WO2016173287A1 - 离型膜用压纹基材膜的制造工艺 - Google Patents

离型膜用压纹基材膜的制造工艺 Download PDF

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WO2016173287A1
WO2016173287A1 PCT/CN2015/099355 CN2015099355W WO2016173287A1 WO 2016173287 A1 WO2016173287 A1 WO 2016173287A1 CN 2015099355 W CN2015099355 W CN 2015099355W WO 2016173287 A1 WO2016173287 A1 WO 2016173287A1
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embossed
parts
styrene
mixture
polyester film
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PCT/CN2015/099355
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English (en)
French (fr)
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金闯
周满意
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苏州斯迪克新材料科技股份有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes

Definitions

  • the invention relates to a manufacturing process of an embossed base film for a release film, and belongs to the technical field of release materials.
  • the release film refers to the surface of the polyester film coated with silicone oil to prevent sticking; the surface of the release film can have a smooth surface and a matte surface, but the pressure-sensitive adhesive tape made of the conventional release film and When the label tape is used, the cosmetic surface beautification effect is not satisfactory, and when the ordinary release film is bonded to the pressure-sensitive adhesive tape, bubbles are easily generated between the two.
  • embossed release paper although it can achieve the effect of bubble discharge, but because the release paper is easy to absorb water, tear strength is not high, it is difficult to observe the rubber surface, after die cutting, the edge has paper scraps and other shortcomings, can not be high-end The product is used.
  • the object of the present invention is to provide a manufacturing process for an embossed base film for a release film, which is obtained by obtaining a clear, shallow and uniform embossing pattern of the embossed base film for the release film, and the distribution line is uniform, and the pressure is formed.
  • the film release film is bonded to the pressure sensitive adhesive, no bubbles are generated between the two, so that the use effect is not affected.
  • the technical solution adopted by the present invention is: a manufacturing process of an embossed base film for a release film, comprising the following steps:
  • Step 1 The preparation process of the coating layer is as follows:
  • Step 1 100 parts of high-density polyethylene, 120-180 parts of low-density polyethylene, 10 parts to 30 parts of styrene-isoprene-styrene block copolymer, block copolymerization of styrene and butadiene 5 to 15 parts, 0.5 to 1.5 parts of paraffin, 0.1 to 0.5 parts of glycerin, 5 to 10 parts of POE polyolefin elastomer, and 0.3 to 0.8 parts of coupling agent are placed in a stirrer and stirred for 20 to 30 minutes to form a mixture;
  • Step 2 the mixture obtained in the first step is heated and bridged through the twin screw of the feeding port of the laminating machine to obtain a molten mixture, and the temperature of the heating bridge is 150 to 200 ° C;
  • Step 3 The melted mixture obtained in the second step is again melted and mixed at the feed screw. Further heating to 220 ⁇ 250 ° C, thereby obtaining a fluid mixture, while pressing to 5 ⁇ 15Mpa;
  • Step 4 the third step is to obtain a fluid mixture at the screw outlet to be heated again to 260 ⁇ 280 ° C to heat and become cloth-like extrusion;
  • Step 2 The polyester film layer is attached to the unwinding reel of the laminating machine, and the polyester film layer is introduced through the guiding roller. During the introduction process, the laminating machine performs corona polishing on the surface of the polyester film layer. When the polyester film layer enters the embossed composite wheel on the laminating machine, the extruded coating layer is coated onto the surface of the polyester film layer by a composite wheel, and is added by an embossed composite wheel.
  • the embossed surface of the composite embossing and embossing wheel is in contact with the coating layer, and after cooling, it is cooled to 30 to 40 ° C, and then cooled through a low temperature cooling wheel to 10 to 15 ° C, thereby coating the coating layer with The opposite surface of the polyester film layer forms an embossed pattern area, and then the paper is slit.
  • the POE polyolefin elastomer is a high polymer of ethylene and octene.
  • the ratio of the styrene-isoprene-styrene block copolymer to the block copolymer of styrene and butadiene is 2:0.9 to 1.
  • the coupling agent is a silane coupling agent.
  • the temperature of the heating zone of the twin-screw extruder is 150 ° C, 180 ° C, 190 ° C, 220 ° C, 230 ° C, 250 ° C, 250 ° C, 260 ° C and 280 ° C, respectively.
  • the degree is 0.05 to 0.07.
  • the present invention has the following advantages and effects compared with the prior art:
  • the manufacturing process of the embossed base film for the release film of the invention has the advantages that the embossed embossing pattern is clear, the depth is uniform, the distribution line is uniform, and the formed embossed release film is bonded to the pressure sensitive adhesive. No bubbles will be generated between the two, so as not to affect the use effect; secondly, it is added to the styrene-isoprene-styrene block copolymer 10 parts to 30 parts, block copolymerization of styrene and butadiene 5 to 15 parts and 5 to 10 parts of POE polyolefin elastomer, and 0.3 to 0.8 parts of coupling agent, so that the adhesion between the release agent layer and the polyester film layer is more tight, and the residual adhesion rate is greatly improved.
  • the release layer is not easy to fall off, and the antistatic property of the film is also improved.
  • FIG. 1 is a schematic view showing the structure of an embossed base film for a release film of the present invention.
  • polyester film layer 1, coating layer; 3, embossed pattern area.
  • Embodiments 1 to 5 A manufacturing process of an embossed base film for a release film, comprising the following steps:
  • Step 1 The preparation process of the coating layer is as follows:
  • Step 1 100 parts of high-density polyethylene, 120-180 parts of low-density polyethylene, 10 parts to 30 parts of styrene-isoprene-styrene block copolymer, block copolymerization of styrene and butadiene 5 to 15 parts, 0.5 to 1.5 parts of paraffin, 0.1 to 0.5 parts of glycerin, 5 to 10 parts of POE polyolefin elastomer, 0.3 to 0.8 parts of coupling agent, and placed in a stirrer for mixing for 20 to 30 minutes to form a mixture. ;
  • Step 2 the mixture obtained in the first step is heated and bridged through the twin screw of the feeding port of the laminating machine to obtain a molten mixture, and the temperature of the heating bridge is 150 to 200 ° C;
  • Step 3 the molten mixture obtained in the second step is further heated to 220-250 ° C at the feed screw to obtain a fluid mixture, while pressing to 5 ⁇ 15Mpa;
  • Step 4 the third step is to obtain a fluid mixture at the screw outlet to be heated again to 260 ⁇ 280 ° C to heat and become cloth-like extrusion;
  • Step 2 The polyester film layer 1 is attached to the unwinding reel of the laminating machine, and the polyester film layer is introduced through the guiding roller. During the introduction process, the laminating machine performs corona polishing on the surface of the polyester film layer.
  • the extruded coating layer is coated onto the surface of the polyester film layer by a composite wheel, and is subjected to an embossed composite wheel.
  • the embossed surface of the pressure composite embossing and embossing wheel is in contact with the coating layer, and after cooling, it is cooled to 30 to 40 ° C, and then cooled by a low temperature cooling wheel to 10 to 15 ° C, thereby coating the coating layer.
  • An embossed pattern area 3 is formed on the surface opposite to the polyester film layer 1, and then the paper is slit.
  • the temperature of the heating zone of the above-mentioned twin-screw extruder is 150 ° C, 180 ° C, 190 ° C, 220 ° C, 230 ° C, 250 ° C, 250 ° C, 260 ° C and 280 ° C, and the degree of vacuum is 0.05 to 0.07.
  • Example 1 is a high polymer of ethylene and octene
  • Example 2 is a high polymer of ethylene and octene
  • Example 2 is a high polymer of ethylene and butene
  • Example 2 is a polymer of ethylene and butene
  • Example 2 is a high polymer of ethylene and octene.
  • the ratio of the above styrene-isoprene-styrene block copolymer to block copolymer of styrene and butadiene is: 2:1 in Example 1, 2:1.05 in Example 2, and Example 3 2:0.9, Example 4 is 2:1, and Example 4 is 2:0.95.
  • Comparative Example 1 A manufacturing process of an embossed base film for a release film, comprising the following steps:
  • Step 1 forming an embossed pattern area 3 on the surface of the coating layer 2 opposite to the polyester film layer 1, and then cutting the paper;
  • Step 2 applying a silicone release agent layer 4 on the surface of the coating layer 2 having the embossed pattern region 3 to prepare the embossed coating release film, wherein the coating layer is composed of the following The composition of parts by weight, 100 parts of high-density polyethylene and 125 parts of low-density polyethylene.
  • Comparative Example 2 A method for making an embossed release film comprising the following steps:
  • Step 1 forming an embossed pattern area 3 on the surface of the coating layer 2 opposite to the polyester film layer 1, and then cutting the paper;
  • Step 2 applying a silicone release agent layer 4 on the surface of the coating layer 2 having the embossed pattern region 3 to prepare the embossed coating release film, wherein the coating layer is composed of the following The composition of parts by weight, 100 parts of high-density polyethylene and 150 parts of low-density polyethylene.
  • the embossed base film for the release film obtained by the above-mentioned manufacturing process has a clear texture, a uniform depth and a uniform distribution line, and the formed embossed release film is bonded to the pressure sensitive adhesive. No bubbles will be generated between the two, so that the effect will not be affected.
  • it is added with 10 to 30 parts of styrene-isoprene-styrene block copolymer, and blocks of styrene and butadiene.
  • the copolymer has 5 to 15 parts and 5 to 10 parts of the POE polyolefin elastomer, and the coupling agent is 0.3 to 0.8 parts, so that the adhesion between the release agent layer and the polyester film layer is more tight, and the residue is greatly improved.
  • the rate of the release layer is not easy to fall off, and the antistatic property of the film is also improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

本发明公开一种离型膜用压纹基材膜的制造工艺，包括以下步骤：将高密度聚乙烯、低密度聚乙烯、苯乙烯-异戊二烯-苯乙烯嵌段共聚物、苯乙烯与丁二烯的嵌段共聚物、石蜡、甘油、POE聚烯烃弹性体、偶联剂放入搅拌器内搅；将混合物通过淋膜机进料口的双螺杆进行加热架桥获得熔化后混合物；将熔化后混合物在进料螺杆处再次对熔化后混合物进一步加热，从而获得流体状混合物；将流体状混合物在螺杆出口处再次加热至260～280℃加热并变成布状被挤出；将聚酯薄膜层装到淋膜机的放卷轴上，在淋膜涂覆层与聚酯薄膜层相背的表面形成压纹图案区。本发明获得的压纹基材膜网状纹路压纹清晰、深浅统一，分布线均匀，形成的压纹淋膜离型纸在与压敏胶贴合时两者之间不会产生气泡，从而不会影响到使用效果。

Description

离型膜用压纹基材膜的制造工艺 技术领域
本发明涉及一种离型膜用压纹基材膜的制造工艺，属于离型材料技术领域。
背景技术
通常离型膜是指在聚酯薄膜表面涂布有机硅油，起到防粘的作用；离型膜表面可以有光面和哑面，但这种传统的离型膜制作的压敏胶胶带及标签胶带时，胶面美化效果不理想，普通的离型膜与压敏胶胶带贴合时，两者之间容易产生气泡。采用压纹离型纸，虽然可以达到排气泡的效果，但是由于离型纸容易吸水、抗撕裂强度不高，不易观察胶面、模切后，边缘有纸屑等缺点，不能被高端产品所使用。
发明内容
本发明目的是提供一种离型膜用压纹基材膜的制造工艺，该制造工艺获得离型膜用压纹基材膜网状纹路压纹清晰、深浅统一，分布线均匀，形成的压纹淋膜离型膜在与压敏胶贴合时两者之间不会产生气泡，从而不会影响到使用效果。
为达到上述目的，本发明采用的技术方案是：一种离型膜用压纹基材膜的制造工艺，包括以下步骤：
步骤一：淋膜涂覆层的制备工艺如下：
步骤1、将高密度聚乙烯100份、低密度聚乙烯120～180份、苯乙烯-异戊二烯-苯乙烯嵌段共聚物10份～30份、苯乙烯与丁二烯的嵌段共聚物5份～15份、石蜡0.5～1.5份、甘油0.1～0.5份、POE聚烯烃弹性体5～10份，偶联剂0.3～0.8份放入搅拌器内进行混合搅拌20～30min形成混合物；
步骤2、将步骤一获得的混合物通过淋膜机进料口的双螺杆进行加热架桥获得熔化后混合物，此加热架桥的温度为150～200℃；
步骤3、将步骤二获得的熔化后混合物在进料螺杆处再次对熔化后混合 物进一步加热至220～250℃，从而获得流体状混合物，同时进行加压至5～15Mpa；
步骤4、将步骤三获得流体状混合物在螺杆出口处再次加热至260～280℃加热并变成布状被挤出；
步骤二：将聚酯薄膜层装到淋膜机的放卷轴上，通过导辊将聚酯薄膜层引入，引入的过程中，淋膜机对聚酯薄膜层表面进行电晕抛毛处理，当聚酯薄膜层进入淋膜机上带压纹的复合轮时，挤出的所述淋膜涂覆层通过复合轮淋膜至聚酯薄膜层表面，并且通过有压纹的复合轮对其进行加压复合压纹、压纹轮的压纹面与淋膜涂覆层接触，复合后冷却至30～40℃，再进过低温冷却轮冷却至10～15℃，从而在淋膜涂覆层与聚酯薄膜层相背的表面形成压纹图案区，然后对纸张进行分切。
上述技术方案中进一步改进的方案如下：
1、上述方案中，所述POE聚烯烃弹性体为乙烯和辛烯的高聚物。
2、上述方案中，所述苯乙烯-异戊二烯-苯乙烯嵌段共聚物与苯乙烯与丁二烯的嵌段共聚物的比例为2：0.9～1。
3、上述方案中，所述偶联剂为硅烷偶联剂。
4、上述方案中，所述双螺杆挤出机9节加温区域温度分别为150℃、180℃、190℃、,220℃、230℃、250℃、250℃、260℃和280℃，真空度为0.05～0.07。
由于上述技术方案运用，本发明与现有技术相比具有下列优点和效果：
本发明离型膜用压纹基材膜的制造工艺，其形成的网状纹路压纹清晰、深浅统一，分布线均匀，形成的压纹淋膜离型膜在与压敏胶贴合时两者之间不会产生气泡，从而不会影响到使用效果；其次，其加入苯乙烯-异戊二烯-苯乙烯嵌段共聚物10份～30份、苯乙烯与丁二烯的嵌段共聚物5份～15份和POE聚烯烃弹性体5～10份，偶联剂0.3～0.8份，使得离型剂层与聚酯薄膜层间的粘结力更加紧密，并大大改善了残余接着率，离型层不易脱落，并目还改善了膜的防静电性能。
附图说明
附图1为本发明离型膜用压纹基材膜结构示意图。
以上附图中：1、聚酯薄膜层；2、淋膜涂覆层；3、压纹图案区。
具体实施方式
下面结合实施例对本发明作进一步描述：
实施例1～5：一种离型膜用压纹基材膜的制造工艺，包括以下步骤：
步骤一：淋膜涂覆层的制备工艺如下：
步骤1、将高密度聚乙烯100份、低密度聚乙烯120～180份、苯乙烯-异戊二烯-苯乙烯嵌段共聚物10份～30份、苯乙烯与丁二烯的嵌段共聚物5份～15份、石蜡0.5～1.5份、甘油0.1～0.5份、POE聚烯烃弹性体5～10份、偶联剂0.3～0.8份，放入搅拌器内进行混合搅拌20～30min形成混合物；
步骤2、将步骤一获得的混合物通过淋膜机进料口的双螺杆进行加热架桥获得熔化后混合物，此加热架桥的温度为150～200℃；
步骤3、将步骤二获得的熔化后混合物在进料螺杆处再次对熔化后混合物进一步加热至220～250℃，从而获得流体状混合物，同时进行加压至5～15Mpa；
步骤4、将步骤三获得流体状混合物在螺杆出口处再次加热至260～280℃加热并变成布状被挤出；
步骤二：将聚酯薄膜层1装到淋膜机的放卷轴上，通过导辊将聚酯薄膜层引入，引入的过程中，淋膜机对聚酯薄膜层表面进行电晕抛毛处理，当聚酯薄膜层进入淋膜机上带压纹的复合轮时，挤出的所述淋膜涂覆层通过复合轮淋膜至聚酯薄膜层表面，并且通过有压纹的复合轮对其进行加压复合压纹、压纹轮的压纹面与淋膜涂覆层接触，复合后冷却至30～40℃，再进过低温冷却轮冷却至10～15℃，从而在淋膜涂覆层2与聚酯薄膜层1相背的表面形成压纹图案区3，然后对纸张进行分切。
上述双螺杆挤出机9节加温区域温度分别为150℃、180℃、190℃、,220℃、230℃、250℃、250℃、260℃和280℃，真空度为0.05～0.07。
实施例1～5中所述淋膜涂覆层由下列重量份的组分组成：表1
Figure PCTCN2015099355-appb-000001
Figure PCTCN2015099355-appb-000002
上述POE聚烯烃弹性体，实施例1为乙烯和辛烯的高聚物，实施例2为乙烯和辛烯的高聚物，实施例2为乙烯和丁烯的高聚物，实施例2为乙烯和丁烯的高聚物，实施例2为乙烯和辛烯的高聚物。
上述苯乙烯-异戊二烯-苯乙烯嵌段共聚物与苯乙烯与丁二烯的嵌段共聚物的比例为：实施例1为2：1、实施例2为2：1.05、实施例3为2：0.9、实施例4为2：1、实施例4为2：0.95。
对比例1：一种离型膜用压纹基材膜的制造工艺，包括以下步骤：
步骤一、在淋膜涂覆层2与聚酯薄膜层1相背的表面形成压纹图案区3，然后对纸张进行分切；
步骤二、在淋膜涂覆层2的具有压纹图案区3的表面涂布有机硅离型剂层4，制备成所述压纹淋膜离型膜，所述淋膜涂覆层由下列重量份的组分组成，高密度聚乙烯100份、低密度聚乙烯125份。
对比例2：一种压纹淋膜离型膜的制作方法，包括以下步骤：
步骤一、在淋膜涂覆层2与聚酯薄膜层1相背的表面形成压纹图案区3，然后对纸张进行分切；
步骤二、在淋膜涂覆层2的具有压纹图案区3的表面涂布有机硅离型剂层4，制备成所述压纹淋膜离型膜，所述淋膜涂覆层由下列重量份的组分组成，高密度聚乙烯100份、低密度聚乙烯150份。
将实施例1～5和对比例方法获得的离型膜用压纹基材膜进行测试，如表2所示：
表2
Figure PCTCN2015099355-appb-000003
采用上述制造工艺获得的离型膜用压纹基材膜，其形成的网状纹路压纹清晰、深浅统一，分布线均匀，形成的压纹淋膜离型膜在与压敏胶贴合时两者之间不会产生气泡，从而不会影响到使用效果；其次，其加入苯乙烯-异戊二烯-苯乙烯嵌段共聚物10份～30份、苯乙烯与丁二烯的嵌段共聚物5份～15份和POE聚烯烃弹性体5～10份，偶联剂0.3～0.8份，使得离型剂层与聚酯薄膜层间的粘结力更加紧密，并大大改善了残余接着率，离型层不易脱落，并目还改善了膜的防静电性能。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (4)

  1. 一种离型膜用压纹基材膜的制造工艺，其特征在于：包括以下步骤：
    步骤一：淋膜涂覆层的制备工艺如下：
    步骤1、将高密度聚乙烯100份、低密度聚乙烯120～180份、苯乙烯-异戊二烯-苯乙烯嵌段共聚物10份～30份、苯乙烯与丁二烯的嵌段共聚物5份～15份、石蜡0.5～1.5份、甘油0.1～0.5份、POE聚烯烃弹性体5～10份，偶联剂0.3～0.8份放入搅拌器内进行混合搅拌20～30min形成混合物；
    步骤2、将步骤一获得的混合物通过淋膜机进料口的双螺杆进行加热架桥获得熔化后混合物，此加热架桥的温度为150～200℃；
    步骤3、将步骤二获得的熔化后混合物在进料螺杆处再次对熔化后混合物进一步加热至220～250℃，从而获得流体状混合物，同时进行加压至5～15Mpa；
    步骤4、将步骤三获得流体状混合物在螺杆出口处再次加热至260～280℃加热并变成布状被挤出；
    步骤二：将聚酯薄膜层(1)装到淋膜机的放卷轴上，通过导辊将聚酯薄膜层引入，引入的过程中，淋膜机对聚酯薄膜层表面进行电晕抛毛处理，当聚酯薄膜层进入淋膜机上带压纹的复合轮时，挤出的所述淋膜涂覆层通过复合轮淋膜至聚酯薄膜层表面，并且通过有压纹的复合轮对其进行加压复合压纹、压纹轮的压纹面与淋膜涂覆层接触，复合后冷却至30～40℃，再进过低温冷却轮冷却至10～15℃，从而在淋膜涂覆层(2)与聚酯薄膜层(1)相背的表面形成压纹图案区(3)，然后对纸张进行分切。
  2. 根据权利要求1所述的离型膜用压纹基材膜的制造工艺，其特征在于：所述POE聚烯烃弹性体为乙烯和辛烯的高聚物。
  3. 根据权利要求1所述的离型膜用压纹基材膜的制造工艺，其特征在于：所述苯乙烯-异戊二烯-苯乙烯嵌段共聚物与苯乙烯与丁二烯的嵌段共聚物的比例为2：0.9～1。
  4. 根据权利要求1所述的离型膜用压纹基材膜的制造工艺，其特征在于：所述双螺杆挤出机9节加温区域温度分别为150℃、180℃、190℃、220℃、230℃、250℃、250℃、260℃和280℃，真空度为0.05～0.07。
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