CN104620327B - 线束用保护材料及线束保护构件 - Google Patents

线束用保护材料及线束保护构件 Download PDF

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CN104620327B
CN104620327B CN201380046987.4A CN201380046987A CN104620327B CN 104620327 B CN104620327 B CN 104620327B CN 201380046987 A CN201380046987 A CN 201380046987A CN 104620327 B CN104620327 B CN 104620327B
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wire harness
woven fabrics
fibre
harness protection
fiber
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CN104620327A (zh
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高田裕
田中成幸
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0045—Cable-harnesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
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    • B32B7/04—Interconnection of layers
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
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    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
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    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0216—Two layers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • H02G3/0412—Heat or fire protective means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/00—Stock material or miscellaneous articles
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    • Y10T428/2915—Rod, strand, filament or fiber including textile, cloth or fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T442/659—Including an additional nonwoven fabric
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Details Of Indoor Wiring (AREA)
  • Nonwoven Fabrics (AREA)
  • Insulated Conductors (AREA)

Abstract

本发明提供胶粘性、成形性良好、线束保护构件的拉伸强度在高温下不易降低、耐热性优良的线束用保护材料、线束保护构件及线束。线束用保护材料(1)由层叠有至少两张无纺布的无纺布层叠体构成，所述无纺布层叠体具有以主体纤维作为主要成分且用于赋予强度的基材无纺布(2)和以具有热胶粘性的粘合纤维以作为主要成分且用于赋予热成形性的热胶粘性无纺布(3)。

Description

线束用保护材料及线束保护构件
技术领域
本发明涉及线束用保护材料、线束保护构件及线束。
背景技术
近年来，以汽车和电气产品为中心进行高性能化、高功能化。为了使汽车和电气产品等各种电子设备正确地工作，在汽车和电气产品等的内部布线中使用多根电线。通常，这些多根电线以线束的形态使用。
对于线束而言，将由多根电线构成的电线束预先组装成布线所需的形态。例如，线束通过在形成必要的分支并在其末端实施连接器安装等后在电线束的外周卷绕由带状、管状或片状等各种形状构成的线束保护构件而形成。
通常，使用聚对苯二甲酸乙二醇酯(PET)树脂短纤维而制作的无纺布在例如像过滤器、缓冲材料、车内片材、车内顶板材料等多种工业用途、汽车用途等中利用。本申请人等之前提出了使用无纺布作为线束用保护材料的线束保护构件以及线束(参考专利文献1)。
现有技术文献
专利文献
专利文献1：日本特开2010-267412号公报
发明内容
发明所要解决的问题
以往的使用短纤维无纺布的线束用保护材料混合有软化点低的粘合纤维，因此，在制成线束保护构件的情况下，容易在高温下软化、熔融，存在线束保护构件自身的拉伸强度降低的问题。
另外，需要增多要提高胶粘力的粘合纤维的含量，但粘合纤维增多时，存在耐热性降低的问题。
本发明是为了解决上述现有技术的问题，其目的在于提供胶粘性、成形性良好、线束保护构件的拉伸强度在高温下不易降低、耐热性优良的线束用保护材料、线束保护构件及线束。
用于解决问题的方法
为了解决上述问题，本发明的线束用保护材料为在线束保护构件的成形中使用的线束用保护材料，其主旨在于，
由层叠有至少两张无纺布的无纺布层叠体构成，
上述无纺布层叠体具有以主体纤维作为主要成分且用于赋予强度的基材无纺布和以具有热胶粘性的粘合纤维作为主要成分且用于赋予热成形性的热胶粘性无纺布。
上述线束用保护材料中，可以使上述基材无纺布的主体纤维为短纤维。
上述线束用保护材料中，可以使上述基材无纺布的主体纤维为长纤维。
上述线束用保护材料中，上述基材无纺布的主体纤维优选为选自由聚酯纤维、聚烯烃纤维、聚酰胺纤维、聚氯乙烯纤维、人造丝纤维、丙烯腈纤维、纤维素纤维、玻璃纤维组成的组中的任意一种。
上述线束用保护材料中，上述热胶粘性无纺布的粘合纤维优选为选自由低熔点聚酯纤维、聚烯烃纤维组成的组中的任意一种纤维。
本发明的线束保护构件的主旨在于，通过将上述线束用保护材料成形为预定的形状而得到。
本发明的线束为电线束的周围由通过将上述线束用保护材料成形为预定形状而得到的线束保护构件覆盖的线束，其主旨在于，以上述线束保护构件的上述基材无纺布为外侧的方式配置。
发明效果
本发明的线束用保护材料为在线束保护构件的成形中使用的线束用保护材料，由层叠有至少两张无纺布的无纺布层叠体构成，上述无纺布层叠体具有以主体纤维作为主要成分且用于赋予强度的基材无纺布和以具有热胶粘性的粘合纤维作为主要成分且用于赋予热成形性的热胶粘性无纺布，由此，与由包含粘合纤维的无纺布的单一层构成的以往的线束用保护材料相比，以利用基材无纺布使其具有整体的强度、耐热性并利用热胶粘性纤维赋予热成形性的方式对各无纺布层划分功能，由此，能够在整体上减少粘合纤维，能够在不降低胶粘性、成形性的情况下得到耐热性优良的线束保护构件及线束。
对于本发明的线束而言，电线束的周围利用由上述线束保护材料成形的线束保护构件覆盖，能够利用位于线束保护构件的外侧的基材无纺布发挥保护性能，并且，能够利用内侧的热胶粘性无纺布得到与电线束的胶粘性、线束保护构件的良好的胶粘。另外，由于是热胶粘性无纺布没有露出到外侧的状态，因此，利用通过加热熔融后的粘合纤维的树脂，也不会存在表面发粘的不良情况。
本发明的线束保护构件通过将上述线束用保护材料成形为预定的形状而得到，可以用于形成上述线束。
附图说明
图1是表示本发明的线束用保护材料的一例的截面图。
图2是表示本发明的线束的一例的截面图。
图3是表示本发明的线束保护构件和线束的其他例的外观立体图。
具体实施方式
以下，使用附图对本发明的实施方式详细地进行说明。图1是表示本发明的线束用保护材料的一例的截面图。如图1所示，本发明的线束用保护材料1在线束保护构件的成形中使用，由层叠有基材无纺布2和热胶粘性无纺布3这两张无纺布的无纺布层叠体构成。两张无纺布2、3通过针刺法而层叠一体化。
基材无纺布2在以主体纤维作为主要成分而形成线束保护构件的情况下作为芯材而用于赋予强度。主体纤维可以使用例如单纤维、长纤维中的任意一种。另外，基材无纺布2含有50质量％以上的主体纤维即可，也可以混合粘合纤维(详细情况如后所述)等其他纤维。
上述主体纤维的纤维直径优选为1～40dt。另外，上述粘合纤维的纤维直径优选为1～40dt。
作为基材无纺布2的主体纤维的种类，可以列举：聚酯纤维、聚烯烃纤维、聚酰胺纤维、聚氯乙烯纤维、人造丝纤维、丙烯腈纤维、纤维素纤维、玻璃纤维等。这些纤维可以单独使用一种，也可以混合多种。
作为基材无纺布2的主体纤维，在使用短纤维的情况下，优选为纤维长度为30～120mm的纤维。纤维的形状没有特别限定，可以使用芯鞘型、圆筒型、中空型、并列型、通常的圆形截面纤维、以及异形截面纤维。
基材无纺布2优选使用基重为100～2500g/m2、厚度为0.1～30mm的无纺布。在使用短纤维的情况下，基材无纺布2可以通过针刺法等制造。另外，在使用长纤维的情况下，基材无纺布2可以通过纺粘法等制造。
在使用长纤维无纺布作为主体纤维的情况下，与短纤维无纺布相比，拉伸强度等变大，因此，具有能够对线束保护构件赋予强固的物性的优点。另外，长纤维无纺布不能与粘合纤维等其他纤维进行混棉，因此，利用单层的无纺布的构成无法赋予成形性。通过与热胶粘性无纺布3层叠，能够使其具有热成形性。
热胶粘性无纺布3以具有热胶粘性的粘合纤维作为主要成分且用于对线束用保护材料1赋予热成形性。热胶粘性无纺布3含有50质量％以上的粘合纤维即可，也可以含有上述主体纤维等中例示的其他纤维。为了赋予热成形性，热胶粘性纤维的粘合纤维使用相对于基材无纺布2的主体纤维为低熔点(软化点)的树脂纤维。粘合纤维的软化点优选为200℃以下。
上述热成形性是指具有能够通过加热而成形为预定的形状的热塑性。通过使用具有热成形性的无纺布，能够容易地由线束用保护材料形成为预定形状的线束保护构件。
上述粘合纤维可以列举例如：低熔点聚酯纤维或聚烯烃纤维。上述粘合纤维可以单独使用，也可以混合使用。
上述粘合纤维可以使用具有将芯部分的纤维用鞘部分的粘合层覆盖而得到的芯鞘结构的纤维。芯鞘结构的粘合纤维使用软化温度比芯部分的纤维低的低熔点树脂作为粘合层的树脂。
芯鞘结构的粘合纤维可以列举例如：芯部分使用聚对苯二甲酸乙二醇酯(PET)树脂纤维、使用聚间苯二甲酸乙二醇酯(PEI)与PET的共聚物作为粘合层的树脂的低熔点聚酯纤维；芯部分使用PET纤维、使用聚乙烯树脂、聚丙烯树脂等聚烯烃类树脂等作为粘合层的树脂的聚烯烃纤维。
热胶粘性无纺布3优选使用基重为100～2000g/m2、厚度为0.1～30mm的无纺布。另外，上述纤维可以使用纤维直径为1～40dt、纤维长度为30～120mm的单纤维。纤维形状可以列举：圆筒型、中空型、并列型、芯鞘型等。另外，纤维可以使用纤维形状不同的异形截面纤维。
上述两张无纺布的层叠中，除了针刺法以外，还可以使用压延法、超声波胶粘法等方法进行层叠。
图2是表示本发明的线束的一例的截面图。如图2所示，线束4通过将使多根电线5成束的电线束的周围利用由上述线束用保护材料成形的线束保护构件6覆盖而得到。电线5通过将芯线51的周围利用绝缘体52覆盖而得到。
图2所示的线束4通过下述的制造方法得到。将线束用保护材料1在电线束的周围卷绕，使端部重叠，形成端部重叠的状态。然后，在保持其形状的状态下，将整体加热至热胶粘性无纺布的粘合树脂的能够成形的温度。保持预定的温度、时间后，进行冷却，由此固定为预定的形状。
图2所示的线束4中，以线束用保护材料1的热胶粘性无纺布3为内侧(电线5侧)、基材无纺布2为外侧的方式覆盖在电线束的周围。热胶粘性无纺布3没有露出到外侧，因此，即使热胶粘性无纺布3的粘合纤维通过加热而熔融，也能够避免外表面发粘等不良情况。
图3是表示本发明的线束保护构件和线束的其他例的外观立体图。图3所示的线束4使用通过将由上述无纺布构成的线束用保护材料1预先利用加热加压等成形方法成形为预定形状而得到的线束保护构件6。线束保护构件6成形为截面为半圆的凹槽状，在两端部形成有平板状的接合部6a、6a。线束保护构件6以基材无纺布4为外侧、热胶粘性无纺布3为内侧的方式使用线束用保护材料1。
图3所示的线束4使用两个线束保护构件6、6。线束4以覆盖由多根电线5构成的电线束的周围的方式配置线束保护构件6、6，使接合部6a之间接触。然后，可以对整体进行加热、加压，使线束保护构件6、6的热胶粘性无纺布之间胶粘而一体化。
另外，图3所示的线束4也可以通过下述的方法制造。例如，使用二分为上下的由上模和下模构成的预定的成形模具，在各成形模具中以相对的方式配置线束用保护材料1，进行合模，在两张上述无纺布1、1夹持电线束4的状态下加热至预定的温度，进行成形。成形时，使突出到无纺布1、1的电线束4的外侧的接合部6a的部分胶粘而一体化。
本发明的线束用保护材料及线束保护构件可以用于汽车用线束等的制造，特别是可以适合作为在发动机室等这样的要求耐热性的部位中使用的线束。
以下，示出本发明的实施例。
[实施例1-1～1-4]
如表1所示，作为基材无纺布，单独使用PET短纤维或者使用PET短纤维与粘合纤维的混合纤维，设定为表1所示的配合比例，作为热胶粘性纤维，使用PET短纤维与粘合纤维的混合纤维，将基材无纺布与热胶粘性无纺布贴合，得到实施例1-1～1-4的由层叠无纺布构成的线束用保护材料。无纺布的制作中，通过针刺法将上述混合纤维层叠，使其基重为300g/m2、厚度为4mm。使用所得到的层叠无纺布，对拉伸强度、高温拉伸强度、剥离胶粘强度、成形性进行试验。将试验结果一起示于表1。另外，表1所示的各纤维的细节和试验条件如下所述。
[关于无纺布中使用的纤维]
(a)PET短纤维：聚对苯二甲酸乙二醇酯短纤维(6.6dt×51mm)
(b)粘合纤维：粘合层为聚间苯二甲酸乙二醇酯(PEI)的共聚物、软化点110℃、芯材为聚对苯二甲酸乙二醇酯(PET)、软化点255℃的芯鞘型短纤维(6.6dt×51mm)。
(c)PET长纤维：聚对苯二甲酸乙二醇酯长纤维(4.4dt)
[拉伸强度]
基于JIS K 6252对层叠无纺布进行拉伸试验，测定拉伸强度。
[高温拉伸强度]
在80℃的高温环境下，在与上述拉伸强度同样的条件下进行拉伸试验。
[剥离胶粘强度]
将层叠无纺布基于JIS K 6854制作试验片，进行T型剥离试验，测定剥离胶粘强度。在拉伸速度为100mm/分钟的条件下进行。
[成形性]
将两张层叠无纺布在200℃下贴合，加压成片状，制作加压成形品。目视观察该加压成形品，将不能在表面确认到褶皱、剥离、灼痕等成形不良的情况记作合格(○)，将除此以外记作不合格(×)。
[比较例1]
为了进行比较，与实施例同样地对实施例1-4的仅基材无纺布的物性进行评价。将评价结果一起示于表1。
[比较例2]
为了进行比较，与实施例同样地对实施例1-4的仅热胶粘性无纺布的物性进行评价。将评价结果一起示于表1。
表1
如表1所示，仅由基材无纺布构成的比较例1的成形性不充分，拉伸强度、高温拉伸强度、剥离胶粘强度与实施例1-1～1-4相比均大幅降低。另外，仅由热胶粘性无纺布构成的比较例2的高温拉伸强度与初期的拉伸强度相比大幅降低，得到了耐热性低的结果。相对于此，实施例1-1～1-4的高温胶粘强度均比比较例1、2更良好。
[实施例2-1～2-4]
如表2所示，使用PET长纤维无纺布作为基材无纺布，使用与实施例1-1中使用的热胶粘性无纺布相同的无纺布，与实施例1-1同样操作，制作层叠无纺布。实施例2-1～2-4中，使PET长纤维的基重(g/m2)变化为50、100、200、300。使用实施例2-1～2-4的层叠无纺布，与表1的实施例1-1～1-4同样地，对拉伸强度、高温拉伸强度、剥离胶粘强度、成形性进行试验。将试验结果一起示于表2。
[比较例3]
为了进行比较，对实施例2-1～2-4中使用的仅基材无纺布的物性进行评价。将评价结果一起示于表2。
表2
如表2所示，实施例2-1～2～4的拉伸强度、高温拉伸强度、剥离胶粘强度均良好。特别是，基材无纺布的基重为100(g/m2)以上的实施例2-2～2-4与使用短纤维无纺布的实施例1-1相比，具备5倍以上的拉伸强度。
比较例3仅由长纤维无纺布构成，因此，拉伸强度、高温拉伸强度均良好，但由于不具有胶粘性无纺布，因此，两张无纺布几乎没有胶粘，因而，剥离胶粘强度不良。相对于此，实施例2-1～2-4的剥离胶粘强度良好。
以上，对本发明的实施例详细进行了说明，但本发明不受上述实施例的任何限定，在不脱离本发明的主旨的范围内可以进行各种改变。
例如，上述实施例的线束保护材料由两张无纺布的层叠体构成，但本发明的线束用保护材料也可以使用多张基材无纺布或热胶粘性无纺布而由三张以上的无纺布的层叠体构成。

Claims (5)

1.一种线束用保护材料，其为在线束保护构件的成形中使用的线束用保护材料，其特征在于，
由层叠有至少两张无纺布的无纺布层叠体构成，
所述无纺布层叠体具有以主体纤维作为主要成分且用于赋予强度的基材无纺布和以具有热胶粘性的粘合纤维作为主要成分且用于赋予热成形性的热胶粘性无纺布，
所述基材无纺布的基重为100～2500g/m2，
所述基材无纺布的主体纤维为长纤维，
粘合纤维相对于基材无纺布的主体纤维为低熔点。
2.如权利要求1所述的线束用保护材料，其特征在于，所述基材无纺布的主体纤维为选自聚酯纤维、聚烯烃纤维、聚酰胺纤维、聚氯乙烯纤维、人造丝纤维、丙烯腈纤维、纤维素纤维、玻璃纤维中的任意一种。
3.如权利要求1或2所述的线束用保护材料，其特征在于，所述热胶粘性无纺布的粘合纤维为选自低熔点聚酯纤维、聚烯烃纤维中的任意一种纤维。
4.一种线束保护构件，其特征在于，通过将权利要求1～3中任一项所述的线束用保护材料成形为预定的形状而得到。
5.一种线束，其为电线束的周围由通过将权利要求1～3中任一项所述的线束用保护材料成形为预定形状而得到的线束保护构件覆盖的线束，其特征在于，
以所述线束保护构件的所述基材无纺布为外侧的方式配置。
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