CN116731479A - 树脂组成物及其制作方法 - Google Patents
树脂组成物及其制作方法 Download PDFInfo
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- CN116731479A CN116731479A CN202210411486.2A CN202210411486A CN116731479A CN 116731479 A CN116731479 A CN 116731479A CN 202210411486 A CN202210411486 A CN 202210411486A CN 116731479 A CN116731479 A CN 116731479A
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- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 1
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- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明提供一种适用于异型押出加工的树脂组成物。以树脂组成物的总重量为基准,树脂组成物包括40重量%至92.1重量%的聚酯;2重量%至15重量%的改质剂、0.2重量%至1.5重量%的增黏剂以及0.1重量%至40重量%的填充剂。
Description
技术领域
本发明涉及一种树脂组成物及其制作方法,尤其涉及一种适用于异型押出加工的树脂组成物及其制作方法。
背景技术
异型押出(profile extrusion),是一种采取模外成型的塑料加工制程,其与射出成型(injection molding)是采取模内成型的塑料加工工法不同。相较于射出成型的方式,异型押出较可以依据客制化的产品需求进行调整。
在异型押出所使用的材料方面,一般是使用聚氯乙烯(Polyvinyl Chloride;PVC)或丙烯腈-丁二烯-苯乙烯共聚物(Acrylonitrile Butadiene Styrene;ABS)树脂,其原因在于异型押出制程中,对应的材料需有较高的熔融张力及/或较高的熔融流动性。
聚酯材料已广泛地用于一般生活产品、工业品或商品中,诸如:保特品、磁带、绝缘带、相片薄膜、描图薄膜、包装膜、电绝缘膜材、工程用纸等。因此,如何将聚酯材料用于异型押出制程或对应的产品中,甚至,将导入回收聚酯材料,实已成目前的研究课题
发明内容
本发明是针对一种树脂组成物及其制作方法,其可适用于异型押出加工。
根据本发明的实施例,树脂组成物适用于异型押出加工。以树脂组成物的总重量为基准,树脂组成物包括40重量%至92.1重量%的聚酯;2重量%至15重量%的改质剂、0.2重量%至1.5重量%的增黏剂以及0.1重量%至40重量%的填充剂。
根据本发明的实施例,树脂组成物的制作方法包括以下步骤:将至少包括40重量%~92.1重量%的聚酯、2重量%~15重量%的改质剂、0.2重量%~1.5重量%的增黏剂以及0.1重量%至40重量%的填充剂的原料混合;以及将混合后的原料放入双螺杆押出机以进行挤出及造粒,以形成适用于异型押出加工的树脂组成物。
基于上述,借由上述的组成及/或对应的制作方法,本发明的树脂组成物可适用于异型押出加工。
附图说明
图1是依照本发明的一实施例的一种树脂组成物的制作方式的部分示意流程图。
附图标记说明
S10、S20、S30、S40:步骤。
具体实施方式
在以下详细描述中,为了说明而非限制,阐述揭示特定细节的示例性实施例以提供对本发明的各种原理的透彻理解。然而,本领域一般技术者将显而易见的是,得益于本揭示案,可在脱离本文所揭示特定细节的其他实施例中实践本发明。此外,可省略对熟知装置、方法及材料的描述以免模糊对本发明的各种原理的描述。
范围在本文中可表达为自“约”一个特定值至“约”另一特定值,其亦可以直接表示为一个特定值及/或至另一特定值。在表达所述范围时,另一实施例包括自该一个特定值及/或至另一特定值。类似地,当借由使用先行词“约”将值表达为近似值时,将理解,该特定值形成另一实施例。将进一步理解,每一范围之端点显然与另一端点相关或与另一端点无关。
在本文中,非限定的术语(如:可能、可以、例如或其他类似用语)为非必要或可选择性的实施、包含、添加或存在。
除非另外定义,在此使用的所有术语(包括技术术语和科学术语)具有与本发明所属技术领域中具有通常知识者通常理解相同的含义。还将理解的是,术语(诸如在通常使用的字典中定义的那些)应解释为具有与在相关技术背景中的含义一致的含义,并不应以理想化或过于正式的意义解释,除非在此明确这样定义。
在本实施例中,树脂组成物可适用于异型押出加工。以树脂组成物的总重量为基准,树脂组成物包括:40重量%至92.1重量%的聚酯、2重量%至15重量%的改质剂、0.2重量%至1.5重量%的增黏剂以及0.1重量%至40重量%的填充剂。
在一实施例中,以树脂组成物的总重量为基准,树脂组成物可以更包括0.1重量%至1.0重量%的抗氧化剂。
在一实施例中,以树脂组成物的总重量为基准,树脂组成物可以更包括0.1重量%至1.0重量%的滑剂、0.15重量%至5.0重量%的耐候剂以及0.1重量%至40重量%的填充剂。
[聚酯]
需说明的是,本文中的术语“聚酯”(或,被称为“聚酯料”或“聚酯材料”等类似用语)是指任意类型的聚酯,特别是指芳香族聚酯。
另外,本文中的聚酯也可以例如是聚对苯二甲酸丙二酯、聚对苯二甲酸丁二酯、聚萘二甲酸乙二酯或上述的组合。在本实施例中,所述的聚酯优选为聚对苯二甲酸乙二酯、聚对苯二甲酸丙二酯或上述的组合。此外,也可以使用共聚物,其特别指的是可通过使用两种以上的二羧酸及/或两种以上的二醇成分得到的共聚物。
较好地,本文中的聚酯包括源自对苯二甲酸(purified terephthalic acid;PTA)及乙二醇(ethylene glycol;EG)的聚酯(即,聚对苯二甲酸乙二酯(polyethyleneterephthalate;PET))。
在一实施例中,用于本揭露的树脂组成物的聚酯可以是粒状的形式,其可被称为聚酯粒(polyester chips)。
在一实施例中,用于本揭露的树脂组成物的聚酯可以包括原生聚酯、回收聚酯或上述的组成。
[回收聚酯料]
聚酯材料的回收方法例如包含:收集各类型的废弃聚酯材料;可以依据前述废弃聚酯材料的种类、颜色及/或曾被使用的用途,进行对应的分类;然后,可以将分类好的废弃聚酯材料进行压缩打包;之后,可以将打包的废弃聚酯材料运送至废弃物处理厂。前述的废弃聚酯材料例如可以包括回收的宝特瓶(recycled PET bottle),但本发明不受限于此。
聚酯材料的回收方法可以进一步地包含:去除废弃聚酯材料上的物件(如:瓶盖、标签及/或黏合剂)。接着,物理机械粉碎前述的废弃聚酯材料;然后,利用适当的的方式(如:浮选)将粉碎后的聚酯材料予以分离出;之后,将粉碎且被分离出的废弃聚酯材料进行干燥,即可获得处理过的回收聚酯材料。
在一实施例中,回收聚酯材料也可以例如包含:通过直接购买处理过的回收聚酯材料。
在一实施例中,回收聚酯材料也可以是加工过程中(如:加工过程中被切除后的耳料或其他类似的多余料件)的废料回收。这样的回收材料常被称为工业回收料。
借由上述方式所获得的回收聚酯材料可以进一步地借由后续的方式形成适当的回收聚酯粒。
[物理性回收聚酯料的形成]
在一实施例中,可以将回收聚酯材料熔融,以使其呈现熔融状态的熔融物。然后,可以借由滤网对熔融物进行过滤,以将其中可能的固体杂质排除。之后,可以借由押出机(如:市售的单螺杆押出机(single screw extruder;SSE)、双螺杆押出机(twin screwextruder;TSE)或其他类似的螺杆押出机,但不限)对过滤后的熔融物进行挤出造粒,以形成物理性回收聚酯料。
在一实施例中,在熔融回收聚酯材料之前,可以借由切、剪、裁或其他物理方式使其成为粉状或粒状,以减少熔融时所需的时间及/或能耗。
另一方面而言,前述的方式是将回收聚酯材料经由切割、熔融、过滤及挤出的步骤,而重新塑型。也就是说,物理性回收聚酯料基本上是使回收聚酯材料中的聚酯分子重新排列所制得。
在本实施例中,由于在前述的物理再制过程中,其中的聚酯分子基本上只有重新排列(即,基本上并未重组)。因此,原本存在于回收聚酯材料中的成分(如:添加剂、滑剂、安定剂及/或聚合反应触媒)仍然会存在于物理性回收聚酯料中。也就是说,物理性回收聚酯料的部分特性可能会相同或相似于原使用的回收聚酯材料的部分特性。
借由前述的物理再制作业所产生的物理性回收聚酯料通常具有较高(相较于后续所述的化学性回收聚酯料)的特性黏度。在本实施例中,物理性回收聚酯料的特性黏度通常不小于0.60dL/g;例如,可以介于0.65dL/g至0.95dL/g之间;例如,可以更介于0.75dL/g至0.85dL/g之间;例如是:可以为约0.80dL/g。在一实施例中,若要调整物理性回收聚酯料的特性黏度,可以采用固态聚合的方式。然而,固态聚合的方式较容易被用来提升物物理性回收聚酯料的特性黏度,而无法被用来降低物理性回收聚酯料的特性黏度。
[化学性回收聚酯料的形成]
步骤1-1:在一实施例中,可以将回收聚酯材料化学解聚(chemicaldepolymerisation)。举例而言,可以将回收聚酯材料与解聚液投入解聚槽(depolymerisation tank)中进行化学解聚。
化学解聚液基本上能使回收聚酯材料中的聚酯分子断链,从而达到解聚的效果。并且,可能可以获得分子链较短的聚酯组成及/或由一个二酸单元(如:对苯二甲酸)及多个二醇单元(1,4-丁二醇、聚四亚甲基醚二醇或上述的组合;或是,乙二醇、聚四亚甲基醚二醇或上述的组合)所组合而成的酯类单体。也就是说,经由化学解聚后的混合物的平均分子量基本上小于回收聚酯材料的平均分子量。
另外,本发明并未限定解聚液的种类。举例而言,可以借由水进行水解(hydrolysis)。又举例而言,可以借由醇类(如:甲醇、乙醇、乙二醇、二甘醇、1,4-丁二醇或上述的混合)进行醇解(alcoholysis)。
在一实施例中,解聚液以醇类较好。通常以可用于生产原生粒(virgin chips)的反应单体的醇类为更好。举例而言,可以使用乙二醇作为解聚液。
在进行化学解聚反应时,可以适当地进行加热步骤。一般而言,加热可以加速化学反应的进行。举例而言,可以将回收聚酯材料与醇类投入解聚槽之后,于200℃至230℃的温度下进行大约三小时的醇解反应。
步骤1-2:酯化反应。
将前述化学解聚反应后的产物进行酯化反应。值得注意的是,本发明并未限定所有的聚酯材料需完全地被解聚。
举例而言,可以将前述化学解聚反应后的产物移入酯化槽(esterificationtank)进行酯化反应。酯化反应一般是可逆反应。因此,在进行酯化反应的同时,可以借由蒸馏的方式带出解聚液及/或部分的生成物(如:醇类及/或水)。如此一来,可以借由化学反应的平衡,以提升其余的生成物(如:聚酯生成物)的量或浓度。
在一实施例中,在将前述化学解聚反应后的产物移入酯化槽之前,可以先借由滤网进行过滤,以使至少部分杂质可以被排除,从而降低非聚酯类杂质的浓度。在一实施例中,滤网的孔径可以介于1微米至10微米之间。
在一可能的实施例中,在进行前述的酯化反应一段时间之后,可以在酯化槽中加入适当或适量的添加物,但本发明不限于此。其他添加物可以包括抗氧化剂、安定剂及/或聚合反应触媒。
步骤1-3:聚合反应。
将前述酯化反应后的产物进行聚合反应。
举例而言,可以将前述酯化反应后的产物移入聚合槽(polymerization tank)进行聚合反应。
前述的聚合反应可以包括预聚合反应及/或主聚合反应。
预聚合反应例如是于一段时间内使槽体内的气压下降。举例而言沿,可以借由抽气帮浦,以于60分钟内使槽体内的气压由常压(如:约760torr)降至10torr;或是,更进一步降至10torr以下(如:1torr或接近1torr)。
主聚合反应例如是在低压下(如:低于室压)对槽体内的物质进行加热升温。举例而沿,可以在槽体内的气压在于1torr以下的条件下,于280℃的温度进行聚合反应。
步骤1-4:形成化学性回收聚酯料。
进行前述的聚合反应直到槽体内的物质具有对应的特性黏度。然后,可以使槽体内的气压提升(如:充氮气)。之后,例如可以借由一般聚合物粒常用的造粒方式,将槽体内的物质挤出及/或切粒,以形成化学性回收聚酯料。
在本实施例中,借由前述的化学再制作业所形成的化学性回收聚酯料通常具有较低(相较于之前所述的物理性回收聚酯料)的特性黏度。在本实施例中,通常不小于0.65dL/g;较好地,可以介于0.65dL/g至0.95dL/g之间;更好地,可以介于0.75dL/g至0.85dL/g之间;例如是:可以为约0.80dL/g。
[回收聚酯料的形成]
可以将前述的物理性回收聚酯料及前述的化学性回收聚酯料相混和,以形成具有预定特性黏度的回收聚酯料。相较于物理性回收聚酯料,化学性回收聚酯料的制程成本较多且/或制造时间较长。相较于化学性回收聚酯料,物理性回收聚酯料的材料特征(如:特性黏度,但不限)较难调整。因此,借由将前述的物理性回收聚酯料及前述的化学性回收聚酯料相混和,可以使回收聚酯料的制程成本降低且/或缩短制造时间,且仍可以对材料的特征进行适当地调整。
在一实施例中,可以直接将粉状或粒状的物理性回收聚酯料及化学性回收聚酯料,依据适当的比例予以相混和,而形成回收聚酯料。
在一实施例中,物理性回收聚酯料及化学性回收聚酯料可以借由押出机进行熔融及挤出的造粒步骤,而形成回收聚酯料。
在一实施例中,回收聚酯料的特性可能会介于物理性回收聚酯料与化学性回收聚酯料之间。举例而言,回收聚酯料的特性黏度可以依据物理性回收聚酯料与化学性回收聚酯料的比例及特性黏度,而有对应的线性关系。
在一实施例中,树脂组成物所使用的聚酯(或;聚酯料)可以包括回收聚酯(或;回收聚酯料)。在一实施例中,树脂组成物所使用的回收聚酯(或;回收聚酯料)可以包括物理性回收聚酯(或;物理性回收聚酯料)与化学性回收聚酯(或;化学性回收聚酯料)。
[原生聚酯粒的制造方法]
可以借由相同或相似于上述[化学回收聚酯粒的制造方法]进行制造,差别在于:可以直接将对苯二甲酸及乙二醇加入酯化槽中进行酯化反应。
在本实施例中,借由上述的方式所形成的原生聚酯粒的特性黏度通常不小于0.65dL/g;例如,可以介于0.65dL/g至0.95dL/g之间;例如,可以更介于0.75dL/g至0.85dL/g之间;例如是,可以达到0.80dL/g。
在一实施例中,借由上述的方式所形成的聚酯粒可以被称为原生聚酯粒(virginpolyester chips)。
在一可能的实施例中,在进行前述的酯化反应一段时间之后,可以在酯化槽中加入适当或适量的添加物,但本发明不限于此。
[改质剂]
为提升树脂组成物的各项物理性能,可以添加与聚酯兼容性较好的改质剂。另外,借由添加改质剂,也可能借以调整含聚酯的树脂组成物的高温加工熔融黏度及改善流动性,以在进行押出加工时,非固态(可能包括熔融态或半熔融态)的树脂组成物黏覆到加工设备上的可能。另外,借由添加改质剂,也可能提升适用于异型押出加工的树脂组成物的物理韧性及/或改善其撕裂强度。
在一实施例中,改质剂可以包括烯类单体、烯类共聚物或聚烯烃(Polyolefin)。
在一实施例中,改质剂可以包括以甲基丙烯酸缩水甘油酯接枝的乙烯-丙烯-二烯单体(ethylene-propylene-diene monomer(EPDM)grafted with glycidyl methacrylate(GMA);EPDM-g-GMA或EPDM-GMA)、以甲基丙烯酸缩水甘油酯接枝的聚(乙烯辛烯)(Poly(ethylene octene)grafted with glycidyl methacrylate;POE-g-GMA或POE-GMA)、乙烯-丙烯-二烯单体(ethylene-propylene-diene monomer;EPDM)、苯乙烯-丁二烯-苯乙烯共聚物(Styrene-butadiene-styrene copolymer;SBS)、苯乙烯-乙烯-丁烯-苯乙烯共聚物(styrene-ethylene-butylene-styrene copolymer;SEBS)、聚烯烃弹性体(Polyolefinelastomer;POE)、以马来酸酐接枝的聚烯烃弹性体(Polyolefin elastomer grafted withmaleic anhydride;POE-g-MA或POE-MA)或上述的组合,但本发明不限于此。
[增黏剂]
为提升树脂组成物的特性黏度,可以增黏剂。但值得注意的是,若增黏剂的添加量过多(如:以树脂组成物的总重量为基准,增黏剂的比例大于或等于1.5重量%;或是,更大于1.0重量%),则在进行押出加工时,非固态(可能包括熔融态或半熔融态)的树脂组成物可能会容易地黏覆到加工设备上。
在一实施例中,增黏剂可以包括环氧树脂(epoxy;EP)、异氰酸酯、酸酐、恶唑啉或上述的组合,但本发明不限于此。
在一实施例中,作为增黏剂的环氧树脂可以使用巴斯夫公司(BASF Corporation)出产,型号为ADR 4380的树脂产品。
在一实施例中,作为增黏剂的异氰酸酯可以包括甲苯二异氰酸酯(Toluenediisocyanate;TDI)、亚甲基二苯基二异氰酸酯(Methylene diphenyl diisocyanate;MDI)、六亚甲基二异氰酸酯(Hexamethylene diisocyanate;HDI)、异佛尔酮二异氰酸酯(Isophorone diisocyanate;IPDI)、二环己基甲烷二异氰酸酯(4,4’-diisocyanatodicyclohexylmethane;HMDI)或上述的组合,但本发明不限于此。
在一实施例中,作为增黏剂的酸酐可以包括萘四酸二酐(1,4,5,8-Naphthalenetetracarboxylic dianhydride;NTDA)、偏苯二酚二酐(Pyromelliticdianhydride;PMDA)或上述的组合,但本发明不限于此。
在一实施例中,作为增黏剂的恶唑啉可以包括2,2'-双(2-恶唑啉)(2,2’-bis(2-oxazoline);BOZ)、二恶唑啉(1,3-Bis(4,5-dihydro-2-oxazolyl)benzene;PBO)或上述的组合,但本发明不限于此。
[抗氧化剂]
在聚合物的形成过程或使用过程中,可能会因为热、高能辐射(如:紫外光照射)、机械压力、催化剂残留、与其他杂质反应、使用过程中与氧化剂的接触或其他的可能,而产生聚合物降解(Polymer degradation)或不预期反应。前述聚合物降解或不预期反应的原因可能是:聚合物或其所制作的产品中可能因为热、高能辐射、机械压力或其他原因产生了过氧化自由基(peroxy radical)、其他可能的自由基或过氧化物;而前述的自由基或过氧化物可能会与空气或水汽中的氧气反应,而产生更多的自由基/过氧化物,进而引发对应的恶性循环反应。造成前述恶性循环反应的结果可能会使聚合物或其所制作的产品容易受损(如:形成裂痕、破裂或变色),进而降低或损失其原有的物理性质。
因此,可以借由添加的抗氧化剂,以抑制前述恶性循环反应的进行。原因可能是:使其(即:抗氧化剂)与前述的自由基或过氧化物进行反应,以降低前述恶性循环反应进行的可能。
但值得注意的是,若抗氧化剂的添加量过多(如:以树脂组成物的总重量为基准,抗氧化剂的比例大于或等于2重量%;或是,更大于1.0重量%),则可能会造成树脂组成物在外观上的成色偏差过大。
在一实施例中,抗氧化剂可以包括酚类化合物、胺类化合物、亚磷类化合物、硫酯类化合物或上述的组合。
在一实施例中,抗氧化剂可以使用商品名/商标名为Irganox 1010、Irganox1425、Irganox 245、Anox 1315、Anox PP18、Anox 20、Lowinox 1790、Lowinox TBM-68、Naugard445、Sandostab P-EPQ、Irgafos 168及Naugard 412S的市售品。
[滑剂]
在树脂组成物的制造过程中及/或进行加工(如:押出)时,滑剂可以降低黏覆到加工设备上的可能及气斑的产生。
在一实施例中,滑剂可以包括选自碳数为20以上(即:C20以上)脂肪酸、脂肪酸酯、脂肪醇、石蜡油或上述的组合。较好地,滑剂可以包括碳数为C28至C32(即:C28至C32)的脂肪酸或脂肪酸酯。
[耐候剂]
在一实施例中,耐候剂可以包括具有羟基及/或苯基的苯并三唑类化合物(benzotriazole with hydroxyl and/or phenyl groups)、具有羟基的二苯甲酮类化合物(hydroxy benzophenone)、二氧化硅、二氧化钛、氢氧化铝、氧化铝、氢氧化镁、氧化镁、磷酸镁、硫酸镁、碳酸镁、硼酸锌、氧化锌、硫化锌、氧化硼、磷酸硼、硼酸钙、碳酸钙、氢氧化钙、硫酸钡或上述的组合。
于一较好实施例中,耐候剂是选自于由下列所构成的群组:二氧化钛、碳酸钙及硫酸钡。更好地,耐候剂是二氧化钛。如此一来,不仅可使聚合物或其所制作的产品具有良好的耐候性,还可使聚合物或其所制作的产品呈白色,而不需另外添加色料。
于一较好实施例中,耐候剂是选自于由下列所构成的群组:具有羟基及/或苯基的苯并三唑类化合物及具有羟基的二苯甲酮类化合物。具有羟基及/或苯基的苯并三唑类化合物可以包括但不限于:2-(2’-羟基-3’,5’-二特戊基苯基)苯并三唑(2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol;CAS:25973-55-1;商品名/商标名为UV-328的市售品)、2,4-二-叔丁基-6-(5-氯-2H-苯并三唑-2-基)苯酚(2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol;CAS:3864-99-1;商品名/商标名为UV-327的市售品)、2-(2’-羟基-3’-异丁基-5’-叔丁基苯基)苯并三唑(2-(2H-benzotriazol-2-yl)-4-(tert-butyl)-6-(sec-butyl)phenol;CAS:36437-37-3;商品名/商标名为UV-350的市售品)或2-(2’-羟基-3’,5’-二叔丁基苯基)-苯并三唑(2-benzotriazol-2-yl-4,6-di-tert-butylphenol;CAS:3846-71-7;商品名/商标名为UV-320的市售品)。具有羟基的二苯甲酮类化合物可以包括但不限于:2-羟基二苯甲酮(2-hydroxybenzophenone)或4-羟基二苯甲酮(4-hydroxybenzophenone)。具有羟基及/或苯基的苯并三唑类化合物或具有羟基的二苯甲酮类化合物可以作为紫外线吸收剂。如此一来,可使聚合物或其所制作的产品在紫外光的照射下(如:在自然阳光),可以具有良好的耐候性。
[填充剂]
在借由树脂组成物的所制成的加工件中,于树脂组成物中所添加的填充剂可能可以提升前述加工件的机械强度、耐磨耗性及/或不燃性。
在一实施例中,填充剂可选自玻璃纤维、滑石粉、碳酸钙、云母粉、石灰石、硅石粉、氢氧化镁或氢氧化铝等金属氢氧化物的其中一种或一种以上,且填充剂可以为平均粒径为0.01~100微米(micrometer;μm)的粒子。
[树脂组成物的制造方法]
树脂组成物的一种制造方法示例性地说明如下。
步骤一:称取以下重量份数的原料:40wt%~92.1wt%的聚酯、2wt%~15wt%的改质剂以及0.2wt%~1.5wt%的增黏剂。
在一实施例中,可以更称取以下重量份数的原料:0.1wt%~1.0wt%的抗氧化剂。
在一实施例中,可以更进一步地称取以下重量份数的原料:0.1wt%至1.0wt%的滑剂、0.15wt%至5.0wt%的耐候剂以及0.1wt%至40wt%的填充剂。
步骤二:将上述的原料按比例混合后,放入混料机中搅拌适当的时间(如:5分钟至30分钟),然后,放入双螺杆押出机中。并且,可以借由双螺杆押出机进行挤出及造粒,以形成对应的树脂组成物粒(resin composition chip)。
在一实施例中,树脂组成物(或,树脂组成物粒)的黏度可以介于300Pa.s~500Pa.s。若树脂组成物的黏度过高(如:大于500Pa.s),则可能必须再经由固态聚合或其他增黏方式以取得/或得,而可能需要耗用过多能源。
在一实施例中,双螺杆押出机可以具有一个或多个的加热区段。各加热区段的温度约介于200℃~270℃。加热区段的数量、对应温度、加热速度可以依据设计上的需求而加以调整。举例而言,双螺杆押出机可以具有五个加热区段:第一加热区段的温度约为200℃~230℃,第二加热区段的温度约为220℃~250℃,第三加热区段的温度约为230℃~265℃,第四加热区段的温度约为230℃~260℃,第五加热区段的温度约为230℃~265℃,螺杆转速约为180rpm~220rpm,螺杆长度(L)及螺杆直径(D)的L/D的比值介于36-52。
步骤三:将前述的树脂组成物粒放入单螺杆押出机中,以形成对应的异型原材。前述的异型原材可以借由适当的成型挤押、冷却及/或材切,以形成对应的异型材。异型材的形状、外观及/或尺寸可以依据需求而加以调整,于本发明并不加以限制。举例而言,异型材可以包括条状材、平板材、圆形管材、方形管材或其他适宜的异型押出材。
在一实施例中,经由材切所余下的多余料件可以被回收(即,被称为:工业回收料),而可以借由前述的方式回收再利用。
[实例及比较例]
于以下表示实例及比较例,对于本发明作具体地说明,而本发明根本不受到下述实例限定。
各实例及比较例可以为借由上述的方式形成对应的树脂组成物粒及/或异型材。差别在于:调整各组成成分的使用比例。
于以下表示实例及比较例中,评价的方式或标准可以如下。
冲击强度:依据ASTM D 256测试标准。试样尺寸(mm):(63.5±2)×(12.7±0.2)×(3.2±0.2);缺口角度45±1°,半径0.25±0.12mm,缺口深度10.16±0.05mm。
拉伸强度(或称:抗拉强度):依据ASTM D638测试标准进行检验。试样尺寸(mm):(165±2)×(19±0.2)×(3.2±0.2),拉伸速度为50mm/min。
弯曲模数:依据ASTM D 790测试标准进行检验。试样类型试样尺寸(mm):(127±2)×(12.7±0.2)×(3.2±0.2),弯曲速度为13mm/min。
热变形温度:依据ASTM D648标准进行检验。试样尺寸(mm):(127±2)×(12.7±0.2)×(3.2±0.2);升温速率为120℃/hr,压力为1.82MPa(4.6kg/cm2),设定形变量为0.254mm。
260℃的黏度:于增黏后,在260℃的环境氛围下量测复合树脂的黏度。
[表1]
如[表1]中各实例及比较例所示,填充剂的添加可以降低冲击强度(如:冲击强度约在4.0kg-cm/cm)。相反,若未添加填充剂,则冲击强度较高(如:冲击强度约在13kg-cm/cm以上)。
如[表1]中各实例及比较例所示,添加适当比例的增黏剂后,进一步地添加填充剂仍可维持拉伸强度。
如[表1]中各实例及比较例所示,添加适当比例的增黏剂后,进一步地添加耐候剂仍可维持拉伸强度。
如[表1]中各实例及比较例所示,经添加适当比例的增黏剂增黏后,其热变形温度略微提高。
如[表1]中各实例及比较例所示,于增黏后,在260℃的环境氛围下量测复合树脂的黏度,其约在可进行异型押出加工的范围(如:大于1000Pa.s;或是,更适于进行异型押出加工的范围:1685Pa.s±10%)。
综上所述,本发明的树脂组成物可适用于异型押出加工。另外,本发明的适用于异型押出加工的树脂组成物所使用的聚酯可以包括回收聚酯。因此,可以较为环保。
[实用性]
借由本发明前述实施例的树脂组成物的制造方法所形成的树脂组成物,可以直接地或间接地应用于异型押出加工制程或异型押出加工物,并可进一步地加工而成为其他民生性、工业性或适宜应用的产品,其包括但不限于:建材、文具、玩具、装潢、家具、医疗器材、灯饰、家电用品等。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (9)
1.一种适用于异型押出加工的树脂组成物,其特征在于,其中以所述树脂组成物的总重量为基准,所述树脂组成物包括:
40重量%至92.1重量%的聚酯;
2重量%至15重量%的改质剂;
0.2重量%至1.5重量%的增黏剂;以及
0.1重量%至40重量%的填充剂。
2.根据权利要求1所述的树脂组成物,其特征在于,其中所述聚酯包括聚对苯二甲酸乙二酯。
3.根据权利要求1所述的树脂组成物,其特征在于,其中所述聚酯包括回收聚酯。
4.根据权利要求3所述的树脂组成物,其特征在于,其中所述聚酯包括物理性回收聚酯及化学性回收聚酯。
5.根据权利要求1所述的树脂组成物,其特征在于,其中所述改质剂包括烯类单体、烯类共聚物、聚烯烃或或上述的组合。
6.根据权利要求1所述的树脂组成物,其特征在于,其中所述增黏剂包括环氧树脂、异氰酸酯、酸酐、恶唑啉或上述的组合。
7.根据权利要求1所述的树脂组成物,其特征在于,其中以所述树脂组成物的总重量为基准,所述树脂组成物更包括:
0.1重量%至1.0重量%的抗氧化剂。
8.根据权利要求7所述的树脂组成物,其特征在于,其中以所述树脂组成物的总重量为基准,所述树脂组成物更包括:
0.1重量%至1.0重量%的滑剂;
0.15重量%至5.0重量%的耐候剂;以及
0.1重量%至40重量%的填充剂。
9.一种适用于异型押出加工的树脂组成物的制作方法,其特征在于,包括:
将至少包括40重量%~92.1重量%的聚酯、2重量%~15重量%的改质剂、0.2重量%~1.5重量%的增黏剂以及0.1重量%至40重量%的填充剂的原料混合;以及
将混合后的所述原料放入双螺杆押出机以进行挤出及造粒,以形成适用于异型押出加工的所述树脂组成物。
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