CN1225618C - 聚烯烃隔热性泡沫体及其制备方法和制备的管道保温层 - Google Patents
聚烯烃隔热性泡沫体及其制备方法和制备的管道保温层 Download PDFInfo
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Abstract
本发明涉及由聚烯烃隔热性泡沫体制成的管道保温层,该管道保渐层是采用物理发泡剂、通过挤塑包含77-99重量%金属茂聚乙烯、5-18重量%阻燃剂、3-8重量%泡孔稳定剂以及0.5重量%其它常规泡沫体用添加剂的泡沫体组合物而制成的。本发明还涉及制造物理发泡的聚烯烃隔热性泡沫体的方法,以及由此制得的泡沫体。该泡沫体是非常柔软的,因此由此制得的管道保温层特别适用于分体式空调、区域加热、太阳能利用和加工工业的管道保温,甚至是很细的和/或弯曲的管道的保温。该管道保温层是可回收利用的。
Description
技术领域
本发明涉及由聚烯烃隔热性泡沫体制造的管道保温层,涉及聚烯烃隔热性泡沫体,本发明还涉及经物理发泡的聚烯烃隔热性泡沫体的制造方法并涉及以此法制得的泡沫体。
背景技术
对于管道的保温如热水管道、高压和低压蒸汽管道以及用于分体式空调、区域加热、太阳能利用以及加工工业的管道的保温来说,已大量使用具有合成泡沫体壁的空心型材。所述型材在下文中称为管道保温层。
目前可商购的最受重视的管道保温层是PE管道保温层和橡胶管道保温层。
PE管道保温层是由密度为约35千克/立方米的热塑性塑料泡沫体构成的。这类泡沫体通常是采用物理发泡剂(如丁烷)制造的,且是未经交联的。这类泡沫有良好的产品性能如绝热值、燃烧行为和吸水性能。这种泡沫体是可进行回收的。泡沫是采用单一工艺过程制造的,即经一步操作制成的。PE管道保温材料的缺点在于:柔软性较橡胶管道保温材料差,难以包裹细的和弯曲的管道,因而这种材料不适用于某些用途如空调管道和冷却管道。
橡胶管道保温层是由密度约60千克/立方米的弹性体组成的泡沫体构成的。这类泡沫体通常是采用化学发泡剂(例如偶氮化合物)制造的并且通常是经交联的。橡胶管道保温层是一种柔软易于包裹的材料。这类泡沫体具有良好的产品性能如绝热值和燃烧行为。橡胶管道保温层的缺点在于:它不能回收,且比较重(即隔热时需要较多的材料)。吸水性能是好的,但当表面受损时其表现象海棉一样,它的良好性能也会随之消失。橡胶管道保温层的另一缺点在于这种材料是通过包括三步工艺步骤的方法制造的:捏和、挤塑和发泡。连同橡胶泡沫体密度较高,因而橡胶管道保温层的成本高于PE管道保温层。
美国专利6054078公开了一种制造整体粘合的多层发泡制品的方法,该方法包括首先采用物理发泡剂,挤塑发泡的芯材,冷却所述芯材,加热芯材表面至温度达到芯材的熔点,然后将熔融的塑性涂料涂敷在芯材周边的已加热表面上。该芯材可包含金属茂聚合物和诸如阻燃剂和泡孔稳定剂的添加剂。
发明内容
因此,需要一种具有优良隔热性能的、由可回收低密度优选为35千克/立方米或以下的发泡体制造的、易于包裹弯曲管道的超柔软管道保温层。
业已发现,对管道保温层的这种要求可通过由一层聚烯烃泡沫体构成的管道保温层而达到,其中聚烯烃泡沫体只包含金属茂聚乙烯作为聚烯烃。
本发明提供一种聚烯烃隔热性泡沫体,该泡沫体是采用物理发泡剂、通过挤塑包含金属茂聚乙烯、阻燃剂和泡孔稳定剂的泡沫体组合物而制成的,其特征在于:所述组合物包含77-92重量%金属茂聚乙烯、5-10重量%阻燃剂、任选稳定剂和/或阻燃剂用的催化剂、3-8重量%泡孔稳定剂和0-5重量%其它常规泡沫体用添加剂,其中所述阻燃剂、所述任选催化剂和所述任选稳定剂的总量为5-18重量%。
泡沫体的密度优选低于35千克/立方米,特别是低于30千克/立方米。
泡沫体的柔软度是根据DIN 53577的压陷强度来表示。优选的是,当压陷为10%时,压陷强度为0.020牛/平方毫米或以下;当压陷为20%时,压陷强度为0.035牛/平方毫米;当压陷为50%时,压陷强度为0.100牛/平方毫米。
由于泡沫体的高柔软性,根据本发明的泡沫体制造的管道保温层能顺利地包裹弯曲的管道。由于泡沫体是采用物理发泡剂制造、未经化学交联的,因此这种泡沫体容易回收利用。
名词“金属茂聚乙烯”是指在金属茂催化剂存在下使乙烯聚合而制得的聚乙烯。有关金属茂聚乙烯的制造和加工可参看例如Kurt W.Schwogger,An outlook for metallocene and single site catalysttechnology into the 21stcentury,Antec 98,Processing MetallocenePolyolefines,Conference Proceedings,October 1999,RapraTechnology,and Proceedings of 2nd International Congress onMetallocene Polymers,Scotland Conference Proceedings,March1998。
适用于制备根据本发明的聚烯烃泡沫体的聚烯烃是例如密度为880-920千克/平方米,熔体流动指数(MFI)为0.5与4.5克/10分钟(190℃)之间,DSC熔点峰为98与107℃之间,拉伸强度(ASTM D-683M-90,50毫米/分钟)为20与60兆帕之间的聚烯烃弹性体。
本发明还提供一种采用物理发泡剂,通过挤塑包含金属茂聚乙烯、阻燃剂和泡孔稳定剂的组合物制造物理发泡的聚烯烃隔热性泡沫体的方法,其特征在于该方法包括下述步骤:a)在挤塑机中混合77-92重量%金属茂聚乙烯、5-10重量%阻燃剂、任选稳定剂和/或阻燃剂用的催化剂和0-5重量%泡沫体用添加剂,以得到混合物,其中所述阻燃剂、所述任选催化剂和所述任选稳定剂的总量为5-18重量%,b)向所述混合物添加3-8重量%泡孔稳定剂,c)使所述混合物在压力从1巴升至400巴、温度已调整至180-240℃的挤塑机熔融段进行熔融,d)在140-180℃注入温度和200-300巴注入压力下,注入物理发泡剂,e)使熔融混合物在温度已调整到60-110℃的挤塑机冷却段冷却,以及f)挤塑混合物,使混合物通过温度已调整到85-110℃的挤出注嘴,以使混合物在1大气压压力下发泡成泡沫体。
具体实施方式
只要不会影响泡沫体性能的技术上通用的任何阻燃剂都可用作本发明的阻燃剂。用于本发明的阻燃剂的实例包括含有卤素的阻燃剂。含卤素阻燃剂通常是与稳定剂(如季戊四醇)和催化剂(如三氧化锑)一起使用的。三氧化锑与含卤素组分之间的混合比可以是例如约1∶3或1∶2。也可采用各种不同的阻燃剂。包括任选的稳定剂和催化剂的阻燃剂的总添加量为约5-18重量%(以聚合物和添加剂总量计)。当阻燃剂用量低于约5重量%时,泡沫体的阻燃性能不能满足阻燃要求。当阻燃剂的用量高于10%时,就可能影响泡沫体的性能(柔软性)。
泡孔稳定剂能阻止发泡剂在注入聚合物熔体后随即从熔体逸出,而发泡剂的选出会造成不形成泡沫体的结果。只要不影响泡沫体的性能,技术上通常采用的任何泡孔稳定剂都可用作本发明的泡孔稳定剂。适用的泡孔稳定剂的实例包括硬脂酸酰胺、乙二醇一硬脂酸酯和甘氨酸脂肪酸。也可采用一种以上泡孔稳定剂。泡孔稳定剂的总添加量为约3-8重量%(以聚合物和添加剂总量计)。泡孔稳定剂可在混合物熔融前借助例如侧喂料机添加到聚合物、阻燃剂和任选其它添加剂的混合物中。
除了阻燃剂和泡孔稳定剂外,还可向泡沫体添加聚烯烃泡沫体常用添加剂。这类添加剂的非限制性实例包括着色剂、颜料、填料、成核剂和稳定剂。
作为发泡剂,只要在高压下特别是在实施该方法的挤塑机中的压力下呈液态,但在较低压力下会蒸发的任何物质都可采用。发泡剂的非限制性实例包括3-8个碳原子的烷烃例如丙烷、丁烷、异丁烷和乙烷。发泡剂是在温度为140-180℃,压力为200-300巴下,连续地注入挤塑机内熔融混合物中的。
重要的是,当混合金属茂聚乙烯、阻燃剂和任选添加剂时,使混合物在挤塑机中充分熔融,即聚合物处于液态,此时聚合物的粘弹性能使聚合物与添加剂相互充分混合,在后一步骤中也能使物理发泡剂充分地混入聚合物混合物中。当制备根据本发明的聚烯烃泡沫体时,采用对混合物施加低剪切力的混合机,温度的选择要使聚合物的粘弹性与添加剂的粘弹性几乎相等时是有利的。表示粘性的参数是熔体流动指数(MFI)(在一定的温度和压力下材料的流出量)。根据该方法,聚合物和添加剂的适宜MFI值(190℃时)为0.5与4.5克/10分钟之间。
本发明方法可在L/D为30与60之间、配备有混和部件(por-cupines)和静态混合机的单螺杆挤塑机中实施,例如生产能力为50-150千克/小时。
根据本发明的管道保温材料的适宜内径为4-130毫米,壁厚为3-30毫米。
实施例
准备一台开口面积为5-100平方毫米上述类型的单螺杆挤塑机,将转速调整至15-40rpm。
向挤塑机添加按上述混合比的聚合物和添加剂(阻燃剂、泡孔稳定剂)的混合物。将挤塑机熔融段的温度调整到200-240℃,冷却段的温度调整到60-95℃。在注入压力为200-250巴和物质温度为80-105℃下,以20-25升/小时(液态)的流量将发泡剂(液体发泡剂)注入混合物中。使挤塑机中压力降至注嘴处的压力约10-30巴,此后,混合物发泡形成密度为20-25千克/立方米、内径为18-28毫米,壁厚为20-30毫米的管道保温层形式的泡沫材料。
根据本发明的管道隔热材料具有下列性能:
性能 | |
密度(kg/m3,体积法测定) | 15-30 |
泡孔截面(mm) | 0.30-0.50 |
绝热值(λ40,W/m.k) | 0.035-0.040 |
柔软性1)(压陷强度N/mm2) | |
10%压陷 | 0.012-0.020 |
20%压陷 | 0.018-0.026 |
50%压陷 | 0.076-0.096 |
70%压陷后回弹,t=0小时(内推法) | 90-95 |
70%压陷后回弹,t=1小时(内推法) | 95-100 |
1)柔软性按DIN 53577测定。
Claims (10)
1.一种聚烯烃隔热性泡沫体,该泡沫体是采用物理发泡剂、通过挤塑包含金属茂聚乙烯、阻燃剂和泡孔稳定剂的泡沫体组合物而制成的,其特征在于:所述组合物包含77-92重量%金属茂聚乙烯、5-10重量%阻燃剂、任选稳定剂和/或阻燃剂用的催化剂、3-8重量%泡孔稳定剂以及0-5重量%其它常规泡沫体用添加剂,其中所述阻燃剂、所述任选催化剂和所述任选稳定剂的总量为5-18重量%。
2.根据权利要求1的聚烯烃隔热性泡沫体,其密度不高于35千克/立方米。
3.根据权利要求1的聚烯烃隔热性泡沫体,其密度不高于30千克/立方米。
4.根据权利要求1、2或3的聚烯烃隔热性泡沫体,按DIN 53577测定的压陷强度为:
压陷10%时,≤0.020牛/平方毫米,
压陷20%时,≤0.035牛/平方毫米,和
压陷50%时,≤0.100牛/平方毫米。
5.聚烯烃隔热性泡沫体制造的管道保温层,其特征在于所述聚烯烃隔热性泡沫体是权利要求1-4任一项所述聚烯烃隔热性泡沫体。
6.一种通过采用物理发泡剂挤塑包含金属茂聚乙烯、阻燃剂和泡孔稳定剂的组合物制造物理发泡的聚烯烃隔热性泡沫体的方法,其特征在于该方法包括下述步骤:a)在挤塑机中混合77-92重量%金属茂聚乙烯、5-10重量%阻燃剂、任选稳定剂和/或阻燃剂用的催化剂和0-5重量%泡沫体用添加剂以得到混合物,其中所述阻燃剂、所述任选催化剂和所述任选稳定剂的总量为5-18重量%,b)向所述混合物添加3-8重量%泡孔稳定剂,c)使所述混合物在压力从1巴升至400巴、温度已调整至180-240℃的挤塑机熔融段进行熔融,d)在140-180℃注入温度和200-300巴注入压力下,注入物理发泡剂,e)使熔融混合物在温度已调整到60-110℃的挤塑机冷却段冷却,以及f)挤塑混合物,使混合物通过温度已调整到85-110℃的挤出注嘴,以使混合物在1大气压压力下发泡成泡沫体。
7.根据权利要求6的方法,其中制得的泡沫体的密度不高于35千克/立方米。
8.根据权利要求6的方法,其中制得的泡沫体的密度不高于30千克/立方米。
9.根据权利要求6的方法,其中制得的泡沫体按DIN 53577测定的压陷强度为:
压陷10%时,≤0.020牛/平方毫米
压陷20%时,≤0.035牛/平方毫米
压陷50%时,≤0.100牛/平方毫米
10.根据权利要求6-9任一项方法,其中混合物发泡成管道保温层形态的泡沫体。
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---|---|---|---|
PCT/NL2000/000859 WO2002042679A1 (en) | 2000-11-23 | 2000-11-23 | Ultra-flexible pipe insulation |
Publications (2)
Publication Number | Publication Date |
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CN1461393A CN1461393A (zh) | 2003-12-10 |
CN1225618C true CN1225618C (zh) | 2005-11-02 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNB008200726A Expired - Fee Related CN1225618C (zh) | 2000-11-23 | 2000-11-23 | 聚烯烃隔热性泡沫体及其制备方法和制备的管道保温层 |
Country Status (15)
Country | Link |
---|---|
US (1) | US20030232898A1 (zh) |
EP (1) | EP1336064B1 (zh) |
JP (1) | JP2004514747A (zh) |
CN (1) | CN1225618C (zh) |
AT (1) | ATE288049T1 (zh) |
AU (1) | AU2001225570A1 (zh) |
DE (1) | DE60017807T2 (zh) |
DK (1) | DK1336064T3 (zh) |
ES (1) | ES2236030T3 (zh) |
HK (1) | HK1058816A1 (zh) |
PL (1) | PL201629B1 (zh) |
PT (1) | PT1336064E (zh) |
TR (1) | TR200300730T2 (zh) |
UA (1) | UA75618C2 (zh) |
WO (1) | WO2002042679A1 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2856924T3 (es) * | 2014-03-10 | 2021-09-28 | Hickory Springs Mfg Co | Espuma a base de polietileno sin reticular de alta temperatura y procedimientos de fabricación de la misma |
EP3357963A1 (en) | 2017-02-06 | 2018-08-08 | Armacell Enterprise GmbH & Co. KG | Crosslinked thermoplastic elastomeric insulation |
NL2019501B1 (en) | 2017-09-07 | 2019-03-14 | Thermaflex Int Holding B V | Flexible polyolefin thermal insulation foam and use thereof, and a method for producing a flexible polyolefin thermal insulation foam. |
CN109256220B (zh) * | 2018-09-20 | 2020-07-07 | 中广核研究院有限公司 | 稳压器及其流量分配罩和防热套管的连接结构 |
NL2022875B1 (en) | 2019-04-05 | 2020-10-12 | Thermaflex Int Holding B V | Insulated pipe |
US20210395480A1 (en) * | 2020-06-22 | 2021-12-23 | Total American Services | Extruded Non-Crosslinked Polyethylene Foam |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5481370A (en) * | 1977-12-13 | 1979-06-28 | Japan Styrene Paper Corp | Method of making polyolefin foam |
DE3702585A1 (de) * | 1987-01-29 | 1988-08-11 | Marquet & Cie Noel | Verfahren und vorrichtung zur kontinuierlichen umhuellung von voll- oder hohlprofilen, insbesondere von rohren, mit einem extrudierten schaumstoffmantel aus thermoplastischem kunststoff, sowie auf diese weise hergestellte produkte |
US5340840A (en) * | 1993-03-18 | 1994-08-23 | The Dow Chemical Company | Foam structures of ethylenic polymer material having enhanced toughness and elasticity and process for making |
US5932659A (en) * | 1994-09-19 | 1999-08-03 | Sentinel Products Corp. | Polymer blend |
JPH08302056A (ja) * | 1995-05-12 | 1996-11-19 | Sekisui Chem Co Ltd | 難燃性樹脂発泡体の製造方法 |
JPH0977894A (ja) * | 1995-09-14 | 1997-03-25 | Sekisui Chem Co Ltd | 発泡用難燃性ポリエチレン系樹脂組成物及び発泡体 |
BR9707329A (pt) * | 1996-02-01 | 1999-12-28 | Dennis A Knaus | Composição de agente de controle de estabilidade para espuma de poliolefina |
JPH10175242A (ja) * | 1996-12-18 | 1998-06-30 | Sekisui Chem Co Ltd | 樹脂組成物及び発泡体の製造方法 |
US5904970A (en) * | 1997-06-13 | 1999-05-18 | Nomaco, Inc. | Integrally bonded, multilayer foamed product |
US6599963B2 (en) * | 1997-06-30 | 2003-07-29 | Ciba Specialty Chemicals Corporation | Flame retardant compositions |
JPH1160781A (ja) * | 1997-08-26 | 1999-03-05 | Sakai Kagaku Kogyo Kk | 無架橋ポリオレフィン系ノンスリップ発泡樹脂シート |
US6417240B1 (en) * | 1998-08-28 | 2002-07-09 | Dow Global Technologies Inc. | Foams prepared from blends of syndiotactic polypropylenes and thermoplastic polymers |
US6245266B1 (en) * | 1999-03-15 | 2001-06-12 | Sealed Air Corp. (Us) | Method for making oriented polyethylene foam and foam produced thereby |
US6593386B1 (en) * | 1999-09-13 | 2003-07-15 | Sealed Air Corporation (U.S.) | Compitable linear and branched ethylenic polymers and foams therefrom |
-
2000
- 2000-11-23 CN CNB008200726A patent/CN1225618C/zh not_active Expired - Fee Related
- 2000-11-23 PT PT00989026T patent/PT1336064E/pt unknown
- 2000-11-23 DK DK00989026T patent/DK1336064T3/da active
- 2000-11-23 WO PCT/NL2000/000859 patent/WO2002042679A1/en active IP Right Grant
- 2000-11-23 DE DE60017807T patent/DE60017807T2/de not_active Expired - Lifetime
- 2000-11-23 EP EP00989026A patent/EP1336064B1/en not_active Expired - Lifetime
- 2000-11-23 PL PL360918A patent/PL201629B1/pl unknown
- 2000-11-23 AT AT00989026T patent/ATE288049T1/de active
- 2000-11-23 UA UA2003054670A patent/UA75618C2/uk unknown
- 2000-11-23 JP JP2002544576A patent/JP2004514747A/ja active Pending
- 2000-11-23 AU AU2001225570A patent/AU2001225570A1/en not_active Abandoned
- 2000-11-23 ES ES00989026T patent/ES2236030T3/es not_active Expired - Lifetime
- 2000-11-23 TR TR2003/00730T patent/TR200300730T2/xx unknown
-
2003
- 2003-05-15 US US10/439,279 patent/US20030232898A1/en not_active Abandoned
-
2004
- 2004-01-14 HK HK04100270A patent/HK1058816A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE60017807D1 (de) | 2005-03-03 |
PL201629B1 (pl) | 2009-04-30 |
UA75618C2 (uk) | 2006-05-15 |
DE60017807T2 (de) | 2006-01-05 |
EP1336064A1 (en) | 2003-08-20 |
DK1336064T3 (da) | 2005-05-30 |
ATE288049T1 (de) | 2005-02-15 |
JP2004514747A (ja) | 2004-05-20 |
CN1461393A (zh) | 2003-12-10 |
PL360918A1 (en) | 2004-09-20 |
EP1336064B1 (en) | 2005-01-26 |
HK1058816A1 (en) | 2004-06-04 |
WO2002042679A1 (en) | 2002-05-30 |
ES2236030T3 (es) | 2005-07-16 |
US20030232898A1 (en) | 2003-12-18 |
TR200300730T2 (tr) | 2004-08-23 |
AU2001225570A1 (en) | 2002-06-03 |
PT1336064E (pt) | 2005-06-30 |
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