WO2010122665A1 - 傷手当用品とその製造方法 - Google Patents
傷手当用品とその製造方法 Download PDFInfo
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- WO2010122665A1 WO2010122665A1 PCT/JP2009/058190 JP2009058190W WO2010122665A1 WO 2010122665 A1 WO2010122665 A1 WO 2010122665A1 JP 2009058190 W JP2009058190 W JP 2009058190W WO 2010122665 A1 WO2010122665 A1 WO 2010122665A1
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- Prior art keywords
- perforated material
- low
- resin
- absorbent body
- wound
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive bandages or dressings
- A61F13/0203—Adhesive bandages or dressings with fluid retention members
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive bandages or dressings
- A61F13/0276—Apparatus or processes for manufacturing adhesive dressings or bandages
- A61F13/0279—Apparatus or processes for manufacturing adhesive dressings or bandages by attaching individual patches on moving webs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
- A61F13/60—Adhesive tab fastener elements with release means associated with tab fasteners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to a wound care product used for wound protection and treatment and a method for manufacturing the wound care product.
- wound care products such as multi-layered pads that conventionally include layers of gauze, absorbent cotton, absorbent fibers to protect the wound and absorb fluid from the wound Is used.
- these wound dressings may damage the wound surface when the dressing is replaced after application, leading to pain, bleeding, and delayed healing of the wound.
- the wound care product is sticky to the wound part or the peripheral skin part for the purpose of preventing handling of fixing and the like and the maceration of the skin around the wound due to leakage of body fluid.
- wound care products provided with conventional adhesive layers for example, acrylic adhesives, rubber adhesives
- a material having a weak adhesive force with respect to a living tissue as a material that contacts the wound part.
- a material made of a silicone resin having a low affinity for a living body is preferable.
- Patent Document 1 discloses a wound dressing product in which a silicone gel leaves a through hole of an elastic mesh reinforcement and seals all components of the mesh. Disclosure. According to the technique of patent document 1, the adhesiveness to a wound improves by using this silicone resin for a wound contact material. However, since the wound dressing described in Patent Document 1 does not have absorbability, it has been troublesome to use it in combination with some absorbent material. In addition, if an absorbent body is used in combination with the wound dressing product, the absorbent body is exposed from the through hole portion of the wound dressing product. For this reason, in the part of the through-hole, there existed a risk of adhering easily with the new tissue of a wound part.
- Patent Document 2 teaches a wound dressing product in which one side of an air-impermeable and body fluid-impermeable perforated layer material (carrier material) is coated with a silicone gel. Since this wound dressing has an absorbent body, there is no need to use it together with the absorbent body, which was the problem of Patent Document 1. However, the wound dressing product described in Patent Document 2 is the same as the wound dressing product described in Patent Document 1, because the applied absorbent body is exposed in the through-hole portion, so that there is a risk of easily sticking to the new tissue. It has not been solved with regard to sex.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a wound dressing that has absorbency and has improved adhesion to a wound.
- a wound dressing product comprising a perforated material having a top surface and a bottom surface and having a plurality of through holes, and an absorber disposed on the top surface of the perforated material
- At least the bottom surface of the perforated material is covered with a low-adhesive resin so that at least a part of the through hole is not blocked, and faces the through hole of the perforated material of the absorber.
- At least a part of the portion is covered with a low-adhesive resin so that liquid can pass from the bottom surface side of the perforated material into the absorber.
- the upper surface of the perforated material is coated with a low-adhesive resin so that at least a part of the through hole is left so that the entire through hole is not blocked.
- the present invention also relates to a wound dressing article comprising a perforated material having a top surface and a bottom surface and having a plurality of through holes, and an absorbent body disposed on the top surface of the perforated material.
- a perforated material having a top surface and a bottom surface and having a plurality of through holes
- an absorbent body disposed on the top surface of the perforated material.
- at least a part of the part facing the through hole of the opening material of the absorber is covered with the low-adhesive resin so that at least a part of the through hole is not blocked.
- the porous material is coated with a low-adhesion resin, and the perforated material and the absorbent body are adhered by the low-adhesive resin located on the upper surface of the perforated material, so that liquid can pass from the bottom surface side of the perforated material into the absorbent body. It is characterized by doing so.
- the low adhesive resin is a silicone resin.
- the low adhesive resin is preferably an adhesive gel.
- the inner peripheral surface of the through hole of the perforated material is covered with a low-adhesion resin without blocking the entire through hole.
- the low-adhesion resin penetrates into the inside from the bottom surface of the perforated material and reaches the top surface of the perforated material.
- the low-adhesive resin in which the perforated material and the absorber penetrate from the bottom surface of the perforated material to the inside and reach the upper surface of the perforated material is preferable.
- the portion of the absorbent body facing the through hole of the perforated material is coated with a low-adhesive resin to the extent that the liquid does not hinder the passage of liquid from the bottom surface side of the perforated material into the absorbent body. .
- the perforated material is covered with a low-adhesive resin so that almost all of the through holes are not blocked, and almost all of the perforated material of the absorber is covered. It is preferable that the part facing all the through holes is covered with a low-adhesive resin. Furthermore, it is preferable that the amount of low-viscosity resin covering the perforated material and the absorber is 150 to 350 g / m 2 .
- the perforated material is preferably a knitted fabric having a thickness of 0.05 to 0.7 mm. Furthermore, it is preferable that the perforated material has a through-hole average cross-sectional area of 0.01 to 10 mm 2 and a perforation ratio of 5 to 70%.
- the following invention is preferable. That is, A perforated material having a top surface and a bottom surface and having a plurality of through-holes, and an absorber disposed on the top surface of the perforated material, wherein at least the bottom surface of the perforated material is closed over all of the through-holes. So that at least part of the through-holes is covered with a low-adhesion resin, and at least part of the portion of the absorbent body facing the through-holes of the perforated material is coated with the low-adhesive resin, A method for manufacturing a wound dressing product that allows liquid to pass from the bottom surface side of the body to the inside of the absorbent body, comprising the following steps.
- P1 Step of applying low-viscosity resin to release sheet
- P2 A perforated material is placed on the low-adhesive resin-coated surface before curing, an absorbent is placed on the top surface of the perforated material, and the perforated material and absorption Step of coating low-viscosity resin on body
- P3 Step of heat-curing low-viscosity resin
- a perforated material having a top surface and a bottom surface and having a plurality of through-holes and an absorber disposed on the top surface of the perforated material, the top surface and the bottom surface of the perforated material are all closed with through holes So that at least part of the through-holes is covered with a low-adhesion resin, and at least a part of the portion of the absorbent body facing the through-holes of the perforated material is covered with a low-adhesion resin.
- This is a method for manufacturing a wound dressing product in which a material and an absorbent body are bonded by a low-viscosity resin located on the top surface of the perforated material so that liquid can pass from the bottom surface side of the perforated material into the absorbent body. The following steps are included.
- Step (P1) Step of applying low-adhesion resin to release sheet (P2A) Putting a perforated material on the low-adhesive resin-coated surface before curing, placing an absorber on the upper surface of the perforated material, and applying a low-adhesive resin The perforated material and the absorber are bonded with a low-adhesive resin by penetrating from the bottom of the perforated material into the inside and reaching the upper surface of the perforated material, and the low-adhesive resin is coated on the perforated material and the absorbent.
- the low-adhesion resin is preferably a silicone resin.
- the wound dressing product of the present invention since both the perforated material and the absorbent body, which become the wound contact surface, are coated with a low-adhesive resin, even if the new granulation tissue enters from the through hole of the perforated material, The product can be prevented from strongly adhering to the wound surface, and the wound dressing product can be removed or replaced without damaging the fragile new epidermal tissue.
- the wound care product of the present invention quickly absorbs exudate from the wound from the wound surface to the absorbent body, it can prevent skin maceration and wound healing delay due to excessive exudate. Furthermore, according to the manufacturing method of the present invention, the above wound care product can be easily manufactured.
- the figure which shows the wound care article which concerns on embodiment of this invention The figure which shows the wound care article which concerns on different embodiment of this invention.
- the figure explaining the manufacturing method of the wound dressing article of this invention The figure explaining the continuous manufacturing method of the wound dressing goods of this invention.
- FIG. 1 is an embodiment according to the wound care product of the present invention, in which a) is a perspective view seen from the top, b) is a perspective view seen from the bottom, and c) is an enlarged sectional view taken along line CC in FIG. Indicates.
- the wound dressing 10 of the present invention includes a perforated material 20 having a top surface and a bottom surface, and an absorbent body 30 disposed on the top surface of the perforated material 20.
- the perforated material 20 is formed from a knitted fabric, and a plurality of through holes 21 are formed by the knitted structure, and the bottom side thereof is a surface facing the scratch.
- the top surface and bottom surface of the perforated material 20 and the inner peripheral surface 22 of the through hole 21 are at least part of the hole so that the whole hole of the through hole 21 is not blocked (all of the through holes in this embodiment). And is covered with a gel-like adhesive silicone resin 40.
- the wound dressing 10 of the present invention has a hole penetrating from the top surface to the bottom surface of the perforated material 20 so that liquid such as blood and exudate can pass from the bottom surface side of the perforated material into the absorber 30.
- the silicone resin 40 covers the perforated material 20 while leaving at least a part thereof (all of the through holes in this embodiment).
- a release sheet (not shown) is provided on the bottom side of the silicone resin 40 as a protective material for the silicone resin coating layer and the perforated material before use of the wound care product.
- a part of the portion 31 of the perforated material 20 facing the through hole 21 inhibits the passage of liquid such as blood and exudate from the bottom surface side of the perforated material into the absorbent body. It is covered with a gel-like adhesive silicone resin to such an extent that it does not.
- a gel-like adhesive silicone resin to such an extent that it does not.
- the entire surface of the perforated material 20, that is, the upper surface, the bottom surface, and the inner peripheral surface of the through hole are covered with the silicone resin 40, and the holes of the absorber 30 are further covered.
- the gel-like adhesive silicone resin 40 penetrates into the inside of the knitted fabric from the bottom surface of the perforated material 20, and reaches the top surface of the perforated material. And the perforated material 20 and the absorber 30 are adhere
- the wound care product 10 according to the embodiment of FIG. 1 is formed by coating the perforated material and the absorbent body with the silicone resin, and integrating the perforated material and the absorbent body with one kind of adhesive silicone resin 40. Therefore, the material structure is simple and the manufacturing process becomes extremely simple.
- cover material 50 is a cover material coated on the upper surface of the absorbent body 30 and has functions such as preventing contamination of the absorbent body, supporting wound care products, and preventing contaminants from falling off the absorbent body.
- a liquid-permeable nonwoven fabric is used as the cover material 50, but such a cover material is a particularly advantageous configuration when a large amount of exudate from the scratches comes out.
- cover material since excessive exudate oozes from the cover material, if an absorbent pad different from the wound care product of the present invention is placed on the cover material, the wound care product of the present invention is not removed. If necessary, only this absorption pad can be replaced, and the exudate can be managed easily.
- the wound care product of the present invention is also useful as a pad used in a negative-pressure wound closure method (Negative-Pressure Wound Therapy) and a wound cleaning system.
- a negative-pressure wound closure method Negative-Pressure Wound Therapy
- a wound cleaning system Specifically, it can be used in the following manner. First, the wound dressing product of the present invention is placed on the wound, and then a tube is placed on the cover material of the wound dressing product, and a fluid suction source such as a pump and / or a cleaning solution bag is connected to the tube. Then, the entire affected area is covered with a liquid-impermeable adhesive film or bag so that the entire wound dressing is sealed from above the tube.
- inhalation and / or flowing in a liquid through a tube can perform wound drainage and washing
- the entire surface (the upper surface, the bottom surface, and the inner peripheral surface of the through hole) of the perforated material 20 is coated with an adhesive silicone resin is shown, but only the bottom surface of the perforated material is shown. It is also possible to adopt a mode in which only the bottom and top surfaces of the perforated material are coated. Further, the perforated material 20 is preferably coated with a silicone resin so that the entire through-hole 21 is not blocked with the silicone resin. A part may be blocked with silicone resin.
- the perforated material 20 and the absorbent body 30 may be bonded with a pressure-sensitive adhesive other than a silicone resin such as an acrylic pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, or a polyurethane pressure-sensitive adhesive, or by heat welding. May be.
- FIG. 2 is an embodiment different from FIG. 1 according to the wound dressing of the present invention, in which a) is a perspective view from the top, b) is a perspective view from the bottom, and c) is a CC line in FIG. FIG.
- the embodiment shown in FIG. 2 is different from the embodiment shown in FIG. That is, the cover material 51 is made of a liquid-impermeable and water-vapor-permeable plastic film, the bottom surface of which is coated with an adhesive silicone resin 52, and the outer peripheral edge extends outward from the outer peripheral edge of the absorber 30. Yes. When this wound dressing is fixed to the affected area, the portion extending outwardly covers the member below the absorber. Therefore, according to the embodiment of FIG.
- the cover material 51 can easily fix the wound dressing to the affected part, and can prevent the exudate from leaking from the outer peripheral edge of the absorbent body even when the exudate is excessive, Furthermore, since wounds can be maintained in a moderately moist environment, wound healing can be promoted.
- FIG. 3 is an embodiment in which the shape of the wound dressing according to FIG. 1 of the present invention is changed. According to this embodiment, even when affixed to protrusions and curved parts such as the heel, elbow, knee, sacrum, and forearm, it fits well to the affected part and can apply wound care products without wrinkles.
- the shape of the wound care product of the present invention is not limited to the shape of the above-described embodiment, and various shapes that can be easily applied to the shape of each part of the human body can be used. It can also be made into a clothing form that can be worn.
- the dressing wound dressing according to the present invention include, for example, sleeve-like or belt-like clothing covering the extremities, trunk (chest or abdomen), neck, head, etc., shirt-like (shirt with sleeve, shirt without sleeve) Etc.) and the like, such as clothing for upper body such as socks, high socks, stockings, tights and pants.
- the shape of a sleeve or lower body clothing is preferable, and it is effective for treatment of ulcers and foot amputations associated with diabetic foot lesions and peripheral arterial disease (PAD), which have increased in recent years.
- a perforated material coated with a low-adhesive resin may be arranged on the inner surface side that comes into contact with the skin of the clothing.
- Etc. sewing, knitting, and weaving techniques Etc. can be used as appropriate.
- FIGS. 1 to 3 the example in which the silicone resin is used as the low-adhesion resin that covers the perforated material and the absorbent body is shown.
- the embodiment uses a low-adhesion resin other than the silicone resin. It may be.
- FIG. 5 is a diagram schematically showing a state in which the respective steps are continuously performed, and each step is substantially the same as FIG.
- the process of P1 is a process of applying the silicone resin 40 to the release sheet 60.
- a release paper, a release film, or a film of polycarbonate, polyvinyl alcohol, cellophane, urethane, or the like treated with a silicone-based or fluorine-based release agent can be used.
- the perforated material 20 is placed on the uncured silicone resin coated surface 40 applied in the process of P1, and the absorbent body 30 (this absorbent body absorbs the cover material 50 in advance) on the upper surface of the perforated material 20. It can also be stacked on top of the body).
- the lamination of the silicone resin, the perforated material, and the absorbent body may be performed almost simultaneously as shown in FIGS. 4 and 5, or the perforated material is first supplied onto the silicone resin, and then the absorbent body. May be supplied.
- the perforated material on the silicone resin and further placing the absorbent body thereon, the portion other than the through hole of the perforated material and the through hole of the perforated material of the absorbent body
- the silicone resin is coated on the facing part.
- the process of P2A shown next is especially preferable.
- the perforated material 20 is first placed on the silicone resin coated surface 40 before curing, and the absorbent body 30 is placed on the upper surface of the perforated material 20, similarly to the process of P2.
- the silicone resin 40 penetrates from the bottom surface of the perforated material 20 to the inside, and reaches the top surface of the perforated material 20 to thereby form the perforated material 20 and the absorber 30.
- a silicone resin 40 are bonded with a silicone resin 40.
- the silicone resin present in the through hole portion of the perforated material is absorbed by the surface of the absorber, and the portion of the absorbent body facing the through hole of the perforated material is absorbed. Cover with silicone resin.
- the perforated material is covered with the silicone resin without blocking the through hole of the perforated material, and the absorbent body is also coated with the silicone resin, and further the adhesion between the perforated material and the absorbent body Is a process that can be achieved simultaneously.
- the process of P3 is a process of heat-curing the silicone resin applied to the perforated material and the absorber in the process of P2 (P2A), and the uncured and liquid silicone resin is cured through this process.
- the wound dressing 10 is completed.
- Various embodiments of the present invention can be produced by controlling the type of silicone resin, the coating amount, the type of perforated material and absorber, the degree of load, and the like.
- the wound dressing of the present invention can also be produced by methods other than those described above.
- a perforated material is immersed in an uncured silicone resin, and after excess silicone resin is squeezed, an absorbent body is placed thereon.
- the silicone resin is heated and cured, and then sprayed with a silicone resin by spraying or the like, and the portion of the absorbent body facing the through hole of the perforated material is coated with the silicone resin.
- FIGS. 4 and 5 the example in which the silicone resin is used as the low-adhesive resin for covering the perforated material and the absorber is shown. The same method can be used when an adhesive resin is used.
- the perforated material used for the wound care product of the present invention has an upper surface and a bottom surface, and the bottom surface is a surface facing the wound.
- the perforated material needs to have a plurality of through holes communicating from the top surface to the bottom surface. This is because blood, exudate, and the like from the wound are absorbed by the absorbent body through the through hole of the perforated material.
- the average cross-sectional area of the through holes provided in the perforated material is preferably 0.01 to 10 mm 2 per pore on the surface of the perforated material, and more preferably 0.1 to 5 mm 2 .
- the average cross-sectional area of the through holes is less than 0.01 mm 2 , when the perforated material is coated with silicone resin, the silicone resin will block the through holes of the perforated material, and the exudate will move from the perforated material to the absorber. There is a risk of disappearing.
- the average cross-sectional area of the through-hole is larger than 10 mm 2 , a sufficient contact area between the perforated material and the wound surface cannot be obtained, and the adhesion of the wound dressing to the wound may be reduced and the exudate may leak.
- the aperture ratio of the through holes is preferably 5 to 70%, more preferably 15 to 50%.
- the exudate may not move from the opening material to the absorber, and if it is more than 70%, a sufficient contact area between the opening material and the wound surface cannot be obtained.
- the adhesiveness of the wound dressing to the wound may be reduced and the exudate may leak.
- Particularly suitable hole opening materials are those in which the average cross-sectional area of the through holes is 0.1 to 1 mm 2 and the open area ratio of the through holes is in the range of 15 to 40%.
- the thickness of the perforated material is preferably in the range of 0.05 to 0.7 mm from the viewpoint of the mobility of the exudate to the absorber and the non-adhesiveness to the wound surface.
- the perforated material that can be used in the present invention is not particularly limited as long as it is a sheet-like material having a through hole, and examples thereof include knitted fabrics, woven fabrics, nonwoven fabrics, nets and other fibrous materials, perforated plastic films, and the like.
- the perforated material is preferably a liquid-permeable fibrous material, and particularly preferably a knitted fabric that is easy to form through-holes and is optimal for the method for producing a wound dressing according to the present invention.
- the perforated material one type of these materials may be used alone, or a layered structure in which the same or different types of materials are laminated may be used.
- the knitted fabric used for the perforated material various knitting structures of warp knitting and weft knitting can be used.
- Particularly suitable knitted fabrics are flat knitted fabric, rubber knitted fabric, tricot fabric, and raschel fabric.
- the woven fabric may be any of plain weave, twill weave and satin weave.
- the nonwoven fabric may be any one of a dry method, a wet method, and a spunbond method as a fleece forming method, and the fiber bonding is a spunlace method, a needle punch method, a chemical bond method, a point seal method, a thermal method It may be formed by any method such as a bond method.
- the net can be formed by arranging a plurality of long fibers at appropriate intervals so that a mesh is formed, and bonding the fibers together by a bonding means such as heat fusion or adhesive.
- Monofilaments, multifilaments, twisted yarns, covered yarns, core yarns, etc. can be used as yarns constituting fibrous materials such as knitted fabrics, woven fabrics, non-woven fabrics and nets. May be.
- the type of fiber is not particularly limited, and polyester fiber, acrylic fiber, polyamide fiber, polyurethane fiber, cellulosic fiber (cotton, rayon, polynosic, lyocell), polyolefin fiber, polyvinyl chloride fiber, polychlorinated fiber. Vinylidene fibers, glass fibers, carbon fiber fiber fibers and the like can be used.
- Particularly preferred fiber materials are thermoplastic polyester fibers, acrylic fibers and polyamide fibers.
- the arrangement of the through holes in the perforated material is not particularly limited, and may be regularly or randomly interspersed, and may be arranged in a predetermined pattern such as a lattice shape, a wavy shape, a concentric shape, or a spiral shape. However, it is preferable that the perforated materials are arranged at a uniform interval so that the exudate can permeate uniformly.
- the perforation hole of the perforated material is formed between the perforation hole due to the stitch of the knitted fabric, the through hole generated on the fabric surface due to the balance of the fiber structure (including yarn thickness, density, etc.), and between the warp and weft of the woven fabric
- It may be a fiber material such as a void originally formed, or may be a through hole physically perforated by post-processing.
- the through-hole formed by the loop of the knitted fabric or the through-hole formed on the surface of the fabric due to the balance of the knitted structure (including yarn thickness, density, etc.) has a good fit to the human body in the fiber material itself, and is a silicone resin. This is preferable because the through-hole is not easily blocked when the layer is applied.
- the absorbent body used in the wound care product of the present invention is for absorbing and holding blood and exudate from the wound, and is disposed on the top surface of the perforated material.
- the absorbent body may be made of a fibrous material such as a nonwoven fabric, a knitted fabric, or a woven fabric, a foam material, an absorbent resin material, a water-absorbing powder material, and the like, and a fibrous material and a foam material are preferable.
- the absorber may use one kind of these materials alone, or may have a laminated structure in which the same or different kinds of materials are laminated.
- cellulosic fibers cotton, rayon, polynosic, lyocell
- polyester fibers acrylic fibers
- polyamide fibers polyurethane fibers
- mixed fibers thereof are suitable fiber materials.
- highly absorbent materials such as absorbent resin materials and water absorbent powder materials can be mixed into these fiber materials, and the required amount of absorption can be adjusted as appropriate.
- sodium carboxymethyl cellulose a cross-linked product of sodium carboxymethyl cellulose, starch-acrylic acid (salt) graft copolymer, acrylic acid (salt) polymer, starch-acrylonitrile copolymer, polyhydric alcohol and the like are preferable. .
- the low-adhesive resin used in the wound care product of the present invention is not particularly limited, and it is a degree that does not cause excessive irritation or damage to the skin or wound when the wound dressing product of the present invention is applied to an affected area and removed. What is necessary is just to have the adhesiveness of.
- the low-adhesion resin includes a polymer substance obtained by natural or synthesis, a mixture thereof, and those obtained by adding other substances to these polymer substances.
- the low-adhesion resin used in the present invention may be either hydrophobic or hydrophilic, and can be used in the form of an organogel or hydrogel in combination with an appropriate liquid substance.
- the low-adhesion resin is preferably a hydrophobic resin and is preferably used in the form of a hydrophobic gel.
- the material of the hydrophobic resin one having a contact angle between the surface of the layer formed of the resin and water of 65 ° or more may be selected.
- those made of a material containing a silicone resin are preferable.
- the contact angle can be measured using a contact angle meter CA-A (manufactured by Kyowa Interface Science Co., Ltd.) according to the instruction manual “Droplet method measurement operation” of the contact angle meter.
- the silicone resin suitable as the low-adhesive resin used in the wound dressing of the present invention is opposed to at least the bottom surface of the perforated material and the through-holes of the perforated material of the absorbent body in order to reduce adhesion to the scratch.
- the part is covered.
- the silicone resin used in the present invention is preferably a gel-like substance having adhesiveness from the viewpoint of easy handling and adhesion to scratches.
- the silicone resin is not particularly limited, and any of an addition reaction type, a peroxide reaction type, or a condensation reaction type may be used, but an addition reaction type silicone resin is preferable.
- the addition reaction type silicone resin comprises an organopolysiloxane having an alkenyl group bonded to a silicon atom (alkenyl group-containing organopolysiloxane) and an organopolysiloxane having a hydrosilyl group (Si—H) (hydrogen organopolysiloxane).
- This is an addition reaction (hydrosilylation reaction) using a platinum compound catalyst such as chloroplatinic acid.
- the addition reaction type silicone resin can adjust the crosslinking density by changing the amount of organohydrogenpolysiloxane used for the synthesis and the amount of hydrosilyl group (Si—H) in the organohydrogenpolysiloxane molecule. it can.
- the addition reaction type silicone resin used in the present invention is preferably an addition reaction product of vinyl group-substituted polydimethylsiloxane and organohydrogenpolysiloxane.
- a silicone resin may be used individually by 1 type, or may be used in combination of 2 or more types.
- the silicone resin is preferably cured by crosslinking or the like.
- the curing method of the silicone resin is not particularly limited, and can be easily crosslinked by heating or the like.
- the silicone resin can be appropriately mixed with other adjusting agents such as a drug, a water-absorbing polymer compound, and a pH adjusting agent as long as the object of the present invention is not impaired.
- adjusting agents such as a drug, a water-absorbing polymer compound, and a pH adjusting agent as long as the object of the present invention is not impaired.
- the drug include substances that adjust the physiological functions of the skin for the purpose of moisturizing, preventing aging, and whitening, substances that promote wound healing, substances that have antibacterial properties, and the like.
- sphingolipids include sphingolipids, urea, glycolic acid, amino acids and derivatives thereof (arginine, cysteine, glycine, lysine, proline, serine, etc.), protein hydrolysates (collagen, elastin, keratin, etc.), mucopolysaccharides and their Derivatives (hyaluronic acid, chondroitin sulfate, heparin, etc.), vitamin B group (thiamine, riboflavin, nicotinic acid, pyridoxine, pyridoxal, pyridoxamine, biotin, folic acid, cyanocobalamin, etc.), ascorbic acid (vitamin C and its derivatives), retinoid (vitamin A, retinal, retinoic acid, etc.), vitamin D (D2, D3, etc.), vitamin E and its derivatives, carotenoids (carotene, lycopene, xanthophyll, etc.),
- the sphingolipid is particularly suitable.
- the sphingolipid is preferably a ceramide in which sphingosine and a fatty acid are bonded, or a glycosphingolipid in which ceramide and a sugar are bonded.
- ceramide either natural or synthetic ceramide may be used, and examples thereof include ceramides of types 1 to 7, and ceramides of types 2, 5, and 7 are particularly preferable.
- sphingoglycolipid cerebroside, galactosylceramide, glucosylceramide and the like are preferable.
- a well-known thing can be used as a water absorbing polymer compound and a pH adjuster.
- cover material In the wound dressing product of the present invention, it is preferable to cover the upper surface of the absorbent body from the viewpoint of preventing contamination of the absorbent body, handling of the wound dressing product, and preventing contaminants from falling off the absorbent body.
- the cover material can be selected according to the amount of exudate from the wound and the situation of use. When the amount of exudate is large, it is preferable to use a liquid-permeable material, and the amount of exudate is so large. If not, it is preferable to use a liquid impermeable and water vapor permeable material.
- the cover material covers the bottom surface with an adhesive and forms an outer shape larger than that of the perforated material and the absorber, so that the affected part is formed by a portion that is outside the peripheries of the perforated material and the absorber. It becomes possible to adhere and fix to.
- the pressure-sensitive adhesive covering the bottom surface of the cover material the same material as the silicone resin covering the perforated material and the absorber can be used.
- it contains an acrylic pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, and a water-absorbing polymer.
- an adhesive other than a silicone resin such as a so-called hydrocolloid adhesive.
- the material for the cover material include non-woven fabrics, knitted fabrics, woven fabrics, fibrous sheets such as nets, synthetic resin films, foams, etc., and the degree of liquid permeability can be controlled by appropriate selection of these materials. it can.
- Perforated material and absorber coated with low adhesive resin In the wound dressing of the present invention, at least the bottom surface of the perforated material is covered with a low-adhesive resin so that at least a part of the through-hole is left so that the entire through-hole is not blocked. If the liquid passes from the bottom surface side of the perforated material to the inside of the absorber, a part of the perforated hole of the perforated material may be blocked with a low-adhesive resin, but 60% or more of the perforated material is low-adhesive.
- the penetrating part remains without being blocked by the adhesive resin, more preferably 80% or more of the through hole remains, and almost all of the through hole remains without being blocked by the low adhesive resin. It is particularly preferable. In particular, it is preferable that almost the entire bottom surface of the perforated material is coated with a low-adhesive resin so that almost all of the through holes are not blocked. Since the through hole of the perforated material is not blocked by the low-adhesive resin, the exudate can pass from the bottom surface side of the perforated material into the absorber.
- the top surface of the perforated material is preferably coated with a low-adhesive resin, and the entire surface of the perforated material including the inner peripheral surface of the through-hole is low-adhesive. More preferably, it is coated with a resin.
- a low-adhesive resin In the wound care product of the present invention, at least a part of the portion of the absorbent body facing the through hole of the perforated material is coated with a low-adhesive resin.
- the absorber is coated with a low-adhesive resin, it is necessary that liquid such as blood and exudate can pass from the bottom surface side of the opening material into the absorber.
- the portion of the absorber facing the through hole of the perforated material must be coated with a low-adhesive resin to the extent that the liquid does not hinder the passage.
- a portion of the perforated material facing 60% or more of the through holes is coated with a low-adhesive resin, and a portion of the perforated material facing 80% or more of the through holes is low. More preferably, it is coated with an adhesive resin, and it is particularly preferable that a portion of the perforated material facing almost all through holes is coated with a low-adhesive resin.
- the amount of the low-tack resin that covers the absorber is preferably 5 to 150 g / m 2 , more preferably 15 to 100 g / m 2 . If the amount of the low-viscosity resin covering the absorber is less than 5 g / m 2, it becomes difficult to prevent the absorber from being fixed to the scratch. If the amount is more than 150 g / m 2 , the low-adhesion resin becomes an absorber. There is a possibility that the exudate is not efficiently absorbed due to blocking the pores.
- the perforated material and the absorbent body with a low-adhesive resin located on the upper surface of the perforated material from the viewpoint of adhesion to scratches and manufacturing.
- the low-adhesive resin penetrates from the bottom surface of the perforated material to the inside and reaches the top surface of the perforated material, and is bonded by the low-adhesive resin.
- the perforated material can be coated with the low-adhesive resin and the perforated material and the absorber can be integrated at the same time, which is advantageous in manufacturing.
- the amount of the low-adhesive resin to be attached to the entire wound care product including both the perforated material and the absorbent is preferably 150 to 350 g / m 2 , and more preferably 170 to 250 g / m 2 .
- the amount is less than 150 g / m 2, it is difficult to prevent sticking to the scratch, and it is difficult to allow the low-viscosity resin to penetrate into the perforated material and bond the perforated material and the absorbent body.
- the low-adhesive resin may block the through-holes of the perforated material and the pores of the absorber, and the exudate may not be absorbed efficiently.
- the adhesive strength of the wound dressing of the present invention is preferably 0.1 to 1.5 N / 25 mm, and more preferably 0.15 to 1.2 N / 25 mm. If the adhesive force of the wound dressing product is lower than 0.1 N / 25 mm, the adhesion to the affected area may be impaired. If it is higher than 1.5 N / 25 mm, the wound surface may be damaged when replacing the wound dressing product. There is.
- the low-adhesive resin used for the wound dressing of this invention is adhesive. You may comprise so that it may hardly be exhibited.
- Adhesive strength of wound dressing (unit: N / 25mm) Measured according to JIS Z 0237-2000 “180 degree peeling adhesion”. However, a bakelite plate is used for the adherend.
- Example 1 It produced according to the manufacturing method which passed through the process of P1, P2A, and P3 demonstrated in FIG. Specifically, it is as follows. It is obtained by mixing a vinyl group-substituted polydimethylsiloxane, an organohydrogenpolysiloxane, and a two-component addition-reactive silicone resin mainly composed of a platinum catalyst (trade name “DOW CORNING 7-9800” manufactured by Dow Corning). The mixed solution was applied to a silicone release sheet with a certain thickness. Next, an absorbent body made of a non-woven fabric including a perforated material made of polyester tricot and a rayon fiber is supplied onto the coated silicone resin.
- Example 2 A wound dressing product was obtained in the same manner as in Example 1 except that the absorbent body was replaced with polyurethane foam.
- FIG. 7 shows an enlarged view from the perforated material side of the obtained wound dressing. Also in FIG. 7, it can be seen that the silicone resin is entangled and adhered to a part of the polyurethane foam of the absorber.
- Example 1 A wound dressing was prepared with the same structure as in Example 1 except that the silicone resin was coated only on the bottom surface of the perforated material. That is, in the wound care product of Comparative Example 1, the portion of the absorbent body facing the through hole of the perforated material is not covered with the silicone resin. An enlarged view from the perforated material side of the obtained wound dressing is shown in FIG.
- Table 1 shows the evaluation results of Examples and Comparative Examples.
- a full-thickness skin defect layer having a diameter of 3 cm is prepared on the left flank of a 6-week-old male SD rat.
- the prepared wound is covered with a sterilized wound dressing, and an elastic bandage is wound around it and fixed.
- the wound dressing is peeled from the wound two days after the wound is made, and the sticking state is observed after nine days.
- Example 1 On the other hand, the wound dressing product obtained in Example 1 could be peeled off after 2 days without causing any sticking. The wound surface after peeling is not uneven at all. After 9 days, although light fixation occurred at the through-hole portion of the perforated material, bleeding from the wound surface after peeling was hardly confirmed.
- the difference in configuration between Example 1 and Comparative Example 1 is that a part of the portion of the absorbent body facing the through hole of the perforated material is covered with a silicone resin. Therefore, it was confirmed that this invention is effective with respect to adhesion
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Abstract
Description
しかし、これらの傷手当用品は、手当用品を適用後交換する際に創傷面を傷つけ、痛みや、出血、創傷の治癒遅延を招くことがあった。
一方で、傷手当用品は、固定等の取り扱い性、体液の漏れによる傷周辺皮膚への浸軟を防止する目的で、創傷部また周辺皮膚部に対し粘着性であることが望ましい。
しかしながら、従来の粘着層(例えばアクリル系接着剤、ゴム系接着剤)を備えた傷手当用品は、粘着力が強すぎる傾向があり、交換時に創傷部に固着することで脆弱な新生表皮組織に損傷を与え、組織の治療を遅延する原因となっていた。
しかしながら、特許文献1記載の傷手当用品は吸収性を有さないことから、何らかの吸収材料と併用する手間があった。また、この傷手当用品に、仮に吸収体を併用した場合には、傷手当用品の貫通孔の部分から吸収体が露出されてしまう。このため貫通孔の部分においては、創傷部の新生組織と容易に固着する危険性があった。
上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備え、孔開き材料の少なくとも底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、孔開き材料の底面側から吸収体内部へ液体が通過し得るようにした傷手当用品の製造方法であって、下記の工程を含むことを特徴とする。
(P1)剥離シートに低粘着性樹脂を塗工する工程
(P2)硬化前の低粘着性樹脂塗工面に孔開き材料を載せ、孔開き材料の上面に吸収体を載せ、孔開き材料及び吸収体に低粘着性樹脂を被覆する工程
(P3)低粘着性樹脂を加熱硬化させる工程
上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備え、孔開き材料の上面及び底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、孔開き材料と吸収体とが、孔開き材料の上面に位置する低粘着性樹脂により接着され、孔開き材料の底面側から吸収体内部へ液体が通過し得るようにした傷手当用品の製造方法であって、下記の工程を含むことを特徴とする。
(P1)剥離シートに低粘着性樹脂を塗工する工程
(P2A)硬化前の低粘着性樹脂塗工面に孔開き材料を載せ、孔開き材料の上面に吸収体を載せ、低粘着性樹脂を孔開き材料の底面から内部に浸透させ孔開き材料の上面に至らせることで孔開き材料と吸収体とを低粘着性樹脂により接着すると共に、孔開き材料及び吸収体に低粘着性樹脂を被覆する工程
(P3)低粘着性樹脂を加熱硬化させる工程
20 孔開き材料
21 貫通孔
30 吸収体
31 貫通孔と対向する部分
40,52 シリコーン樹脂
50,51 カバー材
60 剥離シート
70 荷重
孔開き材料20の上面、底面、及び貫通孔21の内周面22は、貫通孔21の孔全部が塞がれることがないように孔の少なくとも一部(本実施形態では貫通孔の全部)を残してゲル状の粘着性シリコーン樹脂40で被覆される。すなわち、本発明の傷手当用品10は、孔開き材料の底面側から吸収体30の内部へ血液、滲出液等の液体が通過し得るように、孔開き材料20の上面から底面を貫通する孔の少なくとも一部(本実施形態では貫通孔の全部)を残したままシリコーン樹脂40が孔開き材料20を被覆する構成を有する。なお、後述するように、通常は、傷手当用品の使用前におけるシリコーン樹脂被覆層および孔開き材料の保護用材料として、図示しない剥離シートが、シリコーン樹脂40の底面側に設けられる。
また、吸収体30においては、孔開き材料20の貫通孔21と対向する部分31の一部が、孔開き材料の底面側から吸収体内部へ血液、滲出液等の液体が通過することを阻害しない程度にゲル状の粘着性シリコーン樹脂で被覆されている。吸収体30として、後述するように、例えば、不織布を用いた場合、不織布の一部にシリコーン樹脂がからんで付着し、残りの部分には、シリコーン樹脂が付着せずに液体が通過可能な状態となるように、シリコーン樹脂で不織布の一部が被覆される。
また、孔開き材料20は、貫通孔21の全部がシリコーン樹脂で塞がれないようにシリコーン樹脂で被覆されることが好ましいが、吸収体内部への通液を阻害しなければ貫通孔21の一部がシリコーン樹脂で塞がれていても良い。
また、孔開き材料20と吸収体30との接着は、アクリル系粘着剤、ゴム系粘着剤、ポリウレタン系粘着剤等のシリコーン樹脂以外の粘着剤で接着してもよいし、熱溶着により接着してもよい。
図2の実施形態は、図1で示した実施形態と、カバー材51が異なる。即ち、カバー材51は、液体不浸透性且つ水蒸気透過性のプラスチックフィルムからなり、その底面に粘着性のシリコーン樹脂52が被覆され、更にその外周縁が吸収体30の外周縁より外側に伸びている。この傷手当用品を患部に固定した際には、前記の外側に伸びた部分が吸収体以下の部材を覆う状態となる。
従って、図2の実施形態によれば、カバー材51により、簡便に患部に傷手当用品を固定でき、滲出液が過剰な場合でも吸収体の外周縁から滲出液が漏れ出ることを防止でき、さらに傷を適度な湿潤環境に保つことができるので創治癒促進をはかることができる。
また、上記図1~3に示した実施態様では、孔開き材料及び吸収体を被覆す低粘着性樹脂としてシリコーン樹脂を用いた例を示したが、シリコーン樹脂以外の低粘着性樹脂を用いる態様にしてもよい。
本発明の傷手当用品は、P1、P2(P2A)、P3の工程を順次経て製造される。なお、図5は、前記各工程を連続的に行なう状態を模式的に示す図であり、各工程は、実質的に図4と同様である。
P1の工程は、剥離シート60にシリコーン樹脂40を塗工する工程である。剥離シートとしては、シリコーン系やフッ素系の剥離剤により処理された剥離紙、剥離フィルム、又はポリカーボネート、ポリビニルアルコール、セロハン、ウレタン等のフィルムを使用することができる。
P2の工程では、P1の工程により塗工した硬化前のシリコーン樹脂塗工面40に孔開き材料20を載せ、さらに孔開き材料20の上面に吸収体30(この吸収体はカバー材50を予め吸収体の上面に積層しておくことも可能である)を載せる。この際、シリコーン樹脂、孔開き材料、及び吸収体の積層は、図4および図5に示すようにほぼ同時に行っても良いし、孔開き材料を先にシリコーン樹脂上に供給し、次いで吸収体を供給するようにしてもよい。このように、シリコーン樹脂上に孔開き材料を載置し、さらにその上に吸収体を載置することで、孔開き材料の貫通孔以外の部分と、吸収体の孔開き材料の貫通孔に対向する部分にシリコーン樹脂が被覆される。
なお、このP2の工程としては、次に示すP2Aの工程が特に好ましい。P2Aの工程では、先ずP2の工程と同様に硬化前のシリコーン樹脂塗工面40に孔開き材料20を載せ、孔開き材料20の上面に吸収体30を載せる。次いで、これらの積層物に適当な荷重70を加えるなどして、シリコーン樹脂40を孔開き材料20の底面から内部に浸透させ孔開き材料の上面に至らせることで孔開き材料20と吸収体30とをシリコーン樹脂40により接着する。また、この孔開き材料20と吸収体30の接着と同時に、孔開き材料の貫通孔部分に存在するシリコーン樹脂を吸収体表面に吸収させ、吸収体の孔開き材料の貫通孔と対向する部分にシリコーン樹脂を被覆する。即ち、P2Aの工程は、孔開き材料の貫通孔を塞がずに孔開き材料をシリコーン樹脂で被覆するとともに、吸収体にもシリコーン樹脂を被覆し、さらに、孔開き材料と吸収体との接着も同時に達成することができる工程である。
P3の工程は、P2(P2A)の工程により孔開き材料と吸収体に塗工したシリコーン樹脂を加熱硬化させる工程であり、未硬化で液状のシリコーン樹脂がこの工程を経て硬化し、本発明の傷手当用品10が完成する。
なお、シリコーン樹脂の種類や塗工量、孔開き材料と吸収体の種類、荷重の程度等をコントロールすることにより、本発明の種々の実施形態を製造することができる。
また、本発明の傷手当用品は、上記以外の方法でも製造することができ、例えば、孔開き材料を未硬化のシリコーン樹脂に浸漬し、余分なシリコーン樹脂を搾った後その上に吸収体を載せ、シリコーン樹脂を加熱硬化させ、その後スプレー等によりシリコーン樹脂を吹き付け、吸収体の孔開き材料の貫通孔と対向する部分をシリコーン樹脂で被覆する方法がある。
また、上記図4、5に示した本発明の製造方法の実施態様では、孔開き材料及び吸収体を被覆す低粘着性樹脂としてシリコーン樹脂を用いた例を示したが、シリコーン樹脂以外の低粘着性樹脂を用いる場合も同様の方法で実施できる。
本発明の傷手当用品に使用する孔開き材料は、上面及び底面を有し、底面側が傷に対向する面となる。孔開き材料は、上面から底面に連通する複数の貫通孔を有することが必要である。傷からの血液、滲出液などを、孔開き材料の貫通孔を通して吸収体に吸収させるためである。
孔開き材料に設ける貫通孔の平均断面積は、孔開き材料の表面において空孔1つ当たり0.01~10mm2であることが好ましく、0.1~5mm2であることが更に好ましい。貫通孔の平均断面積が0.01mm2より小さいと、シリコーン樹脂で孔開き材料を被覆する際、シリコーン樹脂が孔開き材料の貫通孔を塞ぎ、滲出液が孔開き材料から吸収体に移動しなくなる恐れがある。また、貫通孔の平均断面積が10mm2より大きいと、孔開き材料と創面との十分な接触面積が得られず、傷手当用品の傷に対する密着性が低下し滲出液が漏れる場合がある。
本発明の孔開き材料において、貫通孔の開孔率は、5~70%であることが好ましく、15~50%であることが更に好ましい。貫通孔の開孔率が5%より小さいと、滲出液が孔開き材料から吸収体に移動しなくなる恐れがあり、70%より大きいと孔開き材料と創面との十分な接触面積が得られず、傷手当用品の傷に対する密着性が低下し滲出液が漏れる場合がある。
特に好適な孔開き材料は、貫通孔の平均断面積が0.1~1mm2であり、且つ、貫通孔の開孔率が15~40%の範囲にあるものである。
また、孔開き材料の厚さは、滲出液の吸収体への移動性と創面への非固着性の観点から、0.05~0.7mmの範囲であることが好ましい。
孔開き材料は、これら材料の一種類を単独で使用してもよいし、同一又は異なる種類の材料をラミネートした積層構造のものであってもよい。
孔開き材料に用いる編布としては、経編及び緯編の各種編組織が利用できる。特に好適な編布は、平編生地、ゴム編生地、トリコット生地、ラッシェル生地である。織布は、平織、綾織及び朱子織のいずれであってもよい。不織布は、フリース形成法として、乾式法、湿式法及びスパンボンド法のいずれを使用したものであってもよく、繊維結合が、スパンレース法、ニードルパンチ法、ケミカルボンド法、ポイントシール法、サーマルボンド法等のいずれの方法で形成されたものであってもよい。
ネットは、複数の長繊維を網目が形成されるように適当な間隔をあけて配置し、これを熱融着や接着剤等の結合手段により繊維同士を結合して形成したものを使用できる。
編布、織布、不織布、ネット等の繊維状材料を構成する糸としては、モノフィラメント、マルチフィラメント、撚糸、カバードヤーン、コアヤーン等が利用でき、伸縮加工や嵩高加工等を施したものを利用してもよい。
繊維の種類も特に限定されず、ポリエステル系繊維、アクリル系繊維、ポリアミド系繊維、ポリウレタン系繊維、セルロース系繊維(綿、レーヨン、ポリノジック、リヨセル)、ポリオレフィン系繊維、ポリ塩化ビニル系繊維、ポリ塩化ビニリデン系繊維、ガラス繊維、カーボンファイバー繊維等が利用できる。
特に好ましい繊維材料は、熱可塑性のポリエステル系繊維、アクリル系繊維及びポリアミド系繊維である。
孔開き材料の貫通孔は、編布の編目による貫通孔、繊維の組織(糸の太さ、密度等を含む)のバランスにより布表面に生じる貫通孔、織布の経糸と緯糸の間に形成される空隙等の繊維材料が本来有するものであってもよいし、後加工で物理的に穿孔した貫通孔であってもよい。
これらの中でも、編布のループによる貫通孔又は編組織(糸の太さ、密度等を含む)のバランスにより布表面に生じる貫通孔は、繊維材料自体に人体へのフィット性があり、シリコーン樹脂層を塗布した際に貫通孔が閉塞され難いので、好適である。
本発明の傷手当用品に使用する吸収体は、傷からの血液、滲出液を吸収、保持するためのものであり、孔開き材料の上面に配置される。
吸収体は、不織布、編布、織布等の繊維状材料、フォーム材料、吸収性樹脂材料、吸水性粉末材料などからなるものを使用することができ、繊維状材料、フォーム材料が好ましい。吸収体は、これら材料の一種類を単独で使用してもよいし、同一又は異なる種類の材料をラミネートした積層構造のものであってもよい。
特に、繊維状材料からなるものが好ましく、セルロース系繊維(綿、レーヨン、ポリノジック、リヨセル)、ポリエステル系繊維、アクリル系繊維、ポリアミド系繊維、ポリウレタン系繊維、又はこれらの混合繊維が好適な繊維材料である。また、これらの繊維材料中に、吸収性樹脂材料、吸水性粉末材料などの吸水性の高い材料を混ぜ込むことができ、必要とされる吸収量を適宜調整することができる。
また、吸収体を構成する材料として、吸水時にゲルを形成する物質を含ませることが好ましく、このような材料を使用することで、創傷を湿潤状態に保ち、傷の治癒を促進することができる。ゲル形成材料としては、ナトリウムカルボキシメチルセルロース、ナトリウムカルボキシメチルセルロースの架橋物、デンプン-アクリル酸(塩)グラフト共重合体、アクリル酸(塩)重合体、デンプン-アクリロニトリル共重合体、多価アルコール等が好ましい。
本発明の傷手当用品に使用する低粘着性樹脂は、特に限定されず、本発明の傷手当用品を患部に適用して除去する際に、皮膚や傷に過度な刺激や損傷を与えない程度の粘着性を有しているものであればよい。なお、本発明における、低粘着性樹脂には、天然又は合成で得られる高分子物質及びこれら複数の混合物、並びにこれらの高分子物質にそれ以外の物質を加えたものを含むものとする。本発明に用いる低粘着性樹脂は、疎水性、親水性いずれでもよく、また、適当な液状物質と組合せて、オルガノゲルやハイドロゲルの形態として用いることができる。また、親水性高分子化合物とブレンドして、いわゆる、ハイドロコロイドの形態として用いることもできる。低粘着性樹脂としては、特に、疎水性樹脂であることが好ましく、疎水性ゲルの形態で用いることが好ましい。疎水性樹脂の材料としては、その樹脂で形成した層の表面と水との接触角が65°以上になるものを選択すればよく、例えば、シリコーン樹脂、アクリル樹脂、メタクリル樹脂、ポリ塩化ビニル樹脂、ポリ塩化ビニリデン樹脂、フッ素樹脂、オレフィン樹脂、ポリエステル樹脂、スチレン樹脂、ウレタン樹脂、ポリアミド樹脂、及びこれらの混合物等を挙げることができる。特に、シリコーン樹脂を含む材料からなるものが好ましい。接触角の測定は、接触角計CA-A(協和界面科学社製)を使用して該接触角計の取扱説明書「液滴法測定操作」に準拠して測定することができる。
本発明の傷手当用品に使用する低粘着性樹脂として好適なシリコーン樹脂は、傷に対する固着性を低減するために、孔開き材料の少なくとも底面と、吸収体の孔開き材料の貫通孔と対向する部分に被覆される。
本発明で用いるシリコーン樹脂は、取り扱いの簡便性と、傷に対する固着性の観点から、粘着性を有するゲル状物質であることが好ましい。
シリコーン樹脂は、特に限定されず、付加反応型、過酸化反応型、又は縮合反応型のいずれを使用してもよいが、付加反応型のシリコーン樹脂が好ましい。
付加反応型シリコーン樹脂は、ケイ素原子に結合したアルケニル基を有するオルガノポリシロキサン(アルケニル基含有オルガノポリシロキサン)とヒドロシリル基(Si-H)を有するオルガノポリシロキサン(ハイドロジェンオルガノポリシロキサン)とを、塩化白金酸等の白金化合物触媒を用いて、付加反応(ヒドロシリル化反応)させたものである。
付加反応型シリコーン樹脂は、その合成に用いるオルガノハイドロジェンポリシロキサンの量や、オルガノハイドロジェンポリシロキサン分子内のヒドロシリル基(Si-H)の量を変化させることによって、架橋密度を調整することができる。これにより、シリコーン樹脂の硬さや粘着力を容易に調整することができる。本発明に使用する付加反応型シリコーン樹脂としては、ビニル基置換ポリジメチルシロキサンとオルガノハイドロジェンポリシロキサンとの付加反応物であることが好ましい。
シリコーン樹脂は、一種類を単独で使用しても、二種類以上を組み合わせて使用してもよい。シリコーン樹脂は、架橋等により硬化されていることが好ましい。シリコーン樹脂の硬化方法は、特に限定されず、加熱等により容易に架橋させることができる。
吸水性高分子化合物、pH調整剤としては公知のものを使用することができる。
本発明の傷手当用品は、吸収体の汚染防止、傷手当用品の取り扱い性、吸収体からの汚染物質脱落防止の観点から、吸収体の上面にカバー材を被覆することが好ましい。
カバー材は、傷からの滲出液の量や使用する場面にあわせて選択することができ、滲出液の量が多い場合は液体浸透性の材料を用いるのが好ましく、滲出液の量がそれほど多くない場合は、液体不浸透性且つ水蒸気透過性の材料を用いるのが好ましい。
また、カバー材は、底面に粘着剤を被覆すると共に、その外形を孔開き材料及び吸収体よりも大きく形成することで、孔開き材料及び吸収体の外周縁より外側にでた部分により、患部に粘着固定することが可能となる。
カバー材の底面を被覆する粘着剤としては、孔開き材料及び吸収体を被覆するシリコーン樹脂と同様のものを使用できるが、例えば、アクリル系粘着剤、ゴム系粘着剤、吸水性高分子を含有する所謂ハイドロコロイド粘着剤等のシリコーン樹脂以外の粘着剤を用いることもできる。
カバー材の材料としては、不織布、編布、織布、ネット等の繊維状シート、合成樹脂フィルム、フォーム等をあげることができ、これら材料の適宜選択により液体浸透性の程度をコントロールすることができる。
本発明の傷手当用品は、孔開き材料の少なくとも底面が、貫通孔全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆される。孔開き材料の底面側から吸収体内部へ液体が通過するのであれば孔開き材料の貫通孔の一部が低粘着性樹脂で塞がれても良いが、貫通孔の60%以上が低粘着性樹脂で塞がれることなく貫通部分を残していることが好ましく、貫通孔の80%以上が残っていることが更に好ましく、貫通孔のほぼ全部が低粘着性樹脂で塞がれずに残っていることが特に好ましい。特に、孔開き材料の底面のほぼ全面が、貫通孔のほぼ全部が塞がれることがないように貫通孔のほぼ全部を残して低粘着性樹脂で被覆されることが好ましい。孔開き材料の貫通孔が低粘着性樹脂により塞がれないため、孔開き材料の底面側から吸収体内部への滲出液の通過が可能となる。
孔開き材料は、傷への固着性を低減するために、その上面も低粘着性樹脂で被覆されることが好ましく、貫通孔の内周面を含めた孔開き材料の全表面を低粘着性樹脂で被覆されることがより好ましい。
また本発明の傷手当用品は、吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆される。ただし、吸収体を低粘着性樹脂で被覆をしたとしても、開き材料の底面側から吸収体内部へ血液、滲出液等の液体が通過し得ることが必要である。そのような液体の通過を可能とするためには、吸収体の孔開き材料の貫通孔と対向する部分が、液体が通過することを阻害しない程度に低粘着性樹脂で被覆されていることが好ましい。
吸収体は、孔開き材料の60%以上の貫通孔と対向する部分が、低粘着性樹脂で被覆されていることが好ましく、孔開き材料の80%以上の貫通孔と対向する部分が、低粘着性樹脂で被覆されていることがさらに好ましく、孔開き材料のほぼ全部の貫通孔と対向する部分が、低粘着性樹脂で被覆されていることが特に好ましい。このような割合で吸収体に低粘着性樹脂を被覆することで、傷への局所的な付着、組織損傷を防ぎ、傷接触面全体で剥離刺激を抑えることができる。
吸収体を被覆する低粘着性樹脂の量は、5~150g/m2である事が好ましく、15~100g/m2が更に好ましい。吸収体を被覆する低粘着性樹脂の量が5g/m2より少ないと、吸収体と傷との固着を防ぐことが困難になり、150g/m2より多いと、低粘着性樹脂が吸収体の空孔部分を塞いでしまい滲出液の吸収が効率良く行なわれない可能性がある。
なお、孔開き材料と吸収体の両方を含めた傷手当用品全体に付着させる低粘着性樹脂の量は、150~350g/m2であることが好ましく、170~250g/m2が更に好ましい。150g/m2より少ないと、傷との固着を防ぐことが困難になり、孔開き材料の内部に低粘着性樹脂を浸透させ孔開き材料と吸収体とを接着することが困難となる。また、350g/m2より多いと、低粘着性樹脂が孔開き材料の貫通孔と吸収体の空孔部分を塞いでしまい滲出液の吸収が効率良く行なわれなくなる可能性がある。
本発明の傷手当用品の粘着力は、0.1~1.5N/25mmであることが好ましく、0.15~1.2N/25mmであることが更に好ましい。傷手当用品の粘着力が0.1N/25mmより低いと患部への密着性が損なわれる恐れがあり、1.5N/25mmより高いと、傷手当用品の交換時に創傷面を損傷してしまう恐れがある。なお、上記図2の実施形態のように、吸収体の外周縁より延出させた粘着性のカバー材を設ける場合は、本発明の傷手当用品に使用する低粘着性樹脂を、粘着性がほとんど発揮されないように構成してもよい。
また、本発明の傷手当用品に関する特性は、以下の方法により測定した。
孔開き材料の底面を垂直方向(底面と直交する方向)から顕微鏡にて観察し、5個の貫通孔の断面積を測定して、その平均値を求める。
孔開き材料の底面を垂直方向(底面と直交する方向)から顕微鏡にて観察し、一定面積内で何個の孔が存在するか数え、上記で算出した断面積の平均値を基に求める。
JIS L 1096「一般織物試験方法」に準じて、低粘着性樹脂を被覆する前の厚さを測定する。
JIS Z 0237-2000「180度引き剥がし粘着力」に準じて測定する。ただし、被着体にはベークライト板を使用する。
傷手当用品を作製する前に、低粘着性樹脂が被覆される前の吸収体の重量を予め測定しておく(W1)。傷手当用品を作製後、孔開き材料と吸収体を分離し、再度重量を測定する(W2)。W1とW2の重量変位から単位面積あたりの吸収体の低粘着性樹脂被覆量(g/m2)を算出する。
図4で説明したP1、P2A、P3の工程を経る製造方法に従い作製した。具体的には、次の通りである。
ビニル基置換ポリジメチルシロキサン、オルガノハイドロジェンポリシロキサン及び白金触媒を主体とする2成分型の付加反応型シリコーン樹脂(ダウコーニング社製、商品名「DOW CORNING 7-9800」)を混合し、得られた混合液をシリコーン剥離シートに一定の厚さで塗工した。次いで、塗工したシリコーン樹脂上に、ポリエステル製のトリコット編かなる孔開き材料と、レーヨン繊維等を含む不織布からなる吸収体を供給する。それから、シリコーン樹脂、孔開き材料、及び吸収体からなる積層体に一定の荷重を加え、孔開き材料と吸収体をシリコーン樹脂で被覆すると共に、孔開き材料と吸収体をシリコーン樹脂により接着する。その後、110℃で2分間加熱し、シリコーン樹脂を硬化させ、本発明の傷手当用品を得た。得られた傷手当用品の孔開き材料側からの拡大図を図6に示す。図6によれば、吸収体の不織布の一部にシリコーン樹脂がからんで付着し、残りの部分には、シリコーン樹脂が付着せずに液体が通過可能な状態となっていることがわかる。
吸収体をポリウレタンフォームに代える以外は、実施例1と同様の方法で傷手当用品を得た。得られた傷手当用品の孔開き材料側からの拡大図を図7に示す。図7においても、吸収体のポリウレタンフォームの一部にシリコーン樹脂がからんで付着している状態がわかる。
孔開き材料の底面にのみシリコーン樹脂を被覆する以外は、実施例1と同じ構成で傷手当用品を作成した。即ち、比較例1の傷手当用品は、吸収体の孔開き材料の貫通孔と対向する部分がシリコーン樹脂で被覆されていない。得られた傷手当用品の孔開き材料側からの拡大図を図8に示す。
6週齢のオスSDラットの左側腹部に直径3cmの全層皮膚欠損層を作製する。作製した傷部に滅菌済みの傷手当用品を被覆し、その上から弾性包帯を巻いて固定する。傷を作製してから2日後、9日後に傷から傷手当用品を剥離し、その固着状況を観察する。
比較例1で得られた傷手当用品では、2日後、孔開き材料のシリコーン樹脂被覆面では固着は見られなかったものの、孔開き材料の貫通孔部分で軽い固着を生じた。また剥離後の創面を観察すると創面が孔開き材料の形状に沿って凹凸を生じている様子が観察できた。
この結果は、SDラットの創傷部の肉様膜組織が孔開き材料の貫通孔から侵入し吸収体に固着したために生じたものと推測される。9日後では、さらに強い固着を孔開き材料の貫通孔部分で生じた。傷手当用品を創面から引き剥がしたところ、創面から多量の出血が確認された。この結果は、2日後の場合と同様に新生した肉芽組織が貫通孔部から侵入し、吸収体の繊維を取り込み固着したために生じたものと推測される。結果を図9に示す。
一方、実施例1で得られた傷手当用品では、2日後、全く固着を生じることなく剥離することができた。剥離後の創面も全く凹凸を生じていない。9日後では、孔開き材料の貫通孔部分で軽い固着を生じたものの、剥離後の創面からの出血はほとんど確認できなかった。実施例1と比較例1との構成の違いは、吸収体の孔開き材料の貫通孔と対向する部分の一部をシリコーン樹脂で被覆する点である。従って、本願発明が肉様膜及び肉芽組織による固着に対し有効であることが確認された。結果を図10に示す。
Claims (11)
- 上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備えた傷手当用品において、
孔開き材料の少なくとも底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、
吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、
孔開き材料の底面側から吸収体内部へ液体が通過し得るようにしたことを特徴とする傷手当用品。 - 上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備えた傷手当用品において、
孔開き材料の上面及び底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、
吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、
孔開き材料と吸収体とが、孔開き材料の上面に位置する低粘着性樹脂により接着され、
孔開き材料の底面側から吸収体内部へ液体が通過し得るようにしたことを特徴とする傷手当用品。 - 低粘着性樹脂がシリコーン樹脂であることを特徴とする請求項1又は2に記載の傷手当用品。
- 低粘着性樹脂が、粘着性ゲルであることを特徴とする請求項1~3のいずれか1項に記載の傷手当用品。
- 低粘着性樹脂が、孔開き材料の底面から内部に浸透し孔開き材料の上面に至っていることを特徴とする請求項1~4のいずれか1項に記載の傷手当用品。
- 吸収体の孔開き材料の貫通孔と対向する部分が、孔開き材料の底面側から吸収体内部へ液体が通過することを阻害しない程度に低粘着性樹脂で被覆されていることを特徴とする請求項1~5のいずれか1項に記載の傷手当用品。
- 孔開き材料の底面のほぼ全面が、貫通孔のほぼ全部が塞がれることがないように貫通孔のほぼ全部を残して低粘着性樹脂で被覆され、吸収体の孔開き材料のほぼ全部の貫通孔と対向する部分が、低粘着性樹脂で被覆されていることを特徴とする請求項1~6のいずれか1項に記載の傷手当用品。
- 孔開き材料が、0.01~10mm2の貫通孔平均断面積と、5~70%の開孔率とを備えることを特徴とする請求項1~7のいずれか1項に記載の傷手当用品。
- 上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備え、孔開き材料の少なくとも底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、孔開き材料の底面側から吸収体内部へ液体が通過し得るようにした傷手当用品の製造方法であって、
(P1)剥離シートに低粘着性樹脂を塗工する工程、
(P2)硬化前の低粘着性樹脂塗工面に孔開き材料を載せ、孔開き材料の上面に吸収体を載せ、孔開き材料及び吸収体に低粘着性樹脂を被覆する工程、
(P3)低粘着性樹脂を加熱硬化させる工程、
からなることを特徴とする傷手当用品の製造方法。 - 上面及び底面を有し複数の貫通孔を有する孔開き材料と、孔開き材料の上面に配置される吸収体とを備え、孔開き材料の上面及び底面が、貫通孔の全部が塞がれることがないように貫通孔の少なくとも一部を残して低粘着性樹脂で被覆され、吸収体の孔開き材料の貫通孔と対向する部分の少なくとも一部が、低粘着性樹脂で被覆され、孔開き材料と吸収体とが、孔開き材料の上面に位置する低粘着性樹脂により接着され、孔開き材料の底面側から吸収体内部へ液体が通過し得るようにした傷手当用品の製造方法であって、
(P1)剥離シートに低粘着性樹脂を塗工する工程、
(P2A)硬化前の低粘着性樹脂塗工面に孔開き材料を載せ、孔開き材料の上面に吸収体を載せ、低粘着性樹脂を孔開き材料の底面から内部に浸透させ孔開き材料の上面に至らせることで孔開き材料と吸収体とを低粘着性樹脂により接着すると共に、孔開き材料及び吸収体に低粘着性樹脂を被覆する工程、
(P3)低粘着性樹脂を加熱硬化させる工程、
からなることを特徴とする傷手当用品の製造方法。 - 低粘着性樹脂がシリコーン樹脂であることを特徴とする請求項9又は10に記載の傷手当用品の製造方法。
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Also Published As
Publication number | Publication date |
---|---|
EP2433594A4 (en) | 2014-03-12 |
EP2433594A1 (en) | 2012-03-28 |
US8377015B2 (en) | 2013-02-19 |
JP5286481B2 (ja) | 2013-09-11 |
JPWO2010122665A1 (ja) | 2012-10-22 |
US20110160686A1 (en) | 2011-06-30 |
CN101969902A (zh) | 2011-02-09 |
KR101086653B1 (ko) | 2011-11-24 |
CN101969902B (zh) | 2013-02-13 |
EP2433594B1 (en) | 2016-06-01 |
KR20100137345A (ko) | 2010-12-30 |
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