JPH0134006Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Technical field] This invention relates to a kotatsu futon with excellent heat retention. [Background Art] The structure of the futon that has been proposed in the past is one in which urethane, fiber, and side fabric are integrally quilted. It was easy to escape, and the heat retention was not good. However, if quilting is omitted in order to reduce cold points, the batting and side fabric will become separated, making it difficult to handle, and the batting will break, making it impractical for practical use. In particular, kotatsu futons are used under harsh conditions, so in the end, they must be quilted as much as possible in order to become a product. [Disclosure of the invention] In order to solve these problems, this invention uses sufficient quilting to withstand practical use, while significantly improving heat retention than conventional products and reducing the electricity consumption of electric kotatsu. The company provides a kotatsu futon that has succeeded in reducing the amount of water, and its gist is that it is a kotatsu futon that is made of polyester fiber filling, foamed polyurethane filling, and fabric, and the filling is placed on the side that comes in contact with the fabric. Placed fineness 6
A polyester fiber layer of ~10d and a polyester fiber layer with a fineness of 3d or less placed inside are combined, the density of the filling is 0.01 to 0.08g/cc, and at least the surface of the filling that will become the front side of the futon is It is covered with fabric, and the filling and fabric are held together by quilting, and the foamed polyurethane filling has the back side of the futon glued to the fabric over almost the entire surface, or The layer is partially locked, and the layer consisting of the filling and fabric and the layer consisting of the filling and fabric are overlapped with each other with an air layer between them. It's on the kotatsu futon. This is below,
explain in detail. The kotatsu futon according to this invention has a layer containing batting and a layer containing filling, which are polymerized and have an air layer between them. The polyester fibers constituting the filling of one layer are excellent in both durability and heat retention, and are therefore more suitable for the purpose of the present invention than other synthetic fibers and natural fibers. Note that natural fibers are not preferred in terms of heat retention because they adsorb water with high thermal conductivity. Hollow fibers contain air, which has poor thermal conductivity, and are bulky, which further improves heat retention. The thinner the single fiber is, the greater the fiber surface area, which prevents air convection and increases the number of fine air layers between fiber layers, further improving heat retention. However, if the fineness is too fine, the batting will come out from the grains of the fabric, so-called "cotton shedding", and it will be difficult to handle when processing the futon, which is undesirable. From this point of view, two layers of thick polyester fibers with a thickness of 6 to 10 d and a fine polyester fiber layer with a fineness of 3 d or less are used as filling.
The layers are combined, and the layer in contact with the fabric is a thick layer to prevent cotton from coming off and improve futon processability, and the inner layer is a fine layer to increase heat retention. Place. Regarding the density of the fibers that make up the batting, from the point of view of heat retention, it is desirable to use a batting with a low fiber density that contains a large amount of air that has poor thermal conductivity and reduces the amount of fibers that have 10 times the heat conductivity. If there is too much air, convection will occur and heat retention will deteriorate. On the other hand, high-density materials with a large number of fibers have high conductivity and poor heat retention, as described above. For this reason, the fiber density range is 0.01 to 0.08g/cc.
It can be said that it is necessary to do so. One or both sides of the batting must be covered with fabric. One side is the surface of the kotatsu futon, and the other side is the part that comes into contact with the filling. The fabric serving as the surface layer may be any non-woven fabric, woven fabric, knitted fabric, etc., but a woolly fabric is preferable from the viewpoint of heat retention.
According to measurements using an ASTM type heat retention measuring device, hairy products have approximately 1.3 times the heat retention ability compared to those with a plain surface. In addition, in terms of cotton shedding, haired products exhibit good prevention effects even when using fine-grained batting. Even if there is no fabric on the side of the batting that comes into contact with the batting, there is no big difference in terms of practicality and heat retention, so it is better to not use it from a cost standpoint. This is good because it increases efficiency. The more layers of quilting consisting of batting and fabric, the better in terms of durability. In particular, kotatsu futons are required to be more resistant to washing than other types of futons, so the filling and fabric must be processed to become one piece. A major feature of this device is that there is no significant difference in heat retention even though the layers consisting of batting and fabric are heavily quilted. The filling material constituting the other layer is required to have the necessary performance to provide the resilience against bending required for a kotatsu futon. In other words, it needs to be firm and strong, not sloppy and weak. Urethane foam in the form of a sheet is satisfactory in this respect. The fabric and the filling material are processed as one piece, but in order to simplify processing, the urethane foam is preferably bonded to the fabric on the entire surface, or may be quilted. The batting layer and the filling layer are both polymerized to form a kotatsu futon, but it is necessary to fix the two together for use. A good method is to apply tape-like cloth to the four sides and sew. Quilting in the center is not a good idea, but if it is unavoidable for wear, try to do as little quilting as possible. This invention will be explained in more detail based on drawings showing a conventional example and an embodiment. FIG. 1 is a cross-sectional view of a conventionally proposed kotatsu futon. Filling 3 composed of fibers
is covered with a front side fabric 1 and a back side fabric 6 together with an inner material 4 such as foamed urethane, each of which is quilted 2 so as to be integrated, and furthermore, a tape-like fabric 5 is applied to the peripheral edge and sewn together. In this structure, quilt stitch 2 becomes a cold point and heat transfer becomes large. FIG. 2 is a sectional view showing an example of this device. The batting 8 is wrapped with a fabric 7 and quilted 9 to form an integral piece. On the other hand, the middle material 10
is bonded to the fabric 11 and is integrated.
The batting layer and the filling layer are sewn 12 at the peripheral edges to which the tape-like fabric 12 is applied, thereby making them polymerized and integrated. By doing this, a space 13 is created between the batting layer and the filling layer, which retains an air layer and eliminates cold points, improving heat retention. (Example) As the filling, 800g/piece of polyester fiber 3D x 51mm hollow cross-section product was used. One side of this is used as a fabric, 180 strands of 100% plain weave / 25mm.
(Vertical + horizontal) Covered with product, size 15cm x 15cm
Some quilting was done. As the filling material, a 10 mm urethane foam product laminated with a raised nylon knit product was used. Examples were prepared by polymerizing both of these so that the fabric surface was on the outside, and sewing the peripheral edge using a tape-like material made of raised nylon knit. On the other hand, as the surface fabric, 180 100% plain weave noodles/
25mm, polyester fiber 12d x 76mm as filling
A conventional product with the structure shown in Figure 2 was created by using 800g/sheet of urethane foam and 10mm of foamed urethane, and a raised nylon knit material as the lining fabric, and quilting them into a 15cm x 15cm piece. It was created. In order to compare the power consumption of both electric kotatsu,
A kotatsu futon to be used in this comparative experiment was also created. At this time, the side material is 100% momen, 200/25
mm plain weave, filling is polyester 7D x 70mm, fabric weight 1.8
Kg/sheet was used for each piece, and these were subjected to general quilting processing. In order to measure the heat retention ability of the invented and conventional kotatsu futons, we used an ASTM heat retention measuring device to investigate the amount of heat consumed to maintain the temperature of the hot plate at 50℃.
The outside temperature is 20℃ x 65%RH. The results are shown in Table 1. The numerical value was expressed as the reciprocal of the amount of heat consumed (thermal flow resistance value 1/K). The height of this number

[Effect of idea]

The kotatsu futon according to this invention has the above-mentioned structure, so even if the number of quiltings in the batting part is increased, the eyes of the quilting, or cold points, that occur in the batting part can be avoided by placing them on the back side of the batting. It can be covered with a filling made of polyurethane foam. Since the filling is a sheet of foamed polyurethane rather than a fiber or cotton, there is no need for much quilting and therefore no cold points.
Therefore, we made a lot of quilting on the batting part,
Even if the handleability and durability are improved, the heat retention properties of the futon as a whole will not decrease, and a kotatsu futon with extremely high practical value can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a kotatsu futon that has been proposed in the past, and FIG. 2 is a sectional view showing an example of a kotatsu futon according to this invention. 7... Outer fabric, 8... Filling fiber, 9... Quilt stitch, 10... Inner material, 11... Back fabric, 12... Tape fabric, 13... Space.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A kotatsu futon made of polyester fiber filling, foamed polyurethane filling, and fabric, where the filling is polyester with a fineness of 6 to 10 d arranged on the surface in contact with the fabric. A fiber layer and a polyester fiber layer with a fineness of 3D or less arranged inside it are combined, and the density of the filling is 0.01~
0.08g/cc, at least the surface of the filling that will become the front side of the futon is covered with fabric, the filling and fabric are held together by quilting, and the foamed polyurethane filling is on the back side of the futon. The surface that becomes the fabric is glued to the fabric over almost the entire surface, or is partially locked,
A kotatsu futon, characterized in that the layer consisting of the filling and fabric and the layer consisting of the filling and fabric are stacked on top of each other with an air layer between them. (2) The kotatsu futon according to claim 1 of the utility model registration claim, the filling of which is mainly made of hollow polyester fibers.