KR102354635B1 - Antibacterial film using copper alloy and antibacterial handle with antibacterial film - Google Patents

Abstract

An antibacterial film using copper alloy of the present invention comprises a copper alloy plate composed of zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), and the remaining of copper and inevitable impurities. In addition, an antibacterial handle having the antibacterial film using copper alloy according to the present invention comprises: the copper alloy plate made of zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), and the remaining of copper and inevitable impurities, wherein a surface is embossing-processed and an adhesive is applied to a back side; and a gripping unit on which the copper alloy plate is attached by the adhesive and which can be gripped by a user. By using the antibacterial handle for an ambulance, a risk of cross infection by contact bewteen a paramedic and a patient is reduced.

Description

Antibacterial film using copper alloy and antibacterial handle with antibacterial film

The present invention relates to an antibacterial film using a copper alloy and an antibacterial handle provided with the antibacterial film.

The main purpose of emergency vehicles, including ambulances, is to transport various types of patients, including confirmed and suspected patients, and patients with weakened immunity.

According to the Statistical Yearbook of Emergency Activities of the Fire Department, the annual number of dispatches is 2.93 million, and the number of transferred patients is 1.86 million. The age group of the transferred patients is 17% in their 50s the most, 16.4% in their 70s, 15.5% in their 60s, 12.1% in their 80s, and 11.6% in their 40s. In particular, the proportion of potential emergency patients among the ambulance users is 40.8%, and the proportion of semi-emergency patients is 27.4%, which is a high proportion of emergency patients. Therefore, the number of people using the ambulance varies from critically ill patients to immunocompromised patients over 50.

In the process of transporting through an ambulance, blood, vomit, secretions, etc. of a trauma patient get stuck on the inside surface of the ambulance and the ambulance equipment. In addition, a large amount of highly pathogenic microorganisms such as a large amount of viruses are present on the hands of people with respiratory diseases, and the surfaces of the ambulance and equipment are exposed to highly pathogenic microorganisms by contact with the patient.

In particular, among the samples collected from the ambulance, the driver's seat handle showed a pathogen detection rate of 73.1% (19/26), showing the highest detection rate among various sites, and methicillin-resistant Staphylococcus aureus (MRSA) was detected.

In other words, the inside of the ambulance is a space with a high risk of cross-infection because it is contaminated with tuberculosis, hepatitis A, and multi-resistant bacteria (MRSA, VRE, etc.) according to the transportation of various patients. In fact, pathogens mainly detected in ambulances are influenza virus, norovirus, hepatitis B virus, SARS-associated coronavirus, Candida sp., Clostridium difficile, Pseudomonas aeruginosa ), Acinetobacter baumanii, Methicillin resistant Staphylococcus aureus, and Vancomycin resistant Cocci (VRE). Most pathogens are capable of surviving from 24 hours to several days or weeks on the surface, and most are transmitted by contact.

Accordingly, paramedics and transferred patients who are mainly active inside the ambulance are highly likely to be infected with pathogens existing inside the vehicle, and there is a problem in that cases of infection continue to occur.

That is, a means to quickly kill pathogens existing inside the ambulance was required.

To this end, an antibacterial film containing copper has been developed, but since the content of copper is insufficient and the antibacterial ability is low, there is a problem in that it is difficult to kill the pathogens present in the ambulance described above, and a means having the sterilizing power of the pathogen is required. is becoming

Republic of Korea Patent Registration 10-1207843 Republic of Korea Patent Publication 10-2003-0079762 Republic of Korea Patent Publication 10-2020-0068727 Republic of Korea Patent Publication 10-2005-0037093

An object of the present invention, which was devised to solve the above problems, is to manufacture a copper alloy plate made of organic copper and phosphor bronze having excellent antibacterial properties, and attach the manufactured copper alloy plate to the inside of the ambulance and emergency equipment, so that the ambulance interior and first aid equipment This is to provide an antibacterial handle equipped with an antibacterial film and an antibacterial film using a copper alloy that can reduce and prevent the risk of cross-infection due to contact between paramedics and transfer patients by sterilizing the rice source existing in the

According to the antibacterial film using the copper alloy of the present invention for achieving the above object, zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), the balance of copper and Includes; copper alloy plate made of unavoidable impurities.

In addition, the adhesive applied to the back surface of the copper alloy plate; and a thin film member provided to be detachably attached to the adhesive, wherein a protrusion is formed on the surface of the copper alloy plate by embossing.

In addition, the copper alloy plate, zinc (Zn) 5 to 15% by weight, tin (Sn) 0.1 to 1.0% by weight, nickel (Ni) 5 to 10% by weight, iron (Fe) 1.0 to 3.0% by weight, the balance of First copper alloy material consisting of copper and unavoidable impurities, zinc (Zn) 0.1 to 0.5 wt%, tin (Sn) 3 to 10 wt%, phosphorus (P) 0.01 to 0.3 wt%, the balance of copper and unavoidable impurities It is characterized in that the formed second copper alloy material is formed to have a thickness of 1 to 3 mm by a rolling process.

Another antibacterial handle equipped with an antibacterial film using a copper alloy according to the present invention, zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), the balance of copper and unavoidable impurities a copper alloy plate manufactured with, embossed on the surface, and coated with an adhesive on the back surface; The copper alloy plate is attached by the adhesive, and the user can grip the grip portion; includes.

In addition, the copper alloy plate, zinc (Zn) 5 to 15% by weight, tin (Sn) 0.1 to 1.0% by weight, nickel (Ni) 5 to 10% by weight, iron (Fe) 1.0 to 3.0% by weight, the balance of First copper alloy material consisting of copper and unavoidable impurities, zinc (Zn) 0.1 to 0.5 wt%, tin (Sn) 3 to 10 wt%, phosphorus (P) 0.01 to 0.3 wt%, the balance of copper and unavoidable impurities It is characterized in that the formed second copper alloy material is formed to have a thickness of 1 to 3 mm by a rolling process.

As described above, the effect of the present invention as described above is to manufacture a copper alloy plate made of organic copper and phosphor bronze having excellent antibacterial properties, and attach the manufactured copper alloy plate to the inside of the ambulance and emergency equipment, thereby sterilizing pathogens present in the interior of the ambulance and emergency equipment. It is possible to provide an antibacterial handle equipped with an antibacterial film and an antibacterial film using a copper alloy that can reduce and prevent the risk of cross-infection due to contact between the paramedic and the transferred patient.

1 is a photograph showing a state in which a thin film member is attached to the back surface of an antibacterial film using a copper alloy according to a preferred embodiment of the present invention.
2 is a photograph showing a state in which the thin film member of the antibacterial film using a copper alloy according to a preferred embodiment of the present invention is removed.
3 is a photograph showing the surface of an antibacterial film using a copper alloy according to a preferred embodiment of the present invention.
Figure 4 is a surface enlarged photograph showing the projections formed by the embossing process of the antibacterial film using a copper alloy according to a preferred embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining an antibacterial film using a copper alloy according to embodiments of the present invention.

1 is a photograph showing a state in which a thin film member is attached to the back surface of an antibacterial film using a copper alloy according to a preferred embodiment of the present invention. 2 is a photograph showing a state in which the thin film member of the antibacterial film using a copper alloy according to a preferred embodiment of the present invention is removed. 3 is a photograph showing the surface of an antibacterial film using a copper alloy according to a preferred embodiment of the present invention. Figure 4 is a surface enlarged photograph showing the projections formed by the embossing process of the antibacterial film using a copper alloy according to a preferred embodiment of the present invention.

1 to 4 , the antibacterial film using a copper alloy according to the present invention includes a copper alloy plate, an adhesive, and a thin film member.

First, the copper alloy plate is made of zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), the balance of copper and unavoidable impurities.

The adhesive is applied to the back surface of the copper alloy plate. The adhesive is for attaching the copper alloy plate to the grip portion gripped by the user.

The thin film member is provided to be detachably attached to the adhesive.

That is, the antibacterial film using the copper alloy is attached to the gripper after the thin film member is removed.

Here, on the surface of the copper alloy plate, dome-shaped projections or grid-patterned projections are formed by embossing. These protrusions can be firmly gripped by the user to prevent slipping when gripped.

The antibacterial film using such a copper alloy is wound on a roller, and can be used by unwinding if necessary.

On the other hand, the copper alloy plate, the first copper alloy material and the second copper alloy material is manufactured by a rolling process.

The first copper alloy material is zinc (Zn) 5 to 15 wt%, tin (Sn) 0.1 to 1.0 wt%, nickel (Ni) 5 to 10 wt%, iron (Fe) 1.0 to 3.0 wt%, the balance of copper and It consists of unavoidable impurities.

The second copper alloy material consists of 0.1 to 0.5% by weight of zinc (Zn), 3 to 10% by weight of tin (Sn), 0.01 to 0.3% by weight of phosphorus (P), the balance of copper and unavoidable impurities.

Such a copper alloy plate is formed to have a thickness of 1 to 3 mm by a rolling process of two types of copper alloy materials.

Here, each of the first copper alloy material and the second copper alloy material prepares a molten metal in the above-described composition ratio.

The dissolution temperature is 1200 to 1350°C. At this time, phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn), etc. may be added as deoxidizers to secure sound ingots such as bubble prevention. and the total amount is added in an amount of 1.5 wt% or less. Cast ingots with molten metal.

And the obtained ingot is hot worked in a temperature range of 700 ~ 900 ℃. Hot working is difficult at temperatures lower than 700°C and may cause cracks, and at temperatures higher than 900°C, the melting point is close to the melting point and the ingot may be melted. The hot working treatment time can be determined by a person skilled in the art according to the type of hot working, for example, in the range of 1 second to 1 hour.

In addition, the obtained workpiece is cold-worked at room temperature with a degree of processing in the range of 10 to 95%. Thereafter, the obtained workpiece is heat treated by annealing in a temperature range of 300 to 900°C. In an antioxidant atmosphere, annealing heat treatment may be performed for 30 minutes to 15 hours, or annealing heat treatment while continuously passing the plate material for 20 seconds to 180 seconds. The cold working and annealing heat treatment steps may be repeatedly performed as needed.

After the annealing heat treatment, a stress relief treatment may be optionally additionally performed.

The method for manufacturing a copper alloy material is a known technique, and since it can be variously changed and implemented by those skilled in the art, the method for manufacturing a copper alloy material of the present invention is not limited to the above-described manufacturing method.

The first copper alloy material will be further described.

Zinc (Zn) serves to complement strength, elasticity and corrosion resistance.

Zinc is an element that increases strength and corrosion resistance, changes color to yellow, and reduces copper content to lower cost. If it is included, it will have an overly bright white color. In addition, if more than 15.0% by weight is included, the strength is excessively increased to reduce the degree of cold work.

Nickel can improve strength and color, and is an element that improves corrosion resistance.

Such, nickel has a disadvantage of causing discoloration in a humid atmosphere when it is contained in less than 5.0 wt%, and when it is contained in more than 10.0 wt%, the color of the finally obtained alloy changes to an excessively bright white, and it is disadvantageous to increase the raw material cost.

In addition, if nickel is less than 5.0% by weight, the desired mechanical strength is not obtained because the amount of precipitation is small, and if it exceeds 10.0% by weight, precipitates that do not contribute to strength during casting or hot rolling are generated, and at the same time, many hot-rolling cracks are generated. occurs

Tin (Sn) serves to improve corrosion resistance and wear resistance together with nickel (Ni). At this time, when tin is included in less than 0.1 wt%, there is a disadvantage in that abrasion resistance and discoloration resistance are lowered. ) does not occur. The reason that the amount of tin in the first copper alloy material is 1.0 wt% or less is to improve hot workability by adding zinc (Zn) and nickel (Ni).

Here, the strength and antibacterial properties can be excellent through tin, but since the hot workability is very poor due to the high tin content, the first copper alloy material described above reduces the amount of tin, and the zinc (Zn) and nickel ( By adding Ni), the hot workability is excellent, and the cold workability is also excellent at about 95% level, and the excellent antibacterial property of the copper alloy material is maintained as it is, and the characteristics of corrosion resistance and discoloration resistance are also excellent.

Iron (Fe) is an alloying element that improves strength and corrosion resistance together with nickel (Ni). When it is contained in an amount less than 1.0 wt %, it has no effect on improving corrosion resistance, and when it is contained in an amount greater than 3.0 wt %, molten metal fluidity due to high oxidation properties. It can cause degradation and bubbles in the ingot.

The organic copper cuprous alloy material is manufactured in the form of a sheet having a thickness of 0.5 to 1.5 mm by the above-described manufacturing method.

The second copper alloy material will be further described.

The second copper alloy material is an alloy in which a small amount of P is added to copper (Cu)-tin (Sn)-based bronze, and may be referred to as phosphor bronze.

At this time, the second copper alloy material of the present invention is an alloy in which bronze of 10 wt% or less of tin is deoxidized to phosphorus and a small amount of phosphorus is left, and is mainly composed of a content used for forging.

By the above-described manufacturing method, the second copper alloy material of phosphor bronze is manufactured in the form of a sheet having a thickness of 0.5 to 1.5 mm.

As described above, after the first copper alloy material and the second copper alloy material are processed into a sheet form through the rolling process, the first copper alloy material and the second copper alloy material in the sheet form are rolled so that they overlap again in the rolling process. is manufactured

Here, the copper alloy plate is formed by rolling a first copper alloy material and a second copper alloy material to be integrated, and one side is made of a first copper alloy material and the other side is made of a second copper alloy material.

At this time, the adhesive is applied to the first copper alloy material, and the second copper alloy material having stronger strength and antibacterial properties is exposed to the outside of the gripper.

In addition, since the second copper alloy material is exposed to the outside and peels off as it is gripped a plurality of times, when the first copper alloy material and the second copper alloy material are rolled, an antibacterial sheet may be added to the rolling.

The antibacterial sheet is a sheet woven with a spun yarn by blending a copper alloy fiber yarn with several polyester-based multifilament fiber yarns. By using the copper alloy fiber yarn, not only the antibacterial properties are excellent, but also the first copper alloy material and the second copper alloy material can be rolled more closely in the rolling process to be integrated, and the phenomenon of peeling of the second copper alloy material can be reduced.

Meanwhile, the unavoidable impurities in the present invention include one or more elements selectively from the group consisting of silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), and manganese (Mn). can do. The unavoidable impurity is a component that is naturally added through the manufacturing process of a copper alloy material such as melt casting, and the total content of unavoidable impurities is controlled to less than 0.2% by weight. A person skilled in the art can control the total content of the impurities by referring to the setting of the upper limit of the total content.

Hereinafter, an antibacterial handle equipped with an antibacterial film using the above-described copper alloy will be described.

The antibacterial handle provided with the antibacterial film using a copper alloy includes a copper alloy plate and a gripper.

The copper alloy plate is made of zinc (Zn), tin (Sn), nickel (Ni), iron (Fe), phosphorus (P), the remainder of copper and unavoidable impurities, embossed on the surface, and adhesive on the back is applied

In addition, since the copper alloy plate overlaps with the above description, a detailed description thereof will be omitted.

The grip part is attached to a copper alloy plate by an adhesive, and can be gripped by a user.

At this time, the adhesive is applied to the first copper alloy material, and the second copper alloy material is exposed to the gripper, so that the user grips the second copper alloy material.

The grip part includes a handle provided on equipment inside a vehicle, such as an ambulance, or a surface that a user can touch or touch.

In addition, since the copper alloy plate has strength, it is necessary to bend the copper alloy plate to attach it to the gripping part.

In addition, a fabric material such as natural leather or cloth may be attached to the back surface of the copper alloy plate, and natural leather or fabric may be attached to the grip portion.

On the other hand, the antibacterial handle further includes a spacer, a heating wire and a power supply.

The spacer may be formed of 1:1 copper and iron, but is not limited thereto.

In addition, the spacer made of copper and iron has a thickness of 0.5 to 1 mm and is formed in a certain width by a rolling process. Here, the predetermined width is formed to be 3 to 5 cm.

In this case, the spacers may be formed in a grid pattern to form a through hole and be bent.

The spacer is adhesively attached to the gripper. And when attaching the spacers, spaced apart so that a gap is formed between each spacer is attached.

In addition, a fabric material such as natural leather or cloth may be further added between the spacer and the grip part.

The heating wire is inserted into the gap and attached. In addition, the heating wire may be made of a plurality, and one end of the thermal acid is attached to one side of the gripping part.

The power supply unit is connected to one end of the heating wire and supplies the stored power to the heating wire.

Accordingly, the grip portion to be gripped by the user is kept warm, and it is easy to grip.

[Test Example]

A test was conducted to compare the antibacterial activity of pure copper and a number of copper alloys.

E. coli: Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538p were used as test strains.

Organic copper is the above-mentioned first copper alloy material, and phosphor bronze is the above-mentioned second copper alloy material.

Test Items Test result Initial number of bacteria 30 minutes later
(CFU/mL) Bacterial reduction rate
(%) 1 hour later
(CFU/mL) Bacterial reduction rate
(%) 2 hours later
(CFU/mL) Bacterial reduction rate
(%) pure copper coli 1.1 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 phosphor bronze coli 1.1 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 cupronickel coli 1.1 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 organic copper coli 1.1 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 brass coli 1.1 × 10 ⁶ < 10 99.999 < 1 99.9999 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ 7.5 × 10 ⁴ 93.7 6.0 × 10 ⁴ 95.0 < 1 99.9999 Nordic Gold coli 1.1 × 10 ⁶ 1.2 × 10 ⁵ 91.4 3.0 × 10 ⁴ 98.1 < 1 99.9999 Staphylococcus aureus 1.0 × 10 ⁶ 2.7 × 10 ⁵ 77.5 2.3 × 10 ⁵ 80.8 1.7 × 10 ⁵ 86.9 stainless coli 1.1 × 10 ⁶ 5.7 × 10 ⁵ 59.2 5.2 × 10 ⁵ 67.5 4.5 × 10 ⁵ 71.8 Staphylococcus aureus 1.0 × 10 ⁶ 2.5 × 10 ⁵ 79.1 2.1 × 10 ⁵ 82.5 9.0 × 10 ⁴ 93.0

As shown in [Table 1], the antibacterial performance (sterilization ability) of pure copper, phosphor bronze cupronickel, and organic copper alloy was 10 cfu/ml or less (99.999%) after 30 minutes when exposed at an ^{initial inoculation amount of 1.0 X10 6 cell/ml.} It can be confirmed that it has an antibacterial activity of 99.9999%, which kills all bacteria after 2 hours.

In addition, pure copper, phosphor bronze, cupronickel, and organic copper alloy have superior antibacterial activity compared to other copper alloys, and the sterilization range includes all of general bacteria, fungi and viruses.

Here, since pure copper has a characteristic metallic odor, it is preferable to use a copper alloy rather than pure copper in an ambulance and emergency equipment on which a patient rides.

In addition, cupronickel is an alloy of copper and nickel, and is included in the copper alloy plate of this invention.

Therefore, since phosphor bronze and organic copper alloy have excellent antibacterial activity, the antibacterial film using the copper alloy of the present invention using the same can provide excellent antibacterial ability, so the present invention can be applied to the vehicle handle, equipment handle, By attaching it to the surface of the equipment, it is possible to reduce or prevent the risk of cross-infection caused by contact between paramedics and transferred patients.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted In addition, the operation sequence of the components described in the above process does not necessarily have to be performed in a time-series order, and if the gist of the present invention is satisfied even if the execution order of each configuration and step is changed, such a process may fall within the scope of the present invention. Of course you can.

Claims (5)

Including; a copper alloy plate integrated to have a thickness of 1 to 3 mm through a rolling process by overlapping a sheet-shaped first copper alloy material having a thickness of 0.5 to 1.5 mm and a sheet-shaped second copper alloy material having a thickness of 0.5 to 1.5 mm do,
A first copper alloy material is disposed on one side of the copper alloy plate, and a second copper alloy material is disposed on the other side,
The first copper alloy material is zinc (Zn) 5 to 15% by weight, tin (Sn) 0.1 to 1.0% by weight, nickel (Ni) 5 to 10% by weight, iron (Fe) 1.0 to 3.0% by weight, the balance copper ( Cu) and unavoidable impurities,
The second copper alloy material is an antibacterial film using a copper alloy consisting of 0.1 to 0.5% by weight of zinc (Zn), 3 to 10% by weight of tin (Sn), 0.01 to 0.3% by weight of phosphorus (P), the balance of copper and unavoidable impurities. .
According to claim 1,
an adhesive applied to the first copper alloy material in the copper alloy plate; and
It further includes; a thin film member provided to be detachably attached to the adhesive,
In the copper alloy plate, the surface of the second copper alloy material, an antibacterial film using a copper alloy, characterized in that the projection is formed by embossing.
delete a user gripping part; and
Including; a copper alloy plate integrated to have a thickness of 1 to 3 mm through a rolling process by overlapping a sheet-shaped first copper alloy material having a thickness of 0.5 to 1.5 mm and a sheet-shaped second copper alloy material having a thickness of 0.5 to 1.5 mm do,
A first copper alloy material is disposed on one side of the copper alloy plate, and a second copper alloy material is disposed on the other side,
The first copper alloy material is zinc (Zn) 5 to 15% by weight, tin (Sn) 0.1 to 1.0% by weight, nickel (Ni) 5 to 10% by weight, iron (Fe) 1.0 to 3.0% by weight, the balance copper ( Cu) and unavoidable impurities,
The second copper alloy material is composed of 0.1 to 0.5% by weight of zinc (Zn), 3 to 10% by weight of tin (Sn), 0.01 to 0.3% by weight of phosphorus (P), the balance of copper and unavoidable impurities,
The first copper alloy material is an antibacterial handle provided with an antibacterial film using a copper alloy attached to the grip portion by an adhesive. delete

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