EP2597983A1 - Bretelle de soutien gorge auto-ajustable - Google Patents

Bretelle de soutien gorge auto-ajustable

Info

Publication number
EP2597983A1
EP2597983A1 EP11755433.7A EP11755433A EP2597983A1 EP 2597983 A1 EP2597983 A1 EP 2597983A1 EP 11755433 A EP11755433 A EP 11755433A EP 2597983 A1 EP2597983 A1 EP 2597983A1
Authority
EP
European Patent Office
Prior art keywords
strap
yarn
ibf
load
inches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11755433.7A
Other languages
German (de)
English (en)
Inventor
Krishan Weerawansa
Nalantha De Alwis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stretchline Intellectual Properties Ltd Virgin Islands
Original Assignee
Stretchline Intellectual Properties Ltd Virgin Islands
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stretchline Intellectual Properties Ltd Virgin Islands filed Critical Stretchline Intellectual Properties Ltd Virgin Islands
Publication of EP2597983A1 publication Critical patent/EP2597983A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41C—CORSETS; BRASSIERES
    • A41C3/00—Brassieres
    • A41C3/0028—Brassieres with size and configuration adjustment means
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
    • A41B9/00—Undergarments
    • A41B9/16—Shoulder-straps forming part of the undergarments
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41C—CORSETS; BRASSIERES
    • A41C3/00—Brassieres
    • A41C3/12—Component parts
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41F—GARMENT FASTENINGS; SUSPENDERS
    • A41F15/00—Shoulder or like straps
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41F—GARMENT FASTENINGS; SUSPENDERS
    • A41F15/00—Shoulder or like straps
    • A41F15/005—Tapes for shoulder straps
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41F—GARMENT FASTENINGS; SUSPENDERS
    • A41F9/00—Belts, girdles, or waistbands for trousers or skirts

Definitions

  • the present invention relates to straps, and more particularly, to straps for use in brassieres, sports bras, swimwear, and the like.
  • bras, and bra straps it is not practical for bras, and bra straps, to be specially designed for each wearer. Instead, a given bra style may be intended to be worn by women of varying heights. For example, the distance from the top of a bra cup to the top of the shoulder of a wearer may vary substantially requiring bra straps to be shorter or longer for different wearers. Because straps cannot be made shorter, certain wearers obtain no or little support. In other cases, the straps must be stretched to fit a wearer; however, conventional bra straps are made of an elastic having a high modulus. Thus, as the elastic is stretched, the force applied by the strap rapidly increases and the bra becomes uncomfortable to the wearer.
  • the bra strap it is frequently necessary for a woman to vary the length of the bra strap so that the bra will provide support and properly fit her and additionally the strap will impart a force that is comfortable to her.
  • a relatively short woman may need to decrease the length of the bra straps so that the bra provides adequate support.
  • a relatively tall woman may need to increase the length of the bra straps so that the bra does not impart an excessive, uncomfortable force.
  • bra straps incorporate a ring and slide system so that the length of a bra strap may be changed by the wearer prior to or during use to account for the physical dimensions of the wearer.
  • the ring and slide system suffers from the following disadvantages.
  • the ring and slide system creates a thick bulky area near the slider which is uncomfortable to the wearer and visible through outer garments.
  • the slider may move during use so as to loosen the strap, causing discomfort, a lack of support, and a loose fit.
  • the ring and slide system adds to the cost of the bra.
  • a bra may be provided that has straps comprising a very weak elastic.
  • a bra has been manufactured by Warnaco.
  • the straps on this bra provide very little support. Instead, the support is provided by the underhand and wing construction. In this way, the bra functions similarly to a strapless bra even though straps are provided.
  • such a bra fails to provide adequate support during normal use. Additionally, the straps of this bra are prone to slide off the shoulder of the wearer.
  • a strap to be incorporated into a bra so that the bra may be used by women of different physical dimensions, including heights, without the need to adjust the length of the strap and that provides comfort and support to the wearer.
  • the present invention is directed to a strap that substantially obviates one or more of the problems due to limitations and disadvantages of the related art for use in women's clothing including brassieres, sports bras, swimwear and the like.
  • a strap is made of a material having stretch properties such that the strap applies a load sufficient to provide support but not in excess to that which is comfortable to a wearer over a wide range of elongation of the strap, which is sometimes referred to as having a flat power curve.
  • such a strap may include an elastomeric yarn.
  • the elastomeric yarn may be covered.
  • the draft under which the elastomeric yarn is stretched while being covered and the frequency with which the core yarn is covered, measured in turns of covering yarn per unit length of the core yarn are controlled so as to yield a strap with desirable stretch properties.
  • the invention provides straps of varying widths and styles and is useful for articles of clothing beyond bra straps including leg, head, wrist and waist bands and belts.
  • a strap having a flat power curve for use as clothing such as brassieres, sports bras, and swimwear is provided whereby the strap stretches no more than 25% when subjected to a minimal load of 0.6 lbf and stretches at least 60% when subjected to a higher load of 2.2 lbf.
  • the loads and elongation values are determined by employing the Power Curve test method, which is described below.
  • a bra strap is described having various amounts of stretch calculated on the basis of inches, instead of percentages, between high and low forces such that the strap of a bra is stretched distances that range from about 5 to 12 inches in length.
  • the strap of the invention is defined in terms of percentages such that the differences between high and low stretching are on the order of 50%, 70%, 90% and the like.
  • a strap prepared according to the invention is utilized in clothing and is illustrated using various mathematical expressions where the elongation E is shown based on its relationship with force F using data provided by the Power Curve test method.
  • a bra is provided where its design properties are depicted according to a relationship between the length of its strap and the amount of its stretching at top and minimal loads.
  • FIG. 1 shows a relationship between elongation and force for conventional straps and straps according to a first exemplary embodiment of the present invention
  • FIG. 2 shows a relationship between elongation and force for conventional straps and straps according to a second exemplary embodiment of the present invention
  • FIG. 3 shows a drawing-in and reed plan according to a first exemplary embodiment of the present invention, wherein B indicates Back Yarn, F indicates Face Yarn, R indicates Covered Elastomeric Yarn, and O indicates Binding Yarn;
  • FIG. 4 shows a heald frame lifting plan according to a first exemplary embodiment of the present invention, wherein X indicates Up on chain, C indicates Center on chain, and a blank indicates Down on chain;
  • FIG. 5 shows a drawing-in and reed plan according to a second exemplary embodiment of the present invention, wherein O indicates Binding Yarn, I indicates Face Yarn, B indicates Back Yarn, R indicates Covered Elastomeric Yarn, and M indicates Static Polyester Monofilament Yarn;
  • FIG. 6 shows a heald frame lifting plan according to a second exemplary embodiment of the present invention, wherein X indicates Up on chain, C indicates Center on chain, and a blank indicates Down on chain;
  • FIG. 7 shows an exemplary needle edge construction according to the first, second, third, fifth, and sixth exemplary embodiments of the present invention.
  • FIG. 8 shows a relationship between elongation and force for conventional straps, a strap according to a first exemplary embodiment of the present invention, and a strap according to a third exemplary embodiment of the present invention
  • FIG. 9 shows a brassiere comprising a strap according to a third exemplary embodiment of the present invention having a binding area and a split area;
  • FIG. 10 shows a strap according to a third exemplary embodiment of the present invention having a binding area and a split area;
  • FIG. 11 shows a drawing-in and reed plan according to a third exemplary embodiment of the present invention.
  • FIG. 12 shows a heald frame lifting plan of a strap body according to a third exemplary embodiment of the present invention, wherein X indicates Up on chain, C indicates Center on chain, and a blank indicates Down on chain;
  • FIG. 13 shows a heald frame lifting plan of a Jacquard area according to a third exemplary embodiment of the present invention, wherein X indicates Up on chain, C indicates Center on chain, and a blank indicates Down on chain;
  • FIG. 14 shows a relationship between elongation and force for conventional straps, a strap according to a first exemplary embodiment of the present invention, and the predicted relationship between elongation and force for a strap according to a fourth exemplary embodiment of the present invention
  • FIG. 15 shows a movement number chart according to a fourth exemplary embodiment of the present invention.
  • FIG. 16 shows a pattern chain according to a fourth exemplary embodiment of the present invention.
  • FIG. 17 shows a relationship between elongation and force for conventional straps, a strap according to a first exemplary embodiment of the present invention, and a strap according to a fifth exemplary embodiment of the present invention
  • FIG. 18 shows a drawing-in and reed plan according to a fifth exemplary embodiment of the present invention, wherein B indicates Back Yarn, F indicates Face Yarn, R indicates Covered Elastomeric Yarn, and O indicates Binding Yarn;
  • FIG. 19 shows a heald frame lifting plan according to a fifth exemplary embodiment of the present invention, wherein X indicates Up on chain, C indicates Center on chain, and a blank indicates Down on chain;
  • FIG. 20 shows a relationship between elongation and force for a conventional strap, a strap according to a first exemplary embodiment of the present invention, and a strap according to a sixth exemplary embodiment of the present invention
  • FIG. 21 shows a strap according to a sixth exemplary embodiment having been manufactured by weaving a fabric and folding the fabric over onto itself in a lengthwise direction.
  • FIG. 22 shows a drawing-in and reed plan according to a sixth exemplary embodiment of the present invention.
  • FIG. 23 shows a heald frame lifting plan according to a sixth exemplary embodiment of the present invention, wherein X indicates Up on chain and a blank indicates Down on chain.
  • FIGS. 1-2 show the relationship between elongation and load (also herein referred to as "force") for conventional straps and straps according to the first and second exemplary embodiments of the present invention.
  • the lower of the two horizontal lines in FIGS. 1-2 represents the approximate minimum force (0.6 lbf) that most women deem as adequate support.
  • the upper of the two horizontal lines in FIGS. 1-2 represents the approximate maximum force (2.2 lbf) that most women find comfortable. Accordingly, it is desirable for a bra strap to exert a force between these two lines, between about 0.6 to about 2.2 lbf, over a range of extensions of the strap.
  • beneficial ranges of force are provided according to the principles of the invention such as between about 0.3 to about 3.0 lbf, between about 0.4 to about 2.8 lbf, between about 0.5 to about 2.6 lbf, between about 0.5 to about 2.4 lbf, between about 0.6 to about 2.4 lbf, between about 0.8 to about 2.0 lbf, and between about 1.0 to about 1.8 lbf.
  • a bra strap in order to remove the need to adjust the length of the bra strap prior to use, it is desirable for a bra strap to exert a force within the desired force range over a wide range of elongation.
  • the conventional straps exert a force within the desired force range only over a very small range of elongation.
  • the straps according to the present invention exert a force within the desired force range over a wide range of elongation. Therefore, women of varying heights (e.g., varying distances from top of bra cup to top of shoulder) may wear a bra incorporating the straps of the present invention comfortably without the need to adjust the length of the straps.
  • the bra straps need to have the ability to stretch approximately 61 ⁇ 2 inches in length, or between 6 and 7 inches in length, or between 51 ⁇ 2 and 8 inches in length while remaining within a defined force range.
  • straps are provided that stretch about 5 inches, about 6 inches, about 7 inches, about 8 inches, about 9 inches, about 10 inches, about 1 1 inches, or about 12 inches in length while maintaining forces within a beneficial force range according to the principles of the invention.
  • the elongation of the strap is low at the lower end of the desired force range.
  • the strap may impart a force that is comfortable and sufficient to provide support without requiring the strap to stretch to a large degree.
  • a bra incorporating such a strap may be comfortable to a relatively short woman without a need to decrease the length of the strap.
  • the bra strap may be stretched no more than 25% when subjected to a load of 0.6 lbf.
  • the amount of stretch given as a percentage means the length of the strap in an unstretched state subtracted from the length of the stretched strap divided by the length of the strap in an unstretched state.
  • the strap is stretched no more than 20%, or no more than 15% when subjected to a load of 0.6 lbf.
  • the elongation of the strap is high at the upper end of the desired force range.
  • the strap will provide support and may be stretched a large amount before it will impart a force that exceeds that which is comfortable to the wearer.
  • a bra incorporating such a strap may be comfortable to a relatively tall woman without a need to increase the length of the strap.
  • the strap may be stretched at least approximately 70% when subjected to a load of 2.2 lbf.
  • a strap with a relaxed length of approximately 91 ⁇ 4 inches may be used.
  • the strap may be stretched at least about 87% when subjected to a load of 2.2 lbf.
  • a strap with a relaxed length of 71 ⁇ 2 inches may be used.
  • the strap may be stretched at least around 1 14% when subjected to a load of 2.2 lbf.
  • a strap with a relaxed length of approximately 53 ⁇ 4 inches may be used.
  • these dimensions are illustrative as a wide range of finished straps may be employed depending on aesthetics and design factors such as back strap size and location, cup size and dimensions, locations of intersections of straps with back strap and cup, and the like.
  • a strap may be designed to provide and may attain various stretched lengths while supporting appropriate loads without discomfort.
  • a strap may stretch at least about 5 inches, about 6 inches, about 7 inches, about 8 inches, about 9 inches, about 10 inches, about 11 inches, or about 12 inches when a load at the top of the range is applied.
  • the unstretched length of the strap may be between 14 and 18 inches, between 12 and 14 inches, between 10 and 12 inches, between 8 and 10 inches, between 6 and 8 inches, or less than 6 inches.
  • the difference between the length of the strap when subjected to a load of 2.2 lbf and when subjected to a load of 0.6 lbf may be at least 4 inches, at least 5 inches, at least 6 inches, at least 7 inches, at least 8 inches, or approximately 61 ⁇ 2 inches.
  • the difference between the elongation of the strap when subjected to a load of 2.2 Ibf and when subjected to a load of 0.6 Ibf may be at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or at least 100%.
  • the difference in stretch between the top and bottom loads of the force range is 50%, when the stretch at the top load is 75% and the stretch at the bottom load is 25%.
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality:
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality:
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality: -0.6ft/
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality: E ⁇ F - 0.6lbf
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality:
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality: lAlbf where F is the load applied to the strap for all loads between 0.6 Ibf and 2.2 Ibf.
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality: lAlbf where F is the load applied to the strap for all loads between 0.6 Ibf and 2.2 Ibf.
  • the elongation of the strap, E measured as a percentage, satisfies the following inequality:
  • F is the load applied to the strap for all loads between 0.6 lbf and 2.2 lbf.
  • a bra comprises a strap with a length chosen based on the stretch properties of the strap.
  • the length of the strap may be chosen so that the following inequality is satisfied:
  • a A where L is the length of the strap, measured in inches, in an unstretched state, ⁇ is the difference between the amount of stretch, measured in inches, of a four inch section of the strap when subjected to a load of 0.6 lbf and the amount of stretch, measured in inches, of a four inch section of the strap when subjected to a load of 2.2 lbf.
  • Constant "a” may be 3 inches, 4 inches, 5 inches, or 6 inches.
  • Constant "b” may be 7 inches, 8 inches, 9 inches, 10 inches, 1 1 inches, or 12 inches.
  • the width of the strap may be between approximately 4 mm and 20 mm or between approximately 9 mm and 15 mm. In more specific aspects, the width of the strap may be between approximately 4 mm and 6 mm, between approximately 9 mm and approximately 1 1 mm, between approximately 11 mm and approximately 13 mm, or between approximately 13 mm and approximately 15 mm. Further, the width of the strap may be approximately 5 mm, 10 mm, 12 mm, or 14 mm.
  • a strap exhibiting the stretch properties described above may be manufactured in multiple ways.
  • a strap may be manufactured by weaving, knitting, braiding or by making a narrow tape with a flexible material such as polyurethane or latex rubber individually or together with a textile material to look and perform like a strap.
  • a flexible material such as polyurethane or latex rubber individually or together with a textile material to look and perform like a strap.
  • two exemplary embodiments of a woven strap are provided.
  • a strap is formed by weaving a covered elastomeric yarn, a face yarn, a back yarn, a binding yarn, two weft yarns, and a catch thread. The details for these yarns are provided below.
  • the details of the covered elastomeric yarn are as follows.
  • a core elastomeric yarn of 400 decitex is provided.
  • the core yarn is stretched to a draft of 4.9 and is covered by a bottom cover yarn and a top cover yarn while the core yarn is stretched.
  • Draft is a unitless measure of how much a single unit of elastomeric yarn will be stretched to at the point at which the elastomeric yarn is covered. For example, a draft of 4.9 indicates that 1 unit of an elastomeric yarn will be stretched to 4.9 units.
  • the bottom cover yarn is 1/20/20 Polyamide 6.6 Z textured.
  • the top cover yarn is 1/20/20 Polyamide 6.6 Z textured.
  • the core yarn is covered by the bottom cover yarn at a rate of 800 Turns Per Meter ("TPM").
  • TPM refers to number of revolutions the cover yarn makes around the core yarn per meter of length of the core yarn.
  • the core yarn and bottom cover yarn are covered by the top cover yarn at a rate of 620 TPM.
  • the top cover yarn is wrapped around the core yarn and bottom cover yarn in a direction opposite to that in which the bottom cover yarn is wrapped around the core yarn.
  • the details of the remaining yarns are as follows.
  • the face yarn is 2/44/34/100 Polyamide 6.6 SD textured.
  • the back yarn is 2/44/34/100 Polyamide 6.6 SD textured.
  • the binding yarn is 1/44/12/150 Polyamide 6 BT flat.
  • the first weft yarn is 1/44/12 Polyamide 6.6 SD flat.
  • the second weft yarn is 1/44/12 Polyamide 6.6 SD flat.
  • the catch thread is 1/78/24 Polyamide 6.6 SD textured.
  • the covered elastomeric yarn, face yarn, back yarn, binding yarn, first and second weft yarns, and catch thread are woven according to the drawing-in and reed plan shown in FIG. 3, the heald frame lifting plan shown in FIG. 4, and the needle edge construction shown in FIG. 7.
  • warp yarn 5, top and bottom weft yarns 2, and catch thread 3 are constructed using weft needle 1 and latch needle 4.
  • Top and bottom weft yarns 2 thus become weft yarns on the fabric 6.
  • the two weft yarns are fed according to a twin weft construction.
  • the width of the strap may be controlled by varying the number of ends of the yarns.
  • FIG. 1 The load-elongation relationship for straps according to the first exemplary embodiment of the present invention is shown in FIG. 1.
  • the curve for each strap represents the load applied at a given elongation during the expansion of the strap.
  • the three, nearly vertical curves shown together on the left hand side of FIG. 1 reflect the sharp, high force at low elongation relationship possessed by conventional straps (having widths of 14 mm, 12 mm and 10 mm, respectively from left to right).
  • the three gradually sloping, flat power curves that extend to the right of the vertical curves demonstrate the properties of one example of the invention for straps having widths of 14 mm, 12 mm and 10 mm (from left to right).
  • the flat power curves exhibit a dramatically greater range of stretching or elongation compared to conventional straps within a similar range of force.
  • the core yarn used in Example 1 is a 400 decitex spandex manufactured by Lubrizol.
  • Other useful yarns include the elastomeric sold under the trademark LYCRA 902 manufactured by Invista, the elastomeric sold under the trademark CREORA manufactured by Hyosung, the elastomeric sold under the trademark ROICA HS manufactured by AsahiKASEI, and the like.
  • any textile yarn may be incorporated as long as it meets the desired load-elongation parameters according to the principles of the invention.
  • other manufacturing variables such as modified values for draft and TPM may be used according to the principles of the invention. It is understood that depending on the selected construction and desired aesthetics, the spandex can be either bare, single covered, double covered, air covered or even knitted around with a chain stitch to use as a covered yarn.
  • a strap is formed by weaving a covered elastomenc yarn, a face yarn, a back yarn, a binding yarn, two weft yarns, and a catch thread. The details for these yarns are provided below.
  • the details of the covered elastomeric yarn are as follows. A core spandex yarn of 400 decitex, is provided. The core yarn is stretched to a draft of 3.4 and is covered by a cover yarn while it is stretched. The cover yarn is 1/20/20 Polyamide 6.6 Z textured. The core yarn is covered by the cover yarn at a rate of 900 TPM.
  • the details of the remaining yarns are as follows.
  • the face yarn is 1/44/12/150 Polyamide 6 BT flat.
  • the back yarn is 2/44/12/100 Polyamide 6 SD textured yarn.
  • the binding yarn is 1/44/12/150 Polyamide 6 BT flat.
  • the first weft yarn is 1/44/12 Polyamide 6 BT flat.
  • the second weft yarn is 1/44/12 Polyamide 6 BT flat.
  • the catch thread is 1/44/12 Polyamide 6 SD textured.
  • the covered elastomeric yarn, face yarn, back yarn, binding yarn, first and second weft yarns, and catch thread are woven according to the drawing-in and reed plan shown in FIG. 5, the heald frame lifting plan shown in FIG. 6, and the needle edge construction as shown in FIG. 7.
  • the two weft yarns are fed according to a twin weft construction.
  • the number of ends of the tape will vary. For example, for a 10 mm shiny strap, 84 covered spandex ends, 58 face yarn ends, 35 back yarn ends, and 31 binding yarn ends are used. For a 12 mm shiny strap, 92 covered spandex ends, 78 face yarn ends, 43 back yarn ends, and 40 binding yarn ends are used.
  • FIG. 2 The load-elongation relationship for straps according to the second exemplary embodiment of the present invention is shown in FIG. 2.
  • the curve for each strap represents the load applied at a given elongation during the expansion of the strap.
  • the three, nearly vertical curves shown together on the left hand side of FIG. 2 reflect the sharp, high force at low elongation relationship possessed by conventional straps (having widths of 14 mm, 12 mm and 10 mm, respectively from left to right).
  • the three gradually sloping, flat power curves that extend to the right of the vertical curves demonstrate the properties of one example of the invention for straps having widths of 14 mm, 12 mm and 10 mm (from left to right).
  • the flat power curves exhibit a dramatically greater range of stretching or elongation compared to conventional straps within a similar range of force.
  • the core yarn used in Example 2 is a 400 decitex spandex manufactured by Lubrizol.
  • Other useful yarns include the elastomeric sold under the trademark LYCRA 902 manufactured by Invista, the elastomeric sold under the trademark CREORA manufactured by Hyosung, the elastomeric sold under the trademark ROICA HS manufactured by AsahiKASEI, and the like.
  • cover yarn may be 1/10/2 polyamide 6 or 66, 1/20/12 or 1/44/12 or 1/78/24 Nylon 6, 66, polyester or any textile yarn.
  • the face yarn, back yarn, binding yarn, top weft yarn, bottom weft yarn, and catch thread may be 1/20/12 bright or semi dull (SD) or Full Dull (FD) N6 or 66, 1/78/24 polyamide 6 or 66 bright or semi dull (SD) or Full Dull (FD), 1/110/34 polyamide 6 or 66 bright or semi dull (SD) or Full Dull (FD) or even polyester of similar counts or any textile yarn provided the described elongation-load relationship is met according to the invention. Further, other values for draft and TPM may be used according to the principles of the invention. It is understood that depending on the selected construction and desired aesthetics, the elastomeric yarn can be either bare, single covered, double covered, air covered or even knitted around with a chain stitch to use as a covered yarn.
  • the strap described in Example 1 results in a "flatter" power curve than the power curve of the strap described in Example 2. It is desirable that a strap have a power curve the same as or similar to the power curves for Examples 1 and 2. It is also desirable for a strap to have a power curve that falls between the power curves for Examples 1 and 2.
  • composition and construction of the elastomeric yarns in a strap affect the power curve of the strap.
  • manner in which the strap is constructed affects the power curve of the strap. Accordingly, one of ordinary skill in the art will appreciate that it is possible to manufacture fabrics with a range of elastic properties and that it is possible to manufacture fabrics having the same elastic properties in numerous ways.
  • the count of the core yarn and cover yarns, the draft of the core yarn, the arrangement of the covering yarn (e.g., single-covered, double-covered, or air-mingled), and the TPM of the covering yarn when the core yarn is single-covered or double-covered by the covering yarn are factors that influence the elastic properties of the elastomeric yarn.
  • the covering yarn e.g., single-covered, double-covered, or air-mingled
  • a "weaker” elastomeric yarn For example, by increasing the draft while holding the TPM and count of the yarns constant, a "weaker” elastomeric yarn will result.
  • a "weaker” elastomeric yarn it is meant an elastic with more stretch for a given load, i.e., an elastic with a flatter power curve.
  • a “stronger” elastomeric yarn By a “stronger” elastomeric yarn, it is meant an elastic with less stretch for a given load, i.e., an elastic with a sharper power curve.
  • a low draft and a low TPM will result in a stronger elastomeric yarn. Conversely, a high draft and a high TPM will result in a weaker elastomeric yarn.
  • the method of construction e.g., weaving or knitting
  • the density of the warp and weft yarns in the fabric i.e. the number of picks per cm (i.e. the number of threads in the weft direction)
  • the amount of elastomeric yarn in the fabric i.e. the number of threads in the weft direction
  • tensioning in the fabric during the finishing and dyeing steps are factors that influence the elastic properties of the strap.
  • One of ordinary skill in the art will appreciate that changing these parameters in a given manner will tend to either increase or decrease the stretch of the strap.
  • Examples 3-6 described below, are further exemplary embodiments where desirable power curves are obtained.
  • a strap has two sections: a body part and a Jacquard area.
  • the Jacquard area comprises a split-strap part and a binding area as shown in FIGS. 9 and 10. The details of these yarns are provided below.
  • the strap is formed by weaving a covered elastomeric yarn, two weft yarns and a binder yarn.
  • a gut yarn is provided inside the tubular strap to fill the tubular strap and thereby provide improved comfort for the wearer.
  • the details of the covered elastomeric yarn are as follows.
  • a 78 decitex spandex yarn is provided as the core elastomeric yarn.
  • the core yarn is stretched to a draft of 2.9 and is covered by a cover yarn while the core yarn is stretched.
  • the cover yarn is 1/78/24 Polyamide 6 SD Textured z twist.
  • the core yarn is covered by the cover yarn at a rate of 804 TPM.
  • the details of the remaining yarns are as follows.
  • the gut yarn is 2/78/24 Polyamide SD textured N6.
  • the first weft yarn is 1/44/12 Polyamide 6.6 SD Flat.
  • the second weft yarn is 1/44/12 Polyamide 6.6 SD Flat.
  • the binder yarn is composed of two covered yarns that are the same as the covered yarn used for the warp.
  • the yarns are woven according to the drawing-in and reed plan shown in FIG. 11, the heald frame lifting plans shown in FIGS. 12 and 13, and the needle edge construction shown in FIG. 7. Other needle edge constructions known to those of ordinary skill in the art may be used.
  • the heald frame lifting plan in FIG. 12 is for the strap body and the heald frame lifting plan in FIG. 13 is for the Jacquard area. Based on the width of the strap, the number of ends of the yarn will vary. For a 10 mm strap, 164 covered elastomeric yarns and 72 gut yarns may be used.
  • each curve represents the load applied at a given elongation during the expansion of the respective strap.
  • the three curves on the left hand side represent the power curves of conventional straps.
  • the curve on the right hand side represents the power curve of a 10 mm strap according to the first exemplary embodiment.
  • the curve in the middle labeled "SJ49920-10mm,” represents the power curve of a 10 mm strap made according to the third exemplary embodiment of the present invention.
  • a strap is knitted.
  • a 400 decitex elastomeric yarn is provided.
  • a covered elastomeric yarn is knitted.
  • the covered elastomeric yarn comprises a core yarn of a 78 decitex elastomeric yarn covered by a 1/44/13 Polyamide 6.6 SD textured parallel yarn.
  • the core yarn of the warp is covered by the cover yarn by air mingling.
  • single covered, double covered, or regular yarn may be used as the warp.
  • the weft yarn is 2/78/24 Polyamide SD textured N6.6.
  • each curve represents the load applied at a given elongation during the expansion of the respective strap.
  • the three curves on the left hand side represent the power curves of conventional straps.
  • the curve on the right hand side represents the power curve of a 10 mm strap according to the first exemplary embodiment.
  • the curve in the middle labeled "SK49919_10mm,” represents the predicted power curve of a 10 mm strap according to the fourth exemplary embodiment of the present invention.
  • a strap is formed by weaving a covered elastomeric yarn, a face yarn, a back yarn, a binding yarn, two weft yarns, and a catch thread.
  • the details of the covered elastomeric yarn are as follows.
  • a core elastomeric yarn of 400 decitex is provided.
  • the core yarn is stretched to a draft of 4.9 and is covered by a bottom cover yarn and a top cover yarn while the core yarn is stretched.
  • the bottom cover yarn is 1/20/20 Polyamide 6.6 Z SD textured.
  • the top cover yarn is 1/20/20 Polyamide 6.6 Z SD textured.
  • the core yarn is covered by the bottom cover yarn at a rate of 800 Turns Per Meter ("TPM").
  • TPM Turns Per Meter
  • the core yarn and bottom cover yarn are covered by the top cover yarn at a rate of 620 TPM.
  • the yarn has a covered rubber stretch (relaxed length) of 305% of the length of the original core yarn.
  • the details of the remaining yarns are as follows.
  • the face yarn is 2/44/34/100 Polyamide 6.6 SD textured.
  • the back yarn is 2/44/34/100 Polyamide 6.6 SD textured.
  • the binding yarn is 1/44/12/150 Polyamide 6 BT flat.
  • the first weft yarn is 1/44/12 Polyamide 6.6 SD flat.
  • the second weft yarn is 1/44/12 Polyamide 6.6 SD flat.
  • the catch thread is 1/78/24 Polyamide 6.6 SD textured.
  • the covered elastomeric yarn, face yarn, back yarn, binding yarn, first and second weft yarns, and catch thread are woven according to the drawing-in and reed plan shown in FIG. 18, the heald frame lifting plan shown in FIG. 19, and the needle edge construction shown in FIG. 7. Other needle edge constructions may be used.
  • the two weft yarns may be fed according to a twin weft construction.
  • each curve represents the load applied at a given elongation during the expansion of the respective strap.
  • the three curves on the left hand side represent the power curves of conventional straps.
  • the curve on the right hand side represents the power curve of a 10 mm strap according to the first exemplary embodiment.
  • the curve immediately adjacent to the curve on the right hand side labeled "SW49852-10mm,” represents the power curve of a 10 mm strap made according to the fifth exemplary embodiment of the present invention.
  • a strap is formed by weaving a covered elastomeric yarn and a weft yarn. The yarn is then folded over onto itself in the lengthwise direction and secured, such that the final width of the strap is half of the width of the original woven fabric as shown in FIG. 21.
  • the details of the covered elastomeric yarn are as follows.
  • a core elastomeric yarn of 400 decitex is provided.
  • the core yarn is stretched to a draft of 4.9 and is covered by a bottom cover yarn and a top cover yarn while the core yarn is stretched.
  • the bottom cover yarn is 1/20/20 Polyamide 6.6 Z SD textured.
  • the top cover yarn is 1/20/20 Polyamide 6.6 Z SD textured.
  • the core yarn is covered by the bottom cover yarn at a rate of 800 TPM.
  • the core yarn and bottom cover yarn are covered by the top cover yarn at a rate of 620 TPM.
  • the yarn has a covered rubber stretch (relaxed length) of 305% of the length of the original core yarn.
  • the weft yarn is 1/110/34 Polyamide 6.6 SD flat.
  • the covered elastomeric yarn and weft yarn are woven according to the drawing- in and reed plan shown in FIG. 22 and the heald frame lifting plan shown in FIG. 23.
  • FIG. 20 The load-elongation relationship for a 16 mm strap according to the sixth exemplary embodiment of the present invention is shown in FIG. 20.
  • each curve represents the load applied at a given elongation during the expansion of the respective strap.
  • the curve on the left hand side represents the power curves of a conventional 16 mm strap.
  • the curve labeled "SW48303-16mm” represents the power curve of a 16 mm strap according to the first exemplary embodiment.
  • the curve labeled "SW49826-32mm” represents the power curve of a 16 mm strap (after folding) made according to the sixth exemplary embodiment of the present invention.
  • the core yarns in examples 3-6 may be a spandex manufactured by Lubrizol.
  • Other useful yarns include the elastomeric sold under the trademark LYCRA 902 manufactured by Invista, the elastomeric sold under the trademark CREORA manufactured by Hyosung, the elastomeric sold under the trademark ROICA HS manufactured by AsahiKASEI, and the like.
  • the test is performed on a constant rate elongation tensile tester with a low range load cell (approximately 100 lbs).
  • a Tinius Olsen H5 may be used as the constant rate tensile tester.
  • the web is conditioned for four hours prior to testing at 20°C +/- 2°C and 65% +/- 2% relative humidity.
  • test specimens are 6 inches in length. A four inch bench mark is centered on the specimen.
  • the cross head speed is 10 inches/minute.
  • the jaw clamps are 3 inches wide.
  • the gauge length is 4 inches.
  • the specimen is elongated to a specified load and returned to zero extension.
  • the specified loads are as follows:
  • the specified load is 3.3 lbs.
  • the specified load is 9.35 lbs.
  • the specified load is 16.5 lbs.
  • the load-elongation Power Curve test method directly measures how much a four inch long section of a strap stretches under a given load. In order to determine how much a strap of a length other than four inches will stretch, it is necessary to multiply the length the four inch long section stretches by the ratio of the length of the strap to four inches. For example, if it has been measured that a four inch long section stretches 3 inches when a load of 2.0 Ibf is applied, it can be determined that a 10 inch long strap will stretch 7.5 inches (3 inches*(10 inches/4 inches)) when a load of 2.0 Ibf is applied.
  • the elongation of a 10 inch strap may be determined even though only four inch sections are stretched according to the load-elongation Power Curve test method.
  • the calculated length that a strap, having a length other than four inches, stretches under a given load is referred to as the "Calculated Stretched Length.”
  • the Calculated Stretched Length is 7.5 inches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Corsets Or Brassieres (AREA)
  • Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)

Abstract

L'invention porte sur une bretelle de soutien gorge qui a des propriétés d'étirement, de telle sorte que la bretelle exerce une force qui est suffisante pour fournir un support adéquat mais ne dépasse pas une force qui est confortable pour le porteur sur une grande plage d'allongement. Ainsi, la brettelle de soutien gorge peut être portée par des femmes de tailles différentes sans avoir besoin de changer la longueur de la bretelle avant utilisation.
EP11755433.7A 2010-07-30 2011-07-13 Bretelle de soutien gorge auto-ajustable Withdrawn EP2597983A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US36953910P 2010-07-30 2010-07-30
US13/173,549 US20120028542A1 (en) 2010-07-30 2011-06-30 Self-Adjusting Bra Strap
PCT/IB2011/001633 WO2012014030A1 (fr) 2010-07-30 2011-07-13 Bretelle de soutien gorge auto-ajustable

Publications (1)

Publication Number Publication Date
EP2597983A1 true EP2597983A1 (fr) 2013-06-05

Family

ID=44586494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11755433.7A Withdrawn EP2597983A1 (fr) 2010-07-30 2011-07-13 Bretelle de soutien gorge auto-ajustable

Country Status (4)

Country Link
US (1) US20120028542A1 (fr)
EP (1) EP2597983A1 (fr)
GB (1) GB2482390A (fr)
WO (1) WO2012014030A1 (fr)

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CN107644138A (zh) * 2017-09-29 2018-01-30 东华大学 一种机织小花纹组织设计软件的设计方法

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US20120028542A1 (en) 2012-02-02
GB201111996D0 (en) 2011-08-31
WO2012014030A1 (fr) 2012-02-02
GB2482390A (en) 2012-02-01

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