CN104311945A - 一种聚乙烯防伪塑料袋及其制备方法 - Google Patents

一种聚乙烯防伪塑料袋及其制备方法 Download PDF

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CN104311945A
CN104311945A CN201410481970.8A CN201410481970A CN104311945A CN 104311945 A CN104311945 A CN 104311945A CN 201410481970 A CN201410481970 A CN 201410481970A CN 104311945 A CN104311945 A CN 104311945A
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false proof
polyethylene
counterfeiting
plastics bag
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王超军
欧阳春平
刘奇祥
蔡彤旻
殷朝纲
焦建
杨晖
曾祥斌
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Kingfa Science and Technology Co Ltd
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    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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Abstract

本发明公开了一种聚乙烯防伪塑料袋及其制备方法,聚乙烯防伪塑料袋,按重量份计,包括如下组分:100份聚乙烯;0.1~20份防伪母粒;所述防伪母粒按重量百分比计,包括:30~99.9%载体树脂;0.01~15%荧光粉;0.01~65%编码物质;0~3.25%助剂;载体树脂为聚乙烯;其制备方法:用大、小两台挤出机分别将聚乙烯和防伪母粒挤塑至共挤机头,聚乙烯从大挤出机中挤出,防伪母粒从小挤出机中挤出,挤出双色泡管后经吹胀、牵引、印刷、收卷、制袋、冲口,即得;通过采用特定共挤吹膜工艺,使得防伪条与聚乙烯塑料袋融结为一体,具有良好的结合力;生产工艺简单,更容易加工成型和批量化生产;根据防伪条上的荧光特征和编码信息实现对聚乙烯防伪塑料袋的真伪鉴别和溯源。

Description

一种聚乙烯防伪塑料袋及其制备方法
技术领域
本发明涉及包装防伪技术领域,特别涉及一种聚乙烯防伪塑料袋及其制备方法。
背景技术
聚乙烯塑料袋,是一种应用领域非常广泛的塑料袋,然而,其通常不具有防伪功能,用于某些需要防伪的领域时,需要在塑料袋上另外设置专门的防伪标识,比如印刷防伪油墨,或粘贴防伪标签等,即影响了产品的外观,又增加了加工工序。而且这些防伪技术都是广泛使用的防伪技术,造假者很容易看出,从而仿制相应的防伪标识。
中国专利CN102815444A公开了一种加线防伪软包装,它在软包装袋上,封装有产品和防伪线,防伪线的一端粘结在袋口封边上,另一端粘结在袋底封边上,防伪线中段悬空。该发明免去了贴标工序及其设备投资和人工,同一包装物所需防伪线的成本,比所需不干胶防伪标签的成本低得多,适用于高速自动化软包产品使用防伪技术。然而该技术的仿制门槛极低,防伪线可以轻易地取下进行分析、仿制;且该包装所使用的封装技术也是普通的市售设备即可做到。
发明内容
为了克服现有技术的缺点与不足,本发明的首要目的在于提供一种防伪效果好、能实现真伪鉴别与溯源,且防伪成本低的聚乙烯防伪塑料袋。
本发明的另一目的是提供上述聚乙烯防伪塑料袋的制备方法。
本发明是通过以下技术方案实现的:
一种聚乙烯防伪塑料袋,按重量份计,包括如下组分:
聚乙烯               100份;
防伪母粒             0.1~20份;
其中,所述防伪母粒,按重量百分比计,包括如下组分:
载体树脂             30~99.9%;
荧光粉               0.01~15%;
编码物质             0.01~65%;
助剂                 0~3.25%;
所述载体树脂为聚乙烯。
本发明所述的防伪母粒的制备方法,包括如下步骤:
将载体树脂、荧光粉、编码物质和助剂按配比称量,倒入高混机中混合均匀,在双螺杆挤出机中200~300℃熔融,挤出造粒,得到防伪母粒。
本发明的防伪母粒加入量优选为0.1~20重量份;防伪母粒与聚乙烯的比例决定了防伪条在聚乙烯塑料袋上的宽度,为了得到宽度为0.3~5cm的防伪条,需添加0.1~20份的防伪母粒;添加0.1~20份的防伪母粒可以节约成本,且能增强防伪效果,因为制备防伪母粒所用的荧光粉和编码物质组分,其原材料价格较聚乙烯贵,且添加量越少就越难以分析仿冒;而如果添加的防伪母粒超过20份,其原材料的成本高,且容易被分析仿冒。
其中,所述编码物质选自选自镁、钾、钙、钪、钛、钒、铬、锰、铁、钴、镍、 铜、锌、镓、锗、硒、锶、钇、锆、铌、钼、钯、银、铟、锡、锑、碲、钡、镧、铈、镨、钕、钐、钆、镝、钬、铒、铥、镱、镥、铋的化合物的一种或几种;所述编码物质具有易于被检测、区分和准确识别的特性,目的在于通过其组合形成一定数量的编码,捆绑相关的产品信息。
所述荧光粉选自紫外激发荧光粉和/或红外激发荧光粉;所述紫外激发荧光粉优选为激发波长为360nm的苝的甲酸二酰亚胺衍生物(1,7-二溴-3,4,9,10-苝四甲酸二酰亚胺),所述红外激发荧光粉优选为激发波长为980nm的无机稀土氟化物(YErYbF3);所述荧光粉具有荧光的特性,使得防伪母粒能吸收紫外光或红外光,发出特征荧光,目的在于提供一种易于识别的防伪特征。
所述助剂为偶联剂、润滑剂、抗氧剂或抗静电剂中的一种或几种的混合;所述偶联剂优选为乙烯基三乙氧基硅烷,所述润滑剂优选为硬脂酸,所述抗氧剂优选为2,6-二叔丁基-4-甲基苯酚,所述抗静电剂优选为聚醚酯酰胺。
更进一步地,所述聚乙烯防伪塑料袋,还可以包括0~5份的色粉,所述色粉选自碳黑、铁红、酞菁蓝的一种或几种;通过添加色粉可以满足不同颜色的聚乙烯防伪塑料袋的制备。
本发明所述的聚乙烯防伪塑料袋的制备方法,包括如下步骤:
用大、小两台挤出机分别将聚乙烯和防伪母粒挤塑至共挤机头,聚乙烯从大挤出机中挤出,防伪母粒从小挤出机中挤出,挤出双色泡管后经吹胀、牵引、印刷、收卷、制袋、冲口,得到带有防伪条的聚乙烯防伪塑料袋。
所述大、小两台挤出机的料筒温度均分为3段控制,依次为加料段110~130℃、中段140~160℃、前段150~180℃,共挤机头温度150~180℃,吹胀比1.5~3.0。
所述聚乙烯防伪塑料袋上的防伪条宽度为0.3~5.0cm,可以通过调节大、小两台挤出机的喂料量来控制吹胀后的防伪条的宽度。
本发明通过聚乙烯塑料袋与防伪条结合,采用特定的共挤吹膜工艺制备得到带有防伪条的聚乙烯防伪塑料袋,在吹膜的时候,即在聚乙烯塑料袋上生成防伪条及防伪编码,防伪条的载体树脂采用与塑料袋相同的聚乙烯材料,防伪条与聚乙烯塑料袋融结为一体,具有良好的结合力,从而保持了聚乙烯塑料袋的优异性能。在聚乙烯防伪塑料袋的生产、销售、使用环节中,将防伪条的编码信息与聚乙烯防伪塑料袋的批次信息,流通信息相互捆绑,建立防伪信息管理系统。通过在聚乙烯防伪塑料袋的使用终端截取小段防伪条,用快速精密分析检测仪检测其编码信息,通过防伪信息管理系统可以快速、准确的查询到聚乙烯防伪塑料袋的生产、流通信息,从而实现真伪鉴别与溯源。
本发明与现有技术相比,具有如下有益效果:
1)本发明通过采用特定的共挤吹膜工艺,使得制备得到的防伪条与聚乙烯塑料袋融结为一体,具有良好的结合力,以聚乙烯防伪塑料袋自身的特性进行防伪,防伪效果难以被仿制。
2)本发明制备得到的聚乙烯防伪塑料袋,与现有带防伪标识的防伪塑料袋相比,不需要额外生产和粘贴防伪标识,生产工艺简单,且防伪成本低,更容易加工成型和批量化生产。
3)本发明制备得到的聚乙烯防伪塑料袋,能够将编码信息与其生产、流通信息绑定,根据防伪条上的荧光特征和编码信息实现对聚乙烯防伪塑料袋的真伪鉴别和溯源。
 
附图说明
图1为本发明聚乙烯防伪塑料袋的挤出膜泡示意图; 
图2为本发明聚乙烯防伪塑料袋的A-A截面示意图;
图3 为本发明聚乙烯防伪塑料袋成品示意图;
图中:1为聚乙烯塑料袋,2为防伪条,3为共挤模头。
 
具体实施方式
下面通过具体实施方式来进一步说明本发明,以下实施例为本发明较佳的实施方式,但本发明的实施方式并不受下述实施例的限制。
以下实施例和对比例中:
所使用的聚乙烯:80%吉林石化HDPE 9455F和20%茂名石化LLDPE DFDA-7042。
所使用的荧光粉:紫外激发荧光粉选用苝的甲酸二酰亚胺衍生物(1,7-二溴-3,4,9,10-苝四甲酸二酰亚胺),激发波长360nm,发出绿色荧光;红外激发荧光粉选用无机稀土氟化物(YErYbF3),激发波长:980nm,发出绿色荧光。
所使用的助剂:偶联剂选用乙烯基三乙氧基硅烷,润滑剂选用硬脂酸,抗氧剂选用2,6-二叔丁基-4-甲基苯酚,抗静电剂选用聚醚酯酰胺。
实施例A1~A40及对比例B1~B4:防伪母粒的制备
将载体树脂、荧光粉、编码物质和助剂按表1~5所示配比称量,倒入高混机中混合均匀,在双螺杆挤出机中200~300℃熔融,挤出造粒,制备得到防伪母粒。                                                
实施例1~40及对比例1~6:聚乙烯防伪塑料袋的制备
一种聚乙烯防伪塑料袋的制备方法,其原料配方如表6~10所示,其制备方法包括以下步骤:
按重量份称取好各组分,用大、小两台挤出机分别将聚乙烯和表1~5制备得到的防伪母粒挤塑至共挤机头,聚乙烯从大挤出机中挤出,防伪母粒从小挤出机中挤出,挤出双色泡管后经吹胀、牵引、印刷、收卷、制袋、冲口,得到带有防伪条的聚乙烯防伪塑料袋;其中,所述大、小两台挤出机的料筒温度均分为3段控制,依次为加料段120℃、中段150℃、前段165℃,共挤机头温度为165℃,吹胀比为2.5。测定其防伪条的宽度、防伪条相对撕裂强度,防伪条荧光、防伪编码检测效果、防伪成本,具体数据列于表6~10中。
各性能指标的测试方法或标准如下:
防伪条相对撕裂强度测试按GB/T 16578.1-2008塑料薄膜和薄片耐撕裂性能的测定 第1部分: 裤形撕裂法进行,分别测试防伪条和聚乙烯塑料袋的撕裂强度,以二者的比值作为防伪条的相对撕裂强度。
防伪条荧光检测采用便携式紫外灯或红外灯,在遮光环境下照射防伪条表面,目测其荧光亮度。
防伪编码检测的检测方法:从防伪塑料袋上截取一小段防伪条,采用专用精密XRF荧光光谱分析仪检测编码物质的种类和含量,从而准确检测出防伪编码。
防伪成本,是指生产防伪聚乙烯塑料袋较生产普通聚乙烯塑料袋增加的成本,主要是指防伪条较同等量的聚乙烯所增加的原材料成本,防伪母粒的加工成本以及防伪条的挤出成本这三部分占聚乙烯防伪塑料袋的总成本的比例。

Claims (8)

1.一种聚乙烯防伪塑料袋,其特征在于,按重量份计,包括如下组分:
聚乙烯               100份;
防伪母粒             0.1~20份;
其中,所述防伪母粒,按重量百分比计,包括如下组分:
载体树脂             30~99.9%;
荧光粉               0.01~15%;
编码物质             0.01~65%;
助剂                 0~3.25%;
所述载体树脂为聚乙烯。
2.根据权利要求1所述的聚乙烯防伪塑料袋,其特征在于,所述编码物质选自选自镁、钾、钙、钪、钛、钒、铬、锰、铁、钴、镍、 铜、锌、镓、锗、硒、锶、钇、锆、铌、钼、钯、银、铟、锡、锑、碲、钡、镧、铈、镨、钕、钐、钆、镝、钬、铒、铥、镱、镥、铋的化合物的一种或几种。
3.根据权利要求1所述的聚乙烯防伪塑料袋,其特征在于,所述荧光粉选自紫外激发荧光粉和/或红外激发荧光粉;所述紫外激发荧光粉优选为激发波长为360nm的苝的甲酸二酰亚胺衍生物(1,7-二溴-3,4,9,10-苝四甲酸二酰亚胺),所述红外激发荧光粉优选为激发波长为980nm的无机稀土氟化物(YErYbF3)。
4.根据权利要求1所述的聚乙烯防伪塑料袋,其特征在于,所述助剂为偶联剂、润滑剂、抗氧剂或抗静电剂中的一种或几种的混合;所述偶联剂优选为乙烯基三乙氧基硅烷,所述润滑剂优选为硬脂酸,所述抗氧剂优选为2,6-二叔丁基-4-甲基苯酚,所述抗静电剂优选为聚醚酯酰胺。
5.根据权利要求1所述的聚乙烯防伪塑料袋,其特征在于:所述防伪母粒的制备方法,包括如下步骤:将载体树脂、荧光粉、编码物质和助剂按配比称量,倒入高混机中混合均匀,在双螺杆挤出机中200~300℃熔融,挤出造粒,得到防伪母粒。
6.如权利要求1~5任一项所述的聚乙烯防伪塑料袋的制备方法,包括如下步骤:
用大、小两台挤出机分别将聚乙烯和防伪母粒挤塑至共挤机头,聚乙烯从大挤出机中挤出,防伪母粒从小挤出机中挤出,挤出双色泡管后经吹胀、牵引、印刷、收卷、制袋、冲口,得到带有防伪条的聚乙烯防伪塑料袋。
7.根据权利要求6所述的聚乙烯防伪塑料袋的制备方法,所述大、小两台挤出机的料筒温度均分为3段控制,依次为加料段110~130℃、中段140~160℃、前段150~180℃,共挤机头温度150~180℃,吹胀比1.5~3.0。
8.根据权利要求6所述的聚乙烯防伪塑料袋的制备方法,所述聚乙烯防伪塑料袋上的防伪条宽度为0.3~5.0cm。
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