JP2006089870A - Brassier cup base material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brassiere cup base material obtained in focusing attention on fiber gravity, acquaintanceship between constituent fibers and binder as a result of various consideration of reducing the weight of the cup material, improved in its lightweight, and having good touch feeling and durability in washing. <P>SOLUTION: The brassiere cup base material has the following structure: most of the constituent fibers comprise polypropylene fibers; spaces between the constituent fibers are fixed with binder containing styrene-based elastomer; such a structure as to mix a plasticizer with the binder at a mixing ratio of 1:0.5 to 10 is favorable; and the plasticizer preferably comprises paraffinic oil. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a base material for a brassiere cup (hereinafter sometimes simply referred to as a cup material) used for a cup portion of a foundation for a woman such as a brassiere, a slip, or a body suit.

  In recent years, various foundations for women have been developed to look better. For example, in the case of a brassiere, the cup material tends to be thick (hereinafter referred to as thickening) in order to make the cup portion thick. However, an increasing number of women complain of symptoms such as stiff shoulders and sluggishness due to the weight of the brassiere, the burden on the shoulders and chest where the strap is worn. Therefore, development of a thicker and lighter cup material is required in the foundation industry.

Conventionally, polyurethane foam, double raschel, and polyester fiber nonwoven fabric are used for the cup material.
JP 2000-27005 A JP 2000-160459 A JP, 10-298804, A The polyurethane foam cup material had a problem that it became heavy not only in terms of air permeability and light resistance, but also increased in thickness. In addition, the double raschel cup material is excellent in air permeability but has a problem that it cannot be thickened.

  Furthermore, the polyester fiber non-woven cup material is excellent in durability and washing durability, but if it is thickened, the material used increases and it is difficult to further reduce the weight.

  As a result of various investigations regarding the weight reduction of the cup material, the present invention has been achieved by paying attention to the specific gravity of the fibers and the familiarity between the constituent fibers and the binder. It is an object to provide a cup material having washing durability.

  The cup material of the present invention is formed by constituting most of the constituent fibers with polypropylene fibers and fixing the constituent fibers with a binder containing a styrene-based elastomer.

  According to this means, since the polypropylene fibers of the constituent fibers and the styrene-based elastomer of the binder are both olefinic, the conformability is good and the fibers are fixed with a small amount of binder. In addition, the specific gravity of the polypropylene fiber is as low as 0.91, and the increase in weight is suppressed even if the used fiber is increased for thickening, compared to the polyester fiber having a specific gravity of 1.38.

  In this invention, the structure which mixed the plasticizer with the mixing ratio 1: 0.5-10 in the binder is suitable. The reason is that when the plasticizer is less than 0.5, it becomes hard and lacks rebound and softness, resulting in poor tactile sensation. When the plasticizer exceeds 10, the plasticizer oozes out and the binder becomes brittle, making it durable for washing. This is because the property tends to be impaired, and a more preferable range is 1: 1 to 5.

  As the plasticizer, paraffinic oil is preferable in consideration of compatibility with styrene-based elastomer and light resistance.

  The base material for brassiere cups of the present invention can be reduced in weight, has excellent rebound resilience and soft touch, and has the advantages of excellent light resistance and washing durability.

  As a constituent fiber of the nonwoven fabric constituting the cup material, 100% polypropylene fiber is optimal in view of weight reduction and binder adhesiveness. Considering only weight reduction, the majority of the polypropylene fibers (at least 75% or more) should be used, and polyethylene fibers with a specific gravity of 0.94 to 0.96 or PP-PE composite fibers should be used for the other fibers. Is also possible.

  Styrenic elastomers include styrene-poly (ethylene-butylene) -styrene; SEBS, styrene-poly (ethylene-propylene) -styrene; SEPS, styrene-ethylene-ethylene-propylene-styrene; SEEPS, styrene-ethylene-propylene; A diblock or triblock block copolymer composed of a styrene block such as SEP and an elastomer block having an olefin structure can be used. Among these, considering light resistance and elastomer characteristics, it is preferable to use triblock copolymers SEBS, SEPS, and SEEPS.

  As the plasticizer for the styrene-based elastomer, an aroma-based oil or a naphthenic-based oil can also be used, but paraffin-based oil is optimal in view of compatibility with the styrene-based elastomer and light resistance.

  There are no particular restrictions on the processing method of the solution, which is a mixture of binder styrene elastomer and plasticizer paraffin oil, to spraying, padding, foam coating, impregnation, etc. In consideration of bulkiness, the spray method is preferable.

A card web having a basis weight of 70 g / m ² was produced using polypropylene fiber 7.7 dtex × 76 mm 100%, and a fiber web in which the fibers were entangled by a needle punch machine was produced. Next, a mixed solution in which SEBS dissolved in xylene and paraffinic oil are mixed at a weight ratio of 50:50 (1: 1) is adjusted to a solid content concentration of 20%. After spray processing so that the solid content of SEBS and paraffinic oil is 40 g / m ² , a drying treatment is performed at 120 to 140 ° C. for 5 minutes to produce a cup material having a basis weight of 110 g / m ² and a thickness of 5.5 mm. did.

(Comparative Example 1)
Using the acrylic ester emulsion solution as a binder on the fiber web of the example, adjusting the solid content concentration to 20%, and spraying so that the solid content amount of the acrylic ester emulsion is 60 g / m ² , A cup material having a basis weight of 130 g / m ² and a thickness of 5.5 mm was produced by drying.

(Comparative Example 2)
A card web having a basis weight of 100 g / m ² was prepared using polyester fiber 6.6 dtex × 51 mm 100%, and a fiber web in which the fibers were entangled with a needle punch machine was prepared. Then, the fiber web was spray-processed so that the solid content of SEBS and paraffinic oil was 40 g / m ² in the same manner as in the example, and then subjected to a drying process to have a basis weight of 140 g / m ² and a thickness of 5 A 5 mm cup material was produced.

(Comparative Example 3)
A card web having a basis weight of 100 g / m ² was produced using polyester fiber 6.6 dtex × 51 mm 100%, and a fiber web in which the fibers were entangled by a needle punch machine was produced. Next, this fiber web is spray-processed so that the solid content of the acrylate emulsion is 60 g / m ² , and then dried to produce a cup material having a basis weight of 160 g / m ² and a thickness of 5.5 mm. did.

  Next, using the examples and comparative products 1, 2 and 3 which are test pieces (width 10 cm × length 10 cm) of the cup material of Examples and Comparative Examples 1, 2 and 3, washing durability, In order to evaluate rebound resilience and tactile sensation, the following tests were conducted.

  A. Laundry test: Test method according to symbols in the attached table of JIS-L-0217 “Indicates and Handling Methods for Textile Products” (1) Washing method (washing) The test method specified in No. 103 was repeated 10 times. Then, the dimensional change rate and tensile strength retention before and after the test were calculated.

  B. Rebound resilience test: A glass plate (10 × 10 cm, 50 gf) is placed on top of 10 test pieces, the height of 10 pieces is measured from four sides, and the average thickness (a) per piece is calculated. To do. Next, a weight (1950 gf) is placed on the glass plate so that the total weight becomes 2000 gf, and after 30 seconds, the height of 10 sheets from the four sides is measured, and the average thickness per sheet ( b) is calculated. Thereafter, the weight (1950 gf) is removed and the sample is left for 30 seconds, the height of 10 sheets is measured from the four sides, and the average thickness (c) per sheet is calculated. And compression rate (%) and compression elastic recovery rate (%) were computed from Numerical formula 1 and Numerical formula 2, respectively.

Ａ、Ｂの各試験後の結果を表１に示す。

The results after each test of A and B are shown in Table 1.

表１から明らかなように、本発明に係る実施例品は、比較例品１、２、３に比較して、寸法変化率、引張強度保持率、厚み保持率が向上し、洗濯耐久性に優れ、しかも従来品である比較例品３と比べて重量で約３０％軽量化することが判明した。

As is apparent from Table 1, the example product according to the present invention has an improved dimensional change rate, tensile strength retention rate, and thickness retention rate as compared with comparative example products 1, 2, and 3, and has improved washing durability. It was found that the weight was reduced by about 30% in comparison with the comparative product 3 which is an excellent product.

  In addition, compared to Comparative Examples 1, 2, and 3, the Example product has a soft texture because of its high compression rate, and also has a high rebound from the high compression elastic recovery rate. It could be confirmed.

Claims (3)

  A base material for a brassiere cup, wherein most of the constituent fibers are made of polypropylene fibers and the constituent fibers are fixed with a binder made of a styrene elastomer.   The base material for brassiere cups of Claim 1 which mixed the plasticizer with the mixing ratio 1: 0.5-10 in the binder.   The base material for brassiere cups according to claim 2, wherein the plasticizer is a paraffinic oil.