KR20110045734A - A method for manufacturing of poly vinyl alcohol sponge the insertion type that has poly vinyl alcohol film coated in cavity of the body - Google Patents

Abstract

PURPOSE: A method for manufacturing a human body insertion type poly vinyl alcohol sponge is provided to remove a sponge without the pain of a patient after use of the sponge. CONSTITUTION: A method for manufacturing a human body insertion type poly vinyl alcohol sponge comprises: a step(S300) of forming a film on the upper and lower surfaces and lateral surface of PVA sponge; a step(S400) of removing a constant area of both sides of the PVA sponge; and a step(S500) of compressing the PVA sponge. The PVA film is formed so that a partial area thereof can be exposed to the outside.

Description

TECHNICAL FIELD [0001] A METHOD FOR MANUFACTURING OF POLY VINYL ALCOHOL SPONGE THE INSERTION TYPE THAT HAS POLY VINYL ALCOHOL FILM COATED IN CAVITY OF THE BODY}

The present invention relates to a method for producing a polyvinyl alcohol (PVA) sponge, and more particularly to a method for preparing a co-insertion type PVA sponge having a PVA film.

PVA sponge is a porous material with continuous open-cell structure. It has strong absorbency, weather resistance, durability, and chemical resistance, and is easy to adjust pores and specifications. Excellent performance, such as no coating.

Due to this performance, PVA sponges are favored in many fields such as medical, industrial, sports, automotive, and pet dogs. Also, due to the minimization of skin irritation, PVA sponges can be used in various colors, from industrial products to general household goods and advanced materials, depending on the purpose of use. It is used in many fields in the form.

In particular, the soft PVA sponge is effective when used in medical applications such as plastic surgery, surgical surgery and medical surgery. During or after surgery, it can relieve the pain of the patients, and also helps a lot during the surgery and recovery. PVA sponges for medical use have been used for packing in cavities such as the nasal cavity and ears, ie to block the cavity in the body. At this time, the materials of the wound care articles for this packing require a high absorption rate and should be able to easily remove the packing from the patient without pain or traumatic symptoms.

However, conventional PVA sponges have a PVA sponge stuck to the surface of the skin tissue, which is difficult to remove the packing. That is, in the porous PVA sponge, blood and exudate, which is crushed by surgical treatment or trauma, seep into the surface of the skin tissue, and the coagulated blood and exudate form a mechanical bond in the sponge pores. When removing the PVA sponge adheres to the surface of the skin tissue by this binding.

As one of methods for solving such a phenomenon, a method of applying a lubricating gel, cream, and ointment to the packing surface and then inserting it jointly is used. However, it does not prove a great effect with respect to the property of absorbing blood or exudate to the packing material or the adhesion property between the skin tissue and the sponge, and there is still a problem of causing pain.

The present invention has been proposed to solve the above problems of the proposed methods, while reducing the necrosis of the tissue that may be caused by the coagulation of the sponge and wound area, while absorbing the blood better, even after using the sponge It is an object of the present invention to provide a method for producing an intracorporeal co-inserted PVA sponge having a PVA film so that the sponge can be removed without pain of the patient.

Method for producing a cavity-insertable PVA sponge having a PVA film according to the characteristics of the present invention for achieving the above object,

(1) forming a PVA sponge having a top surface, a bottom surface and a side surface; And

(2) forming a PVA film on the PVA sponge formed in step (1),

The PVA film is characterized in that its configuration is formed such that a portion of the upper surface, the lower surface and the side surface of the PVA sponge is exposed to the outside.

Preferably, the PVA film,

Top and bottom surfaces of the PVA sponge may be formed only on the side of the PVA sponge to be exposed to the outside.

Preferably, the PVA film,

It may be formed only on the top and bottom surfaces of the PVA sponge so that the side of the PVA sponge is exposed.

Preferably, the step (2) is,

Forming a film on the top, bottom and side surfaces of the PVA sponge; And

It may include the step of removing both sides of the PVA sponge.

More preferably, the PVA sponge from which both fixed areas are removed,

The four corners can be rounded both vertically and horizontally.

More preferably, after step (2),

The method may further include compressing the PVA sponge.

The PVA sponge for intracorporeal co-insertion prepared according to the method for producing a PVA sponge having a PVA film, which is proposed in the present invention, reduces blood necrosis of the tissue which may be caused by coagulation at the wound site, and at the same time, blood is further increased. It can be absorbed well and the sponge can be removed without pain of the patient even after using the sponge.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a PVA sponge having a PVA film formed on its side according to an embodiment of the present invention. As shown in FIG. 1, the PVA sponge 100 having the PVA film 200 formed thereon according to an embodiment of the present invention includes a PVA sponge 100 having four corners having a round shape, and a side surface of the PVA sponge 100. It consists of the PVA film 200 formed in the.

Here, the PVA sponge 100 has a top and bottom surfaces that are flat to each other, and has a side surface connecting the top and bottom surfaces to each other. At this time, the top surface and the bottom surface is formed to have a wider area than the side, the long length both ends in the long axis direction has a round, that is, a round shape.

The PVA sponge 100 is a hydrophilic sponge having a continuous open structure synthesized and foamed using PVA as a main raw material, and will be described later in relation to a detailed manufacturing process of the PVA sponge 100.

Moreover, the PVA film 200 is formed along the side surface of the PVA sponge 100. For example, with regard to forming such a coating, a coating may be formed on the side by spraying using a cover covering the top and bottom surfaces during manufacturing. The PVA film 200 formed on the side is biodegradable and decomposed by bacteria found in the soil, and thus has been in the spotlight as a material for use sensitive to environmental protection. When a PVA film 200 is coated on the PVA sponge 100 and adhered to the wound site, permeability to absorb body fluid is good and adhesion to the wound or skin is easy.

2 is a view showing a PVA sponge having a PVA film formed on the top and bottom surfaces according to another embodiment of the present invention. As shown in Figure 2, both ends of the long axis direction is composed of a PVA sponge 100 having a round shape and a PVA film 200 formed on the top and bottom surfaces of the PVA sponge 100.

Here, the PVA sponge 100 has a top and bottom surfaces that are flat to each other, as described in FIG. 1, and has a side surface connecting the top and bottom surfaces to each other. The PVA sponge 200 is coated only on the top and bottom surfaces of the PVA sponge 100 of this type, and the side portions of the PVA sponge 100 are exposed to the outside. In addition, in relation to forming the coating as described above, it may be possible to form the coating by spraying only the top and bottom surfaces by using a cover that covers the side at the time of manufacture.

As such, the PVA sponge 100 having the PVA film 200 formed only on the top and bottom surfaces thereof has a wider surface area in which the PVA film 200 is formed on the PVA sponge 100, thereby directly contacting the skin with the PVA sponge ( It may be preferable in view of the necrotic tissue prevention than the PVA sponge 100 formed only on the side surface of the PVA film 200 described above is small because the area that 100 is touched.

3 is a view showing a PVA sponge in which a PVA film is formed only on a side surface of the cut sponge long axis according to another embodiment of the present invention. As shown in FIG. 3, the PVA sponge 100 in which the PVA film 200 is formed according to another embodiment of the present invention includes a rectangular shaped cut sponge 300b and a rectangular shaped cut sponge 300b. It consists of the PVA film 200 formed only in the cross section of the major axis direction of ().

Here, the cuboid-shaped cut sponge 300b is formed as a parallelepiped having each surface rectangular, and unlike in FIGS. 1 and 2, both ends of the long axis direction having a long length are straight rather than round, which will be described later. It is preferable to round in the vertical and horizontal directions as described above. The cuboid-shaped sponge 300b cuts a certain left side area 300a and a right side area 300c of the PVA sponge 100 in which the entire PVA film 200 is formed, thereby cutting only the rectangular shape sponge 300b. You can leave it. Since the PVA film cut | disconnected the whole thing, the PVA film 200 is not formed in the both sides of the long axis direction of the cuboid cut | disconnected sponge 300b.

As such, the PVA sponge 100 having the PVA film 200 formed only on a part thereof has a larger area than the PVA sponge 100 having the PVA film 200 formed only on the side surfaces or only on the top and bottom surfaces thereof. While forming the coating 200, the area exposed to the outside may be narrowed to reduce the area of direct contact with the skin, which may be more preferable to prevent necrosis.

1 to 3, the PVA film 200 is formed on a portion of the PVA sponge 100, so that a smooth surface can be maintained, thereby reducing blood coagulation and reducing skin tissue necrosis. The absorbency can be maintained, and the smooth surface can relieve the pain of the patient even when the sponge is removed.

FIG. 4 is a diagram illustrating a rounding process of four corners of a sponge from which both fixed areas are removed in FIG. 3. 4 shows four corners of the rectangular parallelepiped cut sponge 300b left by cutting a certain left area 300a and a right right area 300c of the PVA sponge 100 in which the entire PVA film 200 is formed in FIG. 3. It is rounded in both vertical and horizontal directions. Since both of the predetermined areas 300a and 300c of the PVA sponge 100 having the entire PVA film 200 are removed and rounded, both sides of the PVA sponge 100 in the long axis direction are removed. It consists of forms.

Since the PVA sponge 100 is intended to be inserted into the cavity of the human body, the corner portion that can be touched by the wound portion should have a smooth surface. Therefore, as shown in FIG. 4, all four corners of the corners are rounded after the PVA film 200 is formed. By rounding the four corners, it is possible to form a smooth and stable intimacy in appearance, and to reduce the pain caused by the sharp edges in the wound area or to directly irritate the wound.

5 is a view showing that the rounded PVA sponge of FIG. 4 is compressed. As shown in FIG. 5, the thickness of the PVA sponge 100 may be reduced by applying pressure to the PVA sponge 100 having a predetermined thickness with a predetermined force up and down.

When the four corners of the PVA sponge 100 are rounded and compressed, they are swollen in a state capable of exerting a sponge original function immediately when wet. The swollen PVA sponge 100 can be hemostatically adhered to the wound site to seal the wound, prevent bleeding from the wound site, and substantially prevent blood flow from the wound site.

PVA sponge 100 is a material excellent in cleaning delicate and sensitive surfaces because the elasticity or softness in wet state is equal to or better than natural sponges. Therefore, due to the softness and softness of the moisturizing properties, no scratches or scars are left on the skin tissue when wiping or rubbing the wound. In addition, by compressing the PVA sponge 100, since the volume can be reduced, it is possible to considerably reduce space and logistics costs such as movement and storage, and to compress to a size that is advantageous for inserting into a cavity having a small space, Sponge insertion may be easy.

6 is a flowchart illustrating a PVA sponge manufacturing process in which the PVA film is formed according to FIGS. 1 and 2, and FIG. 7 is a flowchart of the PVA sponge manufacturing process in which the PVA film is formed according to FIG. 3. 6 and 7, a process of manufacturing the PVA sponge 100 having the PVA film according to FIGS. 1, 2, and 3 will be described.

Forming the PVA film 200 so that a portion of the region is exposed to the outside may be formed only on the side, or may be formed only on the upper surface and the lower surface, as described in the above figures, the entire PVA sponge 100 After forming, both sides of the predetermined region may be cut to form the PVA film 200 only on both sides of the long axis direction in the cut sponge 300b having a rectangular parallelepiped shape.

According to the manufacturing method shown in Figure 6, it is possible to manufacture a PVA sponge in which the PVA film is formed only on the side as shown in Figure 1 of the present invention. The sponge manufacturing method according to an embodiment of the present invention shown in FIG. 6 includes a PVA sponge forming step (S100) and a PVA film forming step (S200), and may further include a PVA sponge compressing step. .

First, the step of forming a PVA sponge (S100) is made, let's briefly look at the PVA sponge 100 manufacturing method. The PVA sponge 100 forms an insoluble substance PVF (polyvinyl formal) by a formation reaction in which formaldehyde is fused to an aqueous PVA using inorganic substances such as hydrochloric acid and sulfuric acid as catalysts. In this step, the pore-forming agent is added to form pores, and after the insoluble PVF is completed, the pore-generating agent is extracted. The completed PVF is made of a porous body to form a three-dimensional hand net-shaped continuous pore structure to manufacture a PVA sponge 100. It is cut and processed to a suitable size, and has a flat top and bottom surfaces that are flat to each other, and a shape having sides that connect the top and bottom surfaces to each other. In addition, the PVA sponge 100 cuts both ends of a long longitudinal direction in a round shape.

PVA sponge 100 prepared as described above has a hydrophilic group OH group in the molecular structure is excellent hygroscopicity and water retention, strong capillary phenomenon is caused by the small pore structure, and wear resistance, tensile strength, tear strength and the like than any other sponge It has excellent lifespan because there is no aging phenomenon by ultraviolet rays. In addition, it is widely used in industrial materials due to its strong resistance to general organic solvents, acids, alkalis, etc., and by the developed process, pore size, porosity, etc. are adjusted to suit the purpose, and filters, rollers, bath sponges, blocks, etc. It is produced in various shapes according to the purpose and can be produced in various colors. In addition, it is an ideal material as a wiper or absorbent material for clean rooms because it does not generate static electricity during friction, and has the advantage of not leaving fibers or dust in itself due to its excellent tensile strength and tear strength.

After forming the PVA sponge 100 having the above advantages, the step (S200) of forming the PVA film 200 only on the side. The PVA film 200 may be separately formed only on the side surface, but after the PVA film 200 is formed on the upper and lower surfaces in advance before the PVA film 200 is formed, a film form that can be easily removed is attached, and then the PVA sponge The PVA film 200 is formed on the entire surface, and the top and bottom surfaces of the PVA sponge 100 are exposed to the outside while removing the film of the PVA film 200 formed on the top and bottom surfaces. It may be. In addition, the PVA film 200 may be sprayed in the form of a spray, or may be coated with the PVA film 200 in a liquid form.

Although not shown in FIG. 6, a step of drying the PVA film 200 after applying the PVA film 200 may be added. The PVA sponge 100, which has undergone a drying step, may be manufactured to form a PVA sponge 100 having a PVA film 200 formed only on a side surface thereof by compressing the PVA sponge 100 into a size that is easily inserted into a human cavity.

In addition, according to the manufacturing method shown in Figure 6, it is also possible to manufacture a PVA sponge in which the PVA film is formed only on the upper and lower surfaces as shown in Figure 2 of the present invention. Even in this case, the sponge manufacturing method according to an embodiment of the present invention shown in FIG. 6 is made of a PVA sponge forming step (S100) and a PVA film forming step (S200), and further PVA sponge 100 It may comprise a compression step.

In order to form the PVA film 200 only on the top and bottom surfaces of the PVA sponge 100 so that the side of the PVA sponge 100 is exposed to the outside, first, forming the PVA sponge 100 (S100) , Forming the PVA film 200 only on the top and bottom surfaces (S200). Here, although the PVA film 200 may be formed only on the top and bottom surfaces, the PVA film 200 may be easily attached to the PVA sponge 100, and then the PVA film 200 may be formed on the entire surface of the PVA sponge 100. The side surface of the PVA sponge 100 may be exposed to the outside, while forming and removing the film of the PVA film 200 part formed in the side surface.

Of course, after the PVA film 200 is coated on the top and bottom surfaces, a step of drying the PVA film 200 may be added. The PVA sponge 100, which has undergone a drying step, may be manufactured to form a PVA sponge 100 in which the PVA film 200 is formed only on the top and bottom surfaces thereof by compressing the PVA sponge 100 into a size that is easily inserted into the human cavity.

FIG. 7 illustrates a method of manufacturing a PVA sponge in which a PVA film is formed only at a portion except for a cut surface by removing a predetermined region on both sides as shown in FIG. 3. In order to form the PVA film 200 only in the longitudinal section of the cuboid-shaped cut sponge 300b, first, a step of forming the PVA sponge 100 is performed (S300), and an upper end of the PVA sponge 100 Forming the PVA film 200 on the entire surface, the bottom surface and the side is made (S400). As described above, the PVA sponge 100 having the PVA film 200 formed therein may be sprayed with the PVA film 200 or coated with the liquid PVA film 200.

Next, by cutting the left predetermined region 300a and the right predetermined region 300c of the PVA sponge 100 having the PVA coating 200 formed thereon, the step of removing the PVA coating 200 is performed (S500). . After cutting, both sides of the rectangular-shaped cut sponge 300b in the major axis direction are not formed with the PVA coating 200 by the two predetermined regions 300a and 300c, so that the surface is exposed to the outside.

Thus, the cut sponge 300b having a rectangular parallelepiped is subjected to the step S600 of rounding four corners in both the vertical direction and the horizontal direction. The PVA film 200 may be formed and rounded as in the present embodiment. As will be appreciated, when the left predetermined region 300a and the right predetermined region 300c of the entire film-forming sponge are cut, it is also possible to immediately cut into round shapes. This will reduce process steps and reduce manufacturing costs or material costs.

After the rounding process, a step (S700) of compressing the PVA sponge to a size advantageous to insert the PVA sponge 100 into the cavity may be performed.

Meanwhile, although three embodiments have been described regarding the method of forming the PVA film 200 to expose a portion of the PVA sponge 100, the PVA film 200 may be exposed to expose a portion of the PVA sponge 100 in various ways. Will be able to form.

The present invention described above may be variously modified or applied by those skilled in the art, and the scope of the technical idea according to the present invention should be defined by the following claims.

1 is a view showing a PVA sponge having a PVA film formed on the side according to an embodiment of the present invention.

2 is a view showing a PVA sponge having a PVA film formed on its upper and lower surfaces according to another embodiment of the present invention.

3 is a view showing a PVA sponge in which a PVA film is formed only on a side surface of the cut sponge long axis according to another embodiment of the present invention;

FIG. 4 is a diagram illustrating rounding of four corners of a sponge in which both sides of a predetermined region are removed.

5 is a view showing that the rounded PVA sponge 100 of FIG. 4 is compressed.

6 is a flowchart of a PVA sponge manufacturing process in which a PVA film according to FIGS. 1 and 2 is formed.

7 is a flowchart of a PVA sponge manufacturing process in which a PVA film according to FIG. 3 is formed.

<Explanation of symbols for main parts of the drawings>

S100: PVA sponge forming step

S200: PVA film forming step

S300: forming a PVA film on the entire PVA sponge

S400: step of removing both sides of the PVA sponge

S500: PVA sponge rounding process step

S600: PVA Sponge Compression Step

100: PVA sponge

200: PVA film

300a: left side area

300b: cuboid cut sponge

300c: right side area

Claims (6)

As a method for producing a co-insertion sponge having a poly vinyl alcohol (PVA) film, (1) forming a PVA sponge having a top surface, a bottom surface and a side surface; And (2) forming a PVA film on the PVA sponge formed in step (1), The PVA film, characterized in that the upper surface, the bottom surface and the side surface of the partial area of the PVA sponge is formed so as to be exposed to the outside, in-body cavity-insertable PVA sponge manufacturing method having a PVA film. The method of claim 1, The PVA film is formed on only the side of the PVA sponge so that the top surface, the bottom surface of the PVA sponge is exposed to the outside, in-body cavity-type PVA sponge manufacturing method having a PVA film. The method of claim 1, The PVA film is formed on the upper surface and the lower surface of the PVA sponge so that the side of the PVA sponge is exposed, characterized in that the PVA film having a PVA film. The method of claim 1, wherein step (2) comprises: Forming a film on the top, bottom and side surfaces of the PVA sponge; And And removing a predetermined region on both sides of the PVA sponge, the method for preparing a body-insertable PVA sponge having a PVA film. The method of claim 4, wherein And rounding the four corners of the PVA sponge in which both sides are removed, in both the vertical direction and the horizontal direction, further comprising a PVA film. The method of claim 1, After said step (2), further comprising the step of compressing the PVA sponge, a method for producing a body-insertable PVA sponge having a PVA film.

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