CN102596568A - 透气性防护布和防护服 - Google Patents

透气性防护布和防护服 Download PDF

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CN102596568A
CN102596568A CN201080033854XA CN201080033854A CN102596568A CN 102596568 A CN102596568 A CN 102596568A CN 201080033854X A CN201080033854X A CN 201080033854XA CN 201080033854 A CN201080033854 A CN 201080033854A CN 102596568 A CN102596568 A CN 102596568A
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layer
gas permeability
isolation cloth
high strength
nonwoven web
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布莱恩·W·莱昂斯
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International Enviroguard Systems Inc
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    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
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    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

本发明公开了用于防护服的透气性复合隔离布,该隔离布包括高强度无纺料片、隔离层和穿孔薄膜层,其中隔离层布置在高强度无纺料片层与薄膜层之间。使用压光、热结合和/或粘合剂将不同的层和料片连接在一起形成隔离布。透气性复合隔离布能够以大于99%的效率阻断0.3微米粒子,同时,能在20帕下允许7CFM至9CFM的空气传递。防护服可由透气性复合隔离布制成,使得高强度无纺料片位于防护服的身体侧以及薄膜层位于防护服的外侧。

Description

透气性防护布和防护服
相关申请
本申请要求2009年7月29日申请的、名称为“透气性防护服”的61/229,742号美国临时申请和2010年7月28日申请的、名称为“透气性防护织物和防护服”的12/845,211美国实用申请的优先权,两份申请的全部内容被参考引入。
发明背景
防护服在防止不同工业中的工人暴露于有害物质方面发挥着重要作用。例如,化工厂使用防护服保护工人以防止其接触化学试剂,生物研究实验室使用防护服保护研究人员以防止其接触细菌或其它传染物。
目前可用的工业防护服不能给用户提供最佳的防护和舒适性的结合。例如,在防护小于0.5微米的有害粒子的防护服中使用了聚烯烃和微孔膜材料,这些材料由于阻止了空气传递经过布料,从而牺牲了用户舒适性。另外,允许空气传递以提供用户舒适性的防护服不能提供保护用户不受有害物质影响所需要的足够安全的手段。
发明概要
不同的实施方案提供了用于防护服的透气性复合隔离布,其可以包括高强度无纺料片层、薄膜层和布置在高强度无纺料片层与薄膜层之间的隔离层。隔离层可以具有每平方米25克的基重。不同实施方案的透气性复合织物能够以大于99%的效率滤除0.3微米的粒子。
不同实施方案的透气性复合隔离布可以在20帕的压力下实现每分钟7立方英尺(CFM)和9CFM之间的空气传递。透气性复合隔离布可被构造成利用粘合剂结合将高强度无纺料片层结合到隔离层。透气性复合隔离布可以包括高强度无纺料片层,该高强度无纺料片层是具有每平方米30克的基重的纺粘料片。透气性复合隔离布的隔离层可包括经过压光并且具有每平方米25克的基重的熔喷料片。透气性复合隔离布的薄膜层可以是穿孔膜,用来防止布磨损和允许空气渗透以消除作用于用户的潜在热应激。
在一个实施方案中,防护服可由透气性复合隔离布制成。
附图说明
这里并入且构成说明书一部分的附图示出了本发明的典型方面,附图与上述的概括描述及下述的详细描述一起来帮助解释本发明的特征。
图1是透气性复合隔离布的分解图,示出了根据一个实施方案的三个布层。
图2是透气性复合隔离布的横截面图,示出了如何使用粘合剂将各层粘结在一起。
图3是包括有内部芯吸层的透气性复合隔离布实施方案的横截面图。
图4示出了根据一个实施方案的透气性复合隔离布制成的防护服。
详细说明
参考附图对不同的实施方案进行详细描述。无论何种情况,同样的附图标记在所有附图中表示相同或同样的部件。用于优选实施方案的参考和资料只是用于说明目的,并不用来对本发明或权利要求书的范围构成限制。
这里使用的术语“纤维”和“纤维的”表示粒子材料,其中每种材料的长度和直径的比大于约10。
这里使用的术语“纺粘”细丝是指从大量的细小、通常是圆的、毛细管将熔融的热塑性材料挤出成为细丝所形成的细丝,挤出的细丝的直径,例如通过流体拉拽或其他已知的纺粘机制,迅速减小。纺粘细丝通常是连续的,并且通常具有大于约5微米的平均直径。
这里使用的术语“纺粘料片”是指由纺粘细丝形成的料片。纺粘无纺布或料片是通过将纺粘细丝无规地布置到聚集面例如有孔的筛或带上而形成的。纺粘料片可以用本领域已知的方法进行粘结,例如热压(hot-role calendaring)、热风粘结,或在升高的压力下使料片通过饱和蒸气室。例如,料片可以在很多个遍布纺粘布的热粘结点处进行热点粘结。一种制作纺粘无纺料片的生产方法实例在4,340,563号美国专利中公开,此专利的全部内容被参考引入。
这里使用的术语“熔喷”纤维是指将能熔融加工的聚合物挤出穿过大量的毛细管成为熔融的线或细丝并进入高速加热的气流中所形成的纤维。高速气流使得熔融的热塑性聚合物材料的细丝变细,使其直径降至约0.5微米至10微米。熔喷纤维通常是不连续的纤维,但也可以是连续的。被高速气流携带的熔喷纤维可以沉积在聚集面上形成无规分散纤维的熔喷料片。这里使用的术语“熔喷料片”是指由熔喷纤维形成的料片。熔喷工艺是熟知的并且在不同的专利和出版物中公开,包括NRL报告4364,V.A.Wendt,E.L.Boone和C.D.Fluharty的“Manufacture of super--Fine Organic Fibers”;和NRL报告5265,K.D.lawrence,R.T.Lukas和J.A.Young的“An Improved Device for theFormation of Super Fine Thermoplastic Fibers”;以及1974年11月19日授权的3,849,241号美国专利,上述文献的全部内容参考引入。
不同实施方案的透气性复合隔离布可包括高强度无纺料片、隔离层和薄膜层(例如穿孔膜)。高强度无纺料片可为隔离层和整个透气性复合隔离布提供绝大部分的强度和支撑。隔离层可提供具有的孔尺寸能够以大于99%的效率滤除0.3微米的粒子的隔离布。薄膜层可通过防止磨损来保护透气性复合隔离布,并允许空气渗透用于用户舒适性目的。因此,透气性复合隔离布可以用来例如作为制造防护服的材料,其中高强度无纺料片朝向穿戴者,且薄膜层朝向环境。高强度无纺料片可被构造成具有充分的整体性和一致性以保护隔离层不被磨损,例如与衣服或穿防护服的人的身体之间的摩擦所引起的磨损。
图1示出了透气性复合隔离布10的三个层的典型布置。隔离布可包括至少三层:薄膜层20、隔离层30和高强度无纺料片层40。透气性复合隔离布10可用在防护服中,从而薄膜层20是透气性复合隔离布的外层以保护内部层不被磨损,并且允许空气渗透用于用户舒适性目的。
薄膜层20可由穿孔膜构成。当透气性膜由具有允许水蒸气传递但限制液体传递的尺寸的微孔性空隙或开口形成时,其可以是不透液体的。这样的膜是熟知的并且通常由聚烯烃膜,例如聚乙烯或聚丙烯,形成。微孔性、透气性、不透液体的膜在4,777,043、5,855,999和6,309,736号美国专利公开,上述专利的全部内容在这里被参考引入。具有必需的隔离性能的透气性膜在3,953,566和4,194,041号美国专利中公开,两份专利的全部内容在这里被参考引入。
布置在薄膜层20和高强度无纺料片层40之间的是隔离层30。隔离层30可由熔喷料片构成。用于不同实施方案的熔喷料片具有每平方米20克(GSM)至30克的基重。优选,隔离层具有约25GSM的基重。
作为内层,透气性复合隔离布10可包括高强度无纺料片层40,以保护隔离层30并为整个布提供强度。高强度无纺料片层40可由强度高、抗磨损且能够接合到其它层(例如薄膜层20)的材料组成。高强度无纺料片层40可以是具有所希望的强度和抗磨损性能的纺粘无纺料片。在一个实施方案中,纺粘料片可具有约25GSM至约35GSM的基重,更优选约30GSM的基重。
由于纺粘纤维当铺设到表面上以形成料片时,其通常不具有粘性,因此必须采用本领域熟知的一种或多种手段来赋予所述料片以整体性,所述手段为例如点粘结、热风粘结、HAK(热气刀)、水刺、针刺和/或粘合剂粘结。
高强度无纺料片层40、隔离层30和薄膜层20共同构成透气性复合隔离布10。尽管不同的实施方案主要讨论了三个层的使用,但本领域技术人员可以认识到其它附加层和/或内层也可以与透气性复合隔离布10一同使用。
在一个实施方案中,高强度无纺料片层40或隔离层30在其被层压形成布前,可以经历作为工艺过程的一部分的压光。
可以利用不同的技术将不同实施方案的透气性复合隔离布的层和料片彼此结合。在一个实施方案中,利用压光方法将布的层和料片结合。例如,高强度无纺料片层40和隔离层30可以通过压光而结合在一起。一些压光布和一些未压光布的组合也可以用于不同的实施方案。
在进一步的实施方案中,透气性复合隔离布的不同层和料片可以利用例如热结合的方法结合在一起。尽管透气性复合隔离布可以由不同的材料制成,但是用来构成布的不同层和料片可包括具有一些相似熔点的聚烯烃。例如,隔离层30和薄膜层20可以包括聚乙烯或聚丙烯。同样地,高强度无纺料片层40还可以包括由聚乙烯或聚丙烯制成的纤维或纤维成分。在所有三个层中具有相似的材料可以允许不同的层和料片在形成不同实施方案的布时进行热结合。
在图2所示的实施方案中,利用粘合剂50,例如商用粘合剂,将不同的层和料片粘结在一起。一种适合的商用粘合剂是National Starch& Chemical Co.Ltd.销售的产品号为DM5213的粘合剂。这种内层粘合剂可具有2-3GSM的基重。在一个实施方案中,使用粘合剂层压以及本领域已知的其它方法可制造不同实施方案的布。
在一个实施方案中,已知的UV稳定剂可被加入到布的各层中。此类稳定剂的例子包括2-羟基二苯甲酮、2-羟基苯并三氮唑、羟基苯甲酸酯、金属螯合物稳定剂和受阻胺光稳定剂。羟基苯甲酸酯稳定剂的一个例子是3,206,431号美国专利描述的2,4-二叔丁基苯基酯,该专利全部内容被参考引入。金属螯合物稳定剂在本领域是熟知的,其主要包括镍复合物。优选地,用于不同实施方案的稳定剂是受阻胺光稳定剂,这是一类包括没有氢原子邻近氮原子的环胺部分的稳定剂。
受阻胺和胺也可以用作UV稳定剂,这在美国专利5,200,443中已公开,该专利全部内容被参考引入。应该注意,分子量超过1000、优选约1000至5000之间的受阻胺稳定剂相对于类似的低分子量稳定剂通常会提供改善的稳定性。优选地,聚合物成分内的受阻胺的量为约0.5重量%至约3重量%。然而,被加入到聚合物中的UV稳定剂的方式和量随着特别的聚合物配方和所选择的UV稳定剂的不同而异。
在进一步的实施方案中,为提高UV的稳定性和/或改善最终产品的美感而向各层中添加颜料。因为即使简单的有机颜料会给UV稳定性带来不利影响,因此进一步提高UV稳定性的颜料,例如金属氧化物颜料与受阻胺稳定剂结合使用。颜料与UV稳定剂的结合使用在美国专利5,200,443、6,040,255和5,738,745中公开,上述专利的全部内容被参考引入。
不同实施方案的透气性复合隔离布10可被构造成除利用物理拦截的方法之外,还利用例如惯性沉积、无规扩散和静电沉积来捕捉小至0.3微米的粒子。这种保护可以与穿过透气性复合隔离布的大量空气循环或空气传递共同存在。根据ASTM D737试验方法的测量结果,不同实施方案的透气性复合隔离布在20帕的差压下其空气传递为每分钟7立方英尺至9立方英尺(CMF)。ASTM D737试验方法是熟知的,其测量纺织物的空气渗透性,所述纺织物包括机织织物、气囊织物、毯子、拉毛织物、针织织物、层状织物和起绒织物。空气渗透性是指在规定的压差下所述材料的两个表面之间的垂直通过的气流的速度。
不同实施方案的透气性复合隔离布10重量较轻,通常等于或小于约50GSM。不同实施方案的透气性复合隔离布10可被构造成能通过憎水性和/或亲水性细丝或内涂层将汗水从用户的皮肤表面吸除。图3示出了该实施方案,其示出了由憎水性和/或亲水性细丝制造的内涂层45。内涂层45可通过本领域熟知的任意方法结合到高强度无纺料片层40。不同实施方案的透气性复合隔离布10还可允许过滤等级的重现性和容易制造。
不同实施方案的透气性复合隔离布的强度可以利用ASTM D5036测试法估算出。利用这种方法,已经测量出一种实施方案的透气性复合隔离布的强度为纵向(MD)约7.5磅、横向(CD)约8.1磅。另一种用来测量透气性复合隔离布强度的测试方法为ASTM D5735。利用ASTM D5735测试方法,已经测量出一种实施方案的透气性复合隔离布的强度为纵向(MD)约2.5磅、横向(CD)约2.5磅。
不同实施方案的透气性复合隔离布可用来制作防护服。图4示出了由一个实施方案的透气性复合隔离布制成的一个实施方案的防护服。防护服包括在顶部的肩线75处具有颈部开口70的身体部分60、两个从身体部分60延伸的袖部分80,每个袖80具有内边缘和外边缘,和从身体部分60延伸的两个腿部分90。
在进一步的实施方案中,不同实施方案的布可用于制作带或不带风帽和靴子的连裤工作服、围裙、鞋和靴子以及清洁室防护服。因为不同实施方案的布能过滤小至0.3微米的粒子并允许大量的空气从布的层和料片流通,所以由这样的布制成的防护服能给用户提供安全和舒适的衣服。
尽管通过特定的实施方案详细地描述了本发明,但在不脱离这里所述的实施方案范围内的各种改变、改进或其它变化对本领域技术人员来说是显而易见的。因此可以预期所有此类改进、改变或变化都包含在本发明的权利要求书中。另外,任何对权利要求部件的单数限定,例如冠词“a”、“an”或“the”并不是限定部件只有一个。

Claims (16)

1.用于防护服的透气性复合隔离布,包括:
高强度无纺料片层;
薄膜层;和
布置在高强度无纺料片层和薄膜层之间的隔离层,该隔离层具有每平方米25克的基重;
其中,所述透气性复合隔离布能够以大于99%的效率滤除0.3微米的粒子。
2.权利要求1所述的透气性复合隔离布,其中隔离布被构造成在20帕的差压下允许每分钟7立方英尺(CFM)和9CFM之间的空气传递。
3.权利要求1所述的透气性复合隔离布,其中利用粘合剂结合将高强度无纺料片层结合到隔离层。
4.权利要求1所述的透气性复合隔离布,其中高强度无纺料片层是具有每平方米30克的基重的纺粘料片。
5.权利要求1所述的透气性复合隔离布,其中隔离层是经过压光的熔喷料片,该熔喷料片具有每平方米25克的基重。
6.权利要求1所述的透气性复合隔离布,其中薄膜层是穿孔膜,以便消除作用于用户的潜在热应激。
7.权利要求1所述的透气性复合隔离布,其中高强度无纺料片层、隔离层和薄膜层中的一层或多层包括UV。
8.权利要求1所述的透气性复合隔离布,其进一步包括内涂层,该内涂层被构造成从用户的皮肤吸除汗。
9.防护服,其包括:
身体部分,在其顶部肩线处具有颈部开口;
从身体部分延伸的两个袖部分,每个袖部分具有内边缘和外边缘;和
从身体部分延伸的两个腿部分,
其中,防护服的各部分由透气性复合隔离布制成,该透气性复合隔离布包括:
高强度无纺料片层;
薄膜层;和
布置在高强度无纺料片层和薄膜层之间的隔离层,该隔离层具有每平方米25克的基重;
其中,所述透气性复合隔离布能够以大于99%的效率滤除0.3微米的粒子。
10.权利要求9所述的防护服,其中隔离布被构造成在20帕的差压下允许每分钟7立方英尺(CFM)和9CFM之间的空气传递。
11.权利要求9所述的防护服,其中利用粘合剂结合将高强度无纺料片层结合到隔离层。
12.权利要求9所述的防护服,其中高强度无纺料片层是具有每平方米30克的基重的纺粘料片。
13.权利要求9所述的防护服,其中隔离层是经过压光的熔喷料片,该熔喷料片具有每平方米25克的基重。
14.权利要求9所述的防护服,其中薄膜层是穿孔膜,以便消除作用于用户的潜在热应激。
15.权利要求9所述的防护服,其中高强度无纺料片层、隔离层和薄膜层中的一层或多层包括UV。
16.权利要求1所述的防护服,其中进一步包括内涂层,该内涂层被构造成从用户的皮肤吸除汗。
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JP2013500882A (ja) 2013-01-10
US20110179558A1 (en) 2011-07-28
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