CN107177320A - 具有弱粘附衬垫材料的复合材料体系 - Google Patents
具有弱粘附衬垫材料的复合材料体系 Download PDFInfo
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- CN107177320A CN107177320A CN201710142224.XA CN201710142224A CN107177320A CN 107177320 A CN107177320 A CN 107177320A CN 201710142224 A CN201710142224 A CN 201710142224A CN 107177320 A CN107177320 A CN 107177320A
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- Prior art keywords
- adhesive tape
- layer
- pressure
- sensitive adhesive
- formation
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Classifications
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
具有压敏胶粘剂侧和热可活化的胶粘剂层的双面胶带,该压敏胶粘剂侧设有常规的剥离衬垫,该双面胶带以所谓的内衬保护热可活化的侧以容许该胶带在切割和卷绕单元上被稳定地引导、储存和运输。这由说明书中所述的复合材料体系形式的产品结构来实现。本申请还涉及用于制造这种复合材料体系的方法,以及胶带(B)的具体用途。
Description
技术领域
本发明总体上涉及胶带的技术领域,其正如不同地用于临时或长期地连接或遮蔽多个基底例如结构部件那样。本发明更具体地涉及复合材料体系,其包括两种以不同的方式配备的胶带,其中之一旨在用作所谓的内衬,并且基本上使得另一胶带能够尺寸稳定地卷绕和稳定地储存。
背景技术
胶带常常包括在一侧或两侧上装配有胶粘剂的基底。使用所述胶带允许容易地、快速地并且此时还非常有力地实现对一定范围的基底的粘结。经常涉及的是,使种类大不相同的基底彼此连接。在这种情况下,可为有利的是,拥有在两侧上设有胶粘剂的胶带,所述两种胶粘剂具有不同的性质。
例如,已知的是基于聚(甲基)丙烯酸酯的压敏胶粘剂,其对一系列的基底产生高的剥离粘附力(粘结力,粘结强度),以及,此外,在不同的外部条件下的粘结的长期稳定性是显著的。
替代地,热可活化的胶粘剂也已成为焦点。这些常包括聚烯烃,其特别地允许对热塑性和热固性基底两者的强力粘结。在热塑性基底的情况下,不仅胶粘剂而且基底也可处于熔融或软化状态,并因此材料可在表面上彼此渗透。这导致冷却后的高度稳定的接合(粘结)。在热固性基底的情况下,熔融的热活化胶粘剂能够有效地润湿基底,这同样导致冷却后的高的剥离粘附力。
具有不同胶粘剂的双面胶带例如描述于EP 0 384 598 A1中。具体地,所述文本公开了具有包括热可活化的聚烯烃胶粘剂的层的胶带,已通过接枝聚合将所选择的丙烯酸类单体的聚合物施加至该层。所述胶带进一步包括UV聚合的压敏性丙烯酸酯胶粘剂层,其甚至在暴露于热时粘附至热可活化的层。
类似的结构描述于US 4,563,388 A中。
EP 1 262 532 A1描述了一种胶带,其包括基于一种或多种烯烃单体的聚合物的热可活化的胶粘剂层,以及基于压敏性聚丙烯酸酯胶粘剂的压敏胶粘剂层。所述压敏胶粘剂层直接并持久地与热可活化的层粘结。
在一侧或两侧以胶粘剂涂覆的胶带通常通过卷绕以形成卷或卷筒(reel)来结束其生产过程。在双面胶带的情况下为了防止压敏胶粘剂彼此形成接触,或在单面胶带的情况下为了确保更容易地解卷(展开),在胶带卷绕之前用衬垫材料(还称作剥离材料)覆盖胶粘剂。这种衬垫材料已知为衬垫或剥离衬垫。除了单面或双面胶带的加衬之外,衬垫还用于包封标签。
这些剥离衬垫的另一功能是防止胶粘剂在应用之前的污染。通过剥离材料的性质和组成,可另外地配制剥离衬垫以允许用期望的力(轻或重的)使胶带解卷。在胶带于两侧涂覆有胶粘剂的情况下,剥离衬垫另外地确保了胶粘剂的合适的那侧在解卷期间首先暴露出来。
衬垫或剥离衬垫不是胶带或标签的组成部分,而是仅仅是其生产、储存或通过模切用于其进一步加工的辅助物。此外,与胶带载体不同的是,衬垫不是永久地与胶粘剂层粘结的。
包括压敏胶粘剂层和热可活化的胶粘剂层并且其压敏胶粘剂层加衬有剥离衬垫的双面胶带通常被卷绕以形成交叉卷绕(格子卷绕,lattice-wound)的长卷,也称为卷筒,并且因此在其生产和储存期间,经常在热可活化的层的那侧上设置另外的隔离衬垫。通常被称作“辅助衬垫”或者还被称作“内衬”的这种另外的剥离衬垫一般在两侧突出于胶带的宽度,并因此能够尤其防止卷绕胶带的侧边缘彼此粘连,也称为阻滞(阻塞,blocking)。
然而,所描述的包括热可活化的胶粘剂层和加衬有剥离衬垫的压敏胶粘剂层的胶带还具有以下特征:胶带和在压敏胶粘剂侧上的剥离衬垫形成的组件在两侧上是非粘性的。在这种类型的组件与位于热可活化的层的那侧上的内衬一起以幅面的形式通过切割机械时和/或在这种组件卷绕成卷筒时,其常常不能在其路径上被稳定地引导。特别地,在转向辊处以及在相对长的未引导的部分上,内衬与组件的其余部分分离。此外,在胶带的储存和运输期间,内衬经常滑动,并因此导致胶带表面的损坏。
发明内容
本发明的目的于此在于提供补救措施并且避免刚刚描述的缺点。特别地,本发明使得可提供具有热可活化的胶粘剂层和压敏胶粘剂侧的双面胶带,所述压敏胶粘剂侧设有常规的剥离衬垫,其中通过内衬对热可活化侧进行保护,而不会不利地影响传送通过常规的切割和卷绕单元的稳定性。另一目的在于允许这些胶带被稳定地储存和稳定地运输,并且使表面损坏的风险最小化。
本发明的第一和一般主题为复合材料体系,其包括:
-胶带(A),其包括
-压敏胶粘剂层和
-热可活化的胶粘剂层;
-位于所述胶带(A)的压敏胶粘剂层上的剥离衬垫;和
-胶带(B),其包括
-载体材料,
-在所述载体材料的一侧上的剥离层,和
-在所述载体材料的与所述剥离层相反的那侧上的压敏胶粘剂层;
其中所述胶带(B)的压敏胶粘剂层与所述胶带(A)的热可活化的胶粘剂层直接接触,并且所述胶带(B)具有根据EN 1939:2003测定的不大于5N/cm的对所述胶带(A)的热可活化的胶粘剂层的剥离粘附力。
因此,这种体系包括具有压敏胶粘剂和热可活化的胶粘剂的双面胶带、以及位于所述压敏胶粘剂上的剥离衬垫、和微弱地粘附至所述热可活化的胶粘剂的胶带,其在背面具有剥离涂层并因此在上述意义上用作内衬。单面地-尽管相对弱地-以粘附的方式装配的内衬有利地产生了内衬和热可活化的层之间的实质上更稳定的粘结,所述热可活化的层在常规的储存温度下在室温下是非粘性的,这意味着在引导通过切割和卷绕单元的过程中以及在运输和储存的过程中,内衬的滑动和由此导致的对双面胶带的表面的损坏的可能性变得实质上更加困难。然而,内衬继续实现其实际功能,即在粘结之前保护双面胶带的侧边缘,并且可在使用所述胶带之前以施加最小的力的方式从双面胶带移除。
根据本发明,如在一般语言用法中常见的,压敏胶粘剂或压敏性胶粘剂(PSA)被理解为至少在室温下是持久粘性以及粘附性的物质。PSA的特征在于,可通过压力将其施加至基底上,并且在那里保持粘附,其中对所使用的压力和该压力的持续时间没有更详细地限定。一般来说,尽管根本上取决于PSA、温度和大气湿度以及基底的精确性质,但是短时间作用的最小压力(其不超过瞬间的温和的接触)就足以获得粘附效果;在其它情况下,可能需要较长时间地暴露于较高的压力下。
PSA具有特定的特征性的粘弹性质,其导致耐久的粘性和粘附性。PSA的特征是,当它们机械变形时,不仅存在粘性流动过程而且还存在弹性恢复力的出现。这两种过程在它们各自的份额(比例)方面相互具有特定的关系,这不仅取决于PSA的准确组成、结构和交联度,还取决于变形的速率和持续时间,以及取决于温度。
粘性流动的比例对于实现粘附性是必要的。只有由具有相对高的迁移性的大分子产生的粘性成分才允许对待粘结的基底的有效润湿和在其上的有效流动。高的粘性流动的成分导致高的压敏胶粘性(也称为粘性或表面粘性),并因此通常也导致高的剥离粘附力。由于缺乏可流动的成分,高度交联的体系和结晶的或已经历玻璃状固化的聚合物因此通常至少仅略有粘性或根本没有粘性。
成比例的弹性恢复力对于内聚的实现是必要的。它们例如由链非常长的高度卷曲的大分子、以及通过以物理或化学的方式交联的大分子产生,并且它们允许传递从事粘结的力。它们导致,粘结能够在长时间内充分承受作用在其上的长期负荷,例如以持续剪切负荷的形式。
为了更准确地描述和量化弹性和粘性成分的程度以及各成分彼此间的比例,使用通过动态机械分析(DMA)可测定的储能模量(G')和损耗模量(G”)的变量。G'是物质的弹性分数(比例)的量度,G”是粘性分数的量度。两个变量均取决于形变频率和温度。
所述变量可借助于流变仪来测定。在该情况下,使分析用的材料在例如板-板布置中暴露于正弦振荡剪切应力。在仪器以剪切应力控制操作的情况下,测量形变作为时间的函数,以及该形变相对于引入剪切应力的时间偏移。该时间偏移被确定为相位角δ。
储能模量G'如下定义:G'=(τ/γ)·cos(δ)(τ=剪切应力,γ=形变,δ=相位角=剪切应力向量和形变向量之间的相位移)。损耗模量G”的定义如下:G”=(τ/γ)·sin(δ)(τ=剪切应力,γ=形变,δ=相位角=剪切应力向量和形变向量之间的相位移)。
如果在23℃下,在100至101弧度/秒的形变频率范围内,G'和G"都至少部分地位于103至107Pa的范围内,则组合物通常被认为是PSA,并且被定义为用于本发明的目的的那些。“部分地”意为G'曲线的至少一部分(部段)位于由从100弧度/秒(包含端点)至101弧度/秒(包含端点)的形变频率范围(横坐标)和从103Pa(包含端点)至107Pa(包含端点)的G'值的范围(纵坐标)所定界的窗口内,并且G”曲线的至少一部分同样位于对应的窗口内。
用于胶带(A)的压敏胶粘剂层(以下也同义地称为“胶带(A)的PSA”)的材料基础根本上是任意的,条件是确保与本发明的复合材料体系的其它组分的相容性,以及作为压敏胶粘剂的功能。
胶带(A)的PSA层优选地包括聚(甲基)丙烯酸酯作为主要成分。“聚(甲基)丙烯酸酯”意为其单体基础由至少70重量%的丙烯酸、甲基丙烯酸、丙烯酸酯和/或甲基丙烯酸酯组成的聚合物,其中存在不小于50重量%的丙烯酸酯和/或甲基丙烯酸酯,在各自的情况下基于所讨论的聚合物的总单体组成。聚(甲基)丙烯酸酯通常通过丙烯酸和/或甲基丙烯酸单体以及任选的其它可共聚的单体的自由基聚合可获得。根据本发明,术语“聚(甲基)丙烯酸酯”不仅包括基于丙烯酸及其衍生物的聚合物,而且还包括基于丙烯酸和甲基丙烯酸及其衍生物的聚合物,以及基于甲基丙烯酸及其衍生物的聚合物。胶带(A)的PSA可包括一种或多种聚(甲基)丙烯酸酯。当存在两种或更多种聚(甲基)丙烯酸酯时,“主要成分”涉及全部聚(甲基)丙烯酸酯。
有利地,基于聚(甲基)丙烯酸酯的PSA相对于一系列基底具有高的剥离粘附力,此外,对环境影响的高稳定性以及长时间的稳定性也是显著的。
胶带(A)优选地包括发泡的压敏胶粘剂层(在下文中还同义地称作“发泡的PSA”或“胶带(A)的发泡的压敏胶粘剂”)。“发泡的PSA”是包括压敏胶粘剂基质材料和多个充气空腔的压敏胶粘剂,由此与不具有空腔的单纯的基质材料相比降低了该PSA的密度。原则上,发泡的PSA的基质材料的发泡可以任何所需的方式来实现。胶带(A)的发泡的压敏胶粘剂层优选地包括至少部分膨胀的空心微珠。这些是至少部分膨胀的微珠,其在其基本状态下是弹性和可膨胀的并且具有热塑性的聚合物壳。这些球体(在基本状态下)填充有低沸点的液体或液化气体。特别地,使用的壳材料包括聚丙烯腈、PVDC、PVC或聚丙烯酸酯。常规的低沸点的液体特别地为低级烷烃的烃例如异丁烯或异戊烷,并且在压力下以液化气体的形式封闭在聚合物壳中。对于这种微球体,术语“微球”也是常规的。
微球暴露于热导致外部聚合物壳软化。同时,壳内的液体形式的推进剂气体经历向其气态的转变。当这种情况发生时,微球不可逆地拉伸并且经历三维膨胀。当内部和外部压力彼此匹配时,膨胀结束。由于聚合物壳被保留,结果是闭孔泡沫。
多种类型的微球是可商购获得的,并且基本上在它们的尺寸(在未膨胀的状态下直径为6至45μm)和在它们膨胀所需的起始温度(75至220℃)方面有所不同。未膨胀的微球类型还可以具有约40至45重量%的固体比例或微球比例的水性分散体的形式获得,并且另外地可作为结合聚合物的微球(母料),例如在乙烯-乙酸乙烯酯中以约65重量%的微球浓度获得。微球分散体和母料、如未膨胀的微球同样适用于制造本发明的胶带(A)的发泡的PSA。
发泡的PSA还可使用所谓的预膨胀的空心微球体来产生。对于该组群,膨胀在引入聚合物基质之前进行。
优选地,根据本发明,不管使用空心微球体的形式和制备方式,胶带(A)的发泡的PSA层包括至少部分膨胀的空心微球体。特别优选地,由空心微球体形成的胶带(A)的发泡的PSA中的所有空腔的至少90%具有10至500μm、更优选地15至200μm的最大尺寸。
根据本发明,术语“至少部分膨胀的空心微球”应理解为意指与具有未膨胀的空心微球体的相同的胶粘剂相比,空心微球体已经经历至少一定程度的膨胀,使得PSA的密度降低至在技术上有意义的程度。这意指微气球不一定已经经历完全膨胀。“至少部分膨胀的空心微球”在各自的情况下优选地已膨胀至它们在未膨胀状态下的最大尺寸的至少两倍。
表述“至少部分膨胀的(地)”涉及单个空心微球体的膨胀状态,并且不打算意指仅有一些所讨论的空心微球体必须经历(初始)膨胀。因此,如果在胶粘剂中存在“至少部分膨胀的空心微球体”和未膨胀的空心微球体,那么这意味着未膨胀的(完全未膨胀的,即甚至未经历初始膨胀的)空心微球体不属于“至少部分膨胀的空心微球体”。
胶带(A)的发泡的PSA优选地包括聚(甲基)丙烯酸酯作为主要成分。这如上所述地对于胶带(A)的PSA进行理解。
胶带(A)的发泡的压敏胶粘剂的聚(甲基)丙烯酸酯可优选地源于下列单体组成:
a)式(I)的丙烯酸酯和/或甲基丙烯酸酯
CH2=C(RI)(COORII) (I),
其中RI为H或CH3且RII为具有4至14个碳原子、更优选地具有4至9个碳原子的烷基基团;
b)具有与交联剂物质呈反应性的官能团的烯属不饱和单体;
c)任选地可与单体(a)和(b)共聚合的另外的烯属不饱和单体。
特别优选地,如此选择单体a)、b)、和c)的比例,使得聚(甲基)丙烯酸酯具有≤15℃的玻璃化转变温度(在低频率下的DMA)。为此,有利的是,选择具有45至99重量%的比例的单体a),具有1至15重量%的比例的单体b)和具有0至40重量%的比例的单体c),在各自的情况下基于聚(甲基)丙烯酸酯的总单体组成。
更优选地,单体a)为塑化(增塑,plasticizing)和/或非极性的单体。因此,优选地,单体a)选自包括以下的组:丙烯酸正丁酯、甲基丙烯酸正丁酯、丙烯酸正戊酯、甲基丙烯酸正戊酯、丙烯酸正戊酯、丙烯酸正己酯、甲基丙烯酸正己酯、丙烯酸正庚酯、丙烯酸正辛酯、甲基丙烯酸正辛酯、丙烯酸正壬酯、丙烯酸异丁酯、丙烯酸异辛酯、甲基丙烯酸异辛酯、丙烯酸2-乙基己酯和甲基丙烯酸2-乙基己酯。
优选地,单体b)为具有能够与环氧基团反应的官能团的烯属不饱和单体。更优选地,单体b)各自包含选自由以下组成的组的至少一种官能团:羟基、羧基、磺酸和膦酸基团、酸酐官能团、环氧基团、和取代或未取代的氨基基团。
特别地,单体b)选自由以下组成的组:丙烯酸、甲基丙烯酸、衣康酸、马来酸、富马酸、巴豆酸、乌头酸、二甲基丙烯酸、β-丙烯酰氧基丙酸、三氯丙烯酸、乙烯基乙酸、乙烯基膦酸、马来酸酐、丙烯酸2-羟基乙酯、丙烯酸3-羟基丙酯、甲基丙烯酸2-羟基乙酯、甲基丙烯酸3-羟基丙酯、甲基丙烯酸6-羟基己酯、烯丙醇、丙烯酸缩水甘油酯和甲基丙烯酸缩水甘油酯。
原则上,作为单体c)考虑的是所有可与单体a)和与单体b)共聚的乙烯基官能化的化合物。通过单体c)的选择和用量,可有利地调节胶带(A)的发泡的压敏胶粘剂的性质。
单体c)更优选地选自由以下组成的组:丙烯酸甲酯、丙烯酸乙酯、丙烯酸正丙酯、甲基丙烯酸甲酯、甲基丙烯酸乙酯、丙烯酸苄酯、甲基丙烯酸苄酯、丙烯酸仲丁基酯、丙烯酸叔丁基酯、丙烯酸苯酯、甲基丙烯酸苯酯、丙烯酸异冰片酯、甲基丙烯酸异冰片酯、丙烯酸叔丁基苯酯、甲基丙烯酸叔丁基苯酯、甲基丙烯酸十二烷基酯、丙烯酸异癸酯、丙烯酸月桂酯、丙烯酸正十一烷基酯、丙烯酸硬脂基酯、丙烯酸十三烷基酯、丙烯酸二十二烷基酯、甲基丙烯酸环己酯、甲基丙烯酸环戊基酯、丙烯酸苯氧基乙基酯、甲基丙烯酸2-丁氧基乙酯、丙烯酸2-丁氧基乙酯、丙烯酸3,3,5-三甲基环己酯、丙烯酸3,5-二甲基金刚烷基酯、甲基丙烯酸4-枯基苯酯、丙烯酸氰基乙酯、甲基丙烯酸氰基乙酯、丙烯酸4-联苯基酯、甲基丙烯酸4-联苯基酯、丙烯酸2-萘酯、甲基丙烯酸2-萘酯、丙烯酸四氢糠基酯、丙烯酸二乙基氨基乙酯、甲基丙烯酸二乙基氨基乙酯、丙烯酸二甲基氨基乙酯、甲基丙烯酸二甲基氨基乙酯、3-甲氧基丙烯酸甲酯、丙烯酸3-甲氧基丁酯、丙烯酸苯氧基乙酯、甲基丙烯酸苯氧基乙酯、甲基丙烯酸2-苯氧基乙酯、甲基丙烯酸丁基二乙二醇酯、丙烯酸乙二醇酯、乙二醇单甲醚丙烯酸酯(丙烯酸乙二醇单甲酯)、甲氧基聚乙二醇甲基丙烯酸酯350、甲氧基聚乙二醇甲基丙烯酸酯500、丙二醇单甲基丙烯酸酯、甲基丙烯酸丁氧基二甘醇酯、甲基丙烯酸乙氧基三甘醇酯、丙烯酸八氟戊酯、甲基丙烯酸八氟戊酯、甲基丙烯酸2,2,2-三氟乙酯、丙烯酸1,1,1,3,3,3-六氟异丙酯、甲基丙烯酸1,1,1,3,3,3-六氟异丙酯、甲基丙烯酸2,2,3,3,3-五氟丙酯、甲基丙烯酸2,2,3,4,4,4-六氟丁酯、丙烯酸2,2,3,3,4,4,4-七氟丁酯、甲基丙烯酸2,2,3,3,4,4,4-七氟丁酯、甲基丙烯酸2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-十五氟辛酯、二甲基氨基丙基丙烯酰胺、二甲基氨基丙基甲基丙烯酰胺、N-(1-甲基十一烷基)丙烯酰胺、N-(正丁氧基甲基)丙烯酰胺、N-(丁氧基甲基)甲基丙烯酰胺、N-(乙氧基甲基)丙烯酰胺、N-(正十八烷基)丙烯酰胺,N,N-二烷基取代的酰胺、更特别地N,N-二甲基丙烯酰胺、N,N-二甲基甲基丙烯酰胺,N-苄基丙烯酰胺、N-异丙基丙烯酰胺、N-叔-丁基丙烯酰胺、N-叔-辛基丙烯酰胺、N-羟甲基丙烯酰胺、N-羟甲基甲基丙烯酰胺;另外地,丙烯腈、甲基丙烯腈;乙烯基醚例如乙烯基甲基醚、乙基乙烯基醚、乙烯基异丁基醚;乙烯基酯例如乙酸乙烯酯;氯乙烯、卤化乙烯、偏二卤乙烯、乙烯基吡啶、4-乙烯基吡啶、N-乙烯基邻苯二甲酰亚胺、N-乙烯基内酰胺、N-乙烯基吡咯烷酮、苯乙烯、α-和对-甲基苯乙烯、α-丁基苯乙烯、4-正丁基苯乙烯、4-正癸基苯乙烯、3,4-二甲氧基苯乙烯、2-聚苯乙烯-甲基丙烯酸乙酯(分子量Mw为4000至13 000g/mol)和聚(甲基丙烯酸甲酯)-甲基丙烯酸乙酯(Mw为2000至8000g/mol)。
还可有利地选择单体c)使得它们包含支持辐射-化学交联(例如通过电子束或UV)的官能团。合适的可共聚的光引发剂为例如苯偶姻丙烯酸酯和丙烯酸酯官能化的二苯甲酮衍生物。支持通过电子轰击的交联的单体为例如丙烯酸四氢糠基酯、N-叔丁基丙烯酰胺和丙烯酸烯丙酯。
特别优选地,若胶带(A)的发泡的压敏胶粘剂包括多种聚(甲基)丙烯酸酯,则胶带(A)的发泡的压敏胶粘剂中的所有聚(甲基)丙烯酸酯可源于以上所述的单体组成。更特别地,胶带(A)的发泡的压敏胶粘剂中的所有聚(甲基)丙烯酸酯可源于由丙烯酸、丙烯酸正丁酯和丙烯酸甲酯构成的单体组成。
特别地,胶带(A)的发泡的压敏胶粘剂中的聚(甲基)丙烯酸酯和/或所有的聚(甲基)丙烯酸酯可源于下列单体组成:
丙烯酸 3-15重量%
丙烯酸甲酯 10-35重量%
丙烯酸2-乙基己酯 50-87重量%,
单体的比例相加达100重量%。
在溶剂中通过单体的自由基聚合可制备聚(甲基)丙烯酸酯,更特别地在具有50-150℃、优选地60-120℃的沸点范围的溶剂中,使用聚合引发剂的常规量,所述量一般为0.01-5重量%、更特别地0.1-2重量%(基于单体的总重量)。
原则上,本领域技术人员所熟悉的所有常用引发剂均是合适的。自由基源的实例为过氧化物、氢过氧化物和偶氮化合物,例如过氧化二苯甲酰、氢过氧化枯烯、过氧化环己酮、二-叔-丁基过氧化物、环己基磺酰乙酰基过氧化物、过氧化二碳酸二异丙酯、过辛酸叔-丁酯和苯频哪醇。一个非常优选的过程使用2,2'-偶氮双(2-甲基丁腈)或2,2'-偶氮双(2-甲基丙腈)(2,2'-偶氮双异丁腈;AIBN)作为自由基引发剂。
所考虑的用于制备聚(甲基)丙烯酸酯的溶剂包括醇例如甲醇、乙醇、正丙醇和异丙醇、正丁醇和异丁醇、优选地异丙醇和/或异丁醇,以及烃(例如甲苯),和更特别地具有60-120℃的沸点范围的汽油。另外地,可使用酮例如优选地丙酮、甲基乙基酮和甲基异丁基酮,和酯例如乙酸乙酯,以及所述类型的溶剂的混合物,其中优选的是混合物,其包含异丙醇,更特别地以2-15重量%、优选地3-10重量%的量,基于所使用的溶剂混合物。
根据本发明,优选地在聚(甲基)丙烯酸酯的制备(聚合)之后进行浓缩程序,并且在基本无溶剂的情况下进行聚(甲基)丙烯酸酯的进一步加工。可在不存在交联剂和促进剂物质的情况下对聚合物进行浓缩。然而,可在浓缩之前就将这类化合物之一添加到聚合物中,从而在这种或这些物质存在的情况下进行浓缩。
在浓缩步骤之后,聚合物可被转化为配混物。浓缩和配混还可任选地在相同的反应器中进行。
胶带(A)的发泡的压敏胶粘剂中的聚(甲基)丙烯酸酯的重均分子量Mw优选地位于20 000-2 000 000g/mol的范围、非常优选地100 000-1 500 000g/mol的范围、最优选地150 000-1 000 000g/mol的范围。在本说明书中,平均分子量Mw和多分散性PD的数值涉及通过凝胶渗透色谱法的测定。为了设置所需的平均分子量,可有利地在合适的链转移剂(例如硫醇、卤素化合物和/或醇)存在下进行聚合。
聚(甲基)丙烯酸酯优选地具有30-90、更优选地40-70的K值,如在甲苯(1%浓度的溶液,21℃)中测量的。根据Fikentscher的K值是对聚合物的分子量和粘度的度量。
根据本发明,同样适合的是具有窄的分子量分布(多分散性PD<4)的聚(甲基)丙烯酸酯。尽管分子量相对低,但是这些材料在交联后具有特别良好的剪切强度。此外,较低的多分散性使得从熔体加工更加容易,因为在基本相同的应用性能下,流动粘度比较宽分布的聚(甲基)丙烯酸酯的流动粘度更低。有利地,窄分布的聚(甲基)丙烯酸酯可通过阴离子聚合或通过受控的自由基聚合方法来制备,后者是特别合适的。还可经由N-氧基制备相应的聚(甲基)丙烯酸酯。除了这些方法,有利地可将原子转移自由基聚合(ATRP)应用于窄分布的聚丙烯酸酯的合成,在这种情况下,使用的引发剂优选地包括单官能或双官能的二级或三级卤化物,其中使用Cu、Ni、Fe、Pd、Pt、Ru、Os、Rh、Co、Ir、Ag或Au络合物来提取卤化物。
胶带(A)的发泡的压敏胶粘剂中的聚(甲基)丙烯酸酯优选地是交联的。虽然厚的组合物的层难以通过常规的电子束或UV辐射处理均匀地进行交联,但是由于随着渗透深度的增加而快速降低的辐射强度,热交联为这种情况提供了足够的补救。因此,优选地,胶带(A)的发泡的压敏胶粘剂是热交联的。作为厚的组合物的层更特别地为厚度大于150μm的那些。
在胶带(A)的发泡的压敏胶粘剂层中的聚(甲基)丙烯酸酯优选地用异氰酸酯、更特别地与三聚异氰酸酯和/或不含封端剂和空间位阻的异氰酸酯、和/或与环氧化合物交联,在各自的情况下在聚合物大分子中存在能够分别与异氰酸酯基团和/或环氧基团反应的官能团的情况下。
为了减弱异氰酸酯的反应性,可有利地使用以热可消除的官能团封端的异氰酸酯。优选地,使用脂族伯醇和仲醇、酚衍生物、脂族伯胺和仲胺、内酰胺、内酯和丙二酸酯进行封端。
在使用环氧-胺体系作为交联剂体系的情况下,胺可转化成它们的盐以确保适用期的增加。在这种情况下,易挥发的有机酸(例如甲酸、乙酸)或易挥发的无机酸(例如盐酸、碳酸的衍生物)对于形成盐是优选的。
当在胶带(A)的发泡的压敏胶粘剂的制备中使用热交联剂时,根本问题起因于微球的膨胀所需的温度的增加。以上提及的反应相对缓慢的交联剂的选择特别优选地与用于调节交联反应的动力学的促进剂体系一起是特别有利的,因为以这些交联剂可应用发泡所需的温度,而不会使胶粘剂体系受到破坏。
已经发现对于胶带(A)的发泡的压敏胶粘剂特别优选的是交联剂-促进剂体系,其包括含有环氧基团的至少一种交联剂物质和具有在低于聚(甲基)丙烯酸酯的熔融温度的温度下对交联反应起促进作用的至少一种促进剂物质。所述体系以在聚合物中存在能够与环氧基团进行交联反应的官能团为前提。含有环氧基团的合适的物质包括多官能的环氧化物,特别是二官能或三官能的环氧化物(即分别具有两个或三个环氧基团的那些),或更高官能度的环氧化物,或具有不同官能度的环氧化物的混合物。使用的促进剂优选地为胺(形式上被解释为氨的取代产物),实例为伯胺和/或仲胺,特别是叔胺和/或多官能的胺。还可使用具有两个或更多个胺基基团的物质,这些胺基基团为伯和/或仲和/或叔胺基基团,更特别地为二胺、三胺和/或四胺。更特别地选择那些与聚合物结构单元不发生反应或仅发生轻微反应的胺。可使用的促进剂的其它实例为基于磷的促进剂,例如膦和/或鏻化合物。
用于交联的聚(甲基)丙烯酸酯中的特别合适的官能团包括酸基团(例如羧酸、磺酸和/或膦酸基团)和/或羟基基团和/或酸酐基团和/或环氧基团和/或胺基基团。如果聚合物包括共聚的丙烯酸和/或甲基丙烯酸,则是特别有利的。
然而,还可能有利的是不包括促进剂,因为它们可能具有例如趋向于黄化的倾向(特别地含氮的物质)。在不加入促进剂的情况下工作的合适的交联剂的实例包括环氧环己基衍生物,特别地当羧酸基团存在于用于交联的聚(甲基)丙烯酸酯中时。这可例如通过将至少5重量%的丙烯酸共聚到聚合物中来实现。在用于交联的聚合物中,特别有利地是不存在质子受体、不存在电子对供体(路易斯碱)和/或不存在电子对受体(路易斯酸)。这些物质的缺乏在这里特别地涉及外部添加的促进剂,即,未共聚的促进剂和/或并入(引入)聚合物骨架中的促进剂;然而,特别优选地,既不存在外部添加的促进剂也不存在共聚的促进剂,并且特别地根本不存在促进剂。已成为特别有利的交联剂的是环氧环己基羧酸酯,例如(3,4-环氧环己烷)甲基-3,4-环氧环己基羧酸酯。
除了聚(甲基)丙烯酸酯之外,胶带(A)的发泡的压敏胶粘剂还可包括一种或多种另外的聚合物。这些包括例如丙烯酸酯不溶性聚合物例如聚烯烃(例如LDPE、HDPE、聚丙烯)、聚烯烃共聚物(例如乙烯-丙烯共聚物)、聚酯、共聚酯、聚酰胺、共聚酰胺、氟化的聚合物、聚环氧烷、聚乙烯醇、离聚物(例如用碱中和的乙烯-甲基丙烯酸共聚物)、醋酸纤维素、聚丙烯腈、聚氯乙烯、热塑性聚氨酯、聚碳酸酯、ABS共聚物和聚二甲基硅氧烷。其它合适的聚合物为聚丁二烯、聚异戊二烯、聚氯丁二烯、以及苯乙烯和二烯的共聚物。另外合适的是其本身是压敏胶粘剂或可通过加入粘结强度增强剂(bond strength enhancers)使其呈现为压敏胶粘剂的聚合物,这种聚合物的实例为聚-α-烯烃例如聚辛烯、聚己烯和无规的聚丙烯;特定的嵌段共聚物(二嵌段、三嵌段、星形嵌段共聚物及其组合)、天然和合成橡胶、硅酮和乙烯-乙酸乙烯酯。
在一个具体的实施方案中,胶带(A)的发泡的压敏胶粘剂包括15至50重量%的至少一种合成橡胶。优选地以20至40重量%包括合成橡胶,在各自的情况下基于压敏胶粘剂的总重量。
优选地,在该实施方案中,胶带(A)的发泡的压敏胶粘剂中的至少一种合成橡胶为具有A-B、A-B-A、(A-B)n、(A-B)nX或(A-B-A)nX结构的嵌段共聚物,
其中
-嵌段A彼此独立地为由至少一种乙烯基芳族化合物的聚合形成的聚合物;
-嵌段B彼此独立地为由具有4至18个碳原子的共轭二烯和/或异丁烯的聚合形成的聚合物,或为这种聚合物的部分或完全氢化的衍生物;
-X为偶联剂或引发剂的残基;和
-n为≥2的整数。
特别地在该实施方案中,胶带(A)的发泡的压敏胶粘剂中的所有合成橡胶为具有上述结构的嵌段共聚物。因此,胶带(A)的发泡的压敏胶粘剂还可包括具有上述结构的不同嵌段共聚物的混合物。
因此,合适的嵌段共聚物(乙烯基芳族嵌段共聚物)优选地包括一个或多个橡胶状嵌段B(软嵌段)和一个或多个玻璃状嵌段A(硬嵌段)。更优选地,胶带(A)的发泡的压敏胶粘剂中的至少一种合成橡胶是具有A-B、A-B-A、(AB)3X或(AB)4X结构的嵌段共聚物,其中A、B和X如上所定义。非常优选地,胶带(A)的发泡的压敏胶粘剂中的所有合成橡胶均为具有A-B、A-B-A、(A-B)3X或(AB)4X结构的嵌段共聚物,其中A,B和X如上所定义。更特别地,胶带(A)的发泡的压敏胶粘剂中的合成橡胶是具有A-B、A-B-A、(AB)3X或(AB)4X结构的嵌段共聚物的混合物,其优选地至少包括二嵌段共聚物AB和/或三嵌段共聚物A-B-A。
嵌段A通常是具有高于室温的优选的玻璃化转变温度(Tg,DSC)的玻璃状嵌段。更优选地,玻璃状嵌段的Tg为至少40℃、更特别地至少60℃、非常优选地至少80℃、且最优选地至少100℃。乙烯基芳族嵌段A在整个嵌段共聚物中的比例优选地为10至40重量%、更优选地为20至33重量%。用于嵌段A的结构的乙烯基芳族化合物优选地包括苯乙烯、α-甲基苯乙烯和/或其它苯乙烯衍生物。因此,嵌段A可为均聚物或共聚物。更优选地,嵌段A为聚苯乙烯。
乙烯基芳族嵌段共聚物另外地通常具有橡胶状嵌段B或软嵌段,其具有小于室温的优选的Tg。软嵌段的Tg更优选地小于0℃、更特别地小于-10℃(例如小于-40℃)、和非常优选地小于-60℃。
作为软嵌段B的单体的优选的共轭二烯特别地选自由以下组成的组:丁二烯、异戊二烯、乙基丁二烯、苯基丁二烯、戊间二烯、戊二烯、己二烯、乙基己二烯、二甲基丁二烯和法呢烯异构体、以及任何所需的这些单体的混合物。嵌段B同样可为均聚物或共聚物。
作为软嵌段B的单体的共轭二烯更优选地选自丁二烯和异戊二烯。例如,软嵌段B为聚异戊二烯、聚丁二烯或这两种聚合物之一的部分或完全氢化的衍生物,例如特别是聚丁烯丁二烯;或丁二烯和异戊二烯的混合物的聚合物。非常优选地,嵌段B为聚丁二烯。
必须存在于胶带(A)中的PSA层可,但不需要,与优选存在的胶带(A)的发泡的PSA层相同。“胶带(A)的PSA层”和措词“包括压敏粘合剂层的胶带(A)”意指该PSA层的压敏胶粘性质可为向外、即朝向基底起效的(活化的)。因此,该PSA层不会使胶带(A)的两个其它层彼此接合,而应被视为胶带(A)的外层。
在一个实施方案中,胶带(A)包括发泡的压敏胶粘剂层,并且发泡的压敏胶粘剂层是胶带(A)的压敏胶粘剂层。这是有利的,因为发泡的PSA能够补偿基底表面上的不平整,并且因此即使对这样的表面也产生均匀的粘结。
在另一个实施方案中,胶带(A)包括发泡的压敏胶粘剂层,并且胶带(A)的发泡的压敏胶粘剂层是在其一侧上具有热可活化的胶粘剂层并且在其另一侧上具有压敏胶粘剂层的载体材料。这是有利的,因为发泡的载体材料的正面性质可与PSA的性质结合,并且以这种方式可获得非常高性能的胶粘剂层。
“热可活化的胶粘剂层”(在下文中还同义地称作“热可活化的胶粘剂”)是指如下的胶粘剂的层,其在室温下是非粘性的,其仅在加热时能充分地建立对基底的粘附以产生与该基底的粘结。“加热”通常是指暴露于在约60至约200℃的范围内,更特别地根据本发明在120℃至200℃的范围内的温度。
胶带(A)的热可活化的胶粘剂层优选地为聚烯烃层。聚烯烃可源自一种或多种烯烃单体。热可活化的胶粘剂层的材料优选地选自聚乙烯、聚丙烯、乙烯-丙烯共聚物和这些聚合物的混合物。更优选地,热可活化的胶粘剂层的材料为聚丙烯。
胶带(A)优选地用于例如在汽车制造中将塑料部件粘结至玻璃或涂漆的基底。胶带(A)可用于例如粘结所谓的密封条。特别优选地,胶带(A)用于将塑料型材粘结至车辆的玻璃板或车身部件,特别地用于粘结门区域中的密封物和/或用于将橡胶唇(唇形橡胶)和其它聚合物唇粘结至玻璃板。
本发明的复合材料体系进一步包括位于胶带(A)的压敏胶粘剂层上的剥离衬垫。就本发明而言,该剥离衬垫的构造不是关键的。原则上,适合的是任何如下的剥离衬垫:其能够对胶带(A)的PSA起到常规的保护功能,并且其不会显著地不利影响复合材料体系的PSA和其它组分,并且可在应用之前以常规的方式从PSA移除。
用于剥离衬垫的合适的剥离涂层包括本领域技术人员已知的所有体系,实例为硅酮、氟化硅酮、硅酮共聚物、蜡、氨基甲酸酯、聚烯烃、或两种或更多种所述物质的混合物。
本发明的复合材料体系进一步包括胶带(B),其包括载体层、在所述载体层的一侧上的剥离层和在与所述剥离层相反的载体层的那侧上的压敏胶粘剂层。
胶带(B)优选地比胶带(A)更宽,并且比位于其压敏胶粘剂层上的剥离衬垫更宽,且同样优选地在胶带(A)和剥离衬垫的两侧上突出。这意味着,至胶带(A)的幅面的左侧和右侧,胶带(B)完全地覆盖胶带(A)以及位于胶带(A)的PSA上的剥离衬垫,并且还在其侧边缘上伸出。因此,在上述意义上,胶带(B)起到“内衬”的作用。突出不必在胶带(A)和剥离衬垫的两侧上是同样大小的(具有相同的程度);即,该复合材料由于胶带(B)的“不对称覆盖”也是可能的。
用于胶带(B)的载体层的合适的材料原则上包括适合作为用于PSA和剥离涂层的载体的任何材料,并且此外,具有足够的柔性,使得其能够毫无问题地被卷绕到卷筒上(卷绕成卷筒)。胶带(B)的载体层优选地为聚烯烃膜,更特别地聚丙烯膜,例如由单轴取向的聚丙烯(MOPP)组成的膜。
在胶带(B)的载体层的一侧上施加剥离层。用于该剥离层的合适的体系包括所有的本领域技术人员已知的那些,实例为硅酮、氟化硅酮、硅氧烷共聚物、蜡、氨基甲酸酯、聚烯烃、或两种或更多种所述体系的混合物。
另外,胶带(B)包括在载体层的与剥离层相反的那侧上的压敏胶粘剂层。原则上,压敏胶粘剂的层的设计和材料基础是任意的,条件是相对于胶带(A)或相对于它的热可活化的胶粘剂层,胶带(B)通过其压敏胶粘剂层具有根据EN 1939:2003的不大于5N/cm、优选地不大于1N/cm、更优选地0.02N/cm至1N/cm、非常优选地0.1N/cm至1N/cm的剥离粘附力。此为一种低的剥离粘附力,其对应于作为内衬的胶带(B)的功能,并因此使得能够仅以最小的施加力将胶带(B)从胶带(A)的热可活化的胶粘剂层移除。然而,该剥离粘附力足以提供如下复合材料体系:其可被稳定地引导通过切割体系,以及经由各种转向辊从该体系被引导至卷筒卷绕点,并且其分别防止内衬从胶带(A)打滑或在胶带(A)上滑动。
胶带(B)的压敏胶粘剂层包括天然橡胶或聚(甲基)丙烯酸酯作为主要成分。若天然橡胶为主要成分,则胶带(B)的压敏胶粘剂层优选地包括至少一种增粘树脂。
胶带(B)的层结构优选地包括在载体层和PSA层之间的粘附促进剂层。相应的胶带(B)可以两个步骤生产。在第一步骤中,载体层在其一侧上以剥离清漆涂覆,并且在其另一侧上以粘附促进剂的层涂覆。在第二步骤中,将PSA层施加至所述粘附促进剂层。
本发明的另一主题是用于制造本发明的复合材料体系的方法,其包括以下步骤:
a)切割卷绕成卷的复合材料,使得从母卷获得具有比母卷的幅面宽度更小的幅面宽度的多个卷,所述复合材料由以下组成
-胶带(A),其包括
-压敏胶粘剂层和
-热可活化的胶粘剂层;和
-位于胶带(A)的压敏胶粘剂层上的剥离衬垫;
b)使所述卷解卷并且用胶带(B)覆盖多个所得的幅面,使得胶带(B)的压敏胶粘剂层与胶带(A)的热可活化的胶粘剂层直接接触,所述胶带(B)包括
-载体层,
-在所述载体层的一侧上的剥离层,和
-在所述载体层的与所述剥离层相反的那侧上的压敏胶粘剂层;
c)切割胶带(B),使得形成由胶带(B)、胶带(A)和剥离衬垫组成的单独的(分开的)复合材料体系,该复合材料体系可被卷绕回卷;
其中胶带(B)具有根据EN 1939:2003测定的不大于5N/cm的对胶带(A)的热可活化的胶粘剂层的剥离粘附力。
本发明还具有作为其主题的胶带(B)的在如下中用途:将幅面形式的、于两侧上非粘性装配的材料卷绕成卷期间和/或在所述卷的储存期间覆盖该材料,所述胶带(B)包括
-载体层,
-在所述载体层的一侧上的剥离层,和
-在所述载体层的与所述剥离层相反的那侧上的压敏胶粘剂层,
其中胶带(B)的压敏胶粘剂层与幅面形式的材料的非粘性装配侧中的一个直接接触。特别地,幅面形式的、双侧非粘性装配的材料的一侧为热可活化的胶粘剂层,并且胶带(B)的压敏胶粘剂层处于与所述热可活化的胶粘剂层的直接接触中。
具体实施方式
实施例
为了制备本发明意义上的胶带(A),使40μm厚的吹塑聚丙烯膜在一侧上经受CO2电晕处理并且将其以如此处理过的那侧层压至可商购的双面丙烯酸酯发泡胶带(ACXplus 6808)。使相应的母卷解卷,并从幅材上切割出多个宽度为8mm的幅面,并且将其彼此并排放置。作为本发明意义上的胶带(B)(内衬),将基于在其背面上设有氨基甲酸酯剥离层的软的MOPP膜和基于天然橡胶胶粘剂的可商购的捆扎胶带(Strapping 51128)施加至每个幅面的吹塑聚丙烯膜(捆扎胶带的胶粘剂侧对着吹塑聚丙烯膜),使得捆扎胶带最初全面地覆盖所有的幅面。使得到的组件通过另外的切割单元。在其通过切割单元之后,存在ACXplus 6808和吹塑聚丙烯膜的8mm宽的复合材料的单独的幅面,其加衬有捆扎胶带的19mm宽的幅面,使得捆扎胶带在每一侧上突出5.5mm。
根据EN 1939:2003,发现捆扎胶带与由ACXplus 6808和吹塑聚丙烯膜制成的复合材料之间的剥离粘附力为0.9N/cm。
对比例
为了制备本发明意义上的胶带(A),使40μm厚的吹塑聚丙烯膜在一侧上经受CO2电晕处理并且将其以如此处理过的那侧层压至可商购的双面丙烯酸酯发泡胶带(ACXplus 6808)。使相应的母卷解卷,并从幅材上切割出多个宽度为8mm的幅面,并且将其彼此并排放置。作为内衬,将在一侧上涂覆有UV交联的、以无溶剂的方式施加的硅酮剥离层的55μm厚的LDPE膜施加至每个幅面的吹塑聚丙烯膜上,使得内衬最初全面地覆盖所有幅面。使得到的组件通过另外的切割单元。在其通过所述切割单元之后,存在ACXplus6808和吹塑聚丙烯膜的8mm宽的复合材料的单独的幅面,其加衬有内衬的19mm宽的幅面,使得内衬在每一侧上突出5.5mm。
从由本发明实施例的胶带和内衬形成的复合材料中,可毫无问题地以尺寸稳定的形式切割单独的幅面,并且使其通过所述体系。在对比例中,出现不规则性,这意味着突出的内衬的规定宽度应被更多地视为指标变量,并且更少地被视为实际上始终如一实现的值。
由本发明实施例和对比例得到的各个幅面被交叉卷绕以得到幅面长度为1400m的卷筒,其在每个端具有2cm的卷筒芯突出。将所述卷筒装入纸箱中,将5个这样的纸箱堆叠在一起,并且使用膜将6个这样的堆彼此连接在一起。这些组件在车辆的装载区域上运输10km的相同距离。然后,评价所述卷筒的状态。已经发现,本发明的卷筒是完全完整的并且特别地仍然呈现卷筒芯在两端的突出,以及稳定的卷绕。
相比之下,对比例的卷绕的幅面向下滑动,这意味者卷筒芯突出此时仍仅存在于上端。卷绕的层片(plies)已变成部分地插入彼此中,从而导致层片彼此粘连(阻滞);所述卷筒不再能令人满意地解卷和使用。
Claims (12)
1.复合材料体系,包括
-胶带(A),其包括
-压敏胶粘剂层和
-热可活化的胶粘剂层;
-位于胶带(A)的压敏胶粘剂层上的剥离衬垫;和
-胶带(B),其包括
-载体层,
-在所述载体层的一侧上的剥离层,和
-在所述载体层的与所述剥离层相反的那侧上的压敏胶粘剂层;
其中胶带(B)的压敏胶粘剂层与胶带(A)的热可活化的胶粘剂层直接接触,并且胶带(B)具有根据EN 1939:2003测定的不大于5N/cm的对胶带(A)的热可活化的胶粘剂层的剥离粘附力。
2.根据权利要求1所述的复合材料体系,其特征在于,
胶带(A)的压敏胶粘剂层包括聚(甲基)丙烯酸酯作为主要成分。
3.根据前述权利要求中至少一项所述的复合材料体系,其特征在于,
胶带(A)包括发泡的压敏胶粘剂层。
4.根据权利要求3所述的复合材料体系,其特征在于,胶带(A)的发泡的压敏胶粘剂层包括至少部分膨胀的空心微球体。
5.根据权利要求3和4中至少一项所述的复合材料体系,其特征在于,
发泡的压敏胶粘剂层为胶带(A)的压敏胶粘剂层。
6.根据权利要求3所述的复合材料体系,其特征在于,
胶带(A)的发泡的压敏胶粘剂层为载体层,其中所述热可活化的胶粘剂层布置在其一侧上并且所述压敏胶粘剂层布置在其另一侧上。
7.根据前述权利要求中至少一项所述的复合材料体系,其特征在于,
胶带(A)的热可活化的胶粘剂层为聚烯烃层。
8.根据前述权利要求中至少一项所述的复合材料体系,其特征在于,
胶带(B)比胶带(A)更宽并且比位于其压敏胶粘剂层上的剥离衬垫更宽,并且在两侧突出胶带(A)和剥离衬垫。
9.根据前述权利要求中至少一项所述的复合材料体系,其特征在于,
胶带(B)的载体层为聚烯烃膜。
10.根据前述权利要求中至少一项所述的复合材料体系,其特征在于,
胶带(B)的压敏胶粘剂层包括天然橡胶或聚(甲基)丙烯酸酯作为主要成分。
11.用于制造根据前述权利要求中至少一项所述的复合材料体系的方法,其包括以下步骤:
a)切割卷绕成卷的复合材料,使得从母卷获得具有比母卷的幅面宽度更小的幅面宽度的多个卷,所述复合材料由以下组成
-胶带(A),其包括
-压敏胶粘剂层和
-热可活化的胶粘剂层;和
-位于胶带(A)的压敏胶粘剂层上的剥离衬垫;
b)使所述卷解卷并且用胶带(B)覆盖多个所得的幅面,使得胶带(B)的压敏胶粘剂层与胶带(A)的热可活化的胶粘剂层直接接触,所述胶带(B)包括
-载体层,
-在所述载体层的一侧上的剥离层,和
-在所述载体层的与所述剥离层相反的那侧上的压敏胶粘剂层;
c)切割胶带(B),使得形成由胶带(B)、胶带(A)和剥离衬垫组成的单独的复合材料体系,该复合材料体系可被卷绕回卷;
其中胶带(B)具有根据EN 1939:2003测定的不大于5N/cm的对胶带(A)的热可活化的胶粘剂层的剥离粘附力。
12.胶带(B)用于在将幅面形式的、于两侧上非粘性装配的材料卷绕成卷期间和/或在所述卷的储存期间覆盖该材料的用途,所述胶带(B)包括
-载体层,
-在所述载体层的一侧上的剥离层,和
-在所述载体层的与所述剥离层相反的那侧上的压敏胶粘剂层,
其中胶带(B)的压敏胶粘剂层与幅面形式的材料的非粘性装配侧中的一个直接接触。
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DE102016223550.8A DE102016223550A1 (de) | 2016-03-10 | 2016-11-28 | Verbundsystem mit schwach klebendem Abdeckmaterial |
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CN112969766A (zh) * | 2018-11-23 | 2021-06-15 | 3M创新有限公司 | 共挤出的橡胶基多层粘合剂组件 |
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DE102017221270B4 (de) * | 2017-11-28 | 2021-08-12 | Tesa Se | Verfahren zur Herstellung eines Siegelklebebandes und Verwendung |
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KR101961247B1 (ko) | 2019-03-22 |
JP6412188B2 (ja) | 2018-10-24 |
KR20170106224A (ko) | 2017-09-20 |
CN107177320B (zh) | 2020-12-08 |
DE102016223550A1 (de) | 2017-09-14 |
JP2017160432A (ja) | 2017-09-14 |
US20170260424A1 (en) | 2017-09-14 |
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