KR20100121725A - Mask for clean room - Google Patents

Abstract

PURPOSE: A mask for clean room is provided, which prevents foreign material like saliva from being exhausted to the outside and minimizes generation of dust in the cut out part of the mask. CONSTITUTION: A mask for clean room comprises: a mask body(11) which is formed so that the length become narrow towards both side ends; a cover(14) which is thermally fused in the top end portion of the mask body and in which both side ends are thermally fused in both side ends of the mask body by ultrasonic wave and a metal or plastic wire is buried in the bottom; and a hanging band(12) in which both ends are fused with both side ends of the mask body by ultrasonic wave. The mask body, band, cover and a wrinkle part(13) are integrated by ultrasonic wave welding.

Description

Dust-free mask for clean room {Mask for clean room}

The present invention relates to a dust-free mask for a clean room for producing a semiconductor or the like. In particular, the present invention suppresses the occurrence of fine dust due to friction between the mask and the human body, masks and clothing or various devices, and completely covers the mouth, nose and chin of the operator to collect various foreign substances generated from the human body in the dust-free mask. It relates to a dust free mask for clean room.

In general, the mask is used to cover the external respiratory organs of the human body, namely, the mouth and nose, so that external contaminants such as dust do not enter the human body, and to prevent harmful substances such as germs from being transmitted from the human body. Therefore, masks are indispensable in dusty areas and hospitals, and are widely used in industrial sites that handle hazardous substances.

A typical mask is composed of a mask body provided with a filter member and ear bands provided at both ends of the mask body so as to be worn by an ear. Here, as the filter member, various types of filter paper such as nonwoven fabric, cotton, paper filter, or the like are used.

When the worker wears a mask and breathes, all the air is filtered while passing through the filter member of the mask body, and then is intaken and exhausted. Therefore, fine dust or contaminants are not introduced into the human body, and contaminants generated from the human body are not discharged into the air.

On the other hand, masks used for industrial purposes are commonly referred to as dust masks, in order to protect the health of workers in chemical factories, metal smelting sites, paper-related factories, textile factories and coal mines, where toxic gas emissions are high. I am wearing it.

In particular, at various work sites where organic gas such as acetone or IPA is used or generated, a mask having a dustproof function as well as a dustproof function is required. Therefore, in these places, the mask provided with the filter provided with the anti-gas function instead of the filter of nonwoven fabric, cotton, etc. is used a lot. In addition, when the work site is a clean room requiring cleanliness, it is necessary to completely block the discharge of contaminants generated from the human body to the work site.

An example of a dust free mask for a clean room used in a clean room such as a clean room for producing a semiconductor as described above has a structure in which a filter is attached between breathable cover members. In other words, a filter is positioned between the inner side cover of the face side and the outer side cover of the outer side to filter the air entering and exiting.

In this case, the filter is cut out and attached to the inside of the portion where the inner cover and the outer cover are coupled. This is because when the filter extends outside the coupling portion of the inner cover and the outer cover, fine dust generated from the filter may escape to the outside of the mask body and contaminate the inside of the clean room.

The above problem may occur regardless of the coupling form of the inner cover and the outer cover. That is, even when the inner cover and the outer cover are bonded using ultrasonic waves, fine dust may be generated at the interface where the ultrasonic molding is performed and may escape to the outside of the mask body.

Accordingly, when shaping the filter, only the inside of the engaging portion and the ultrasonic bonding portion of the inner cover and the outer cover are molded. However, since the fine dust generated by the filter itself cannot be prevented from escaping to the outside of the mask body through the outer cover, there is a limit that cannot completely prevent the clean room from being contaminated by the dust free mask for the clean room having the filter. .

In addition, as a prior art, a method of completely covering a worker's head and face using a dust mask and a mask (refer to Korean Patent Application Publication No. 10-2006-40840) has appeared, which is inconvenient to wear, and a dustproof hair and various devices during work. Fine dust or foreign substances can be generated due to breathing or various actions from contact with workers or workers.

In addition, the 'dust mask' of the Republic of Korea Utility Model No. 20-121188 or the 'dust mask of the clean room' of the Patent Publication No. 10-2008-26347, etc., unlike the above-described prior art, it has good ventilation and friction Disclosed is a technique capable of suppressing occurrence.

However, the above-described prior art is easy to wear and reduce the occurrence of lint or dust due to friction, but the mask member or the dust mask is made of a rectangular shape to finish the mask member or the outer edge of the mask member, Since a portion such as an end of a hanger band connected to both ends of the mask member is formed by a cutting knife, the microfibers, which are materials of the mask member and the member forming the finishing material, are exposed to the ends as they are separated from the member. There is a problem that acts as a pollutant itself.

The present invention for solving the conventional problems as described above is to prevent the foreign body such as saliva to be discharged to the outside due to a physiological action such as breathing, and to minimize the occurrence of lint or fine dust at the cut portion of the mask itself. The purpose is to make it possible.

The dust-free mask for a clean room according to the present invention for achieving the above object is a mask body made of filter paper having a shape in which the upper and lower widths are narrowed toward both ends, and the upper end is opened at the upper end of the mask body by ultrasonic waves. A lid which is welded, both ends are thermally welded to both ends of the mask body by ultrasonic waves, and a metal or plastic wire is buried freely at the lower end, and each end thereof is ultrasonically welded to both ends of the mask body and has a length. In the dust-free mask for a clean room having a hanger band made of a stretchable material, the mask body and the hanger band, the cover and the pleats are cut and finished by ultrasonic sealing while being integrated by ultrasonic welding. Filter paper is attached to the lower part of the mask body The filter paper is folded to form a pleated portion having an outer circumference or a fold, and both sides of the pleated portion are welded to both end portions of the mask body by ultrasonic waves in a state where the pleated portion is folded to contact the back surface of the mask body. In use, the outer circumference or the folds of the wrinkles is characterized in that the pocket is formed to accommodate the operator's chin in the rear of the mask body.

The end of the mask body and the wrinkle portion is welded by ultrasonic waves, so as to maintain the shape of the mask body and the wrinkle portion, and to prevent lint from occurring at the end of the mask body and the wrinkle portion.

Therefore, according to the present invention, by forming the corner portion of the mask body in a curved shape, by ultrasonic welding the cutting of the filter paper and the adhesion of the filter paper and the filter paper, and the filter paper and the hanger band by ultrasonic welding, the physiological action of the worker such as breathing Therefore, foreign substances such as saliva are not discharged to the outside, and there is an effect of minimizing fluff and dust generation from the cut portion of the mask.

In the dust-free mask for a clean room according to the present invention, as shown in FIGS. 1 to 4, the curved mask body 11, the hanger band 12, the lid 14, and the wrinkles 13 are formed by ultrasonic sealing. It is cut and finished and integrated by ultrasonic welding, and is connected to both ends of the mask body 11 and the mask body 11, which are made of filter paper such as one or two or more layers of non-woven fabrics, etc. It is extended to the upper and lower ends of the hook band 12 and the mask body 11 that can be unfolded during use so that the pocket 19 is formed on the back of the mask body 11 to enhance the adhesion to the nose and jaw portion of the operator The cover 14 and the pleats 13 are included.

Here, in the clean room dust free mask including the mask body 11, the filter paper, that is, the cutting material 17, which is a material of the mask, is cut by ultrasonic waves, and maintains the shape of the clean room dust free mask including the mask body 11. The outer portion 21 is welded so as to suppress the generation of dust and lint due to friction while making it.

In addition, since the adhesion of the mask main body 11 and the hook band 12, the mask main body 11 and the wrinkle part 13, and the mask main body 11 and the cover 14 is performed by ultrasonic welding, a dust-free mask for a clean room is used. In addition to simplifying the manufacturing process, it is possible to reduce the occurrence of fine dust and lint by minimizing the friction factor between the clean room dust mask and the human body, clothing, and other equipment.

The cover 14 is attached to the rear surface of the mask body 11, the upper and lower width widen toward the center, and includes a nose portion together with the mask body 11 covering the mouth when the operator wears a clean mask for a clean room. It covers the worker's face.

Here, the cover 14 is attached to the upper end of the back of the mask body 11 by ultrasonic welding, wherein the upper end of the mask body 11 and the upper end of the cover 14 and both end portions 15a of the mask body 11 and Since both end portions 15b of the cover 14 are bonded by ultrasonic welding, the dust free mask for a clean room has a dome shape that can cover the face of an operator during use.

Particularly, since the metal or plastic wire 18 having the property of bending or deformation is freely formed at the upper end of the cover 14 horizontally by a separate filter paper, the operator wears a clean room dust-free mask and then the metal or plastic wire 18. By deforming the cover 14 can be in close contact with the nose portion with a lot of bending can increase the tightness. The embedding of the metal or plastic wire 18 is made by placing a metal or plastic wire 18 on the filter paper constituting the cover 14 and ultrasonically welding another filter paper thereon.

Ends of the hook band 12 are welded to the both ends 15a and 16a of the mask body 11 by ultrasonic waves. At this time, since the material of the hook band 12 is a stretchable material having a variable length, the operator's face Regardless of the shape, that is, the distance between the ears surrounding the mouth and the chin, everyone can wear it.

In addition, a separate filter paper is extended to the lower end of the mask body 11, and the filter paper is folded to be made of a pleat 13 having an outer circumference or a pleats 20, and the pleated portion 13 is a mask body 11. Both ends 16a of the wrinkle part 13 are welded to the both ends 16a of the mask main body 11 by the ultrasonic wave in the state folded to contact a back surface.

Accordingly, the cover 14, the mask body 11, and the wrinkles 13 are unfolded during use, thereby forming a dome shape that completely covers the operator's face, and the outer wrinkles or the wrinkles 20 of the wrinkles 13 are unfolded. Since the pocket 19 is formed to accommodate the worker's chin up to the neck portion, dust or lint generated from the face during work is collected in the pocket 19 without falling down.

1 is a perspective view of a dust free mask for a clean room according to the present invention.

2 is a rear view of the dust free mask for clean room according to the present invention.

3 is a sectional view taken along the line A-A of the dust free mask for clean room shown in FIG.

Figure 4 is an exemplary view showing a wearing state of the dust-free mask for the clean room disclosed in Figures 1-3.

-Explanation of symbols for the main parts of the drawings-

11: mask body 12: hanger band

13 wrinkles 14 cover

15a, 15b, 16a, 16b: end 17: cutting line

18: metal or plastic wire 19: pocket

20: outer circumference or coordination 21: outer

Claims (2)

A mask body 11 made of filter paper having a shape in which the upper and lower widths are narrowed toward both end portions, and an upper end portion is thermally welded to an upper end portion of the mask body 11 by ultrasonic waves, and both ends 15b are ultrasonically masked. A cover 14 in which metal or plastic wires 18 are thermally welded to both ends 15a of the main body 11 and freely bent at the lower end thereof, and both ends 15a and 16a of the mask main body 11. In the margin mask for a clean room provided with a hanger band 12 made of an elastic material, each end of which is welded by ultrasonic waves and whose length is variable, The mask body 11, the hook band 12, the cover 14 and the pleats 13 are cut and finished by ultrasonic sealing while being integrated by ultrasonic welding, A filter paper extends at a lower end of the mask body 11, and the filter paper is folded to form a pleat 13 having an outer circumference or a pleat 20, and when the pleated portion 13 is the mask body 11, Both sides end portions 16a of the wrinkle portion 13 are welded to both sides end portions 16a of the mask body 11 by ultrasonic waves in a folded state so as to contact the outer side of the wrinkle portion 13 when used. 20) The dust-free mask for clean room, characterized in that the pocket 19 to accommodate the chin of the operator is formed in the rear of the mask body 11 is extended. The method of claim 1, End portions of the mask body 11 and the wrinkle part 13 are welded 21 by ultrasonic waves, so that the shape of the mask body 11 and the wrinkle part 13 is maintained and the mask body 11 and the wrinkle part ( Dust-free mask for clean room, characterized in that to prevent the occurrence of lint at the end of 13).

Images