JPS59915Y2 - wound dressing material - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wound dressing material having appropriate water repellency and wettability.

In general, wound dressing materials are hygienic, drapeable (fits well to the wound), cushioning and protective, absorbent, moderately breathable, and spot-absorbent for blood, body fluids, etc. exuding from the wound, and at the same time can be sterilized using a general autoclave. It is desirable that the material has physical properties that allow it to be sterilized with ethylene oxide gas.

Various wound dressing materials have been proposed in the past. For example, a three-layer structure with a hydrophilic fiber layer as the inner layer and hydrophobic thermoplastic fiber layers as both outer layers, lightly needled on top of the three-layer structure, and a partially scarred material have been proposed. Wound dressing material fused and integrated (Jikko Sho 49)
-41653), wound dressings made by overlapping or wrapping absorbent materials such as gauze, absorbent cotton, and non-woven fabrics with a plastic mesh film and fusing them together in dots or lines (Utility Model Publication No. 49-10
395), but since the amount of blood and body fluids absorbed is proportional to the thickness of the former, if it is thin, it will drape well, but the amount of blood and body fluids absorbed will be poor; on the other hand, if it is thick, it will absorb less blood and body fluids. Although the amount is large, it has the disadvantage of poor drapability.

Furthermore, the latter has the disadvantage that it cannot withstand autoclave sterilization because the reticulated film is mainly made of polyethylene.

The present invention improves these shortcomings and has not only spot absorption that utilizes the difference in absorbency due to the different layer structure, but also drapability and breathability, and has excellent absorption capacity and autoclave sterilization resistance. It provides a covering material.

In the present invention, the absorbent body 2 made of hydrophilic fibers contains 30% by weight or more of thermoplastic synthetic fibers with a diameter of 3 tensile or less, and has a thickness of 0.
．． This wound dressing is wrapped and integrated with a nonwoven fabric with holes of 5 mm or less.

The drawings show the structure of the present invention; FIG. 1 is a partially cutaway perspective view of the wound dressing of the present invention, and FIG. 2 is a sectional view thereof.

The perforated nonwoven fabric 1 used as a cover material in the present invention is made of heat-sealable thermoplastic synthetic fibers such as polyester, polypropylene, or polyethylene fibers, or cotton or rayon to provide appropriate wettability. It is a perforated nonwoven fabric made of a mixture with hydrophilic fibers, etc., with emphasis on breathability and drapability.

When mixing hydrophilic fibers, the amount of thermoplastic synthetic fibers is 30% by weight or more, preferably 30 to 90% by weight based on the entire perforated nonwoven fabric.
It is desirable to set it as weight%.

Among thermoplastic synthetic fibers, polyethylene, polypropylene, and polyester fibers are superior in processability in that order, but polyester and polypropylene fibers are preferably used because they can withstand autoclave sterilization.

The fineness of the fibers constituting the perforated nonwoven fabric, both thermoplastic synthetic fibers and mixed hydrophilic fibers, is preferably 3 deniers or less, preferably 0.5 to 2.0, depending on drapability, skin irritation, etc. The fineness of the denier is excellent.

When the fineness is 3.0 denier or less, drapeability does not deteriorate even if the dressing material is made thicker, and it has the advantage of being easier to fit onto the affected area, and furthermore, the tips of the fibers become thin and flexible. Therefore, it has the advantage of being less irritating to the skin.

On the other hand, if a material with a diameter of 3.0 or more is used, it is undesirable because it causes irritation when the wound dressing is applied to the affected area.

This effect is particularly excellent when the fineness is 0.5 to 2.0 deniers,
When there is a large amount of body fluid to be absorbed, there is a great advantage when the thickness of the wound dressing is thick.With 2.0 to 3.0 denier, the drapability is slightly insufficient especially when it is thick, and the wound dressing is partially strong against the wound. The stimulation may become a little stronger.

On the other hand, if the fineness is less than 0.5 tenths of a ton, the fiber strength is low and the fuzz is likely to break or fall off, and the fuzz may adhere to the wound, causing a delay in wound healing.

The thickness, pore size, and porosity of the perforated nonwoven fabric are related to wettability, air permeability, drapability, and spot absorbency. 4
mm, the pore diameter is 0.2 to 2 mm, and the porosity is 10%.
-80%, preferably 30-70%.

The method for manufacturing perforated nonwoven fabric with the above performance is as follows:
From the viewpoint of hygiene, it is desirable to use a method that does not use adhesives, and there are dry methods, wet spunbond methods, fiber entanglement methods using high-pressure water jets as shown in Japanese Patent Application No. 50-30749, etc., but in particular, fiber-entangled nonwoven fabrics using high-pressure water jets are suitable for drape. Excellent properties and breathability.

The absorbent body 2 is made of hydrophilic fibers, and its material and form are not particularly limited as long as it is hygienic, bulky, and absorbent; A nonwoven fabric such as Tonrintar or a paper cotton laminate is used.

When non-woven fabric is used, there is less generation of shedding fibers, and especially in autoclave sterilization, formalin is applied to cellulose xanthate as shown in Japanese Patent Publication No. 1983-590 to delay regeneration, cutting is performed, and heat and pressure are applied in spots. A nonwoven fabric laminate made into a sheet by self-adhesion is excellent, and although the thickness of this laminate varies depending on the application, it is
A range of 1 to 5 mm is desirable in terms of body fluid absorption and drapability.

Next, the perforated nonwoven fabric 1 as a cover material and the absorbent body 2 are integrated by wrapping the absorbent body 2 with the perforated nonwoven fabric 1 and heat-sealing the overlapping portions of the perforated nonwoven fabric as shown in FIG. is preferred.

3 in FIGS. 1 and 2 indicates a heat seal joint.

The heat sealing temperature is 250° C. or higher when the thermoplastic synthetic fiber constituting the perforated nonwoven fabric is polyester fiber, 160° C. or higher when it is polypropylene fiber, and 130° C. or higher when it is polyethylene fiber.

Since the contact surface between the perforated nonwoven fabric 1 and the absorbent body 2 is not bonded to the wound dressing material integrated in this way, drapability is improved.
It has excellent breathability.

As explained above, since the wound dressing material of the present invention is completely covered with the perforated nonwoven fabric as a cover material on at least the upper and lower surfaces of the absorbent body, there is no generation of lint, and it has appropriate breathability. Moreover, it has the effect of being applied directly to a wound after normal sterilization, and can be easily peeled off from the wound due to its ability to absorb body fluids and blood and absorb spots.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the wound dressing material of the present invention, and FIG. 2 is a sectional view of the wound dressing material of the present invention. 1...Perforated nonwoven fabric, 2...Absorber.

Claims (1)

[Scope of utility model registration request] A wound dressing material in which an absorbent body made of hydrophilic fibers contains 30% by weight or more of thermoplastic synthetic fibers of 300 mL or less, and is wrapped and integrated with a perforated nonwoven fabric with a thickness of Q and 5 mm or less.