KR100862331B1 - Polypropylene multilayered absorbing fabric for medical use and manufacturing method thereof - Google Patents

Abstract

A medical polypropylene multi-layered absorbing fabric and a manufacturing method for the same are provided to prevent pollution of surrounding environment including medical workers and to block infection of viruses by rapidly absorbing and blocking blood or body fluids generated in operation by being used as a surgical drape. A medical polypropylene multi-layered absorbing fabric includes an upper layer(1), a middle layer(2) made of high-hydrophilic meltblown fabric, and a lower layer(4) made of a film. The upper layer is made of hydrophilic thermal bond fabric. The polypropylene multi-layered absorbing fabric further includes an intermediate layer(3) formed between the upper layer and the middle layer, and made of hydrophilic spun bond fabric. The spun bond fabric is manufactured by mixing 100 parts by weight of polypropylene and 0.03 - 0.04 parts by weight of anionic surfactant, melt-spinning the mixture, and self-bonding filament obtained by the melt-spinning.

Description

Polypropylene multilayered absorbing fabric for medical use and manufacturing method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical absorbent fabric, and in particular, to be used as a surgical fabric for surgical patients or for the purpose of absorbing blood or the like by sutured to the incision of the surgical fabric or for rapidly absorbing and blocking fluids generated during disinfection or treatment. The present invention relates to a medical polypropylene multilayer absorbent fabric having a function of preventing contamination of the surrounding environment including a medical staff and preventing infection and transmission of germs, and a method of manufacturing the same.

In general, during medical procedures, linen (cotton cloth) is used as a surgical fabric of a patient, and linen is repeatedly used after washing and disinfection, and is significantly exposed to contamination and infection due to residual bacteria in the fluid remaining after washing and disinfection. There was a problem that, when in use, excessive fluid occurs, it is not properly controlled (absorption and external pollution blocking).

While reducing the use of these unsanitary linen surgical fabrics, disposable surgical fabrics made from more hygienic nonwoven fabrics have begun to be used, but even these disposable nonwoven surgical fabrics have had limitations in controlling excessive fluid flow, and still remain disposable. There remains a need for an absorbent absorbent fabric, and there is still a need for developing an absorbent fabric capable of absorbing fluids such as blood and blocking the diffusion of the fluid.

This will be described in more detail as follows.

Polypropylene Spandex (Spanbond) nonwoven fabric has excellent characteristics such as economical efficiency, light weight, moldability, chemical resistance, and beautiful appearance, so it is widely used in sanitary materials, home appliances, office equipment packaging materials, automotive interior materials, disposable work clothes, etc. It is used.

In recent years, advances in medical knowledge, along with life sciences, have enabled the treatment of many diseases known as incurable diseases in the past. However, on the other hand, the increase in the elderly population susceptible to infection, the increase in chronic degenerative diseases, the increase in patients due to the use of anticancer and immunosuppressive agents, the increase in antibiotic-resistant bacteria due to prolonged use of antibiotics, the expansion of various implantation procedures, etc. As a result, infections in hospitals are increasing.

Hospital infections are cases in which an infection that did not appear at the time of hospitalization and that was not latent occurred during hospitalization. That is, it refers to an infection symptom caused by an endogenous microorganism that a person who has not been infected prior to hospitalization is exposed to pathogenic microorganisms in a hospital environment after hospitalization or the patient himself already has. In addition, hospital staff have a higher chance of being exposed to infection than general staff, and the infection rate is substantially higher. When hospital staff are infected, they should be considered not only in terms of employee health and well-being, but also in the protection of patients, as it facilitates the spread of infection as a repository for infection.

Employees who work in hospitals are likely to be exposed to communicable diseases in both the hospital and the community, and if they get sick, they can spread the disease to patients or other employees in the hospital where they work or to others in the community. You have the potential to do it. People who come in contact with patients or in direct contact with or dealing with patient specimens in hospitals have a greater chance of being exposed to pathogenic bacteria than the general environment. Therefore, in order to manage hospital infections, it is necessary to first understand the purpose of health management of employees who work in hospitals, the characteristics of infectious diseases frequently encountered by hospital staff, and management methods.

Hospitals should wear protective clothing if they can be contaminated with blood or other body fluids. Dental gowns, unlike general medical gowns and surgical gowns, have the property of being heavily contaminated through air. During medical practice, various contaminants, such as the body fluids of the patient, may be splashed through the air or exposed in the form of aerosols. Appropriate protective clothing should be worn to prevent such contaminants from contaminating the body, outer clothing, and the inside.In the operating room, as in the general medical service, gowns worn by the staff and drape for patients are not exposed to various contaminants such as body fluids. It should not be. Such protective clothing includes medical gowns, aprons, medical tops, medical outerwear, surgical gowns, etc., which are mainly made of linen such as cotton or cotton / polyester material. In 1978, however, the American Medical Association had already announced that linen was not suitable as a surgical gown. Contaminated linen surgical clothing and surgical patient drape are washed in a washing machine and sterilized and sterilized, but the water repellency and alcohol performance processed on the linen are deteriorated, so that they become wet during surgery. Wet protective gowns or drape of the patient during surgery is a potential risk, which can be life threatening. The ideal surgical gown should have good water and oil repellency and a clear blocking effect against microorganisms. In order to effectively protect patients and staff from communicable risks, surgical fabrics must serve as a clear barrier against pathogens and liquids.

In recent years, the barrier nonwoven fabrics used to solve the problem of linen can be used to prevent the penetration of bacteria and other contaminants and to be used in disposable medical products such as surgical fabrics and disposable gowns. It has been developed. For example, the spunlace nonwoven fabric is used for water-repellent, alcohol-alcohol treatment for disposable use as a surgical gown.However, it is a non-woven fabric made of short-fiber entanglement, which is weak in strength and weak in water pressure. There is still a problem that is easy to be exposed from the body fluids and various contaminants of the patient described above.

In addition, there is a need for a barrier product that is excellent in water repellency so that it does not get wet with blood or body fluids, and many studies have been conducted on it, but there are a number of patents. It is also desirable to use an absorbent cloth to absorb and block so that blood or body fluids can be less smeared on the floor of an operating room or other medical staff, and less diffused. There is also a need to develop a medical polypropylene multilayer absorbent cloth having such characteristics. .

An object of the present invention is to sew into the surgical fabric covering the patient, especially in the surgical incision site for the discharge of a large amount of blood or body fluid, such as in the case of surgery can be released in large quantities during surgery Provided is a medical polypropylene multilayer absorbent fabric and a method of manufacturing the same, which absorb and block blood or body fluid so as not to spread to the floor of an operating room or other medical staff.

In the medical polypropylene multilayer absorbent fabric according to the present invention, the upper layer, the middle layer, and the lower layer are formed by laminating a multi-layered absorbent fabric comprising a high hydrophilic meltblown nonwoven fabric as a middle layer and a film as a lower layer. It is made of a hydrophilic thermal bond nonwoven fabric, characterized in that it further comprises an intermediate layer consisting of a hydrophilic spunbond nonwoven fabric between the middle layer and the lower layer.

The hydrophilic thermal bond nonwoven fabric constituting the upper layer may be prepared by mixing in an amount of 0.04 to 0.06 parts by weight of anionic surfactant per 100 parts by weight of polypropylene, and melt-bonding it by applying heat or pressure or heat and pressure.

The high hydrophilic melt blown nonwoven fabric constituting the middle layer is mixed with 0.04 to 0.06 parts by weight of anionic surfactant per 100 parts by weight of polypropylene, and is extruded through a spinneret while being extruded at high speed from both sides of the spinneret. The micronized fibers can be laminated to a collector and formed into a self-bonding nonwoven fabric having high filter performance.

The hydrophilic spanbonded nonwoven fabric constituting the intermediate layer may be prepared by mixing in an amount of 0.03 to 0.04 parts by weight of anionic surfactant per 100 parts by weight of polypropylene, and self-bonding the long fibers obtained by melt spinning.

The diameter of the fibers constituting the meltblown nonwoven fabric constituting the middle layer may be within the range of 0.001 to 0.003 mm.

In addition, in the method for producing a medical polypropylene multilayer absorbent fabric of the present invention, in order to produce an absorbent fabric by laminating in the order of the upper layer, the middle layer, the middle layer, and the lower layer, (1) from 0.04 to 100 anionic surfactant per 100 parts by weight of polypropylene. Mixing at a rate of 0.06 parts by weight and melt-bonding the mixture by heat or pressure or heat and pressure to prepare a hydrophilic thermal bond nonwoven fabric; (2) mixing an anionic surfactant at a ratio of 0.03 to 0.04 parts by weight per 100 parts by weight of polypropylene, and self-bonding the long fibers obtained by melt spinning to prepare a hydrophilic spunbond nonwoven fabric; (3) 0.04 to 0.06 parts by weight of anionic surfactant per 100 parts by weight of polypropylene are mixed, and the ultrafine fibers micronized by the hot air sprayed at high speed from both sides of the spinneret are extruded through the spinneret, and then laminated on the collector. Forming a high hydrophilic meltblown nonwoven fabric by forming a self-bonding nonwoven fabric having a high filter performance; (4) A first layer in which a film is laminated as a lower layer using the hydrophilic spanbonded nonwoven fabric obtained in the above (2) as an intermediate layer and bonded at a pressure of 1200 to 1300 kgf / cm 2 and a temperature of 130 to 140 ° C. by calendering. Combining step; And (5) the hydrophilic thermal bond nonwoven fabric obtained in the above (1) as the upper layer and the high hydrophilic meltblown nonwoven fabrics obtained in the above (3) as the middle layer on the laminate obtained in the first bonding step of (4). And sequentially stacking and bonding the second bonding step of bonding at a temperature of 80 to 90 ° C. at a pressure of 1100 to 1200 kgf / cm 2 by calendering.

In the first coupling step (4), the coupling may be performed using a pair of planar rolls having no protruding shape.

In the second coupling step (5), the coupling may be performed using a flat roll having no protrusion shape and a piece roll having a protrusion shape.

According to the present invention there is an effect of providing a medical polypropylene multi-layer absorbent fabric and a method of manufacturing the same can be used as a surgical fabric for the surgical patient or the suture of the surgical fabric to absorb the blood and the like.

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

As shown in Fig. 1, the medical polypropylene multilayer absorbent fabric according to the present invention is formed by laminating an upper layer (1), a middle layer (2) and a lower layer (4), and as a middle layer (2) a high hydrophilic melt blown nonwoven fabric In the multi-layered absorbent fabric comprising a film as the lower layer 4, the upper layer 1 is made of a hydrophilic thermal bond nonwoven fabric, and a hydrophilic spunbond nonwoven fabric is formed between the middle layer 2 and the lower layer 4. Characterized in that it further comprises an intermediate layer (3) made of.

The hydrophilic thermal bond nonwoven fabric constituting the upper layer is prepared by mixing 0.04 to 0.06 parts by weight of anionic surfactant with respect to 100 parts by weight of polypropylene, dissolving it with a solvent, or by applying heat or pressure or heat and pressure to melt bonding. Can be. The hydrophilic thermal bond nonwoven fabric constituting the upper layer was made of a network structure such as a low density web to help rapid fluid absorption of the high hydrophilic meltblown nonwoven fabric of the middle layer. After a certain period of time, the high hydrophilic melt blown nonwoven fabric of the middle layer has a characteristic of preventing the fluid from absorbing to the surface. The manufacture of the thermal bond nonwoven fabric described above may be understood as well known to those skilled in the art of manufacturing the nonwoven fabric and may be understood to be well known to purchase and use a commercially available thermal bond nonwoven fabric. In the present invention, during the manufacture of the thermal bond nonwoven fabric, a non-woven fabric obtained by mixing an anionic surfactant with a polypropylene resin, which is a low melting point resin, is produced as a nonwoven fabric to impart hydrophilicity to absorb non-woven fabrics such as blood or body fluids. There is this. The thermal bond nonwoven fabric may preferably have a density of 10 to 20 g / m 2, more preferably 15 g / m 2. When the thermal bond nonwoven fabric is less than 10g / ㎡, there is a problem that can not withstand the pressure and heat applied during the lamination, there is a problem that the deformation and the absorbency is lowered, on the contrary, if the thermal bond nonwoven fabric exceeds 20g / ㎡, Web (Web) Such a thick network structure may hinder the rapid flow of the fluid and may not receive it quickly when excessive fluid flow may result in a decrease in absorption rate and a high volume mass. The hydrophilic thermal bond nonwoven fabric constituting the upper layer absorbs the fluid, but has a property of retaining the fluid so that the structure of the thermal bond nonwoven fabric does not collapse even after a predetermined time due to the fluid. It is easy to transition to, the fluid absorbed by the thermal bond nonwoven fabric is almost entirely transferred to the melt blown nonwoven fabric can be a soft feeling without touching the fluid directly when touching the upper layer. The anionic surfactant is to be used to increase the absorbency of the nonwoven fabric, preferably may be harmless in contact with the human body for medical use, the anionic surfactant harmless to the human body is sodium dioctylsulfosuccinate (Sodium dioctyl Sulfosuccinate) can be understood to those skilled in the art to purchase and use commercially available from leading manufacturers at home and abroad, for example, Cytec Industries, Inc., West Peterson, NJ, USA AEROSOL OT Surfactuant, a product of CYTEC INDUSTRIES INC., May be a commercially available anionic surfactant such as FDA Approval No. 21CFR 178.3400. Hereinafter, what is used for manufacture of the nonwoven fabric which comprises a middle layer and an intermediate layer can also be the same or similar.

The high hydrophilic melt blown nonwoven fabric constituting the middle layer is made of ultra-fine fibers by spinning polypropylene synthetic polymer to make ultra-fine fibers by high pressure hot air to accelerate the flow of water (fluid) to uniformly increase the ultra-fine fibers in order to maximize the fluid absorption rate and absorption. As it is prepared by binding to a capillary structure such as a web of some form, it can be understood to those skilled in the art that it is known enough to be commercially available for use. The meltblown nonwoven fabric is a three-dimensional fiber assembly having a cobweb-like structure by interconnecting fine fibers having a diameter of 10 μm or less. A general definition is a process in which a polymer capable of forming fibers with thermoplastic is spun through a spinneret formed of hundreds of orifices, and the polymer extruded with a spinneret is sprayed at high speed on both sides of the spinneret in a molten state. It is understood as a process of forming a self-bonding nonwoven fabric having a high filter performance by laminating the ultrafine fibers super-fine by hot air, and the basic principle is spray spinning and air jet. Two types of manufacturing methods are known, which are melt blowing. The high hydrophilic meltblown nonwoven fabric constituting the middle layer is a main absorbing layer, so that the ultra-fine fibers are uniformly woven into a web capillary structure of a certain shape, so that the absorbing action is performed until the fluid spreads evenly without remaining in a certain portion. It is a function of maximizing the absorption by allowing the complete absorption state and the drying reaction in response to the daily temperature in the air. In particular, in the present invention, the diameter of the fiber was set to 0.001 to 0.003 mm during spinning of the fiber constituting the nonwoven fabric in order to increase the absorption rate with respect to the same volume when manufacturing the meltblown nonwoven fabric constituting the middle layer. This results in higher absorption for the same volume by making the fiber thinner than conventional (0.006 to 0.1 mm) rather than increasing the functional weight of the absorbent fabric and thus increasing the amount of fiber used to increase the absorption. It is characterized by one point. When the fiber is less than 0.001 mm, it is difficult to manufacture the fiber itself constituting the nonwoven fabric, it is expensive to manufacture a detention (nozzle) for spinning it, and also melt-blown nonwoven fabric obtained using such a fiber There may be a problem that the physical properties of the deterioration, on the contrary, if it exceeds 0.003mm, there may be a problem that the increase in the amount of absorption relative to the volume is not sufficient compared to the melt blown nonwoven fabric in the conventional absorbent fabric. In general, even if the volume mass is increased, there is a problem that the absorption rate of the fluid is lowered if the volume and volume of the spinning chamber constituting the meltblown nonwoven fabric are not increased to increase the volume, and the spinning chamber constituting the meltblown nonwoven fabric is thick. Absorption and movement speed of the surface fluid is lowered, there may be a problem that increases the volume mass. In particular, by making the diameter of the meltblown nonwoven fabric constituting the middle layer more fine as in the present invention, the density is reduced as much as possible, so that the fluid absorption rate and the absorption amount can be further increased. The increase in the volume mass is difficult to use because the fabric is stiff in practical use and cannot be smoothly covered on the surgical part of the streamlined human body, and the absorbent cloth is formed by directly attaching the lower layer film in the state of increasing the volume mass. In the case of manufacturing the melt blown nonwoven fabric and the film is stacked between the two layers are in close contact with the air layer is not formed to interfere with the flow and absorption of the fluid, there is a problem that the absorption rate and absorption is reduced. Therefore, in the present invention, the melt-blown nonwoven fabric constituting the middle layer is processed more finely to increase the absorption rate for the same volume, and to lower the density as much as possible, thereby increasing the fluid absorption rate and the absorption amount. The meltblown nonwoven fabric may preferably be one having a density of 80 to 100 g / m 2, more preferably 90 g / m 2. When the meltblown nonwoven fabric is less than 80 g / m 2, it may be difficult to have an optimal capillary structure capable of absorbing a large amount of fluid quickly and thus may have a problem in that absorbency is lowered. The amount of fluid absorption can be increased, but more web-structured fiber layers are formed, causing the flow of fluid to be disturbed, and the volumetric mass becoming too high, making it uncomfortable to use, and the absorbent fabric to be stiff. When placed in the vicinity of the surgical site may not be placed comfortably along the mammary gland, there is a problem that it becomes difficult to function properly as an absorbent fabric.

The hydrophilic spanbond nonwoven fabric constituting the intermediate layer may be prepared by mixing 0.03 to 0.04 parts by weight of anionic surfactant with respect to 100 parts by weight of a synthetic material made of polypropylene, and melting and spinning them together with the self-bonded melt-spun fibers. Can be. The hydrophilic spanbonded nonwoven fabric constituting the intermediate layer is combined with the high hydrophilic meltblown nonwoven fabric constituting the intermediate layer, so as to further maximize (double) the absorption rate and absorption of the multilayer meltblown nonwoven fabric. By forming an air road to accelerate the speed of the fluid, the high hydrophilic meltblown nonwoven fabric takes the fluid wider and doubles the absorption. The production of the above-described spanbond nonwoven fabric can be understood as well known to those skilled in the art of manufacturing the nonwoven fabric as well as to be able to purchase and use a commercially available spanbond nonwoven fabric. In the present invention, during the manufacture of the spunbond nonwoven fabric, anionic surfactant is mixed with the polypropylene resin, which is a low melting point resin, to prepare the nonwoven fabric, thereby imparting hydrophilicity to the nonwoven fabric. Is there. In addition, with respect to the air passage, in the conventional three-layer absorbent cloth, the fluid flows and is absorbed only at the upper surface of the layer made of the melt blown nonwoven fabric, which is the middle layer, and moves to the lower film layer. The surface of the film layer is dense and flat so that no air passage is formed so that the fluid is not absorbed immediately and remains near the film layer. Thus, the film is stagnated in the meltblown nonwoven fabric at a position adjacent to the film layer. The fluid may not be absorbed sufficiently and may fall to the bottom to contaminate the surrounding environment, and may also have a problem of increasing the possibility of contact with medical staff. However, in the present invention, the melt blown layer is formed on the lower layer and the film layer. Interposed between the nonwoven fabrics as a spunbond nonwoven fabric as a middle layer to To improve the yield and rate of absorption will have to be characterized by a point. The spanbond nonwoven fabric may preferably have a density of 13 to 15 g / ㎡, more preferably 14 g / ㎡, this range is selected by the inventors to the optimum range through repeated experiments, If it is less than 13g / ㎡, there may be a problem that the absorption amount and the absorption rate of the fluid does not become sufficiently high, on the contrary, if it exceeds 15g / ㎡, the volume mass is too high to be uncomfortable to use, the absorbent stiffness phenomenon This occurs when the streamlined body is placed around the surgical site is not placed comfortably along the mammary gland can be a problem that it is difficult to exert its function as an absorbent cloth. In addition, the spanbonded nonwoven fabric constituting the intermediate layer has an advantage that bonding occurs well when laminating with the film constituting the lower layer described below only by applying heat and pressure without using an adhesive. It is possible to manufacture the absorbent fabric even without using an adhesive that can function as a pollution source to the human body.

The film constituting the lower layer blocks fluid permeation but passes water vapor. The film may preferably be a polyethylene film. Such polyethylene film is generally sold under the name of breathable film by domestic and international leading manufacturers, and is used in the manufacture of infant diapers, women's sanitary napkins, and the like. It can be understood. Such a breathable film is a functional film having moisture permeability / waterproof function at the same time that the pores of several microns size are formed uniformly by the stretching process inside the film to allow water vapor and air to pass and not to pass the fluid. It can be. The film is located in the lower layer to block the permeation of the fluid, and has the function of blocking the unnecessary fluid already absorbed across the upper, middle and middle layers, infection of germs and contaminating fluid of dangerous substances. The film may preferably have a density of 18 to 23 g / m 2, more preferably 20 to 22 g / m 2. If the film is less than 18g / ㎡, when lamination by calendering, there may be a problem that the deformation and perforation due to heat and pressure, on the contrary, if the film exceeds 23g / ㎡, the absorbent fabric becomes stiff to be inconvenient to use There may be a problem.

By laminating the lower layer, the middle layer, the middle layer, and the lower layer as described above, it is possible to manufacture the absorbent cloth according to the present invention, and when used in the case of leakage of a large amount of blood or body fluid, such as during surgery, once hydrophilic Through the lower layer of blood or body fluid is absorbed into the lower layer, the absorbed fluid is easily transferred back to the middle layer to increase the absorption rate. At this time, in the conventional case, a film functioning as a lower layer is closely stacked on the middle layer, and the film constituting the lower layer exhibits impermeability to the fluid, so that an air passage is formed in the middle layer of the part closely adhered by the film. It is not formed, which makes it difficult to absorb the fluid in this part, and also impedes the flow of air in the absorbent fabric, thereby preventing the fluid absorbed into the lower layer from being transferred to the middle layer, thereby lowering the overall absorption rate or absorption rate. It became.

However, the absorbent fabric according to the present invention forms an air passage between the intermediate layer and the lower layer by further interposing the intermediate layer between the middle layer and the lower layer, and consequently improves the air flow in the absorbent layer to sufficiently absorb the fluid absorbed in the lower layer. And it is characterized in that it is improved in both the absorption rate and the absorption rate by allowing the transition to the middle layer quickly.

Moreover, in the manufacturing method of the medical polypropylene multilayer absorbent fabric of this invention, in order to manufacture an absorbent fabric by laminating | stacking in order of an upper layer, a middle layer, an intermediate | middle layer, and a lower layer, (1) anionic surfactant 0.04 with respect to 100 weight part of polypropylenes. To 0.06 parts by weight of the mixture, and heat or pressure or heat and pressure to melt bond to prepare a hydrophilic thermal bond nonwoven fabric; (2) mixing 0.03 to 0.04 parts of anionic surfactant with respect to 100 parts by weight of the synthesis made of polypropylene, and self-bonding the long fibers obtained by melt spinning to prepare a hydrophilic spunbond nonwoven fabric; (3) 0.04 to 0.06 parts by weight of anionic surfactant is mixed with 100 parts by weight of polypropylene, and the ultrafine fibers, which are ultrafine by hot air sprayed at high speed from both sides of the spinneret, are extruded through the spinneret. Stacking to form a self-bonding nonwoven fabric having a high filter performance to produce a high hydrophilic meltblown nonwoven fabric; (4) A first layer in which a film is laminated as a lower layer on the hydrophilic spanbonded nonwoven fabric obtained in the above (2) as an intermediate layer and bonded at a pressure of 1200 to 1300 kgf / cm 2 and a temperature of 130 to 140 ° C. by calendering. Combining step; And (5) the hydrophilic thermal bond nonwoven fabric obtained in the above (1) as the upper layer and the high hydrophilic meltblown nonwoven fabrics obtained in the above (3) as the middle layer on the laminate obtained in the first bonding step of (4). And sequentially stacking and bonding the second bonding step of bonding at a temperature of 80 to 90 ° C. at a pressure of 1100 to 1200 kgf / cm 2 by calendering.

The step of preparing the hydrophilic thermal bond nonwoven fabric of (1) consists of mixing 0.04 to 0.06 parts by weight of anionic surfactant with respect to 100 parts by weight of polypropylene and melt bonding them by applying heat or pressure or heat and pressure. The production of the thermal bond nonwoven fabric as described above is well known to those skilled in the art, and in the present invention, after mixing the anionic surfactant, which is a water-friendly material, with polypropylene which is a raw material of the nonwoven fabric, the nonwoven fabric is prepared as a nonwoven fabric. It is characterized in that the absorbency of the thermal bond nonwoven fabric obtained by The thermal bond nonwoven fabric may have a physical property as described above.

The step of preparing the hydrophilic spanbond nonwoven fabric of (2) consists of mixing 0.03 to 0.04 parts by weight of anionic surfactant with respect to 100 parts by weight of a synthetic made of polypropylene, and self-bonding the long fibers obtained by melt spinning. The production of the above-described spanbond nonwoven fabric is well known to those skilled in the art, and in the present invention, after mixing an anionic surfactant, which is a water-friendly material, with polypropylene which is a raw material of the nonwoven fabric, the nonwoven fabric is prepared as a nonwoven fabric. It is characterized in that the absorbency of the spunbond nonwoven fabric obtained by The spunbond nonwoven fabric described above may be one having physical properties as described above.

In the manufacturing step of the high hydrophilic melt blown nonwoven fabric of (3), 0.04 to 0.06 parts by weight of anionic surfactant is mixed with respect to 100 parts by weight of polypropylene, and extruded through spinneret and sprayed at high speed from both sides of the spinneret. The ultrafine fibers, which are ultrafine by hot air, are laminated to a collector to form a self-bonding nonwoven fabric having high filter performance. The meltblown nonwoven fabric may be one having physical properties as described above.

In the first bonding step of (4), the hydrophilic spanbonded nonwoven fabric obtained in (2) and the film as a lower layer are laminated as an intermediate layer, and the pressure is 1200 to 1300 kgf / cm 2 and the 130 to 140 ° C by calendering. It is made to combine at a temperature of. At this time, if the pressure is less than 1200kgf / ㎠, or if the temperature is less than 130 ℃, there may be a problem that the bonding between the layers is not sufficient, on the contrary, the pressure exceeds 1300kgf / ㎠, or the temperature is 140 If it exceeds C, there may be a problem that the web capillary structure peculiar to the nonwoven fabric is destroyed and the absorption rate is lowered.

In the second bonding step of (5), the hydrophilic thermal bond nonwoven fabric obtained in the above (1) as the upper layer and the high hydrophilic meltblown nonwoven fabrics obtained in the above (3) as the middle layer are combined in the first bonding step of (4). It consists of laminating | stacking sequentially on the obtained laminated body and bonding by the calendering process at the pressure of 1100-1200 kgf / cm <2> and the temperature of 80-90 degreeC. At this time, if the pressure is less than 1100kgf / ㎠, or if the temperature is less than 80 ℃, there may be a problem that the bonding between the layers is not enough, on the contrary, the pressure exceeds 1200kgf / ㎠, or the temperature is 90 If it exceeds C, there may be a problem that the web capillary structure peculiar to the nonwoven fabric is destroyed and the absorption rate is lowered.

In the first coupling step (3), the coupling may be performed using a pair of planar rolls having no protruding shape. It will be understood that calendaring using a pair of planar rolls can be easily performed by those skilled in the art.

In the second coupling step (4), the coupling may be performed using a flat roll having no protrusion shape and a piece roll having a protrusion shape. The engraving roll in the above may preferably be located on the upper layer side. It is to be understood that calendering using the planar rolls and engraving rolls can also be easily performed by those skilled in the art. At this time, the slice roll is a portion obtained by the slice roll to minimize the portion to be heated and pressurized in the absorbent fabric as a laminate to be pressed by the capillary web (non-woven) of the non-woven fabric is not broken, the portion of the fluid flow is not pressed To move through them. If all the combinations are pushed together by means of the top and bottom flat rolls, all capillary web network structures are destroyed and pressed and no fluid flow can be expected. Preferably, the engraving roll may be formed by embossing the circular portions attached to each other when bonding the combinations of the four layers by heat and pressure, and embossing the protrusions having a diameter of about 1 mm at an interval of about 2 mm. Thereby, the heating is pressurized by the protrusions, and by means of such heating and pressing, it is possible to minimize the joint portions of the combinations of the four layers, but those skilled in the art can arbitrarily adjust the size and spacing of the diameter of the protrusions. Is naturally understood, but the present invention is not limited thereto, and the above should be understood as illustrative only. The absorbent cloth laminated | stacked by heating and pressurizing using the engraving roll of the said specification was shown by the photograph in FIG.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Preparation Example  One

After mixing at a rate of 0.5 g of anionic surfactant per kilogram of polypropylene, it is processed into short fibers, the short fibers are formed into a web structure, and then by known calendering using a slice roll and a flat roll A hydrophilic thermal bond nonwoven fabric was prepared by melt bonding by applying a heat of 50 ° C. and a pressure of 50 dyne / cm 2. The anionic surfactant and the anionic surfactant in the following production examples include AEROSOL OT Surfactuant, a product of CYTEC INDUSTRIES INC., West Peterson, NJ; The approval number was 21 CFR 178.3400).

Preparation Example  2

At the rate of 0.5 g of anionic surfactant per 1 kg of polypropylene, the microfibers, which are micro-fine fibers are stacked on the collector by hot air sprayed at high speed from both sides of the spinneret while being extruded through the spinneret. Highly hydrophilic meltblown nonwovens were made by forming into self-bonding nonwovens having performance.

Preparation Example  3

Melting, mixing and homogenizing polypropylene chips having a melt index (MFR) of 50 g / 10 min according to known methods, spinning them through spinnerets, quenching the spun polymer with cooled air and suctioning from the bottom of the belt The rotation speed of the blower is adjusted to about 400rpm to extend the filament to form a spanbond web structure on a continuously driven conveyor belt, and mix 0.4g of anionic surfactant per kg of polypropylene filament of the spanbond web structure. I was. Thereafter, the processing heat of the rotary roll in heating calendering was adjusted to 150 ° C., and the embossed portion of the engraving roll was thermally bonded to a flat roll at a pressure of 50 dyne / cm 2 to prepare a hydrophilic spanbond nonwoven fabric.

Example

The hydrophilic thermal bond nonwoven fabric obtained in Preparation Example 1 was used as an upper layer, and the high hydrophilic meltblown nonwoven fabric obtained in Preparation Example 2 was used as a middle layer, and the hydrophilic spanbonded nonwoven fabric obtained in Preparation Example 3 was used as an intermediate layer. And laminating them in order using a known polyethylene film as a lower layer, and laminating the film as the hydrophilic spunbond nonwoven fabric and the lower layer as an intermediate layer, and 1250 kgf / by calendering using a pair of plane rolls. After bonding at a pressure of cm 2 and a temperature of 135 ° C., a hydrophilic thermal bond nonwoven fabric as a top layer and a high hydrophilic meltblown nonwoven fabric as a middle layer were sequentially stacked on the resulting laminate, and a pair of rolls consisting of a flat roll and a flake roll According to the invention by combining at a temperature of 1150kgf / ㎠ and 85 ℃ by calendering process using It was prepared in the blisters. At this time, the engraving roll was in contact with the upper layer.

Comparative example  One

As Comparative Example 1, a three-layer bond absorbent fabric which was commercially available and available for purchase as of the filing date of the present invention was used as a control.

Experimental Example  One

The absorbent fabrics (four-layer-bonded absorbent fabrics) and the absorbent fabrics of Comparative Example 1 (known commercially available three-layer-bonded absorbent fabrics) according to the present invention were each arbitrarily taken and used as samples, respectively. And measured for the absorption rate and thickness, the results are shown in Table 1 below.

The measurement of the absorption amount was made by cutting each sample into a square 100 mm in length, and then taking out each sample after 30 seconds of complete immersion in water, and measuring the weight. The weight before absorption was measured and the weight after absorption was measured. After the measurement, the weight before absorption was obtained by subtracting the weight before absorption.

The measurement of the absorption rate is to cut the test sample into a width of 30 mm and a length of 40 mm, submerge the end of the sample by 10 mm in red ink, and then measure the time taken to reach the reference point of 30 mm in length. Obtained.

As shown in Table 1, although the thickness of the Example increased only 0.18 mm on the average compared to the comparative example (an increase of 32% on average), the amount of absorbents of the same specification was 1.6g higher than that of the absorbent fabrics of the same standard. The absorption was confirmed to increase the average 36% more than the comparative example was confirmed that the apparent increase in the amount of absorption, 3.6 seconds faster on average also in the absorption rate was confirmed that the average 21% faster than the comparative example compared to the comparative example Despite the increase of the absorption rate was found to increase.

Experimental Example  2

Except for using the absorbent fabric (four-layer bond absorbent fabric) and the intermediate layer of the embodiment according to the present invention as a hydrophilic thermal bond nonwoven fabric was prepared in the same manner as in the above Example 2 in the same manner as in Experimental Example 1 The experiment was performed, and the results are shown in Table 2 below.

As shown in Table 2, in the case of Comparative Example 2, it was confirmed that the absorption rate and the amount of absorption decrease compared to the Example. This is believed to be due to the easily collapsed web network of the short-fiber hydrophilic thermal bond nonwoven fabric by heating and pressing, and weakened adhesion to the film.

The present invention can be utilized in the industry and the medical industry for manufacturing a surgical absorbent fabric.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

1 is a view schematically showing the structure of a medical polypropylene multilayer absorbent fabric according to the present invention.

Figure 2 is a photograph of the surface of the absorbent fabric laminated using a slice roll in the upper layer when manufacturing a medical polypropylene multilayer absorbent fabric according to the present invention.

Claims (8)

In the upper layer, the middle layer and the lower layer is laminated, a multi-layered absorbent fabric comprising a high hydrophilic melt blown nonwoven fabric as a middle layer and a film as a lower layer, The upper layer is made of a hydrophilic thermal bond nonwoven fabric, and further comprises an intermediate layer made of a hydrophilic spunbond nonwoven fabric between the middle layer and the lower layer, the hydrophilic spanbond nonwoven fabric constituting the intermediate layer is anionic per 100 parts by weight of polypropylene Medical polypropylene multi-layer absorbent fabric, characterized in that it is prepared by mixing the surfactant in a ratio of 0.03 to 0.04 parts by weight and self-bonding the long fibers obtained by melt spinning. The method of claim 1, Medical polypropylene multilayer, characterized in that the hydrophilic thermal bond nonwoven fabric constituting the upper layer is prepared by mixing 0.04 to 0.06 parts by weight of anionic surfactant per 100 parts by weight of polypropylene and melt bonding by applying heat or pressure or heat and pressure Absorbent cloth. The method of claim 1, The high hydrophilic meltblown nonwoven fabric constituting the middle layer is mixed with 0.04 to 0.06 parts by weight of anionic surfactant based on 100 parts by weight of polypropylene, and is extruded through spinneret while being heated at high speed from both sides of the spinneret. A medical polypropylene multilayer absorbent fabric characterized in that the ultrafine fibers are laminated to a collector and formed of a self-bonding nonwoven fabric having a high filter performance. delete The method of claim 1, Medical polypropylene multilayer absorbent fabric, characterized in that the diameter of the fiber constituting the melt-blown nonwoven fabric constituting the middle layer is within the range of 0.001 to 0.003mm. In manufacturing the absorbent fabric by laminating in the order of the upper layer, the middle layer, the middle layer and the lower layer, (1) mixing an anionic surfactant at a ratio of 0.04 to 0.06 parts by weight per 100 parts by weight of polypropylene, and melt-bonding it by applying heat or pressure or heat and pressure to prepare a hydrophilic thermal bond nonwoven fabric; (2) mixing an anionic surfactant at a ratio of 0.03 to 0.04 parts by weight per 100 parts by weight of polypropylene, and self-bonding the long fibers obtained by melt spinning to prepare a hydrophilic spunbond nonwoven fabric; (3) 0.04 to 0.06 parts by weight of anionic surfactant is mixed with 100 parts by weight of polypropylene, and the ultrafine fibers, which are ultrafine by hot air sprayed at high speed from both sides of the spinneret, are extruded through the spinneret. Stacking to form a self-bonding nonwoven fabric having a high filter performance to produce a high hydrophilic meltblown nonwoven fabric; (4) A first layer in which a film is laminated as a lower layer on the hydrophilic spanbonded nonwoven fabric obtained in the above (2) as an intermediate layer and bonded at a pressure of 1200 to 1300 kgf / cm 2 and a temperature of 130 to 140 ° C. by calendering. Combining step; And (5) The hydrophilic thermal bond nonwoven fabric obtained in the above (1) as the upper layer and the high hydrophilic meltblown nonwoven fabrics obtained in the above (3) as the middle layer were sequentially formed on the laminate obtained in the first bonding step of (4). Laminating to a second bonding step of bonding at a temperature of 80 to 90 ° C. with a pressure of 1100 to 1200 kgf / cm 2 by calendering; Method for producing a medical polypropylene multi-layer absorbent fabric comprising a. The method of claim 6, Method for producing a medical polypropylene multi-layer absorbent fabric, characterized in that the first bonding step of (4) is bonded using a pair of flat rolls having no protruding shape. The method of claim 6, The second bonding step of (5) is a method for producing a medical polypropylene multilayer absorbent fabric, characterized in that the bonding is made using a flat roll having no protrusion shape and the protruding shape rolls.

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