JP7638754B2 - Filling structure and stuffed object using same - Google Patents

Description

The present invention relates to a filling structure and a stuffed object using the same. More specifically, the present invention relates to a filling structure that is bulky and has high shape stability, and a stuffed object using the same.

The feathers used to fill feather products such as down comforters and down jackets are generally from waterfowl. Waterfowl include geese, ducks, and eiders (wild ducks) that live on the coastlines of the Arctic Circle. There are two types of feathers: down, which is like chest hair, and feathers, both of which are used in feather products. Feathers are produced in Central Europe, such as Poland and Hungary, Northern Europe, including the Scandinavian Peninsula, and China. Feathers are bulky and warm, and occupy a position as a high-quality material for feather products such as duvets and down jackets.
However, natural feathers depend on waterfowl, and there is a limit to the supply, and the supply fluctuates depending on natural conditions and harmful diseases (such as avian viruses). From the viewpoint of nature conservation, there is also a limit to capturing wild birds. Furthermore, natural feathers can cause a foul odor if not washed properly, so it is necessary to remove the foul odor-causing filth in advance and to maintain a certain level of cleanliness and oxygen count, which indicate the degree of cleaning of the feathers. In addition, there is a basic problem that it is not easy to wash feather products such as feather duvets and feather jackets.

There have been many proposals for batting in the past. Patent Document 1 proposes shrinking polyester fibers through heat treatment to cause crimping and provide bulk and elasticity. Patent Document 2 proposes batting in which decorative yarns are wrapped around and entangled with a core yarn. In Patent Documents 3 to 5, the applicant has proposed batting in which a core yarn and decorative yarn are entangled.

Japanese Unexamined Patent Publication No. 6-93513 JP 2016-027213 A JP 2012-067429 A JP 2012-067430 A JP 2020-165025 A

However, conventional padding structures and stuffing materials have problems with heat retention, bulkiness, and durability, such as washing.

To solve the above-mentioned problems of the conventional art, the present invention provides a padding structure with high durability such as heat retention, bulkiness, and washability, and a stuffed object using the same.

The filling structure of the present invention is a filling structure including a long fiber filling, which is composed of at least two types of long fibers A and B, the long fibers A being relatively shorter than the long fibers B, and the long fibers A and the long fibers B being integrated in a state in which the fibers are entangled and/or wound around each other , and a nonwoven fabric,
The nonwoven fabric is composed of a fiber web in which hollow polyester staple fibers, crimped polyester staple fibers, and low melting point staple fibers are mixed,
The long fiber filling and the nonwoven fabric are integrated by arranging the long fiber filling in one direction on the nonwoven fabric and fixing it with sewing thread in a direction perpendicular to the longitudinal direction of the long fiber filling, or by opening a large number of slit holes in multiple rows in the nonwoven fabric, passing the long fiber filling through the slit holes, and exposing the long fiber filling alternately on the front and back surfaces of the nonwoven fabric.

The stuffed object of the present invention is formed by filling at least a part or all of the inside of a cover material consisting of a surface material and a lining material with the above-mentioned padding structure.

The present invention includes a long fiber batting and a nonwoven fabric, the nonwoven fabric being composed of a fiber web in which hollow polyester staple fibers, crimped polyester staple fibers, and low melting point staple fibers are mixed, and the long fiber batting and the nonwoven fabric are integrated, thereby making it possible to provide a batting structure and a stuffed object using the same that have high heat retention, bulkiness, and durability such as washing. In addition, the batting structure of the present invention is formed entirely of synthetic fibers, the long fiber batting and the nonwoven fabric are integrated, and since it is bulky, it has the advantage of being easy to dry even when wet with sweat, rain, water, etc., and easy to dry after washing.

FIG. 1 is a schematic perspective view of a padding structure according to one embodiment of the present invention. 2A to 2D are schematic explanatory views showing a process of integrating a nonwoven fabric and a long-fiber filling according to another embodiment of the present invention, and FIG. 2A is a schematic perspective view of a nonwoven fabric with slits formed therein. FIG. 2B is a schematic perspective view of a long fiber batting inserted into a slit in a nonwoven fabric. FIG. 2C is a schematic cross-sectional view of FIG. 2B. FIG. 2D is a schematic cross-sectional view of the unfolded nonwoven fabric. FIG. 3 is a schematic perspective view of the batting structure of the embodiment of FIG. 2D. FIG. 4 is a side view of a long fiber batting according to one embodiment of the present invention. FIG. 5 is a schematic explanatory diagram of a method for producing a long fiber filling according to one embodiment of the present invention.

In the filling structure of the present invention, the long fiber filling and the nonwoven fabric are integrated, so that the long fiber filling and the nonwoven fabric are fixed to each other, restricting their free movement, and improving heat retention, bulkiness, and durability against washing, etc. In addition, the long fiber filling is composed of at least two types of long fibers A and B, the long fiber A being relatively short compared to the long fiber B, and the long fibers A and B being integrated, and the nonwoven fabric is composed of a fiber web in which hollow polyester staple fibers, crimped polyester staple fibers, and low melting point staple fibers are mixed, so that the heat retention and bulkiness are excellent, and the crimped fibers and the long fiber filling are moderately entangled, improving washing durability.

The mass ratio of the long fiber filling and the nonwoven fabric, when the filling structure is taken as 100% by mass, is preferably 10-90% by mass for the long fiber filling and 90-10% by mass for the nonwoven fabric, more preferably 20-80% by mass for the long fiber filling and 80-20% by mass for the nonwoven fabric, even more preferably 30-70% by mass for the long fiber filling and 70-30% by mass for the nonwoven fabric, and particularly preferably 40-60% by mass for the long fiber filling and 60-40% by mass for the nonwoven fabric.

The nonwoven fabric is preferably a sheet-like nonwoven fabric, and is preferably a chemically bonded nonwoven fabric to which a binder resin is sprayed from the surface of the fiber web. This allows for a sheet-like nonwoven fabric with good dimensional stability. In addition, by reducing the amount of binder inside, it is possible to make the fabric soft to the touch. In order to maintain the internal shape, adhesive fibers, i.e., staple fibers with a lower melting point on the surface than hollow polyester staple fibers or crimped polyester staple fibers, preferably low-melting polyester staple fibers, are blended.

Of the fibers used in the nonwoven fabric, it is preferable that at least the hollow polyester staple fibers have a silicone oil applied to their surfaces. This improves the texture.

The mass per unit area (basis weight) of the nonwoven fabric is preferably 5 to 50 g/ ^m2 . This allows for a light-weight padding structure to be obtained. The mass per unit area (basis weight) of the padding structure is preferably 10 to 40 g/ ^m2 , and more preferably 15 to 30 g/ ^m2 .

The apparent thickness of the nonwoven fabric when left at rest is preferably 2 to 15 mm. This allows it to be combined with long fiber filling to form a filling structure (stuffed cotton body) of the desired thickness. Note that the apparent thickness is measured without applying any particular load.

The fineness of the fibers constituting the nonwoven fabric is preferably 0.5 to 5 decitex, and more preferably 1 to 3.3 decitex. This allows for a padding structure with high thermal insulation properties.

The nonwoven fabric is composed of a fiber web in which hollow polyester staple fibers, crimped polyester staple fibers, and low-melting polyester staple fibers are mixed. Hollow polyester staple fibers have high heat retention. The hollow ratio is preferably about 30%. By mixing this with crimped polyester staple fibers, especially visibly crimped polyester staple fibers, a bulky and soft texture can be achieved, and durability is improved by entangling with the loop fibers of the long fiber filling. In addition, by mixing low-melting polyester staple fibers, high shape stability can be maintained. The blend ratio of each fiber is preferably 30 to 50% by mass for hollow polyester staple fibers, 30 to 50% by mass for visibly crimped polyester staple fibers, and 10 to 30% by mass for low-melting polyester staple fibers, when the nonwoven fabric is taken as 100% by mass. The fiber length of each staple fiber is preferably about 38 to 60 mm. This nonwoven fabric is manufactured by blending hollow polyester staple fibers treated with silicone oil, forming a web, spraying a binder resin on it, and drying it. This type of nonwoven fabric is commercially available from Kurashiki Textile Processing Co., Ltd.

The long fiber filling of the present invention is composed of at least two types of long fibers, A and B. Although it is optional to add fibers other than long fibers A and B, when the long fiber filling is taken as 100% by mass, the total of long fibers A and B is preferably 70% by mass or more, and more preferably 80% by mass or more. Long fibers A and B are integrated. Here, "integrated" refers to a state in which the fibers are entangled or wound around each other. Long fibers A are relatively short compared to long fibers B. Bulkiness can be achieved by creating a difference in length between long fibers A and B.

In the long fiber filling of the present invention, the long fiber A may contain conductive fibers. The long fiber A is relatively short compared to the long fiber B, and is effective in preventing static electricity. It is preferable that the long fiber A contains 10% by mass or more and 100% by mass or less of conductive fibers. Specifically, it is preferable that the long fiber A contains 10% by mass or more and 100% by mass or less of conductive fibers. More preferably, it is 15% by mass or more and 50% by mass or less. If it is within the above range, the antistatic function can be exhibited. When the conductive fiber is 10% by mass or more and less than 100% by mass, the conductive fiber yarn and the normal yarn (for example, the polyester yarn used as the long fiber B described below) are aligned and integrated by a method such as intertwining or doubling. The conductive fiber includes metal fibers, carbon fibers, fibers kneaded with metal particles or carbon particles, and fibers using conductive polymers. For example, there are antistatic yarns made by KB Seiren Co., Ltd. and antistatic yarns made by Kuraray Co., Ltd. In addition, since the long fiber A is relatively short compared to the long fiber B, the amount of the conductive fiber yarn used can be reduced by adding the conductive fiber yarn to the long fiber A, and the cost can be reduced. On the other hand, if the conductive fiber yarn is added to the long fiber B, the bulkiness tends to be lower. The proportion of the conductive fiber in the long fiber filling containing the long fiber A and the long fiber B is preferably about 0.5 to 5 mass %. If it is within this range, the antistatic function can be exhibited. Furthermore, the obtained long fiber filling may be used in a bundle of about 5 to 50 fibers. In this case, it is not necessary to use conductive fiber in the long fiber A of all 5 to 50 long fiber fillings. For example, if the bundle contains 30 fibers, about 3 to 12 long fiber fillings containing conductive fiber in the long fiber A, that is, about 5 to 40% of the number of fibers in the bundle, may be used. In this case, the proportion of conductive fiber in a bundle using multiple long fiber fillings is preferably about 0.05 to 0.9 mass %.

The long fibers B can be solid yarns (ordinary yarns) such as polyester, nylon, or polypropylene, but polyethylene terephthalate (PET) hollow yarns are preferred. Polyethylene terephthalate hollow yarns are warm due to their insulating effect, and PET is stiff and can maintain high bulkiness. A hollow ratio of around 30% is preferred.

The mass per unit length of one long fiber filling is preferably 0.01 to 3 g/m, and more preferably 0.02 to 1.5 g/m. This range makes it easy to handle when processing into stuffing.

The long fibers B are preferably 1.1 to 100 times longer than the long fibers A, more preferably 2 to 100 times longer, and even more preferably 4 to 60 times longer. Within this range, the long fibers B will become loop fibers to the extent that they are longer, making the material bulkier.

It is preferable that long fibers A and long fibers B are integrated by at least one process selected from entanglement, air jet processing, wrapping, and a process in which long fibers B are sprayed onto long fibers A. Entanglement is a process using an air entanglement machine that sprays compressed air perpendicular to the running direction of long fibers A and B. Air jet processing is a so-called Taslan process in which compressed air is forced into long fibers A and B in the direction of travel. Wrapping is a process in which long fibers B are wrapped around long fibers A to integrate them. Spraying long fibers B onto long fibers A is a process in which long fibers B are sprayed onto long fibers A to entangle them.

It is preferable that a smoothing agent is fixed to the long fiber filling. This is because it improves productivity. Examples of smoothing agents include silicone resins and fluororesins. Taking silicone resin as an example, it is preferable to apply the silicone resin to the long fiber filling and then heat fix it by curing. The preferred amount of silicone resin attached is in the range of 0.1 to 10 mass% of the long fiber filling. Furthermore, acrylic resins, urethane resins, epoxy resins, etc. may be used in combination to adjust the hardness.

The single fiber fineness of long fiber A and long fiber B is preferably in the range of 0.1 to 300 decitex, and the total fineness is preferably in the range of 10 to 600 decitex. More preferably, the single fiber fineness is in the range of 1.0 to 50 decitex, and the total fineness is in the range of 20 to 250 decitex. If the fineness is in the above range, the fibers are less likely to become sagging and have a good texture.

Next, the integration of the nonwoven fabric and the long fiber filling will be described. Examples of the means for integrating the two are as follows.
(1) Long fiber batting is arranged in one direction on top of a nonwoven fabric and fixed with sewing thread in a direction perpendicular to the length direction of the long fiber batting.
(2) A large number of slits are formed in multiple rows in the nonwoven fabric, and long fiber batting is passed through the slits so that the long fiber batting is exposed alternately on the front and back surfaces of the nonwoven fabric.
The above-mentioned (2) method does not use sewing thread, so that the texture is good, and the long fiber filling and the nonwoven fabric are fixed to each other, restricting their free movement and improving heat retention, bulkiness, and durability against washing, etc. It is preferable to arrange a plurality of long fiber fillings together.

The padding structure of the present invention can be placed in a desired position in a garment. For example, it can be placed as a part in parts of the garment such as the collar, front body, back body, back of the waist, or in parts such as the shoulders, elbows, knees, buttocks, and head, and then sewn together with other parts to create a garment, making it possible to warm only the parts that are desired. Furthermore, by placing the padding structure as a part, the garment becomes one that has both the functions of ease of movement and heat retention, which is effective even in cases involving vigorous movement. Furthermore, it can also be given the function of strengthening protection for parts of the body. Applications include work, sports, and casual wear. Types of clothing include blousons, jackets, coats, pants, and overalls.

As an example of the use of the padding material, for example, by placing the padding structure in the collar of the work clothes, it fits softly around the neck, contributing to heat retention and a pleasant texture, and it becomes possible to work comfortably even when working outdoors in cold regions. Also, by placing the padding structure in the back of the work clothes, it becomes possible to work comfortably without hurting the back even when working while lying on one's back, in addition to providing heat retention. Also, by placing the padding structure in the shoulders of the work clothes, it becomes possible to not only provide heat retention, but also to prevent shoulder pain even when carrying or carrying heavy loads on the shoulders. Also, by placing the padding structure in the elbows or knees of the work clothes, it becomes possible to provide heat retention and not hurt the elbows or knees even when the body is in a position where the elbows or knees are pressed against hard ground such as asphalt. Also, by placing the padding structure in the buttocks, it is possible to add a function that not only provides heat retention, but also does not hurt the buttocks or cause discomfort even when sitting anywhere outdoors. Also, by placing the padding structure in the hood of the work clothes, it becomes possible to provide heat retention and protection from falling objects.

The following description will be given with reference to the drawings. In the following drawings, the same reference numerals indicate the same objects. Figure 1 is a schematic perspective view of a padding structure according to one embodiment of the present invention. This padding structure is integrated with a long fiber padding 23 that is passed through slit holes 24 in a nonwoven fabric 22.

Figures 2A-D are schematic explanatory diagrams showing the process of integrating a nonwoven fabric and long fiber filling according to one embodiment of the present invention, where Figure 2A is a schematic oblique view of a nonwoven fabric 22 with a slit hole 24 formed therein, Figure 2B is a schematic oblique view of a long fiber filling 23 passed through a slit hole 24 in the nonwoven fabric 22, Figure 2C is a schematic cross-sectional view of Figure 2B, and Figure 2D is a schematic cross-sectional view of the nonwoven fabric expanded.
First, as shown in FIG. 2A, the nonwoven fabric 22 is folded, and slit holes 24 are formed in a plurality of rows with a space therebetween. Next, as shown in FIG. 2B, the long fiber filling 23 is passed through the slit holes 24 of the nonwoven fabric 22. FIG. 2C is a schematic cross-sectional view of FIG. 2B. Next, the nonwoven fabric 22 is expanded as shown in FIG. 2D. This results in a filling structure 21. The filling structure may be formed by gathering a plurality of long fiber fillings on a nonwoven fabric sheet and arranging them in a large number of rows in one direction, and may be fixed, for example, by sewing thread. The long fiber filling 19 in the filling structure 21 may be arranged with a space therebetween or may be arranged densely. When the core threads are arranged with a space of preferably 3 to 9 cm, more preferably 4 to 8 cm, the filling contains a lot of air and becomes bulky. In addition, the long fiber fillings are less likely to become entangled with each other even after washing, and the bulkiness can be maintained at a high level. Typically, long fiber batting is handled as a "bundle" of about 10 to 50 threads, in which case the multiple core threads in the bundle are spaced apart approximately at their centers as described above.

Figure 3 is a schematic perspective view of the padding structure 21 of the embodiment of Figure 2D. This padding structure 21 has multiple slit holes 24 in multiple rows in nonwoven fabric 22, long fiber padding 23 is passed through the slit holes 24, and the long fiber padding 23 is exposed alternately on the front and back surfaces of the nonwoven fabric 22. This padding structure 21 has a good texture because it does not use sewing thread, and the long fiber padding 23 and nonwoven fabric 22 are fixed to each other, restricting their free movement and improving heat retention, bulkiness, and durability against washing, etc.

Figure 4 is a side view of a long fiber filling of one embodiment of the present invention. In this long fiber filling 1, the constituent fibers of the core thread 2 (long fiber A) and the filament thread 3 (long fiber B) are entangled with each other, and the filament thread 3 (long fiber B) is opened to form partially looped fibers. This long fiber filling is also called air-entangled yarn.

Figure 5 is a schematic diagram showing the manufacturing method of long fiber batting. The core yarn 4a (long fiber A) and the core yarn 15a (antistatic yarn of long fiber A) are drawn from the winding body 4, and the decorative yarn 5a (long fiber B) is drawn from the winding body 5, and are passed through two feed rollers 6, 7 and a yarn guide 8 and supplied to the air entanglement device 10. When compressed air 11 is supplied to the air entanglement device 10, the fibers in the yarn path 9 are opened and rotated, and are entangled with each other. 12 is the long fiber batting. The core yarn is supplied at a speed of 10 to 200 m/min, the decorative yarn is supplied at a speed of 20 to 10,000 m/min, the winding speed is 10 to 200 m/min, and the mixed fiber entanglement process is performed using an entanglement nozzle with an air pressure of 0.01 to 1.0 MPa. After passing through the delivery roller 13 and the winder roller 14, the yarn is wound on the winding body 16. This method has the advantage of being highly productive, as it allows for high yarn winding speeds of 20 to 1,500 m/min.

The obtained long fiber filling is imparted with a silicone resin. As the silicone resin, it is preferable to use a reactive silicone treatment agent having a hydrogen group (-OH), a vinyl group (-CH=CH ₂ ) or the like at the molecular end. For example, soft silicones such as "TERON E 530" bulky silicone, "TERON E 731" and "TERON E 722" manufactured by Matsumoto Yushi Seiyaku Co., Ltd. can be used. The amount of the silicone resin imparted is preferably 0.1 to 10% by mass based on the dry weight of the filling structure. Next, in a heat treatment step, the silicone resin is cured by heat treatment at 140 to 190°C for 1 to 10 minutes.

The present invention will be specifically described below using examples. Note that the present invention is not limited to the following examples.

Example 1
(1) Preparation of nonwoven fabric The following fibers treated with silicone oil were used.
- 40% by weight of polyethylene terephthalate (PET) hollow fiber (fineness 3.3 decitex, fiber length 51 mm, silicone oil coating),
- 40% by weight of visibly crimped PET fiber (fineness 3.3 decitex, fiber length 51 mm),
Low melting point PET fiber (fineness 3.3 decitex, fiber length 51 mm) 20% by weight
The above fibers were mixed to form a web, which was then spray-coated with an acrylic emulsion binder and dried to form a chemically bonded nonwoven fabric with a mass per unit area (basis weight) of 30 g/m ² and a thickness of approximately 6 mm.
(2) Preparation of long fiber batting As the core yarn, electrostatically conductive fiber manufactured by KB Seiren Co., Ltd., fineness 22 decitex, number of filaments 3, and PET filament yarn, fineness 41 decitex, number of filaments 18, were used, and as the filament yarn, PET hollow filament yarn (hollow rate 35%), fineness 39 decitex, number of filaments 12 were used to prepare long fiber batting. The conductive fiber in the core yarn was about 40 mass%. The proportion of conductive fiber in the entire long fiber batting was about 1.6 mass%.
Next, in the silicone resin application step, the long fiber filling was treated in a bundle of 15 pieces. As the silicone resin, an aqueous solution containing 10% by mass of "Teron E-530" (trade name, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) and 0.5% by mass of "Marpoteron E-722" (trade name, manufactured by the same company) was used, and the amount applied was 3.0 wt% based on the long fiber filling in terms of dry weight. Next, in the heat treatment step, the silicone resin was heat treated at 140 to 190°C for 1 to 13 minutes to thermally cure and fix the silicone resin. The mass of the resulting bundle of 15 long fiber fillings was 1.8 g/m.
(3) Preparation of batting structure 15 bundles of long fiber batting were arranged on the surface of the chemically bonded nonwoven fabric obtained above as shown in Figure 1. The number of bundles arranged was 15/5 cm, and the interval between the bundles of long fiber batting was 5 cm. The nonwoven fabric and the long fiber batting were then fixed by sewing. The interval between the sewing threads was 10 cm.
(4) Preparation of stuffed object The above-mentioned filling structure was filled into the outer and inner linings of a woven fabric (100% polyester) with a mass (basis weight) of 250 g/ ^m2 , and a jumper was sewn. The obtained jumper had no unevenness of the filling even after 10 washes according to JIS L0217 103 method, and had good heat retention, bulkiness, and shape stability. In addition, it was easy to dry even when wet with sweat, rain, water, etc., and was easy to dry after washing.

Example 2
A filling structure as shown in Figures 2A-D was made using the nonwoven fabric and long fiber filling of Example 1. The number of fibers arranged was 5/5 cm, and the slits were spaced 4 cm apart. The mass (basis weight) of the resulting filling structure was 72 g/ ^m2 , and the apparent thickness in a stationary state was 30 mm. A jumper was otherwise sewn in the same manner as in Example 1. The resulting jumper had no bias in the filling even after 10 washes according to the JIS L0217 103 method, and had good heat retention, bulkiness, and shape stability. In addition, it was easy to dry even when wet with sweat, rain, water, etc., and was easy to dry after washing.

The padding structure of the present invention is suitable for use as padding in clothing or comforters. The padding structure of the present invention is preferably placed in a part of clothing, for example, in parts of clothing such as the collar, front body, back body, or back of the waist, or in parts such as the shoulders, elbows, knees, buttocks, and head, and can be sewn together with other parts to create clothing, making it possible to warm only the parts that are desired to be warmed and to protect only the parts that are desired to be protected. Such a wide variety of uses include work, sports, and casual wear, and types of clothing include blousons, jackets, coats, pants, and overalls.

Reference Signs List 1 Long fiber filling 2, 4a Core yarn 3, 5a Effect yarn 4, 5, 15, 16 Wound yarn body 6, 7 Feed roller 8 Yarn guide 9 Yarn path of interlacing machine 10 Air interlacing device 11 Compressed air 12 Mixed interlacing yarn 13 Delivery roller 14 Winder roller 15a Core yarn (antistatic yarn of long fiber A)
21 Filling structure 22 Nonwoven fabric 23 Long fiber filling 20 Sewing thread 24 Slit hole

Claims (7)

A filling structure including a long fiber filling, which is composed of at least two kinds of long fibers A and B, the long fibers A being relatively short compared to the long fibers B, and the long fibers A and the long fibers B being integrated in a state in which the fibers are entangled and/or wound around each other , and a nonwoven fabric,
The nonwoven fabric is composed of a fiber web in which hollow polyester staple fibers, crimped polyester staple fibers, and low melting point staple fibers are mixed,
A filling structure characterized in that the long fiber filling and the nonwoven fabric are integrated by arranging long fiber filling in one direction on the nonwoven fabric and fixing it with sewing thread in a direction perpendicular to the longitudinal direction of the long fiber filling, or by opening a large number of slit holes in multiple rows in the nonwoven fabric, passing the long fiber filling through the slit holes, and exposing the long fiber filling alternately on the front and back surfaces of the nonwoven fabric. The padding structure according to claim 1, wherein the nonwoven fabric is a chemically bonded nonwoven fabric to which a binder resin is sprayed onto the surface of the fiber web. The padding structure according to claim 1 or 2, wherein at least the hollow polyester staple fibers have a silicone oil applied to the fiber surface. The padding structure according to any one of claims 1 to 3, wherein the mass per unit area (basis weight) of the nonwoven fabric is 5 to 50 g/ ^m2 . The padding structure according to any one of claims 1 to 4, wherein the apparent thickness of the nonwoven fabric when left at rest is 2 to 15 mm. The padding structure according to any one of claims 1 to 5, wherein the fineness of the fibers constituting the nonwoven fabric is 0.5 to 5 decitex. A stuffed object characterized in that the filling structure according to any one of claims 1 to 6 is filled into at least a part or all of a side fabric consisting of a front fabric and a back fabric.