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Abstract

SOLUTION: A brassiere includes: a pair of right and left bust parts for covering busts; a pair of bag-like right and left storage parts provided above the bust parts; and cushions stored in each storage part. The cushion is polyurethane foam whose main components are toluene diisocyanate and polyether polyol. A glass transition temperature corresponding to a peak value of loss tangent is 0°C or more and 40°C or less, loss tangent in a frequency region of 0.1 Hz or more and 100 Hz or less is 0.4 or more, and an average value of loss tangent in a frequency range of 0.1 Hz or more and 1 Hz or less is less than or equal to the average value of loss tangent in the frequency range of 10 Hz or more and 100 Hz or less at temperatures above 0°C and below 40°C.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a brassiere. [Background technology]

[0002] Brassieres that aim to make not only the bust but also the décolleté look beautiful are known (for example, Patent Document 1). [Prior art document] [Patent documents] [Patent Document 1] JP 2014-196583 A Summary of the Invention

[0003] In a first aspect of the present invention, a brassiere is provided, comprising a pair of left and right bust sections covering the bust, a pair of left and right bag-shaped storage sections provided above the bust sections, and a cushion stored in each of the storage sections, the cushion being formed from polyurethane foam, the polyurethane foam being primarily composed of toluene diisocyanate and polyether polyol, and having a glass transition temperature, which is the temperature corresponding to the peak value of the loss tangent, of 0°C or higher and 40°C or lower, and at a temperature of 0°C or higher and 40°C or lower, the loss tangent in the frequency range of 0.1 Hz to 100 Hz is 0.4 or higher, and the average value of the loss tangent in the frequency range of 0.1 Hz to 1 Hz is less than or equal to the average value of the loss tangent in the frequency range of 10 Hz to 100 Hz.

[0004] The above summary of the invention does not list all of the features of the present invention. In addition, subcombinations of these features may also be inventions. [Brief description of the drawings]

[0005] [Figure 1] FIG. 1 is a front view of a brassiere 10 according to the present embodiment. [Diagram 2] FIG. 2 is a rear view of the brassiere 10. [Diagram 3] 1 is a view of the left side of the front main body portion 100 as seen from the back side, that is, the side closest to the wearer. [Figure 4]For the sake of explanation, FIG. 3 shows a state in which the flaps 114 and 124 have been removed. [Diagram 5] FIG. 1 is a view of the cushion 190 as seen from the wearer's side when worn. [Figure 6] FIG. 1 is a view of the pad 180 as seen from the wearer's side when worn. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0006] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0007] Fig. 1 is a front view of a brassiere 10 according to this embodiment, and Fig. 2 is a rear view of the brassiere 10. The brassiere 10 is formed integrally with a front body part 100 and a rear body part 160. The upper parts of the front body part 100 and the rear body part 160 are further connected on the left and right sides by a pair of shoulder straps 170. Unless otherwise specified, the left and right refer to the left and right of the wearer wearing the brassiere 10.

[0008] An opening / closing section 140 is disposed in the center of the front body section 100, crossing from top to bottom. The opening / closing section 140 allows the wearer to put on and take off the brassiere 10 by separating or joining the front body section 100 into left and right halves. The opening / closing section 140 includes, for example, a zipper or a hook-and-loop fastener. Furthermore, the opening / closing section 140 may have a flap provided on the side farther from the wearer than the zipper, etc., so that the zipper, etc., is hidden when viewed from the direction of FIG. 1.

[0009] The main body front portion 100 is further provided with a pair of left and right bust portions 110 that roughly correspond to the position of the wearer's bust, a front chest upper portion 120 disposed above each of the bust portions 110, and a lace portion 130 disposed above each of the front chest upper portions 120. Below, the left configuration of the pair of left and right configurations will be explained, and unless otherwise specified, the right configuration will be omitted as it is symmetrical to the left configuration.

[0010] The bust section 110 is a section that covers the bust of the wearer. On the other hand, the upper front chest section 120 is a section that covers the part of the wearer that is above the bust and extends to below the collarbone, which is called the chest, décolleté, etc.

[0011] The front main body portion 100 and the rear main body portion 160 are preferably integrally formed from knitted fabric made from natural fibers such as organic cotton or silk, excluding the opening and closing portion 140. However, the material is not limited to organic, and artificial fibers may be used instead of natural fibers. Furthermore, the front main body portion 100 and the rear main body portion 160 may be formed from woven fabric instead of knitted fabric, or each portion may be formed separately and then sewn or woven together to form an integral structure.

[0012] Fig. 3 is a view of the left side of the front body portion 100 as seen from the back side, that is, the side closest to the wearer. Fig. 4 shows a state in which flaps 114, 124 have been removed from Fig. 3 for the sake of explanation.

[0013] As shown in Fig. 4, the bust section 110 is bag-shaped and has an opening 112 at the upper side of the side, thereby forming a storage section. In addition, as shown in Fig. 3, it has a flap 114 that covers the opening 112. The upper side edge of the flap 114 is attached to the main body front section 100, and the lower side is open.

[0014] 6 is a view of the pad 180 as seen from the wearer's side when worn. The pad 180 is inserted into and removed from the storage section through the opening 112 in the bust section 110. The pad 180 is, for example, approximately bowl-shaped. The pad 180 is positioned in front of the bust when worn, making the bust look fuller and protecting the bust. It is preferable that the bottom edge of the pad 180 is shaped to follow the bottom edge of the bust section 110. This allows the position of the pad 180 stored in the bust section 110 to be stable when worn.

[0015] As shown in Fig. 4, the front chest upper part 120 is bag-shaped and has an opening 122 at the top, which forms a storage area. Furthermore, as shown in Fig. 3, it has a flap 124 that covers the opening 122. The upper side of the flap 124 is attached to the main body front part 100, and the lower side is open.

[0016] 5 is a view of the cushion 190 as seen from the wearer's side when worn. The cushion 190 is inserted into and removed from the storage section through the opening 122 in the upper front chest area 120. The cushion 190 is positioned in front of the décolleté when worn. This allows the wearer, who has had the chest including the bust and décolleté removed for treatment of an illness, to have the décolleté area that was removed together with the bust to have a thicker appearance, making the line up to the bust look natural.

[0017] Cushion 190 is, for example, plate-shaped. The thickness of cushion 190 may be determined according to the wearer's décolletage, and is several millimeters to several centimeters. It is preferable that cushion 190 is thinner than pad 180 so that the entire chest looks natural when worn. Furthermore, in a wearer who has only had one side of the chest removed, cushion 190 with a thickness about half the thickness of cushion 190 on the side where the chest has been removed may be inserted on the side where the chest has not been removed to balance the appearance.

[0018] The lower edge of the cushion 190 is preferably shaped to follow the lower edge of the front chest portion 120. This stabilizes the position of the cushion 190 housed in the front chest portion 120 when worn. It is also preferable that the lower edge of the cushion 190 and the upper edge of the bust portion 110 have shapes that match each other. On the left side of this embodiment, the lower edge of the cushion 190 is made up of a horizontal line extending from left to right and a line segment extending downward from the horizontal line toward the center, and the upper edge of the bust portion 110 is also made up of a horizontal line extending from left to right and a line segment extending downward from the horizontal line toward the center, so that they are shaped to match each other. This stabilizes the position of the cushion 190 when worn.

[0019] The cushion 190 is preferably made of a material that provides a comfortable fit around the chest, and is made of, for example, polyurethane foam. Polyurethane foam has a shape-following property that reduces its hardness by heat transfer from the human body and can be deformed to follow the shape of the body surface, so that it fits well to the human body when at rest and has excellent wearability and retention when exercising.

[0020] For example, the polyurethane foam is primarily composed of toluene diisocyanate and polyether polyol, and has a glass transition temperature, which is the temperature corresponding to the peak value of the loss tangent, of 0°C or higher and 40°C or lower. At temperatures of 0°C or higher and 40°C or lower, the loss tangent in the frequency range of 0.1 Hz to 100 Hz is preferably 0.4 or higher, and the average value of the loss tangent in the frequency range of 0.1 Hz to 1 Hz (the frequency of the surface of the human body at rest) is preferably less than or equal to the average value of the loss tangent in the frequency range of 10 Hz to 100 Hz (the frequency of the surface of the human body during exercise). Furthermore, in the above polyurethane foam, it is more preferable that the toluene diisocyanate is a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate in a ratio of 65:35 to 80:20, and the polyether polyol is a polyoxypropylene triol having a number average molecular weight of 700 or more and 3000 or less, a polyoxypropylene diol having a number average molecular weight of 400 or more and 2000 or less, or a mixture of polyoxypropylene triol and polyoxypropylene diol.

[0021] In the polyurethane foam, the rate of change in the average value of the loss tangent in the frequency range of 10 Hz to 100 Hz relative to the average value of the loss tangent in the frequency range of 0.1 Hz to 1 Hz is preferably 0% to 10%. In addition, in the polyurethane foam, the polyether polyol and the toluene diisocyanate are preferably blended in a ratio of 100:39.21 to 100:48.77 (mass ratio).

[0022] By using such polyurethane foam, body heat is transferred to the cushion 190, reducing the hardness of the cushion 190 and making it soft, thereby improving the fit and comfort around the wearer's chest.

[0023] The polyurethane foam may also be used for the pad 180. Alternatively, other materials may be used for the pad 180.

[0024] (Example) A sensory test was conducted by having a wearer wear the brassiere 10 according to the above embodiment. In Example 1, the cushion 190 was made of "SMP Foam" manufactured by SMP Technologies Co., Ltd. This "SMP Foam" is an example of the polyurethane foam of the above embodiment. In Comparative Example 1, the cushion 190 was made of "Polyurethane Foam Soft Type" manufactured by Ins Corporation Co., Ltd. This "Polyurethane Foam Soft Type" is a polyurethane foam, but does not satisfy the properties of the polyurethane foam of the above embodiment. In Comparative Example 2, the cushion 190 was made of nylon cloth.

[0025] The wearers were 10 patients in their 40s to 60s who had undergone breast removal for breast cancer, with a variety of bust sizes. They put on the brassieres 10 by inserting and removing the cushions 190 in the order of Example 1, Comparative Example 1, and Comparative Example 2 into the upper front chest 120 on the side where the breast had been removed. They were asked to evaluate the fit of each bra on a three-point scale, with the categories of "fit," "comfort," and "silhouette." The results are shown in Table 1.

[0026] [Table 1]

[0027] As shown in Table 1, in terms of "fit," "comfort," and "silhouette," Example 1 was significantly better than Comparative Examples 1 and 2. In addition, the following comments were also made. Compared to Comparative Examples 1 and 2, Example 1 provides a sense of security by filling in the gaps and fitting properly. The foam in Comparative Example 1 is harder than that in Example 1 and does not fit well with the skin. In Comparative Example 1, the three women who answered "yes" to the question "does it fit?" all had smaller bust sizes than the other seven women, and they didn't notice much unevenness. Regarding Comparative Example 2, there were comments such as it was stiff and unstable, it felt too strong against the skin, and the silhouette was poor.

[0028] According to the first embodiment, the brassiere 10 that makes the décolleté and bust look fuller and more natural can improve the fit and comfort of the wearer's chest. In particular, it can improve the comfort of use for a wearer who has had a breast surgically removed for medical reasons.

[0029] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the description of the claims that such modifications and improvements can also be included in the technical scope of the present invention.

[0030] It should be noted that the order of execution of each process, such as operations, procedures, steps, and stages, in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not specifically stated as "before," "prior to," etc., and may be realized in any order unless the output of a previous process is used in a later process. Even if the operational flow in the claims, specifications, and drawings is explained using "first," "next," etc. for convenience, it does not mean that it is essential to perform the process in this order. [Explanation of symbols]

[0031] 10 brassiere, 100 main body front part, 110 bust part, 112 opening, 114 flap, 120 front upper chest part, 122 opening, 124 flap, 130 lace part, 140 opening and closing part, 160 main body rear part, 170 shoulder part, 180 pad, 190 cushion

Claims

1. A bra, A pair of left and right bust parts that cover the bust, A pair of left and right bag-shaped storage sections are provided above the pair of left and right bust sections and cover the chest area above the bust; A cushion accommodated in each of the accommodation portions; Equipped with The cushion is formed of polyurethane foam; The polyurethane foam is The main components are toluene diisocyanate and polyether polyol. The glass transition temperature, which is the temperature corresponding to the peak value of the loss tangent, is 0° C. or more and 40° C. or less; At a temperature of 0° C. or more and 40° C. or less, the loss tangent in a frequency range of 0.1 Hz or more and 100 Hz or less is 0.4 or more, The average value of the loss tangent in a frequency range of 0.1 Hz to 1 Hz is equal to or less than the average value of the loss tangent in a frequency range of 10 Hz to 100 Hz. bra.

2. The brassiere according to claim 1 , wherein the cushion is removable from the receiving portion.

3. The brassiere of claim 1, wherein the cushion is plate-shaped.

4. 2. The brassiere according to claim 1, wherein the lower side of the cushion and the upper side of the corresponding one of the pair of left and right bust portions have shapes that match each other.

5. 2. The brassiere according to claim 1, wherein each of the pair of left and right bust sections is bag-shaped and contains a pad.

6. 6. The brassiere of claim 5, wherein the cushion is thinner than the pad.

7. 6. The brassiere of claim 5, wherein said padding is formed from said polyurethane foam.

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