JP2006006637A - Absorbent cotton covered with net-like film made of synthetic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide covered absorbent cotton to be applied to a wound at the time of an operation to absorb blood and body fluid by covering absorbent cotton with a covering material, and a manufacturing method therefor. <P>SOLUTION: The absorbent cotton 20 in a rectangular sheet shape is covered by wrapping the opposing two sides of the absorbent cotton from the outer side with a polyethylene film 30 and vertically piling up the end parts 30a of the film on one side surface of the absorbent cotton 20. The vertically piled-up film end parts 30a are thermally welded with each other, the polyethylene films 30c adjacent to two sides 20b orthogonal to the opposing two sides of the absorbent cotton are thermally welded with each other, four sides of the absorbent cotton are sealed and the entire surface is covered with the polyethylene film. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coated absorbent cotton in which absorbent cotton is packaged with a covering material and applied to a wound at the time of surgery to absorb blood and body fluid and a method for producing the same.

  Conventionally, absorbent cotton has been widely used for medical purposes, but absorbent cotton itself has properties such as fluffing, fraying, and elongation, and when absorbent cotton is directly applied to the affected area, the absorbed blood or body fluid is solidified. Absorbent cotton also solidifies together. For this reason, absorbent cotton is wrapped with gauze and the overlapped part is crimped and joined.

The following Patent Document 1 is a patent publication for which the applicant has already filed a patent application, in which absorbent cotton is covered with gauze and integrated, and each of the fibers constituting the gauze and absorbent cotton is mechanically entangled with each other. An absorbent cotton with gauze in which a fiber suspension is sprayed and dried, and the bonding fibers are entangled and bonded to the respective fibers constituting the gauze and the absorbent cotton, and a method for producing the same is described. Absorbent cotton with gauze is not subject to unnecessary compression like needle punching in the manufacturing process, and is excellent in flexibility, elasticity, water absorption, etc., and can be manufactured at low cost by reducing equipment costs and running costs It has the feature that it can.
JP 2001-140152 A

  However, the absorbent cotton coated with gauze described in the above-mentioned Patent Document 1 is sprayed with a suspension of bonding fibers that are mechanically entangled with the fibers constituting the gauze and the absorbent cotton, dried, and the bonded fibers are gauze and absorbent cotton. The two sides covered with gauze do not expose the absorbent cotton, but the other two sides expose the absorbent cotton, and the gauze is also cut as it is. Since the thread that makes up the gauze frays easily during the handling process, and when the adsorbed blood and body fluid solidify, the loosened cotton and gauze loose thread that has come out solidifies and solidifies. There is a problem that it causes pain to the patient when they are peeled off from the human body.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a coated absorbent cotton in which absorbent cotton or gauze loose threads are solidified and do not adhere to a wound and a method for producing the same. To do.

  The present invention is intended to provide an absorbent cotton and a method for producing the absorbent cotton in which absorbent cotton and gauze frayed yarns are integrally solidified and do not adhere to the wound. The invention is such that a rectangular sheet-like absorbent cotton is wrapped with a synthetic resin net-like film so that the two opposite sides of the absorbent cotton are wrapped from the outside, and the ends of the film are superposed on one surface of the absorbent cotton. Covering and heat-welding the end portions of the upper and lower films to each other, heat-welding the synthetic resin net-like films adjacent to two sides orthogonal to the two opposite sides of the absorbent cotton, This is a cotton wool whose four sides are sealed and whose entire surface is covered with a synthetic resin net-like film.

  A second invention is the absorbent cotton covered with the synthetic resin net-like film according to the first invention, wherein the synthetic resin net-like film is a polyethylene or polypropylene film.

  According to a third invention, in the first invention, the synthetic resin net-like film is composed of a two-layer polyethylene film having an inner surface having a low melting point and an outer surface having a high melting point. Absorbent cotton coated with net-like film.

  4th invention is a manufacturing method which manufactures from the absorbent cotton roll which wound the strip-shaped absorbent cotton, and the synthetic resin net-like film roll to the absorbent cotton product covered with the synthetic resin-made net-like film, A step of cutting the absorbent cotton into a rectangular shape, a step of separating the cut absorbent cotton at a predetermined interval, and an absorbent cotton separated at the predetermined interval by using a synthetic resin net-like film, the two opposite sides of the absorbent cotton A step of covering the upper and lower layers so as to be wrapped from the outside, a step of thermally welding the end portions of the upper and lower layers, and a synthetic resin net-like film adjacent to two opposite sides of the absorbent cotton A step of heat-welding each other, and a step of separating the heat-welded portions of the synthetic resin-made net-like films at substantially the middle portion thereof, the four sides of the cut absorbent cotton Was Lumpur, a method of manufacturing a cotton wool that covers the entire surface of a synthetic resin net-like film.

  As described above, according to the first aspect of the present invention, a rectangular sheet-like absorbent cotton is wrapped with a synthetic resin net-like film so that two opposite sides of the absorbent cotton are wrapped from the outside, and the end of the film is placed on one side of the absorbent cotton. Synthetic resin net-like films adjacent to two sides perpendicular to the two opposite sides of the absorbent cotton, with the upper and lower layers overlapped and covered on the surface, and the end portions of the upper and lower layers are thermally welded together. Since the absorbent cotton is heat-sealed, the four sides of the absorbent cotton are sealed, and the entire surface is coated with a synthetic resin net-like film, the entire surface of the absorbent cotton is covered with the synthetic resin net-like film without exposing the absorbent cotton. In addition, like the gauze that has been cut, the thread that makes up the loosenage in the process of handling frays and falls off, or solidifies together with the adsorbed blood and body fluid to adhere to the wound , Is not that bring pain to the patient when peeled off from the human body a record. In addition, the level difference due to the overlapping of the synthetic resin net-like film formed on the surface of the absorbent cotton is reduced, and the usability is improved.

  The second invention is absorbent cotton coated with a synthetic resin net-like film characterized in that the synthetic resin net-like film in the first invention is a polyethylene or polypropylene film, which is harmful to the human body. A sanitary coated absorbent cotton can be obtained.

  According to a third invention, in the first invention, the synthetic resin net-like film is composed of a two-layer polyethylene film having an inner surface having a low melting point and an outer surface having a high melting point. Since the absorbent cotton is coated with a net-like film, the welding operation is easy and a stable coated absorbent cotton with high productivity can be obtained.

  4th invention is a manufacturing method which manufactures from the absorbent cotton roll which wound the strip-shaped absorbent cotton, and the synthetic resin net-like film roll to the absorbent cotton product covered with the synthetic resin-made net-like film, A step of cutting the absorbent cotton into a rectangular shape, a step of separating the cut absorbent cotton at a predetermined interval, and an absorbent cotton separated at the predetermined interval by using a synthetic resin net-like film, the two opposite sides of the absorbent cotton A step of covering the outer side of the absorbent cotton so as to be wrapped from above and below, a step of thermally welding the end portions of the upper and lower layers, and a composition adjacent to two opposite sides of the absorbent cotton. The step of heat-welding the resin net-like films and the step of separating the portions where the synthetic resin-made net-like films are heat-welded at substantially the middle portion thereof, and being cut Sealing the four sides of Aburawata, because it is absorbent cotton manufacturing method of coating the entire surface with a synthetic resin net-like film, Hakare automation of production, it is possible to obtain a coating absorbent cotton quality at low cost.

  FIG. 1 is an explanatory view of an absorbent cotton coated with a polyethylene film according to an embodiment of the present invention, and FIG. 1 (A) is a perspective view. FIG. (B) is an NN sectional view in FIG. (A), and FIG. (C) is an MM sectional view in FIG.

  In FIG. 1, 10 is an explanatory diagram of a finished product in which absorbent cotton 20 is covered with a polyethylene film 30. A rectangular sheet-like absorbent cotton 20 is covered with a polyethylene film 30 so that two opposite sides 20a of the absorbent cotton are wrapped from the outside, and an end portion 30a of the polyethylene film is overlaid on one surface of the absorbent cotton, The ends of the stacked films are heat-welded to each other (30b), and the polyethylene film 30c adjacent to the two sides 20b perpendicular to the two opposite sides 20a of the absorbent cotton is heat-welded (30d) Then, all four sides of the absorbent cotton are sealed, and the entire surface of the absorbent cotton is covered with a polyethylene film.

  The polyethylene film 30 is composed of two layers having a large number of pores whose inner surface has a low melting point and whose outer surface has a high melting point. A large number of pores are formed by superposing polyethylene films and joining them, and then forming minute slits and applying tension in two orthogonal directions.

  As described above, the absorbent cotton covered with the polyethylene film according to the present embodiment is sealed with the four sides of the absorbent cotton, and the entire surface of the absorbent cotton is covered with the polyethylene film, so that the absorbent cotton is not exposed and is cut. Like the gauze as it is, the gauze-forming thread frays and falls off in the process of handling, or solidifies together with the adsorbed blood and body fluid and adheres to the wound so that it can be removed from the human body. There is no pain to the patient when peeling. Further, the polyethylene film is not harmful to the human body and can provide a sanitary absorbent cotton.

  The covering material of absorbent cotton in the present embodiment is not limited to a two-layer polyethylene film, but a one-layer polyethylene film or polypropylene film, a nonwoven fabric made of polyethylene or polypropylene, and a nonwoven fabric in which polyester is added thereto Any other materials that are approved for medical use and have heat-welding properties may be used. The net shape means innumerable minute holes provided and has ventilation and water permeability, and the size and shape of the ventilation and water passage holes are not limited, and the periphery of the holes is raised like a bank. However, irregularities may be provided in other portions.

  FIG. 2 is an explanatory view of a manufacturing apparatus and a manufacturing method for absorbent cotton coated with a polyethylene film according to an embodiment of the present invention. In FIG. 2, 21 is an absorbent cotton roll in which absorbent cotton is wound around a roller arranged in the first step of the production line, and 31 is a polyethylene film roll in which a polyethylene film is wound around the roller. 110 is a first conveyor composed of conveyor rollers 111 and 112 and a belt 115, and pressing rollers 113 and 114 for pressing absorbent cotton are provided directly above the conveyor rollers 111 and 112 on the upper side of the first conveyor roller. The roller 112 is driven by a drive motor (not shown).

  Reference numeral 120 denotes a second conveyor composed of conveyor rollers 121 and 122 and a belt 124. A pressing roller 123 for pressing the absorbent cotton is provided on the second conveyor immediately above the conveyor roller 121. The conveyor roller 122 is a drive (not shown). It is driven by a motor.

  A third conveyor 130 includes conveyor rollers 131 and 132 and a belt 135. On the third conveyor, pressing rollers 133 and 134 for pressing the absorbent cotton 22 after cutting are provided immediately above the conveyor rollers 131 and 132, respectively. The conveyor roller 132 is driven by a drive motor (not shown). A spacer 125 is provided between the second conveyor 120 and the third conveyor 130, and prevents the absorbent cotton 22 from slipping and falling between the second conveyor and the third conveyor.

  Reference numeral 150 denotes a rotary cutter for cutting the strip-shaped absorbent cotton 20 provided between the first conveyor 110 and the second conveyor 120 into a predetermined length. Reference numeral 151 denotes a cutter receiving plate provided on the lower side, and has a function of preventing the absorbent cotton from slipping and falling between the first conveyor 110 and the second conveyor 120.

  Reference numeral 140 denotes a covering guide plate for covering the absorbent cotton with the polyethylene film, and its detailed shape is shown in FIG. Fig. (A) is a plan view, Fig. (B) is a front view, and Fig. (C) is a side view. In FIG. 3, a guide plate 140 is formed of an aluminum plate, a stainless plate, or the like, and is introduced from below through a guide roller 144 (see FIG. 2), an introduction portion 141 for introducing a polyethylene film, and a triangular guide in plan view. Part 142 and a rectangular discharge port part 143 in side view.

  Reference numeral 180 denotes a fourth conveyor which is composed of three rollers 181, 182 and 183 and a belt 184 and is provided at the final stage of the production line. The conveyor roller 182 is driven by a drive motor (not shown).

  Reference numeral 190 denotes a disk-shaped heat roller for heat-welding the overlapped portions of the overlapped polyethylene films, which also functions as a pressing roller and is provided immediately above the conveyor roller 181. Reference numeral 160 denotes a transmissive optical sensor for detecting the interval (gap) between the coated absorbent cotton and the absorbent cotton, and is composed of an upper light emitting portion 161 and a lower light receiving portion 162.

  Reference numeral 170 denotes a high-frequency sealer with a cutting function that welds and separates polyethylene films at an interval (gap) between the absorbent cotton and the absorbent cotton, and descends in synchronization with detection of the interval (gap) between the absorbent cotton and the absorbent cotton of the transmission optical sensor. Then, polyethylene film is welded, cut and separated.

  The first conveyor 110 and the second conveyor 120 are synchronized and driven at the same speed, and the strip-shaped absorbent cotton 20 on the conveyor moves on the belts of both the conveyors 110 and 120 at the same speed. The third conveyor 130 is driven at a higher speed than the first and second conveyors 110 and 120, and the fourth conveyor 180 is driven at the same speed as the third conveyor 130 in synchronization with the third conveyor 130. Further, the distance from the rotary cutter 150 to the conveyor roller 131 of the third conveyor, that is, the pressing roller 133 is set so as to coincide with the cutting size of the absorbent cotton.

  For this reason, the absorbent cotton 22 cut by the rotary cutter 150 is transferred from the second conveyor 120 to the third conveyor 130 having a high moving speed immediately after cutting, and after changing to the third conveyor 130, the front and rear The interval between the absorbent cottons gradually increases, and when the next cutting is started, a predetermined interval (gap) is secured between the front and rear absorbent cottons. When the length of absorbent cotton is Lcm, the distance between the front and rear absorbent cotton (gap) is Hcm, and the speed of the first and second conveyors is 1, the speed of the third and fourth conveyors is (1 + H / L) times The speed is set. Thereby, the space | interval (gap) of the absorbent cotton and absorbent cotton which moves on a 3rd conveyor becomes Hcm, and each absorbent cotton is coat | covered with a polyethylene film with this clearance gap. Thereby, since each conveyor is continuously operated at a constant speed without intermittent movement, a product with stable quality can be obtained. In order to manufacture products with different absorbent cotton lengths with the same manufacturing apparatus, the spacer 125 between the second conveyor 120 and the third conveyor 130 is changed to one having a different size, and the high-frequency sealer 170 or the transmission optical sensor 160 is moved. The interval may be changed.

  In addition, when the absorbent cotton 22 is transferred from the second conveyor 120 to the third conveyor 130, when the absorbent cotton slips on the third conveyor, the speed of the third conveyor 130 and the second conveyor 120 is estimated in consideration of the slip amount. The difference may be increased, and if the pressing force of the pressing roller 133 is larger than the pressing force of the pressing roller 123 of the second conveyor, slipping of the absorbent cotton on the third conveyor can be reduced.

  The configuration of the manufacturing apparatus is as described above, and the flow of manufacturing the coated absorbent cotton will be described below.

  First, the strip-shaped absorbent cotton 20 drawn out from the absorbent cotton roll 21 moves on the first conveyor 110 at a predetermined speed with the lifting roller 113 restricted from lifting. And the front-end | tip of strip | belt-shaped absorbent cotton 20 passes the rotary cutter 150 and the press roller 123 on a 2nd conveyor, and a rotary cutter descend | falls immediately before reaching the press roller 133 on a 3rd conveyor, and absorbent cotton is cut. Is done.

  The cut absorbent cotton moves on the second conveyor 120 and moves at the speed of the second conveyor while the absorbent cotton is being pressed by the pressing roller 123. When the tip of the absorbent cotton reaches just below the pressing roller 133, the absorbent cotton is The speed is increased to the speed of the third conveyor.

  Therefore, a predetermined interval (gap) is ensured between the front and rear absorbent cotton until the end of the absorbent cotton next to the cut absorbent cotton is cut by the rotary cutter, that is, while the absorbent cotton moves one pitch. .

  Since the absorbent cotton is pressed by the pressing rollers 114 and 123 before and after the rotary cutter 150 and the receiving plate 151 is provided below, the absorbent cotton is cut accurately and sharply.

  Next, the absorbent cotton 22 that has passed through the third conveyor 130 is joined by the covering guide plate 140 to the polyethylene film that has been pulled out of the polyethylene film roll 31 and raised through the guide roller 144, and the absorbent cotton 22 and polyethylene. The film 30 and the guide part 142 are covered with two sides of the absorbent cotton from the outside by the polyethylene film, reach the rectangular discharge port part 143, and the two sides of the absorbent cotton are completely covered (see FIG. 3). After the two sides of the absorbent cotton are covered by the guide plate 140, the overlapping portion of the polyethylene film is welded by the heat roller 150.

  Thereafter, the transmission type optical sensor 160 detects the gap (gap) between the absorbent cotton and the absorbent cotton, and in synchronization with this, the high-frequency sealer 170 with a cutting function provided at the gap (gap) between the absorbent cotton and the absorbent cotton one pitch forward is lowered. Then, the polyethylene film 30 is welded and cut and separated at the above intervals.

  Since the transmission type optical sensor 160 and the high-frequency sealer 170 are separated from each other by only one pitch of the continuous absorbent cotton, the dimensional error is small, and the polyethylene film can be welded and cut and separated at substantially the middle portion of the interval.

  Finally, the absorbent cotton 10 which has been moved on the fourth conveyor 180 and completed the polyethylene film coating operation is subjected to inspection and packaged and shipped.

  Cutting and separating the polyethylene film is not limited to a high-frequency sealer with a cutting function, and a heat wire cutter, a shear press, a rotary cutter, or the like can be used.

  As described above, the absorbent cotton covered with the polyethylene film according to the present embodiment has four sides of the absorbent cotton sealed, the entire surface is covered with the polyethylene film, and the absorbent cotton is not exposed and is like a gauze that has been cut. In addition, the thread that makes up the gauze frays and falls off during handling, solidifies together with the adsorbed blood and body fluid, and causes pain to the patient when it is peeled off from the human body to adhere to the wound There is nothing. Further, the polyethylene film is not harmful to the human body and can provide a sanitary absorbent cotton.

  In addition, since the welding is performed by utilizing the difference in melting points of the polyethylene films on the inner and outer surfaces, the production can be automated, and a high-quality coated absorbent cotton can be obtained at a low cost.

  Using the absorbent cotton and polyethylene film of the following specifications, the entire process from the absorbent cotton roll and the polyethylene roll as materials to the covering of the absorbent cotton with the polyethylene film was automated. As a result, labor saving can be achieved and a coated absorbent cotton with stable quality can be obtained.

  On the other hand, the conventional coating method in which two sides of absorbent cotton were sealed with gauze was changed, and a method of sealing four sides was tried. However, a stable quality product could not be obtained except by sewing with a sewing machine. The method of sewing with a sewing machine is difficult to automate, and requires a lot of time and money for sewing.

absorbent cotton
Width x length: 15cm x 30cm
Thickness: about 3.5mm
Fabric weight: 130 g / m ²
Polyethylene film
Width: 36cm
Thickness inner surface: 0.1mm
External surface: 0.1mm
Melting point inner surface: 120 ° C
External surface: 130 ° C
Operating conditions
First and second conveyor speed: 32.7 m / min
Third conveyor speed: 36 m / min
Heat roll temperature: 120-130 ° C
Spacing between absorbent cotton and absorbent cotton (gap): approx. 15 mm

It is explanatory drawing of the absorbent cotton which coat | covered the polyethylene film which concerns on embodiment of this invention, A figure (A) is a perspective view, A figure (B) is a cross-sectional view, A figure (C) is a longitudinal cross-sectional view. It is explanatory drawing of the manufacturing apparatus and manufacturing method of the cotton wool which concerns on embodiment of this invention. It is explanatory drawing of the guide plate which coat | covers the polyethylene film which concerns on embodiment of this invention, A figure (A) is a top view, A figure (B) is a front view, A figure (C) is a side view. It is a perspective view for demonstrating the state when covering absorbent cotton with the polyethylene film which concerns on embodiment of this invention.

Explanation of symbols

10 .. Absorbent cotton (after coating)
20 .. Absorbent cotton (band-like)
21 .. Absorbent cotton roll 22 .... Absorbent cotton (after cutting)
23 .. Spacing between absorbent cotton (gap)
30 .. Polyethylene film 31 .. Polyethylene film roll 110 .. First conveyor 111, 112 .. Conveyor roller 113, 114 .. Holding roller 115 .. Belt 120 .. Second conveyor 121, 122. Conveyor roller 123. · Pressing roller 124 · · Belt 125 · · Spacer 130 · · Third conveyor 131, 132 · · Conveyor rollers 133 and 134 · · Pressing roller 135 · · Belt 140 · · Guide plate (for coating)
141 .. Introduction part 142 .. Guide part 143 .. Discharge port part 144 .. Guide roller 150 .. Rotary cutter 151 .. Receiving plate (for cutter)
160 ・ ・ Optical sensor (Transmission type)
161 .. Light emitting part 162 .. Light receiving part 170 .. High frequency sealer (with cutting function)
180 .. Fourth conveyor 181, 182, 183 .. Conveyor roller 184 .. Belt 190 .. Heat roller

Claims (4)

  A rectangular sheet-like absorbent cotton is covered with a synthetic resin net-like film so that the two opposite sides of the absorbent cotton are wrapped from the outside, and the end of the film is overlaid on one surface of the absorbent cotton, The end portions of the upper and lower films are thermally welded to each other, and the synthetic resin net-like films adjacent to the two sides perpendicular to the two opposite sides of the absorbent cotton are thermally welded, and the four sides of the absorbent cotton are bonded. Absorbent cotton that is sealed and covered with a net-like film made of synthetic resin.   2. The absorbent cotton coated with a synthetic resin net-like film according to claim 1, wherein the synthetic resin net-like film is a polyethylene or polypropylene film.   2. The synthetic resin net film according to claim 1, wherein the synthetic resin net film is composed of two layers of polyethylene film having a low melting point on the inner surface and a high melting point on the outer surface. absorbent cotton. It is a manufacturing method for manufacturing absorbent cotton products coated with a synthetic resin net-like film from an absorbent cotton roll wound with a strip of absorbent cotton and a synthetic resin net-like film roll,
Cutting the strip-shaped absorbent cotton into rectangles;
Separating the cut absorbent cotton at a predetermined interval;
A step of covering the absorbent cotton separated at a predetermined interval with a synthetic resin net-like film so as to wrap up two opposite sides of the absorbent cotton from above and below;
Heat-welding the end portions of the films superposed on each other; and
A step of heat-welding synthetic resin net-like films adjacent to two sides orthogonal to two opposite sides of the absorbent cotton, and a step of separating a portion where the synthetic resin net-like films are heat-welded to each other at a substantially intermediate portion thereof A method of manufacturing absorbent cotton, comprising sealing four sides of the cut absorbent cotton and covering the entire surface with a synthetic resin net-like film.

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