WO2014023219A1 - Biaxially stretched polypropylene film without adhesive agent for lamination to paper and preparation method thereof - Google Patents

Biaxially stretched polypropylene film without adhesive agent for lamination to paper and preparation method thereof Download PDF

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Publication number
WO2014023219A1
WO2014023219A1 PCT/CN2013/080890 CN2013080890W WO2014023219A1 WO 2014023219 A1 WO2014023219 A1 WO 2014023219A1 CN 2013080890 W CN2013080890 W CN 2013080890W WO 2014023219 A1 WO2014023219 A1 WO 2014023219A1
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WO
WIPO (PCT)
Prior art keywords
paper
polypropylene film
biaxially oriented
layer
plastic composite
Prior art date
Application number
PCT/CN2013/080890
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French (fr)
Chinese (zh)
Inventor
钟玉
Original Assignee
北京康得新复合材料股份有限公司
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Publication of WO2014023219A1 publication Critical patent/WO2014023219A1/en

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Classifications

    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2031/00—Use of polyvinylesters or derivatives thereof as moulding material
    • B29K2031/04—Polymers of vinyl acetate, e.g. PVAc, i.e. polyvinyl acetate
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene

Definitions

  • the invention relates to a glueless biaxially oriented polypropylene film for paper-plastic composite and a preparation method thereof. Background technique
  • Print film is an important means of post-press processing, which determines the final value of the printed product.
  • the film coating process of the printed matter refers to covering the paper printed matter with a plastic film, and using an adhesive in the middle, after heat and pressure treatment, the two different properties of the plastic film and the paper are bonded together to form a paper/plastic combination.
  • a surface decoration processing technology It protects and decorates prints and is widely used in the field of packaging and printing, such as book covers, brochures, maps, advertising gift bags, and advanced packaging boxes.
  • Current coating technology can be broadly divided into instant coating and pre-coated.
  • the film coating technology is the post-printing process for printed matter and packaging products that emerged in the 1960s.
  • this technology directly uses benzene-containing solvents in the laminating process, causing air pollution and causing great harm to the body of producers and users; it is easy to form bubbles between the film and the paper during film coating, so that the printed matter The surface is foggy, affecting the print's finish, clarity and color.
  • the pre-coating film coating technology can be said to be environmentally friendly technology or clean technology to achieve environmental protection, health protection and safe production.
  • pre-coated film has high production cost and strong dependence on equipment. For current domestic users, the high cost is still not acceptable to the public. Summary of the invention
  • the present invention is directed to solving at least some of the above technical problems or at least providing a useful commercial choice. Accordingly, it is an object of the present invention to provide a non-adhesive biaxially oriented polypropylene film for paper-plastic composite which has good bonding properties.
  • Another object of the present invention is to provide a process for preparing the non-gel biaxially oriented polypropylene film for paper-plastic composite.
  • a non-adhesive biaxially oriented polypropylene film for paper-plastic composite comprising an upper surface layer, an upper layer, a core layer, a lower layer and a functional layer which are sequentially disposed from top to bottom, wherein the functional layer is an anti-blocking agent
  • the ethylene-vinyl acetate copolymer has a content of the ethylene-vinyl acetate copolymer of from 90% to 97% based on the total weight of the functional layer.
  • the non-adhesive biaxially oriented polypropylene film for paper-plastic composite can be directly combined with a paper print, a package or a paper-plastic composite through a functional layer under heating and pressurization conditions. , the realization of the paper-plastic composite without gel. This not only eliminates the complicated glue coating process, but also has the environmental protection characteristics of the pre-coating film without pollution, and has high composite strength with the printing materials such as paper, stable quality, low price and high cost performance.
  • the rubber-free biaxially oriented polypropylene film for paper-plastic composite may further have the following additional technical features:
  • the ethylene-vinyl acetate copolymer has a vinyl acetate monomer content of 10% to 20% and a melt index of 2 to 10 g/g based on the total weight of the ethylene-vinyl acetate copolymer.
  • the lower layer is a metallocene linear low density polyethylene containing at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
  • the metallocene linear low density polyethylene is present in an amount of from 95% to 98% based on the total weight of the lower layer.
  • the upper surface layer is a matt polypropylene or an isotactic polypropylene containing an anti-blocking agent, a slip agent.
  • the content of the matt polypropylene or isotactic polypropylene is from 95% to 98% based on the total weight of the upper surface layer.
  • the upper layer and the core layer each contain 60%-100% of isotactic polypropylene.
  • the upper layer and the core layer are both made of content greater than 60% and less than 100% isotactic polypropylene is a mixture of at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
  • the paper-plastic composite rubber-free biaxially oriented polypropylene film has a total thickness of 17 ⁇ m - 21 ⁇ m, the functional layer has a thickness of 2.5 ⁇ m - 4.5 ⁇ m, and the upper surface layer has a thickness of 2.5 ⁇ -3.5 ⁇ .
  • the melt is filtered through a filter through a pipe, distributed to a die, and then cast into a thick sheet; 3) the slab is formed by transverse stretching and longitudinal stretching of the stretching device.
  • the film is subjected to corona treatment or flame treatment to form a mother roll, and the mother roll is subjected to aging treatment and slitting to form a finished product of the paper-plastic composite non-adhesive biaxially oriented polypropylene film.
  • the temperature of the extrusion apparatus and the die is controlled at 225 ° C - 265 ° C, and the casting slab temperature is controlled at 18 ° C - 50 ° C, the longitudinal direction
  • the stretching temperature is controlled at 80 ° C to 140 ° C and the longitudinal stretching ratio is 4.8-6;
  • the transverse stretching temperature is controlled at 150 ° C to 170 ° C and the transverse stretching ratio is 8 -9.5, surface treatment strength is 32-43 mN/m.
  • the method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention is not only simple to operate, environmentally friendly, and reduces manufacturing costs.
  • FIG. 1 is a schematic view showing the structure of a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing a method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention
  • first and second are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” and “second” may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, “multiple” means two or more unless otherwise stated.
  • BOPP biaxially oriented polypropylene film
  • the rubber-free biaxially oriented polypropylene film for paper-plastic composite comprises an upper surface layer 4, an upper layer 2, a core layer 1, a lower layer 3, and a functional layer 5 which are disposed in this order from top to bottom.
  • the upper surface layer 4 is a matt polypropylene or an isotactic polypropylene containing an anti-blocking agent and a slip agent, wherein the content of the matt polypropylene or the isotactic polypropylene is 95%-98. %.
  • Anti-blocking agents and slip agents can be used in the field of anti-blocking agents and slip agents.
  • the upper layer may contain 60% to 100% of isotactic polypropylene based on the total weight of the upper layer 2.
  • the upper layer 2 may further contain isotactic polypropylene and at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent, wherein, based on the total weight of the upper layer 2, isotactic polymerization
  • the content of propylene is more than 60% and less than 100%, and the balance is at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
  • the antistatic agent, the slip agent and the reinforcing agent contained in the upper layer 2 can be used in the field of antistatic agents, slip agents and reinforcing agents.
  • the core layer may contain from 60% to 100% of isotactic polypropylene based on the total weight of the core layer 1.
  • the core layer 1 may further contain isotactic polypropylene and at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent, wherein the isotactic polypropylene is based on the total weight of the core layer.
  • the content is more than 60% and less than 100%, and the balance is at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
  • the antistatic agent, the slip agent and the reinforcing agent contained in the core layer 1 may employ an antistatic agent, a slip agent and a reinforcing agent which are generally used in the art.
  • the lower layer 3 is connected to the functional layer 5 and above the functional layer 5.
  • the lower layer 3 is a metallocene linear low density polyethylene containing one or more of an antistatic agent, a slip agent and a reinforcing agent, wherein the metallocene linear low density polyethylene has a content of 95% to 98%.
  • Antistatic agents, slip agents and rigideners can be used in the field of antistatic agents, slip agents and Adding a new agent.
  • the functional layer 5 is an ethylene-vinyl acetate copolymer containing an anti-blocking agent, wherein the content of the ethylene-vinyl acetate copolymer is 90% to 97%. And the ethylene-vinyl acetate copolymer has a VA content of 10% to 20% and a melt index of 2 to 10 g/min.
  • the anti-blocking agent can be used in the field as a general-purpose anti-blocking agent.
  • the non-adhesive biaxially oriented polypropylene film for paper-plastic composite can be directly applied to the paper printing, the packaging box or the paper-plastic composite through the functional layer 5 under the condition of heating and pressing.
  • Composite the realization of the paper-plastic composite without gel. This not only eliminates the complicated glue coating process, but also has the environmental protection characteristics of the pre-coating film without pollution, and has high composite strength with the printing materials such as paper, stable quality, low price and high cost performance.
  • non-adhesive biaxially oriented polypropylene film for paper-plastic composite can be made into a bright or matt polypropylene film by using different materials on the upper surface layer 4, that is, when the upper surface layer 4 is used, etc.
  • the haze of the non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can reach ⁇ 3%, so that the surface brightness of the product after coating is higher; and when the upper surface layer is 4 ⁇ When the matt polypropylene is used, the haze of the rubber-free biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can be more than 70%, so that the coated article exhibits a soft and elegant appearance.
  • the total thickness of the rubber-free biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention is between 17 ⁇ -21 ⁇ , wherein the thickness of the functional layer is between 2.5 ⁇ -4.5 ⁇ , and the thickness of the upper surface layer is 2.5 ⁇ -3.5 ⁇ between.
  • niobium is the raw material (including the main raw material, the modified material, the additive masterbatch), B is the melt, and C is the thick sheet.
  • D is a film
  • E is a finished product
  • F is an extruder extrusion process
  • G is a die
  • a cast casting chiller is used for the melt forming process
  • H is a biaxial stretching process
  • I is an aging treatment
  • J is a minute. Cutting process.
  • the preparation method comprises the following steps:
  • the screened raw material A is pre-mixed according to the formula design, and after being stirred, it is sent to the measuring silo of the extrusion equipment through the feeding system, and the pre-mixed material is metered and then injected into the extrusion equipment through the extruder.
  • the extrusion process F is plasticized, and the plasticization is sufficient to form a uniformly melted melt B.
  • the melt B is piped to a filtering device for filtration, and then piped to a die for forming, through a die, casting and casting.
  • the sheet chilling device forms a slab C for the melt forming step G; again, the slab C is subjected to the biaxial stretching process H to form the film D; finally, the thickness of the film D after stretching is detected and controlled by an on-line automatic thickness measuring device.
  • the film D is treated by corona or flame to increase the surface tension, and then the processed film D is wound into a parent roll, the mother roll is subjected to the aging treatment I, and finally the finished product E is formed by the slitting process J.
  • the process conditions used in the present invention include: The temperature of the extrusion apparatus and the die is controlled at 225 ° C - 265 ° C, and the temperature of the cast slab is controlled at 18 ° C - 50 ° C. According to the configuration of the equipment, two-step stretching or synchronous stretching is used, and biaxial stretching equipment is usually used.
  • the stretching method is a two-step stretching process of longitudinal stretching and transverse stretching.
  • the longitudinal stretching temperature is controlled at 80 ° C to 140 ° C and the longitudinal stretching ratio is 4.8-6; the transverse stretching temperature is controlled at 150 ° C to 170 ° C and the transverse stretching ratio is 8 to 9.5.
  • the surface treatment strength is 32-43 mN/m.
  • Example 1 A rubber-free biaxially oriented polypropylene film having a width of 8 m was exemplified and described in detail.
  • the anti-blocking agent can be a universal type, such as Shulman ABPP05.
  • Both the upper layer 2 and the core layer 1 are 93%-97.5% isotactic polypropylene plus 2.5%-7% antistatic agent.
  • Antistatic agent ⁇ can be used for versatility, such as Shulman ASPA2485 or domestic AY088.
  • the lower layer 3 is 95% to 98% metallocene linear low density polyethylene plus 2% to 5% antistatic agent.
  • the upper surface layer 4 is 95%-98% matt polypropylene (matte material) plus 2%-5% anti-blocking agent; the matting material is universal type, such as: Foshan Plastic M973, anti-blocking agent is general-purpose type Can be, such as: Shulman ABPP05.
  • the prepared product has a thickness of 20 ⁇ m, wherein the functional layer 5 has a thickness of 4 ⁇ m and the upper surface layer 4 has a thickness of 3 ⁇ m.
  • the conditions used in the preparation process include:
  • the German BRUCKNER two-step stretched polypropylene film production line is used.
  • the temperature of the extruder and the die is 225 ⁇ 265 °C
  • the temperature of the cast slab is 30 °C
  • the temperature of the longitudinal drawing unit is 80.
  • ⁇ 140 ° C the longitudinal stretching ratio is 5
  • the temperature of the transverse stretching unit is controlled at 150 ⁇ 170 ° C
  • the transverse stretching ratio is 9.
  • the corona treatment power is 25w. min/m2.
  • the properties of the prepared products are as follows:
  • Thickness 20um
  • Example 2 A rubber-free biaxially oriented polypropylene film having a width of 8 m was taken as an example for detailed description. As shown in Figure 1, the functional layer 5 is 96% ethylene-vinyl acetate copolymer (EVA) plus 4% anti-blocking agent;
  • EVA ethylene-vinyl acetate copolymer
  • Yanshan Petrochemical and DuPont are available.
  • the anti-blocking agent is a general-purpose type, such as: Shulman ABPP05.
  • Both the upper layer 2 and the core layer 1 are 95% isotactic polypropylene plus 5% antistatic agent, and the antistatic agent can be used universally, such as Shulman ASPA2485.
  • the lower layer 3 is 96% metallocene linear low density polyethylene plus 4% antistatic agent.
  • the upper surface layer 4 is 95% isotactic polypropylene plus 5% anti-blocking agent.
  • the thickness of the prepared product was 18 ⁇ m, and the thickness of the functional layer 5 was 3 ⁇ m; the thickness of the upper surface layer 4 was 3 ⁇ m.
  • the conditions used in the preparation method and the preparation process of the present embodiment are as in Example 1, and are not described herein again.
  • the properties of the prepared products are as follows:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A biaxially stretched polypropylene film without adhesive agent for lamination to paper and the preparation method thereof. Said biaxially stretched polypropylene film without adhesive agent for lamination to paper comprises an upper surface layer (4), an upper layer (2), a core layer (1), a lower layer (3) and a functional layer (5), from top to bottom, wherein the functional layer (5) is an ethylene-vinyl acetate copolymer containing anti-blocking agents. The content of the ethylene-vinyl acetate copolymer is 90%-97%, based on the total weight of the functional layer (5).

Description

纸塑复合用无胶双向拉伸聚丙烯薄膜及其制备方法  Rubber-free biaxially oriented polypropylene film for paper-plastic composite and preparation method thereof
技术领域 Technical field
本发明涉及一种纸塑复合用无胶双向拉伸聚丙烯薄膜及其制备方法。 背景技术  The invention relates to a glueless biaxially oriented polypropylene film for paper-plastic composite and a preparation method thereof. Background technique
印刷品覆膜是印后加工的重要手段， 它决定印刷产品的最终身价。 印刷品的覆膜工 艺是指用塑料薄膜覆盖在纸张印刷品上面， 中间使用粘合剂， 通过加热加压处理后， 使 塑料薄膜和纸张两种不同性质的物质粘合在一起， 形成纸 /塑合一的表面装饰加工技术。 它对印刷品起保护和装饰作用， 被广泛应用于包装印刷领域， 如书刊封面、 宣传画册、 地图、 广告礼品袋、 高级包装盒等的表面加工上。 当前覆膜技术可大致分为即涂膜和预 涂膜两种。  Print film is an important means of post-press processing, which determines the final value of the printed product. The film coating process of the printed matter refers to covering the paper printed matter with a plastic film, and using an adhesive in the middle, after heat and pressure treatment, the two different properties of the plastic film and the paper are bonded together to form a paper/plastic combination. A surface decoration processing technology. It protects and decorates prints and is widely used in the field of packaging and printing, such as book covers, brochures, maps, advertising gift bags, and advanced packaging boxes. Current coating technology can be broadly divided into instant coating and pre-coated.
即涂膜技术是国际六十年代兴起的对印刷品、 包装品的印后覆膜工艺。 但该技术在 覆膜过程中直接使用含苯溶剂，造成了空气污染并给生产者和使用者的身体带来极大危 害； 覆膜时极易在膜和纸张之间形成气泡， 使印品表面呈雾状， 影响印品的光洁度、 清 晰度及色彩鲜艳度。  That is, the film coating technology is the post-printing process for printed matter and packaging products that emerged in the 1960s. However, this technology directly uses benzene-containing solvents in the laminating process, causing air pollution and causing great harm to the body of producers and users; it is easy to form bubbles between the film and the paper during film coating, so that the printed matter The surface is foggy, affecting the print's finish, clarity and color.
预涂膜覆膜技术可以说是环境友好技术或清洁技术， 实现了保护环境、 保护健康、 安全生产。 但预涂膜生产成本较高， 对设备的依赖性较强。 对当前的国内使用商而言， 由于其居高不下的成本仍然不能被大众所接受。 发明内容  The pre-coating film coating technology can be said to be environmentally friendly technology or clean technology to achieve environmental protection, health protection and safe production. However, pre-coated film has high production cost and strong dependence on equipment. For current domestic users, the high cost is still not acceptable to the public. Summary of the invention
本发明旨在至少在一定程度上解决上述技术问题之一或至少提供一种有用的商业 选择。 为此， 本发明的一个目的在于提出一种具有粘接性能良好的纸塑复合用无胶双向 拉伸聚丙烯薄膜。  The present invention is directed to solving at least some of the above technical problems or at least providing a useful commercial choice. Accordingly, it is an object of the present invention to provide a non-adhesive biaxially oriented polypropylene film for paper-plastic composite which has good bonding properties.
本发明的另一个目的在于提出一种制备该纸塑复合用无胶双向拉伸聚丙烯薄膜的 制备方法。  Another object of the present invention is to provide a process for preparing the non-gel biaxially oriented polypropylene film for paper-plastic composite.
根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜， 包括自上而下依次设置 的上表层、 上层、 芯层、 下层和功能层， 其中所述功能层为含有抗粘连剂的乙烯 -醋酸 乙烯酯共聚物， 基于所述功能层的总重量， 所述乙烯-醋酸乙烯酯共聚物的含量为 90%-97%。  A non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention, comprising an upper surface layer, an upper layer, a core layer, a lower layer and a functional layer which are sequentially disposed from top to bottom, wherein the functional layer is an anti-blocking agent The ethylene-vinyl acetate copolymer has a content of the ethylene-vinyl acetate copolymer of from 90% to 97% based on the total weight of the functional layer.
由此， 根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜， 通过功能层可在 加热加压的条件下与纸质印品、 包装盒或是纸塑合成品等直接复合， 实现了纸塑复合的 无胶化。 这样既省去了繁杂的涂胶工艺， 又兼具预涂膜无污染的环保特性， 并且与纸材 等印品的复合强度高， 质量稳定， 价格低廉， 性价比高。  Thus, the non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can be directly combined with a paper print, a package or a paper-plastic composite through a functional layer under heating and pressurization conditions. , the realization of the paper-plastic composite without gel. This not only eliminates the complicated glue coating process, but also has the environmental protection characteristics of the pre-coating film without pollution, and has high composite strength with the printing materials such as paper, stable quality, low price and high cost performance.
另外， 根据本发明上述实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜还可以具有如 下附加的技术特征： 根据本发明的一个实施例， 基于所述乙烯-醋酸乙烯酯共聚物的总重量， 乙烯 -醋酸 乙烯酯共聚物的醋酸乙烯酯单体的含量为 10%-20%, 熔融指数 2-10g/min。 根据本发明 的一个实施例， 所述下层为含有选自抗静电剂、 爽滑剂、 增刚剂至少之一的茂金属线性 低密度聚乙烯。 Further, the rubber-free biaxially oriented polypropylene film for paper-plastic composite according to the above embodiment of the present invention may further have the following additional technical features: According to an embodiment of the present invention, the ethylene-vinyl acetate copolymer has a vinyl acetate monomer content of 10% to 20% and a melt index of 2 to 10 g/g based on the total weight of the ethylene-vinyl acetate copolymer. Min. According to an embodiment of the present invention, the lower layer is a metallocene linear low density polyethylene containing at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
根据本发明的一个实施例， 基于所述下层的总重量， 所述茂金属线性低密度聚乙烯 的含量为 95%-98%。  According to an embodiment of the present invention, the metallocene linear low density polyethylene is present in an amount of from 95% to 98% based on the total weight of the lower layer.
根据本发明的一个实施例， 所述上表层为含有抗粘连剂、 爽滑剂的亚光聚丙烯或等 规聚丙烯。  According to an embodiment of the present invention, the upper surface layer is a matt polypropylene or an isotactic polypropylene containing an anti-blocking agent, a slip agent.
根据本发明的一个实施例， 基于所述上表层的总重量， 所述亚光聚丙烯或等规聚丙 烯的含量为 95%-98%。  According to an embodiment of the present invention, the content of the matt polypropylene or isotactic polypropylene is from 95% to 98% based on the total weight of the upper surface layer.
根据本发明的一个实施例， 所述上层、 芯层均为含有 60%-100%的等规聚丙烯 根据本发明的一个实施例， 所述上层、 芯层均为由含量大于 60%且小于 100%的等 规聚丙烯与选自抗静电剂、 爽滑剂、 增刚剂至少之一所组成的混合物。  According to an embodiment of the present invention, the upper layer and the core layer each contain 60%-100% of isotactic polypropylene. According to an embodiment of the present invention, the upper layer and the core layer are both made of content greater than 60% and less than 100% isotactic polypropylene is a mixture of at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent.
根据本发明的一个实施例， 所述纸塑复合用无胶双向拉伸聚丙烯薄膜的总厚度为 17μηι -21μηι, 所述功能层的厚度为 2.5μηι -4.5μηι, 所述上表层的厚度为 2.5μηι -3.5μηι。  According to an embodiment of the present invention, the paper-plastic composite rubber-free biaxially oriented polypropylene film has a total thickness of 17 μm - 21 μm, the functional layer has a thickness of 2.5 μm - 4.5 μm, and the upper surface layer has a thickness of 2.5μηι -3.5μηι.
根据本发明另一方面实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的制备方法， 包 括如下步骤：  A method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to another embodiment of the present invention comprises the following steps:
1 ) 将预制备的原料送入挤出设备的不同层对应的料斗内后塑化成熔体；  1) feeding the pre-prepared raw materials into a corresponding hopper of different layers of the extrusion equipment and plasticizing into a melt;
2 ) 所述熔体通过管道经过滤器过滤后分配到模头成型， 再经流延铸片生成厚片； 3 ) 所述厚片经拉伸装置的横向拉伸和纵向拉伸处理后制成薄膜；  2) the melt is filtered through a filter through a pipe, distributed to a die, and then cast into a thick sheet; 3) the slab is formed by transverse stretching and longitudinal stretching of the stretching device. Film
4 ) 所述薄膜经电暈处理或火焰处理后形成母卷， 所述母卷再经时效处理和分切后 制成所述纸塑复合用无胶双向拉伸聚丙烯薄膜成品。  4) The film is subjected to corona treatment or flame treatment to form a mother roll, and the mother roll is subjected to aging treatment and slitting to form a finished product of the paper-plastic composite non-adhesive biaxially oriented polypropylene film.
根据本发明的一个实施例， 所述挤出设备和所述模头的温度控制在 225 °C -265 °C , 所述流延铸片温度控制在 18 °C -50 °C , 所述纵向拉伸的温度控制在 80°C -140 °C且所述纵 向拉伸倍率为 4.8-6; 所述横向拉伸的温度控制在 150°C -170 °C且所述横向拉伸倍率为 8-9.5 , 表面处理强度为 32-43 mN/m。  According to an embodiment of the present invention, the temperature of the extrusion apparatus and the die is controlled at 225 ° C - 265 ° C, and the casting slab temperature is controlled at 18 ° C - 50 ° C, the longitudinal direction The stretching temperature is controlled at 80 ° C to 140 ° C and the longitudinal stretching ratio is 4.8-6; the transverse stretching temperature is controlled at 150 ° C to 170 ° C and the transverse stretching ratio is 8 -9.5, surface treatment strength is 32-43 mN/m.
由此， 根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的制备方法不仅操 作简单， 环保且降低了制造成本。  Thus, the method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention is not only simple to operate, environmentally friendly, and reduces manufacturing costs.
本发明的附加方面和优点将在下面的描述中部分给出， 部分将从下面的描述中变得 明显， 或通过本发明的实践了解到。 附图说明  The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS
本发明的上述和 /或附加的方面和优点从结合下面附图对实施例的描述中将变得明 显和容易理解， 其中：  The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from
图 1是根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜结构示意图； 图 2是根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的制备方法的示意 具体实施方式 1 is a schematic view showing the structure of a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention; FIG. 2 is a schematic view showing a method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention; detailed description
下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其中自始至终相 图描述的实施例是示例性的， 仅用于解释本发明， 而不能理解为对本发明的限制。  The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the accompanying drawings, wherein the embodiments described in the drawings are intended to be illustrative only and not to limit the invention. .
在本发明的描述中， 需要理解的是， 术语 "中心" 、 "上" 、 "下" 、 "前" 、 "后" 、 "左" 、 "右" 、 "竖直" 、 "水平" 、 "顶" 、 "底" "内" 、 "外" 等指示的方位 或位置关系为基于附图所示的方位或位置关系， 仅是为了便于描述本发明和简化描述， 而不是指示或暗示所指的装置或元件必须具有特定的方位、 以特定的方位构造和操作， 因此不能理解为对本发明的限制。  In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", The orientation or positional relationship of the "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or component referred to has a particular orientation, is constructed and operated in a particular orientation and is therefore not to be construed as limiting the invention.
需要说明的是， 术语 "第一" 、 "第二" 仅用于描述目的， 而不能理解为指示或暗 示相对重要性或者隐含指明所指示的技术特征的数量。 由此， 限定有 "第一" 、 "第二" 的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地，在本发明的描述中， 除非另有说明， "多个" 的含义是两个或两个以上。  It should be noted that the terms "first" and "second" are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, "multiple" means two or more unless otherwise stated.
除非特别说明， 本发明描述中的百分比代表质量百分比。  The percentages in the description of the invention represent percentages by mass unless otherwise stated.
下面参考图 1 来描述根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜 ( BOPP ) 。  A non-adhesive biaxially oriented polypropylene film (BOPP) for paper-plastic composite according to an embodiment of the present invention will be described below with reference to FIG.
根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜包括自上而下依次设置 的上表层 4、 上层 2、 芯层 1、 下层 3和功能层 5。  The rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention comprises an upper surface layer 4, an upper layer 2, a core layer 1, a lower layer 3, and a functional layer 5 which are disposed in this order from top to bottom.
如图 1所示， 具体而言， 上表层 4为含有抗粘连剂、 爽滑剂的亚光聚丙烯或等规聚 丙烯， 其中亚光聚丙烯或等规聚丙烯的含量为 95%-98%。 抗粘连剂和爽滑剂可以釆用 本领域通用型抗粘连剂和爽滑剂。  As shown in FIG. 1 , specifically, the upper surface layer 4 is a matt polypropylene or an isotactic polypropylene containing an anti-blocking agent and a slip agent, wherein the content of the matt polypropylene or the isotactic polypropylene is 95%-98. %. Anti-blocking agents and slip agents can be used in the field of anti-blocking agents and slip agents.
基于上层 2的总重量， 上层可以含有 60%-100%的等规聚丙烯。  The upper layer may contain 60% to 100% of isotactic polypropylene based on the total weight of the upper layer 2.
另外， 根据本发明的另一实施例， 上层 2还可以含有等规聚丙烯和选自抗静电剂、 爽滑剂、 增刚剂至少之一， 其中， 基于上层 2的总重量， 等规聚丙烯的含量为大于 60% 且小于 100% , 其余为选自抗静电剂、 爽滑剂、 增刚剂至少之一。 上层 2所含有的抗静 电剂、 爽滑剂和增刚剂可以釆用本领域通用型抗静电剂、 爽滑剂和增刚剂。  In addition, according to another embodiment of the present invention, the upper layer 2 may further contain isotactic polypropylene and at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent, wherein, based on the total weight of the upper layer 2, isotactic polymerization The content of propylene is more than 60% and less than 100%, and the balance is at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent. The antistatic agent, the slip agent and the reinforcing agent contained in the upper layer 2 can be used in the field of antistatic agents, slip agents and reinforcing agents.
同样地， 基于芯层 1的总重量， 芯层可以含有 60%-100%的等规聚丙烯。  Likewise, the core layer may contain from 60% to 100% of isotactic polypropylene based on the total weight of the core layer 1.
根据本发明的另一实施例，芯层 1还可以含有等规聚丙烯和选自抗静电剂、爽滑剂、 增刚剂至少之一，其中，基于芯层的总重量，等规聚丙烯的含量为大于 60%且小于 100% , 其余为选自抗静电剂、 爽滑剂、 增刚剂至少之一。 芯层 1所含有的抗静电剂、 爽滑剂和 增刚剂可以釆用本领域通用型抗静电剂、 爽滑剂和增刚剂。  According to another embodiment of the present invention, the core layer 1 may further contain isotactic polypropylene and at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent, wherein the isotactic polypropylene is based on the total weight of the core layer. The content is more than 60% and less than 100%, and the balance is at least one selected from the group consisting of an antistatic agent, a slip agent, and a reinforcing agent. The antistatic agent, the slip agent and the reinforcing agent contained in the core layer 1 may employ an antistatic agent, a slip agent and a reinforcing agent which are generally used in the art.
下层 3与功能层 5相连且位于功能层 5上方。 下层 3为含有抗静电剂、 爽滑剂、 增 刚剂之中一种或几种的茂金属线性低密度聚乙烯，其中茂金属线性低密度聚乙烯的含量 为 95%-98%。 抗静电剂、 爽滑剂和增刚剂可以釆用本领域通用型抗静电剂、 爽滑剂和 增刚剂。 The lower layer 3 is connected to the functional layer 5 and above the functional layer 5. The lower layer 3 is a metallocene linear low density polyethylene containing one or more of an antistatic agent, a slip agent and a reinforcing agent, wherein the metallocene linear low density polyethylene has a content of 95% to 98%. Antistatic agents, slip agents and rigideners can be used in the field of antistatic agents, slip agents and Adding a new agent.
最后， 作为与纸质或是纸塑合成印刷品直接接触的层， 功能层 5为含有抗粘连剂的 乙烯-醋酸乙烯酯共聚物， 其中乙烯-醋酸乙烯酯共聚物的含量为 90%-97% , 并且乙烯- 醋酸乙烯酯共聚物中的 VA含量为 10%-20% , 熔融指数 2-10g/min。 抗粘连剂可以釆用 本领域通用型抗粘连剂。  Finally, as a layer in direct contact with a paper or paper-plastic synthetic print, the functional layer 5 is an ethylene-vinyl acetate copolymer containing an anti-blocking agent, wherein the content of the ethylene-vinyl acetate copolymer is 90% to 97%. And the ethylene-vinyl acetate copolymer has a VA content of 10% to 20% and a melt index of 2 to 10 g/min. The anti-blocking agent can be used in the field as a general-purpose anti-blocking agent.
由此， 根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜， 通过功能层 5可 在加热加压的条件下与纸质印品、 包装盒或是纸塑合成品等直接复合， 实现了纸塑复合 的无胶化。 这样既省去了繁杂的涂胶工艺， 又兼具预涂膜无污染的环保特性， 并且与纸 材等印品的复合强度高， 质量稳定， 价格低廉， 性价比高。  Thus, the non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can be directly applied to the paper printing, the packaging box or the paper-plastic composite through the functional layer 5 under the condition of heating and pressing. Composite, the realization of the paper-plastic composite without gel. This not only eliminates the complicated glue coating process, but also has the environmental protection characteristics of the pre-coating film without pollution, and has high composite strength with the printing materials such as paper, stable quality, low price and high cost performance.
另外， 根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜， 通过上表层 4釆 用不同材质可做成亮光或亚光两种聚丙烯薄膜， 即当上表层 4釆用等规聚丙烯时，根据 本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜亮光的雾度可以达到 < 3% , 使覆 膜后的产品表面亮度更高； 而当上表层 4釆用亚光聚丙烯时，根据本发明实施例的纸塑 复合用无胶双向拉伸聚丙烯薄膜的雾度可以达 70%以上，使被覆品呈现出柔和典雅的外 观效果。  In addition, the non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can be made into a bright or matt polypropylene film by using different materials on the upper surface layer 4, that is, when the upper surface layer 4 is used, etc. When the polypropylene is used, the haze of the non-adhesive biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can reach <3%, so that the surface brightness of the product after coating is higher; and when the upper surface layer is 4釆When the matt polypropylene is used, the haze of the rubber-free biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention can be more than 70%, so that the coated article exhibits a soft and elegant appearance.
根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的总厚度在 17μηι -21 μηι 之间， 其中功能层的厚度在 2.5μηι -4.5μηι之间， 上表层的厚度在 2.5μηι -3.5 μηι之间。  The total thickness of the rubber-free biaxially oriented polypropylene film for paper-plastic composite according to the embodiment of the present invention is between 17μηι -21 μηι, wherein the thickness of the functional layer is between 2.5μηι -4.5μηι, and the thickness of the upper surface layer is 2.5μηι -3.5 μηι between.
下面参考图 2来描述根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的制 备方法。  Next, a method of preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention will be described with reference to FIG.
图 2中， Α为原料（包括主原料、 改性料、 添加剂母料） ， B为熔体， C为厚片， In Figure 2, niobium is the raw material (including the main raw material, the modified material, the additive masterbatch), B is the melt, and C is the thick sheet.
D为薄膜， E为成品， F为挤出机挤出工序， G为模头、 流延铸片激冷装置对熔体成型 工序， H为双向拉伸工序， I为时效处理、 J为分切工序。 D is a film, E is a finished product, F is an extruder extrusion process, G is a die, a cast casting chiller is used for the melt forming process, H is a biaxial stretching process, I is an aging treatment, and J is a minute. Cutting process.
具体而言该制备方法包括如下步骤：  Specifically, the preparation method comprises the following steps:
首先， 经过筛选的原料 A按照配方设计进行预混合， 搅拌均勾后， 经过送料系统送 到挤出设备的计量料仓中，预混料经过计量后加注到挤出设备中通过挤出机挤出工序 F 进行塑化， 塑化充分且形成均勾的熔体 B; 其次， 熔体 B通过管道输送到过滤装置进行 过滤， 再经过管道输送到模头成型， 通过模头、 流延铸片激冷装置对熔体成型工序 G 生成厚片 C; 再次， 厚片 C经过双向拉伸工序 H生成薄膜 D; 最后， 拉伸后薄膜 D的 厚度釆用在线自动测厚装置检测和控制， 薄膜 D 经电暈或火焰处理以提高表面张力， 然后将处理后的薄膜 D收卷成母卷， 母卷经过时效 I处理后， 最后通过分切工序 J制成 成品 E。  First, the screened raw material A is pre-mixed according to the formula design, and after being stirred, it is sent to the measuring silo of the extrusion equipment through the feeding system, and the pre-mixed material is metered and then injected into the extrusion equipment through the extruder. The extrusion process F is plasticized, and the plasticization is sufficient to form a uniformly melted melt B. Secondly, the melt B is piped to a filtering device for filtration, and then piped to a die for forming, through a die, casting and casting. The sheet chilling device forms a slab C for the melt forming step G; again, the slab C is subjected to the biaxial stretching process H to form the film D; finally, the thickness of the film D after stretching is detected and controlled by an on-line automatic thickness measuring device. The film D is treated by corona or flame to increase the surface tension, and then the processed film D is wound into a parent roll, the mother roll is subjected to the aging treatment I, and finally the finished product E is formed by the slitting process J.
本发明所使用的工艺条件包括： 挤出设备和模头的温度控制在 225 °C -265 °C , 流延 铸片的温度控制在 18 °C -50 °C。 根据设备配置情况， 选用两步拉伸或同步拉伸， 通常选 用双向拉伸设备， 拉伸方式为先纵向拉伸再横向拉伸的两步拉伸工序。纵向拉伸的温度 控制在 80 °C - 140 °C且纵向拉伸倍率为 4.8-6;横向拉伸的温度控制在 150 °C -170 °C且所述 横向拉伸倍率为 8-9.5。 表面处理强度为 32-43mN/m。 由此， 根据本发明实施例的纸塑复合用无胶双向拉伸聚丙烯薄膜的制备方法不仅操 作简单， 环保且降低了制造成本。 实施例 1 : 以宽度为 8米的无胶双向拉伸聚丙烯薄膜制造为例， 进行详细说明。 如图 1所示， 功能层 5为 90%-97%乙烯 -醋酸乙烯酯共聚物 （EVA ) 加 3-10%的抗 粘连剂； EVA的 VA含量 18%, 熔融指数 MI=3 g/10min, 燕山石化、 杜邦等均有供应。 抗粘连剂为通用型即可， 例如舒尔曼 ABPP05。 The process conditions used in the present invention include: The temperature of the extrusion apparatus and the die is controlled at 225 ° C - 265 ° C, and the temperature of the cast slab is controlled at 18 ° C - 50 ° C. According to the configuration of the equipment, two-step stretching or synchronous stretching is used, and biaxial stretching equipment is usually used. The stretching method is a two-step stretching process of longitudinal stretching and transverse stretching. The longitudinal stretching temperature is controlled at 80 ° C to 140 ° C and the longitudinal stretching ratio is 4.8-6; the transverse stretching temperature is controlled at 150 ° C to 170 ° C and the transverse stretching ratio is 8 to 9.5. The surface treatment strength is 32-43 mN/m. Thus, the method for preparing a rubber-free biaxially oriented polypropylene film for paper-plastic composite according to an embodiment of the present invention is not only simple in operation, environmentally friendly, and reduces manufacturing costs. Example 1: A rubber-free biaxially oriented polypropylene film having a width of 8 m was exemplified and described in detail. As shown in Fig. 1, the functional layer 5 is 90%-97% ethylene-vinyl acetate copolymer (EVA) plus 3-10% anti-blocking agent; EVA has a VA content of 18%, and the melt index MI=3 g/10min Yanshan Petrochemical, DuPont, etc. are available. The anti-blocking agent can be a universal type, such as Shulman ABPP05.
上层 2与与芯层 1均为 93%-97.5%等规聚丙烯加 2.5%-7%的抗静电剂。 抗静电剂釆 用通用性即可， 例如舒尔曼 ASPA2485或国产 AY088。  Both the upper layer 2 and the core layer 1 are 93%-97.5% isotactic polypropylene plus 2.5%-7% antistatic agent. Antistatic agent 釆 can be used for versatility, such as Shulman ASPA2485 or domestic AY088.
下层 3为 95%-98%的茂金属线性低密度聚乙烯加 2%-5%的抗静电剂。  The lower layer 3 is 95% to 98% metallocene linear low density polyethylene plus 2% to 5% antistatic agent.
上表层 4为 95%-98%的亚光聚丙烯 （亚光料） 加 2%-5%抗粘连剂； 消光料为通用 型即可，如:佛山塑兴 M973 , 抗粘连剂为通用型即可， 如:舒尔曼 ABPP05。  The upper surface layer 4 is 95%-98% matt polypropylene (matte material) plus 2%-5% anti-blocking agent; the matting material is universal type, such as: Foshan Plastic M973, anti-blocking agent is general-purpose type Can be, such as: Shulman ABPP05.
所制备产品厚度为 20微米， 其中功能层 5厚度为 4微米， 上表层 4的厚度为 3微 米。  The prepared product has a thickness of 20 μm, wherein the functional layer 5 has a thickness of 4 μm and the upper surface layer 4 has a thickness of 3 μm.
制备方法如上文所述， 制备工艺所釆用的条件包括：  Preparation Methods As described above, the conditions used in the preparation process include:
该实施例釆用德国 BRUCKNER两步拉伸聚丙烯薄膜生产线， 挤出机、 模头的温度 为 225 ~ 265 °C , 流延铸片温度在 30°C ; 纵向拉伸单元的温度为在 80 ~ 140°C , 纵向拉 伸倍率为 5; 横向拉伸单元的温度控制在 150 ~ 170°C , 横向拉伸倍率为 9。 电暈处理功 率为 25w. min/m2 。  In this embodiment, the German BRUCKNER two-step stretched polypropylene film production line is used. The temperature of the extruder and the die is 225 ~ 265 °C, the temperature of the cast slab is 30 °C, and the temperature of the longitudinal drawing unit is 80. ~ 140 ° C, the longitudinal stretching ratio is 5; the temperature of the transverse stretching unit is controlled at 150 ~ 170 ° C, and the transverse stretching ratio is 9. The corona treatment power is 25w. min/m2.
所制备的产品性能如下：  The properties of the prepared products are as follows:
厚度 ： 20um  Thickness : 20um
密度 ： 0.83-0.91g/cm3  Density : 0.83-0.91g/cm3
拉伸强度 （纵向 /横向） ： 110 MPa ~ 220 MPa  Tensile strength (longitudinal / transverse): 110 MPa ~ 220 MPa
热封强度： > 4.5 N/15mm  Heat seal strength: > 4.5 N/15mm
雾度： > 70%  Haze: > 70%
热收缩 （纵向 /横向） ： 5.0%-2.0%  Heat shrinkage (longitudinal / lateral): 5.0%-2.0%
表面张力： 40 mN/m。 实施例 2: 以宽度为 8米的无胶双向拉伸聚丙烯薄膜制造为例， 进行详细说明。 如图 1所示， 功能层 5为 96%乙烯 -醋酸乙烯酯共聚物 （ EVA ) 加 4%的抗粘连剂； Surface tension: 40 mN/m. Example 2: A rubber-free biaxially oriented polypropylene film having a width of 8 m was taken as an example for detailed description. As shown in Figure 1, the functional layer 5 is 96% ethylene-vinyl acetate copolymer (EVA) plus 4% anti-blocking agent;
EVA的 VA含量 18%, 熔融指数 MI=3 g/10min, 燕山石化、 杜邦均有供应。 抗粘连剂 为通用型即可， 如:舒尔曼 ABPP05。 EVA has a VA content of 18% and a melt index of MI=3 g/10min. Yanshan Petrochemical and DuPont are available. The anti-blocking agent is a general-purpose type, such as: Shulman ABPP05.
上层 2与与芯层 1均为 95%等规聚丙烯加 5%抗静电剂， 抗静电剂通用性即可， 如 舒尔曼 ASPA2485。  Both the upper layer 2 and the core layer 1 are 95% isotactic polypropylene plus 5% antistatic agent, and the antistatic agent can be used universally, such as Shulman ASPA2485.
下层 3为 96%的茂金属线性低密度聚乙烯加 4%的抗静电剂。  The lower layer 3 is 96% metallocene linear low density polyethylene plus 4% antistatic agent.
上表层 4 为 95%的等规聚丙烯加 5%抗粘连剂。 所制备产品厚度为 18微米， 功能层 5的厚度 3微米； 上表层 4的厚度 3微米。 本实施例的制备方法和制备工艺所釆用的条件如实施例 1 , 在此不再赘述。 The upper surface layer 4 is 95% isotactic polypropylene plus 5% anti-blocking agent. The thickness of the prepared product was 18 μm, and the thickness of the functional layer 5 was 3 μm; the thickness of the upper surface layer 4 was 3 μm. The conditions used in the preparation method and the preparation process of the present embodiment are as in Example 1, and are not described herein again.
所制备的产品性能如下：  The properties of the prepared products are as follows:
厚度 ： 18  Thickness : 18
密度 ： 0.91 g/cm3  Density : 0.91 g/cm3
拉伸强度 （纵向 /横向） ： 1 10 MPa ~ 200 MPa  Tensile strength (longitudinal / transverse): 1 10 MPa ~ 200 MPa
热封强度： > 4.5 N/15mm  Heat seal strength: > 4.5 N/15mm
雾度： 2.5%  Haze: 2.5%
热收缩 （纵向 /横向） ： 5.0%-2.0%  Heat shrinkage (longitudinal / lateral): 5.0%-2.0%
表面张力： 40 mN/m。  Surface tension: 40 mN/m.
在本说明书的描述中， 参考术语 "一个实施例"、 "一些实施例"、 "示意性实施例"、 "示 例"、 "具体示例"、 或 "一些示例" 等的描述意指结合该实施例或示例描述的具体特征、 结 构、 材料或者特点包含于本发明的至少一个实施例或示例中。 在本说明书中， 对上述术语 的示意性表述不一定指的是相同的实施例或示例。 而且， 描述的具体特征、 结构、 材料或 者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。  In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本 发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型， 本发明 的范围由权利要求及其等同物限定。  While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

权利要求书 claims
1、 一种纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 包括自上而下依次设置的 上表层、 上层、 芯层、 下层和功能层， 其中所述功能层为含有抗粘连剂的乙烯 -醋酸乙烯酯 共聚物， 基于所述功能层的总重量， 所述乙烯-醋酸乙烯酯共聚物的含量为 90%-97%。 1. A glue-free biaxially oriented polypropylene film for paper-plastic composites, which is characterized in that it includes an upper surface layer, an upper layer, a core layer, a lower layer and a functional layer arranged in sequence from top to bottom, wherein the functional layer contains anti- The adhesive agent is an ethylene-vinyl acetate copolymer. Based on the total weight of the functional layer, the content of the ethylene-vinyl acetate copolymer is 90%-97%.
2、 根据权利要求 1所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 基于所 述功能层乙烯-醋酸乙烯酯共聚物的总重量， 乙烯-醋酸乙烯酯共聚物的醋酸乙烯酯单体的含 量为 10%-20%, 熔融指数 2-10g/min。 2. The glueless biaxially oriented polypropylene film for paper-plastic composite according to claim 1, characterized in that, based on the total weight of the functional layer ethylene-vinyl acetate copolymer, The content of vinyl acetate monomer is 10%-20%, and the melt index is 2-10g/min.
3、根据权利要求 1所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于，所述下层 为含有选自抗静电剂、 爽滑剂、 增刚剂至少之一的茂金属线性低密度聚乙烯。 3. The glue-free biaxially oriented polypropylene film for paper-plastic composite according to claim 1, characterized in that the lower layer is a metallocene containing at least one selected from the group consisting of antistatic agents, slip agents and stiffening agents. Linear low density polyethylene.
4、 根据权利要求 3所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 基于所 述下层的总重量， 所述茂金属线性低密度聚乙烯的含量为 95%-98%。 4. The glue-free biaxially oriented polypropylene film for paper-plastic composite according to claim 3, characterized in that, based on the total weight of the lower layer, the content of the metallocene linear low-density polyethylene is 95%-98 %.
5、 根据权利要求 1所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 所述上 表层为含有抗粘连剂、 爽滑剂的亚光聚丙烯或等规聚丙烯。 5. The glueless biaxially oriented polypropylene film for paper-plastic composite according to claim 1, characterized in that the upper surface layer is matte polypropylene or isotactic polypropylene containing an anti-adhesive agent and a slip agent.
6、 根据权利要求 5所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 基于所 述上表层的总重量， 所述亚光聚丙烯或等规聚丙烯的含量为 95%-98%。 6. The glue-free biaxially oriented polypropylene film for paper-plastic composite according to claim 5, characterized in that, based on the total weight of the upper surface layer, the content of the matte polypropylene or isotactic polypropylene is 95 %-98%.
7、 根据权利要求 1所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 所述上 层、 芯层均为含有 60%- 100%的等规聚丙烯。 7. The glueless biaxially oriented polypropylene film for paper-plastic composite according to claim 1, characterized in that the upper layer and the core layer are both isotactic polypropylene containing 60%-100%.
8、 根据权利要求 7所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 所述上 层、 芯层均为由含量大于 60%且小于 100%的等规聚丙烯与选自抗静电剂、 爽滑剂、 增刚剂 至少之一所组成的混合物。 8. The glue-free biaxially oriented polypropylene film for paper-plastic composite according to claim 7, characterized in that the upper layer and the core layer are made of isotactic polypropylene and selected materials with a content of greater than 60% and less than 100%. A mixture composed of at least one of antistatic agent, slip agent and stiffening agent.
9、 根据权利要求 1所述的纸塑复合用无胶双向拉伸聚丙烯薄膜， 其特征在于， 所述纸 塑复合用无胶双向拉伸聚丙烯薄膜的总厚度为 17μηι -21μηι, 所述功能层的厚度为 2.5μηι -4.5μηι, 所述上表层的厚度为 2.5μηι -3.5μηι。 9. The glueless biaxially oriented polypropylene film for paper-plastic composite according to claim 1, wherein the total thickness of the glueless biaxially oriented polypropylene film for paper-plastic composite is 17 μm - 21 μm, and the The thickness of the functional layer is 2.5 μm -4.5 μm, and the thickness of the upper surface layer is 2.5 μm -3.5 μm.
10、一种根据权利要求 1-9所述的纸塑复合用无胶双向拉伸聚丙烯薄膜的制备方法， 其 特征在于，包括如下步骤： 10. A method for preparing the glue-free biaxially oriented polypropylene film for paper-plastic composite according to claims 1-9, characterized in that it includes the following steps:
1 )将预制备的原料送入挤出设备的不同层对应的料斗内后塑化成熔体； 1) Send the pre-prepared raw materials into the hoppers corresponding to different layers of the extrusion equipment and then plasticize them into melt;
2 )所述熔体通过管道经过滤器过滤后分配到模头成型， 再经流延铸片生成厚片； 2) The melt is filtered through the pipeline and distributed to the die for molding, and then cast into thick sheets;
3 )所述厚片经拉伸装置的横向拉伸和纵向拉伸处理后制成薄膜； 3) The thick sheet is made into a film after being transversely stretched and longitudinally stretched by a stretching device;
4 )所述薄膜经电暈处理或火焰处理后形成母卷， 所述母卷再经时效处理和分切后制成 所述纸塑复合用无胶双向拉伸聚丙烯薄膜成品。 4) The film is corona treated or flame treated to form a mother roll, and the mother roll is then aged and slit to make the finished glue-free biaxially oriented polypropylene film for paper-plastic composite.
11、 根据权利要求 10所述的制备方法， 其特征在于， 所述挤出设备和所述模头的温度 控制在 225 °C-265 °C ,所述流延铸片温度控制在 18°C-50°C ,所述纵向拉伸的温度控制在 80 °C -140 °C且所述纵向拉伸倍率为 4.8-6;所述横向拉伸的温度控制在 150°C-170°C且所述横向拉 伸倍率为 8-9.5 , 表面处理强度为 32-43 mN/m。 11. The preparation method according to claim 10, characterized in that the temperature of the extrusion equipment and the die is controlled at 225°C-265°C, and the temperature of the cast sheet is controlled at 18°C. -50°C, the temperature of the longitudinal stretching is controlled at 80°C-140°C and the longitudinal stretching ratio is 4.8-6; the temperature of the transverse stretching is controlled at 150°C-170°C and The transverse stretching ratio is 8-9.5, and the surface treatment intensity is 32-43 mN/m.
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CN102139552A (en) * 2010-01-29 2011-08-03 何凌 Polypropylene double-way stretched film and preparation method thereof
CN102794966A (en) * 2012-08-06 2012-11-28 北京康得新复合材料股份有限公司 Glue-free bidirectional stretching polypropylene film used for paper-plastic composite and preparation method thereof
CN202847034U (en) * 2012-08-06 2013-04-03 北京康得新复合材料股份有限公司 Adhesive-free biaxially oriented polypropylene film for paper plastic lamination

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