JP6902868B2 - Improved fabric with reinforced interlace - Google Patents

Description

The embodiments described herein relate to reinforced interlaces and fabrics with at least two different average pore dimensions made by at least two different stitching or weaving patterns. Boundaries with varying spacing between nodes are created. Reinforced interlace reinforces the larger pores in the interlace and helps reduce the potential risk of fraying or fraying.

Medical textiles have been used in numerous applications for both external and internal and transplant applications. Today, with advances in technology and increased health care costs, more medical and surgical procedures are being performed using minimally invasive technology. This includes the use of an endoscope or the like to see and examine the patient within the parameters of an endoscope or other minimally invasive device and to perform a surgical procedure on the patient.

In such applications, minimally invasive procedures require treatment instruments and other components capable of large compression. This is to allow the components to move through the catheter to the treatment site. In addition, the components must be designed to be unwound or otherwise decompressed to their original state to function as designed once they have reached a given position.

In this regard, many components of minimally invasive treatments are specifically adapted to meet the needs of specific treatments or instruments used for a given purpose. For example, in some diagnostic procedures, a capture device is used to enclose a tissue sample, and the encapsulated tissue sample is analyzed by the surgeon once it is withdrawn from the body. In all cases, the material must be very light in weight and relatively thin, or must be able to be compressed into a thin contour to move through the catheter. In addition, the components must be strong enough to function as designed so that their lightness does not diminish their integrity. These two properties are difficult to design so that each compromises the other. Fabrics designed to be strong are typically heavy and bulky. Conversely, fabrics that are light in weight and can take thin contours to move through the catheter are typically not strong and do not tolerate well under tension.

For the materials and textile components used in the minimally invasive applications, another problem is the problem of structural loosening or fraying. This is especially true for very open meshes or nets. It is not desirable to have loose threads or to loosen the fabric. Loose threads can block passages, for example, in applications relating to arterial or venous repair. In addition, loosening of textile components can impair structural integrity and, ultimately, the functioning of the components or devices.

One patent addresses the issue of fraying or fraying in US Pat. No. 5,456,711, entitled "Warped knitted Carotid Patch Having Finished Selvage Edges." The patent eliminates the need for cutting by providing a finished edge on a knitted mesh patch of a given width, thus eliminating the problem of fraying or loosening.

Provides a light weight fabric that works as designed and can take a thin contour to move through the catheter while maintaining a certain level of strength needed to prevent fraying or loosening of the yarn. Is desirable. The term fray as described herein absorbs tension from less concentrated interlacing or nodal areas and reduces the potential risk of seams loosening or unraveling more concentrated interlacing or nodal areas. Mention the capabilities of fabrics in.

In addition, it is desirable to provide a fabric that can be cut for manufacturing purposes and used in minimally invasive procedures that can reduce the potential risk of fraying or fraying.

The embodiments described herein relate to fabrics made by first interlacing of yarns in a first pattern and having a first fabric portion including first fabric pores having a first average pore size. The fabric further includes a second fabric portion made by second yarn interlacing in a second pattern and containing a second fabric pore with a second average pore size. The number of first interlaces of the yarn is greater than the number of second interlaces of the yarn. The first yarn interlacing enhances the integrity of the second fabric portion and reduces the potential risk of fraying.

The fabric of the embodiment described in the present application has a configuration in which the first fabric portion can surround the second fabric portion.

The fabrics of the embodiments described in the present application often have a difference in average pore size between the first fabric portion and the second fabric portion, the difference being at least 100%.

The fabrics of the embodiments described in the present application often have a weight difference between the first fabric portion and the second fabric portion, the difference being at least 50%.

The fabrics of the embodiments described in the present application often have a thickness difference between the first fabric portion and the second fabric portion, the difference being at least 10%.

The fabrics of the embodiments described in the present application often have a difference in burst strength between the first fabric portion and the second fabric portion, the difference being at least 50%.

The fabric of the embodiment described in the present application preferably has a difference in the number of interlaces between the first fabric portion and the second fabric portion, and the number of the first interlaces is the second interlacing. At least 50% more than the number of.

The fabric of the embodiment described in the present application preferably has a difference in the percentage of open area between the first fabric portion and the second fabric portion, and the percentage of the open area of the first fabric portion is said to be the first. 2 It should be about 7% smaller than the percentage of open area of the fabric portion.

The fabric of the embodiments described in the present application is preferably knitted or woven. The embodiments described in the present application are further made by the first interlacing of yarns in the first pattern to make a first fabric portion including a first fabric pore having a first average pore size and in a second pattern. A second fabric portion made by a second interlacing of the yarn and containing a second fabric pore having a second average pore size is made, and the number of first interlaces of the yarn is the second interlacing of the yarn. Provides a way to make reinforced mesh fabrics , more than the number of.

The objectives, features, and advantages of the embodiments described herein will become apparent when reading the following detailed description along with the drawings and claims.

It is a front view of the fabric of 1st Embodiment. It is a reduced view of the embodiment of FIG. 1A. It is an enlarged view of the Embodiment of FIG. 1A. It is a schematic diagram of FIG. 1C. It is an enlarged view of FIG. 1A at the boundary between the 1st pore and the 2nd pore along the lateral direction. It is a schematic diagram of FIG. 1E. It is an enlarged view of FIG. 1A at the boundary between the 1st pore and the 2nd pore along the vertical direction. It is a schematic diagram of FIG. 1G. It is an enlarged view of a typical first pore. It is an enlarged view of a typical second pore. It is a front view of the 2nd Embodiment. It is a diagram diagram of the threading layout for the embodiment of FIG. It is a diagram diagram of the guide bar movement for the embodiment of FIG. It is an enlarged view of FIG. It is a front view of the 3rd Embodiment. It is a front view of the 4th embodiment.

FIG. 1A shows a first embodiment of a first portion 12 and a second portion 14 with reference to a drawing in which the same number points to the same portion over several figures. The first embodiment is a knitted mesh made of human filament PET yarn. The first portion 12 is made using the first sewing pattern and forms the first pore 16. The second portion 14 is formed by using the second sewing pattern to form the second pore 18.

The specific sewing pattern used for the first embodiment 10 is shown as follows.

Information bar 1 = (2-1 / 1-2 / 2-10 / 1-2 / 2-2 / 2-3) x17 (2-1 / 1-0 / 1-3) x12

Information bar 2 = (1-2 / 2-1 / 1-3 / 2-1 / 1-2 / 2-1 / 1-0) x17 (1-2 / 2-3 / 2-1 / 1-0) ) x12

Information bar 3 = (2-1 / 1-0 / 1-2 / 2-3) x46

Information bar 4 = (1-2 / 2-3 / 2-1 / 1-0) x46

It should be noted that any number of sewing patterns can be used to make the fabrics described in the present application, and the above sewing patterns are not intended to limit the scope of embodiments in any way. Should be. As one of ordinary skill in the art will understand, the sewing pattern can be modified to make the fabric, where the dimensions and shape may need to be modified, but the functionality of the fabric remains substantially the same. FIG. 1B is a reduced view of the first embodiment 10 and shows the first portion 12 and the second portion 14. FIG. 1C is a further enlarged view of the first embodiment, and in particular, shows a corner where the first portion 12 and the second portion 12 meet at a boundary. FIG. 1D is a computer-generated diagram of FIG. 1C. FIG. 1E is an enlarged view of the first embodiment 10 at the boundary between the first portion 12 and the second portion 14 along the lateral direction. FIG. 1F is a computer-generated diagram of FIG. 1E. FIG. 1G is an enlarged view of the first embodiment at the boundary between the first portion 12 and the second portion 14 along the vertical direction. FIG. 1H is a computer-generated diagram of FIG. 1G.

Generally, pores are defined as openings created between the knitting pillars of the mesh. Each pillar consists of a loop formed by one needle. The space between the yarns in each knitting pillar is not considered to be the pores of the formed mesh described herein. FIG. 2A shows a typical first pore 16 formed by interlacing the first knitting pillar 20 of the first embodiment 10. FIG. 2B shows a typical second pore 18 formed by interlacing the second knitting pillar 22 of the first embodiment 10. As shown in FIG. 1, the first portion 12 surrounds the second portion 14, as indicated by the boundary line 15. The first portion 12 provides the second portion 14 by using reinforcing interlaces that act in opposition to each other to support the second portion 14 by providing additional points within the portion where the threads interlace. Encapsulate. The first part 12 of the additional interlace mitigates or prevents fraying by absorbing the cut thread or end and prevents further fraying by absorbing tension within the interlacing points or nodes, fraying. Prevents further fraying of the ends of the warp threads.

The first portion 12 has a higher density than the second portion 14 because the first pores 16 are smaller and the number of interlaces is greater over the fixed region. In the first embodiment 10, the number of interlaces in the first portion 12 is about 26 per inch (25.4 mm), whereas the number of interlaces in the second portion is 1 inch (25.4 mm). ) Is about 14. Therefore, the first portion 12 has a heavier weight than the second portion 14.

Several tests were performed on the first embodiment 10. The results are shown in Table A below.

Table C below provides elongation data for first portion 12 and second portion 14 of first embodiment 10 of pound (1 lb = 0.435 kg)) vs. elongation. As can be seen in the graph, the first part maintains integrity in a tense state for a longer period of time relative to the second part.

The second embodiment 24 provides different sewing patterns, as shown in FIG. The second embodiment 24 has a first portion having a first pore 27 and a second portion 28 having a second pore 29.

The sewing pattern adopted to make the second embodiment is as follows.

Information bar 1 = (1-0 / 0-1 / 1-0 / 0-1 / 1-2 / 2-1 / 1-2 / 2-1) x3 //

Information bar 2 = 0-1 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / 7-8 / 8-7 / 7-8 / 8-7 / 7- 6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 0-1 / 1-0 / 0-1 / 1-0 //

Information bar 3 = 8-7 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 0-1 / 1-0 / 0-1 / 1- 0 / 0-1 / 1-2 / 2-3 / 3-4 / 4-55-6 / 6-7 / 7-8 / 8-7 / 7-8 / 8-7 / 7-8 //

FIG. 4 is a diagram of the threading layout of the second embodiment 24.

FIG. 5 is a diagram of the movement of the guide bar according to the second embodiment 24. Finally, FIG. 6 is an enlarged view of a second embodiment 24 showing the first portion 26 and the second portion 28 in more detail. The first portion 26 has a pore size smaller than that of the second portion 28 and a larger number of interlaces or nodes. The second portion has less interlace than the first portion and has a larger pore size.

Regions with more interlaces or nodes can also act as visual or tactile aids at the boundaries between regions where the number of nodes varies. In production applications, this boundary helps the operator to efficiently or effectively attach the piece of fabric onto the frame or device, resulting in a higher quality product.

The use of more nodes as a visual and / or tactile aid can be incorporated into all aspects of production when fabrics with fewer nodes or fewer interlaces are steered onto a frame or other device. Reinforcing areas with more nodes help provide visual guidance to those who pass the fabric over wires or tubes. The higher interlacing area provides the operator with visual guidance to ensure that the pores are properly threaded and thus the quality of the product is higher.

Changes in the number of interlaces at a particular location on a given fabric can also provide visual aids to ensure that areas of lower density are properly oriented. The surgeon can see or feel the fabric and the pattern can determine if the mesh is properly oriented. When the mesh is properly oriented, the success rate of the procedure is increased and thus the patient's quality of life is improved.

The fabrics described in this application are applicable to both woven and knitted fabrics. For knitted fabrics, different sewing patterns can be used as required by the application. Sewing patterns and densities have a strong impact on strength, pore size, stability, and stretch knitting mesh quality. If it is necessary to change such properties, the sewing pattern and / or density will be changed.

7 and 8 show third and fourth embodiments in the woven structure. FIG. 7 discloses a third embodiment 30 having a first portion 32 with a tighter weave and more interlacing and nodal points. The second portion 34 of the third embodiment 30 has a larger open weave with fewer interlaces and nodal points. The first portion 32 of the third embodiment 30 has a 1,1 weave and the second portion 34 has a 2,2 weave. FIG. 6 also shows the weaving patterns of both the first portion 32 and the second portion 34.

FIG. 8 is another example 36 of the weaving embodiment, which provides a diagram of a fourth embodiment having a first portion 38 with a denser weave surrounding a second portion 40 of a larger open weave. As can be seen from FIG. 8 , the boundary between the first portion 38 and the second portion 40 is circular, but can be designed as desired to support the needs and functions of the fabric. Weaving patterns for the first portion 38 and the second portion 40 are also provided. The first portion 32 of the fourth embodiment 36 has a 1,1 weave and the second portion 34 has a 4,4 weave.

Another application of this embodiment is to create a fabric scaffold for intracellular growth. It is understood that intracellular growth can be promoted by constructing fabrics of various pore sizes. As a result, the fabric scaffold, thus its location on or within the fabric scaffold, can be designed so that the dimensions promote the growth of special cells.

It should also be understood that the knitting pattern presented in the present application is linear in shape and has a straight length and width. However, the applicant expects that the embodiments described above could also be made by knitting to the desired dimensions or width of a particular application. For example, if the resulting piece is desired to have a rhombus, the shape can be achieved either by cutting the shape into a sheet of fabric or by knitting the piece into the desired shape. Can be done. If the pieces are knitted, the knitting pattern will need to include a tapered portion to form a rhombus. It will be appreciated that any number of straight or curved shapes can be achieved, and that rhombuses are examples and are not intended to limit the scope of the embodiments described herein in any way.

Applicants are aware that there is at least one alternative method of making the embodiments disclosed in this application. Instead of changing the sewing pattern to make a fabric with varying numbers of interlacing, an alternative method is to apply tension to the less nodal area and then heat the fabric. The area of tension maintains its density while the remaining fabric shrinks or recedes, thus creating a greater number of nodes or interlaces. This method can be applied to the various embodiments described above.

As used herein, the singular forms "a", "an", and "the" also include multiple indications, unless they indicate that the context is clearly different. Thus, for example, "a yarn" or "a pore" means a single yarn or a single pore, or means more than one yarn or pore. Intended. Further, the use of terms such as "upper", "lower", "vertical", "horizontal", etc. in the specification is to describe the structure and function of the parts of the embodiments described herein with respect to each other. It is a term of convenience used in, and does not mean that it is interpreted as a term that limits it in any way.

12, 26, 32, 38 1st part 14, 28, 34, 40 2nd part 16, 27 1st pore 18, 29 2nd pore

Claims (14)

A first mesh knitting pattern having a large number of yarn knitting pillar stitches, wherein the first mesh knitting pattern having the first pore size constitutes a first number of nodes . It consists of a first mesh knitting pattern with first fabric pores made by interlacing, the first fabric pores are openings between the knitting pillar stitches of the first mesh knitting pattern, and each pillar stitching is The first fabric part, which consists of a loop formed by one needle,
A second mesh knitting pattern with knitting pillar stitching, made by the second interlacing of the large number of threads so as to form a second number of nodes in the second mesh knitting pattern having the second pore size. It consists of a second mesh knitting pattern having the obtained second fabric pores, the second fabric pores are openings between the knitting pillar stitches of the second mesh knitting pattern, and each pillar stitch is one stitch. Including, with a second fabric portion consisting of loops formed
The number of nodes in the first number is greater than the number of nodes in the second number.
The first pore size is smaller than the second pore size,
The reinforcing mesh boundaries of the large number of threads made between the first fabric portion and the second fabric portion are further included, and the reinforcing mesh boundaries constitute the large number of nodes so as to form a third number of nodes. Has a third interlacing of the yarn, the third number of nodes is more than the first number of nodes , and the third number of nodes is more than the second number of nodes. There are many fabrics. The fabric according to claim 1, wherein the first fabric portion surrounds the second fabric portion. The fabric according to claim 1, wherein the unit weight of the first fabric portion is at least 50% heavier than the unit weight of the second fabric portion. The fabric according to claim 1, wherein the thickness of the first fabric portion is at least 10% larger than the thickness of the second fabric portion. The fabric according to claim 1, wherein the ASTM D3786-06 burst strength of the first fabric portion is at least 50% greater than the ASTM D3786-06 burst strength of the second fabric portion. The fabric according to claim 1, wherein the first number of nodes in the first knitting pattern is at least 50% more than the second number of nodes in the second knitting pattern. The fabric according to claim 1, wherein the percentage of the open area of the first fabric portion is 7% smaller than the percentage of the open area of the second fabric portion. How to make a reinforced mesh fabric
Prepare a large number of threads,
A first mesh knitting pattern with knitting pillar stitching, made by the first interlacing of the large number of threads so as to form a first number of nodes in the first mesh knitting pattern having the first pore size. It consists of a first mesh knitting pattern having the obtained first fabric pores, the first fabric pores are openings between the knitting pillar stitches of the first mesh knitting pattern, and each pillar stitch is one stitch. Knit the first fabric part, consisting of the loops formed,
A second mesh knitting pattern with knitting pillar stitching, wherein the second interlacing of the large number of threads constitutes a second number of nodes in the second mesh knitting pattern having the second pore size. It consists of a second mesh knitting pattern having a second fabric pore made, the second fabric pores are openings between the knitting pillar stitches of the second mesh knitting pattern, and each pillar stitch is one stitch. Knit the second fabric part, which consists of loops formed by
The number of nodes in the first number is greater than the number of nodes in the second number.
The first pore size is smaller than the second pore size,
A reinforcing mesh boundary of the large number of yarns is knitted between the first fabric portion and the second fabric portion, and the reinforcing mesh boundary is the first of the large number of yarns so as to form a node of a third number. Reinforcement having 3 interlacing, the third number of nodes being more than the first number of nodes , and the third number of nodes being more than the second number of nodes. How to make a mesh fabric. The method of claim 8, wherein the first fabric portion surrounds the second fabric portion. The method of claim 8, wherein the unit weight of the first fabric portion is at least 50% greater than the unit weight of the second fabric portion. The method of claim 8, wherein the thickness of the first fabric portion is at least 10% greater than the thickness of the second fabric portion. The method of claim 8, wherein the ASTM D3786-06 burst strength of the first fabric portion is at least 50% greater than the ASTM D3786-06 burst strength of the second fabric portion. The method of claim 8, wherein the first number of nodes in the first knitting pattern is at least 50% more than the second number of nodes in the second knitting pattern. The method of claim 8, wherein the percentage of the open area of the first fabric portion is 7% less than the percentage of the open area of the second fabric portion.

Images