CN114834122B - 热贴附pet膜 - Google Patents

热贴附pet膜 Download PDF

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CN114834122B
CN114834122B CN202111609515.8A CN202111609515A CN114834122B CN 114834122 B CN114834122 B CN 114834122B CN 202111609515 A CN202111609515 A CN 202111609515A CN 114834122 B CN114834122 B CN 114834122B
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pet
parts
pet film
layer
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CN114834122A (zh
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赵益来
姜龙济
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Abstract

本发明公开了一种热贴附PET(Polyethylene terephthalate)膜，所述PET膜为包括中间层和分别结合于中间层的两面的表面层及热贴附层的共挤出(Coextrusion)PET膜，所述热贴附层相对于100重量份的同时使用1,4‑环己烷二甲醇(1,4‑Cyclohexane Dimethanol)、1,3‑丙二醇(1,3‑propanediol)及1,4‑丁二醇(1,4‑Butanediol)改性的PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)树脂，包括10至50重量份的使用间苯二甲酸(Isophthalic acid)改性的PET树脂。

Description

热贴附PET膜
技术领域
本发明涉及PET膜，更详细地说，涉及一种能够通过加热而容易地贴附于金属表面的热贴附PET膜。
背景技术
例如，冰箱、洗衣机等家电产品的外壳或各种工业设备的外壳等使用在诸如镀锌钢板或镀锡钢板等各种钢板或其他金属板的表面贴附有PET膜的膜贴附金属板。这样的贴附有PET膜的金属板的优点在于，由于贴附于金属板的PET膜，不仅具有优异的美感，而且抗划伤性优异，并且能够轻松地在其表面印刷各种图案和文字。
以往，在金属板的表面涂覆粘合剂，并利用涂覆的粘合剂将PET膜贴附到金属板表面。然而，这种现有技术中存在的问题，是贴附PET膜的过程成本高、生产性降低，PET膜贴附过程不良率高，由于制备过程中所使用的粘合剂中包括的挥发性有机溶剂而产生对人体有害的有机化合物(VOCs)。
(现有技术文献)
(专利文献)
韩国公开发明专利第10-2012-0077904号(2012.07.10)
发明内容
要解决的技术问题
本发明是鉴于上述问题而提出的，其目的在于提供一种不使用粘合剂也能够通过加热而容易地贴附于金属表面的热贴附PET膜。
本发明的目的不限于上述内容，本领域的普通技术人员将通过下面的记载可以清楚地理解未提及的其他目的。
解决问题的方案
为实现上述目的，本发明提供一种通过加热能够与金属贴附的PET(Polyethyleneterephthalate，聚对苯二甲酸乙二醇酯)膜，所述PET膜为包括中间层和分别结合于所述中间层的两面的表面层及热贴附层的共挤出(Coextrusion)PET膜，所述热贴附层，相对于100重量份的同时使用1,4-环己烷二甲醇(1,4-Cyclohexane Dimethanol)、1,3-丙二醇(1,3-propanediol)及1,4-丁二醇(1,4-Butanediol)改性的PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)树脂，包括10至50重量份的使用间苯二甲酸(Isophthalic acid)改性的PET树脂。
所述表面层，相对于100重量份的使用1,4-环己烷二甲醇(1,4-CyclohexaneDimethanol)改性的PET树脂，包括1至5重量份的混合有1至20重量％无机颗粒的PET树脂及2至10重量份的使用间苯二甲酸(Isophthalic acid)改性的PET树脂，其中所述无机颗粒选自由二氧化硅(SiO2)、二氧化钛(TiO2)、碳酸钙(CaCO3)及它们的混合物所构成的组。
此外，所述中间层，相对于100重量份的使用1,3-丙二醇(1,3-propanediol)改性的PET树脂，包括50至100重量份的使用1,4-丁二醇(1,4-Butanediol)改性的PET树脂及5至15重量份的使用萘二甲酸(Naphthalic acid)改性的PET树脂。
发明的效果
根据如上所述的本发明，可以获得仅通过加热就能够容易地贴附到金属表面的PET膜。
此外，根据本发明的热贴附PET膜，其优点在于，由于在将PET膜贴附到金属表面的过程中不需要使用粘合剂，因此环保。
此外，与在将PET膜贴附于金属板的过程中使用粘合剂的现有以往相比，其优点在于，可以降低不良率，提高生产性，因此经济效益优异。
本发明的效果不限于上述内容，本领域的普通技术人员将通过下面的记载可以清楚地理解未提及的其他效果。
附图说明
图1是用于说明根据本发明一实施例的PET膜的结构的截面图。
图2为将根据本发明实施例制备的PET膜热贴附于铝板的结果物的拍照显示。
图3为将根据本发明实施例制备的PET膜热贴附于镀锡钢板的结果物的拍照显示。
图4为将根据本发明实施例制备的PET膜热贴附于镀铬钢板的结果物的拍照显示。
(附图标记说明)
100：PET膜
110：表面层
120：中间层
130：热贴附层
具体实施方式
以下，将参考附图详细说明本发明的实施例，以便本发明所属领域的普通技术人员能够容易地实施。本发明可以以各种不同的形式实现，且不限于这里说明的实施例。
在整个说明书中，当某个部分“包括”某个构成要素时，除非另有特别的相反记载，否则这可能意味着还包括其他构成要素，而不是排除其他构成要素。
本发明的发明人在研究用于家电产品的外壳等的贴附有PET(Polyethyleneterephthalate，聚对苯二甲酸乙二醇酯)膜的金属板的过程中，着眼于需要一种无需使用粘合剂即可通过加热贴附于金属的PET膜。当通过混合各种物质改性的PET(Polyethyleneterephthalate，聚对苯二甲酸乙二醇酯)树脂并将它们共挤出(Coextrusion)以三层结构制备PET膜时，通过确认所制备的PET膜满足基本物性且通过加热容易附着于金属表面而完成了本发明。
根据本发明的PET膜主要可以非常适宜作为通过加热贴附于金属板的用途而使用，然而，本发明不限于此，根据本发明的PET膜可以作为通过加热贴附到除金属板之外的其他各种形状的金属的用途而使用。
以下，将详细说明本发明。
如图1所示，根据本发明一实施例的PET膜100由中间层120和分别结合于所述中间层120的两面的表面层110及热贴附层130构成，并以共挤出(Coextrusion)方式制备。
所述表面层110具有阻挡及印刷功能，所述热贴附层130具有与金属热贴附的功能，所述中间层120具有与所述表面层110和热贴附层130结合的功能及与表面层110一起执行阻挡的功能。
所述表面层110，相对于100重量份的使用1,4-环己烷二甲醇(1,4-CyclohexaneDimethanol)改性的PET树脂，包括1至5重量份的混合1至20重量％无机颗粒的PET树脂及2至10重量份的使用间苯二甲酸(Isophthalic acid)改性的PET树脂，其中所述无机颗粒选自由二氧化硅(SiO2)、二氧化钛(TiO2)、碳酸钙(CaCO3)及它们的混合物所构成的组。
如上所述的表面层110的成分及其成分比例是在完成本发明的过程中经过无数次反复实验得到的最佳值，当如上所述地指定表面层110的成分及其成分比例时，在具有阻挡及印刷功能的同时，可以与后述的中间层120牢固地结合。
所述中间层120，相对于100重量份的使用1,3-丙二醇(1,3-propanediol)改性的PET树脂，包括50至100重量份的使用1,4-丁二醇(1,4-Butanediol)改性的PET树脂及5至15重量份的使用萘二甲酸(Naphthalic acid)改性的PET树脂。
如上所述的中间层120的成分及其成分比例是在完成本发明的过程中经过无数次反复实验得到的最佳值，当如上所述地指定中间层120的成分及其成分比例时，中间层120可以在与表面层110一起执行阻挡功能的同时将表面层110及热贴附层130牢固地结合。
所述热贴附层130，相对于100重量份的同时使用1,4-环己烷二甲醇(1,4-Cyclohexane Dimethanol)、1,3-丙二醇(1,3-propanediol)及1,4-丁二醇(1,4-Butanediol)改性的PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)树脂，包括10至50重量份的使用间苯二甲酸(Isophthalic acid)改性的PET树脂。
如上所述的热贴附层130的成分及其成分比例是在完成本发明的过程中经过无数次反复实验得到的最佳值，当如上所述地指定热贴附层130的成分及其成分比例时，热贴附层130可以在与中间层120牢固地结合的同时通过加热可以牢固地结合到金属表面。
此外，构成根据本发明的PET膜的表面层、中心层、热贴附层的各树脂可以追加包括通常的PET膜制备中所使用的各种添加剂，这对于本领域技术人员来说是显而易见的，所以省略详细说明。
以下，将通过实施例和试验例更详细地说明本发明。
实施例：热贴附PET膜的制备
制备由表面层、中间层和热贴附层三层结构构成的拉伸共挤出PET膜。
作为表面层的树脂，以100：3：5的比例使用了利用1,4-环己烷二甲醇(1,4-Cyclohexane Dimethanol)改性的PET树脂、混合10重量％二氧化硅(SiO2)的PET树脂及利用间苯二甲酸(Isophthalic acid)改性的PET树脂。
作为中间层的树脂，以100：75：10的比例使用了利用1,3-丙二醇(1,3-propanediol)改性的PET树脂、利用1,4-丁二醇(1,4-Butanediol)改性的PET树脂及利用萘二甲酸(Naphthalic acid)改性的PET树脂。
作为热贴附层的树脂，以100：30的比例使用了同时利用1,4-环己烷二甲醇(1,4-Cyclohexane Dimethanol)、1,3-丙二醇(1,3-propanediol)及1,4-丁二醇(1,4-Butanediol)改性的PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)树脂及利用间苯二甲酸(Isophthalic acid)改性的PET树脂。
表面层树脂、中间层树脂、热贴附层树脂分别通过双螺杆(Twin screw)挤出机熔融，表面层的挤出机温度控制在220-240-270-270-270-270℃，中间层的挤出机温度控制在200-230-260-260-260-260℃，热贴附层的挤出机温度控制在200-230-255-255-255-255℃。将通过了各挤出机的熔融树脂在265℃下以T型模头共挤出，然后利用冷却辊迅速冷却至室温。然后，将共挤出的树脂预热至80℃，接着沿机器方向拉伸3倍、沿宽度方向拉伸4倍以制备被双轴拉伸的PET膜。
膜各层的厚度设计为表面层8μm、中间层20μm、热贴附层8μm，从而制备出具有36μm总厚度的双轴拉伸PET膜。
比较例
选定市场中销售的具有36μm厚度的PET膜作为比较例。
物性试验
将根据上述实施例制备的PET膜及上述比较例中的PET膜作为对象，进行物性试验，并将其结果示于下表。
从上表的结果可知，根据本发明实施例制备的PET膜表现出与市场中销售的比较例的PET膜相似的基本物性。
热贴附试验
测试根据上述实施例制备的PET膜是否可以热贴附到金属板。热贴附试验在温度230℃、辊压3MPa、速度25m/min的条件下执行。
图2为将根据本发明实施例制备的PET膜热贴附于铝板的结果物的拍照显示，图3为将根据本发明实施例制备的PET膜热贴附于镀锡钢板的结果物的拍照显示，图4为将根据本发明实施例制备的PET膜热贴附于镀铬钢板的结果物的拍照显示。
如图所示，可以确认根据本发明实施例制备的PET膜通过加热能够牢固地贴附于各种金属板。
即，可以确认根据本发明制备的PET膜仅通过加热而不使用现有技术中的粘合剂也可以容易且牢固地结合于各种金属。
至此，虽然为了说明本发明的原理结合优选实施例示出和说明了本发明，但是本发明不限于如此示出和说明的结构及作用，对于本发明所属领域的技术人员来说很好理解的是，在不脱离所附权利要求的思想和范围的情况下，可以对本发明进行许多变更及修正。

Claims (2)

1.一种热贴附PET膜，通过加热能够贴附于金属，其特征在于，
所述PET膜为包括中间层和分别结合于所述中间层的两面的表面层及热贴附层的共挤出PET膜，
所述热贴附层相对于100重量份的同时使用1,4-环己烷二甲醇、1,3-丙二醇及1,4-丁二醇改性的PET树脂，包括10至50重量份的使用间苯二甲酸改性的PET树脂，
所述表面层相对于100重量份的使用1,4-环己烷二甲醇改性的PET树脂，包括1至5重量份的混合有1至20重量％无机颗粒的PET树脂及2至10重量份的使用间苯二甲酸改性的PET树脂，其中所述无机颗粒选自由二氧化硅、二氧化钛、碳酸钙及它们的混合物所构成的组。
2.根据权利要求1所述的热贴附PET膜，其特征在于，
所述中间层相对于100重量份的使用1,3-丙二醇改性的PET树脂，包括50至100重量份的使用1,4-丁二醇改性的PET树脂及5至15重量份的使用萘二甲酸改性的PET树脂。
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