹脂３２Ａおよび第４樹脂３２Ｂは、互いに異なる材料から構成され、第４樹脂３２Ｂの先端側に位置する第３樹脂３２Ａは、第４樹脂３２Ｂよりも柔軟性の高い材料により構成される。 As shown in FIG. 10, the outer layer 32 has a third resin 32A and a fourth resin 32B that are adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (third resin). It may be arranged so as to straddle the 32A and the fourth resin 32B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed. The third resin 32A and the fourth resin 32B are made of different materials, and the third resin 32A located on the tip side of the fourth resin 32B is made of a material having higher flexibility than the fourth resin 32B. To.
　上述の実施形態では、熱収縮チューブ１は、各第１素線１１および各第２素線１２は、熱収縮チューブ１の軸の周りを螺旋状に延びていたが、図１１に示すように、熱収縮チューブ６０は、軸方向に沿って延びる複数の第１素線６１と、円周方向に沿って延びる複数の第２素線６２とが、互いに網目状に編まれて円筒状をなしていてもよい。当該熱収縮チューブ６０において、各第１素線６１と各第２素線６２との交差部は、非接合状態であってもよいし、接合状態であってもよい。また、各第１素線６１および各第２素線６２の収縮率は同じであってもよいし、違ってもよい。 In the above-described embodiment, in the heat-shrinkable tube 1, each first wire 11 and each second wire 12 spirally extend around the axis of the heat-shrinkable tube 1, as shown in FIG. In the heat-shrinkable tube 60, a plurality of first strands 61 extending along the axial direction and a plurality of second strands 62 extending along the circumferential direction are woven into a mesh shape to form a cylindrical shape. May be. In the heat-shrinkable tube 60, the intersection of each of the first strands 61 and each of the second strands 62 may be in a non-bonded state or may be in a bonded state. Further, the shrinkage ratios of the first wire 61 and the second wire 62 may be the same or different.
　上述の実施形態では、各第１素線１１、６１、各第２素線１２、６２は、単層の単線であったが、撚線であってもよいし、多層であってもよい。 In the above-described embodiment, the first strands 11 and 61 and the second strands 12 and 62 are single-layer single wires, but they may be stranded wires or multiple layers.
１、６０：熱収縮チューブ、　１１、６１：第１素線、　１２、６２：第２素線、　３１：内層、　３１Ａ：第１樹脂、　３１Ｂ：第２樹脂、　３２：外層、　３２Ａ：第３樹脂、　３２Ｂ：第４樹脂、　３３：継ぎ目

  1, 60: Heat-shrinkable tube, 11, 61: 1st wire, 12, 62: 2nd wire, 31: Inner layer, 31A: 1st resin, 31B: 2nd resin, 32: Outer layer, 32A: 3rd Resin, 32B: 4th resin, 33: Seam

Claims (7)

  1. 　複数の素線が網目状に編まれて、円筒状をなす熱収縮チューブ。 A heat-shrinkable tube in which multiple strands are woven into a mesh to form a cylinder.
  2. 　前記複数の素線の交差部は、互いに非接合状態である、請求項１に記載の熱収縮チューブ。 The heat-shrinkable tube according to claim 1, wherein the intersections of the plurality of strands are not joined to each other.
  3. 　前記複数の素線の交差部は、互いに接合状態である、請求項１に記載の熱収縮チューブ。 The heat-shrinkable tube according to claim 1, wherein the intersections of the plurality of strands are joined to each other.
  4. 　前記素線は、収縮後に素線径が増大することを特徴とする、請求項１から請求項３のいずれかに記載の熱収縮チューブ。 The heat-shrinkable tube according to any one of claims 1 to 3, wherein the wire is characterized in that the diameter of the wire increases after shrinkage.
  5. 　前記素線は、一端から他端に向かって、素線径が徐変していることを特徴とする、請求項１から請求項３のいずれかに記載の熱収縮チューブ。 The heat-shrinkable tube according to any one of claims 1 to 3, characterized in that the wire diameter gradually changes from one end to the other end.
  6. 　管状の内層と、
    　前記内層内に又は前記内層の外周に接合され、複数の素線が網目状に編まれて、円筒状をなす熱収縮チューブと、
    　前記熱収縮チューブを被覆する外層と、を備えるカテーテル。     With a tubular inner layer,
    A heat-shrinkable tube that is joined to the inner layer or the outer circumference of the inner layer and has a plurality of strands woven into a mesh to form a cylindrical shape.
    A catheter comprising an outer layer covering the heat shrink tubing.
  7. 　前記内層または前記外層は、カテーテルの長手方向に沿って互いに隣り合う２つの樹脂を有し、
    　前記熱収縮チューブは、前記２つの樹脂を跨ぐように配置されている、請求項６に記載のカテーテル。

          The inner layer or the outer layer has two resins adjacent to each other along the longitudinal direction of the catheter.
    The catheter according to claim 6, wherein the heat-shrinkable tube is arranged so as to straddle the two resins.
PCT/JP2019/028404 2019-07-19 2019-07-19 Heat shrinkable tube and catheter WO2021014484A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000513072A (en) * 1996-06-18 2000-10-03 レイケム・リミテッド Wear protection
JP2010042115A (en) * 2008-08-11 2010-02-25 Hanako Medical Kk Medical tube with variable flexibility
JP2012070906A (en) * 2010-09-28 2012-04-12 Asahi Intecc Co Ltd Guide wire
CN104562425A (en) * 2014-12-26 2015-04-29 深圳市骏鼎达科技有限公司 Heat-shrinkable structure, sleeve, protective belt and heat-shrinkable structure producing method
JP2017113567A (en) * 2015-12-23 2017-06-29 バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. Multi-layered catheter shaft construction with embedded single axial sensors, and related methods
WO2017195580A1 (en) * 2016-05-10 2017-11-16 英孝 和田 Microcatheter
JP2018107986A (en) * 2016-12-28 2018-07-05 日本電設工業株式会社 Wire tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000513072A (en) * 1996-06-18 2000-10-03 レイケム・リミテッド Wear protection
JP2010042115A (en) * 2008-08-11 2010-02-25 Hanako Medical Kk Medical tube with variable flexibility
JP2012070906A (en) * 2010-09-28 2012-04-12 Asahi Intecc Co Ltd Guide wire
CN104562425A (en) * 2014-12-26 2015-04-29 深圳市骏鼎达科技有限公司 Heat-shrinkable structure, sleeve, protective belt and heat-shrinkable structure producing method
JP2017113567A (en) * 2015-12-23 2017-06-29 バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. Multi-layered catheter shaft construction with embedded single axial sensors, and related methods
WO2017195580A1 (en) * 2016-05-10 2017-11-16 英孝 和田 Microcatheter
JP2018107986A (en) * 2016-12-28 2018-07-05 日本電設工業株式会社 Wire tool

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