Duct cover for ventilation seat and method for manufacturing the same

Abstract

Channel cover (20) for a ventilation seat, the channel cover (20) comprising: a ventilation channel barrier layer (100) extending in a planar direction and comprising a bottom surface to be positioned on an upper portion of a seat frame (50); an adhesive layer (200) extending in the planar direction and having a top and a bottom surface having an adhesive property, wherein the bottom surface of the adhesive layer (200) is adhered to a top surface of the ventilation channel barrier layer (100) to combine them, and wherein the adhesive layer (200) has a cutting line (510, 520) arranged on its top surface to separate a release paper layer (210, 220, 230); and a nonwoven fabric layer (300) for covering an air flow path groove as it extends along the air flow path groove formed in a back surface of a seat cushion (10) and combined with the back surface of the seat cushion (10), wherein the nonwoven fabric layer (300) includes a bottom surface that is adhered to the top surface of the adhesive layer (200) and includes a lateral end portion that extends further outward than the cut line (510, 520) of the adhesive layer (200), thereby covering the cut line (510, 520).

Description

BACKGROUND OF THE INVENTIONField of the InventionThe present invention relates to a duct cover for a ventilation seat disposed on a rear side of a seat cushion of a ventilation seat for a vehicle to form an air flow path, and relates to a method of manufacturing the duct cover for a ventilation seat.Description of the Prior ArtA vehicle seat is suitably constructed to minimize the fatigue of a vehicle occupant during driving over a longer period of time.In recent years, various comfort devices have been incorporated into a vehicle seat to provide a more comfortable ride experience for an occupant. One such representative example is a seat having a heating function. Moreover, in recent years, there have been actively developed ventilation seats in which the air is circulated to increase comfort. Generally, a ventilation seat is configured to include a blower that blows air into a seat and a seat cushion in which many holes are formed to discharge the air from the blower from the seat.Flow paths to which many holes communicate are formed in the seat cushion of the ventilation seat such that the air introduced into the seat cushion is uniformly distributed. The flow path is connected to the blower and plays a role in distributing the air.In order to allow the outside air introduced by the blower to flow into the flow path in the seat cushion, a corrugated tube formed by welding a plurality of sheets is positioned below the seat cushion. The corrugated tube is connected to the blower via a connector. A duct cover covering the flow path in the seat cushion is positioned below the seat cushion such that the outside air introduced from the blower is not discharged from the seat.That is, the duct cover is positioned between the seat cushion and a cushion frame, thus sealing the flow path in the seat cushion. On the curved surfaces of the seat cushion and the cushion frame, however, there are depressions. It is difficult to make contact with these recesses.Moreover, the channel cover is made of a polypropylene (PP) plastic material. When a vehicle occupant sits on the ventilation seat, an unpleasant feeling is produced. When the duct cover is bent or folded between the seat cushion and the cushion frame, noise is generated and the tightness thereof is reduced.The above is intended merely to aid in understanding the background of the present invention and therefore should not be construed as falling within the scope of the related art already known to those skilled in the art.Japanese Patent Application No. JP 2013-233 860 A is an example of the prior art.Furthermore, from US 2018 / 0 126 880 A1 a cushion cover for a ventilation seat is known, comprising: a first adhesive layer having an upper surface coupled to a lower surface of a cushion part of the ventilation seat, the lower surface of the cushion being provided with an air flow channel; a non-permeable layer made of a non-permeable material and having an upper surface bonded to a lower surface of the first adhesive layer to block the air flow channel of the lower surface of the cushion part from outside; and a protective layer bonded to a lower surface of the non-permeable layer to direct friction between the non-permeable layer and a seat structure.SUMMARY OF THE INVENTIONAn object of the present invention is to provide a duct cover including a non-woven fabric layer for preventing the occurrence of noises by not using a polypropylene (PP) resin material and preventing introduced outside air from leaking.According to an aspect of the present invention, there is provided a duct cover for a ventilation seat, the duct cover comprising: a ventilation duct blocking layer having the shape of a plate extending in the planar direction and having the lower surface positioned on an upper portion of a seat frame; an adhesive layer extending in the planar direction, having the upper and lower surfaces having an adhesive property, having the lower surface bonded to an upper surface of the ventilation duct blocking layer to combine them, and having a cut line formed in the upper surface thereof for separating a release paper sheet; A non-woven fabric layer covering an airflow path groove when extending along the airflow path groove formed on a back surface of a seat pad and combined with the back surface of the seat pad, the bottom surface of which is bonded to a top surface of the adhesive layer, the lateral end portion of which extends further outward than the cut line in the adhesive layer, and thus covering the cut line from above.In the duct cover, the ventilation duct barrier layer may be formed of a mixture of polyethylene terephthalate (PET) and felt.In the duct cover, the vent duct barrier layer is woven and the felt has a proportion of 20 to 50 weight percent based on the weight of the PET.In the duct cover, the non-woven fabric layer may include: a first non-woven fabric layer formed so as to surround a through hole formed at a central portion thereof such that external air supplied from a blower is introduced into the air flow path groove; and a second non-woven fabric layer extending along the air flow path groove from each of both sides of the first non-woven fabric layer.In the channel cover, a first cut line for removing a first release paper sheet corresponding to a shape of the first nonwoven fabric layer may be formed in the adhesive layer to adhere the first nonwoven fabric layer to an upper surface of the adhesive layer, and the first nonwoven fabric layer may be adhered to the upper surface of the adhesive layer from which the first release paper sheet is removed, and may cover the first cut line from above.In the channel cover, a second cut line for removing a second release paper sheet corresponding to a shape of a second non-woven fabric layer may be formed in the adhesive layer to adhere the second non-woven fabric layer to an upper surface of the adhesive layer, and the second non-woven fabric layer may be adhered to the upper surface of the adhesive layer from which a second release paper sheet is removed, and may cover the second cut line from above.In the duct cover, a first cut line for removing a first release paper sheet formed to surround a through hole formed in a central portion thereof such that external air supplied from a blower is introduced into the airflow path groove may be formed in the adhesive layer, a second line for removing a second release paper sheet formed to extend along the airflow path groove from each of both sides of the first cut line may be formed in the adhesive layer, the nonwoven fabric layer may include a second nonwoven fabric layer formed to correspond to the second release paper sheet, and the second nonwoven fabric layer may be adhered to an upper surface of the adhesive layer from which the second release paper sheet is removed such that the first cut line and the second cut line are covered from above.In the channel cover, the nonwoven fabric layer may include a first nonwoven fabric layer formed to correspond to the first release paper sheet, and the first nonwoven fabric layer may be adhered to the upper surface of the adhesive layer from which the first release paper sheet is removed so as to cover a portion of the second nonwoven fabric layer from above.In the duct cover, the nonwoven layer may extend further outward than the airflow path groove such that it covers the airflow path groove when combined with the seat cushion.According to another aspect of the present invention, there is provided a method of manufacturing a duct cover for a ventilation seat, the method comprising: attaching an adhesive layer to an upper surface of a ventilation duct barrier layer; forming a cut line for separating a release paper sheet from the upper surface of the adhesive layer; and removing the release paper sheet corresponding to a nonwoven layer defined by the formed cut line, and attaching the nonwoven layer to the upper surface of the adhesive layer.The method may further include: removing a third release paper sheet attached to the top surface of the adhesive layer except the non-woven layer, and combining the top surface of the adhesive layer with a back surface of the seat pad, which is performed subsequent to the attaching of the non-woven layer.In the method, forming the cut line includes forming a first cut line corresponding to a first non-woven fabric layer formed so as to surround a through hole formed in a central portion thereof such that external air supplied from a blower is introduced into the air flow path groove, and further includes forming a second cut line corresponding to a second non-woven fabric layer extending along the air flow path groove from each of both sides of the first non-woven fabric layer.In the method, attaching the nonwoven layer to the top surface of the adhesive layer may include: removing a second release paper sheet defined by the second cut line and attaching the second nonwoven layer; and removing a first release paper sheet defined by the first cut line and attaching the first nonwoven layer.In the method, in attaching the first non-woven fabric layer, the first non-woven fabric layer may be adhered to the upper surface of the adhesive layer so as to cover a portion of the second non-woven fabric layer from above.The channel cover according to the present invention makes it possible to dispense with the use of a PP plastic material. The airflow path groove in the seat cushion is sealed with the channel cover including the ventilation channel blocking layer, the adhesive layer, and the non-woven layer. This provides the advantage that deformation due to depressions on the seat cushion is naturally prevented.Moreover, the cut line in the adhesive layer is covered with the non-woven layer. This has the advantage of preventing the leakage of outside air.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a diagram illustrating a pad of a ventilation seat according to an embodiment of the present invention; FIG. 2 is a diagram illustrating a frame of the ventilation seat according to the embodiment of the present invention; FIG. 3 is a diagram illustrating a channel cover of the related art; FIGS. 4 and 5 are diagrams each illustrating a channel cover according to an embodiment of the present invention; FIG. 6 is a diagram illustrating a state in which a ventilation channel blocking layer and an adhesive layer are combined according to an embodiment of the present invention; FIG. 7 is a diagram illustrating a nonwoven fabric layer according to an embodiment of the present invention; FIG. 8 is a diagram illustrating a state in which the nonwoven fabric layer is combined with the ventilation channel barrier layer and the adhesive layer according to the embodiment of the present invention; and FIG. 9 is a flow chart illustrating a method of manufacturing the duct cover for the ventilation seat according to an embodiment of the present invention.DETAILED DESCRIPTION OF THE INVENTIONEmbodiments of the present invention disclosed in the present specification or application will be described with reference to a specific structure and specific functions for ease of understanding. However, the embodiments of the present invention may be implemented in various ways, and the present invention should not be construed as being limited to the embodiments described in the present specification or application.Various modifications may be made to the embodiments of the present invention. Various embodiments may also be provided in accordance with aspects of the present invention. Hereinafter, specific embodiments will be described in detail with reference to the accompanying drawings. However, this description does not limit the embodiments according to the present invention to the specific embodiments disclosed, and all changes, equivalents, and substitutions included in the technical spirit of the present invention should be understood to fall within the scope of the present invention.The terms "first", "second", etc. may be used to describe various constituent elements, but are not intended to limit the meanings of the constituent elements. The terms described above are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of any claim defining the present invention, a first constituent element may be referred to as a second constituent element, and also a second constituent element may be referred to as a first constituent element.It should be understood that when a component is referred to as being "connected" or "coupled" to another component, the component may be connected or coupled to the other component, or an intervening component may be interposed therebetween. In contrast, it will be understood that when a component is referred to as being "directly connected" or "directly coupled" to another element, there is no intervening element present. In the same sense, other formulations describing a relationship between ingredients are to be understood, such as "between" and "just between" or "next to" and "next to".Terms are used in the present specification only to describe specific embodiments, and are not intended to impose limitations on the present invention. A term in the singular has the same meaning as a term in the plural, unless expressly stated otherwise within the context. It should be understood that the terms "comprise," "have," and the like used in the present specification are intended to indicate that a feature, number, step, operation, constituent element, component, or combination thereof is present, and that the term does not preclude the likelihood that one or more other features, numbers, steps, operations, constituent elements, or combinations thereof are present and added.Unless otherwise defined, all terms, including technical or scientific terms, used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art. The term as defined in generally customary dictionaries should be interpreted as having the same meaning in this context as in the relevant prior art and, unless expressly defined otherwise in the present specification, should not be interpreted as having an original meaning or a purely literal meaning.Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numeral in the drawings represents the same constituent element.FIG. 1 shows a cushion of a ventilation seat according to an embodiment of the present invention. FIG. 2 illustrates a frame of the ventilation seat according to an embodiment of the present invention.In FIGS. 1 and 2, a cushion 10 of the ventilation seat is positioned at an upper position of a frame 50. Outside air is supplied to the bolster 10 through a duct 70 connected to a blower (not illustrated) within the frame 50. Specifically, the duct 70 is connected to a duct cover 20 attached to a rear side of the pad 10 through a connector 60 and a corrugated tube 40, the duct cover 20 seals a flow path (not illustrated) formed in the pad 10, and thus the outside air supplied through the duct 70 is supplied to the pad 10.One end of the corrugated pipe 40 for the ventilation seat according to the present invention is combined with the duct cover 20. The other end is combined with the connector 60. Thus, the corrugated tube 40 is positioned between the cushion 10 of the air seat and the frame 50. The corrugated tube 40 is combined with the duct cover 20 with an adhesive film 30 or the like.The corrugated tube 40 may become longer or shorter in the longitudinal direction. Although deformation occurs when a vehicle occupant sits on the ventilation seat, airtightness is maintained, and thus leakage of the outside air supplied from the blower (not illustrated) can be prevented. In particular, a film formed from a thin thermoplastic polyurethane (TPU) material according to the present invention is thin and easy to process. This offers the advantage that the packing of the ventilation seat is accomplished in a simple and secure manner.FIG. 3 illustrates a prior art channel cover.As shown in FIG. 3, the prior art channel cover is formed to include a felt 10, a lower adhesive layer 20, a plastic layer 30, and an upper adhesive layer.Specifically, the upper adhesive layer 40 is removed along an airflow path groove formed in the back side of a seat cushion, and is formed so as to expose the resin layer 30 along the airflow path groove.However, the resin layer 30 is formed of a PP material. As such, in the duct cover of the related art, a height difference arises between curved surfaces of the seat cushion and the frame. As a result, a portion of the channel cover becomes higher. When the vehicle occupant sits on the ventilation seat, the upwardly protruding portion is bent accordingly. This gives rise to a feeling of discomfort and noise.Moreover, the cost of a PP material accounts for a relatively large proportion of the manufacturing cost, thereby increasing the unit price of the product. When the occupant sits on the vent seat, a difference in the amount of deformation due to the physical properties of the layers included in the duct cover causes the separation from the seat cushion. Thus, airtightness is not ensured.FIGS. 4 and 5 are diagrams each illustrating a channel cover according to an embodiment of the present invention.In FIGS. 4 and 5, the duct cover according to the embodiment of the present invention includes a ventilation duct blocking layer 100 having the shape of a plate extending in the planar direction and having the lower surface disposed on an upper portion of a seat frame; an adhesive layer 200 extending in the planar direction, having the upper and lower surfaces having an adhesive property, having the lower surface bonded to an upper surface of the ventilation duct blocking layer 100 to combine them, and having a cut line formed in the upper surface thereof for separating a release paper sheet; A non-woven fabric layer 300 that covers an airflow path groove when extending along the airflow path groove formed on a back surface of a seat cushion and combined with the back surface of the seat cushion, the bottom surface of which is bonded to a top surface of the adhesive layer 200, the lateral end portion of which extends further outward than the cut line in the adhesive layer 200, and thus covers the cut line from above.Accordingly, a PP plastic material is not used, and the airflow path groove in the seat cushion is sealed with the channel cover including the ventilation channel blocking layer 100, the adhesive layer 200, and the non-woven fabric layer 300. This provides the advantage that deformation due to depressions on the seat cushion is naturally prevented. In addition, the cut line in the adhesive layer 200 is covered with the non-woven fabric layer 300. This has the advantage of preventing the outside air from leaking.The adhesive layer 200 may be formed of the same material as a tape of which both sides have an adhesive property. A lower surface of the adhesive layer 200 is combined with the vent channel barrier layer 100, and the release paper sheet is attached to the upper surface of the adhesive layer 200. The release paper sheet may be later removed to apply the nonwoven layer 300.The vent duct barrier layer 100 is located on the upper portion of the seat frame and may come into direct contact with the seat frame. The ventilation duct blocking layer 100 itself can air-tightly block an air flow.More specifically, the vent channel barrier layer 100 may be formed from a mixture of polyethylene terephthalate (PET) and felt. The ventilation duct blocking layer 100 is disposed at a position where it can come into direct contact with the seat frame. Therefore, the ventilation channel blocking layer 100 needs to be durable for a long time. When the ventilation duct blocking layer 100 is formed of a mixture of PET and felt, it has a property of air-tightly blocking an air flow. This has the advantage that longevity is improved.More specifically, the vent channel barrier layer 100 is formed of a material having a blend woven therein comprising 20 to 50 weight percent felt based on the weight of the PET fabric. That is, the ventilation channel blocking layer 100 may be a mixed fabric woven with a mixture resulting from mixing the PET fabric and the felt.More specifically, the non-woven fabric layer 300 may include: a first non-woven fabric layer 310 formed to surround a through hole 400 formed at a central portion thereof such that the outside air supplied from the blower is introduced into the air flow path groove; and a second non-woven fabric layer 320 extending along the air flow path groove from each of both sides of the first non-woven fabric layer 310.The first non-woven fabric layer 310 may be formed such that the through hole 400 communicating with an air flow path formed in the ventilation channel blocking layer 100 and the adhesive layer 200 is formed at the central portion thereof. Moreover, the first non-woven fabric layer 310 may be formed to cover the through hole 400. The outside air is introduced into the through hole 400. The airflow path may communicate with the airflow path groove in the seat cushion covered with the duct.On the central portions of the ventilation channel blocking layer 100 and the adhesive layer 200, the second non-woven fabric layers 320 may extend along the air flow path groove formed in the seat cushion from either side of the first non-woven fabric layer 310. This has an advantage of improving airtightness so as to seal the airflow path groove with the second non-woven fabric layer 320 and preventing the adhesive layer 200 from adhering to the inside of the airflow path groove.The first non-woven layer 310 and the second non-woven layer 320 may be made of the same material, but may be made of different materials. The first nonwoven layer 310 may be combined with or integrally formed with a separate component connected to the channel.According to an embodiment, a first cut line 510 for removing a first release paper sheet 210 corresponding to a shape of the first nonwoven layer 310 may be formed in the adhesive layer 200 to adhere the first nonwoven layer 310 to an upper surface of the adhesive layer 200, and the first nonwoven layer 310 may be adhered to the upper surface of the adhesive layer 200 from which the first release paper sheet 210 is removed, and may cover the first cut line 510 from above.The first cut line 510 may be a cut line for separating the first release paper sheet 210 corresponding to the shape of the first non-woven fabric layer 310. By means of a half cut, the first release paper sheet 210, which is one of the release paper sheets attached to an upper portion of the adhesive layer 200, can be separated.The first nonwoven layer 310 may be adhered to the adhesive layer 200 from which the first release paper sheet 210 is removed, and may cover the first cut line 510. This accordingly has an advantage that leakage of air through the first cut line 510 can be prevented.A second cut line 520 for removing a second release paper sheet 220 corresponding to a shape of the second nonwoven layer 320 may be formed in the adhesive layer 200 to adhere the second nonwoven layer 320 to the top surface of the adhesive layer 200, and the second nonwoven layer 320 may be adhered to the top surface of the adhesive layer 200 from which the second release paper sheet 220 is removed, and may cover the second cut line 520 from above.The second cut line 520 may be formed to remove the second release paper layer 220 corresponding to the second nonwoven fabric layer 320 extending through the airflow path groove from both sides of the first cut line 510.The second non-woven fabric layer 320 may be attached to the upper portion of the adhesive layer 200 in a state in which the second release paper layer 220 defined by the second cut line 520 is removed. Accordingly, this provides an advantage that the air flowing through the airflow path groove can be prevented from leaking into a space other than the seat pad.The first non-woven fabric layer 310 and the second non-woven fabric layer 320 may extend to be larger than the airflow path groove formed in the seat cushion. Accordingly, although the seat cushion is deformed, the entire airflow path groove is covered. This has the advantage that air tightness is maintained.For example, the first cut line 510 and the second cut line 520 may be formed to resemble the airflow path groove. The first nonwoven layer 310 and the second nonwoven layer 320 may be formed to be larger than the first cut line 510 and the second cut line 520, respectively, to cover them. In this way, the entire airflow path groove can be covered.According to another embodiment, the first cut line 510 and the second cut line 520 may be formed in the adhesive layer 200. The first cut line 510 serves to remove the first release paper sheet 210 formed to cover the through hole 400 located at the central portions of the ventilation channel blocking layer 100 and the adhesive layer 200. The second cut line 520 is for removing the second release paper layer 220 formed to extend from each of both sides of the first cut line 510 along the airflow path groove. The nonwoven layer 300 may include the second nonwoven layer 320 formed to correspond to the second release paper layer 220. The second nonwoven layer 320 may be adhered to the upper surface of the adhesive layer 200 from which the second release paper layer 220 is removed, such that it covers the first cut line 510 and the second cut line 520 from above.That is, the nonwoven layer 300 may include the second nonwoven layer 320. The second non-woven fabric layer 320 may be adhered to the upper surface of the adhesive layer 200 in a state where only the part of its shape corresponding to the second release paper layer 220 between the first cut line 510 and the second cut line 520 is removed.Instead of the first nonwoven layer 310, a separate component may be combined with the first release paper layer 210 defined by the first cut line 510. For example, a corrugated tube that connects between the duct cover and the connector of the seat frame may also be included, and a separate component that is combined with an upper portion of the corrugated tube may be combined with a position of the first release paper sheet 210.In this case, the second non-woven fabric layer 320 may be formed to be larger than the second release paper layer 220 such that it covers both the first cut line 510 and the second cut line 520 from above.According to an embodiment, in a state of being laterally combined with the second nonwoven layer 320 by being brought into contact therewith, the first nonwoven layer 310 may be adhered to the top surface of the adhesive layer 200 at the same moment as the second nonwoven layer 320. Alternatively, a flank surface of the first non-woven fabric layer 310 may be adhered to a flank surface of the second non-woven fabric layer 320 in a state where the second non-woven fabric layer 320 is attached, so as to be brought into contact therewith.According to another embodiment, the nonwoven layer 300 may include the first nonwoven layer 310 formed to correspond to the first release paper sheet 210, and the first nonwoven layer 310 may be adhered to the top surface of the adhesive layer 200 from which the first release paper sheet 210 is removed so as to cover a portion of the second nonwoven layer 320 from above.That is, the first non-woven fabric layer 310 may be formed to cover a portion of the second non-woven fabric layer 320 from above. In particular, the first cut line 510 may be covered. Accordingly, the outside air cannot escape through a gap formed between the first non-woven fabric layer 310 and the second non-woven fabric layer 320. In addition, an upper portion of the second non-woven fabric layer 320 can be prevented from rising when considering a flow direction of the air flowing in an extending direction from the through hole 400 through which the outside air is introduced to the air flow path groove.The nonwoven layer 300 may extend further outward than the airflow path groove such that it covers the airflow path groove when combined with the seat cushion. In particular, the second nonwoven layer 320 may extend further outward than the airflow path groove. Therefore, although the seat cushion is deformed, the air flow path groove may be covered. The first non-woven fabric layer 310 may also be formed to extend further outward than the airflow path groove formed in the seat cushion while covering the through hole 400.FIG. 6 illustrates a state in which the ventilation channel blocking layer 100 and the adhesive layer 200 are combined according to an embodiment of the present invention. FIG. 7 illustrates the nonwoven layer 300 according to an embodiment of the present invention. FIG. 8 illustrates a state in which the nonwoven fabric layer 300 is combined with the ventilation channel blocking layer 100 and the adhesive layer 200 according to an embodiment of the present invention. FIG. 9 is a flow chart illustrating a method of manufacturing the duct cover for the ventilation seat according to an embodiment of the present invention.Referring to FIGS. 6 to 9, the method of manufacturing the duct cover for the ventilation seat includes: the step S 100 of adhering the adhesive layer 200 to the upper surface of the ventilation duct barrier layer 100; the step S 200 of forming the cut line for separating the release paper sheet from the upper surface of the adhesive layer 200; and the step S 300 of removing the release paper sheet corresponding to the nonwoven fabric layer 300 defined by the formed cut line and fixing the nonwoven fabric layer 300 to the upper surface of the adhesive layer 200.Specifically, FIG. 6 illustrates a state in which only the cut lines 510 and 520 are formed in a state in which the release paper sheets 210, 220, and 230 have not been removed from the top surface of the adhesive layer 200.Further, the step S 400 of removing the third release paper sheet 230 attached to the upper surface of the adhesive layer 200 except the non-woven fabric layer 300 and combining the upper surface of the adhesive layer 200 with the back surface of the seat pad may be included, which is performed subsequent to the step S 300 of attaching the non-woven fabric layer 300.The third release paper sheet 230 refers to an outer portion of the second release paper sheet 220 in a state where the first release paper sheet 210 and the second release paper sheet 220 belonging to the release paper sheets attached to the upper surface of the adhesive layer 200 have been removed. That is, after the nonwoven layer 300 is attached, the remaining release paper layers may be removed, and the top surface of the adhesive layer 200 may be combined with the back surface of the seat cushion.In step S 200 of forming the cut line, the first cut line 510 corresponding to the first non-woven fabric layer 310 formed so as to surround the through hole 400 formed at its central portion such that the outside air supplied from the blower is introduced into the air flow path groove, and the second cut line 520 corresponding to the second non-woven fabric layer 320 extending along the air flow path groove from each of both sides of the first non-woven fabric layer 310 may be formed in the adhesive layer 200.The second release paper layer 220 may be formed so as to be removable with the first cut line 510 and the second cut line 520. The first release paper sheet 210 and the second release paper sheet 220 may be formed to resemble the airflow path groove in the seat cushion. The first nonwoven layer 310 and the second nonwoven layer 320 may be formed to be larger than the airflow path groove and thus extend further outward than these.The step S 300 of attaching the nonwoven fabric layer 300 to the upper surface of the adhesive layer 200 may include the step S 310 of removing the second release paper sheet 220 defined by the second cut line 520 and attaching the second nonwoven fabric layer 320, and the step S 320 of removing the first release paper sheet 210 defined by the first cut line 510 and attaching the first nonwoven fabric layer 310.That is, in a state in which the second release paper sheet 220 has been removed, the second non-woven fabric layer 320 may be attached, and subsequently, in a state in which the first release paper sheet 210 has been removed, the first non-woven fabric layer 310 may be attached. The second nonwoven layer 320 may cover both the first cut line 510 and the second cut line 520 from above.The first nonwoven layer 310 may include a separate component connected to the channel on the seat frame side.Specifically, in step S 320 of attaching the first non-woven fabric layer 310, the first non-woven fabric layer 310 may be adhered to the upper surface of the adhesive layer 200 so as to cover a portion of the second non-woven fabric layer 320 from above.As illustrated in FIG. 7, the first non-woven fabric layer 310 and the second non-woven fabric layer 320 may be simultaneously attached to the upper portion of the adhesive layer 200 such that their flank surfaces are brought into contact with each other.However, the second non-woven fabric layer 320 may be first attached, and then the first non-woven fabric layer 310 may be attached to the upper portion of the adhesive layer 200 so as to cover a portion of the second non-woven fabric layer 320. The first nonwoven layer 310 may overlap a portion of the second nonwoven layer 320 covering the first cut line 510, and thus may cover the first cut line 510. This accordingly provides an advantage that airtightness is improved by the non-woven fabric layer 300.Moreover, the first non-woven fabric layer 310 covers a part of the upper portion of the second non-woven fabric layer 320 when air is considered to flow from an upper portion of the first non-woven fabric layer 310 to an upper portion of the second non-woven fabric layer 320. This has an advantage that the first non-woven fabric layer 310 overlapped due to an air flow can be prevented from rising.Specific embodiments of the present invention have been illustrated and described, and it will be apparent to those skilled in the art that various modifications and changes can be made to the present invention without departing from the technical spirit behind the present invention claimed in the following claims.

Claims

A duct cover (20) for a ventilation seat, the duct cover (20) comprising: a ventilation duct barrier layer (100) extending in a planar direction and comprising a bottom surface to be positioned on an upper portion of a seat frame (50); an adhesive layer (200) extending in the planar direction and having top and bottom surfaces having an adhesive property, wherein the bottom surface of the adhesive layer (200) is adhered to a top surface of the ventilation duct barrier layer (100) to combine them, and wherein the adhesive layer (200) has a cut line (510, 520) disposed on the top surface thereof to separate a release paper sheet (210, 220, 230); A nonwoven fabric layer (300) for covering an airflow path groove when extending along the airflow path groove formed in a rear side of a seat cushion (10) and combined with the rear side of the seat cushion (10), wherein the nonwoven fabric layer (300) comprises a bottom surface bonded to the top surface of the adhesive layer (200) and a side end portion extending further outward than the cut line (510, 520) of the adhesive layer (200), thereby covering the cut line (510, 520).The duct cover of claim 1, wherein the vent duct barrier layer (100) is formed from a mixture of polyethylene terephthalate (PET) and felt.The duct cover of claim 2, wherein the vent duct barrier layer (100) is woven and the felt comprises a proportion of 20 to 50 weight percent based on the weight of the PET.The duct cover according to claim 1, wherein the non-woven fabric layer (300) comprises: a first non-woven fabric layer (310) formed so as to surround a through hole (400) formed at its central portion such that external air supplied from a blower is introduced into the air flow path groove; and a second non-woven fabric layer (320) extending along the air flow path groove from each of both sides of the first non-woven fabric layer.The channel cover of claim 4, wherein the cut line (510, 520) comprises a first cut line (510) for removing a first release paper sheet (210) corresponding to a shape of the first nonwoven layer (310) disposed on the adhesive layer (200) to adhere the first nonwoven layer (310) to the top surface of the adhesive layer (200), and the first release paper sheet (210) has been removed from the adhesive layer (200) and covers the first cut line (510).The channel cover of claim 5, wherein the cut line comprises a second cut line (520) for removing a second release paper sheet (220) corresponding to a shape of the second nonwoven layer (320) disposed on the adhesive layer (200) to adhere the second nonwoven layer (320) to the top surface of the adhesive layer (200), and the second release paper sheet (220) has been removed from the adhesive layer (200) and covers the second cut line (520).The channel cover according to claim 1, wherein the cut line (510, 520) comprises the first cut line (510) for removing the first release paper sheet (210) formed to surround a through hole (400) disposed at its central portion such that outside air supplied from a blower is introduced into the air flow path groove, wherein the cut line (510, 520) further comprises the second cut line (520) for removing the second release paper sheet (220) formed to extend along the air flow path groove from each of two sides of the first cut line, wherein the nonwoven fabric layer (300) comprises the second nonwoven fabric layer (320) formed to correspond to the second release paper sheet (220), and wherein the second nonwoven fabric layer (320) is bonded to the top surface of the adhesive layer (200), The second release paper sheet (220) is stuck to cover the first cut line (510) and the second cut line (520).The channel cover according to claim 7, wherein the nonwoven fabric layer (300) comprises the first nonwoven fabric layer (310) formed to correspond to the first release paper sheet (210), and the first nonwoven fabric layer (310) is adhered to the top surface of the adhesive layer (200) from which the first release paper sheet (210) has been removed, such that a portion of the second nonwoven fabric layer (320) is covered.The duct cover of claim 1, wherein the nonwoven layer (300) extends further outward than the airflow path groove such that it covers the airflow path groove when combined with the seat cushion (10).A method of manufacturing a duct cover (20) for a ventilation seat, the method comprising: attaching an adhesive layer (200) to a top surface of a ventilation duct barrier layer (100); forming a cut line (510, 520) for separating a release paper sheet (210, 220, 230) from the top surface of the adhesive layer (200); and removing the release paper sheet (210, 220) corresponding to a nonwoven layer (300) defined by the formed cut line (510, 520), and attaching the nonwoven layer (300) to the top surface of the adhesive layer (200).The method of claim 10, further comprising: removing a third release paper sheet (230) attached to the top surface of the adhesive layer (200) except the non-woven layer (300); and combining the top surface of the adhesive layer (200) with a back surface of the seat cushion (10), which is performed subsequent to the attaching of the non-woven layer (300).The method of claim 10, wherein forming the cut line (510, 520) comprises forming a first cut line (510) corresponding to a first non-woven fabric layer (310) formed to surround a through hole (400) formed in a central portion thereof such that external air supplied from a blower is introduced into the air flow path groove, and forming a second cut line (520) corresponding to a second non-woven fabric layer (320) extending along the air flow path groove from each of both sides of the first non-woven fabric layer (310).The method of claim 12, wherein attaching the nonwoven layer (300) to the top surface of the adhesive layer (200) comprises: removing a first release paper sheet (210) defined by the first cut line (510) and attaching the first nonwoven layer (310); and removing a second release paper sheet (220) defined by the second cut line (520) and attaching the second nonwoven layer (320).The method of claim 13, wherein, upon attaching the first nonwoven layer, the first nonwoven layer (310) is adhered to the top surface of the adhesive layer (200) so as to cover a portion of the second nonwoven layer (320).

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