CN106795992A - 管道衬套 - Google Patents

管道衬套 Download PDF

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Publication number
CN106795992A
CN106795992A CN201580046309.7A CN201580046309A CN106795992A CN 106795992 A CN106795992 A CN 106795992A CN 201580046309 A CN201580046309 A CN 201580046309A CN 106795992 A CN106795992 A CN 106795992A
Authority
CN
China
Prior art keywords
mask
insulating barrier
face
pipe liner
fibrous glass
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.)
Pending
Application number
CN201580046309.7A
Other languages
English (en)
Inventor
J·M·帕克斯
J·T·查科
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.)
Owens Corning Intellectual Capital LLC
Original Assignee
Owens Corning Intellectual Capital LLC
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 Owens Corning Intellectual Capital LLC filed Critical Owens Corning Intellectual Capital LLC
Publication of CN106795992A publication Critical patent/CN106795992A/zh
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B37/1027—Pressing using at least one press band
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    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
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Abstract

一种按卷设置的管道衬套，包括：具有第一面对表面和与第一面对表面相反并间隔开的第二面对表面的绝缘层、和纤维玻璃毡式护面，纤维玻璃毡式护面设置在第一面对表面上以使得第一面对表面的大部分被所述护面覆盖住，其中纤维玻璃毡式护面未设置在第二面对表面上，并且其中所述管道衬套被卷成使得所述纤维玻璃毡和第一面对表面在第二面对表面的径向外侧。

Description

管道衬套
技术领域
本申请总体涉及管道，并且更具体地涉及提高管道的声学和/或热性能的管道衬套。
发明背景
管道和管路被用于在建筑物供暖、通风和空调(HVAC)系统中输送空气。常常这些管道是由金属薄板形成的并且结果不拥有良好的热或者声性能。为了提高这些性能，管道被衬以柔性或者刚性隔热和隔音材料。用于空调系统的管道绝缘一般包括附着至绝缘层的护面层。所述绝缘层常常是由玻璃纤维制成的。所述护面材料一般通过粘合剂被附连到绝缘层上。
附图说明
本发明的特征和优点对于发明所属领域的普通技术人员根据读取以下说明并结合附图将是显而易见的，其中：
图1是管道衬套的示例性实施例的透视图；
图2是用于生产图1的管道衬套的生产线的示例性实施例的示意图；
图3是被卷成卷的图1的管道衬套的透视图；
图4是当被弯曲以形成卷时图1的管道衬套的侧视图的示意图；和
图5是具有被固定到管道壳体上的图1的管道衬套的管道组件的示例性实施例的剖视图。
具体实施方式
如本文所述，当一个或多个部件被描述成连接、结合、附连、联接、附接或者互连时，所述互连可以是部件之间的直接互连、或者可以是通过使用一个或多个中间部件的间接互连。还如本文所述，对“构件”、“部件”或者“部分”的描述将不限于单个结构构件、部件或者元件，而可能包括部件、构件或者元件的组合件。本文使用的“物理连通”包括但不限于两个或更多个部件、元件、组件、部分或者零件的连接、附连、结合、附接、安装、固定、接触放置。两个或多个部件等之间的物理连通可以是诸如通过使用一个或多个中间部件的直接或者间接物理连通，并可以是间断的或者连续的。
在本文所述的实施例中，本申请的绝缘装置被描述成与空气管道一起使用。然而，本申请的绝缘装置可以多种不同应用的方式进行使用。本专利申请提供了绝缘装置和管道组件的实施例。来自每一实施例的任何一种特征或者特征的组合可供给其他实施例的特征或者特征的组合一起使用。
图1示出了管道衬套100的示例性实施例。所示管道衬套100包括绝缘层102和护面104。绝缘层102可采用多种不同形式。在所示实施例中，绝缘层102是具有前边缘106、后边缘108、宽度W1和长度L1的矩形。然而，绝缘层102可具有任何形状以适应管道衬套100的期望应用场合。
所示绝缘层102包括第一侧边缘表面110和与第一侧边缘表面间隔开的第二侧边缘表面112。第一面对表面114从第一侧边缘表面110延伸至第二侧边缘表面112。第二面对表面116与第一面对表面114相反并间隔开，并且也从第一侧边缘表面110延伸至第二侧边缘表面112。
绝缘层102可由多种不同材料制成并且可采用多种不同形式。在示例性实施例中，绝缘层102是柔性的，从而允许折叠、卷起或者操纵管道衬套100。在一个示例性实施例中，绝缘层102是由纤维材料制成的。例如，绝缘层102可包括玻璃纤维绝缘件，诸如玻璃纤维结合毯、诸如可以从Owens Corning中获得的旋转管道衬套中所用的毯子。绝缘层102可由玻璃纤维构造，以使得管道衬套100符合用于隔热和隔音(玻璃纤维的风道衬套材料)的标准技术规范ASTM C 1071的物理性能需求。
可制造绝缘层102的材料的实例包括但不限于：无纺玻璃纤维和聚合物介质、纺织玻璃纤维和聚合物介质、泡沫材料，包括泡沫塑料和泡沫橡胶、蜂窝状复合材料、矿物棉、岩棉、陶瓷纤维、玻璃纤维、气凝胶、蛭石、硅酸钙、玻璃纤维矩阵、聚合物纤维、合成纤维、天然纤维、复合材料预成型、纤维素、木材、布、织物和塑料。绝缘层102可以是耐火的、可包括抗菌材料和/或可由55％以上的再循环材料制造。如本申请中使用的，术语“天然纤维”意味着是指从植物的任何部分(包括但不限于，茎、种子、叶子、根或者内皮)提取的植物纤维。绝缘层102可由有机纤维(诸如，人造纤维、聚乙烯、聚丙烯、尼龙、聚酯纤维及其混合物)形成。连续纤维和/或多组分纤维(诸如双组分或者三组分聚合物纤维)也可被用于形成绝缘层102。双组分纤维可被形成为皮芯结构，其中所述皮是由实质上包围由第二种聚合物纤维形成的芯的第一种聚合物纤维形成的。绝缘层102可以是由传统的干法工艺形成的非织造网，或者绝缘层可以是点粘结织物，并且可以使用诸如针织、纺粘或者熔喷无纺网的其他非纺织材料。粘结剂、阻燃剂、色料和/或其他传统的添加物也可被包含在绝缘层102中。选择性地，在制造期间或之后可利用除霉剂和/或杀菌剂来处理绝缘层102。类似地，可以将无水薄膜式粘合剂热粘结至绝缘层102并且随后施加至纤维绝缘产品。绝缘层102可以由提供本申请所需的隔热和/或隔音特性的任何一种材料形成。
当绝缘层102是由玻璃纤维制成时，所述绝缘层可由缠结的玻璃纤维形成，所述缠结的玻璃纤维由固化的热固性聚合物材料粘合到一起。可通过使熔化的玻璃纤维化并且迅即在移动式输送带上形成玻璃纤维毡，来按连续化工序进行玻璃纤维绝缘产品的制造。玻璃可在槽(未显示)中熔化并且被提供给诸如纤维旋抛机的纤维形成装置。在Aubourg的美国专利US6,527,014；Xu等的美国专利US5,932,499；Mattison的美国专利US5,523,264；和Porter的美国专利US5,055,428中描述了可以在本发明中使用的玻璃纤维的非限制性实例，其内容以其整体通过引用被清楚地并入。所述玻璃纤维被利用水性粘结剂合成物喷涂。可使用诸如苯酚甲醛和尿素甲醛的任何一种传统粘结剂，但是期望粘结剂是低甲醛的粘结剂合成物，诸如，聚羧酸基粘结剂、聚丙烯酸甘油(PAG)粘结剂或者聚丙烯酸三乙醇胺(PAT粘结剂)。供本发明使用的合适的羧基粘结剂合成物包括羧基聚合物、交联剂和选择性的催化剂。所述粘结剂与旋转玻璃纤维绝缘层结合使用是众所周知的。在Straus的美国专利US5,318,990；Straus等的美国专利US5,340,868；Arkens等的美国专利US5,661,213；Chen等的美国US6,274,661；Chen等的美国专利US6,699,945；和Chen等的美国专利US 6,884,849中找到了所述粘结剂技术的实例，其中每一个通过整体地引用清楚地并入。粘结剂按总产品的重量计可存在大约2％到大约25％的量，并且按总产品的重量计优选大约5％到大约20％并且按总产品的重量计最优选大约10％到大约18％。
护面104设置在绝缘层102的第一面对表面114上。护面104可采用多种不同的形式。护面104可是单片材料、或者多个不同的材料片或者材料板，并且可包括单层或者多层材料。在图1的示例性实施例中，护面104是单片材料，所述材料片被设置在第一面对表面114上，以使得所述护面基本上覆盖住整个第一面对表面。
护面104可由多种不同的材料制成。可使用适于管道衬套的任何一种材料。当管道衬套100被卷起时，优选的材料给绝缘层提供支撑、使绝缘层102与通过管道的气流隔离、提供足够的抗撕裂性和紧固件的抗拉性、减小气流阻力(与裸露的绝缘层102的气流阻力相比)、并且提供消音。例如，护面104可包括无纺的玻璃纤维和聚合物介质、纺织的玻璃纤维和聚合物介质、护套材料，诸如，由聚合物材料制成的护套薄膜、纱布、布、织物和玻璃纤维增强的牛皮纸(FRK)。护面104可以是黑色的、高密度的、耐久的玻璃纤维板式护面，所述玻璃纤维板式护面被用在可从Owens Corning获得的的旋转管道衬套或者的纺织物管道衬套上。护面104可以是耐火的、可提供可清洁表面、可包括抗菌材料、和/或可以是由超过55％的再循环料制成的。
在一个示例性实施例中，护面适用于纤维绝缘产品。适用于纤维绝缘产品的护面材料包括但不限于：无纺毡、网或者幔。护面104可包括附着至其上的无水薄膜式粘合剂。护面104可包括纤维质基料和粘附到所述纤维质基料的主表面上的无水薄膜式粘合剂。纤维质基料可以是由诸如但不限于玻璃纤维、矿物棉、岩棉、聚合物纤维、合成纤维和/或天然纤维的纤维形成的。如本申请中使用的，术语“天然纤维”意味着是指从植物的任何部分(包括但不限于，茎、种子、叶子、根或者内皮)提取的植物纤维。期望的是，所述纤维质基料是由诸如人造纤维、聚乙烯、聚丙烯、尼龙、聚酯及其混合物的有机纤维形成的。连续纤维和/或多组分纤维(诸如双组分或者三组分聚合纤维)也可被用于形成护面104。双组分纤维可被形成为皮芯结构，其中所述皮是由实质上包围由第二种聚合纤维形成的芯的第一种聚合纤维形成的。虽然护面104优选是由传统的干法工艺形成的非织造网，但是可以使用诸如点粘结纺织的其他材料及其他非纺织材料，诸如针织、纺粘或者熔喷的无纺的网。
粘结剂、阻燃剂、色料和/或其他传统的添加剂也可被包含在护面104中。可以使用任何一种合适的粘结剂或者粘结剂的组合，包括热塑性粘结剂和热固性粘结剂。示例性的热塑性聚合物包括聚乙烯、聚对苯二甲酸乙二醇酯(PET)、聚丙烯或者聚苯硫(PPS)、尼龙、聚碳酸酯、聚苯乙烯、聚酰胺、聚烯烃和聚丙烯酸酯的某些共聚物。示例性的热固性粘结剂包括苯酚/甲醛和无甲醛的粘结剂体系。示例性的无甲醛的粘结剂体系包括聚丙烯酸和多元醇聚合物和由复合营养素(诸如，碳水化合物、蛋白质和脂肪，其具有许多反应性功能)制成的“天然”粘结剂。在一个示例性实施例中，粘结剂包括Owens-Corning的EcoTouchTM或者EcoPureTM粘结剂。
选择性地，在制造期间或之后，可利用灭霉剂和/或杀菌剂来处理护面104。类似地，可以将无水薄膜式粘合剂热粘合至护面并且随后施加于纤维绝缘产品。在一个示例性实施例中，护面104是一种由玻璃纤维和丙烯酸粘结剂形成的非织造垫。在另一示例性实施例中，护面104可以是Nagarajan等的已公开的美国专利申请US2013/0291990中所描述的护面材料，其内容通过引用按总体地清楚并入。
护面104可被按多种不同的方式设置在绝缘层102上。在一个示例性实施例中，护面104被附着到绝缘层102上。护面104可以被按多种不同的方式附着到绝缘层102上。例如，护面104可以利用粘合剂、通过超声波焊接被附着到绝缘层102上，或者护面可以通过机械式紧固件被固定到绝缘层上。多种不同的粘合剂可以被用于将护面104附着到绝缘层102上。例如，所述粘合剂可以是水基粘合剂、单组分粘合剂、两组分粘合剂、粉末粘合剂、热熔性粘合剂、薄膜式粘合剂、诸如无甲醛粘结剂的粘结剂和纺粘热熔胶网。纺粘热熔胶网可从俄亥俄州的Cuyahoga Falls的Spunfab处获得。所述粘合剂可按多种不同的方式施加。所述粘合剂可例如通过喷涂、滚压、刷拂等被施加于绝缘层102和/或护面104。当使用粘结剂时，粘结剂可以是绝缘层102和/或护面104的一部分，并且粘结剂的固化将绝缘层102附着至护面104。
在一个示例性实施例中，粘合剂是无水薄膜式粘合剂，诸如遇热活化的热塑胶。在示例性实施例中，所述无水薄膜式粘合剂具有小于或等于大约60微米、从大约6.0到大约30.0微米、或者从大约10微米到大约15微米的厚度。所述无水薄膜式粘合剂经由热的应用被施加于护面104。例如，所述无水薄膜式粘合剂可被定位到护面104上，并且随后通过利用加热板或者其他合适的加热装置(例如，炉子)加热护面材料而被附着到护面上。类似地，可通过将护面和绝缘层加热到无水薄膜式粘合剂的熔点温度或以上达足以将护面附着至绝缘层的时间，来将护面104附着到绝缘层102上。合适的粘合剂的非限制性实例包括乙烯共聚物、聚氨基甲酸酯、乙烯-乙酸乙烯共聚物(EVA)、无定形聚烯烃、聚乙烯、低密度聚乙烯(LDPE)、玻璃纸、聚对苯二甲酸乙二醇酯(PETP)、聚氯乙烯(PVC)尼龙、聚丙烯、聚苯乙烯、聚酰胺和醋酸纤维素。
可使用多种机械式固定装置将护面104固定到绝缘层102上。所述机械式固定装置可与粘合剂、超声波焊接和/或其他连结种类结合使用或作为其替代。可用于将护面104连接至绝缘层102的机械式固定装置的实例包括但不限于：销连接、针连接、缝合和夹紧或者摩擦式紧固件。可使用允许护面104被附接至绝缘层102的任何一种紧固件。
绝缘层102和护面104的厚度可变化。在一些示例性实施例中，取决于应用场合和期望的热效率，绝缘层102可为大约13毫米到大约51毫米厚，并且护面104可为大约0.40毫米到大约0.70毫米厚。然而。在其他实施例，绝缘层可比13毫米薄或者比51毫米厚，并且护面104可比0.40毫米薄或者比0.70毫米厚。
图2示出了用于制造管道衬套100的纤维绝缘件的生产线200的示例性实施例。生产线200包括形成玻璃纤维204的纤维旋抛机，所述纤维旋抛机大致向下吹以将玻璃纤维定位在成型室206内部的护面104上。在一示例性实施例中，玻璃纤维当仍是热的时被用水状粘结剂合成物喷涂。附着有未固化树脂粘结剂的玻璃纤维204可以被收集并形成环形成型传送带210的刮刀102上的未固化包208。可包括导向件(未显示)以限定包208的侧面，并且可沿由图2所示的线的任一点包括导向件，或者可在限定绝缘层102的宽度处可添加站点。护面104可具有预先施加的无水粘合剂，所述无水粘合剂设置在施加玻璃纤维204的一侧上。该粘合剂可被施加于护面的整个表面或者仅被施加于落有玻璃纤维的那部分。护面可由辊子212供给至传送带210。
粘合剂被设置在绝缘层102和/或护面104上，和/或绝缘层的粘结剂可被用来将绝缘层102粘附到护面104上。包208和护面104被加热，诸如，通过将包输送通过固化炉214，在固化炉处热空气吹过绝缘包208和护面104以蒸发掉粘结剂中的任何残留水、固化粘结剂和粘合剂、使绝缘包208中的纤维刚性地结合到一起、并且将护面104粘附到绝缘包208。
管道衬套100离开固化炉214并且被引向卷起装置216。管道衬套100的柔性允许其卷到卷形物220上以用于贮存和分配(参见图2和3)，并随后被展开和切割或者冲压以形成可被安装在金属管道组件500中的部段(参见图5)。
参见图3，当管道衬套100被卷起时，每一绝缘层102具有内侧302和外侧304。管道衬套100被卷成使得护面104被定位成绝缘层102的外侧304，以为绝缘层提供增强作用。当管道衬套100被卷成卷220时，护面104在绝缘层102的外侧304上的定位防止绝缘层102的叠盖。
参见图4，当管道衬套100被弯曲成卷220时，在绝缘层102的外侧部分404中产生拉伸应力402，而同时在内部部分408中产生压缩应力406。对于粘结的玻璃纤维绝缘件来说在整个绝缘层102上密度方面具有一些变化是常见的。因此，绝缘层102的一些部分比其他部分具有更高的密度和重量。在卷起的绝缘层的外侧没有护面104的情况中，管道衬套100卷起时产生的应力可能在较低密度和较轻重量区域中的绝缘层内部引起撕裂或者分离。绝缘件在或邻近外侧304的撕裂和分离对绝缘产生了损害，并且形成了被称为叠盖作用的松散端或者“卷边”。如果比绝缘层102更硬的护面410(由图4中的虚线示出)施加于内侧302，则可能加剧叠盖。内侧护面410能够折叠或者弄皱，这由于压缩绝缘层102而增大了外侧304中的应力。除了内侧护面410折叠产生的增大应力之外，内侧护面410中的皱褶或者皱纹在管道衬套100展开后可残存。
图5示出了绝缘的管道组件500的示例性实施例。所述绝缘的管道组件500包括固定至管道壳体502的管道衬套100。所示管道壳体502包括内表面504和外表面506且管道衬套100固定至内表面，以使得绝缘层102被夹在内表面和护面104之间。如此，护面104将绝缘层102与通过管道壳体502的气流隔离开。
管道组件500可具有多种不同的构造。在图5中所示的示例性实施例中，壳体502在横截面中具有矩形形状。然而，壳体可具有任何一种形状。在图5中所示的实例中，单片管道衬套100被用于隔离开管道壳体502的整个内表面504。然而，管道衬套的宽度W1可被选择成适应多种不同的应用场合。例如，宽度W1可相当于管道壳体502的长度L2，以使得管道衬套100被按相当于管道的内部周长的长度L1进行切割。在另一实施例中，管道衬套100的宽度W1可相当于管道或者管道一半的内部周长，以使得管道衬套100被按相当于管道壳体502的长度L2的长度L1进行切割。
管道衬套100可按多种方式被固定到管道壳体502上。例如，在图5的示例性实施例中，管道衬套100通过紧固件510被固定到管道壳体502上。所述紧固件510可采用多种不同的形式。例如，如现有技术中已知的，紧固件510可包括被附接至管道壳体的销钉，且所述销钉的头部连接至销钉的端部。所述头部牢固保持管道衬套100抵靠管道壳体502并且被附接至销钉，所述销钉被撞击驱入管道壳体以形成至管道壳体的正机械附接。在另一实施例中，头部1002被附接至撞击焊接(诸如通过电阻焊接或者电容焊接)到管道壳体中的销钉上。可使用能将管道衬套100充分固定至管道壳体502的任何一种系统。
虽然已经通过发明的实施例的描述阐明了本发明，但是，申请人的意图不是将所附权利要求的范围限制或者以任何方式限定于所述细节。附加的优点和改进对所属领域的技术人员来说是显而易见的。更进一步，虽然本文已经显示并描述了矩形的构件，但是还可以使用包括椭圆形、多边形(例如，正方形、三角形、六边形等)及其他形状的其他几何形状。因此，按其更宽广的视角，发明不限于具体细节、代表性设备和所显示并描述的说明性实例。因此，在不脱离申请人的总发明构思的精神或者范围的情况下可偏离所述详述。

Claims (15)

1.一种按卷设置的管道衬套，包括：
绝缘层，所述绝缘层具有第一面对表面和与所述第一面对表面相反并间隔开的第二面对表面；和
纤维玻璃毡式护面,所述纤维玻璃毡式护面设置在所述第一面对表面上，以使得所述第一面对表面的大部分被所述护面覆盖住，
其中所述纤维玻璃毡式护面未设置在所述第二面对表面上，和
其中所述管道衬套被卷成使得所述纤维玻璃毡和第一面对表面在所述第二面对表面的径向外侧。
2.根据权利要求1所述的管道衬套，其中所述纤维玻璃毡式护面基本上覆盖住整个所述第一面对表面。
3.根据权利要求1所述的管道衬套，其中所述绝缘层是由纤维材料制成的。
4.根据权利要求1所述的管道衬套，其中所述护面利用粘合剂被粘附到所述绝缘层上。
5.根据权利要求1所述的管道衬套，其中所述粘合剂是遇热激活的无水薄膜式热塑粘合剂。
6.根据权利要求4所述的管道衬套，其中所述护面通过机械式紧固件被附接到所述绝缘层上。
7.根据权利要求1所述的管道衬套，其中所述护面是单片材料。
8.根据权利要求1所述的管道衬套，其中所述护面是利用玻璃纤维和丙烯酸粘结剂所形成的非织造垫。
9.根据权利要求8所述的管道衬套，其中所述护面具有大约0.5毫米的厚度。
10.一种制造管道衬套的方法，包括：
提供绝缘层，所述绝缘层具有第一面对表面和与所述第一面对表面相反并间隔开的第二面对表面；
在所述第一面对表面上设置纤维玻璃毡式护面，其中没有纤维玻璃毡式护面设置在所述第二面对表面上；
将所述绝缘层和纤维玻璃毡式护面一起卷成卷，以使得所述纤维玻璃毡和第一面对表面在所述第二面对表面的径向外侧。
11.根据权利要求10所述的方法，其中第一面对表面被所述护面完全覆盖。
12.根据权利要求10所述的方法，其中所述绝缘层是由纤维材料制成的。
13.根据权利要求10所述的方法，其中所述护面是利用玻璃纤维和丙烯酸粘结剂所形成的非织造垫。
14.根据权利要求10所述的方法，还包括利用粘合剂将所述护面粘附到所述绝缘层上。
15.根据权利要求14所述的方法，其中所述粘合剂是遇热激活的无水薄膜式热塑粘合剂。
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