JPS62129053A - Wound treating material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wound dressing material for use in treating wounds of salivary mammals in which the covering surface of the skin and the skin tissue have been damaged.

Conventional technology Conventionally, wound surfaces have been treated using woven cotton fabrics, non-woven fabrics made of synthetic fibers, regenerated fibers, etc., which absorb exuded body fluids such as blood or lymph fluid from the wound surface and keep the wound surface in contact with the outside. It has been used to protect against the invasion of bacteria and bacteria.

However, these materials do not absorb much blood or exudate body fluid from the wound surface, and the rate of absorption and diffusion is also slow, resulting in a state in which a large amount of blood and exudate body fluid remains between the 01'' surface and the wound dressing material. As a result, there is no cooling effect due to the propagation of bacteria or the evaporation of exuded body fluids, which slows wound healing.

In order to improve these drawbacks, there is gauze coated with vaseline, but although this has improved adhesion, it is not sufficient. In addition, the presence of vaseline prevents the wound surface from drying and delays healing. Another method is to use release paper, oil paper, or non-adhesive fabric with low peeling resistance, by using it on gauze or by sandwiching it between the wound surface and gauze. A method of integrating a porous film layer and an absorbent fiber layer. (U.S. Patent No. 2923298, U.S. Patent No. 3285
No. 245, No. 3399672) and a method of gluing gauze and metal pieces together. (German publication details 14752955
No. 9, Swiss Patent Specification No. 1193469). A method of sewing together a moisture-impermeable layer and a water-absorbing fiber layer. (German Patent Specification No. 820179) have been proposed, but although they are all effective in preventing adhesion to the wound surface, they do not have water absorption or water permeability, and have low air permeability, so blood from the wound surface and Problems to be Solved by the Invention The present inventors have conducted extensive research to overcome these drawbacks of the conventional techniques, in which exuded body fluids such as body fluids and sweat from the skin near the wound surface accumulate, delaying healing. As a result of repeated efforts, we succeeded in developing a wound dressing material that has excellent absorbency of exuded body fluids such as blood and lymph from the wound surface, as well as sweat, promotes drying of the wound surface, accelerates healing, and has non-adhesive properties.

Means for Solving the Problems The present invention is a wound dressing material made of a fabric that has both water supply and water retention properties.

Hereinafter, the configuration of the present invention will be specifically explained.

The feature of the fabric as used in the present invention is that blood and lymph fluid is released from the wound surface when the skin covering part or skin tissue is damaged.

When body fluids such as sweat exude, these blood and exudate body fluids are absorbed by the fibers on the wound side, which have excellent water-retaining properties, and the fibers themselves do not try to retain the blood or exudate body fluids, but immediately become water-retentive. The fibers are transported to the side where the fibers have excellent properties. Fibers with excellent water retention absorb blood and exuded body fluids, diffuse them over the entire surface, and evaporate the water through ventilation and body heat. Due to these functions, almost no blood or exudate body fluids remain on the wound surface (.Therefore, they do not encourage the proliferation of bacteria or slow down the healing of the wound, and there is also a gap between the wound surface and the water-transferable fibers. Since there is almost no blood or exudate body fluid, it has excellent non-adhesive properties and when examining the healing status of the wound or removing wound dressing materials after healing, there is little resistance to peeling from the skin and not only does it not cause pain to the patient, but it also heals. There is no need to re-destroy the advanced wound surface.

The fiber group of the fabric according to the present invention with excellent water supply properties has a water test rate of 6.
It is necessary that it is 0% or more, and if it is less than 60%, the amount of blood and exudate body fluids that are carried into the fiber group with excellent water retention is small, and the blood and exudate body fluids remain on the wound surface, which is not preferable. In addition, the fiber group with excellent water retention properties placed on the other side needs to have a water retention rate of 50% or more. Blood and exuded body fluids remain on the wound surface because they are unable to retain sufficient body fluids and are not ringed or flow back to the fibers that have excellent water supply properties. Therefore, a fabric with a fiber group with a water retention rate of 60% or more arranged on one side and a fiber group with a water retention rate of 50% or more on the other side is used, and the water inspection rate of the fabric is 60%. By arranging and using the above-mentioned fiber group in contact with the wound surface, a wound dressing material with excellent non-adhesive properties that does not allow blood, exuded body fluids, sweat, etc. to remain on the wound surface can be obtained.

In the present invention, the water transfusion property and water retention property are defined as the ring strength and water retention rate measured by the following method.

KICe/Zo was placed on a glass plate as shown in Figure 1.

Water droplets are deposited at a ratio of Cm2, and the fabric 3 is placed on top of the water droplets. Furthermore, on top of that, layer a filter paper 4 of the same size as the cloth [Toyo Roshi (manufactured by Button, stable F paper N01 (-for membrane stabilization)] 59
/cm" load. In this state, 20℃, 60%
After being left in the atmosphere of Rl-1 for 60 minutes, the amount of water absorbed by the fabric 3 and filter paper 4 was measured, and the ring rate and water retention rate were determined by the following formula.

According to this method, the water-resistance property of the fibers becomes apparent, and if the fibers have good water-supplying properties, the fabric 3 does not absorb water, but a large amount of water moves to the filter paper 4. On the other hand, if the material has excellent water retention, a large amount of water is absorbed into the fabric 3 and less water is transferred to the filter paper 4. or,
The fabric has little water supply and water retention, so a lot of water remains on the glass plate]. In the present invention, a material with a water test rate of 60% or more is said to have water supply properties, and a water retention percentage of 50% or more is said to have water retention properties.

The fiber material used for the fabric of the present invention is not particularly limited and can be used as long as the ring ratio and water retention rate satisfy the values specified in the present invention. Synthetic fibers are used, and more preferably the thickness of the single yarn is 0.
．． The water detection rate can be increased by using fibers made of thin threads of 5 deniers or less, or by using hydrophobic synthetic fibers with an irregular cross section such as an L-shape, or porous.

Furthermore, in order to improve non-adhesiveness, it is preferable to use long fibers rather than fluffy short fibers or web-like fibers. An example of a fiber material with excellent water retention is cotton.

Fabrics with high water retention can be obtained by making fabrics using fibers that have water absorption properties such as cupra, rayon, and wool, or by mixing them with polyester, nylon, acrylic, etc.

In addition, the fabric having both water-supplying and water-retaining properties according to the present invention can be obtained by forming a fabric in advance from a water-testable fiber group and a water-retaining fiber group, and then laminating the fabric.

Specifically, a fabric made of a water-testable fiber group is applied to the wound surface, a fabric made of a water-retentive fiber group is layered on top of the fabric, and then a bandage or the like is fixed over the fabric. Alternatively, the fabrics may be laminated in two layers in advance, and the two overlapping fabrics may be sewn together using a sewing machine, or the two fabrics may be sewn together using adhesive resin, or the edges may be oversewn or piped. Laminated and integrated by disposing of cloth ends such as. In this way, the effects of the present invention can be obtained by preparing in advance fabrics that independently have water-supplying and water-retaining properties and laminating these fabrics.

The fabric may be either a woven fabric or a non-woven fabric, and the M-woven fabric is not particularly limited. Further, a more preferable fabric structure in the invention will be described.

A more preferable fabric structure is one in which a single piece of fabric has both water supply and water retention properties, and to obtain a fabric with such a structure, it is best to use a woven or knitted structure, such as a double structure, a triple structure, etc. It can be obtained by using a multi-layer weave, or even a single-layer weave using a satin weave in which many threads of one type are arranged on one side. Furthermore, in the case of knitted fabrics, knitted fabrics are knitted into double-sided fabrics and the yarns constituting one side are tuck-knitted, or knitted fabrics obtained by reducing the number of knits on the other side of the yarns constituting the side surfaces as much as possible. In addition, a core pile obtained using a pile knitting machine,
Turnip pile knitted fabric. It is a multilayered fabric such as a two-layer structure or a three-layer structure, such as a reversible knitted fabric by grating on a single knitting machine. One layer of the multilayer fabric has a fiber group with a water test rate of 6o% or more, and the other layer has a water retention rate of 50%.
By arranging the above Ii groups, the objective can be achieved. Among these, reversible knitted fabrics produced by brating using a single knitting machine are excellent in absorbing blood and exuded body fluids, have appropriate thickness and elasticity, and have excellent fit to wound surfaces.

Furthermore, there is no problem in adding a bactericidal agent such as acrinol or benzalkonium chloride or other chemicals to the fabric as necessary. Furthermore, the effects of the present invention will not be impaired even if a moisture permeable or moisture impermeable film is used in combination with the fabric. In addition, during use, depending on the amount of blood or exuded body fluid on the wound surface, the water-retaining surface is placed on the wound surface side, so that it can be quickly removed.

Furthermore, if it is undesirable to directly touch the wound surface with drugs, etc., the water-retaining surface can be placed on the wound surface and the water-testing surface can be impregnated with the drug, or a drug layer can be provided on the water-testing surface to prevent water-retention. It is also possible to gradually transfer the drug to the wound surface through the water-testable fiber group.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to examples, but the present invention is not limited to the following examples.

Example 1 Yarn A jersey was knitted using a circular knitting machine using a polyester raw yarn of 75D/24f. The water test rate was 659/m”.

The water retention rate was measured. The results were as follows.

Water test rate: 75.2% Water retention rate: 24.8% A cotton jersey was knitted using a circular knitting machine using yarn B, rayon yarn of 150D/40f. Weight: 140. ! Water test rate at 97m”
Water retention rate was measured. The results were as follows.

Water test rate: 35.2% Water retention rate: 64.8% A two-layer structure with polyester yarn on one side and rayon yarn on the other side using yarns A and B and brating technology on a single circular knitting machine. The knitted fabric was knitted. The basis weight was 160 g/m2. The fabric was scoured and dried in the usual manner. The basis weight was 2009/m2. For comparison, four layers of Japanese Pharmacopoeia gauze were prepared. Next, blood g collected from the mouse on a glass plate,
1 cc of the knitted fabric was dropped, and the polyester fiber side of the product of the present invention was placed on the blood side, and after being left for 60 seconds, the knitted fabric was removed, and the amount of blood remaining on the glass plate was observed. Furthermore, the removed knitted fabric was coated on both sides with P paper [manufactured by Toyo F Paper Co., Ltd., Stable F Paper N0I].
(-for membrane stabilization)], apply a load of 1 g/cm' with scissors,
After leaving the knitted fabric for 30 seconds, the blood transfusion and water retention properties of the knitted fabric were observed based on the colored area of the paper surface. In addition, in order to observe the peeling resistance, Q and l CC mouse blood was dropped onto a glass plate, the polyester fiber side was placed on the blood side, and the peeling resistance after being left for 2 hours was randomly selected from 5 women. Comparisons were made using sensory tests. Further, the fuzz on the glass plate after peeling was also observed in detail. Comparative gauze was also tested in the same manner. The results are shown in Table 1.

(Table 1) As shown in Example 1, the product of the present invention was demonstrated to have excellent absorbency for blood and exudate body fluids, and to have non-adhesive properties.

Example 2 Fabric + Iron A tricot knitted fabric was knitted using yarn of 66.20D/7f:1. The water supply rate and water retention rate were measured at a basis weight of 17 m''.The results were as follows.

Wakigun 63.2% Water retention rate 37.8% A nonwoven fabric of fabric B, nylon-6, was produced and the water supply rate and water retention rate were measured at a basis weight of 70 fi/m''.The results were as follows.

Water test rate: 60.0% Water retention rate: 40.0% Circular knit smooth was knitted using C fabric Cupra spun yarn No. 40/1. Water supply rate and water retention rate were measured at a basis weight of 120g7m2. The results were as follows.

Water test rate: 32.2% Water retention rate: 67.8% The above 13 fabrics A, B, and C were quilted with fabric B sandwiched between them. For comparison with the laminate of the product of the present invention, a four-layered Japanese Pharmacopoeia gauze was prepared and variously evaluated using the method shown in Example 1. The results are shown in Table 2.

(Hereinafter referred to as extra color) As shown in Example 2 in Table 2, the product of the present invention was demonstrated to have excellent absorbency for blood and exudate body fluids, and also to have non-adhesive properties.

Effects of the Invention The wound dressing material of the present invention has excellent absorbency of exuded body fluids such as blood and lymph from the wound surface and sweat, accelerates drying of the wound surface, accelerates healing, and has non-adhesive properties.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a method for measuring water transfusion and water retention properties of fabrics. 1...Glass plate, 2...Water drop, 3...Fabric, 4...
...P paper, 5...Load patent applicant Asahi Kasei Industries, Ltd. Figure 1

Claims (1)

[Claims] Wound dressing material made of fabric that has both water transport and water retention properties