KR20220098462A - Cleaning method using radiation (gamma line) - Google Patents

Abstract

The present invention relates to a cleaning method of laundry from medical institutions by using a gamma ray. The cleaning method of laundry from medical institutions by using a gamma ray comprises the following steps of: packing cleaned laundry; and radiating a surface of the packed laundry with a gamma ray at 10 to 15 kGy of a radiation amount for 12 to 15 hours, wherein a radiation source of the gamma ray is cobalt-60(Co-60) and the laundry is packed by using any one package selected from polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and polycarbonate (PC). Accordingly, use of a gamma ray can give excellent effects of removing toxic bacteria and contaminants.

Description

Cleaning method using radiation (gamma line)

The present invention relates to a washing method of medical institution laundry using gamma rays.

More particularly, it relates to a washing method of laundry in a medical institution using gamma rays, which can excellently sterilize harmful bacteria and contaminants of laundry discharged from medical institutions using gamma rays.

In general, medical institution laundry means laundry that can be reused after a washing process as used by medical institution workers and patients who are the subject of treatment in specialized medical institutions such as hospitals.

The laundry includes bedding such as blankets, blankets, sheets, pillows and pillowcases, patient clothes, newborn clothes, surgical clothes and gowns, surgical cloths, machine cloths, masks, hats, towels, linens such as diapers, and There are other laundry such as curtains, canopies and collection bags. The laundry can also be divided into contaminated laundry and non-contaminated laundry. Contaminated laundry includes laundry used by an infectious disease patient according to the Infectious Disease Prevention Act, laundry that is likely to be contaminated with infectious pathogens, and contaminated with patient blood, pus, excrement and secretions. It refers to laundry, laundry contaminated with excrement or secretions from animals infected with infectious diseases, and laundry contaminated with infectious pathogens.

In general, in the laundry method for medical institutions, contaminated laundry is classified according to the degree of contamination, disinfectant and detergent are added to hot water to sterilize for 10 to 20 minutes, and the laundry is soaked for 10 to 20 minutes, dehydration and Perform the first preliminary washing by rinsing 3 times or more, add disinfectant and wash for 10 to 20 minutes, spin-dry and rinse 3 times or more to perform the secondary main washing, and add a neutralizing agent and fabric softener After drying and rinsing twice or more, dry with forced hot air, iron the laundry, sort and package before delivery.

For non-contaminated laundry, add disinfectant and surfactant to hot water to sterilize for 10 to 20 minutes, then dehydrate and rinse.

Carry out the first wash three times or more, add a disinfectant and wash for 10 to 20 minutes, perform dehydration and rinsing three times or more, perform the second main laundry, and add a neutralizing agent and fabric softener to perform dehydration and dehydration. After rinsing twice or more, dry with forced hot air, iron the laundry, sort and package before delivery.

In order to sterilize and sterilize the laundry of medical institutions because it contains a large amount of pathogens and harmful bacteria, the disinfectant and detergent used for washing the laundry contain a large amount of components harmful to the human body. As such, when a synthetic detergent containing ingredients harmful to the human body is used, it affects the health of the wearer and causes environmental pollution due to the discharge of a large amount of wastewater. In addition, pathogens with strong resistance, super bacteria with resistance to antibiotics, etc. are hardly sterilized by the above-mentioned washing method, so medical institution workers and patients are exposed to secondary and tertiary infections of these pathogens and harmful bacteria, There is an urgent need for 100% sterilized laundry for medical institutions. However, there is no institution that supervises the laundry condition of the medical institution laundry, which is highly susceptible to contamination, transmission, and infection, and even the actual condition of the laundry condition is not grasped.

On the other hand, gamma ray is an electromagnetic wave having a shorter wavelength than x-ray and is a form of electromagnetic radiation having high energy generated by nuclear transition. The gamma rays have low ionizing and photosensitizing effects, but have excellent penetrating power, and a method of using such gamma rays to transfer the energy of gamma rays to a specific part of an object to kill all microorganisms remaining in the object to a sterile level is known. have. In addition, gamma irradiation can destroy harmful microorganisms without raising the temperature of the equipment being performed, and there is no concern of secondary contamination or pollution caused by residual poisonous substances in laundry, which is advantageous in terms of reliability.

The present inventors use the above-described gamma irradiation in the washing process of contaminated and non-contaminated laundry to reduce the emission of environmental pollutants in a large amount compared to the conventional washing method, and to provide a laundry method for medical institution laundry, which has a very excellent effect of removing harmful bacteria and pollutants. completed.

It is an object of the present invention to provide a method of washing laundry in a medical institution using gamma rays that have excellent removal effect of harmful bacteria and contaminants and do not leave toxic substances.

Another object of the present invention is to provide a washing method for medical institution laundry that can be sterilized while the laundry is packaged.

Another object of the present invention is to provide a washing method for medical institution laundry using gamma rays that can significantly reduce the emission of environmental pollutants.

One aspect of the present invention relates to a washing method of medical institution laundry using gamma rays. The washing method includes packaging the washed laundry; Then, gamma rays are applied to the surface of the packaged laundry at an irradiation dose of 10 to 15 kGy for 12 to 15 hours.

not investigated; Including the step, the radiation source of the gamma rays is cobalt-60 (Co-60), the packaging is polyethylene (Polyethylene, PE), polyvinyl chloride (Polyvinyl chloride, PVC), polyvinylidene chloride (Polyvinylidenechloride, PVDC), and polycarbonate (PC), characterized in that the laundry is packaged using any one packaging material selected from the group consisting of polycarbonate (PC).

When the washing method of medical institution laundry using gamma rays according to the present invention is used, the removal effect of harmful bacteria and contaminants from the laundry is excellent, toxic substances do not remain, sterilization is possible while the laundry is packaged, and By significantly reducing emissions, environmental pollution can be prevented.

In the description of the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

And the terms described below are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user or operator, so the definition should be made based on the content throughout this specification describing the present invention.

One aspect of the present invention relates to a washing method of medical institution laundry using gamma rays. The washing method includes packaging the washed laundry; And irradiating gamma rays to the surface of the packaged laundry at an irradiation dose of 10 to 20 kGy; may include a step.

In one embodiment, the washing method of medical institution laundry using gamma rays (a) washing step; (b) drying step; (c) packaging step; and (d) gamma-ray irradiation step.

Hereinafter, a washing method of medical institution laundry using gamma rays according to the present invention will be described in detail.

(a) washing step

The step is a step performed by adding a detergent to the laundry immersed in boiling water. In one embodiment, the laundry may be immersed in boiling water for 10 to 20 minutes and then soaked, and then washed for 10 to 20 minutes by adding detergent. Contaminants of the laundry can be excellently removed under the above conditions.

A conventional detergent may be used. For example, surfactants (Surface Active Agent, Surfactant) that act on the interface between water and the surface of an object to remove dirt from the surface, phosphate, sodium carbonate, and Builders that increase the activity of detergents It may be used a synthetic detergent containing, but is not limited thereto.

In an embodiment, 001 to 5 parts by weight of the detergent may be added based on 100 parts by weight of the laundry immersed in the boiling water. In the above range, the effect of removing impurities such as contaminants may be excellent.

In addition, the present invention may further perform rinsing and dehydrating steps for the washed laundry after the washing step. In an embodiment, each of the rinsing and dehydration may be repeated two or more times. When the rinsing and dehydration steps are performed as described above, the workability of the present invention can be improved.

In the rinsing step, excess detergent and impurities remaining in the washing step may be removed by rinsing the laundry for 5 to 15 minutes. In this case, a fabric softener may be further added to the laundry. A conventional fabric softener may be used. For example, fibers comprising a quaternary ammonium salt as a cationic surfactant and a nonionic surfactant as a stabilizer

A softening agent may be used, but is not particularly limited thereto. In an embodiment, the fabric softener may be added in an amount of 001 to 2 parts by weight based on 100 parts by weight of the laundry immersed in the boiling water. In the above range, the fibers of the laundry are used to soften the touch, and by neutralizing the fibers that are anions, static electricity is prevented, and the color change of the laundry can be prevented and the detergent residues are not left behind.

The dehydration step may remove moisture from the washed laundry for 5 to 10 minutes.

(b) drying step

The step is a step of drying the washed laundry. The drying may be performed by drying in a conventional room. For example, hot air drying for 20 to 35 minutes using a hot air of 40 ~ 55 ℃ may be used, but is not limited thereto.

In addition, the dried laundry may further include ironing the dried laundry for ease of handling. When ironing, it is possible to straighten wrinkles generated during washing and improve smoothness.

(c) packaging step

The step is a step of packaging the washed laundry. In one embodiment, the packaging is polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polyvinyl chloride (PVC), polyvinylidene chloride (Polyvinylidenechloride, PVDC), polyethylene terphthalate (Polyethylene terphthalate, PET) ), polycarbonate

The laundry may be packaged using a packaging material of any one material selected from polycarbonate (PC) and nylon (Nylon). When the packaging material selected from the above is used, the sterilization effect of harmful bacteria may be excellent while preventing damage to the laundry inside.

The washed laundry may be sealed and packaged using the packaging material of the above material, but is not limited thereto. By using the packaging material of the above material, it is possible to minimize damage to the laundry when irradiated with gamma rays.

(d) gamma ray irradiation step

The step is a step of irradiating the packaged laundry with gamma rays. In one embodiment, the packaged laundry may be irradiated with gamma rays at an irradiation dose of 10 to 20 kGy for 12 to 20 hours.

The gamma rays have very strong penetrating power to the material, so that it may be possible to sufficiently sterilize harmful bacteria such as pathogens that may exist in the laundry inside the sealed packaging. Due to the characteristics of electron beams, the absorbed dose increases slightly inside the surface than the surface, so the dose change rate inside the product may be different, but gamma rays have little difference in the absorbed dose. In addition, there is no need to align the laundry, the packaging type is irrelevant, and there is no need to turn the laundry upside down for even inspection of the laundry.

When the gamma rays are irradiated with an irradiation dose of less than 10 kGy, some microorganisms survive and the complete sterilization effect may not appear. may be lowered.

In one embodiment, the radiation source of gamma rays may be one selected from cobalt-60 (Co-60) and cesium-137 (Se-137). When the laundry is irradiated with gamma rays using the radiation source, there is almost no temperature rise and the change in the amount of radiation is very uniformly irradiated so that the object of the present invention can be easily achieved.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, the following examples are provided to help the understanding of the present invention, and the scope of the present invention is not limited to the following examples. Content not described here will be omitted because it can be technically inferred sufficiently by those skilled in the art.

Example 1

One set of patient clothes exposed to E. coli and Staphylococcus aureus environments was prepared. The patient clothes were immersed in boiling water for 10 minutes, and then 02 parts by weight of a synthetic detergent was added to 100 parts by weight of the patient clothes put into the boiling water and washed for 10 minutes. Then, 01 parts by weight of fabric softener was added to 100 parts by weight of the patient clothes added to the boiling water,

The steps of rinsing for 15 minutes and then dehydrating for 10 minutes were repeated 3 times each. The dehydrated patient clothes were dried for 25 minutes using hot air at 50° C., and then the dried patient clothes were ironed and sealed with a polyethylene packaging material.

The sealed-packed patient clothes were placed in a standard box (pellet: width 58 cm, length 36 cm, height 43 cm), and the surface on which the patient clothes were sealed-packed was irradiated with gamma rays using a gamma ray irradiation facility of Greenpia Technology Co., Ltd. Cobalt-60 was used as the radiation source of the gamma rays, and the packaged patient clothes were irradiated for 15 hours at a radiation dose of 15 kGy.

Claims (1)

packaging the laundry; and
irradiating gamma rays to the surface of the packaged laundry at an irradiation dose of 10 to 15 kGy for 12 to 15 hours; comprising the step, wherein the radiation source of gamma rays is cobalt-60 (Co-60),
The packaging is polyethylene (Polyethylene, PE), polyvinyl chloride (PVC), polyvinylidene chloride (Polyvinylidene chloride, PVDC), and polycarbonate (Polycarbonate, PC) using any one packaging material selected from the laundry A washing method of medical institution laundry using gamma rays, characterized in that packaging.