JP6656461B1 - Feather-containing heat retaining sheet and method for producing feather-containing heat retaining sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feather-containing heat retaining sheet which is lightweight and not bulky, has high warmth of feathers, has high hygroscopicity and exothermic properties, and is excellent in heat retaining property, and a manufacturing method thereof. SOLUTION: A first batting layer made of a batting formed of chemical fiber cotton in a sheet shape, a second batting layer made of a batting formed of the chemical fiber cotton in a sheet shape, and the first batting layer. Feather-containing heat insulating material having a mixed fiber layer made of a mixed fiber containing feather fibers, polyester composite fibers and cupra fibers between the batting layer and the second batting layer, the whole being integrated by heat fusion Sheet. [Selection diagram] Fig. 1

Description

  The present invention provides a feather-containing heat retaining sheet that is thin, lightweight, non-bulky, and has hygroscopicity and heat generation properties, and a method for producing the feather-containing heat retaining sheet.

BACKGROUND OF THE INVENTION For clothing and bedding that require heat retention, down (feathers) and feathers (feathers) of birds such as ducks and geese are widely used. Feathers are lightweight, have high heat retention and are highly permeable to moisture, and clothing and futons packed with feathers are very warm.
In general, feather products such as clothing and bedding using feathers are filled with feathers between side fabrics, and the swelling of the feathers makes the feathers bulky and forms an air layer, thereby improving heat insulation.

  On the other hand, such a feature of the feather product has a problem that when the feather is wet due to rain, sweat, or the like, the bulk cannot be maintained and the heat retaining property is reduced. Especially in the case of clothing such as down jackets, they are worn as cold weather clothing when going out, so they are not often wet by rain or snow, and they are hard to dry. I can't.

  Another problem with down products is that they are difficult to wash. If a feather product is washed in a home washing machine using a commercially available detergent, the feather will be damaged or crushed by friction or pressure, and the bulk cannot be maintained.

In response to such a problem of feather products, feather products, particularly clothing, have become widespread using synthetic fiber cotton instead of natural fiber feathers.
Chemical fibers are fibers made by chemical synthesis or processing, and the fibers processed into cotton are synthetic fiber cotton (synthetic cotton).
Synthetic fiber cotton is lightweight, resistant to wetting, easy to maintain bulk, and quick-drying, so that it does not decrease in heat retention even when wet, and is easy to use as a filling material for winter clothing.
Many techniques have been disclosed in relation to synthetic fiber cotton. For example, Japanese Patent Application Laid-Open No. 2012-67429 discloses that "a stuffing object in which a side ground is filled with stuffing, wherein the stuffing is made of a yarn. A long-fiber wad integrated with a core yarn, wherein the flower yarn is opened to form a loop-shaped fiber; a large number of the long-fiber wad are aligned in at least one direction; Which is sewn together with the base material and is integrated with the side ground ”(Patent Document 1).

  This is a batting made of filaments, which are obtained by integrating flower yarns made of chemical fibers such as conjugate fibers composed of two or more polymers having different melting points with a core yarn, and are bulky and excellent in washing resistance. If it is formed into a fiber-filled cotton sheet, it can be easily filled between the side fabrics of clothing or bedding.

As the polyester fiber contracted by heat treatment, for example, Japanese Patent Application Laid-Open No. 06-93513 discloses "a fiber made of polyester and having an initial tensile resistance (IS) of 35 g / d or more and a dryness. The relation with the elastic limit elongation (Δε)% including the elongation of the crimp after free heat treatment at 200 ° C. for 5 minutes satisfies IS ≧ (Δε + 0.6) −2.8 × 10 ³ +10, and the three-dimensional winding A crimped fiber having a degree of crimp (Ci) of 15% or more and a number of crimps (CN) of 10 / inch or more. " It is said that this crimped fiber can be used as a bulky and elastic cushion material.

JP 2012-67429 A JP-A-06-93513

If the above-mentioned synthetic fiber cotton is used as a filling material to be packed between the side fabrics of clothing and bedding, it is resistant to wetness such as rain and snow, quick-drying, and more stable and cheaper than feathers Can be provided.
However, unlike the feathers that take in air, synthetic fiber cotton does not have delicate softness or flexibility, and has a problem that it has poor hygroscopicity, heat retention, and heat generation.
Also, when used for the purpose of packing between side fabrics, synthetic fiber cotton has been developed to have a certain bulkiness, has elasticity, and cannot be folded as small as feathers.
Further, if the thickness is increased to obtain a certain bulkiness, the weight increases. Therefore, when using synthetic fiber cotton for clothing, it becomes bulky and bulky when worn, it is heavy and hard to move, and it takes a lot of space during storage other than winter or after taking it off, and more when transporting for distribution. There is a problem that it is difficult to handle because it occupies the place.

  Therefore, as a result of intensive research, the present inventor has solved the problems of both the feather product using various feathers and the product using synthetic fiber cotton, while being lightweight and not bulky, having the warmth of feathers. Provided are a feather-containing heat retaining sheet having high moisture absorption, high heat generation, and excellent heat retention, and a method for producing the same.

The inventor has solved the above problem by the following means.
<1> A first batting layer composed of a batting formed of a sheet of chemical fiber cotton, a second batting layer composed of a batting formed of the chemical fiber cotton of a sheet, and the first batting A mixed fiber layer made of a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber between the layer and the second batting layer, the whole being integrated by heat fusion. Feather-containing heat retaining sheet.

<2> The feather-containing heat retaining sheet according to <1>, wherein the basis weight of the first and second batting layers is 20 to 200 g / m ² .
<3> The feather-containing heat retaining sheet according to <1>, wherein the basis weight of the mixed fiber layer is 10 to 200 g / m ² .
<4> The feather-containing heat retaining sheet according to <1>, wherein the content of the feather fiber in the mixed fiber layer is 1 to 70% by weight based on the total weight of the mixed fiber layer.
<5> The feather-containing heat retaining sheet according to <1>, wherein the content of the polyester composite fiber in the mixed fiber layer is 1 to 90% by weight based on the total weight of the mixed fiber layer. .
<6> The feather-containing heat retaining sheet according to <1>, wherein the content of the cupra fiber in the mixed fiber layer is 1 to 90% by weight based on the total weight of the mixed fiber layer.
<7> The feather-containing heat retaining sheet according to any one of <1> to <6>, wherein the entire thickness of the feather-containing heat retaining sheet is 2 to 20 mm.

<8> Clothing comprising the feather-containing heat retaining sheet according to <1> to <7>, which is filled or interposed in a side cloth as a batting and used as at least a part thereof.
<9> A bedding product wherein the feather-containing heat retaining sheet according to <1> to <7> is filled or interposed in a side cloth as batting and used as at least a part thereof.

<10> A first batting layer composed of a batting formed of a sheet of chemical fiber cotton, a second batting layer composed of a batting of the chemical fiber cotton formed of a sheet, and the first batting A feather-containing heat retaining sheet having a mixed fiber layer made of a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber between the layer and the second batting layer, the whole being integrated by heat fusion The method of manufacturing
(1) a step of arranging chemical fiber cotton in a sheet on a base and arranging a first batting layer;
(2) placing a mixed fiber obtained by mixing feather fiber, polyester composite fiber, and cupra fiber on the first batting layer, and forming a mixed fiber layer;
(3) a step of placing a second batting layer composed of a batting formed by forming a synthetic fiber cotton into a sheet on the mixed fiber layer;
(4) a step in which a laminate in which the first batting layer, the mixed fiber layer, and the second batting layer are sequentially laminated is heat-pressed and integrated by heat fusion;
A method for producing a feather-containing heat retaining sheet, comprising:

According to the present invention, the following effects are exhibited.
The feather-containing heat retaining sheet according to the present invention is a first batting layer composed of a batting formed of a synthetic fiber cotton in a sheet shape, and a second batting layer composed of a batting formed of the chemical fiber cotton in a sheet shape. And a mixed fiber layer comprising a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber between the first and second batting layers, the whole being integrally formed by heat fusion. As a result, the feather fibers in the mixed fiber layer are fixed to other fibers, so that the feather fibers are not blown out or biased, and the feather fibers exhibit heat insulation of the feathers, and are lightweight and warm.

Furthermore, since the feather-containing heat retaining sheet according to the present invention has a structure in which the mixed fiber layer is covered with the batting layer of chemical fiber cotton, the sheet is resistant to moisture and moisture, and is suitable as a filling material for clothing and bedding. is there.
Also, since it is integrated into an extremely thin sheet, processing is easy. Although it contains feather fibers, it does not require downpacking or downproofing, so it has good ventilation and excellent comfort.

  Further, the feather-containing heat insulating sheet according to the present invention is obtained by laminating a first batting layer, a mixed fiber layer, and a second batting layer in this order and bonding them by heat fusion to be integrated. Since it is composed of about 2 to 20 mm, it can be treated as a single piece of fabric, easy to use as batting for clothing and bedding, can be cut and sewed as it is, manufacturing work is easy, special processing and feather separately There is no need for stuffing work or the like, and feathers are not scattered at the time of cutting or sewing, so that a good working environment can be maintained.

And, with a thickness of about 2 to 20 mm, the feather-containing heat retaining sheet is not bulky, can be folded compactly, and is easy to transport and store in distribution.
Further, by integrating the respective layers by heat welding, the layers have elasticity both in the vertical direction and in the horizontal direction, and when used for clothing, not only high heat retention, but also easy to wear and easy to move.
And, since the mixed fiber layer contains cupra fibers, it is possible to provide more comfortable clothing and bedding which is lighter, less bulky and warmer with improved hygroscopicity and heat generation.

Further, the production of the feather-containing heat retaining sheet according to the present invention,
(1) a step of arranging a synthetic fiber cotton in a sheet shape on a base and arranging a first batting layer; and (2) a feather fiber, a polyester composite fiber and a cupra fiber on the first batting layer. And (3) placing a second batting layer composed of a batting formed of synthetic fiber cotton in a sheet shape on the mixed fibrous layer. (4) A laminated body in which the first batting layer, the mixed fiber layer, and the second batting layer are sequentially laminated, and are heat-pressed and integrated by heat fusion, and contain feather fibers. However, feathers do not scatter during production, and the production is easy without special sewing or processing such as down-proofing and quilting.
When the first batting layer and the second batting layer are made of polyester cotton, the three polyester layers of the first batting layer, the mixed fiber layer, and the second batting layer are melted by heating and adhere to each other. Therefore, there is no need to separately apply an adhesive, and the number of working steps is small, so that manufacturing is easy.

FIG. 1 is a sectional view for explaining a feather-containing heat retaining sheet according to the present invention. FIG. 2 is a schematic explanatory view of a method for producing a feather-containing heat retaining sheet according to the present invention.

  An embodiment for carrying out the feather-containing heat retaining sheet and the method for producing the feather-containing heat retaining sheet according to the present invention will be described with reference to the drawings of the examples.

  FIG. 1 is a sectional view for explaining a feather-containing heat retaining sheet according to the present invention. FIG. It is sectional drawing which shows the state of. FIG. 2 is a schematic explanatory view of a method for producing a feather-containing heat retaining sheet according to the present invention. Is a mixed fiber layer, 31 is a feather fiber, 32 is a polyester composite fiber, and 33 is a cupra fiber.

In the embodiment of the embodiment of the feather-containing heat retaining sheet shown in FIG. 1, the feather-containing heat retaining sheet 1 has a first batting layer 2a composed of a batting formed of synthetic fiber cotton in a sheet shape, and It has a second batting layer 2b and a mixed fiber layer 3 composed of a batting formed in a sheet shape, the mixed fiber layer 3 on the upper surface of the first batting layer 2a, and the second batting layer 2b on the upper surface. They are laminated to form a laminate (FIG. 1B). Then, the entire laminate is integrated by pressure and heat fusion to form one feather-containing heat retaining sheet 1 (FIG. 1A).
The mixed fiber layer 3 disposed between the first batting layer 2a and the second batting layer 2b is a mixture of feather fiber (31), polyester composite fiber (32), and cupra fiber (33). Consists of mixed fibers.

  In this embodiment, the first batting layer 2a and the second batting layer 2b are made of batting in which synthetic fiber cotton is formed into a sheet. Chemical fiber cotton is cotton (cotton) manufactured from chemical fiber, and examples of the chemical fiber of the chemical fiber cotton include regenerated fiber, semi-synthetic fiber, synthetic fiber, and inorganic fiber. In particular, synthetic fibers such as polyester, nylon, and polypropylene are suitable, and composite fibers of a plurality of materials may be used. In this embodiment, a batting made of polyester cotton formed into a sheet is used.

In the present embodiment, the first batting layer 2a and the second batting layer 2b have a basis weight (weight per square meter) of 20 to 200 g / m ² , and the entire feather-containing heat retaining sheet 1 is used depending on the intended use. when the thinner lightweight, first batting layer 2a with a thin cotton so basis weight is 20 to 40 g / m ² approximately, the second batting layer 2b. Conversely, in order to make the whole feather-containing heat retaining sheet 1 thick and heavy to enhance the heat retaining property, the basis weight is set to about 150 to 200 g / m ² , and the first batting layer 2a, 2 constitutes the batting layer 2b.
If the basis weight of the first batting layer 2a or the first batting layer 2b is 20 g / m ² or less, satisfactory heat retention cannot be expected because the basis weight is too thin, and if the basis weight is 200 g / m ² or more, the batting becomes too thick and heavy. In particular, there is a problem that it is difficult to move when used for clothing.
The first and second batting layers 2a and 2b may be made of the same material, for example, batting of polyester or batting made of different materials. Also, the basis weight of the first and second batting layers 2a and 2b may be the same, or one may be lighter and the other heavier.

The feather-containing heat retaining sheet 1 according to the present invention has a mixed fiber layer 3 between the first batting layer 2a and the second batting layer 2b.
The mixed fiber layer 3 is composed of a mixed fiber obtained by mixing feather fiber (31), polyester composite fiber (32) and cupra fiber (33).

The feather fibers (31) are composed of feathers. Here, “feathers” is a general term including both down (feathers) and feathers (feathers) of birds such as ducks and geese. Therefore, as the feather fiber (31), only down, only feather may be used, or down and feather may be mixed. Natural feathers are preferred because they are lightweight, warm, and soft in texture, but the configuration of the present invention may use artificial feathers or artificial feathers made of synthetic fibers called artificial feather cotton.
By mixing the feather fiber (31) with the mixed fiber layer 3, the feather-containing heat retaining sheet 1 according to the present invention has a high heat retaining property, a high air permeability, and a soft texture.

The polyester composite fiber (32) to be mixed with the mixed fiber layer 3 is a fiber in which two or more kinds of polymers having different properties are composited with a base. In this embodiment, PET (polyethylene terephthalate) and PTT (polytrimethylene terephthalate) are used. Polyester-based composite fibers obtained by compounding the above two types of polymer components are used. In addition, it is also possible to substitute acetate-based or acrylic-based conjugate fibers, but the lightweight, quick-drying, heat-resistant, and durable properties of PET and the high elasticity and shape stability of PTT properties and softness Polyester composite fibers that combine feel and feel are preferred. Further, since the polyester composite fiber is thermoplastic, it exerts an adhesive effect by hot pressing, and thus firmly adheres to the feather fiber (31) and the cupra fiber (33).
Composite fibers in which two or more polymers having different properties are combined do not cause excessive elasticity as in the case of 100% polyester, and the shrinkage rates of a plurality of polymers are different from each other. Since crimps are developed and elasticity is generated, the feather-containing heat retaining sheet 1 according to the present invention exerts an effect of providing high elasticity.

The cupra fiber (33) to be mixed with the mixed fiber layer 3 is a regenerated fiber obtained by dissolving cotton linter, which is a short fiber of natural cotton, in a chemical and processing it into a fiber, and is a fiber containing cellulose as a main component.
The cupra fiber (33) has a high wet strength, which is the strength when wet with water, and by mixing the cupra fiber (33) into the mixed fiber layer 3, the feather has the property of being excellent in water absorption and hygroscopicity. It is given to the contained heat retaining sheet 1.

  The content of the feather fiber (31) in the mixed fiber layer 3 is preferably from 1 to 70% by weight based on the total weight of the mixed fiber layer. Such a feather-containing heat retaining sheet 1 provides moderate warmth and softness.

  Further, the content of the polyester composite fiber (32) in the mixed fiber layer is preferably 1 to 90% by weight based on the total weight of the mixed fiber layer 3, and particularly preferably 20 to 50% by weight. Thus, the feather-containing heat retaining sheet 1 having quick drying properties, heat resistance, and durability is obtained.

  Furthermore, the content of the cupra fiber (33) in the mixed fiber layer is preferably 1 to 90% by weight based on the total weight of the mixed fiber layer 3, and particularly preferably 20 to 40% by weight. Water and moisture absorption.

  In the mixed fiber layer 3, the amount of fibers to be mixed is appropriately adjusted according to the intended use of the feather-containing heat retaining sheet 1 provided with the mixed fiber layer 3, and the content is adjusted and mixed. The feather-containing heat insulating sheet 1 suitable for the intended use can be provided.

The feather-containing heat retaining sheet 1 according to the present invention has an overall thickness α of 2 to 20 mm, and is configured as if it were a single piece of cloth. This is because if it is too thin, it is not possible to secure heat retention, and if it is more than 20 mm, it becomes too thick and bulky, loses its lightness and makes it difficult to perform cutting, sewing, and other manufacturing operations.
Therefore, more preferably, the mixing ratio of each fiber of the first batting layer, the second batting layer, and the mixed fiber layer is adjusted so that the thickness α of the feather-containing heat retaining sheet 1 is about 2 to 6 mm. Then, it is preferable because it is lightweight and not bulky, can be handled like a single piece of cloth, can be easily filled or interposed in clothing or bedding as batting, and cutting, sewing, and other manufacturing operations can be easily performed.

The feather-containing heat retaining sheet 1 according to the present invention is configured as a single piece of cloth as described above and can be handled as a material for heat retention, so that jackets, pants, skirts, shirts, and winter It can be used as a batting for manufacturing any warming product such as clothing such as inners and hats, bedding such as comforters and mattresses.
In addition, the feather-containing heat retaining sheet 1 according to the present invention can be used by filling or interposing a part of various kinds of clothing and bedding. For example, if the feather-containing heat insulating sheet 1 is interposed only in the front body and the back body of the jacket, and the sleeves are made of an existing thin fabric, the clothing can be manufactured with high design.
Similarly, the bedding product may be filled with the feather-containing heat retaining sheet 1 according to the present invention in a part of the side cloth or interposed therebetween to obtain a bedding product having a high heat retaining property.

Since the feather-containing heat retaining sheet 1 according to the present invention is a sheet body completed as a heat retaining material, it can be filled and interposed regardless of the type of the side cloth, even when used for clothing or bedding. As the side cloth, cloth of any material such as natural fiber such as cotton, wool and hemp, regenerated fiber such as rayon, synthetic fiber such as polyester, nylon and acrylic fiber, and natural or synthetic leather can be used.
Further, since it has a moderate elasticity and a high wet strength, it can be used as a cushion material for bags and the like.

Next, a method for producing a feather-containing heat retaining sheet according to the present invention will be described with reference to FIG.
As an example of the method for producing the feather-containing heat retaining sheet 1 according to the present invention,
(1) a step of arranging chemical fiber cotton in a sheet shape on a base and arranging a first batting layer 2a;
(2) a step of forming a mixed fiber layer 3 by placing a mixed fiber obtained by mixing feather fiber 31, polyester composite fiber 32, and cupra fiber 33 on the first batting layer 2a;
(3) a step of placing a second batting layer 2b composed of a batting in which chemical fiber cotton is formed into a sheet on the mixed fiber layer 3;
(4) a step in which a laminate in which the first batting layer 2a, the mixed fiber layer 3, and the second batting layer 2b are sequentially laminated is heat-pressed and integrated by heat fusion;
Consists of

In FIG. 2, the first batting layer 2a is set on a base (not shown) such that the side on which the mixed fiber layer 3 is laminated faces upward ((a) first step). The basis weight of the first batting layer 2a is 20 to 200 g / m ² , and is adjusted in consideration of the intended use.
Next, the mixed fiber is placed on the upper surface of the first batting layer 2a to laminate the mixed fiber layer 3 ((b) second step).
The mixed fiber of the mixed fiber layer 3 is a mixture of the feather fiber 31, the polyester composite fiber 32, and the cupra fiber 33. The content is such that the feather fiber 31 is 1 to the total weight of the mixed fiber layer. 70% by weight, 1 to 90% by weight of polyester composite fiber 32, 1 to 90% by weight of cupra fiber 33, preferably 10 to 30% by weight of feather fiber 31, 20 to 50% by weight of polyester composite fiber 32 And the cupra fiber 33 is 20 to 40% by weight.
The fibers of the mixed fiber layer 3 may be mixed at a preset ratio and supplied to the upper surface of the first batting layer 2a. The mixed fiber layer 3 may be formed by jetting the fibers and mixing them on the upper surface of the first batting layer 2a. In addition, it is preferable that the mixed fiber layer 3 has a net shape from the viewpoint of being able to be arranged in a well-balanced manner.

Then, in the second step, the second batting layer 2b is placed on the laminated mixed fiber layer 3 ((c) third step). The basis weight of the second batting layer 2b is also 20 to 200 g / m ² , and the amount is adjusted in consideration of the intended use. Note that the basis weight of the second batting layer 2b is not limited to the same basis weight as the first batting layer 2a.

Then, the laminated body in which the first batting layer 2a, the mixed fiber layer 3, and the second batting layer 2b are sequentially laminated is heat-pressed and integrated by heat fusion ((d) fourth step).
In the feather-containing heat retaining sheet 1 according to the present embodiment, polyester cotton is used for the first filling layer 2a and the second filling layer 2b, and the polyester composite fiber is mixed in the mixed fiber of the mixed fiber layer 3. . Therefore, when a laminated body in which the first batting layer 2a, the mixed fiber layer 3, and the second batting layer 2b are sequentially laminated is heated to a high temperature, the polyester resins constituting the respective layers are melted and mixed with each other to bond. I do. At that time, the feather fibers mixed in the mixed fiber layer 3 are fixed by the melted polyester resin. The polyester resin melted by heating is entirely heat-sealed and united by pressurization by a compression means, and the laminate is configured as if it were a single layer. The feather-containing heat retaining sheet 1 according to the present invention is adjusted to a thickness of 2 to 20 mm by pressing.
When thermoplastic chemical fibers are not used for the first filling layer 2a and the second filling layer 2b, an adhesive or the like is applied between each filling layer and the mixed fiber layer 3 to ensure the heat. It may be configured to be welded.
Thereafter, the sheet is dried to obtain the feather-containing heat retaining sheet 1 according to the present invention. The work efficiency of the heating, pressurizing, drying and the like can be improved by using a hot press machine or the like.

  The production of the feather-containing heat retaining sheet 1 of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the invention.

  The feather-containing heat retaining sheet according to the present invention is a first batting layer composed of a batting formed of a synthetic fiber cotton in a sheet shape, and a second batting layer composed of a batting formed of the chemical fiber cotton in a sheet shape. And a mixed fiber layer made of a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber between the first filling layer and the second filling layer, and the whole is united by heat fusion. The upper part of shirts, pants, skirts, inners, hats, gloves, and boots, as well as duvets and down jackets, as well as thin, lightweight, non-bulky, moisture-absorbing, and heat-generating materials It can be used for cloth products generally requiring heat retention, such as bags, futons, blankets, sheets, and kotatsu.

DESCRIPTION OF SYMBOLS 1 Feather-containing heat insulating sheet 2a First batting layer 2b Second batting layer 3 Mixed fiber layer 31 Feather fiber 32 Polyester composite fiber 33 Cupra fiber α Thickness of feather-containing heat insulating sheet

Claims (10)

A first batting layer composed of a batting formed of a synthetic fiber cotton sheet, a second batting layer composed of a batting formed of the chemical fiber cotton sheet, and the first batting layer and An article of clothing having a mixed fiber layer made of a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber between the second batting layers, wherein the whole is integrated by heat fusion. Or a feather-containing heat retaining sheet for filling or interposing in bedding .   The feather-containing heat retaining sheet according to claim 1, wherein the basis weight of the first and second batting layers is 20 to 200 g / m2.   The feather-containing heat retaining sheet according to claim 1, wherein the basis weight of the mixed fiber layer is 10 to 200 g / m2.   The feather-containing heat retaining sheet according to claim 1, wherein the content of the feather fiber in the mixed fiber layer is 1 to 70% by weight based on the total weight of the mixed fiber layer.   The feather-containing heat retaining sheet according to claim 1, wherein the content of the polyester composite fiber in the mixed fiber layer is 1 to 90% by weight based on the total weight of the mixed fiber layer.   The feather-containing heat retaining sheet according to claim 1, wherein the content of the cupra fiber in the mixed fiber layer is 1 to 90% by weight based on the total weight of the mixed fiber layer.   The feather-containing heat retaining sheet according to any one of claims 1 to 6, wherein the entire thickness of the feather-containing heat retaining sheet is 2 to 20 mm. An article of clothing, characterized in that the feather-containing heat retaining sheet according to any one of claims 1 to 7 is filled or interposed in a side cloth as a batting, and is used at least in part. 8. A bedding product, wherein the feather-containing heat retaining sheet according to any one of claims 1 to 7 is filled or interposed in a side cloth as a batting and used for at least a part thereof. A first batting layer composed of a batting formed of a synthetic fiber cotton sheet, a second batting layer composed of a batting formed of the chemical fiber cotton sheet, and the first batting layer and Between the second batting layer, a mixed fiber layer made of a mixed fiber containing feather fiber, polyester composite fiber, and cupra fiber, and the whole is integrated by heat fusion , and is filled into clothing or bedding. A method for producing a feather-containing heat retaining sheet for interposing ,
(1) a step of arranging chemical fiber cotton in a sheet on a base and arranging a first batting layer;
(2) placing a mixed fiber obtained by mixing feather fiber, polyester composite fiber, and cupra fiber on the first batting layer, and forming a mixed fiber layer;
(3) a step of placing a second batting layer composed of a batting formed by forming a synthetic fiber cotton into a sheet on the mixed fiber layer;
(4) The laminated body in which the first batting layer, the mixed fiber layer and the second batting layer are sequentially laminated is heat-pressed and integrated by heat fusion to form an overall thickness of 2 to 20 mm. Process
A method for producing a feather-containing heat retaining sheet, comprising: