Web for down padding and four-directional highly stretchable and highly heat retaining ultra lightweight down padding including the same

Abstract

To provide a web for down padding having an optimized composition so as to have excellent heat retaining property while greatly increasing stretchability and stability of a down padding by manufacturing an integrated sheet type down padding without forming a compartment structure causing cold spots and without needle punching, and also to provide an ultra lightweight down padding including the web for down padding as a filler (or a web layer).SOLUTION: A web for down padding includes a mixed down including one or more types of down selected from goose down and duck down, non-drawing low melting sheath-core composite fibers, HCT (Hollow Conjugate Stretch) single fibers, and RSS (Regular Solid Siliconized) single fibers.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an ultra-lightweight down padding that is not only thin but also has excellent heat retention and excellent four-way (or multi-way) stretchability, a down padding web used in the manufacture of the same, and a method for manufacturing the same. [Background technology]

[0002] Down products made from duck or goose feathers are used as cold-weather clothing to maintain body temperature during outdoor activities in winter. Because the down fluff contains a large amount of air between the fluff and has excellent heat retention, they have become popular as luxury items on the market.

[0003] As such down products have emerged as a main item in winter fashion, the popularity of ultra-lightweight down jackets that are light and easy to carry is steadily increasing, and as a result, much development is being done in relation to heat retention and light weight.

[0004] However, in the case of down padding, the fluff lacks restoring and supporting power, and down comes out along the seams, causing dissatisfaction with the quality, as well as the down's characteristic smell, which causes the down to clump together, resulting in poor product appearance and difficulty in washing. In order to prevent down products from losing feathers and clumping together, the core layer of the down padding (web made of down) and the lining are sewn together and cut into a structure with multiple compartments, or the lining and outer fabric are sewn together and cut into a structure with multiple compartments, and then down is filled into the compartments to manufacture the down padding, thereby manufacturing a structure in which down is filled inside the multiple compartments, i.e., a structure in which down is filled between the seams (e.g., a quilted structure), but down padding with such a structure has the problem of cold spots occurring, reducing heat retention.

[0005] In addition, recent trends in clothing products are placing emphasis on both design and activity, but as mentioned above, the down padding with compartment structure has poor elasticity and restoration, and the thickness of the down padding is very thick in order to ensure high insulation and heat retention, so there is a problem that it does not fit with recent fashion trends. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Korean Patent No. 10-1334624 (Announcement date: 2013.11.25) [Patent Document 2] Korean Patent No. 10-1669938 (Announcement date: 2016.10.21) Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention provides a down padding web having an optimized composition so that it has excellent heat retention while greatly increasing the stretchability and recovery of the down padding, and is manufactured as an integrated sheet type without needle punching, and does not form a compartment structure that generates cold spots in the down padding, and also provides an ultra-lightweight down padding containing the same as a filler (or web layer). [Means for solving the problem]

[0008] The down padding web of the present invention for solving the above-mentioned problems includes a mixed down containing at least one selected from goose down and duck down, a non-stretchable low melting sheath-core bicomponent fiber, a hollow conjugate stretch (HCT) monofilament, and a regular solid siliconized fiber (RSS) monofilament.

[0009] In a preferred embodiment of the present invention, the blended down contains 15-30% by weight of feathers and 70-85% by weight of down.

[0010] In a preferred embodiment of the present invention, the sheath of the non-stretchable low melting point sheath-core composite fiber has a melting point of 100 to 150°C, and the core has a melting point of 250°C or higher.

[0011] In a preferred embodiment of the present invention, the non-drawable low melting point sheath-core composite fiber has an average fineness of 3.0-5.0 de and an average fiber length of 45-60 mm.

[0012] In a preferred embodiment of the present invention, the HCT monofilament and the RSS monofilament each have a melting point of 260° C. or higher.

[0013] In a preferred embodiment of the present invention, the HCT single fiber has an average fineness of 2.0 to 3.5 de, an average fiber length of 45 to 60 mm, and a crimp number of 15 to 23 per inch.

[0014] In a preferred embodiment of the present invention, the RSS single fiber has an average fineness of 2.0 to 3.5 de and an average fiber length of 45 to 60 mm.

[0015] As a preferred embodiment of the present invention, the down padding web of the present invention comprises 25.0-50.0% by weight of the mixed down, 9.0-18.0% by weight of the HCT monofilament, 13.0-21.0% by weight of the RSS monofilament, and the remainder out of 100% by weight of the non-stretchable low melting point sheath-core bicomponent fiber.

[0016] In a preferred embodiment of the present invention, the down padding web of the present invention has a basis weight of 70 to 150 g / m 2 It could be.

[0017] Another object of the present invention relates to an ultra-lightweight down padding with high four-way elasticity and high heat retention, comprising: a web layer made of the aforementioned down padding web; and sheet layers laminated on the upper and lower parts of the web layer and bonded to the web layer.

[0018] In one preferred embodiment of the present invention, the down padding of the present invention is a composite sheet in which a web layer and a sheet layer are integrally bonded together, which is free of cell structure and needle punching that cause cold spots.

[0019] In one preferred embodiment of the present invention, the sheet layer may include a multi-directional extensible fabric having a net structure woven with highly elastic polyester yarn.

[0020] In one preferred embodiment of the present invention, an acrylic resin layer can be included between the web layer and the sheet layer.

[0021] In a preferred embodiment of the present invention, the basis weight of the web layer of the present invention is 80 to 100 g / m 2 When the temperature is 100° C., the heat retention measured according to the ASTM D1518 method can satisfy 2.00 CLO or more.

[0022] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the material is made of a material having a thickness of 100 mm or less, the air permeability measured based on the ASTM D737 method can be 100 CFM (Cubie feet peer minute) or more.

[0023] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the drying ratio is 30.0% or more after 1 hour, the drying ratio measured according to JIS L 1096 method can satisfy the requirement.

[0024] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m2 When the above condition is satisfied, the recovery rate can be 83.0% or more.

[0025] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the residual extension is less than 6.5% after 30 seconds, the residual extension is less than 8.0% in the longitudinal direction and less than 8.0% in the transverse direction, as measured based on the ASTM D3107 method and calculated by the formula 2.

[0026] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the residual extension is less than 3.0% after 30 minutes, the residual extension is less than 4.5% in the longitudinal direction and less than 3.0% in the transverse direction, as measured based on the ASTM D3107 method and calculated by the formula 2.

[0027] [Formula 2] Residual Extension (growth,%) = [{(original length + unrecovered length) - original length} / original length] x 100%

[0028] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the thickness is 100 mm or less, the recovery rate after 30 seconds measured according to the ASTM D3107 method and calculated according to Equation 3 can satisfy 70.0% or more in the longitudinal direction and 65.0% or more in the transverse direction.

[0029] In a preferred embodiment of the present invention, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the thickness is 100 mm or less, the recovery rate after 30 minutes measured according to the ASTM D3107 method and calculated according to Equation 3 can satisfy 75.0% or more in the longitudinal direction and 75.0% or more in the transverse direction.

[0030] [Formula 3] Recovery rate (%) = [{maximum elongation length - (original length + unrecovered length)} / (maximum elongation length - original length)] × 100%

[0031] Another object of the present invention is to provide a method for producing the ultra-lightweight down padding having high four-way elasticity and high heat retention, comprising the steps of: (1) supplying raw yarn in a bale state to a supply unit; (2) carrying out a bale breaking and an opening process on the raw yarn supplied to the supply unit; and (3) subjecting the opened raw yarn to a cardigan. The process includes three steps: carding the carded yarn; processing and manufacturing the carded yarn into a web; applying acrylic resin to both surfaces of the web and then drying the web; and heat-treating the surface of the web to which the acrylic resin has been applied, laminating sheets on both sides of the web, rolling the web with a heating roll, and packaging the web. This can be done. Effect of the Invention

[0032] The down padding of the present invention is an ultra-lightweight down padding with no cold spots, excellent heat retention and insulation, and excellent elasticity and recovery, which means that there is very little deformation. In addition, the down padding of the present invention has excellent drying properties compared to existing down padding, and there is no down detachment. [Brief description of the drawings]

[0033] [Figure 1] 1 is a schematic diagram of the cross-sectional structure of the down padding of the present invention; [Diagram 2] FIG. 1 is a schematic diagram of the down padding manufacturing process of the present invention. [Diagram 3] Photographs (A and B) of the down padding produced in Example 1. [Figure 4] 1 is a photograph of the device used to measure elasticity in Experimental Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] As used herein, the term "non-extensible" refers to having very low elongation and recovery, and refers to the property of having such low elasticity that the fiber cannot return to its original shape after being stretched by an external force.

[0035] As used herein, the term "four directions" refers to both directions in which the down padding stretches in a two-dimensional plane and both directions perpendicular thereto.

[0036] The present invention will be described in more detail below.

[0037] The down padding web of the present invention is a web free of cold spots, and is a sheet-form web free of cell structure and needle punching.

[0038] The web for down padding of the present invention is made of a mixture of down including at least one selected from goose down and duck down, non-stretchable low melting sheath-core composite fiber, HCT (Hollow Conjugate Stretch) monofilament, and RSS (Regular Solid The fibers may include monofilaments of silicone-based fibers.

[0039] The mixed down includes at least one selected from goose down and duck down. At this time, the mixture of mixed down does not mean a mixture of goose and / or duck down, but a mixture of feathers and down.

[0040] The mixed down may contain 15-30% by weight of feathers and 70-85% by weight of down, preferably 15-25% by weight of feathers and the remainder of the down from 100% by weight, and more preferably 17.5-22.5% by weight of feathers and the remainder of the down from 100% by weight. At this time, if the feather content is less than 15.0% by weight, the down content is too high, which may cause a significant loss in price competitiveness, and if the feather content exceeds 30.0% by weight, the heat retention may be somewhat reduced and the surface of the product may be uneven, so it is better to use feathers and down within the above ranges when considering heat retention and marketability.

[0041] The non-stretchable low melting point sheath-core composite fiber is a fiber that functions to bind the mixed down and other fibers in the web and stabilize the shape of the web. It is a fiber that has no elasticity.

[0042] The sheath of the non-stretchable low melting point sheath-core composite fiber may be made of a PET (polyethylene terephthalate) resin having a melting point of 100 to 150° C., preferably a melting point of 105 to 130° C., and more preferably a melting point of 105 to 120° C. The core of the non-stretchable low melting point sheath-core composite fiber may be made of a PET resin having a melting point of 250° C. or higher, preferably a melting point of 250 to 280° C., and more preferably a melting point of 255 to 275° C.

[0043] At this time, if the melting point of the resin forming the sheath is less than 100°C, there may be a problem of poor fusion, and if the melting point of the resin forming the sheath is more than 150°C, there may be a problem of the product becoming hard. Also, if the melting point of the resin forming the core is less than 250°C, there may be a problem of the connection between the original threads becoming loose, and if the melting point of the resin forming the core is more than 280°C, there may be a problem of the connection parts between the original threads becoming hard and set.

[0044] The non-stretchable low melting point sheath-core composite fiber can have an average fineness of 3.0-5.0 de and an average fiber length of 45-60 mm, preferably an average fineness of 3.5-4.7 de and an average fiber length of 45-58 mm, more preferably an average fineness of 3.7-4.5 de and an average fiber length of 48-55 mm. In this case, if the average fineness of the non-stretchable low melting point sheath-core composite fiber is less than 3.0 de, there may be a problem of low thickness, and if the average fineness of the non-stretchable low melting point sheath-core composite fiber exceeds 5.0 de, there may be a problem of the product not feeling soft to the touch. In addition, if the average fiber length of the non-stretchable low melting point sheath-core composite fiber is less than 45 mm, there may be a problem of poor inter-yarn bonding, and if the average fiber length exceeds 60.0 mm, there may be a problem of the original yarns being entangled, resulting in a low thickness.

[0045] Next, the RSS monofilament constituting the web plays a role in increasing the strength, flexibility and softness of the web, and is a fiber that is not thermally adhesive under the conditions of the web manufacturing process and the down padding process using the same. Therefore, the RSS monofilament is a fiber having a melting point of 260°C or more, preferably a melting point of 260 to 300°C. As a preferred embodiment, the RSS monofilament can be a polyester fiber coated with silicone to increase the compatibility with other fibers, and as a preferred example, a PET fiber coated with a mixture of aliphatic alcohol, phosphate mixture, low molecular weight alcohol mixture silicone oil and the like on a 100% PET (polyethylene terephthalate) regular monofilament can be used as the RSS monofilament.

[0046] The RSS single fiber may have an average fineness of 2.0-3.5de, an average fiber length of 45-60mm, and a crimp number of 15-23 / inch, preferably an average fineness of 2.0-3.0de, an average fiber length of 45-58mm, and a crimp number of 17-23 / inch, and more preferably an average fineness of 2.2-2.8de, an average fiber length of 48-55mm, and a crimp number of 18-22 / inch. If the average fineness of the RSS single fiber is less than 2.0de, the raw yarn may lack strength and the raw yarns may not bond well, whereas if the average fineness of the non-stretchable RSS single fiber exceeds 3.0de, the softness of the product may decrease. If the average fiber length of the RSS single fiber is less than 45 mm, the yarns may not bond well, and if the average fiber length exceeds 60.0 mm, the yarns may become entangled, resulting in a low sense of thickness. If the number of crimps in the RSS single fiber is less than 15 per inch, the restoring force may be low, and if the number of crimps exceeds 23 per inch, the binding strength between the yarns may be low.

[0047] Next, the HCT monofilaments constituting the web impart elasticity and restoring force to the web. The HCT monofilament has a melting point of 260° C. or more, preferably 265° C. or more. In a preferred embodiment, the HCT monofilament can be a polyester fiber, more preferably a PET (polyethylene terephthalate) fiber, that satisfies the above melting point.

[0048] The HCT single fiber may have an average fineness of 2.0-3.5de and an average fiber length of 45-60mm, preferably an average fineness of 2.0-3.0de and an average fiber length of 45-58mm, and more preferably an average fineness of 2.2-2.8de and an average fiber length of 48-55mm. If the average fineness of the HCT single fiber is less than 2.0de, there may be a problem of low elasticity, and if the average fineness of the non-stretchable HCT single fiber is more than 3.0de, there may be a problem of low post-elastic restoring force. If the average fiber length of the HCT single fiber is less than 45mm, there may be a problem of low binding force, and if the average fiber length is more than 60.0mm, there may be a problem of the raw yarn being entangled, resulting in a low sense of thickness.

[0049] The town padding web of the present invention, which is made of the above-mentioned fibers, may contain 25.0 to 50.0% by weight of the mixed down, 9.0 to 18.0% by weight of the HCT monofiber, 13.0 to 21.0% by weight of the RSS monofiber, and the remaining amount of the non-stretchable low melting point sheath-core composite fiber among 100% by weight, preferably 28 to 45% by weight of the mixed down, 9.5 to 16.5% by weight of the HCT monofiber, 14.0 to 21.0% by weight of the RSS monofiber, and the remaining amount of the non-stretchable low melting point sheath-core composite fiber among 100% by weight, and more preferably 29 to 42% by weight of the mixed down, 9.8 to 16.3% by weight of the HCT monofiber, 14.0 to 20.5% by weight of the RSS monofiber, and the remaining amount of the non-stretchable low melting point sheath-core composite fiber among 100% by weight. At this time, if the mixed down content in the web is less than 25% by weight, the heat retention may be insufficient, and if it exceeds 50% by weight, the other fiber content is relatively reduced, making it unsuitable for the down padding with high elasticity and recovery to be manufactured by applying the web. If the HCT monofilament content in the web is less than 9% by weight, the elasticity and resilience of the web may be reduced, and even if it exceeds 18% by weight, there is a possibility that the elasticity will not increase any more, so it is better to use it within the above range. If the RSS monofilament content in the web is less than 13% by weight, the strength and flexibility of the web may be excessively insufficient, resulting in a decrease in marketability and processability, and if it is used in excess of 22% by weight, the strength of the web is increased, but the heat retention of the web may be relatively reduced, so it is better to use it within the above range.

[0050] The down padding web (single layer web and / or composite web) of the present invention has a basis weight of 70 to 150 g / m 2 Preferably, the basis weight is 75 to 140 g / m 2 More preferably, the basis weight is 78 to 135 g / m 2 In terms of securing physical properties such as the thin characteristics, ultra-lightweightness, and high heat retention of the down padding to which the web is applied, the above-mentioned is preferred.

[0051] The ultra-lightweight down padding with high four-way elasticity and high heat retention of the present invention is described below. As shown in the schematic diagram of FIG. 1, the down padding of the present invention includes a web layer 1 made of the down padding web described above, and sheet layers 100, 100' laminated on the upper and lower parts of the web layer and bonded to the web layer, and the web layer and the sheet layer are bonded together without cold spots to form an integrated composite sheet.

[0052] An acrylic resin layer may be included between the web layer and the sheet layer.

[0053] The sheet layer may be a multi-directional extensible fabric having a net structure woven with highly elastic polyester yarn.

[0054] The down padding of the present invention is produced through a process as shown in the schematic process diagram of FIG. More specifically, the process includes the steps of: supplying raw yarn in a bale state to a supply section; and performing bale breaking and opening processes on the raw yarn supplied to the supply section. The fiberglass can be manufactured through a process including three steps of carding the carded raw yarn; a fourth step of processing and manufacturing the carded raw yarn into a web; a fifth step of applying acrylic resin to both surfaces of the web and then carrying out a drying process; and a sixth step of surface heat treating the web to which the acrylic resin has been fixed, laminating sheets on both sides of the web, rolling it with a heating roll, and then packing it.

[0055] The down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the composition is in this range, the heat retention measured based on the ASTM D1518 method can satisfy 2.00 CLO or more, preferably 2.05 to 3.00 CLO, and more preferably 2.10 to 2.96 CLO.

[0056] In addition, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the thickness is 100 mm, the air permeability measured based on the ASTM D737 method can satisfy 100.0 CFM (Cubie feet per minute) or more, preferably 120.0 to 150.000 CFM, and more preferably 125.0 to 145.000 CFM.

[0057] In addition, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the drying ratio is 30.0% or more after 1 hour, the drying ratio measured based on the JIS L 1096 method can satisfy a drying ratio of 31.0 to 40.0%, and more preferably 31.0 to 38.5% after 1 hour.

[0058] In addition, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the above formula is used, the restoration rate can satisfy 83.0% or more, preferably 85.0 to 92.0%, and more preferably 85.0 to 90.0%.

[0059] In addition, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the residual extension after 30 seconds is measured based on the ASTM D3107 method and calculated by the following formula 2, the residual extension satisfies 6.5% or less in the longitudinal direction and 8.0% or less in the transverse direction, preferably satisfies 1.0 to 6.2% in the longitudinal direction and 3.0 to 7.0% in the transverse direction, and more preferably satisfies 1.4 to 6.0% in the longitudinal direction and 3.5 to 6.7% in the transverse direction.

[0060] When the residual elongation is measured after 30 minutes using the same method, it satisfies 5.0% or less in the longitudinal direction and 4.5% or less in the transverse direction, preferably 1.0 to 4.8% in the longitudinal direction and 1.2 to 4.5% in the transverse direction, and more preferably 1.0 to 4.5% in the longitudinal direction and 2.0 to 4.2% in the transverse direction.

[0061] In this case, the vertical direction means the warp direction of the fabric constituting the sheet layer of the down padding, and the horizontal direction means the weft direction of the fabric constituting the sheet layer of the down padding.

[0062] [Formula 2] Residual Extension (growth,%) = [{(original length + unrecovered length) - original length} / original length] x 100%

[0063] In addition, the down padding of the present invention has a basis weight of the web layer of 80 to 100 g / m 2 When the recovery rate is 30 seconds, as measured based on the ASTM D3107 method and calculated by the formula 3, the recovery rate (Recovery) after 30 seconds satisfies 70.0% or more in the longitudinal direction and 65.0% or more in the transverse direction, preferably satisfies 70.0 to 86.0% in the longitudinal direction and 65.0 to 80.0% in the transverse direction, and more preferably satisfies 65.0 to 85.0% in the longitudinal direction and 66.5 to 80.0% in the transverse direction.

[0064] When the recovery rate is measured after 30 minutes using the same method, it satisfies 75.0% or more in the longitudinal direction and 75.0% or more in the transverse direction, preferably 76.0 to 90.0% in the longitudinal direction and 76.5 to 87.5% in the transverse direction, and more preferably 77.5 to 89.0% in the longitudinal direction and 77.0 to 87.0% in the transverse direction.

[0065] In this case, the vertical direction means the warp direction of the fabric constituting the sheet layer of the down padding, and the horizontal direction means the weft direction of the fabric constituting the sheet layer of the down padding.

[0066] [Formula 3] Recovery rate (%) = [{maximum elongation length - (original length + unrecovered length)} / (maximum elongation length - original length)] × 100%

[0067] Hereinafter, the present invention will be described in more detail through examples. However, the following examples are not intended to limit the scope of the present invention, and should be construed as being intended to aid in the understanding of the present invention.

[0068] [Example] Example 1: Production of down padding

[0069] A down blend was prepared containing 20% ​​by weight veiled duck feathers and 80% by weight duck down.

[0070] A non-stretchable low melting point sheath-core composite fiber with an average fineness of 4de and an average fiber length of 51mm was prepared (manufacturer: Huvis, product name: LMF). At this time, the composite fiber is a fiber in which the sheath is made of polyethylene terephthalate resin with a melting point of 110°C and the core is made of PET resin with a melting point of 250°C, and the cross-sectional area ratio of the core and sheath is 1:1.

[0071] As the RSS (Regular Solid Siliconized Fiber) single fiber, a silicone-coated PET (Polyethylene terephthalate) fiber (manufacturer: Huvis, product name: Regular single fiber) with a melting point of 260° C. or higher was prepared. The RSS fiber had an average fineness of 2.5 de and an average fiber length of 51 mm.

[0072] As the HCT (Hollow Conjugate Stretch) single fiber, a PET fiber (manufacturer: Huvis, product name: ZENTRA) with a melting point of 260° C. or higher was prepared. The HCT fiber had an average fineness of 2.5 de and an average fiber length of 51 mm.

[0073] The mixed down, the non-stretchable low melting point sheath-core composite fiber, the RSS monofilament and the HCT monofilament were supplied as raw yarns to manufacture down padding through the process shown in the schematic process of FIG.

[0074] The raw yarn was fed to a feed section, where a bale breaking and opening process was carried out.

[0075] Next, the opened yarn was transferred to a carding machine and carded.

[0076] Next, the carded raw yarn was transferred to a web forming section and processed into a web to produce a web.

[0077] Next, the web was transferred to a drying section, where one surface of the web was spray-coated with acrylic resin (manufacturer: WOLSUNG VINA, product name: MEDIUM RESIN), followed by primary drying, and then the other surface of the web was spray-coated with acrylic resin, followed by secondary drying, to fix the acrylic resin to the top and bottom of the web. At this time, the drying temperature was 145°C to 155°C, and the two spray coatings and the primary and secondary drying were continuous processes.

[0078] Next, the web on which the acrylic resin layer was formed was transferred to a heat treatment section and subjected to surface heat treatment at 310°C to 350°C, and then transferred to a sheet supply section where a multidirectional extensible fabric (manufacturer: Chargeurs PCC, product name: #6029) with a net structure woven with highly elastic polyester yarn was laminated on both the upper and lower surfaces of the web.

[0079] Next, the sheets were compressed and integrated with a heating roll, and then packed to produce an integrated composite sheet type down padding.

[0080] The produced down padding was composed of a single layer of web and integrated sheet layers laminated and bonded to the upper and lower parts of the web, and photographs of the produced down padding are shown in Figures 3A and 3B.

[0081] The web is composed of 30% by weight of mixed down, 17% by weight of HCT monofilament, 17% by weight of RSS monofilament and 36% by weight of non-stretchable low melting point sheath-core bicomponent fiber, and has a basis weight of 100 g / m 2 It was.

[0082] Examples 2 to 6 and Comparative Examples 1 to 6

[0083] Down padding was prepared in the same manner as in Example 1, but the fiber content or basis weight in the web was varied as shown in Table 1 below to prepare down paddings for Examples 2 to 6 and Comparative Examples 1 to 6.

[0084] However, in the case of Examples 3 to 6 and Comparative Examples 1 to 6, the down padding was manufactured using a multidirectional extensible fabric constituting the sheet layers formed on both the upper and lower surfaces of the down padding web, instead of the extensible fabric of Example 1 (manufacturer: Wonyoung, product name: J30G) and the extensible fabric of Example 2 (manufacturer: Sejin, product name: 3015F), a stretchable fabric (manufacturer: Picadilly, product name: 6029).

[0085] [Table 1]

[0086] Experimental example 1: Heat retention, quick drying, breathability, feather shedding, and stability measurement

[0087] The down paddings prepared in the above examples and comparative examples were subjected to tests for evaluating the heat retention, quick-drying, breathability and feather shedding properties by Intertek Testing Services Korea Ltd. and IDFL Laboratory and Institute.

[0088] Control group 1 was made of 50% mixed down containing 20% ​​duck down feathers and 80% duck down fluff, 35% sorona fiber and 15% PET fiber, weighing 80 g / m 2 Down padding.

[0089] Control group 2 is a down blend of 85% by weight, containing 20% ​​by weight of duck down feathers and 80% by weight of duck down fluff, and 15% by weight of polyester fiber, weighing 80 g / m 2 Down padding.

[0090] Control group 3 was made of 100% polyester with a basis weight of 80 g / m 2 Down padding (product name: syncloud basic GRS).

[0091] (1) Heat retention measurement method The test method was based on ASTM D1518, and the specific test method is as follows: 1) A hood was placed over the bare plate (heating element, set to 35°C), and the chamber environment temperature was set to 20°C and humidity to 65%. 2) Once the environmental temperature and humidity and the heat exchange between the bare plates were stabilized, the thermal insulation capacity (Rct0) of the bare plates was measured. 3) The test specimen was placed on the bare plate without wrinkles or tension, and steps 1) to 2) were carried out in order. At this time, the test specimen was in the form of a mock-up or a product (sheet type padding), and its size was 550mm x 550mm. 4) Once the environmental temperature, humidity, plate, and test specimen heat exchange were stabilized, the heat retention capacity (Rct) of the test specimen was measured. 5) The result value of heat retention capacity (CLO) = (Rct-Rct0) x 6.45 can be obtained.

[0092] The heat retention of 1CLO is a unit of thermal resistance, and is 58W / m when the wind speed is 0.1m / s and the ambient temperature is 21℃. 2 It means the state of heat retention that dissipates heat and makes a person feel comfortable. 1 klo is 0.155 K·m 2 Corresponds to / W.

[0093] The heat retention measurement results are shown in Table 2 below. The higher the CLO value, a unit of heat retention, the better the heat retention.

[0094] (2) Quick drying measurement method

[0095] The test method was based on JIS L 1096:2010, and the specific test method is as follows: 1) Prepare a test specimen in mock-up form measuring 400mm x 400mm. 2) The test piece was thoroughly absorbed in distilled water at 20°C (±2°C). 3) Take it out of the water and when no more water drops are falling, attach it to your equipment. 4) The time it took for the specimens to naturally dry and return to their original weight was measured under standard conditions in a test room, the average value was expressed as an integer, and the percentage of specimens dried after one hour and the time it took for the specimens to completely dry were measured.

[0096] Breathability measurement method

[0097] The test method was based on ASTM D737, and the specific test method is as follows: 1) After conditioning, proceed with the calibration of the equipment. 2) After confirming that the reference material is measured at "0" dl, mount the test specimen on the test specimen platform without any wrinkles or folds. At this time, the test specimen used was the down padding itself, and the size was 550mm x 550mm. 3) The measured values ​​were recorded and the average value of 10 repeated tests was used as the measured value. The measurements were performed on a test area of ​​38 cm according to the American standard. 2 ) and test pressure (125pa).

[0098] (4) Measuring method for missing blades

[0099] The test method is FED STD FTMS 5530 International The test was conducted based on the Federal Standard 191-5530 (Method, Based on the Federal Standard 191-5530), and the pass was when there were less than 5 missing blades. The test conditions were: Size of Tumbling Box: 45cm x 45cm x 45cm (width, length, height), RPM (Revolution n per Minute) 48 (±2) and tumbling time (Duration of Tumbling) was set at 30 minutes.

[0100] (5) Stability measurement method

[0101] The stability was measured in the following manner. 1) Prepare a test specimen for stability. 2) After placing the test piece flat, measure the height (Hb) before the start to the nearest 1 mm. 3) Leave it in a temperature and humidity controlled room and place a 1 kg weight on it for 1 minute. 4) The weight is removed and the height (Ha) is measured after a 1 minute recovery period. 5) Calculate the restored ratio as a percentage using the following formula 1.

[0102] [Formula 1] Volume recovery rate (%) = Ha / Hb × 100%

[0103] [Table 2]

[0104] Looking closely at the physical property measurement results in Table 2, the down paddings of Examples 1 to 6 had a heat retention of 2.00 CLO or more, breathability of 100 CFM or more, and quick-drying rate of 30% or more without feather loss. In addition, it was confirmed that the down paddings of Examples 1 to 6 had an excellent recovery rate of 83.0% or more.

[0105] In contrast, in the case of Comparative Example 1, in which a small amount of HCT single fiber was used, the recovery rate was somewhat inferior when compared with Examples 2 and 3. And in the case of Comparative Example 2, in which more than 18% by weight of HCT single fiber was used, the physical properties such as heat retention, quick-drying property, and breathability were good, but the recovery rate was relatively rapidly decreased when compared with Examples 2 and 3.

[0106] In the case of Comparative Example 3, in which the mixed down content was too low at 25% by weight, other physical properties were good, but there was a problem in that the heat retention was relatively poor at less than 2.0 CLO.

[0107] In the case of Comparative Example 4, in which an excessive amount of mixed down was used and the amount of sheath-core composite fiber was relatively small, there was a problem of feather loss, which was different from the other Examples and Comparative Examples in that there was no problem of feather loss, and there was a problem of reduced quick-drying and a significant decrease in recovery rate.

[0108] The web layer has a basis weight of 65 g / m 2 In the case of Comparative Example 5, the physical properties such as heat retention, quick drying, and breathability are good, but the heat retention is insufficient at less than 2.00 CLO, and the basis weight of the web layer is 160 g / m 2 In the case of Comparative Example 6, the heat retention was very good, but the quick-drying property and breathability were relatively poor, and the recovery rate was insufficient at 80% or less.

[0109] Experimental example 2: Elasticity measurement

[0110] In terms of elasticity, a high elongation value is interpreted as an excellent product, but when considering both extensibility and recovery values, this test can be used to check whether the product maintains its durability and appearance well. In general, the smaller the residual elongation rate (or growth rate, the part that does not recover) and the higher the recovery rate, the better the performance.

[0111] The elasticity was measured according to the ASTM D3107 method. The specific measurement method is as follows. The photograph of the device used in the test is shown in FIG. 1) Six samples measuring 2.5 inches by 22 inches (horizontal and vertical) were taken with the length parallel to the stretch direction, and the same number of yarns were unraveled on both sides of the specimen to create a width of 2.00 (±0.05) inches. 2) For Stretching: Fold the end of the test piece in the longitudinal direction at about 1.25 inches, sew the part that is 1 inch with a sewing machine, and leave it spread out on a flat surface without external force for 30 minutes. 3) The test pieces were left for 4 hours under standard conditions of 21(±1)℃ and 65(±2)%RH. 4) Make a bench mark in the center of the test specimen (minimum length: 10 (±0.05) inches). 5) Place one of the ends of the sewn loop-shaped test specimen in the upper clamp and measure the length of the benchmarked portion of the test specimen to the nearest 1 mm. 6) Insert a dowel pin into the lower loop of the test specimen and apply a 4 lbs or 3 lbs weight. 7) Cycling is performed three times so that a load of 0 to 4 lbs (3 lbs) is applied to the test specimen. 8) Measure the degree of stretch after 10 seconds or 30 minutes. 9) Using the clamps of the tension meter, stretch the sample to a length H that is 85% of the calculated stretch percentage and then fix it in place. 10) After holding in tension for 30 minutes, remove the sample from the lower clamp. 11) After the load is removed, measure the benchmark for the test specimen according to each Client Time Option and record to the nearest 1 mm.

[0112] Residual extension or growth was calculated based on Equation 2, recovery was calculated by Equation 3, and stretch was calculated by Equation 4.

[0113] [Formula 2] Residual Extension (growth,%) = [{(original length + unrecovered length) - original length} / original length] x 100%

[0114] [Formula 3] Recovery rate (%) = [{maximum elongation length - (original length + unrecovered length)} / (maximum elongation length - original length)] × 100%

[0115] [Formula 4] Elongation rate (or elongation rate, %) = [{(maximum height length) - original length} / original length] x 100%

[0116] In the following Table 3, the vertical direction is the warp direction of the fabric constituting the sheet layer of the down padding, and the horizontal direction is the weft direction of the fabric constituting the sheet layer of the down padding. The physical property measurements in Table 3 are the average values ​​of the values ​​measured three times.

[0117] [Table 3]

[0118] [Table 4]

[0119] From Tables 3 and 4, it can be seen that the down padding of Examples 1 to 6 of the present invention generally have low residual elongation and high recovery rate, and thus are highly stretchable products.

[0120] In contrast, in Comparative Example 1, in which less than 9 wt % of HCT single fibers and more than 21 wt % of RSS single fibers were used, there were problems in that the residual elongation was low and the recovery rate was significantly poor.

[0121] In addition, in the case of Comparative Example 2, in which more than 18 wt % of HCT single fiber and less than 13 wt % of RSS single fiber were used, there was a problem that the residual elongation was high and the recovery rate was low compared to Example 5.

[0122] In the case of Comparative Example 3, which used a small amount of mixed down, the warmth retention was poor, and the residual elongation and recovery rate were also poor, as confirmed in the above Experimental Example 1, and this is considered to be the result of using a relatively excessive amount of sheath-core composite fiber, which is a non-elastic fiber.In contrast, in the case of Comparative Example 4, when compared with Example 6, it was confirmed that there were problems with the warmth retention being very good, but the residual elongation being somewhat high and the recovery rate being relatively poor.

[0123] In addition, the basis weight of the nonwoven fabric is 65 g / m 2 In the case of Comparative Example 5, the residual elongation rate and the recovery rate are good, but as confirmed in the above Experimental Example 1, there is a problem of poor heat retention. 2 In the case of Comparative Example 5, the residual elongation was low compared to Example 6, but the recovery rate was significantly inferior.

[0124] Through the above examples and experimental examples, it was confirmed that the down padding of the present invention has excellent heat retention even in a low weight range, and has excellent stretchability in four directions (or multiple directions). The down padding of the present invention is an ultra-lightweight functional down padding product. We were able to confirm that we could provide [Explanation of symbols]

[0125] 1: Down padding web(layer) 100, 100': Sheet layer 10: Feather 20: Fluff 30: RSS single fiber 40:HCT single fiber

Claims

1. A down padding web comprising mixed down containing at least one selected from goose down and duck down, non-stretchable low melting sheath-core bicomponent fiber, HCT (Hollow Conjugate Stretch) monofilament and RSS (Regular Solid Siliconized Fiber) monofilament.

2. The sheath of the non-stretchable low melting point sheath-core composite fiber has a melting point of 100 to 150° C., and the core has a melting point of 250° C. or higher.

2. The down padding web according to claim 1, wherein the HCT monofilaments and the RSS monofilaments have melting points of 260° C. or higher.

3. 2. The web for down padding according to claim 1, wherein the mixed down comprises 15-30% by weight of feathers and 70-85% by weight of down.

4. The non-stretchable low melting point sheath-core composite fiber has an average fineness of 3.0 to 5.0 de and an average fiber length of 45 to 60 mm; The HCT single fiber has an average fineness of 2.0 to 3.5 de, an average fiber length of 45 to 60 mm, and a crimp number of 15 to 23 per inch; 2. The web for down padding according to claim 1, wherein the RSS monofilaments have an average fineness of 2.0-3.5 de and an average fiber length of 45-60 mm.

5. The down padding web according to claim 1, characterized in that it comprises 25.0-50.0% by weight of the mixed down, 9.0-18.0% by weight of the HCT monofilament, 13.0-21.0% by weight of the RSS monofilament, and the remaining amount of the non-stretchable low melting point sheath-core bicomponent fiber out of 100% by weight.

6. Grammage: 70-150g / m ２ A web for down padding according to any one of claims 1 to 5, characterized in that it is

7. A web layer composed of the down padding web according to claim 6; and sheet layers laminated to the upper and lower portions of the web layer and bonded to the web layer; The sheet layer includes a multidirectional extensible fabric having a net structure woven with highly elastic polyester yarn, The web layer and the sheet layer are bonded together to form an integrated composite sheet without cold spots, which is an ultra-lightweight down padding having high four-way elasticity and high heat retention.

8. 8. The four-way highly stretchable and highly heat-retaining ultra-lightweight down padding according to claim 7, further comprising an acrylic resin layer between the web layer and the sheet layer.

9. The basis weight of the web layer is 80 to 100 g / m ２ When The heat retention measured based on the ASTM D1518 method is 2.00 CLO or more. The four-way highly stretchable and highly heat-retaining ultra-lightweight down padding according to claim 7, characterized in that the air permeability measured based on the ASTM D737 method satisfies 100 CFM (cubie feet per minute) or more.

10. The basis weight of the web layer is 80 to 100 g / m ２ When The drying ratio after 1 hour measured based on the JIS L 1096 method is 30.0% or more. Satisfied, 8. The ultra-lightweight down padding with high four-way stretchability and high heat retention according to claim 7, characterized in that the recovery rate satisfies 83.0% or more.

11. The basis weight of the web layer is 80 to 100 g / m ２ When Residual extension after 30 seconds measured according to ASTM D3107 method and calculated according to the following formula 2 is 6.5% or less in the machine direction and 8.0% or less in the cross direction; The ultra-lightweight down padding with high elasticity in four directions and high heat retention as claimed in claim 7, characterized in that the recovery rate after 30 seconds measured according to ASTM D3107 method and calculated according to formula 3 is 70.0% or more in the longitudinal direction and 65.0% or more in the transverse direction; [Formula 2] Residual Extension (growth,%) = [{(original length + unrecovered length) - original length} / original length] x 100% [Formula 3] Recovery rate (%)=[{maximum elongation length−(original length+unrecovered length)} / (maximum elongation length−original length)]×100%

12. A step of supplying raw yarn in a bale state to a supply section; Two steps of carrying out bale breaking and opening processes on the raw yarn supplied to the supply section; 3. Carding the opened yarn; 4 steps of converting and manufacturing the carded yarn into a web; 5. applying an acrylic resin to both surfaces of the web and then performing a drying process; and A method for producing ultra-lightweight down padding with high four-way elasticity and high heat retention, comprising the steps of: surface heat-treating a web to which an acrylic resin has been fixed, laminating sheets on both sides of the web, rolling the web with a heating roll, and packing the web.

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