CN104364077A - 管的聚合泡沫绝缘系统 - Google Patents
管的聚合泡沫绝缘系统 Download PDFInfo
- Publication number
- CN104364077A CN104364077A CN201380029865.4A CN201380029865A CN104364077A CN 104364077 A CN104364077 A CN 104364077A CN 201380029865 A CN201380029865 A CN 201380029865A CN 104364077 A CN104364077 A CN 104364077A
- Authority
- CN
- China
- Prior art keywords
- foam
- barrier material
- insulation system
- thermoplastic polymer
- pipe insulation
- 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.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 161
- 238000009413 insulation Methods 0.000 title claims abstract description 96
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 103
- 239000000463 material Substances 0.000 claims abstract description 101
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- 229920000642 polymer Polymers 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 37
- 229910052751 metal Inorganic materials 0.000 claims description 37
- 238000012360 testing method Methods 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 16
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- 239000004795 extruded polystyrene foam Substances 0.000 claims description 12
- 239000005030 aluminium foil Substances 0.000 claims description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 239000011494 foam glass Substances 0.000 claims description 7
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- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 4
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- 229920000307 polymer substrate Polymers 0.000 description 3
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- 229920005604 random copolymer Polymers 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 1
- 241001466460 Alveolata Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical class [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
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- 150000001336 alkenes Chemical class 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- 239000011230 binding agent Substances 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Chemical class 0.000 description 1
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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Abstract
管绝缘系统,其用作管段的绝缘,所述系统包含:在所述管段周围沿圆周安装的热塑性聚合物泡沫节段,在所述管段周围沿圆周安装并紧靠相邻的热塑性泡沫节段的熔体阻挡材料环,在所述热塑性聚合物泡沫节段和熔体阻挡材料环周围的网,封闭所述热塑性聚合物泡沫、熔体阻挡材料和网的金属覆盖物;和支撑带,其沿圆周安装在所述金属覆盖物周围并且将所述管绝缘系统固定靠在其周围存在所述管绝缘的管段。熔体阻挡材料环存在于非水平管段的顶部和底部并在沿着所述管段的任何250厘米距离内。
Description
技术领域
本发明涉及管的聚合泡沫绝缘系统。
背景技术
2012年7月1日生效的对于欧洲建筑材料燃烧试验的分类管理的新标准将实施。在这个日期之前,是通过对建筑结构的各个部件的燃烧试验性能进行分类来确定类别的。新的标准需要测试包含所有部件在一起的建筑系统。这构成了欧洲耐火性能测试的模式转变。
新的标准按照EN13501-1来分类燃烧试验性能。直线型管绝缘的类别落入A1L-FL的范围。高于FL的类别相当于随着类别接近A1L,耐火性能增强(改善)。FL的类别相当于按照EN ISO 11925-2试验不能达到E类评级。EL的类别相当于通过了EN ISO 11925-2试验,然而这样的类别对于许多应用来说仍然是不够的。为了达到DL、CL或BL的类别,管绝缘必须通过EN ISO 11925-2和EN 13823两种试验。
用于垂直取向的直线型管的热塑性聚合物泡沫基绝缘系统努力在EN13501-1分类评级下,特别是它们努力要达到DL或更好、尤其是CL或更好的类别。因此,需要开发一种绝缘系统,其是合适的绝缘直线型管,特别是垂直取向的管,其在这种新的欧洲燃烧试验标准下,相对于现行的热塑性聚合物泡沫基管绝缘具有改善的性能。
发明内容
本发明提供了用于直线型管的热塑性聚合物泡沫基绝缘系统,其按照直线型管绝缘的欧洲EN13501-1分类,相对于现行热塑性聚合物泡沫基绝缘具有改善的性能。本发明的实施方式按照欧洲EN13501-1标准,以40毫米或更大的热塑性聚合物泡沫厚度可达到CL或更高的类别。本发明的实施方式按照欧洲EN13501-1标准,以50毫米或更大的热塑性聚合物泡沫厚度可达到DL或更高的类别。
按照新的耐火性能分类,性能改善需要的不止是优化绝缘系统的各个单个部件的阻燃性质。相反,本发明是分析包含热塑性聚合物泡沫的管绝缘系统在燃烧试验中作为一个整体的表现并然后对所述绝缘系统作为一个整体来设计系统改进以改善试验性能的结果。不受理论约束,本发明解决了在EN 13823试验条件下,当热塑性聚合物熔化并形成通道(烟囱效应),火和热可通过通道行进以加速所述聚合物泡沫的分解时,所述热塑性泡沫结构倾向于比期望的更迅速坍塌的可能隐患。尝试仅仅将热塑性聚合物泡沫更紧密地封闭起来隔离火焰源证明因将热截留在泡沫内并促进泡沫的熔化和所述烟囱效应而起到相反作用。
本发明提供了绝缘系统,其专门设计成限制熔融的热塑性聚合物泡沫绝缘流动形成引起烟囱效应的通道。
在第一方面,本发明是管绝缘系统,其用作管段的绝缘,所述系统包含:(a)在所述管段周围沿圆周安装的热塑性聚合物泡沫节段,其中每个节段沿着所述管段纵向延伸小于所述管的全长的距离;(b)在所述管段周围沿圆周安装并紧靠任何相邻的热塑性泡沫节段的熔体阻挡材料环,其中所述熔融阻挡材料具有800摄氏度或更高的熔融温度或者其分解而不是熔融;(c)在所述热塑性聚合物泡沫节段和熔体阻挡材料环的周围并沿着由所述绝缘系统覆盖的管段延伸的网,所述网包括间隔开的网构件以限定网构件之间的间隔,所述间隔的平均尺寸为十平方毫米或更大和200平方毫米或更小,并且所述网构件由具有800摄氏度或更高的熔融温度或者其分解而不是发生熔融的材料制成;(d)封闭所述热塑性聚合物泡沫、熔体阻挡材料和网的金属覆盖物;和(e)支撑带,其沿圆周安装在所述金属覆盖物周围并且将所述管绝缘系统固定靠着在其周围存在所述管绝缘的管段;其中熔体阻挡材料环存在于非水平管段的顶部和底部以及沿着所述管段的热塑性聚合物泡沫节段之间,使得沿着所述管段的长度在任何250厘米距离内存在熔体阻挡材料环的至少一部分。
本发明可用于绝缘管,特别是垂直取向的管。本发明对于绝缘管、甚至垂直取向的管尤其合乎需要,同时按照EN 13501-1比目前已知的热塑性聚合物泡沫基管绝缘系统达到更高的类别。本发明可用于获得直线型管绝缘,所述管绝缘按照欧洲EN 13501-1标准以40毫米或更大的热塑性聚合物泡沫厚度可达到CL或更高的类别。本发明还可用于获得直线型管绝缘,所述管绝缘按照EN 13501-1在使用厚度为50毫米或更大的热塑性聚合物泡沫时可达到DL或更高的类别。
附图说明
图1a示出了从管顶部观察,施加于垂直的管段的本发明实施方式。
图1b示出了图1a的管和管绝缘系统的侧剖视图。
具体实施方式
当试验方法编号没有指出日期时,所述试验方法是指截止本文件的优先权日为止最新近的试验方法。参考试验方法包括参考试验协会和试验方法编号二者。本文中采用以下试验方法缩写和标识符:ASTM是指美国测试与材料协会(American Society for Testing and Materials);EN是指欧洲标准(European Norm);DIN是指德国工业协会(DeutschesInstitut für Normung);和ISO是指国际标准组织(InternationalOrganization for Standards)。
“多个”是指两个或更多个。“和/或”是指“和、或者作为替代”。所有的范围包括端点在内,除非另外指出。
“聚合物”,除非另外指出,是指均聚物和共聚物二者。除非另外指出,“共聚物”包括嵌段共聚物、接枝共聚物、交替共聚物和无规共聚物。
“垂直的”是指在所提到的制品的位置处平行于地球重力场的取向。“水平的”是指在所提到的制品的位置处垂直于地球重力场的取向。“垂直取向的”和“非水平的”是同义的并且是指具有垂直分量的取向,优选完全垂直。例如,不是完全水平的任何东西都是垂直取向的。
“顶部”是指垂直取向制品的最高(最远离地心的)部分,通常是该制品的最高表面。“底部”是指制品的最低处,通常是最低表面,其中最低是指最接近地心。
本发明包括热塑性聚合物泡沫节段。热塑性聚合物泡沫包括在其中限定多个孔或空隙的热塑性聚合物连续相基质。所述聚合物泡沫可以是开孔泡沫或闭孔泡沫。开孔泡沫具有30百分比(%)或更高的开孔含量,并且可以具有50%或更高、60%或更高、70%或更高、80%或更高、90%或更高、95%或更高的开孔含量,并且可以具有100%开孔含量。闭孔泡沫具有小于30%的开孔含量,并且可以具有20%或更少、10%或更少、5%或更少的开孔含量,并且可以具有0%开孔含量。开孔含量百分比根据美国试验和材料协会(ASTM)方法D6226-05测定。为了更加热绝缘,期望所述热塑性聚合物泡沫是闭孔泡沫。所述热塑性聚合物泡沫理想地具有25千克/立方米(kg/m3)或更高的密度,优选30kg/m3或更高并更优选35kg/m3或更高,同时理想地具有80kg/m3或更低的密度并且可具有50kg/m3或更低和甚至40kg/m3或更低的密度。为了最小化可用于熔融的聚合物同时最大化绝缘值,较厚的热塑性聚合物泡沫尤其期望较低的密度。热塑性聚合物的泡沫密度根据ASTM D1622-08测定。
可形成所述热塑性聚合物泡沫的连续相基质的合适的热塑性聚合物包括任何一种或多于一种热塑性聚合物的任何组合。烯烃聚合物、烯基-芳族均聚物和包含烯烃和烯基芳族组分两者的共聚物是合适的。适合的烯烃聚合物的例子包括乙烯和丙烯的均聚物和共聚物。
理想地,所述泡沫芯是具有聚合物基质的聚合泡沫芯,所述聚合物基质包含一种或多于一种烯基-芳族聚合物或由其构成。烯基-芳族聚合物是包含聚合成为聚合物结构的烯基芳族单体的聚合物。烯基-芳族聚合物可以是均聚物、共聚物或者均聚物和共聚物的掺合物。烯基-芳族共聚物可以是无规共聚物、交替共聚物、嵌段共聚物、或其任何组合,并可以是线性的、分支的或其混合物。
苯乙烯类聚合物是特别理想的烯基-芳族聚合物。苯乙烯类聚合物具有在聚合物骨架中聚合的苯乙烯单体并且包括苯乙烯均聚物、共聚物及其掺合物。
适合于本发明的苯乙烯类共聚物的例子包括苯乙烯与以下一种或多种的共聚物:丙烯酸,甲基丙烯酸,乙基丙烯酸,马来酸,衣康酸,丙烯腈,马来酸酐,丙烯酸甲酯,丙烯酸乙酯,丙烯酸异丁酯,丙烯酸正丁酯,甲基丙烯酸甲酯,乙酸乙烯酯和丁二烯。
苯乙烯-丙烯腈共聚物(SAN)由于其容易制造和单体可利用性,是用于本发明的特别理想的烯基-芳族聚合物。SAN共聚物可以是嵌段共聚物或无规共聚物,并可以是线性的或分支的。SAN具有比聚苯乙烯均聚物更高的热变形温度,这提供了比聚苯乙烯均聚物泡沫具有更高使用温度的泡沫。本方法的理想的实施方式采用包含SAN、甚至由SAN构成的聚合物组合物。所述一种或多种烯基-芳族聚合物、甚至聚合物组合物本身可以包含SAN与其它聚合物例如聚苯乙烯均聚物的聚合物掺合物、或由其构成。
不管聚合物组合物是只包含SAN、还是SAN与其他聚合物,基于所述热塑性聚合物基质中所有热塑性聚合物的重量,理想地,SAN的丙烯腈(AN)组分的存在浓度为1重量百分比(wt%)或更高、优选5wt%或更高、更优选10wt%或更高。基于所述热塑性聚合物基质中所有热塑性聚合物的重量,理想地,SAN的AN组分的存在浓度为50wt%或更低,通常为30wt%或更低。
所述热塑性聚合物泡沫可以是本发明的最广泛的范围中的任何类型热塑性聚合物泡沫,包括挤塑泡沫和膨胀泡沫二者,然而,挤塑泡沫是最理想的。膨胀泡沫,例如膨胀聚苯乙烯(EPS)泡沫,包含可膨胀泡沫的多个泡沫组分,例如珠粒或条索,所述可膨胀泡沫通常在约束物内(例如模具内或约束片之间)膨胀,迫使膨胀性泡沫结构合起来,使得它们彼此融合形成复合泡沫结构。膨胀泡沫的特征在于具有在整个聚合物泡沫中延伸并包围泡沫孔组群的聚合物表皮。这些表皮相当于在膨胀和模塑所生成的泡沫复合材料期间接触和融合在一起的膨胀性泡沫组分的表面。所述聚合物的表皮具有比平均孔壁或所生成的平均泡沫结构更高的密度和/或厚度。膨胀珠粒泡沫和条索泡沫是两种类型的膨胀聚合物泡沫。膨胀珠粒泡沫包含多个泡沫珠粒,它们膨胀并融合在一起,形成的泡沫结构具有在相当于各个珠粒的表面的聚合物表皮壳中封闭的孔群。条索泡沫包含多条膨胀性聚合物泡沫,它们彼此接触并融合在一起,产生的泡沫结构具有通常在所生成的泡沫的一个尺寸中延伸的聚合物表皮内的孔群。
与膨胀聚合物泡沫相反,挤塑聚合物泡沫例如挤塑聚苯乙烯(XPS)泡沫是通过将单个膨胀性聚合物团块挤塑和膨胀成为聚合物泡沫而制成的,所述聚合物泡沫没有在整个所述聚合物泡沫中延伸并且封闭孔群并且密度或厚度大于平均孔壁或泡沫密度的聚合物表皮网络。挤塑聚合物泡沫从单个聚合物团块膨胀而不是通过将多个膨胀性泡沫团块融合在一起而产生。每个膨胀性团块在其周围具有比较厚或高密度的表皮。因此,膨胀聚合物泡沫在整个所述泡沫中具有这种表皮的网络,而挤塑聚合物泡沫只在它的外表面周围具有这样的表皮。
挤塑聚合物泡沫对于本发明的热塑性聚合物泡沫是更理想的。挤塑聚合物泡沫倾向于是比膨胀聚合物泡沫更好的绝热体并且更抗水分。比较高密度的聚合物表皮的网络可在整个聚合物泡沫中产生热短路(thermal shorts),这在挤塑泡沫中是不存在的。水分还可以沿着融合表皮找到它通过孔隙的路径,在整个膨胀泡沫中形成网络并且不理想地导致绝热降低和其他与水分有关的问题二者。理想地,所述热塑性聚合物泡沫是闭孔挤塑聚苯乙烯泡沫。
热塑性聚合物泡沫可包含分散在所述热塑性聚合物泡沫的聚合物基质内的添加剂。合适的添加剂的例子包括以下的任何一种或多于一种的任何组合:阻燃剂组分(例如:溴化聚合物,非聚合溴化化合物,磷组分,和氯化化合物),红外衰减剂(例如:石墨,炭黑,二氧化钛,氧化铝勃姆石,和金属薄片),加工助剂,着色剂和颜料。
所述热塑性聚合物泡沫节段沿圆周安装在所述管段周围,本发明的管绝缘系统是绝缘的,其中每个节段沿着所述管纵向延伸。节段是指沿着所述管纵向延伸的热塑性聚合物泡沫段。在管段周围沿圆周安装是指以垂直于所述管的长度尺寸的平面包裹在所述管周围,优选完全包裹在所述管周围,同时沿着所述管段纵向延伸。长度对应于制品的最大尺寸并且,相对于管而言,是某物可穿过它在管内流动的方向。热塑性聚合物泡沫节段可包含两片或更多片热塑性泡沫,它们安装在一起以沿圆周包裹在管段周围。
所述热塑性聚合物泡沫节段沿着所述管延伸的距离小于所述管的全长。本发明的管绝缘系统还包含熔体阻挡材料环,其沿圆周安装在所述管段周围并且其位于所述管段的非水平节段的顶端和底端以及沿着所述管段的热塑性聚合物泡沫节段之间。所述熔体阻挡材料环之间的间距要使得沿着所述管段的长度,在任何250厘米距离内,优选在任何100厘米距离内,并更优选在任何50厘米距离内存在熔体阻挡材料环的至少一部分。所述熔体阻挡材料环沿着所述管段紧靠任何相邻的热塑性泡沫节段。所述熔体阻挡材料环可附着于相邻的热塑性泡沫节段,或是不附着的并且独立于相邻的热塑性泡沫节段。
理想地,所述熔体阻挡材料环沿着所述管段的长度尺寸延伸至少10毫米,优选20毫米或更多并且可延伸30毫米或更多,40毫米或更多,甚至50毫米或更多,并同时通常延伸300毫米或更少,并可延伸200毫米或更少,100毫米或更少,80毫米或更少,50毫米或更少并且甚至30毫米或更少。
当用本发明绝缘的管段暴露于火时,所述熔体阻挡材料环在本发明中起到至少以下功能:(1)防止熔融的热塑性聚合物泡沫向所述非水平管段的底部自由流动;(2)当暴露于火时抑制火焰向非水平管段的顶部自由燃烧期间的烟囱效应;和(3)与所述支撑带相结合,所述熔体阻挡环在起火期间即使当热塑性聚合物泡沫部件熔化时也将所述管绝缘系统固定在位。因此,理想地,所述熔体阻挡材料当暴露于火时,比所述系统中的热塑性泡沫保持完整达更长的时段。优选地,所述熔体阻挡材料在整个暴露于火的时段中,至少在对于EN 13501-1分类所规定的试验方法期间保持完整。在这个方面,所述熔体阻挡材料或分解而不是熔融,或具有800摄氏度(℃)或更高、优选1000℃或更高的熔融温度。
在本发明的最广泛范围内,所述熔体阻挡材料可由例如选自聚合物、金属或矿物质的材料的任何一种或组合制成。同时,所述熔体阻挡材料可以是实心的、纤维状或蜂窝状。例如,所述熔体阻挡材料可以是由聚合物、金属、矿物质或其任何组合制成的泡沫(亦即,蜂窝状结构,具有在其中限定多个孔的连续材料基质)。为了最小化所述绝缘系统的重量和增加所述系统的热阻,所述熔体阻挡材料理想地是泡沫。特别地,所述熔体阻挡材料理想地是其为导热材料的材料的泡沫,例如聚合泡沫、泡沫玻璃、泡沫硅酸盐或气凝胶。例如,所述熔体阻挡材料理想地是聚合泡沫,例如聚异氰脲酸酯。理想地,为了优化通过所述熔体阻挡材料的绝热性质,所述熔体阻挡材料是开孔含量小于30%(通过ASTMD6226-05测定)的聚合泡沫,例如聚异氰脲酸酯泡沫。泡沫玻璃也是特别的熔体阻挡材料。为了将所述管绝缘系统的重量保持到最低,理想地,所述熔体阻挡材料具有500千克/立方米(kg/m3)或更低,优选250kg/m3或更低,更优选180kg/m3或更低,并可以是120kg/m3或更低,100kg/m3或更低,80kg/m3或更低和甚至50kg/m3或更低的密度。同时,为了当暴露于火焰时优化结构完整性,理想地,所述熔体阻挡材料具有30kg/m3或更高,更理想地35kg/m3或更高,并可以是40kg/m3或更高,80kg/m3或更高,或甚至100kg/m3或更高的密度。根据ASTM D1622-08测定泡沫密度。
所述热塑性聚合物泡沫和所述熔体阻挡材料环可具有相同的厚度或具有不同的厚度。“厚度”是指垂直于长度并以从所述管段径向的方向延伸的尺寸。所述热塑性聚合物和所述熔体阻挡材料环可具有相同的厚度。然而,所述热塑性聚合物和所述熔体阻挡材料环可具有不同的厚度。另外,不同的熔体阻挡材料环可彼此具有不同的厚度。例如,所述熔体阻挡材料环,或选择的熔体阻挡材料环,可具有比所述热塑性聚合物泡沫更大或比所述热塑性聚合物泡沫更薄的厚度。
所述热塑性聚合物泡沫和所述熔体阻挡材料环可以独立地(是指所述热塑性聚合物泡沫,所述熔体阻挡材料环,或任何选择的所述热塑性聚合物泡沫和一个或多个或所有的熔体阻挡材料环)具有5毫米或更大、10毫米或更大、20毫米或更大、25毫米或更大、30毫米或更大、40毫米或更大、50毫米或更大、60毫米或更大、70毫米或更大、和甚至75毫米或更大的厚度。同时,所述热塑性聚合物泡沫和所述熔体阻挡材料的厚度通常是50厘米或更低并可以是30厘米或更低、10厘米或更低、80毫米或更低、75毫米或更低、甚至50毫米或更低。增加所述热塑性聚合物泡沫的厚度倾向于降低通过所述泡沫的热传导。增加所述熔体阻挡材料的厚度对于熔融的热塑性聚合物泡沫沿着管段向下流和火焰沿着管段向上升,产生了更高的屏障。
所述管绝缘系统在热塑性聚合物泡沫节段之间可以没有橡胶样材料或纤维强化的聚酯和/或环氧化合物。所述管绝缘系统可以完全没有橡胶样材料或纤维强化的聚酯和/或环氧化合物。
本发明的管绝缘系统还包含在所述热塑性聚合物泡沫节段和熔体阻挡材料环的周围并沿着被所述绝缘系统覆盖的所述管段延伸的网。所述网可以是例如纺织或无纺型材料。所述网包裹在所述热塑性聚合物泡沫节段和熔体阻挡材料周围,使得当所述管绝缘系统绝缘管段时,所述热塑性聚合物泡沫和熔体阻挡材料在所述网和所述管段之间。当暴露于热和火时,所述网起到帮助将所述热塑性聚合物泡沫和熔体阻挡材料固定在位的作用。
所述网包含网构件,所述网构件间隔开以限定网构件之间的间隔。网构件之间的间隔是重要的,因为如果所述间隔太小,那么所述网会将热截留在所述热塑性聚合物泡沫内并促进所述热塑性聚合物泡沫熔融。如果网构件之间的间隔太大,则熔融的热塑性聚合物泡沫将自由地通过所述网流出。网构件之间的间隔具有十平方毫米(mm2)或更大的平均尺寸,并可以是10mm2或更大,20mm2或更大,30mm2或更大,50mm2或更大,75mm2或更大,100mm2或更大,甚至150mm2或更大。同时,所述网构件之间的间隔具有200mm2或更小的平均尺寸,并可以具有175mm2或更小、150mm2或更小、125mm2或更小、和甚至100mm2或更小的平均尺寸。
所述网构件由分解而不是熔融或具有800℃或更高、优选1000℃或更高的熔融温度的材料制成。合适的网构件材料包括,例如,玻璃、玻璃纤维、矿物纤维、金属纤维、和芳族聚酰胺纤维。
金属覆盖物封闭所述热塑性聚合物泡沫、熔融阻挡材料和网。所述金属覆盖物理想地由铝制成。厚度(以相对于在其周围存在所述管绝缘的管段的径向方向测量)理想地是10微米或更大,优选20微米或更大并可以是30微米或更大、40微米或更大、50微米或更大、75微米或更大、甚至100微米或更大。同时,所述金属覆盖物的厚度通常是1000微米或更低,并可以是500微米或更低,甚至100微米或更低。
所述金属覆盖物可以是,例如,包裹在所述网和热塑性聚合物泡沫周围的管或片的形式。当所述金属覆盖物是包裹在所述网和热塑性聚合物泡沫周围的片的形式时,理想地,所述金属覆盖物自身搭接、与自身机械联锁或自身搭接和机械联锁二者,使得即使它内部的热塑性聚合物泡沫熔化掉,仍确保它保持在位。如果所述金属覆盖物自身搭接,则理想地,它在所述网和热塑性聚合物泡沫周围搭接多达周长的25%或更多,优选周长的50%或更多。还期望所述搭接型金属覆盖物利用粘合剂或通过以自身机械联锁或用粘合剂和通过机械联锁二者自身附着。延伸小于所述管绝缘系统全长的金属覆盖物段还理想地与相邻的金属覆盖物段搭接、机械联锁或搭接和机械联锁二者。金属覆盖物的搭接段理想地彼此附着、彼此机械联锁、或彼此附着和彼此机械联锁二者。用于所述金属覆盖物自身附着的合适的粘合剂包括环氧粘合剂、丙烯酸类粘合剂和聚氨酯粘合剂。
任选地,在所述网和热塑性聚合物泡沫节段之间存在环氧粘合剂和甚至环氧涂料层。替代地,或附加地,在所述金属覆盖物和所述网之间可存在环氧粘合剂或甚至环氧涂料层。环氧粘合剂和涂料可用于将本发明的管绝缘部件附着在一起。
任选地,如所描述的金属覆盖物还可以存在于所述网构件和热塑性聚合物泡沫之间的所述热塑性聚合物泡沫周围。这样的构造将所述网构件夹在两个金属覆盖物层之间。虽然两个金属覆盖物层如本文所述,但所述两个金属覆盖物层可以彼此不同或相同。也就是说,所述金属覆盖物层可以,例如,在金属组成、厚度、或金属组成和厚度两个方面不同。理想地,所述网和所述聚合泡沫之间的金属覆盖物与封闭所述热塑性聚合物泡沫、熔体阻挡材料和网的金属覆盖物一样厚,或更理想地比其更厚。
在本发明的管绝缘系统周围的支撑带将所述管绝缘系统固定于其周围存在所述管绝缘系统的管。支撑带沿圆周安装在所述管绝缘系统的金属覆盖物周围,并挤压或压迫所述管绝缘系统紧靠其周围存在所述管绝缘系统的管段。理想地,布置所述支撑带使得它们在所述管绝缘系统周围延伸,而熔体阻挡材料环在所述支撑带和在其周围存在所述管绝缘系统的管段之间。在这样的定位中,即使暴露于热或火,所述熔体阻挡材料环仍起到所述管绝缘系统的牢固和稳定部件的作用,使得所述支撑带在即使所述热塑性聚合物泡沫节段熔化的情况下仍将所述管绝缘系统保持在位。
支撑带理想地是金属,但是可由具有800摄氏度或更高的熔融温度或其分解而不是熔融的任何材料制成。合适的支撑带材料的例子包括钢、铝和玻璃强化的塑料带。理想的是在每个熔体阻挡材料环处在管绝缘系统的其余部分周围提供支撑带,使得在每个熔体阻挡材料环处存在支撑带挤压所述管绝缘系统靠紧在其周围存在所述管绝缘系统的管。
实施例
图1a和1b示出了(不按比例)在施加到管段上时的本发明实施方式。图1a示出了在施加于垂直管的本发明的顶部向下看的端视图。图1b示出了沿着图1a显示的观察线A的侧剖视图。
图1a和1b示出了以管绝缘系统10形式的实施例1在22毫米直径的管1周围。管绝缘系统10包含挤塑聚苯乙烯泡沫20的节段(只在图1b中可见,因为熔体阻挡材料环30a阻碍了在图1a中的观察),其沿着管1纵向延伸950毫米。挤塑聚苯乙烯泡沫20具有约35kg/m3的密度、小于5%的开孔含量(例如STYROFOAMTM FB-X牌挤塑聚苯乙烯泡沫,STYROFOAM是The Dow Chemical Company的商标)。熔体阻挡材料环30a存在于管绝缘系统10的顶部。熔体阻挡材料环30b存在于管绝缘系统10的底部。熔体阻挡材料环30沿着管1的长度的距离以950毫米的间距存在。熔体阻挡材料环30a、30b和30各50毫米高(亦即,它们沿着管1的长度尺寸延伸50毫米)。所述熔体阻挡材料环全部是密度为约35kg/m3的闭孔聚异氰脲酸酯泡沫(例如,TARECPIRTM牌绝缘材料,TARECPIR是Kinspand Tarec的商标)。网40延伸所述管绝缘系统的长度并包裹在聚苯乙烯泡沫节段20和熔体阻挡材料环30a、30b和30周围。网40是玻璃纤维,纤维之间的间距为25平方毫米。环氧粘合剂(未显示)存在于网40和挤塑聚苯乙烯泡沫20之间。铝箔50包裹在管绝缘系统10的其余部分周围并沿着管1的长度纵向延伸。铝箔50以相对于管1的长度的径向方向测量,具有40-75微米的厚度(理想地,大约70微米)。支撑带60在所述管绝缘系统的其余部分周围延伸并位于熔体阻挡材料环30周围。
基于类似系统的试验,预计管绝缘系统10根据EN13501-1分类评级达到DL类或更好的评级。
本发明的管绝缘系统的一个另外的例子,实施例2,与图1a和1b中示出的相似,但是有以下改变:
(a)在网材料40和热塑性聚合物泡沫20之间存在第二金属阻挡材料(30-50微米厚、优选约50微米的铝箔),使得网40夹在所述第二金属阻挡材料和金属阻挡材料50之间;
(b)铝箔50(其是金属阻挡材料)是30-50微米(理想地,大约50微米)厚;
(c)熔体阻挡材料环30a、30b和30是密度为120kg/m3的泡沫玻璃;和
(d)热塑性聚合物泡沫20与熔体阻挡材料环30、30a和30b的厚度全部同时为25-30毫米、40毫米或50毫米。
按照EN 13501-1,利用25-30毫米厚度的该另外的实施例达到了CL类别并且通过利用密度为33kg/m3或更低的热塑性聚合物泡沫预计达到BL类别。当所述热塑性聚合物泡沫和熔体阻挡材料环的厚度都是40毫米或50毫米时,该另外的实施例达到DL类别并且预计利用密度为33kg/m3或更低的热塑性聚合物泡沫达到CL类别。
作为参照点,比较例A除了所述挤塑聚苯乙烯泡沫是密度为35kg/m3的STYROFOAMTM FB-X牌挤塑聚苯乙烯泡沫并具有40毫米的厚度之外,与实施例2相似。比较例A的管绝缘系统中没有熔体阻挡环,在铝箔/网/铝箔蒸汽屏障包裹中只有所述挤塑聚苯乙烯泡沫。比较例A的燃烧性能如下:FIGRA0.4MJ为285.20瓦/秒,THR600为28.80兆焦耳,SMOGRA为156.60平方米/秒/秒,和SPR 600为1970平方米。结果,按照EN13501-1,实施例3达到的SBI类别为DL s3d0。
实施例3与实施例2相似,但是有以下改变:管绝缘系统10是1500毫米(mm)长。所述挤塑聚苯乙烯泡沫(STYROFOAM IBTRBEX牌挤塑聚苯乙烯泡沫)具有33kg/m3的密度和50mm的厚度。每个熔体阻挡材料环(30,30a和30b)是100mm高和50mm厚。高度沿着管1测量。厚度在所述管的径向尺寸中测量。所述熔体阻挡材料是120kg/m3密度的泡沫玻璃(FOAMGLASTM T4,FOAMGLAS是Pittsburgh corningCorporation的商标)。所述熔体阻挡材料环之间的间距按照熔体阻挡材料环的中心之间测量是450mm。当进行EN 13823燃烧性能试验时,实施例3具有以下特性:FIGRA0.4MJ为103.30瓦/秒,THR600为11.90兆焦耳,SMOGRA为68.0平方米/秒/秒,和SPR600为668.4平方米。结果,按照EN13501-1,实施例3达到的SBI类别为CL s2d0。
与比较例A相比,实施例3由于在本发明的管绝缘系统中存在所述熔体阻挡材料环,而显示出在EN 13501-1类别上的巨大改善。
Claims (15)
1.管绝缘系统,其用作管段的绝缘,所述系统包含:
a.在所述管段周围沿圆周安装的热塑性聚合物泡沫节段,其中每个节段沿着所述管段纵向延伸小于所述管全长的距离;
b.在所述管段周围沿圆周安装并紧靠任何相邻的热塑性泡沫节段的熔体阻挡材料环,其中所述熔融阻挡材料具有800摄氏度或更高的熔融温度或者其分解而不是熔融;
c.在所述热塑性聚合物泡沫节段和熔体阻挡材料环周围并沿着由所述绝缘系统覆盖的管段延伸的网,所述网包括间隔开的网构件以限定网构件之间的间隔,所述间隔的平均尺寸为10平方毫米或更大和200平方毫米或更小,并且所述网构件由或者具有800摄氏度或更高的熔融温度或者其分解而不是发生熔融的材料制成;
d.封闭所述热塑性聚合物泡沫、熔体阻挡材料和网的金属覆盖物;和
e.支撑带,其沿圆周安装在所述金属覆盖物周围并且将所述管绝缘系统固定靠在其周围存在所述管绝缘的管段;
其中熔体阻挡材料环存在于非水平管段的顶部和底部以及沿着所述管段的热塑性聚合物泡沫节段之间,使得沿着所述管段的长度在任何250厘米距离内存在熔体阻挡材料环的至少一部分。
2.权利要求1的管绝缘系统,其中每个熔体阻挡材料沿着所述管段的长度尺寸延伸至少10毫米。
3.前述权利要求任一项的管绝缘系统,其中所述熔体阻挡材料选自聚合泡沫和泡沫玻璃。
4.权利要求3的管绝缘系统,其中所述熔体阻挡材料具有小于30%的开孔含量,其通过美国试验和材料协会方法D6226-05测定。
5.权利要求3或4的管绝缘系统,其中所述熔体阻挡材料是泡沫玻璃。
6.前述权利要求任一项的管绝缘系统,其中所述熔体阻挡材料具有通过ASTM D1622-08测定的35-120千克/立方米的密度。
7.前述权利要求任一项的管绝缘系统,其中所述热塑性聚合物泡沫是闭孔挤塑聚苯乙烯泡沫。
8.前述权利要求任一项的管绝缘系统,其中所述热塑性泡沫和阻挡材料二者都具有40毫米或更大的厚度。
9.前述权利要求任一项的管绝缘系统,其中所述网构件由玻璃制成。
10.前述权利要求任一项的管绝缘系统,其中所述金属覆盖物是厚度为10微米或更大的铝箔。
11.前述权利要求任一项的管绝缘系统,其还包含在所述网和金属覆盖物之间的环氧粘合剂。
12.前述权利要求任一项的管绝缘系统,其还包含在所述热塑性聚合物泡沫和所述网之间的环氧涂料。
13.前述权利要求任一项的管绝缘系统,其还包含在所述热塑性聚合物泡沫周围并在所述热塑性聚合物泡沫和所述网之间的金属覆盖物,使得所述网位于两个金属覆盖物之间。
14.权利要求13的管绝缘系统,其特征还在于:(i)所述热塑性聚合物泡沫是密度小于36千克/立方米的苯乙烯聚合物泡沫;(ii)所述熔体阻挡材料环是泡沫玻璃;(iii)所述网是玻璃纤维网;(iv)在所述热塑性聚合物泡沫和所述网之间的金属覆盖物是厚度为30-50微米的铝箔;和(v)封闭所述热塑性聚合物泡沫、熔体阻挡材料和网的所述金属覆盖物是厚度为30-50微米的铝箔;并且其中所述热塑性聚合物泡沫和熔体阻挡材料环的厚度各自具有25毫米或更大和50毫米或更小的厚度。
15.任一前述权利要求的管绝缘系统,其特征还在于任何100厘米长度的所述管绝缘系统含有熔体阻挡材料环的至少一部分。
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WO2014035501A2 (en) | 2014-03-06 |
CA2872638A1 (en) | 2014-03-06 |
JP6212112B2 (ja) | 2017-10-11 |
US20150140243A1 (en) | 2015-05-21 |
JP2015528086A (ja) | 2015-09-24 |
WO2014035501A3 (en) | 2014-04-24 |
EP2830874A2 (en) | 2015-02-04 |
RU2014153001A (ru) | 2016-08-10 |
US9897245B2 (en) | 2018-02-20 |
CN104364077B (zh) | 2017-03-15 |
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