WO2019056413A1 - 一种大容量液体自动灌装机用高阻隔包装膜及其制造方法 - Google Patents

一种大容量液体自动灌装机用高阻隔包装膜及其制造方法 Download PDF

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WO2019056413A1
WO2019056413A1 PCT/CN2017/104937 CN2017104937W WO2019056413A1 WO 2019056413 A1 WO2019056413 A1 WO 2019056413A1 CN 2017104937 W CN2017104937 W CN 2017104937W WO 2019056413 A1 WO2019056413 A1 WO 2019056413A1
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layer
film
spe
glue
filling machine
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PCT/CN2017/104937
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English (en)
French (fr)
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陈伟
俞国星
孙永庆
丁磊
余文健
邱燕君
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江阴申隆包装材料有限公司
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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
    • B32B27/08—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 synthetic resin
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/10—Interconnection of layers at least one layer having inter-reactive properties

Definitions

  • the invention relates to a high barrier packaging film for a large-capacity liquid automatic filling machine and a manufacturing method thereof.
  • liquid packaging generally adopts multi-layer co-extruded barrier film or composite PE (polyethylene) such as PET (ie, polyethylene terephthalate) and BOPA (biaxially stretched nylon film).
  • PE polyethylene
  • PET polyethylene terephthalate
  • BOPA biaxially stretched nylon film
  • the former has poor cutting property and tensile strength. Poor strength and puncture resistance, the latter has poor drop resistance and is easy to curl.
  • the structure of the current co-extruded barrier film is generally: PE/Tie/PA/Tie/PE (ie, polyethylene layer/adhesive layer/nylon layer/adhesive layer/polyethylene layer), and the film produced by the method is resistant to falling.
  • the structure of the composite film is: PET/INK/BOPA /PE (where INK is the ink layer), produced by dry or extrusion process, the film is severely curled and has poor tear resistance;
  • Patent application No. CN 102602096 A a composite high barrier film for liquid pharmaceutical packaging, which is formed by co-extruding a seven-layer film, which is a PP layer and an TL layer from the outside to the inside. , PA layer, EVOH layer, PA layer, TL layer and Pemet layer.
  • the barrier property can be, but it is still a co-extruded packaging film, and the puncture strength and the cutting property are not good.
  • CN 103203919 A a high-barrier semi-high temperature cooking liquid packaging material and a packaging bag made thereof, which is a polyester film (PET layer, aluminum foil (Al) layer, nylon) by a dry laminating machine
  • PET layer polyester film
  • Al aluminum foil
  • nylon nylon
  • the (PA) layer and the polyethylene film (PE) layer are laminated to form a composite film from top to bottom, and the tear resistance is not good, and the curl is severe.
  • the technical problem mainly solved by the present invention is to provide a large-capacity liquid automatic filling
  • the machine uses high barrier packaging film, which has excellent cutting property, high tensile strength, good puncture resistance, good drop resistance and is not easy to curl.
  • a high barrier packaging film for a large-capacity liquid automatic filling machine comprising a multi-layer co-extruded film, a first SPE layer, a first PA layer and an ink layer arranged in sequence a first glue layer, a second PA layer or a second EVOH layer, a second SPE layer, a first PE layer or a PP layer; a multi-layer co-extruded film co-extruded and blown film, and the ink layer is printed on the first PA layer After the first PA layer and the second PA layer or the second EVOH layer are bonded together by the first glue layer, and the multilayered co-extruded film and the first PE layer or the PP layer are extruded through the first SPE layer, Two SPE layers are formed.
  • SPE is specially modified PE
  • EVOH is ethylene-vinyl alcohol copolymer
  • PET-G is amorphous PET (polyethylene terephthalate).
  • the overall structure is basically symmetrical, and the combination of blown film and extrusion process can completely improve the shortcomings of the two single processes, and the thickness of the package can be reduced.
  • the original coextruded or composite film is generally 150 in thickness. ⁇ 160um, and now the thickness of the packaging film made by the new process is only about 125 ⁇ 130um), which reduces the cost.
  • the PA layer is set to provide sufficient tensile strength when dropped (the drop test shows that it falls to the concrete floor three times without breaking at a height of 2.5 m); if an ultra-high barrier is required, one of the PAs can be replaced with EVOH.
  • the use of two layers of PA increases the tensile strength to the extreme.
  • Printing in the ink layer gives the product different image display requirements; if the surface printing ink will contaminate the heat seal layer and the contents.
  • the SPE layer acts as a layer bonding; the first PE layer can provide heat sealing performance by using PE or PA, and the PET-G layer is used for the outer layer of the co-extruded film.
  • the PET-G gloss is high, and the drop resistance is good at low temperature. .
  • the multilayer co-extruded film comprises a second PE layer or a PET-G layer, a first adhesive layer, and a third PA layer which are sequentially disposed.
  • the second adhesive layer and the third PE layer are coextruded.
  • PP is polypropylene.
  • Multi-layer co-extruded film (Coex) different layers and material choices give the overall different barrier properties.
  • the first SPE layer and the second SPE layer are made of the same material, and one or more of EBA, EMA, and EMAA are graft-modified with MAH; the glue used in the first glue layer is polyurethane gum.
  • EBA is ethylene butyl acrylate
  • EMA is ethylene-methyl acrylate copolymer
  • EMAA also known as sarin resin
  • MAH is maleic anhydride.
  • Such specially modified PEs have good interlayer bonding.
  • the thickness of the multi-layer co-extruded film is 40-60 um, wherein the thickness of each layer is: 10 to 20 um of the first SPE layer, and the second SPE layer 10 to 20 ⁇ m, 1 to 5 ⁇ m of the first glue layer, 18 to 40 ⁇ m of the first PE layer or PP layer, 10 to 25 ⁇ m of the first PA layer and the second PA layer, 10 to 25 ⁇ m of the second EVOH layer, and 1 to 2 ⁇ m of the ink layer.
  • the PA in the first PA layer and the second PA layer is BOPA or CPA.
  • CPA is a cast PA (without biaxial stretching).
  • a method for manufacturing a high-barrier packaging film for a large-capacity liquid automatic filling machine comprising the following process steps: extruding 40 to 60 um through a nine-layer co-extrusion apparatus a layer of coextruded film, after the ink layer is printed on the first PA layer, the first PA layer and the second PA layer or the second EVOH layer are bonded together through the first glue layer, and then through the extrusion device, using 10-20 um
  • the laminating film bonds the first PA layer bonded together by the first glue layer to the first PA layer or the second PA layer or the second EVOH layer, the first PE layer or the PP layer.
  • the 10-20um coating is the first SPE layer and the second SPE layer, which bond the materials on both sides together by extrusion coating, such as the first SPE layer is extruded through the flat die, in the heat ( In the state of melting, bonding with the materials on both sides, through the combination of the co-extrusion blown film and the compounding process, the film has the advantages of both films at the same time, and at the same time, it is difficult to cut, curl, and have poor tear resistance. Disadvantages.
  • the combination of blown film and extrusion process can completely improve the shortcomings of the two single processes, and the thickness of the package can be reduced, thus reducing the cost.
  • the PA layer is set to provide sufficient tensile strength when dropped; the use of two layers of PA to increase the tensile strength to the extreme.
  • the special modification of the SPE layer can play the role of interlayer bonding
  • the first PE layer can provide heat sealing performance by using PE, and the PP layer can be used for packaging special liquid and resistant to hydrogen peroxide sterilization due to less PP low molecular precipitation.
  • Multi-layer co-extruded film selects different layers and materials to achieve the barrier properties required for different packaging films.
  • the film has the advantages of both films at the same time, and at the same time, the defects of being difficult to cut, severely curled, and poor tear resistance are improved.
  • FIG. 1 is a schematic diagram showing the hierarchical structure of a first embodiment of a high barrier packaging film for a large-capacity liquid automatic filling machine according to the present invention
  • FIG. 2 is a schematic diagram of a hierarchical structure according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of a hierarchical structure according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a high-barrier packaging film for a large-capacity liquid automatic filling machine comprising a multi-layer co-extruded film 1 , a first SPE layer 2 , a first PA layer 5 , an ink layer 6 , and a first The glue layer 3, the second PA layer 7, the second SPE layer 9, the first PE layer 10; the multi-layer co-extruded film 1 is coextruded and blown, and the ink layer 6 is printed on the first PA layer 5, the first PA After the layer 5 and the second PA layer 7 are bonded together by the first glue layer 3, the multilayered co-extruded film 1 and the first PE layer 10 are formed by extrusion coating the first SPE layer 2 and the second SPE layer 9.
  • the multilayer coextruded film 1 includes a second PE layer 1-1, a first adhesive layer 1-3, a third PA layer 1-4, a second adhesive layer 1-5, and a third PE layer 1- 6 co-extruded.
  • the first SPE layer 2, the ink layer 6 and the first glue layer 3 have the same material, and all of the EBA, EMA, and EMAA are grafted with MAH.
  • the glue used in the first glue layer is a polyurethane glue.
  • the multilayer coextruded film 1 has a thickness of 40 to 60 um.
  • the invention relates to a method for manufacturing a high-barrier packaging film for a large-capacity liquid automatic filling machine, comprising the following steps: extruding a multilayer co-extruded film 1 of 40-60 um through a nine-layer co-extrusion apparatus, and printing the ink layer on the first PA layer, The first PA layer and the second PA layer are bonded together by the first glue layer, and then the multi-layer co-extruded film 1 is bonded together by the first glue layer 3 by using an extrusion device using a 10-20 um coating. The first PA layer is bonded to the third PA layer and the first PE layer 10.
  • the packaging film has been tested by the drop resistance test and dropped to the cement floor three times without breaking at the height of 2.5m; its tensile strength refers to the tensile test method of plastic film of GB-T 13022-1991: 45Mpa, anti-puncture (acupuncture) force is 25N, dart impact reference GBT 9639.1 plastic film and sheet impact resistance test method free dart method Part 1: step method is 1800g, its right angle tear strength with reference QBT 1130-1991 plastic right angle tear performance test method test 8N .
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the multi-layer co-extruded film 1, the first SPE layer 2, the first PA layer 5, the ink layer 6, the first glue layer 3, and the second EVOH are sequentially disposed.
  • the multilayer coextruded film 1 includes a PET-G layer 1-2, a first adhesive layer 1-3, a third PA layer 1-4, a second adhesive layer 1-5, and a third PE layer 1- 6 co-extruded.
  • the invention relates to a method for manufacturing a high-barrier packaging film for a large-capacity liquid automatic filling machine, comprising the following steps: extruding a multilayer co-extruded film 1 of 40-60 um through a nine-layer co-extrusion apparatus, and printing the ink layer on the first PA layer, The first PA layer and the second EVOH layer are bonded together by the first glue layer, and then the multi-layer co-extruded film is bonded together by the first glue layer by using a 10-20 um laminating film through an extrusion device. A PA layer is bonded to the three portions of the second EVOH layer and the PP layer.
  • the packaging film has been tested by the drop resistance test and dropped to a concrete floor at a height of 2.5 m.
  • the tensile strength is in accordance with GB-T 13022-1991 plastic film tensile performance test method: 46Mpa, anti-puncture (acupuncture) force is 28N, dart impact reference GBT 9639.1 plastic film and sheet impact resistance test method
  • Free dart method Part 1 The step method is 1850g, and its right-angle tear strength is tested to 10N according to QBT 1130-1991 plastic right angle tear performance test method.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the multi-layer co-extruded film 1, the first SPE layer 2, the first PA layer 5, the ink layer 6, the first glue layer 3, and the second PA are sequentially disposed.
  • Layer 7, second SPE layer 9, first PE layer 10; multi-layer co-extruded film 1 co-extruded and blown film, ink layer 6 printed on first PA layer 5, first PA layer 5 and second PA layer 7 is formed by bonding the first glue layer 3 together with the multilayer co-extruded film 1 and the first PE layer 10 by extrusion coating the first SPE layer 2 and the second SPE layer 9.
  • the multilayer coextruded film 1 includes a second PE layer 1-1, a first adhesive layer 1-3, a third PA layer 1-4, a second adhesive layer 1-5, and a third PE layer 1- 6 co-extruded.
  • the invention relates to a method for manufacturing a high-barrier packaging film for a large-capacity liquid automatic filling machine, comprising the following steps: extruding a multilayer co-extruded film 1 of 40-60 um through a nine-layer co-extrusion apparatus, and printing the ink layer on the first PA layer, The first PA layer and the second PA layer are bonded together by the first glue layer, and then the multi-layer co-extruded film 1 is bonded together by the first glue layer 3 by using an extrusion device using a 10-20 um coating. The first PA layer is bonded to the third PA layer and the first PE layer 10.
  • the packaging film has been tested by the drop resistance test and dropped to the cement floor three times without breaking at the height of 2.5m; its tensile strength refers to the tensile test method of plastic film of GB-T 13022-1991: 45Mpa, anti-puncture (acupuncture) force is 28N, dart impact reference GBT 9639.1 plastic film and sheet impact resistance test method free dart method Part 1: step method is 1800g, its right angle tear strength according to QBT 1130-1991 plastic right angle tear performance test method test is 9N .

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Abstract

一种大容量液体自动灌装机用高阻隔包装膜以及制造此包装膜的方法，该包装膜包括依次设置的多层共挤薄膜（1）、第一SPE层（2）、第一PA层（5）、油墨层（6）、第一胶水层（3）、第二PA层（7）或第二EVOH层（8）、第二SPE层（9）、第一PE层（10）或PP层（4）；多层共挤薄膜（1）共挤吹膜而成，油墨层（6）印刷在第一PA层（5）后，第一PA层（5）与第二PA层（7）或第二EVOH层（8）通过第一胶水层（3）粘合在一起后与多层共挤薄膜（1）以及第一PE层（10）或PP层（4）通过挤复淋膜第一SPE层（2）、第二SPE层（9）而成。通过共挤吹膜和复合工序相结合，使薄膜同时具有两种薄膜的优点，同时改善了难切断、卷曲严重、抗撕裂能力差的缺点。

Description

一种大容量液体自动灌装机用高阻隔包装膜及其制造方法 技术领域
本发明涉及一种大容量液体自动灌装机用高阻隔包装膜及其制造方法。
背景技术
目前液体包装一般采用多层共挤阻隔膜或者PET(即聚对苯二甲酸乙二醇酯)、BOPA(双向拉伸尼龙薄膜)等复合PE(聚乙烯)，前者切断性不佳，抗拉强度和抗穿刺性能差，后者抗跌落性能不佳，易卷曲。目前的共挤阻隔膜的结构一般为：PE/Tie/PA/Tie/PE(即聚乙烯层/粘合层/尼龙层/粘合层/聚乙烯层)，该方法生产出来的薄膜抗跌落性能较好，耐穿刺强度不够好，且当PA层比例超过25％时，设备很难加工会导致膜泡不稳，薄膜有褶皱，且难切断；复合膜的结构为：PET/INK/BOPA/PE(其中INK为油墨层)，通过干复或者挤复工艺生产，薄膜卷曲严重，抗撕裂能力差；
申请公布号为CN 102602096 A的专利：一种液体药剂包装用复合高阻隔薄膜，其由七层薄膜通过共挤后复合而成，所述七层薄膜由外至内分别为PP层、TL层、PA层、EVOH层、PA层、TL层和Pemet层。其阻隔性能可以，但仍为共挤制成的包装膜，耐穿刺强度和切断性不好。申请公布号为CN 103203919 A的专利：一种高阻隔半高温蒸煮液体包装材料及由其制成的包装袋，是由干式复合机将聚酯薄膜(PET层、铝箔(Al)层、尼龙(PA)层和聚乙烯薄膜(PE)层四层薄膜自上而下叠放后复合制成复合膜，其抗撕裂能力不行，卷曲严重。
发明内容
本发明主要解决的技术问题在于，提供一种大容量液体自动灌装 机用高阻隔包装膜，其切断性优良，抗拉强度高、抗穿刺性能好，抗跌落性能佳，不易卷曲。
本发明解决其技术问题所采用的技术方案是：一种大容量液体自动灌装机用高阻隔包装膜，包括依次设置的多层共挤薄膜、第一SPE层、第一PA层、油墨层、第一胶水层、第二PA层或第二EVOH层、第二SPE层、第一PE层或PP层；多层共挤薄膜共挤吹膜而成，油墨层印刷在第一PA层后，第一PA层与第二PA层或第二EVOH层通过第一胶水层粘合在一起后与多层共挤薄膜以及第一PE层或PP层通过挤复淋膜第一SPE层、第二SPE层而成。其中，SPE即特殊改性PE，EVOH即乙烯-乙烯醇共聚物，PET-G即非结晶性PET(聚对苯二甲酸乙二醇酯)。整体结构基本对称，吹膜与挤复工艺相结合，可彻底改善两种单一工艺的缺点，且包装厚度可以减薄(针对大的包装袋，原来的共挤膜或复合膜其厚度一般为150～160um，而现在采用新工艺制成的包装膜厚度只要125～130um左右)，这样降低了成本。PA层的设置使得跌落时提供足够的抗拉强度(耐摔测试显示在2.5m高处落下至水泥地面三次不破裂)；如果需要超高阻隔，则可以将其中一层PA更换为EVOH。采用两层PA使抗拉强度提升到了极致。采用油墨层里印，赋予产品不同的图像展示要求；如果表印油墨会污染热封层和内容物。SPE层则起到层间粘结的作用；第一PE层采用PE或PA可以提供热封性能，共挤膜外层采用PET-G层由于PET-G光泽度高，低温下抗跌落性能佳。
作为本发明一种大容量液体自动灌装机用高阻隔包装膜的进一步改进，多层共挤薄膜包括依次设置的第二PE层或PET-G层、第一粘合层、第三PA层、第二粘合层及第三PE层共挤而成。其中，PP即聚丙烯。多层共挤薄膜(Coex)，不同的层次结构和材质选择赋予整体不同的阻隔性能。
作为本发明一种大容量液体自动灌装机用高阻隔包装膜的进一 步改进，第一SPE层、第二SPE层的材质相同，均为EBA、EMA、EMAA中的一种或多种与MAH接枝改性而成；所述第一胶水层中所用胶水为聚氨酯胶。其中，EBA即乙烯丙烯酸丁酯，EMA即乙烯-丙烯酸甲酯共聚物，EMAA(又称沙林树脂)即乙烯甲基丙烯酸共聚物，MAH即马来酸酐。这样特殊改性的PE其层间粘结很好。
作为本发明一种大容量液体自动灌装机用高阻隔包装膜的进一步改进，多层共挤薄膜厚度为40～60um，其中各层厚度为：第一SPE层10～20um、第二SPE层10～20um、第一胶水层2～5um、第一PE层或PP层18～40um、第一PA层与第二PA层10～25um、第二EVOH层10～25um，油墨层1～2um。
作为本发明一种大容量液体自动灌装机用高阻隔包装膜的进一步改进，第一PA层与第二PA层中的PA为BOPA或CPA。CPA即流延PA(没有经过双向拉伸)。
制造大容量液体自动灌装机用高阻隔包装膜的方法，制造大容量液体自动灌装机用高阻隔包装膜的方法，包括如下工艺步骤：经过九层共挤设备挤出40～60um的多层共挤薄膜，油墨层印刷在第一PA层后，第一PA层与第二PA层或第二EVOH层通过第一胶水层粘合在一起，再通过挤复设备，使用10～20um的淋膜将多层共挤薄膜、通过第一胶水层粘合在一起的第一PA层与第二PA层或第二EVOH层、第一PE层或PP层这三部分粘接在一起。10-20um的淋膜为第一SPE层、第二SPE层，其将两侧的材料通过挤复淋膜的方式粘接在一起，如第一SPE层通过平模头挤出，在热(融化)的状态下，与两侧的材料粘合，通过共挤吹膜和复合工序相结合，使薄膜同时具有两种薄膜的优点，同时改善了难切断、卷曲严重、抗撕裂能力差的缺点。
本发明的有益效果有：
1、切断性优良，抗拉强度高、抗穿刺性能好，抗跌落性能佳，不易卷曲。
2、吹膜与挤复工艺相结合，可彻底改善两种单一工艺的缺点，且包装厚度可以减薄，这样降低了成本。
3、PA层的设置使得跌落时提供足够的抗拉强度；采用两层PA使抗拉强度提升到了极致。
4、采用油墨层里印，赋予产品不同的图像展示要求；避免表印油墨污染热封层和内容物。
5、SPE层采用特殊改性可起到层间粘结的作用；
6、第一PE层采用PE可以提供热封性能，而采用PP层由于PP低分子析出物更少，可用于包装特殊的液体，耐双氧水杀菌等优点。
7、多层共挤薄膜(Coex)选择不同的层次结构和材质，可达到不同包装膜所需的阻隔性能
8、通过共挤吹膜和复合工序相结合，使薄膜同时具有两种薄膜的优点，同时改善了难切断、卷曲严重、抗撕裂能力差的缺点。
附图说明
图1为本发明一种大容量液体自动灌装机用高阻隔包装膜实施例一的层次结构示意图；
图2为本发明实施例二的层次结构示意图；
[根据细则91更正 07.11.2017]　
图3为本发明实施例三的层次结构示意图。
[根据细则91更正 07.11.2017]　
[根据细则91更正 07.11.2017]　
[根据细则91更正 07.11.2017]　
图中：1、多层共挤薄膜 1-1、第二PE层 1-2、PET-G层 1-3、第一粘合层 1-4、第三PA层 1-5、第二粘合层 1-6、第三PE层 2、第一SPE层 3、第一胶水层 4、PP层 5、第一PA层 6、油墨层 7、第二PA层 8、第二EVOH层 9、第二SPE层 10、第一PE层。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
本发明中所涉及的各物质的中英文对照如下：
PET    聚对苯二甲酸乙二醇酯
BOPA   双向拉伸尼龙薄膜
PE     聚乙烯
INK    油墨层
Tie    粘合层
PA     尼龙
SPE    特殊改性PE
EVOH   乙烯-乙烯醇共聚物
PET-G  非结晶性PET
PP     聚丙烯
EBA    乙烯丙烯酸丁酯
EMA    乙烯-丙烯酸甲酯共聚物
EMAA   沙林树脂,即乙烯甲基丙烯酸共聚物
MAH    马来酸酐
实施例一：
如图1所示，一种大容量液体自动灌装机用高阻隔包装膜，包括依次设置的多层共挤薄膜1、第一SPE层2、第一PA层5、油墨层6、第一胶水层3、第二PA层7、第二SPE层9、第一PE层10；多层共挤薄膜1共挤吹膜而成，油墨层6印刷在第一PA层5后，第一PA层5与第二PA层7通过第一胶水层3粘合在一起后与多层共挤薄膜1以及第一PE层10通过挤复淋膜第一SPE层2、第二SPE层9而成。多层共挤薄膜1包括依次设置的第二PE层1-1、第一粘合层1-3、第三PA层1-4、第二粘合层1-5及第三PE层1-6共挤而成。第一SPE层2、油墨层6与第一胶水层3的材质相同，均为EBA、EMA、EMAA中的一种或多种与MAH接枝改 性而成；所述第一胶水层中所用胶水为聚氨酯胶。多层共挤薄膜1厚度为40～60um。
制造大容量液体自动灌装机用高阻隔包装膜的方法，包括如下工艺步骤：经过九层共挤设备挤出40～60um的多层共挤薄膜1，油墨层印刷在第一PA层后，第一PA层与第二PA层通过第一胶水层粘合在一起，再通过挤复设备，使用10～20um的淋膜将多层共挤薄膜1、通过第一胶水层3粘合在一起的第一PA层与第二PA层、第一PE层10这三部分粘结在一起。本包装膜经耐摔测试显示在2.5m高处落下至水泥地面三次不破裂；其拉伸强度参照GB-T 13022-1991塑料薄膜拉伸性能试验方法：45Mpa，抗穿刺(针刺)力为25N，落镖冲击参照GBT 9639.1塑料薄膜和薄片抗冲击性能试验方法自由落镖法第1部分：梯级法为1800g，其直角撕裂强度参照QBT 1130-1991塑料直角撕裂性能试验方法测试为8N。
实施例二：
与实施例一的不同在于：如图2所示，包括依次设置的多层共挤薄膜1、第一SPE层2、第一PA层5、油墨层6、第一胶水层3、第二EVOH层8、第二SPE层9、PP层4；多层共挤薄膜1共挤吹膜而成，油墨层印刷在第一PA层后，第一PA层与第二EVOH层通过第一胶水层粘合在一起后与多层共挤薄膜以及PP层通过挤复淋膜第一SPE层、第二SPE层而成。多层共挤薄膜1包括依次设置的PET-G层1-2、第一粘合层1-3、第三PA层1-4、第二粘合层1-5及第三PE层1-6共挤而成。
制造大容量液体自动灌装机用高阻隔包装膜的方法，包括如下工艺步骤：经过九层共挤设备挤出40～60um的多层共挤薄膜1，油墨层印刷在第一PA层后，第一PA层与第二EVOH层通过第一胶水层粘合在一起，再通过挤复设备，使用10～20um的淋膜将多层共挤薄膜、通过第一胶水层粘合在一起的第一PA层与第二EVOH层、PP层这三部分粘接在一起。本包装膜经耐摔测试显示在2.5m高处落下至水泥地面三 次不破裂；其拉伸强度参照GB-T 13022-1991塑料薄膜拉伸性能试验方法：46Mpa，抗穿刺(针刺)力为28N，落镖冲击参照GBT 9639.1塑料薄膜和薄片抗冲击性能试验方法自由落镖法第1部分：梯级法为1850g，其直角撕裂强度参照QBT 1130-1991塑料直角撕裂性能试验方法测试为10N。
实施例三：
与实施例一的不同在于，如图3所示，包括依次设置的多层共挤薄膜1、第一SPE层2、第一PA层5、油墨层6、第一胶水层3、第二PA层7、第二SPE层9、第一PE层10；多层共挤薄膜1共挤吹膜而成，油墨层6印刷在第一PA层5后，第一PA层5与第二PA层7通过第一胶水层3粘合在一起后与多层共挤薄膜1以及第一PE层10通过挤复淋膜第一SPE层2、第二SPE层9而成。多层共挤薄膜1包括依次设置的第二PE层1-1、第一粘合层1-3、第三PA层1-4、第二粘合层1-5及第三PE层1-6共挤而成。
制造大容量液体自动灌装机用高阻隔包装膜的方法，包括如下工艺步骤：经过九层共挤设备挤出40～60um的多层共挤薄膜1，油墨层印刷在第一PA层后，第一PA层与第二PA层通过第一胶水层粘合在一起，再通过挤复设备，使用10～20um的淋膜将多层共挤薄膜1、通过第一胶水层3粘合在一起的第一PA层与第二PA层、第一PE层10这三部分粘结在一起。本包装膜经耐摔测试显示在2.5m高处落下至水泥地面三次不破裂；其拉伸强度参照GB-T 13022-1991塑料薄膜拉伸性能试验方法：45Mpa，抗穿刺(针刺)力为28N，落镖冲击参照GBT 9639.1塑料薄膜和薄片抗冲击性能试验方法自由落镖法第1部分：梯级法为1800g，其直角撕裂强度参照QBT 1130-1991塑料直角撕裂性能试验方法测试为9N。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以 做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (6)

  1. 一种大容量液体自动灌装机用高阻隔包装膜，其特征在于，包括依次设置的多层共挤薄膜、第一SPE层、第一PA层、油墨层、第一胶水层、第二PA层或第二EVOH层、第二SPE层、第一PE层或PP层；多层共挤薄膜共挤吹膜而成，油墨层印刷在第一PA层后，第一PA层与第二PA层或第二EVOH层通过第一胶水层粘合在一起后与多层共挤薄膜以及第一PE层或PP层通过挤复淋膜第一SPE层、第二SPE层而成。
  2. 根据权利要求1所述的大容量液体自动灌装机用高阻隔包装膜，其特征在于，所述多层共挤薄膜包括依次设置的第二PE层或PET-G层、第一粘合层、第三PA层、第二粘合层及第三PE层共挤而成。
  3. 根据权利要求1所述的大容量液体自动灌装机用高阻隔包装膜，其特征在于，所述第一SPE层、第二SPE层的材质相同，均为EBA、EMA、EMAA中的一种或多种与MAH接枝改性而成；所述第一胶水层中所用胶水为聚氨酯胶。
  4. 根据权利要求1所述的大容量液体自动灌装机用高阻隔包装膜，其特征在于，所述多层共挤薄膜厚度为40～60um，其中各层厚度为：第一SPE层10～20um、第二SPE层10～20um、第一胶水层2～5um、第一PE层或PP层18～40um、第一PA层与第二PA层10～25um、第二EVOH层10～25um，油墨层1～2um。
  5. 根据权利要求4所述的大容量液体自动灌装机用高阻隔包装膜，其特征在于，所述第一PA层与第二PA层中的PA为BOPA或CPA。
  6. 制造如权利要求1至5中任一项所述的大容量液体自动灌装机用高阻隔包装膜的方法，其特征在于，包括如下工艺步骤：经过九层共挤设备挤出40～60um的多层共挤薄膜，油墨层印刷在第一PA层后，第一PA层与第二PA层或第二EVOH层通过第一胶水层粘合在一起，再 通过挤复设备，使用10～20um的淋膜将多层共挤薄膜、通过第一胶水层粘合在一起的第一PA层与第二PA层或第二EVOH层、第一PE层或PP层这三部分粘接在一起。
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