JPH02307446A - Rod-like spot absorptive material and preparation thereof - Google Patents

Abstract

PURPOSE:To obtain an absorptive material with little possibility of damaging an operated face and suitable for absorbing and removing spot-like liq. drops etc., by winding around an outer periphery of an assembly of crimped continuous filaments with a non-water-permeable tape and exposing the end of the assembly of the crimped continuous filaments from the end of the non-water-permeable tape. CONSTITUTION:A rod-like spot absorptive material is prepd. by winding around an outer periphery of an assembly 2 of continuous crimped filaments with a heat-shrinkable or a heat-meltable non-water-permeable tape 1 one end of which is coated with an insoluble adhesive paste 4, forming a continuous rod-like body by putting both ends of the tape together, cutting it into a specified length, heating at least one end face or one end part of the cut rod-like body to shrink or melt the non-water-permeable tape and exposing thereby an end part 3 of the assembly of the crimped filaments from the end of the non-water-permeable tape. As the soft end of the assembly of the crimped filaments is only brought into contact with an operating face, there is little possibility that the operating face is damaged. In addition, in taking a case when the material is left behind at the worst after operation into consideration, it is pref. that a filament wherein a contrasting substance is compounded is placed as an X-ray contrasting filament 5 to make it possible to detect easily it by an X-ray.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rod-shaped spot absorbent material for absorbing and removing localized bleeding during surgical operations, and a method for manufacturing the same.

(Prior art) Conventionally, cotton gauze formed into a rod shape has been used for the purpose of absorbing and removing localized bleeding during surgical operations, but shaping it into a rod shape is time-consuming and difficult. However, there was a problem in that absorbed blood adhered to the hands of the practitioner. Furthermore, it has been pointed out that there is a risk of an accident in which the cotton gauze is left inside the patient's body after the treatment.

(Problem to be solved by the invention) On the other hand, JP-A-63-92346, JP-A-63-152
No. 654, Utility Model No. 65-88515, Utility Model No. 59-1
67520 and Utility Model Application Publication No. 56-42224, etc., rod-shaped absorbent materials have been proposed, but all of them have a stone structure that absorbs liquid not only from the end surface of the rod but also from the rod-shaped body side f, making it difficult to perform treatment. The problem of absorbed blood, etc. adhering to the hands of people has not been solved.

Also, Utility Model No. 15-88316, Utility Model Application No. 59-21
Although each publication No. 778 proposes using a film with low water permeability as a part of the covering material, there is still a structure that absorbs liquid from the side of the absorbent material, and the above problems have not been solved. do not have.

In order to solve these problems, the inventors of the present invention particularly proposed in Japanese Patent Application Sho (Tokukai No. 89-27 request) that We proposed a rod-shaped absorbent material wrapped with water-impermeable tape.

The rod-shaped absorbent material does not cause constituent fibers to fall off to the treatment surface,
Localized bleeding, etc. can be absorbed and removed by contacting the end face of the rod-shaped absorbent material, and it is an excellent product that does not allow absorbed blood to adhere to the practitioner. Even if it did remain, it could be easily detected.

However, in this rod-shaped absorbent material, the length of the non-water permeable tape and the fiber aggregate are equal, and the end face of the fiber aggregate tends to become concave due to fiber contraction, so that the end of the non-water permeable tape touches the treatment surface during treatment. There was a fear of getting hurt.

(Means for Solving the Problems) The gist of the present invention is that a water-impermeable tape is wound around the outer periphery of a unidirectionally aligned crimped continuous fiber aggregate, and the overlapped portion of the water-impermeable tape is A rod-shaped spot absorbent material that is bonded with a water-insoluble glue and cut to a predetermined length, and the length of the non-water permeable tape is crimped by melting the wound non-water permeable tape over hot acid J11. The length of the crimped long fiber aggregate is shorter than the length of the long fiber aggregate, and the end of the crimped long fiber aggregate is exposed from the end of the non-water permeable tape. Because the end of the fiber aggregate protrudes and is exposed beyond the end of the non-water permeable tape, the end of the non-water permeable tape does not come into direct contact with the treatment surface, allowing it to be used as a spot with less risk of damaging the treatment surface. It is suitable for absorbing and removing a single drop of liquid.

The absorption principle of droplets is that droplets are absorbed by capillary action into a space made up of fibers arranged in almost one direction in the length direction, and the volume of the droplet holding space can be efficiently reduced. In order to ensure this, it is more effective to use crimped fibers, and from the zero lint-free surface, continuous fiber groups, ie, crimped long fiber aggregates, are most desirable.

As this crimped long fiber aggregate, crimped long NR fibers such as acetate, rayon, polyester, polypropylene, etc. can be used, but if the water-impermeable tape has heat-melting properties, It is more preferable to select one having a melting point higher than that of the water-impermeable tape.

In addition, the water-impermeable tape disposed on the outer surface in the longitudinal direction of the absorbent material of the present invention is a film tape made of polyester, polyethylene, polypropylene, etc. alone or in combination, and is heat-shrinkable or heat-fusible. However, it is more desirable to use a non-woven fabric made of polyester, polypropylene, etc., which is heat-shrinkable or heat-fusible and non-water permeable, from the viewpoint of morphological stability during bonding and tactile feel during use. Here, non-water permeable means substantially no water permeation, and refers to a water repellency of J-8P8137 of R7 or higher. In addition, as the glue for joining the overlapping parts of the tapes, it is desirable to use a water-insoluble glue in terms of stability during absorption and non-elution into the liquid. Gluing agents are preferred in terms of ease of handling. Furthermore, in consideration of the case where the absorbent material is left behind in the patient's body after one treatment, it can be easily detected by x in inside the crimped long fiber aggregate or on the surface of the crimped long fiber aggregate of the absorbent material of the present invention. In order to achieve this, it is extremely preferable to arrange a thread incorporating a contrast substance such as barium sulfate as an X-ray contrast thread. Further, the length of the absorbent material of the present invention is preferably 50 to 150 mm so that it can be easily handled with a vent touch.

The rod-shaped spot absorbent material of the present invention is produced by wrapping a water-impermeable heat-shrinkable or heat-melting tape coated with an insoluble glue on one end around the outer periphery of a continuous crimped long fiber aggregate, and then wrapping both ends of the tape. After forming a rod-shaped body that is continuously overlapped and then cut into a predetermined length, the crimp length is obtained by heating at least one end face or end of the cut rod-shaped body to astringent or melt the water-impermeable tape. It can be manufactured by exposing the end of the fiber aggregate to protrude from the end of the water-impermeable tape.

As a means for heating the end face or end portion of the cut rod-shaped body, a method such as short-term heating with a hydrogen flame or short-term contact with a heating plate or heating recess heated to a predetermined temperature is used.

In addition, in order to include the X-ray contrast thread in the collapsed long fiber aggregate,
It is also possible to insert the crimped long fibers inside the crimped filament aggregate.
! It can also be placed along the surface of the i-fiber aggregate, and it is added before or at the same time as the step of winding the water-impermeable tape.

(Effects of the Invention) With the above configuration, the rod-shaped spot absorbing material of the present invention does not cause constituent fibers to fall off to the treatment surface, easily absorbs and removes local bleeding etc. with a vent touch, and can be used for treatment. It is possible to provide a rod-shaped spot absorbent material that absorbs and adheres blood, etc. to patients, and even if the non-water permeable tape is hard, it does not come into direct contact with the treatment surface and is a soft crimped long fiber aggregate. Only the end of the thread comes into contact with the treatment surface, making it easier to use with less risk of damaging the treatment surface, and for those with X-ray contrast thread inserted, even if they remain in the body. Easy to detect.

(Example) Hereinafter, the present invention will be explained in more detail using examples.

Example 1 As a crimped long fiber aggregate, an acetate fiber having a single fiber fineness of 3 denier, a Y-shaped single fiber cross section, and a total denier of 54,000 denier has 2.5 crimps and 20 crimps.*
Using m-wound tow, this crimped tow is once uniformly spread, and then converged into a circular rod shape, and the outside of the crimped tow has a basis weight of 25?
/m", water repellency Re, width 52wm polypropylene spunbond nonwoven fabric tape is wound approximately once around, and the overlapping part is joined with an ethylene/vinyl acetate copolymer hot melt adhesive to form a continuous rod-shaped body. After that, it was cut to a length of 100 fins, and both end faces were heated by applying it to a recessed hot plate heated to 200°C. From Tok, a rod-shaped spot absorbent material having a side cross-sectional view shown in Fig. 1 was obtained. .

The length of the rod-shaped spot absorbent material obtained was 100 Ill.
l) did not change much after heating, but the polypropylene spunbond nonwoven fabric tape was heat-shrinked to a length of 96 μs, with the end of the crimped long fiber aggregate protruding from the end of the tape. there were.

FIG. 2 shows a cross-sectional view of the rod-shaped spot material.

This rod-shaped spot absorber has a diameter of 10+a+ and a weight of t.
o y / book, and the protruding ends of the willow curled filament aggregate were sufficiently soft, and when the water absorption ability was investigated by standing it vertically in a chalet filled with colored water to a depth of 5 filtration, it was found that It absorbed 4.22 ounces of water in one minute, and even when I lifted it with my fingers, the coloring on my fingers did not fade.

Example 2 U.S. Ronnie Co. No. X containing 61 wt% barium sulfate
The material of construction is the same as in Example 1, except that the radiographic contrast thread (diameter 0.65 m) is inserted when the crimped tow in Example 1 converges into a circular rod shape, as shown in the cross-sectional view of Fig. 3. A rod-shaped spot absorbent material like this was obtained. Its water absorption capacity is shown in Example 1
It was the same as what was obtained.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the rod-shaped spot absorbing material of the present invention;
figure,! FIG. 3 is an enlarged sectional view of the central part of the rod-shaped spot absorbing material of the present invention. DESCRIPTION OF SYMBOLS 1... Water-impermeable tape having heat-shrinkability or heat-melting properties, 2... crimped filament aggregate, 3... exposed end portion of crimped filament aggregate, 4... water Insoluble glue, 5...X
Linear contrast thread, L... Length of crimped long fiber aggregate, 2...
・Length of water-impermeable tape after heat treatment, 1. ...Length of the protrusion at the end of the crimped long fiber aggregate, d...Diameter of the rod-shaped spot absorbent Patent applicant Mitsubishi Rayon Co., Ltd.

Claims (4)

[Claims] (1) A heat-shrinkable or heat-meltable water-impermeable tape is wound around the outer periphery of a unidirectionally aligned crimped long fiber aggregate, and the overlapping portion of the water-impermeable tape is covered with a water-insoluble glue. It is a rod-shaped spot absorbent material made by joining and cutting to a predetermined length, and the wound non-water permeable tape is shrunk or melted so that the length of the non-water permeable tape is longer than the length of the crimped continuous fiber aggregate. A rod-shaped spot absorbent material that is short and has an end of the crimped long fiber aggregate exposed from the end of the non-water permeable tape. (2) The rod-shaped spot absorbent material according to claim 1, wherein the fiber aggregate contains X-ray contrast threads in the longitudinal direction. (3) A rod-shaped continuous crimped filament aggregate is wrapped around the outer periphery of a heat-shrinkable or heat-meltable water-impermeable tape coated with a water-insoluble glue on one end, and the both ends of the tape are overlapped and continuous. After forming a body and cutting it into a predetermined length, the ends of the fiber aggregate are heated by heating at least one end face or end of the cut rod-like body to shrink or melt the water-impermeable tape. A method for producing a rod-shaped spot absorbent material, characterized in that the rod-shaped spot absorbent material is exposed by protruding from the end of the non-water permeable tape. (4) The method for producing a rod-shaped spot absorbent material according to claim 3, wherein the X-ray contrast thread is supplied together with the crimped long fiber aggregate when forming the continuous rod-shaped bodies.