• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a fabric for shading purposes, formed from interwoven warp and weft yarns based on fluoropolymer resins, wherein the warp and weft yarns are each formed of warp and weft threads, of which at least the warp threads are individually twisted in a first direction of rotation and at least the weft yarns comprise a plurality of weft yarns which are twisted together, and the warp and weft yarns are interwoven in a cross-twill weave having a pitch of 4 to 14 to the fabric.
    公开号:CH706885B1
    申请号:CH00384/13
    申请日:2013-02-01
    公开日:2016-07-15
    发明作者:Bloch Klaus
    申请人:Bloch Klaus；
    IPC主号:
    专利说明:

    The invention relates to a fabric, in particular for shading purposes, formed from interwoven warp and weft yarns based on fluoropolymer resins.
    It is already known to use fabrics of fluoropolymer plastics, in particular polytetrafluoroethylene (PTFE) for textile construction, for example, free-fall structures. The basis weights used in this case are generally between 300 and 2200 g per m 2, whereby a wide variety of fabric weaves are used. PTFE yarns of 380, 440, 880 and 1200 dtex are used here as single yarn or in twisted constructions.
    Thus, for example, in the mosque of Medina in 1992/93 with such PTFE fabrics as a free-span structure twelve large umbrellas of white paint in each 600 m <2> surface installed.
    In such exposed to high solar radiation fabrics for shading pure PTFE is used primarily because according to current knowledge exclusively the plastic PTFE in such heat and UV-exposed regions is virtually no strength degradation subject and a life of 25 years or more for such fabrics can be adopted.
    In addition, reference may be made to the state of the art to DE 20 2006 008 868 U1.
    From WO 2009 000 340 A1, it is also already known to form a PTFE fabric for shading from twill 3/3 bond with grade two interwoven warp and weft threads, the warp threads and three successive weft threads in a first color and the fourth weft thread is executed in a different color. This fabric has, for example, on the top a pure white color and on the bottom of a slightly sand-colored tint, which is extremely advantageous from the viewpoint of radiation reflection and shading effect. However, the tensile strength achievable with this fabric is limited at the expected temperatures of, for example, 55 ° C in the direction of the warp and weft yarns, so that the size of the e.g. are limited by free-plane structures spanned surface.
    The object of the invention is therefore to propose a fabric of the type mentioned above, which also in strongly UV and heat-stressed regions has superior strength values both in terms of tensile strength in the direction of the warp and weft yarns as well as in terms of Nahtausreissfestigkeit, so that it can be processed into fabric sheets for free-span structures of unprecedented size.
    To achieve the object, the design of a fabric according to the invention with the features of claim 1 is proposed.
    Advantageous embodiments and modifications of the invention are the subject of the dependent claims.
    The inventive proposal is to form the warp and weft yarns each of warp and weft threads, of which at least the warp threads are individually twisted in a first direction of rotation and at least the weft yarns comprise a plurality of weft threads, which are twisted together and the warp and weft yarns in cross-twill weave with a pitch of 4 to 14 are woven into the fabric.
    Such a ausgestaltetes fabric has the highest resistance to temperature and UV radiation exposure and has such high strengths with respect to tensile stress at 55 ° C both in the direction of the warp yarns and in the direction of weft yarns and particularly high seam tear strengths that it Fabric webs of extreme size, for example, an area up to 3500 m <2> can be easily processed in the context of free-fall structures.
    Advantageously, the warp and weft threads for the warp and weft yarns are preferably formed from pure polytetrafluoroethylene to achieve the highest UV resistance. They can be cut, for example, in the appropriate yarn size from a flat sheet material.
    The warp yarns of the inventive fabric may be formed according to a proposal of the invention from a single twisted warp yarn having a yarn density of 95 to 130 yarns / cm.
    In another embodiment of the invention, it is also possible to form the warp yarns of a plurality of individually twisted warp yarns having a yarn density of 20 to 65 yarns / cm. According to a further proposal of the invention, these warp yarns formed from a plurality of individually twisted warp yarns are formed by jointly twisting the twisted warp yarns in the second direction of rotation opposite to the first direction of rotation.
    Suitable yarn counts for the warp and weft threads include, for example, 380 to 440 dtex.
    The high strength of the warp and weft yarns used in the context of the invention for the fabric results from a twist of the individual warp and / or weft threads about their longitudinal axis in a first direction of rotation with 400 to 700 tours / m. Particularly suitable for the twisting of the warp threads are considered 600 tours / m.
    Also, the weft threads can be individually twisted in such a manner in a first direction of rotation, with about 400 to 700 tours / m are considered advantageous here as well. The weft yarns also have a yarn density of about 35 to 70 yarns / cm.
    At least the weft yarns comprise a plurality of individual weft threads, which are twisted together to the weft yarns, this twisting is effected, for example, with 200 to 450 tours / m.
    If the weft threads are twisted individually in a first direction of rotation, the common twisting is carried out to form the weft yarn in the opposite second direction of rotation. But it is also possible not to twist the weft threads individually so that they are in a straight, untwisted shape. In this case, the same can be done directly to the weft yarn in one of the two directions of rotation.
    Another embodiment of the invention is to form the warp yarns from two or four warp yarns twisted individually in the first direction of rotation, e.g. with about 30 to 40 tours / m, preferably 35 tours / m are twisted together in the opposite direction of rotation. Suitable numbers of turns for twisting the individual warp threads are 400-700, preferably 600 touring / m. Using these warp yarns, a high strength fabric is obtained which significantly reduces the need for warp manufacturing due to the use of a double or quadruple twist.
    According to a further embodiment of the invention, the fabric may also have different colors on the top and bottom. In this case, the warp yarns and n-weft yarns are made of warp or weft yarns of a first color, e.g. White, formed, and the following m-weft yarns have at least one weft in a different color from the first color, e.g. a sand-colored weft thread, which is twisted together with the remaining white weft threads of the weft yarn. In these cases n is an integer between 1 and 6 and m is an integer between 1 and 2.
    Due to the inventively proposed Kreuzköperbindung with a grade of 4 to 14, e.g. Cross-twill 8/8 or cross-twill 12/12, fabrics are produced which have a tensile strength at 55 ° C in the direction of the warp and weft yarns of at least 5185 N / 5 cm.
    In the binding cartridge, a specific and for the achieved in the context of the invention strength values essential characteristic of a course shows both from bottom left to top right and from bottom right to top left. In this way, the fabric according to the invention achieves biaxial values for the ratio of the strengths between warp and weft directions between 0.8 and 1.2, which was unachievable with previously known fabrics.
    EXAMPLES
    example 1
    As warp yarn was a warp of white PTFE a yarn thickness of 380 dtex with 600 turns / m twisted in a first direction of rotation. As a weft yarn two weft threads of white PTFE were first twisted with 700 tours / m individually in the first direction of rotation, and then together with 400 tours / m counter to the first direction of rotation, i. twisted in the second direction of rotation. Two such weft yarns formed from two white single weft yarns were then followed by two weft yarns each comprising a PTFE weft yarn of 380 dtex yarn thickness in white and a weft yarn of 440 dtex in sand color. These were first individually twisted with 700 tours / m in the first direction of rotation and then twisted the white and the sand-colored twisted weft thread together with 400 tours / m in the second direction of rotation. From the warp and weft yarns thus formed, a woven fabric whose properties and strength values are shown in Table 1 was then woven in grade-6 cross-twill 8/8 weave.
    Example 2
    To form the warp yarns, two white PTFE warp yarns of a yarn thickness of 380 dtex were first individually twisted at 600 turns / m in the first direction of rotation and then twisted together with 300 turns / m in the second direction of rotation. To form the weft yarn three pure white weft yarns were woven, each comprising four weft threads of white PTFE of a thread thickness of 380 dtex, individually twisted at 600 turns / m in the first direction and then together with 300 turns / m in the second direction were twisted. Sand-colored weft yarn was woven, whereby three white PTFE wefts of a yarn thickness of 380 dtex and a sand-colored PTFE weft yarn of a thread thickness of 440 dtex were first individually twisted at 600 turns / m in the first direction of rotation and then together with 300 turns / m were twisted in the second direction of rotation. The weft yarns were used such that three pure white weft yarns were followed by a weft yarn comprising the sand weft, followed again by three pure white weft yarns. From these warp and weft yarns thus formed, a fabric having a light sand color on the upper side and on the lower side was woven in Kreuzköper 12/12 gradient 9 + 10, the properties and strength values of which are given in Table 1.
    Example 3
    As warp yarn, two warp yarns of white PTFE of a yarn thickness of 380 dtex were twisted individually with 600 turns / m in a first direction of rotation and then twisted together at 35 turns / m in the opposite second direction of rotation. As a weft yarn two wefts of white PTFE were first twisted with 700 tours / m individually in the first direction of rotation and then together with 400 tours / m counter to the first direction of rotation, i. in the second direction, twisted. Six such weft yarns formed from two white single weft yarns were then followed by two weft yarns each comprising a PTFE weft yarn of 380 dtex yarn strength in white and a weft yarn of 440 dtex in sand color. These were first individually twisted with 700 tours / m in the first direction of rotation and then twisted the white and the sand-colored twisted weft thread together with 400 tours / m in the second direction of rotation. From the warp and weft yarns thus formed, a woven fabric whose properties and strength values are shown in Table 1 was then woven in grade-6 cross-twill 8/8 weave.
    Example 4
    As warp yarn four warp threads of white PTFE a yarn thickness of 380 dtex were twisted with 600 tours / m individually in a first direction of rotation and then twisted together with 35 tours / m in the opposite second direction of rotation. As a weft yarn two wefts of white PTFE were first twisted with 700 tours / m individually in the first direction of rotation and then together with 400 tours / m counter to the first direction of rotation, i. in the second direction, twisted. Six such weft yarns formed from two white single weft yarns were then followed by two weft yarns each comprising a PTFE weft yarn of 380 dtex yarn strength in white and a weft yarn of 440 dtex in sand color. These were first individually twisted with 700 tours / m in the first direction of rotation and then twisted the white and the sand-colored twisted weft thread together with 400 tours / m in the second direction of rotation. From the warp and weft yarns thus formed, a woven fabric whose properties and strength values are shown in Table 1 was then woven in grade-6 cross-twill 8/8 weave.
    Example 5
    To form the warp yarns, two white PTFE warp yarns of a yarn thickness of 380 dtex were first individually twisted at 600 turns / m in the first direction of rotation and then twisted together with 300 turns / m in the second direction of rotation. To form the weft yarn, five pure white weft yarns were first woven, each comprising three weft threads of white PTFE with a thread thickness of 380 dtex, individually twisted at 600 turns / m in the first direction of rotation and then together with 300 turns / m in the second direction of rotation were twisted. Sand-colored weft yarn was woven, whereby three white PTFE weft yarns of a yarn thickness of 380 dtex and a sand-colored PTFE weft yarn of a yarn thickness of 440 dtex first individually twisted with 600 turns / m in the first direction of rotation and then together with 300 tours / m in the second direction of rotation were twisted. The weft yarns were used such that five virgin weft yarns were followed by a weft yarn comprising the sand weft, followed again by five pure white weft yarns. From these warp and weft yarns thus formed, a fabric having a light sand color on the upper side and on the lower side was woven in Kreuzköper 12/12 gradient 9 + 10, the properties and strength values of which are given in Table 1.
    The figures show the fabric structure of the examples explained above. Show it:<Tb> FIG. 1a <SEP> the binding cartridge of the tissue of Examples 1, 3 and 4;<Tb> FIG. 1b <SEP> the Schafteinzug of the fabric of Examples 1, 3 and 4;<Tb> FIG. 1c <SEP> the card of the fabric of Examples 1, 3 and 4;<Tb> FIG. 2a <SEP> the binding cartridge of the tissue of Examples 2 and 5;<Tb> FIG. 2b <SEP> the Schafteinzug of the fabric of Example 2 and 5;<Tb> FIG. 2c <SEP> the impact map of the fabric of Examples 2 and 5.
    It is understood that e.g. instead of the embodiment in Example 2 with 4 weft threads à 380 dtex also 2 weft threads à 760 dtex can be used to form the weft yarns.
    Table 1
    [0031]<tb> Garndichte Kette (Game / cm) <SEP> 110 <SEP> 110 <SEP> 56 <SEP> 28 <SEP> 110<tb> Garndichte Schuss (Game / cm) <SEP> 58 <SEP> 48 <SEP> 58 <SEP> 58 <SEP> 54<tb> Basis Weight (g / m <2>) <SEP> 1.006 <SEP> 1.772 <SEP> 982 <SEP> 982 <SEP> 1.708<tb> Thickness (mm) <SEP> 0.67 <SEP> 1.15 <SEP> 0.65 <SEP> 0.65 <SEP> 1.08<tb> Tensile Strength Shot Direction at 23 ° C (N / 5cm) <SEP> 8,521 <SEP> 14,466 <SEP> 8,138 <SEP> 8,138 <SEP> 11,372<tb> Tensile strength Weft direction at 55 ° C (N / 5cm) <SEP> 6.404 <SEP> 10.560 <SEP >> 5.185 <SEP >> 5.185 <SEP >> 8.105<tb> Tensile Strength Warp at 23 ° C (N / 5cm) <SEP> 7.723 <SEP> 15.239 <SEP> 7.158 <SEP> 7.158 <SEP> 12.298<tb> Tensile Strength Warp at 55 ° C (N / 5cm) <SEP> 5.567 <SEP> 11.124 <SEP >> 5.185 <SEP >> 5.185 <SEP >> 8.105<tb> Seam strength (N / 5cm) <SEP >> 4.926 <SEP >> 7.700 <SEP >> 4.926 <SEP >> 4.926 <SEP >> 7.700<tb> Air permeability in liters / dm <2> / min at 200 Pascal <SEP> 4.4 <SEP> 16 <SEP> 3.5 <SEP> 3.5 <SEP> 10<tb> Water column (height in cm) at 10 cm pipe diameter <SEP> 18 <SEP> 15 <SEP >> 22 <SEP >> 22 <SEP >> 16
    权利要求:
    Claims (14)
    [1]
    1. A fabric for shading purposes, formed from interwoven warp and weft yarns based on fluoropolymer resins, wherein the warp and weft yarns are each formed of warp and weft threads, of which at least the warp threads are individually twisted in a first direction of rotation and at least the weft yarns comprising a plurality of weft threads which are twisted together and the warp and weft yarns are interwoven in cross-twill weave with a pitch of 4 to 14 to the fabric.
    [2]
    2. Fabric according to claim 1, characterized in that the warp and weft threads are formed of polytetrafluoroethylene.
    [3]
    A fabric according to claim 1 or 2, characterized in that the warp yarns are formed from a single warp yarn having a yarn density of 95 to 130 yarns / cm.
    [4]
    4. Fabric according to claim 1 or 2, characterized in that the warp yarns are formed of a plurality of twisted warp yarns of a yarn density of 20 to 65 yarns / cm.
    [5]
    5. Fabric according to one of claims 1 to 4, characterized in that the individual warp and weft threads have a thread thickness of 380 to 440 dtex.
    [6]
    6. A fabric according to any one of claims 1 to 5, characterized in that the weft threads are individually twisted in a first direction of rotation and are twisted together against the first direction of rotation.
    [7]
    7. A fabric according to any one of claims 1 to 6, characterized in that the individual warp and / or weft threads are twisted at 400 to 700 tours / m about their longitudinal axis in the first direction of rotation.
    [8]
    8. A fabric according to any one of claims 1 to 7, characterized in that for forming a warp multiple twisted individually in the first direction of warp warp threads are twisted together against the first direction of rotation.
    [9]
    9. fabric according to claim 8, characterized in that for forming a warp two or four individually twisted in the first direction of warp warp threads together with 30 to 40 tours / m are twisted against the first direction of rotation.
    [10]
    10. A fabric according to any one of claims 1 to 9, characterized in that the weft yarns have a yarn density of 35 to 70 yarns / cm.
    [11]
    11. A fabric according to any one of claims 1 to 10, characterized in that the weft threads are twisted together at 200 to 450 tours / m to the weft yarns.
    [12]
    12. A fabric according to any one of claims 1 to 11, characterized in that the warp yarns and n-weft yarns of warp or weft yarns of a first color are formed and the following m-weft yarns have at least one weft in a different color from the first color ,
    [13]
    13. A fabric according to claim 12, characterized in that n is an integer between 1 and 6 and m is an integer between 1 and 2.
    [14]
    14. A fabric according to any one of claims 1 to 13, characterized in that it has a tensile strength at 55 ° C in the direction of the warp and weft yarns of at least 5185 N / 5 cm.
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    同族专利:
    公开号 | 公开日
    CH706885A2|2014-03-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201220103389|DE202012103389U1|2011-12-20|2012-09-05|Tissue for shading purposes|
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