JPH07292505A - Cup for swimming suit - Google Patents

Abstract

PURPOSE:To obtain a cup for swimming suit, excellent in heat, weather, chemical, deformation and discoloration resistances and durability by forming a silicone rubber into a bust cup shape. CONSTITUTION:This cup is produced by forming a silicone rubber 3 into a bust cup shape and making through holes 5 according to demand. As the silicone rubber, a silicone rubber prepared by curing a curable organosiloxane composition composed of (A) an organopolysiloxane represented by an average experimental formula of the formula RnSiO(4-n)/2 [R is a univalent hydrocarbon group, etc.; (n) is 1.95 to 2.05] and having >=300 average degree of polymerization, (B) microballoons, (C) an antimicrobial agent and (D) a curing catalyst is preferably used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water cup for protecting a bust when wearing a swimsuit.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
A variety of materials, shapes, and structures have been proposed and commercially available as a cup for wearing water for protecting the bust when wearing a swimsuit. For example, a bust cup shape in which a thermoplastic plastic elastomer film such as EVA is covered with a cloth, a plastic foam such as polyethylene foam, or a polyurethane foam is used. Does not have heat resistance and weather resistance, and when washed with warm water or applied to a warm air dryer, problems such as deformation and physical property deterioration occur,
When it was used for a long time in a sea bath or a pool using chlorine water, there were problems such as deformation and deterioration of physical properties.

Further, the above-mentioned materials have no antibacterial property, and have problems such as propagation of various bacteria and mold, and accompanying odor and the like. Further, there is also one using a non-woven fabric, but this one has a problem that it loses its shape in water.

The present invention has been made in view of the above circumstances and is excellent in heat resistance, weather resistance, durability and chemical resistance, and is a water-repellent cup that does not easily lose its shape or discolor, and is particularly excellent in antibacterial property. It is intended to provide a watering cup.

[0005]

According to the present invention, in order to achieve the above object, a composite in which a cloth is laminated on either or both of front and back surfaces of silicone rubber or silicone rubber is molded into a bust cup shape. Provide a bathing cup. In this case, it is preferable that silicone rubber is mixed with an antibacterial agent such as antibacterial ceramics.

The swimsuit cup of the present invention, which is made of silicone rubber, has the following effects. 1. Those containing an antibacterial agent such as an antibacterial ceramic have excellent antibacterial properties, and mold and germs do not propagate and no offensive odor occurs. 2. It has excellent heat resistance and does not lose its shape or wrinkle even when hot water is used for washing or hot air is used for drying. 3. It has excellent weather resistance and durability, and does not lose its shape, discolors or deteriorates even after being immersed in seawater, chlorinated water from a pool, or sun oil for a long time. No discoloration or deterioration of physical properties. 4. Since it has excellent elasticity and elasticity, it fits well to the human body and has a good fit. It also has excellent bust shaping. 5. Since it is physiologically inactive, it does not cause a rash even if it comes into direct contact with the human body, and is highly safe. 6. The cup can be dry-cleaned without being deformed by a solvent such as dry-cleaning. 7. A bust cup having at least one through hole has excellent breathability and can efficiently perspire sweat and water so that it does not become loose. In addition, drainage is good, and pool water and seawater do not accumulate. In addition, there are no wrinkles or other defects when worn, and it looks great.

The present invention will be described in more detail below. In the bathing cup of the present invention, a composite formed by laminating a cloth on either or both of the silicone rubber and the front and back surfaces of the silicone rubber is molded into a bust cup shape. It will be done.

In this case, various known silicone rubbers can be used, but those obtained by curing a curable organopolysiloxane composition having the following composition are particularly preferable. (A) It is represented by the following average composition formula (1) and has an average degree of polymerization of 3
00 or more organopolysiloxane R _n SiO _{(4-n) / 2} (1) (In the formula, R is an unsubstituted or substituted monovalent hydrocarbon group, and n is a positive number from 1.95 to 2.05. (B) Microballoon (C) Antibacterial agent (D) Curing catalyst

Here, the organopolysiloxane of the component (A) having an average degree of polymerization of 300 or more is represented by the following average composition formula (1) R _n SiO _{(4-n) / 2} (1) In the formula, R represents an unsubstituted or substituted monovalent hydrocarbon group, and particularly preferably has 1 to 10 carbon atoms, more preferably 1 to 8 carbon atoms. Specifically, an alkyl group such as a methyl group, an ethyl group, a propyl group, an alkenyl group such as a vinyl group and an allyl group, an aryl group such as a phenyl group and a tolyl group, and a part or all of hydrogen atoms of these groups are chlorine. Examples include an atom, a halogen atom such as a fluorine atom, a chloromethyl group substituted with a cyano group, a trifluoropropyl group, a cyanoethyl group, and the like. In this case, R of 0.001
20 mol% is preferably an alkenyl group. In general, an organopolysiloxane whose main chain is composed of a dimethylsiloxane unit or an organopolysiloxane into which a vinyl group, a phenyl group, a trifluoropropyl group or the like is introduced is preferably used. Further, n is a positive number of 1.95 to 2.05.

The average degree of polymerization of the organopolysiloxane is preferably 300 to 2,000 for the liquid type and 6,000 to 12,000 for the rubber type.

The component (B) microballoons are added for the purpose of reducing the specific gravity of the cured product.
Inorganic silica balloons, glass balloons, and shirasu balloons are preferable, and those having an average particle diameter of 1 to 500 μm and a specific gravity of 0.1 to 0.7 are preferable. Examples of such a material include Glass Bubbles manufactured by 3M Co., Ltd., Cellstar manufactured by Asahi Glass Co., Ltd., and the like. The compounding amount of the microballoon is 0 to 50 parts, preferably 1 to 50 parts, and more preferably 1 to 20 parts, relative to 100 parts (parts by weight, the same applies hereinafter) of the component (A) organopolysiloxane. If more than 50 parts is blended, the cured product becomes brittle.

Next, the antibacterial agent as the component (C) is compounded for the purpose of imparting antibacterial and antifungal properties to the cup for wearing on water. Various antibacterial agents may be used, but antibacterial ceramics are particularly preferable. Examples of the antibacterial ceramics include silver-based inorganic antibacterial agents obtained by binding silver ions to phosphate ceramics, for example, antibacterial porous beads manufactured by Shinto Kogyo Co., Ltd., and silver ions, copper ions, zinc in zeolite. Those to which ions or the like are bound, for example, Zeomic (trade name) manufactured by Sinanen Zeomic, and the like are mentioned. The amount of the component (C) blended is 0.5 to 100 parts of the component (A).
10 parts is preferable, and if it is less than 0.5 part, the antibacterial property is insufficient, and if it exceeds 10 parts, the effect does not change, which is disadvantageous in terms of cost.

The curing agent as the component (D) may be a known one generally used for curing silicone rubber, for example, di-t-butyl peroxide used for radical reaction,
Organic peroxides such as 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,4-dichlorobenzoyl peroxide and dicumyl peroxide, and silicon atoms as addition reaction curing agents. 1 bonded hydrogen atom
Examples thereof include those composed of an organohydrogenpolysiloxane containing at least two or more in a molecule and a platinum catalyst. When using an addition reaction curing agent, (A)
It is necessary that the organopolysiloxane of the component contains an alkenyl group, and when a large amount of platinum or a platinum compound is added, a vinyl group-containing organopolysiloxane such as methyl vinylcyclotetrasiloxane, It is preferable to add a reaction control agent such as allyl isocyanurate, acetylene alcohol, and a silane modified product or a siloxane modified product thereof. In the case of organic peroxide, the amount of the curing agent added is 10% by weight of organopolysiloxane.
0.1 to 5 parts by weight is preferable with respect to 0 parts by weight, and the addition reaction curing agent is an organohydrogenpolysiloxane in an amount such that SiH / alkenyl group = 0.5 to 2 with respect to the alkenyl group of the organopolysiloxane. 1-1000pp
It is preferable to use m or platinum compound of m.

The above organopolysiloxane composition includes
Reinforcing silica fillers such as silica hydrogel (hydrous silicic acid), silica aerogel (silicic acid anhydride), clay, calcium carbonate, diatomaceous earth, titanium dioxide other than the above components (A) to (D), if necessary. Such as fillers, low-molecular-weight siloxane ester, dispersants such as silanol, iron oxide, cerium oxide, heat resistance improvers such as iron octylate, inorganic pigments,
Colorants such as organic pigments, polytetrafluoroethylene particles for increasing the green strength of rubber, adhesion promoters such as silane coupling agents and titanium coupling agents may be added.

Although the cup for wearing of the present invention can be formed of only the above-mentioned silicone rubber, a composite sheet in which a cloth is laminated on either one of the front and back surfaces of the silicone rubber sheet, and preferably both, is coated with the cloth. It can be formed of a thing. In this case, as the cloth, any flat textile product such as woven cloth, knitted fabric, braid, lace, neck, felt and non-woven fabric can be used. The fibers used for the cloth are not particularly limited, but include, for example, cotton, hemp, silk, wool, rayon, cupra, acetate, triacetate, promix, vinylon, nylon, vinylidene, polyvinyl chloride, polyester. , Acrylic, polypropylene, polyurethane, benzoate,
Examples include polyclar.

As a method for molding and curing the above-mentioned curable organopolysiloxane composition into a bust cup shape, a known silicone rubber processing method can be applied.
The average degree of polymerization of the organopolysiloxane is 6,000 to 1
In the case of a commonly known millable rubber using a rubber type of 2,000, for example, a curable organopolysiloxane composition is preformed into a continuous sheet by calender molding, and then compression molded into a bust cup shape by molding. do it. At this time, by disposing the cloth above and below the sheet-like material of the curable organopolysiloxane composition, a bust cup-shaped bathing cup covered with the cloth can be obtained. Also, the average degree of polymerization of the organopolysiloxane is 30.
In the case of a commonly known liquid rubber using a liquid type of 0 to 2,000, for example, injection molding (LIMS = Liqu
id Injection Molding System
According to em), the curable organopolysiloxane composition may be molded into a bust cup shape.

The curing conditions for the above organopolysiloxane composition differ depending on the type of curing catalyst, but are usually room temperature to 200 ° C. for 5 seconds to 2 hours (molding pressure 0.1 kgf / cm).
^{2 to} 1000 kgf / cm ² ).

From the viewpoint of breathability, the water-immersive cup of the present invention can have through holes penetrating the front and back surfaces of the silicone rubber or the laminated composite of silicone rubber and cloth. In this case, the area of each through hole is preferably 0.01 to ² cm ² , and more preferably 0.03 to 0.5 cm ² , and the total area is 1 to 80% of the cup surface. , Especially preferably 5 to 30%.

Further, the swimsuit is made of an elastic cloth in order to fit the body, but the body is tightened to adjust the body shape. When a swimsuit is worn, the bust is stretched vertically and horizontally, which puts great stress on it.
To prevent the cup from being deformed by this stress, JIS-
In the L-1096 C method, the loop hardness is required to be 200 gf or more among the bending repulsion properties, and if it is less than that, the cup may be deformed, and the appearance may be poor and the bust shapeability may be poor. Also, 4000 gf
Above the range, the cup becomes too hard, and the feeling is bad and the bust feels a lot of pressure, which is not preferable. More preferably 20
It is 0 to 2000 gf. Furthermore, the loop resilience rate, which is a measure of the resilience when the cup is deformed by an external force, is preferably 30% or more, and when it is smaller than that, the resilience of the deformed part is poor and the appearance is poor and the bust shapeability is poor at the same time. There are cases.

[0020]

The cup for wearing of the present invention is excellent in heat resistance, weather resistance, durability, dry cleaning resistance, and sun oil resistance, and is excellent in fit due to the elasticity and stretchability of silicone rubber. In addition to being highly safe, the addition of antibacterial agents such as antibacterial ceramics
It has no mold or germs and has no offensive odor.

[0021]

EXAMPLES The present invention will be specifically described below by showing Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[Examples 1 to 10, Comparative Examples 1 to 3] Table 1,
The millable type curable organopolysiloxane composition having the composition shown in 2 was calendered using a calender roll to form a sheet having a thickness shown in Table 1. In this case, in Examples 4, 5, 9 and 10, the organopolysiloxane composition was sandwiched between two polyester-based tricot cloths and laminated to form a composite sheet.

Next, using the mold 1 comprising the male mold 1a and the female mold 1b shown in FIG. 1, 165 ° C., 5 minutes, 10 kgf
C cup 9 by hot pressing under the condition of / cm ²
A 0 (JIS-L-4006) bust cup-shaped water cup was molded. A cross-sectional view of the obtained cup for wearing water is shown in FIGS. In the figure, 2 is a cup for wearing water, 3 is a sheet (silicone rubber sheet) of the above organopolysiloxane composition, and 4 is a tricot cloth.

For comparison, a cup using a commercially available EVA film, a cup using polyethylene foam,
A cup made of polyurethane foam was molded.

The anti-bacterial and heat-resistant properties of the resulting water cup
The weather resistance, durability and dry cleaning resistance were evaluated by the following methods. The results are shown in Table 3. The heat resistant cup was immersed in warm water at 90 ° C. for 1 hour and then air-dried, and the deformation of the cup was evaluated according to the following criteria. ◎ No deformation ○ Almost no deformation △ Slight deformation × Severe deformation Weather resistance Evaluated according to JIS-B-7752. The results are shown in tensile strength retention rate (%). In addition, JIS-B-7752
The color change of the cup after the test was evaluated according to the following criteria. ◎ No discoloration ○ Almost no discoloration △ Slight discoloration × Yellowing Aspergillus niger I as an antibacterial test bacterium
FO4414 was used and the test was carried out according to the ASTM-G21 test method. Test piece placed on an agar plate (30 x 30m
A fixed amount of mold spore suspension was sprayed on m), cultured at a temperature of 25 ° C. and a humidity of 85% RH or higher, and the mold growth state after 1 month was observed with a stereoscopic microscope and evaluated according to the following criteria. ◎ No bacterial growth ○ Almost no bacterial growth △ Slightly bacterial growth × Durable bacterial growth Durability after immersion in seawater for 480 hours, chlorine water at 25 ° C (effective chlorine amount 20 mg / (1 liter), the durability after 5 times of 30 minutes of washing with a washing tester JIS-L-0821, and the durability after being immersed in sun oil for 96 hours, the deformation (deformation) and discoloration of the cup. Were evaluated by the same criteria as above. <Dry cleaning resistance> Test method Detergent: Bioclean (manufactured by Two M Kasei) Solvent: Brightsol (manufactured by Shell Japan) Bioclin 40 cc was put in 60 liters of Brightsol and washed for 8 minutes in a washing machine for 5 minutes It was dehydrated and then dried in a drier at 40 ° C. for 10 minutes. Evaluation type collapse: Same as for heat resistance Discoloration: Same as for weather resistance

[0026]

[Table 1]

[0027]

[Table 2] Crosslinking agent No. 1 composition 2,5-dimethyl 2,5-di (t-butylperoxy)
Hexane cross-linking agent No. 2 composition 2 wt% 2-ethylhexanol solution of chloroplatinic acid 10 parts Organohydrogenpolysiloxane * 100〃 Acetylene alcohol 1〃

[0028]

[Chemical 1] Antibacterial agents Zeomic ZAW, the sample after curing the Shinagawa Fuel Co. microballoons Sumitomo 3M Glass Bubbles physical properties of the cured product each composition for 30 minutes at 0.99 ° C. JI
It measured based on SK-6301.

[0029]

[Table 3]

[Examples 11 to 13] Liquid type curable organopolysiloxane compositions having the compositions shown in Tables 4 and 5 were used on a liquid silicone rubber injection molding machine LIM-100-52V manufactured by Yamashiro Seiki Seisakusho. And injection pressure 50
A cup for wearing was manufactured by injection molding into a bust cup shape of C cup 90 (JIS-L-4006) under the conditions of 0 kgf / cm ² and a mold temperature of 150 ° C.

The characteristics of the obtained cup were evaluated in the same manner as in the above-mentioned examples. The results are shown in Table 6.

[0032]

[Table 4]

[0033]

[Table 5]

[0034]

[Table 6]

Next, in Examples 3, 5, 10, 13 and Comparative Examples 2 and 3, the thickness of the top is 1/2 and the thickness is 2
Create a 0x50mm sheet-shaped test piece and use JIS-L
A bending resilience measurement of -1096 was performed. The results are shown in FIG. 7 and Table 7.

[0036]

[Table 7]

[Examples 14 to 16] The same compositions as in Examples 1 to 3 were extruded and then punched to form through-holes having a diameter of 1 mm, 2 mm, and 3 mm at intervals of 5 mm in length and width. Then, the cup shown in FIG. 4 was molded in the same manner as in the above example. In the figure, 5 is a through hole.

Example 17 A sheet of the same composition as in Example 1 was punched to form through holes having a diameter of 1 mm at intervals of 3 mm in length and width, and then both sides of this sheet were laminated with a polyester knit fabric. Then, the composite sheet was molded. Then, the cup shown in FIG. 5 was molded in the same manner as in the above example.

[Embodiment 18] A composite sheet similar to that of Embodiment 5 is molded, then molded into a bust cup shape by hot press molding, and further punched out to form through holes each having a diameter of 1 mm 4 in length and width.
Formed on the entire surface at intervals of mm to obtain the cup shown in FIG. Table 8 shows the thickness and weight of the cup.

[0040]

[Table 8]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a press die used for forming a water cup according to an example.

FIG. 2 is a sectional view of the wearing cup according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a wearing cup according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a wearing cup according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a wearing cup according to a fourth embodiment of the present invention.

FIG. 6 is a cross-sectional view of a wearing cup according to a fifth embodiment of the present invention.

FIG. 7 is a graph showing the bending resilience of JIS-L-1096 of Examples and Comparative Examples.

[Explanation of symbols]

 1 Mold 2 Cup for Watering 3 Silicone Rubber 4 Tricot Cloth 5 Through Hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Yoneyama 1 Hitomi, Osamu Matsuida-cho, Usui-gun, Gunma Prefecture Shin-Etsu Chemical Co., Ltd. Silicone Electronic Materials Technology Laboratory (72) Ryuichi Handa Matsuda-cho, Usui-gun, Gunma Prefecture Hitomi No.1 10 Shin-Etsu Chemical Co., Ltd. Silicone Electronic Materials Research Laboratory (72) Inventor Shogo Sudo, Suginami-ku, Tokyo 5-4-25 Miyamae Flexi Co., Ltd.

Claims (6)

[Claims] 1. A watering cup formed by molding silicone rubber into a bust cup shape. 2. A bathing cup formed by molding a composite in which a cloth is laminated on either or both of the front and back surfaces of a silicone rubber into a bust cup shape. 3. The silicone rubber or the laminated composite of silicone rubber and cloth has at least one through hole penetrating the front and back surfaces thereof, and the area of each through hole is 0.0.
The range of 1 to ² cm ² , and the total area thereof is in the range of 1 to 80% of the area of the cup surface. 4. The cup for wearing with water according to claim 1, wherein the antibacterial agent is mixed in silicone rubber. 5. The cup for wearing according to claim 4, wherein the antibacterial agent is antibacterial ceramics. 6. A silicone rubber or a laminated composite of a silicone rubber and a cloth has a bending resilience according to JIS-L-1096 and a loop hardness in the C method (loop compression method) of 200 to 4000 gf, 6. The cup for wearing according to any one of claims 1 to 5, which is made of silicone rubber having a loop repulsion rate of 30% or more at 50% compression.