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Warp-knitted fabric and medical material

A technology of warp knitted fabrics and medical materials, applied in the field of warp knitted fabrics and medical materials, can solve the problem that the mesh cannot fully follow the enlargement of organs

Active Publication Date: 2018-11-23
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for example, when using the mesh as a reinforcement material for sutures in surgical operations, there is a disadvantage that if the organ with the sutures grows slowly with the human body and becomes larger, the mesh cannot sufficiently follow the enlargement of the organ. change

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Warp-knitted fabric and medical material
  • Warp-knitted fabric and medical material
  • Warp-knitted fabric and medical material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0190] Examples are described below, but are not limited thereto.

[0191]

[0192] [Making of warp knitted fabric]

[0193] In the production of warp-knitted fabrics, first, yarns made of polylactic acid (Teijin, 33T12) as yarns made of bioabsorbable materials and yarns made of non-bioabsorbable materials are separated using a warping machine. Yarns made of polyethylene terephthalate (Toray, 33T12, type 262) were wound on the warp beam by the number of yarns used in the width. Next, the wound yarn is mounted on a knitting machine (tricot machine, 32 gauge, 120 courses), so that it passes through the spacer held by the yarn path and enters the yarn guide needle (reed).

[0194] The knitting machine uses 4 pieces of reed (GB1-4), and weaves so that it becomes a plain knitted fabric in the state of knitting (编み上がった). At this time, yarns are arranged so that two reeds (GB1, GB2) form a full set (FULL.SET), and the remaining reeds (GB3, GB4) are also arranged so that two piece...

Embodiment 10

[0208] The warp knitted fabric obtained in Example 1 was cut into 100mm×100mm, immersed in 1M NaOH aqueous solution at 60°C for 2 hours to degrade the PLA of the warp knitted fabric, washed with ultrapure water, and dried to prepare test samples. Next, cut into 60mm x 60mm, and use a twin-screw extruder (manufactured by Toyo Seiki Co., Ltd.) to perform a constant-speed biaxial simultaneous tensile test in the longitudinal direction (MD) and transverse direction (TD) until the length doubles. . Distance between chucks: 45mm, speed: 50mm / min, temperature: 37°C.

Embodiment 11

[0210] Except that the course of the knitting machine was changed to 60 courses, a warp knitted fabric was produced in the same manner as in Example 1, and a test sample was prepared in the same manner as in Example 10 using the obtained warp knitted fabric, and a constant speed biaxial Simultaneous tensile test.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention provides a warp-knitted fabric and a medical material that can be simultaneously extended in all directions by causing thread made of a second bioabsorbable material to be absorbed in a living body over time and in which the degree of extension can be increased. The present invention provides a warp-knitted fabric 10 in which adjacent loop rows are linked, the warp-knitted fabric 10 including: a plurality of first loop rows including a first thread and composed of continuous loops extending in the warp direction; and one or two or more second loop rows disposed between the first loop rows and composed of continuous loops extending in the warp direction, wherein each second loop row is formed of one or two or more loops solely including a second thread and one or two or more loops including the first thread, which are arranged alternately, at least three first loop rows are linked together by the first thread, and the bioabsorption rate of the first thread is lowerthan the bioabsorption rate of the second thread.

Description

technical field [0001] The present invention relates to a warp knitted fabric and a medical material, and more specifically, relates to a warp knitted fabric used in a living body in the medical field and a medical material using the same. The invention also relates to a method of sealing a blank, and a sealed blank. Background technique [0002] In the medical field, some blanks such as fabrics and braids are biocompatible, and their processing is relatively easy, so they are used as medical materials. [0003] In particular, in recent years, development of materials with higher functions has been underway for medical applications. [0004] For example, as such a material, a mesh used for an implantable sling is known (see Patent Document 1). The mesh is made by weaving a plurality of non-biodegradable transverse strands, a plurality of non-biodegradable longitudinal strands and biodegradable fibers arranged in a lattice shape. With the degradation of the biodegradable fi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04B21/00A61L27/48A61L27/52D04B21/16
CPCD04B21/00D04B21/16A61L27/48A61L27/52D10B2509/00D10B2509/08A61F2250/0031D10B2401/12D10B2403/0122D04B21/12D04B21/14A61F2/0063A61F2/0036A61F2002/0068A61L31/148
Inventor 根本慎太郎山田英明樱井润河野一辉伊东雅弥大西敦子
Owner TEIJIN LTD
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