CN101978009A - 聚烯烃膜和其用途 - Google Patents
聚烯烃膜和其用途 Download PDFInfo
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- CN101978009A CN101978009A CN2009801103750A CN200980110375A CN101978009A CN 101978009 A CN101978009 A CN 101978009A CN 2009801103750 A CN2009801103750 A CN 2009801103750A CN 200980110375 A CN200980110375 A CN 200980110375A CN 101978009 A CN101978009 A CN 101978009A
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- CN
- China
- Prior art keywords
- film
- polyolefin film
- adhesive tape
- aforementioned
- polyolefin
- 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
Links
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
- B31D1/0062—Multiple-step processes for making flat articles ; Making flat articles the articles being adhesive strips or tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
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Abstract
本发明涉及一种聚烯烃膜,尤其是用于胶带的聚烯烃膜,其是沿纵向单轴取向的,其特征在于所述膜包括烯烃聚合物和极性非烯烃聚合物的混合物。
Description
本发明涉及聚烯烃膜,其是沿纵向单轴取向的,并且涉及其用途。
具有高纵向强度的膜通常通过对挤出的膜幅面(film web)进行取向而获得,所述膜幅面包括部分结晶的热塑性材料。所述的取向主要是双轴的。例外的是,仅对该膜在纵向进行取向,从而获得纵向拉伸强度的进一步增加。但是,与由吹塑薄膜工艺或者流延薄膜工艺得到的未取向的膜相反,基于聚丙烯的不仅商业上通常的双轴取向膜而且单轴取向的膜都具有低的横向抗撕裂蔓延性。
在操作实践中,在边缘受损(由于在切开的过程中钝刀的结果或者后续的对切开边的非故意损害的结果)的情况下,这导致所述膜或者由其产生的胶带易于在拉伸载荷被撕掉。
在严格要求刚性(在非常低的伸长率时拉伸应力高)和横向抗撕裂蔓延性时,使用长丝或者使用由玻璃或者塑料制成的长丝的网对膜和胶带进行增强。从设备的观点来看,生产这种长丝胶带是非常复杂的,并且因此导致昂贵和易于出错。不仅需要所述基础膜,而且还需要所述长丝和层压粘合剂(或者另外的压敏粘合剂涂层),这使得该产品甚至更昂贵。这种长丝胶带的其它缺点是抗折断性低,厚度大,撕裂边不整齐,并且缺乏可焊性和可回收性。例如,这种类型的胶带的生产描述于US 4,454,192A1中。
EP 0255866A1提供了一种双轴或者纵向取向的聚丙烯膜。但是,所述的添加聚乙烯来增加横向的拉伸冲击韧性,导致纵向上刚性降低和横向抗撕裂蔓延性降低。纵向的拉伸比为1∶5.5至1∶7。获得12至355N/mm2的拉伸强度。没有详细提供10%伸长率的张力和横向抗撕裂蔓延性。
在二十世纪八十年代末期,Beiersdorf(Hamburg,Germany)公司上市了一种撕开型胶带(tear-open strip),其显示出降低的被撕掉的趋势。它包括来自NOPI(Harrislee,Germany)公司的纵向取向的载体膜,其通过共挤出具有不同韧性的原料制成,并且拉伸比为1∶7.5。根据冲击改性的原理操作时,当产品用锋利的刀切开时,坚韧的外部共挤出层减少微裂纹(microtears)的形成。但是,它不防止接下来损害的边导致的撕裂(例如,当该辊运送或者施加到纸板箱时),这需要显著更高的抗撕裂蔓延性。外层含有60wt%的聚丙烯共聚物(其具有约5wt%的乙烯),和增加韧性的40wt%的SBS橡胶,这损害了光稳定性并且导致该膜在纵向的尤其是降低的拉伸强度(160N/mm2)和降低的在10%伸长率的应力(70N/mm2)。韧性较低的主要层含有92wt%的聚丙烯共聚物和8wt%的SBS橡胶。所述SBS橡胶将具有相同拉伸比的纯聚丙烯共聚物的单层膜的抗撕裂蔓延性从约240N/mm降低至70N/mm。
DE 4402444A1涉及一种胶带,其具有拉伸强度,基于单轴取向的聚乙烯。也可在某些方面获得类似于相应的聚丙烯产品的机械性质。但是,聚乙烯的热稳定性显著低于聚丙烯,这在生产胶带(粘合剂层或者其它层在炉中干燥)时和在接下来的包装应用例如作为夹紧带(grip tape),纸板箱密封胶带,撕开型胶带或者纸板箱增强条(carton reinforcement strip)中都是明显不利的。纸板箱上的胶带常常例如在通过印刷机之后或者在填充了热产品(例如食物)之后变热。聚乙烯膜(包括取向的PE膜)的另一缺点是,其在10%伸长率的力显著低于聚丙烯膜。由于对于给定力的高伸长率,由这种膜制成的夹紧带或者纸板箱密封胶带往往会在拉伸载荷下脱离,而纸板箱增强条不能防止纸板箱的撕裂。没有披露纵向的拉伸比和在10%伸长率的应力。获得102至377N/mm2的拉伸强度。
以上所述的发明具有某些既有应用,但是可获得的拉伸强度和抗撕裂蔓延性不接近于长丝胶带。因此,一直尝试避免涉及到许多长丝的应用,并且尝试通过纵向结构得到取向膜长丝状性质,如下描述。
US 5,145,544A1和US 5,173,141A1描述一种胶带,其包括单轴取向的膜,该膜具有用于增强的肋条结构,一些肋条从表面上突出,并且一些肋条包埋在该膜表面中。在膜和肋条之间形成缺口状接头(notch-like joints)。该发明获得横向的高剪切强度,但是所述拉伸强度和可伸长性仍然需要改进。但是,主要的缺点是根据该发明的膜不能以工业规模生产。这里的原因是在通常的宽度上取向性差,以及平面度极差,这意味着不再确保使用压敏粘合剂涂覆所述膜的可能性。此外,在高宽度时,存在由于不均匀和接下来在取向过程中在拉伸辊上的粘着力不够(由于该膜没有放平而导致)导致的平面度进一步劣化。在典型的生产宽度制造的情况下,将中间区域的膜以横向保持在拉伸辊上,结果是肋条结构被取向作用改变,并且整个产品的品质变得不均匀。进一步的缺点是必需使用压延机来赋予至少50%包埋的肋条;压延机涉及到非常高的资本花费,并且使该工艺复杂得多。当在形成胶带的进一步加工过程中使用脱模剂或者底漆时,在该表面上的肋条结构也容易导致涂覆缺陷,这是因为膜的施涂技术需要光滑表面。在膜的表面中增强单丝或者肋条结构的印迹对于印刷工艺是有害的,印刷工艺需要光滑的表面。尤其是在该发明的膜用于包装胶带的情况下,可印刷性对于客户来说是一个重要的标准。
US 5,145,544A1披露了拉伸比为1∶7,拉伸强度为157至177N/mm2;在10%伸长率的应力未确定。US 5,173,141A1披露了拉伸比为1∶6.1至1∶7,和拉伸强度为至多245N/mm2;在10%伸长率的应力未确定。
EP 1101808A1试图通过将肋条结构插入到膜的内部来克服所述的缺点。该膜具有平面平行的外部表面,并且包括至少两个具有不同组成的共挤出层,其界面不是平的,而边界形状的横截面是非线性的,并且这种形状以层状方式在纵向上是连续的。该膜的特殊内部结构源自周期性地或者不规则地在横向上变化的层厚度,以及第二层以一种方式弥补厚度的波动,使得总厚度基本上是恒定的。所有所述的发明都相对于标准胶带膜在纵向显示出改善的拉伸强度和弹性模量。拉伸比为1∶6.7和1∶8.7之间。获得202至231N/mm2的拉伸强度,和103至147N/mm2的在10%伸长率的应力。
这些发明都没有工业应用,这是因为这些生产方法非常苛刻。此外,它们远远达不到匹配玻璃或者聚酯长丝产品的性质。
本发明的目的是提供一种膜,尤其是用于胶带的膜,其不具有所述的现有技术的膜的缺点。
这个目的通过本发明的膜达到。本发明进一步描述本发明的有利的实施方式。本发明的观念还涵盖本发明的膜的用途。
因此,本发明提供聚烯烃膜,其是沿纵向单轴取向的,并且包括烯烃和极性非烯烃聚合物的混合物。
极性非烯烃聚合物在混合物中的分率优选为5wt%至30wt%。
为了获得高的拉伸强度,在10%伸长率的高张力,和高抗撕裂蔓延性,应该选择拉伸操作中的条件,使得拉伸比对于特定的膜来说是技术上可实现的最大值。根据本发明,纵向的拉伸比为至少1∶4.5,优选至少1∶7。
例如1∶6的拉伸比表明长度1m的初级膜部分(section of primary film)形成为长度为6m的拉伸膜部分。拉伸比也常常确定为取向之前的线速度与取向之后的线速度的比。以下所用的数值与拉伸操作相关。
在本发明的一种优选的实施方式中,该膜的性质如下:
·纵向的拉伸强度为至少200N/mm2,优选至少300N/mm2,更优选至少400N/mm2,
·纵向的在10%伸长率的应力为至少150N/mm2,优选至少200N/mm2,更优选至少250N/mm2,和/或
·横向抗撕裂蔓延性为至少400N/mm,优选至少800N/mm,更优选至少1500N/mm。
通过用基于宽度的力值除以厚度计算强度数值。当在胶带上测定强度值时,作为基础的厚度不是胶带的总厚度,而仅仅是载体膜的厚度。
该载体膜的厚度优选为15和200μm之间,更优选在30和140μm之间,非常优选在50和90μm之间。
烯烃聚合物是烯烃例如乙烯、丙烯或者丁烯的均聚物或者共聚物。术语共聚物在此处逻辑上应该理解为包括三元共聚物。
所述烯烃聚合物优选包括至少50wt%的丙烯,和更优选为丙烯均聚物。
用于膜的特别合适的基础材料是可商购的聚丙烯均聚物,或聚丙烯共聚物,包括嵌段(冲击)聚合物和无规聚合物。
所述聚合物的熔体指数必需处于适合用于平膜挤出的范围内。这个范围应该为0.3和15g/10min之间,优选为0.8至5g/10min(在230℃/2.16kg条件测得)。
所述聚丙烯优选为主要是全同立构的结构。所述挠曲模量应该为至少1000MPa,优选至少1500MPa,非常优选至少2000MPa。
极性非烯烃聚合物包括所有的如下聚合物,该聚合物a)不含有烯烃单体例如乙烯,丙烯或者丁烯,和b)包含作为极性组分的杂原子例如硫、氮、磷和-优选-氧。所述极性非烯烃聚合物优选选自聚酯,聚酰胺,聚氨酯,聚甲醛,聚亚芳基硫醚,和聚亚芳基醚。部分结晶的聚合物是特别优选的。在本发明的一种特别有利的实施方式中,极性非烯烃聚合物选择为聚对苯二甲酸丁二醇酯和/或聚甲醛。
在优选的实施方式中,所述基质由烯烃聚合物构成,其中极性非烯烃聚合物以纤维的形式包埋在所述烯烃聚合物中。
所述纤维的直径优选为0.01至50μm,更优选0.1至20μm。
纤维的尺寸以及因此该膜的机械性质可通过制备过程和通过向混合物中添加极性改性的聚烯烃作为第三组分而调节。
所述极性改性的聚烯烃优选选自烯烃与乙烯基酯、甲基丙烯酸和丙烯酸及其酯的共聚物,更优选乙烯-乙酸乙烯酯共聚物和乙烯-(甲基)丙烯酸酯共聚物,,或者选自具有不饱和的有机酸的接枝聚合物,更优选马来酸酐-、甲基丙烯酸-或者丙烯酸-接枝的聚烯烃,而极性改性的聚烯烃在混合物中的分率优选为0.2%至10wt%。
该膜中的聚合物可以以纯的形式或者以与添加剂的共混物使用,所述添加剂例如抗氧化剂,光稳定剂,防粘连剂,润滑剂,和加工助剂,填料,染料,颜料,发泡剂或成核剂。
该膜可用作例如胶带的载体。这种类型的胶带适合用于增强硬纸板包装,尤其是在模切的区域中,作为纸板箱的撕开型胶带,和用于打捆制品。这些制品的实例包括管材、型材或者堆叠的纸板箱(stacked cartons)(打捆应用)。由于本发明的膜实际上不可能横向撕裂,甚至是在边缘受损的情况下也是这样,所以可防止撕裂除去撕开型胶带的情况,或者连续撕开增强的纸板箱模切处的情况。在这些膜中,撕裂往往会沿纵向进行,而这在边损害或者部分模切的情况下通过将撕裂转向至纵向而防止了横向的撕裂除去。
用于生产该膜的优选方法,或者用于使用该生产本发明的胶带的优选方法,包括以下步骤:
·将聚合物和添加剂(当使用时)混合,并且供应至挤出机中到达平膜模头。
·使熔融膜在冷却辊上经受受控的冷却。
·在所述膜幅面经过拉伸设备之前,通加热辊将其加热至合适的拉伸温度。
·然后使该膜在机器方向经受短间隙取向(short-gap orientation)。
·通过涂覆对该载体膜提供粘合剂,或者甚至是之前通过共挤出提供粘合剂。
所述膜可为单层或者多层;优选它是多层,更优选为ABC类型,其中B包括本发明的混合物,而A和/或C全部或者主要由聚烯烃聚合物构成。在没有共挤出层的这种类型的膜中,纤维可出现在该膜的表面上,并且可能在进一步加工过程中导致破坏(disruption)。这尤其是适用的是,在特别高的取向下目标是获得在1%和10%的伸长率下的高应力值的情况。共挤出使得纤维在膜的取向过程中沉积(deposition),和避免了在使用脱模剂、底漆或者粘合剂涂覆的过程中的问题。因此优选结构为ABA的三层膜,其中B包括本发明的混合物,外层A由至少一种聚烯烃构成。层A的聚烯烃优选为层B的聚烯烃或者为聚丙烯均聚物。对于一个或者多个A层或者对于A层和B层已经显然的是另一优点是该膜在横向上较高的韧性。结果,该膜往往在横向载荷下不太会撕裂。此外,也增加了垂直于该膜表面的韧性;换句话说,在存在涂层缺陷的情况下(局部没有通过该膜的静电涂覆(electrostatic charging)得到的的脱模涂层),撕碎的危险性(该膜在第三个方向上劈开)降低。
可通过层压、压花或者辐射处理对该膜进行改性。
可对该膜进行表面处理。对于促进粘合的目的,这些是例如电晕处理,火焰处理,氟处理或者等离子体处理,或者涂覆溶液或分散体或者液态可辐射固化的物质。
其它可能的涂层是印刷的涂层和不粘连的涂层,实例是以下那些:交联的有机硅,丙烯酸酯类(205,例如),使用偏二氯乙烯或者氯乙烯作为单体的聚合物,或者硬脂基化合物例如聚乙烯基硬脂基氨基甲酸酯或者硬脂酸铬络合物(C,例如)或者马来酸酐共聚物和硬脂基胺的反应产物。
根据本发明的优选的胶带是具有自粘合的粘合剂层或者可热活化的粘合剂层的膜。但是,所述粘合剂优选不为可密封的粘合剂,而是压敏粘合剂。对于胶带应用,将压敏粘合剂以溶液或者分散体的形式或者以100%的形式(例如熔体),或者通过与该膜共挤出,涂覆到该膜的一侧或者两侧上。该粘合剂层可通过热或者高能辐射而交联,并且能够在必要时使用隔离膜或者隔离纸加衬里。特别合适的是基于丙烯酸酯、天然橡胶、热塑性苯乙烯嵌段共聚物或者有机硅的压敏粘合剂。
对于本发明的目的,一般性表述″胶带″包括所有的片状结构,例如二维拉伸膜或者膜部分,具有延长的长度和有限的宽度的带,带部分等,以及,最后包括模切件或者标签。
为了最优化性质的目的,可将所用的自粘合组合物与一种或者多种添加剂共混,所述添加剂例如增粘剂(树脂),增塑剂,填料,颜料,UV吸收剂,光稳定剂,老化抑制剂,交联剂,交联促进剂或者弹性体。
用于共混的合适的弹性体是例如EPDM橡胶或者EPM橡胶,聚异丁烯,丁基橡胶,乙烯乙酸乙烯酯共聚物,二烯的氢化嵌段共聚物(例如,通过氢化SBR、cSBR、BAN、NBR、SBS、SIS或者IR得到的那些;这些聚合物例如称为SEPS和SEBS),或者丙烯酸酯类共聚物例如ACM。
增粘剂的实例是烃树脂(例如由不饱和的C5或者C7单体制成),萜酚树脂,由原料例如α-或者β-蒎烯制成的萜烯树脂,芳族树脂例如香豆酮-茚树脂,或者苯乙烯或者α-甲基苯乙烯的树脂,例如松香及其衍生物,例如歧化松香,二聚的或者酯化的树脂,在这种情况下可使用二醇,甘油或者季戊四醇。尤其合适的是没有烯属双键的对老化稳定的树脂,例如氢化树脂。
合适的填料和颜料例如炭黑,二氧化钛,碳酸钙,碳酸锌,氧化锌,硅酸盐或者二氧化硅。
对于该粘合剂合适的UV吸收剂,光稳定剂,和老化抑制剂是在本说明书的对于膜的稳定化部分所记载的相同的那些。
合适的增塑剂的实例包括脂肪族、脂环族和芳族矿物油,邻苯二甲酸、偏苯三酸或者己二酸的二酯或者聚酯,液体橡胶(例如腈橡胶或者聚异戊二烯橡胶),丁烯和/或异丁烯的液体聚合物,丙烯酸酯类,聚乙烯基醚,基于用于增粘剂树脂的原料的液体树脂和增塑剂树脂,羊毛蜡和其它蜡,或者液体有机硅。
交联剂的实例包括酚醛树脂或者卤化酚醛树脂,三聚氰胺树脂和甲醛树脂。合适的交联促进剂是例如马来酰亚胺,烯丙基酯例如氰尿酸三烯丙酯,和丙烯酸和甲基丙烯酸的多官能酯。
一种优选的实施方式包括由天然橡胶、烃树脂和抗氧化剂构成的压敏粘合剂。
粘合剂涂层的厚度优选为18至50g/m2,更尤其是22至29g/m2。胶带卷的宽度优选为2至60mm。
试验方法
厚度:DIN 53370
拉伸强度:DIN 53455-7-5,沿纵向
在10%伸长率的应力:DIN 53455-7-5,沿纵向
断裂伸长率:DIN 53455-7-5,沿纵向
横向拉伸冲击韧性:DIN EN ISO 8256
·(夹持长度10mm,7.5J摆锤,5层,30g轭(yoke))
横向抗撕裂蔓延性:DIN 53363-2003-10
PP的熔体指数:DIN 53735(230℃,2.16kg)
PBT的熔体指数:DIN 53735(250℃,2.16kg)
POM/EVAL/PE-LLD的熔体指数:DIN 53735(190℃,2.16kg)
PS-HI的熔体指数:DIN 53735(200℃,5kg)
挠曲模量:ASTM D 790A
工业粘合性数据(Technical adhesive data):AFERA 4001(对应于DIN EN1939)
下文的目的是使用实施例说明本发明,而不是由此限制本发明。
实施例
原料
Dow 7C06:
PP嵌段共聚物,MFI 1.5g/10min,未加入成核剂的(non-nucleated),挠曲模量1280MPa(Dow Chemical)
Bormod HD 905CF:
PP均聚物,MFI 6g/10min,挠曲模量2150MPa,含有α-成核剂(Borealis)
Dowlex 2032:
PE-LLD,MFI 2g/10min(Dow Chemical)
Styron 457
PS-HI,MFI 3g/10min,挠曲模量2200MPa(Dow Chemical)
EVAL G156B:
EVAL,乙烯含量48mol%,MFI 6.4g/10min,挠曲模量2800MPa(EVALEurope)
Licocene PP MA 7452GR TP:
PP-g-MA,马来酸酐-接枝的茂金属聚丙烯蜡(Clariant)
Hostaform C9021natural:
POM,MFI 8g/10min,挠曲模量2800MPa(Ticona)
Celanex 2002-2natural:
PBT,MFI 20,挠曲模量2500MPa(Ticona)
实施例1
在单螺杆挤出装置上使用具有柔性模唇的扁平模头在一个层中生产该膜,并用下游冷却辊站和单级短间隙拉伸装置(single-stage short-gap drawingunit)处理。
将Dow 7C06,Celanex 2002-2natural,和Licocene PP MA 7452GR TP以15∶4∶1的比例混合,并挤出混合物。模头温度为230℃。设置冷却辊温度和拉伸辊温度,使得膜在拉伸操作之前和之后该膜的结晶度尽可能高。拉伸比为1∶5。
膜性质:
在拉伸之后的载体厚度/μm 80
在1%伸长率的应力/MPa 23.6
在10%伸长率的应力/MPa 154
拉伸强度/MPa 220
断裂伸长率/% 26
抗撕裂蔓延性/N/mm 1220
横向拉伸冲击韧性/mJ/mm2 63
将该膜的两侧都用电晕预处理,顶面上涂覆PVSC在甲苯中的0.5%浓度溶液,作为脱模剂,并干燥。将粘合剂混入熔体中,所述熔体由42wt%的SIS弹性体,20wt%的氢化松香的季戊四醇酯,37wt%的R&B值为85℃的C5烃树脂,和1wt%的1010抗氧化剂制备;在150℃将该混合物使用模头施涂至该膜的底面。然后将胶带卷绕形成备用卷(stock roll),为了进一步的测试,将其切成15mm的宽度。
技术上的粘合性数据:
·对钢的粘结强度 2.4N/cm
·在0.3m/min的展开力 1.0N/cm
·涂层重量 24g/m2.
实施例2
在共挤出装置上使用具有柔性模唇的扁平模头将所述膜生产为ABA结构的三个层,并用下游冷却辊站和单级短间隙拉伸单元(single-stageshort-gap drawing unit)处理。两个外层都由Bormod HD 905CF构成。中间层由以44∶5∶1的比例混合的Bormod HD 905CF,Hostaform C9021natural,和EVAL G156B构成。模头温度为230℃。设置冷却辊温度和拉伸辊温度,使得膜在拉伸操作之前和之后该膜的结晶度尽可能高。拉伸比为1∶8。
膜性质:
拉伸之后的载体厚度/μm 60
在10%伸长率的应力/MPa 264
拉伸强度/MPa 297
抗撕裂蔓延性/N/mm 1600
断裂伸长率/% 12.7
横向拉伸冲击韧性/mJ/mm2 150
将该膜的两侧都用电晕预处理,顶面涂覆不含溶剂的有机硅,接着将其用UV辐射交联。该底面提供有由天然橡胶、环化橡胶和4,4′-二异氰酸基二苯基甲烷构成的底漆。在捏合设备中将所述粘合剂溶于己烷中,所述粘合剂包括40wt%的天然橡胶SMRL(Mooney 70),10wt%的二氧化钛,37wt%的R&B值为95℃的C5烃树脂,和1wt%的BKF抗氧化剂。将20wt%的粘合剂使用涂覆棒施用至该膜的涂底漆的底面上,并且在115℃干燥。然后将胶带卷绕形成备用卷,为了进一步的测试,将其切成15mm的宽度。
技术上的粘合性数据:
·对钢的粘结强度 1.8N/cm
·在0.3m/min的展开力 0.3N/cm
·涂层重量 23g/m2.
对比例1
以与实施例1中相同的方式由Dow 7C06生产膜和胶带,拉伸比为1∶6.1。
膜性质:
拉伸之后的载体厚度/μm 80
在1%伸长率的应力/MPa 16
在10%伸长率的应力/MPa 142
拉伸强度/MPa 247
断裂伸长率/% 32
抗撕裂蔓延性/N/mm 240
横向拉伸冲击韧性/mJ/mm2 258
对比例2
将Dow 7C06和Styron 457以4∶1的比例混合,并由此混合物以与实施例1中相同的方式生产膜和胶带,拉伸比为1∶8。
膜性质:
拉伸之后的载体厚度/μm 70
在1%伸长率的应力/MPa 12
在10%伸长率的应力/MPa 222
拉伸强度/MPa 260
断裂伸长率/% 39
抗撕裂蔓延性/N/mm 217
横向拉伸冲击韧性/mJ/mm2 312
对比例3
将Dow 7C06和Dowlex 2032以41∶9的比例混合,并由此混合物以与实施例1中相同的方式生产膜和胶带,拉伸比为1∶6.4。
膜性质:
拉伸之后的载体厚度/μm 120
在1%伸长率的应力/MPa 30.3
在10%伸长率的应力/MPa 174
拉伸强度/MPa 335
断裂伸长率/% 33.4
抗撕裂蔓延性/N/mm 284
横向拉伸冲击韧性/mJ/mm2 240
Claims (13)
1.一种聚烯烃膜,尤其是用于胶带的聚烯烃膜,其是沿纵向单轴取向的,
其特征在于
所述膜包括烯烃聚合物和极性非烯烃聚合物的混合物。
2.权利要求1的聚烯烃膜,
其特征在于
所述混合物中极性非烯烃聚合物的分率为5wt%至30wt%。
3.权利要求1或2中的聚烯烃膜,
其特征在于
所述非烯烃聚合物是丙烯的均聚物或者共聚物。
4.权利要求1至3中至少一项的聚烯烃膜,
其特征在于
所述膜包括烯烃聚合物基质,所述烯烃聚合物基质中包埋有所述极性非烯烃聚合物的纤维,所述纤维的直径优选为0.01至50μm,更优选0.1至20μm。
5.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述膜具有以下性质:
·纵向的拉伸比为至少1∶4.5,优选至少1∶7,
·纵向的拉伸强度为至少200N/mm2,优选至少300N/mm2,更优选至少400N/mm2,
·纵向的在10%伸长率的应力为至少150N/mm2,优选至少250N/mm2,和/或
·横向的抗撕裂蔓延性为至少400N/mm,优选至少800N/mm,更优选至少1500N/mm。
6.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述膜的厚度为15至200μm,优选30至140μm,更优选50至90μm。
7.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述烯烃聚合物包括其量为至少50wt%的丙烯,并且优选为丙烯均聚物。
8.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述极性非烯烃聚合物选自:聚酯,聚酰胺,聚甲醛,聚亚芳基硫醚,聚亚芳基醚,和聚氨酯,优选聚对苯二甲酸丁二醇酯,和所述非烯烃聚合物优选为部分结晶的。
9.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述混合物包括作为第三组分的极性改性的聚烯烃,其优选选自烯烃与乙烯基酯、甲基丙烯酸和丙烯酸的共聚物,更优选乙烯-乙酸乙烯酯共聚物和乙烯-(甲基)丙烯酸酯共聚物,及其酯,或者选自具有不饱和有机酸的接枝共聚物,更优选马来酸酐-、甲基丙烯酸-或者丙烯酸-接枝的聚烯烃,和在该混合物中极性改性的聚烯烃的分率优选为0.2wt%至10wt%。
10.前述权利要求中至少一项的聚烯烃膜,
其特征在于
所述膜在一个外表面上和优选在两个外表面上具有共挤出层,所述共挤出层全部或者主要由聚烯烃聚合物构成。
11.前述权利要求中至少一项的聚烯烃膜作为包装膜或者打包膜的用途。
12.前述权利要求中至少一项的聚烯烃膜作为胶带中的载体膜的用途。
13.前述权利要求中至少一项的聚烯烃膜作为胶带中的载体膜的用途,所述胶带尤其是用于增强纸板包装,尤其是在模切的区域中;所述胶带作为纸板箱的撕开型胶带,或者所述胶带用于打包制品。
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US6432527B1 (en) * | 1999-12-14 | 2002-08-13 | 3M Innovative Properties Company | Embossed film having controlled tear |
DE10332135A1 (de) * | 2003-07-16 | 2005-02-17 | Clariant Gmbh | Verwendung von Wachsen als Modifizierungsmittel für Füllstofffe |
EP1719809A3 (en) * | 2005-05-06 | 2007-05-30 | Eastman Chemical Company | Pressure sensitive adhesive (PSA) laminates |
DE202006002019U1 (de) * | 2006-02-07 | 2006-08-10 | Tesa Ag | Durch Filamente verstärktes Klebeband |
DE102006034252A1 (de) * | 2006-07-21 | 2008-01-24 | Tesa Ag | Monoaxial verstreckte Polypropylenfolie mit hohem Weiterreißwiderstand in Querrichtung |
DE102006061812A1 (de) * | 2006-12-21 | 2008-07-03 | Tesa Ag | Mehrlagiges Klebeband |
DE102008005565A1 (de) * | 2008-01-22 | 2009-07-23 | Tesa Ag | Folie aus Polypropylen, Verwendung derselben sowie Verfahren zur Herstellung der Folie |
WO2009092715A1 (de) * | 2008-01-22 | 2009-07-30 | Tesa Se | Trägerfolie insbesondere für ein klebeband und verwendung derselben |
DE102008058537A1 (de) * | 2008-11-21 | 2010-05-27 | Tesa Se | Verwendung eines Streifen eines Klebebands zur Verstärkung von Kartonagen insbesondere im Bereich von Stanzungen und gleichzeitig als Aufreißstreifen für diese Kartonagen |
-
2008
- 2008-01-22 DE DE200810005561 patent/DE102008005561A1/de not_active Withdrawn
-
2009
- 2009-01-12 DE DE112009000115T patent/DE112009000115A5/de not_active Withdrawn
- 2009-01-12 EP EP20090704000 patent/EP2235128B1/de not_active Not-in-force
- 2009-01-12 CN CN2009801103750A patent/CN101978009A/zh active Pending
- 2009-01-12 JP JP2010543458A patent/JP2011512423A/ja not_active Withdrawn
- 2009-01-12 WO PCT/EP2009/050269 patent/WO2009092641A1/de active Application Filing
- 2009-01-12 US US12/863,946 patent/US20110014450A1/en not_active Abandoned
- 2009-01-12 CA CA 2713079 patent/CA2713079A1/en not_active Abandoned
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103648917A (zh) * | 2011-05-05 | 2014-03-19 | 德莎欧洲公司 | 用于形成撕开条的胶带系统 |
US9604753B2 (en) | 2011-05-05 | 2017-03-28 | Tesa Se | Adhesive-tape system for forming a tear-open strip |
CN102942879A (zh) * | 2011-08-15 | 2013-02-27 | 澳新粘胶科技(湖北)有限公司 | 多层共挤膜胶带 |
CN106103078A (zh) * | 2014-03-21 | 2016-11-09 | 德国英菲亚纳有限责任两合公司 | 包装 |
CN106103087A (zh) * | 2014-03-21 | 2016-11-09 | 德国英菲亚纳有限责任两合公司 | 具有离型作用的多层塑料薄膜 |
CN106103087B (zh) * | 2014-03-21 | 2018-09-07 | 德国英菲亚纳有限责任两合公司 | 具有离型作用的多层塑料薄膜 |
CN105131431A (zh) * | 2015-10-15 | 2015-12-09 | 昆山金华安电子科技有限公司 | 抗老化建筑外墙用自粘保护膜 |
CN105131431B (zh) * | 2015-10-15 | 2017-08-04 | 昆山金华安电子科技有限公司 | 抗老化建筑外墙用自粘保护膜 |
CN112119136A (zh) * | 2018-06-28 | 2020-12-22 | 东亚合成株式会社 | 粘合片材 |
CN112119136B (zh) * | 2018-06-28 | 2022-06-10 | 东亚合成株式会社 | 粘合片材 |
CN111331806A (zh) * | 2018-12-19 | 2020-06-26 | 德莎欧洲股份公司 | 制造胶粘剂丝的方法和胶粘剂丝 |
Also Published As
Publication number | Publication date |
---|---|
EP2235128B1 (de) | 2012-06-20 |
WO2009092641A1 (de) | 2009-07-30 |
JP2011512423A (ja) | 2011-04-21 |
DE102008005561A1 (de) | 2009-07-23 |
DE112009000115A5 (de) | 2011-02-17 |
CA2713079A1 (en) | 2009-07-30 |
EP2235128A1 (de) | 2010-10-06 |
US20110014450A1 (en) | 2011-01-20 |
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Application publication date: 20110216 |