阅读说明：本技术 一种大网孔疝修补补片及其编织方法 (Large mesh hernia repair patch and weaving method thereof ) 是由 奚敏敏 杜广武 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种大网孔疝修补补片,所述疝修补补片的结构为医用级聚丙烯单丝编织成的闭口三针经缎组织结构,所述闭口三针经缎组织结构在纵向上,其中一半纵行为大小线圈交替的结构且呈折线歪斜状态,另一半纵行为线圈大小均一的结构且呈现竖直的状态；在横向上,大小均一线圈与大小不均的线圈交替排列。本发明还提供一种大网孔疝修补补片编织方法。本发明提供的一种大网孔疝修补补片及其编织方法,具备大孔径、克重小的优点,能够满足物理性能要求。(The invention discloses a large-mesh hernia repair patch which is structurally a closed three-needle satin weave structure woven by medical polypropylene monofilaments, wherein one half of the closed three-needle satin weave structure is a structure with alternating large and small coils and is in a broken line skew state, and the other half of the closed three-needle satin weave structure is a structure with uniform coil size and is in a vertical state; in the horizontal direction, the uniform-size coils and the non-uniform-size coils are alternately arranged. The invention also provides a weaving method of the large mesh hernia repair patch. The large-mesh hernia repair patch and the weaving method thereof provided by the invention have the advantages of large aperture and small gram weight, and can meet the physical performance requirements.)

1. A large mesh hernia repair patch is characterized in that: the hernia repair patch is of a closed three-needle satin weave structure woven by medical polypropylene monofilaments, wherein one half of the closed three-needle satin weave structure is of a structure with alternating large and small coils and is in a zigzag state, and the other half of the closed three-needle satin weave structure is of a structure with uniform coil size and is in a vertical state; in the horizontal direction, the uniform-size coils and the non-uniform-size coils are alternately arranged.

2. The large mesh hernia repair patch according to claim 1, wherein the patch is made of a material selected from the group consisting of aluminum, copper, nickel, copper, aluminum, copperIs characterized in that: the porosity of the large-mesh hernia repair patch is 83-92%, and the unit area weight is 40g/m²～80g/m²The tensile breaking strength is 16-20N/cm.

3. The large mesh hernia repair patch according to claim 1, wherein: the medical grade polypropylene monofilament has the filament diameter of 0.014-0.016 inch.

4. The large mesh hernia repair patch according to claim 1, wherein: the spacing between adjacent longitudinal rows of the hernia repair patch structure is 2mm at the minimum and 4mm at the maximum, and the spacing between adjacent transverse rows is 1.1mm at the minimum and 3mm at the maximum.

5. The large mesh hernia repair patch according to claim 1, wherein: the spacing of the single-strand monofilaments on the large-mesh hernia repair patch after the single-strand monofilaments are formed into a fabric is kept to be more than 1 mm.

6. The large mesh hernia repair patch according to claim 1, wherein: the aperture size of the larger coil in the large-small coil alternating structure is 1.4-2.3 mm, and the aperture size of the smaller coil is 0.4-0.5 mm.

7. A weaving method of a large mesh hernia repair patch is characterized in that: weaving monofilaments on a warp knitting machine, using two guide bars, fully threading a front guide bar, threading a rear guide bar and hollowing the rear guide bar, making a closed three-needle satin weave by the two guide bars, and arranging yarns in opposite directions, wherein the longitudinal drawing density is 5.5-6.5 courses/cm, and the transverse density is 7-8 wales/cm.

8. The weaving method of the large mesh hernia repair patch according to claim 1, wherein: and cleaning and packaging the warp knitting structure after shaping, and sterilizing the warp knitting structure by ethylene oxide.

9. The weaving method of the large mesh hernia repair patch according to claim 1, wherein: the front guide bar warp feeding amount is 2080mm/rack, and the back guide bar warp feeding amount is 1900 mm/rack.

10. The weaving method of the large mesh hernia repair patch according to claim 1, wherein: the warp knitting machine has a drawing density of 11 loops/cm and a crimp density of 1900 loops/cm.

Technical Field

The invention relates to a large mesh hernia repair patch and a weaving method thereof, belonging to the technical field of medical products.

Background

The hernia patch repair is an operation method for treating hernia, and the operation needs to be carried out by means of artificially synthesizing the patch, so that tension generated by forcibly drawing and suturing anatomical layers of different structures is avoided. The clinically used repairing material is mostly woven by polypropylene materials, and has the following advantages: (1) soft, more resistant to bending and folding; (2) can be cut according to the required size; (3) the effect of stimulating the proliferation of fibrous tissues is more obvious, the aperture of the meshes is large, the fibrous tissues can grow and penetrate more easily, the connective tissues can be infiltrated easily, and the fibrous tissues can be embedded with the tissues at early stage; (4) the foreign body reaction is slight, patients have no obvious foreign body and discomfort, and the recurrence rate and complication incidence rate are low. (5) The patch is more resistant to infection, and granulation tissues can still proliferate in the meshes of the patch even in purulent infected wounds, so that the corrosion formation of the mesh is not caused; (6) the tensile strength is higher; (7) is not affected by water and most chemicals; (8) high temperature resistance, and can be boiled for disinfection; (9) the price is relatively cheap.

Research data have shown that after the patch is implanted into the body, internal and external granulation (scar tissue) may surround the woven monofilaments of the patch, and when the distance between the monofilaments is not wide enough, the mesh may be completely filled with scar tissue (closed pores), forming scar masses, causing discomfort to the patient, and causing the patch to collapse. It is necessary to have a sufficiently large mesh to prevent the occurrence of closed cells.

Disclosure of Invention

The invention aims to solve the technical problem of providing a large-mesh hernia repair patch which has the characteristics of large aperture and small gram weight and can meet the physical performance requirement and a weaving method thereof.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the large-mesh hernia repair patch is in a closed three-needle satin tissue structure woven by medical polypropylene monofilaments, wherein one half of the closed three-needle satin tissue structure is in a structure with alternating large and small coils and is in a broken line skew state, and the other half of the closed three-needle satin tissue structure is in a structure with uniform coil size and is in a vertical state; in the horizontal direction, the uniform-size coils and the non-uniform-size coils are alternately arranged.

The porosity of the large-mesh hernia repair patch is 83-92%, and the unit area weight is 40g/m²～80g/m²The tensile breaking strength is 16-20N/cm.

The medical grade polypropylene monofilament has the filament diameter of 0.014-0.016 inch.

The spacing between adjacent longitudinal rows of the hernia repair patch structure is 2mm at the minimum and 4mm at the maximum, and the spacing between adjacent transverse rows is 1.1mm at the minimum and 3mm at the maximum.

The spacing of the single-strand monofilaments on the large-mesh hernia repair patch after the single-strand monofilaments are formed into a fabric is kept to be more than 1 mm.

The aperture size of the larger coil in the large-small coil alternating structure is 1.4-2.3 mm, and the aperture size of the smaller coil is 0.4-0.5 mm.

A method for weaving a large-mesh hernia repair patch includes the steps of weaving monofilaments on a warp knitting machine, using two guide bars, fully threading a front guide bar, threading a rear guide bar and hollowing the rear guide bar, and making a closed three-needle warp satin structure by the two guide bars, wherein the directions of yarn laying are opposite, the longitudinal drawing density is 5.5-6.5 courses/cm, and the transverse density is 7-8 wales/cm.

And cleaning and packaging the warp knitting structure after shaping, and sterilizing the warp knitting structure by ethylene oxide.

The front guide bar warp feeding amount is 2080mm/rack, and the back guide bar warp feeding amount is 1900 mm/rack.

The warp knitting machine has a drawing density of 11 loops/cm and a crimp density of 1900 loops/cm.

The invention has the beneficial effects that: according to the large-mesh hernia repair patch and the weaving method thereof, the special structural design is adopted, the distribution and the size of the pore diameter are more reasonably arranged, and the requirement of clinical application on the effective porosity of the patch product is met; the aperture is larger, the distance between the used monofilaments after the monofilaments form a fabric is kept to be more than 1mm, the growth of local tissues is facilitated, and scar discs formed by the adhesion of scar tissues can be effectively avoided; the hernia repair patch has small gram weight, can reduce the foreign body sensation of a patient after being implanted into a human body, and has small risk of causing infection; the mechanical property of the hernia repair patch meets the requirement of the human body film covering pressure on the patch.

Drawings

FIG. 1 is a movement diagram of a gauze element in a large mesh hernia repair patch according to the present invention;

FIG. 2 is a schematic view showing the structure of a stitch in the double needle bed warp knitting machine of the present invention.

Detailed Description

The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.

The invention discloses a weaving method of a large mesh hernia repair patch, which adopts a specially designed warp knitting structure. The monofilament is medical grade polypropylene monofilament, and the diameter of the monofilament is 0.014-0.016 inch. On a warp knitting machine with the machine number of 12, two guide bars are used, the front guide bar is fully worn, the rear guide bar is worn and is empty, the two guide bars are in a closed three-needle satin weave, the yarn laying directions are opposite, and the requirement of small gram weight can be met. As shown in FIG. 1, the yarn laying numbers of the two guide bars, the front guide bar GB1 and the rear guide bar GB2 are respectively as follows: GB1 full penetration: 2-3, 1-2, 1-2, 1-0, 2-1; GB 21 crosses 1 empty: 1-0,2-1,2-3,1-2. The warp knitting machine had a draw density of 11 stitches/cm and a crimp density of 1900 stitches/cm.

In the invention, two guide bars form a loop together, the loop is stressed symmetrically and is vertical longitudinally; at the looping position of a single guide bar, the coil is in a regular inclined state longitudinally due to asymmetric stress. Vertical longitudinal movement, uniform stress of the coils and consistent size of the coils. The coil is not stressed uniformly and has different sizes when the coil is inclined and longitudinally moved. In order to make more coil aperture larger than 1.0mm, the difference between the let-off quantities of the empty guide bar and the full guide bar is increased, and the let-off quantity of the empty guide bar is reduced by increasing the let-off quantity of the full guide bar. The method specifically comprises the following steps: the front guide bar warp feeding amount is 2080mm/rack, and the back guide bar warp feeding amount is 1900 mm/rack.

The warp-knitted structure of which the spacing between adjacent wales is 2mm to 4mm at minimum and the spacing between adjacent courses is 1.1mm to 3mm at minimum can avoid scar tissue adhesion to form a scar disc, and the spacing of the used single-strand fibers after forming the fabric is kept above 1mm, so that the warp-knitted structure is beneficial to avoiding the growth of local tissues without forming the scar disc.

In order to realize the space size of adjacent wales, a warp knitting machine with the number of E12 is selected for weaving; in order to realize the space size of the adjacent rows, the drawing density is changed; the longitudinal drawing density is 5.5-6.5 horizontal rows/cm, and the transverse density is 7-8 longitudinal rows/cm.

And cleaning and packaging the warp-knitted structure after shaping, and sterilizing the warp-knitted structure by using ethylene oxide to prepare the large-mesh hernia repair patch.

The hernia repair patch is longitudinally provided with half of longitudinal rows which have the appearance of alternating coils with different sizes, the half of the longitudinal rows have uniform coil sizes, and the longitudinal rows of the coils with the different sizes are in a state of skew broken lines due to asymmetrical stress; the longitudinal coil with uniform coil size is stressed symmetrically, and the longitudinal coil is in a vertical state. In the horizontal direction, the uniform-sized coils and the non-uniform-sized coils are alternately arranged. Wherein, the aperture size of the bigger coil is 1.4-2.3 mm, and the aperture size of the smaller coil is 0.4-0.5 mm. The interval of the single-strand monofilament on the hernia repair patch is kept above 1mm after the single-strand monofilament is formed into a fabric, the porosity is 83-92 percent, and the weight per unit area is 40g/m²～80g/m²The tensile breaking strength is 16-20N/cm.

As shown in fig. 2, in order to realize the coil structure, the invention purchases three-needle closed-end satin tissue in the warp knitting tissue, wherein 1/2 coils are formed by two monofilaments together, and 1/2 coils are formed by a single monofilament; wherein the extension lines of 1/2 are two extension lines forming a cross and the extension lines of 1/2 are a single extension line.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.