CN111716857A - 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用 - Google Patents

一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用 Download PDF

Info

Publication number
CN111716857A
CN111716857A CN202010534719.9A CN202010534719A CN111716857A CN 111716857 A CN111716857 A CN 111716857A CN 202010534719 A CN202010534719 A CN 202010534719A CN 111716857 A CN111716857 A CN 111716857A
Authority
CN
China
Prior art keywords
barrier
melt
extrusion
multilayer composite
pva
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010534719.9A
Other languages
English (en)
Inventor
东为富
李婷
汪洋
王玮
施冬健
白绘宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangnan University
Original Assignee
Jiangnan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangnan University filed Critical Jiangnan University
Priority to CN202010534719.9A priority Critical patent/CN111716857A/zh
Publication of CN111716857A publication Critical patent/CN111716857A/zh
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07Flat, e.g. panels
    • B29C48/08Flat, e.g. panels flexible, e.g. films
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/18Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/18Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/34Layered products comprising a layer of synthetic resin comprising polyamides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284Application of adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38Packaging materials of special type or form
    • B65D65/40Applications of laminates for particular packaging purposes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • B32B2307/7242Non-permeable
    • B32B2307/7244Oxygen barrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • B32B2307/7265Non-permeable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00Packaging equipment or accessories not otherwise provided for
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2329/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/02Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/02Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02Organic and inorganic ingredients
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/16Halogen-containing compounds
    • C08K2003/162Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/05Alcohols; Metal alcoholates
    • C08K5/053Polyhydroxylic alcohols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/06Ethers; Acetals; Ketals; Ortho-esters

Landscapes

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

Abstract

一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用,由多层聚合物通过共挤出吹塑或共挤出流延方法复合形成,结构表达式为:A/(adh/C)n/B/(C/adh)n/A;式中:A表示表层,B表示阻隔层,adh表示粘结层,C表示附加层。其中阻隔层B为PVA‑EVOH的组合物,该组合物所含原料及各原料的重量份数为:PVA 40‑80份,EVOH 15‑30份,增塑剂5‑30份,热稳定剂0.5‑10份,金属盐0.1‑2份。A、C为热塑高分子聚合物。本发明薄膜具有优良的强度和阻氧阻水的阻隔性能,可用于各类食品、药品等包装领域。

Description

一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用
技术领域
本发明涉及材料加工领域,尤其是涉及一种熔融共挤多层复合高阻隔薄膜及其制备方法。
背景技术
据报道,世界每年生产约40亿吨食物,由于损失和浪费,30%至50%未被食用。药品浪费同样严重,每年我国因过期造成的药品浪费价值上千亿元。如何减少食品药品的损失和浪费是全球关注的重点。研究和分析食品药品的生产、加工、储存、流通、直到消费者手中的整个过程表明,使用高阻隔复合包装膜可以阻隔氧气和水汽,延长保质期,减少食品药品的损失和浪费,然而,整个复合膜产业发展过程中存在以下问题:常用的高阻隔复合膜价格太高;传统复合工艺中由于使用溶剂型粘合剂会产生大气污染、卫生安全等问题。
目前,铝箔及铝塑复合膜阻隔性能好,但不透明、耐折性差、成本高;PVDC具有良好的阻隔氧气和水蒸气的性能,涂层可热封,但其加工和废弃垃圾处理的过程中会产生HCI气体,即污染环境又污染被包装物,欧美等地区已经停止使用。
乙烯/乙烯醇共聚物(EVOH)具有优异的阻隔性能,热分解温度为158~189℃,但价格较高,导致其产品成本很高。CN 103009743 A的专利公开了一种十层共挤包装薄膜及其生产方法,其中,EVOH作为阻隔层,生产工艺复杂,产品成本高。聚乙烯醇(PVA)是一种价格更低廉、阻隔性能更优异的高分子材料,食品和药物管理局已经批准PVA可以与食品密切接触。但目前PVA高分子链相邻羟基间易形成大量的分子内和分子间氢键,使其热分解温度(200-250℃)与熔点(226℃)接近,熔融时即发生热分解,因而难以热塑加工成膜,且PVA薄膜容易吸水,吸水后阻隔性能下降;同时,PVA加工时易发生凝胶现象堵塞口模。由于EVOH树脂与PVA树脂熔点相差较大,通常无法直接共混。CN 107163465 A的专利公开了一种高阻隔性涂层材料及其制备方法,材料包括改性EVOH薄膜,改性EVOH薄膜的内表面上涂布有PVA纳米TiO2溶胶,使用的是溶液涂覆法,流程复杂。因此,研发工艺简单的低成本可熔融共挤多层复合高阻隔薄膜包装尤为重要。
发明内容
针对现有技术存在的上述问题,本申请人提供了一种熔融共挤多层复合高阻隔薄膜及其制备方法。本发明加入热稳定剂和金属盐来提高PVA的热分解温度,扩大PVA的熔融加工窗口,实现PVA与EVOH树脂的熔融加工,工艺简单;通过将PVA-EVOH组合树脂作为阻隔层,与其他树脂进行共挤成型,制备出的高阻隔薄膜成型工艺简单,在现有生产装置进行改造实现产业化,避免由于新工艺改变而进行大规模的投资;且阻隔层成本低廉,阻氧阻水效果好、力学性能优异,可用于各类食品、药品等包装领域。
本发明的技术方案如下:
一种熔融共挤多层复合高阻隔薄膜,由三层以上的聚合物通过共挤出吹塑或共挤出流延方法复合形成,所述聚合物包括树脂层,树脂层包括表层和阻隔层;所述的熔融共挤多层复合高阻隔薄膜的结构表达式为:A/(adh/C)n/B/(C/adh)n/A;n为0以上的整数;
式中:A表示表层,B表示阻隔层,adh表示粘结层,C表示附加层,A与C的材质相同或不同,两侧的表层A的材质相同或不同;A、C的材质为热塑高分子聚合物,所述阻隔层B的材质为PVA-EVOH高阻隔组合物。
所述表层A、C为通用的热塑高分子聚合物,主要为PE,PP,PET,PVC,PS,PC,ABS,PA-6,PA-66,PU中的一种或两种以上组合;所述阻隔层B为PVA-EVOH高阻隔组合物。
所述组合物所含原料及各原料的重量份数为:
Figure BDA0002536605780000031
进一步的,
Figure BDA0002536605780000032
所述PVA-EVOH高阻隔组合物的加工熔点为160-190℃。
所述PVA为聚合度500-2400,醇解度为85-100%PVA0599、PVA1099、PVA1799中的一组或两种以上组合。
所述EVOH中乙烯的含量(摩尔分数)为20-45%,乙烯醇含量(摩尔分数)为55-80%。
所述增塑剂为二聚甘油、三聚甘油、五聚甘油、十聚甘油、山梨醇、乙二醇、丙二醇、甘油、缩水甘油、聚乙二醇中的一种或两种以上混合。
所述热稳定剂为单宁酸、羟基酪醇、鞣花酸、绿原酸、咖啡酸、6,7-二羟基-4-甲基香豆素中的一种或两种以上混合。
所述金属盐为氯化镁、氯化钙、氯化锌、硝酸钙、硫酸钙、氯化铝中的一种或两种以上混合。
所述的PVA-EVOH高阻隔组合物的制备方法具体过程为:
(1)将聚PVA、增塑剂、热稳定剂、金属盐分别按照所述重量份数称取,加入混合机中,充分混合均匀,制得预混料,在常温或升温的条件下进行一段时间的塑化;
(2)最后将塑化好的的预混料与EVOH混合,放入挤出机中,直接挤出造粒,制得PVA-EVOH高阻隔组合物。
当共挤多层复合高阻隔薄膜的树脂层为三层时,表层与阻隔层之间直接共挤热压成膜,无需添加粘结树脂连接。
当共挤多层复合高阻隔薄膜的树脂层多于三层时,需在表层与次内层之间通过由粘结树脂组成的粘结层连接。
所述粘结树脂为马来酸酐接枝聚乙烯、沙林树脂、乙烯-醋酸乙烯共聚物、乙烯-丙烯酸甲酯共聚物、乙烯-丙烯酸共聚物中的一种或两种以上组合。
熔融共挤多层复合高阻隔薄膜是通过共挤出吹塑或共挤出流延方法复合形成,所采用的共挤出技术是同时多层挤出成形,即采用数台挤出机分别供给不同的熔融料流,将两种以上的热塑高分子聚合物与PVA-EVOH高阻隔组合物分别经不同的挤出机机头挤出后在同一口模中进行复合,每一种聚合物在成品薄膜(片材)中各自形成性质不同的树脂层。
所述的一种熔融共挤多层复合高阻隔薄膜可用于各类食品、药品等包装领域。
本发明有益的技术效果在于:
(1)本发明阻隔层PVA-EVOH树脂中所使用的增塑剂、热稳定剂和金属盐环保且无毒,可用于食品和医用阻隔包装材料等领域。
(2)将PVA-EVOH树脂作为熔融挤出复合膜的阻隔层,降低了复合膜阻隔层的厚度及成本,减少了PVA因交联凝胶而堵塞口模停机的现象。
(3)通过将PVA-EVOH组合树脂作为阻隔层,与其他树脂进行共挤成型,制备出的高阻隔薄膜成型工艺简单,在现有生产装置进行改造实现产业化,避免由于新工艺改变而进行大规模的投资。
(4)本发明的熔融共挤多层复合高阻隔薄膜阻隔层成本低廉,阻氧阻水效果好、力学性能优异,可用于各类食品、药品等包装领域。
具体实施方式
下面结合实施例,对本发明进行具体描述。
实施例1
称取聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1799)45重量份、聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1099)5重量份、聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1799)5重量份、山梨醇15重量份、二聚甘油10重量份、单宁酸5重量份、氯化钙1重量份加入搅拌机中,充分混合均匀,制得预混料;然后再将预混料在60℃的烘箱里塑化3小时;最后将塑化好的预混料与乙烯/乙烯醇共聚物(长春石油化学股份有限公司,牌号EV4405,乙烯含量44mol%)20重量份混合,放入单螺杆挤出机中进行造粒,制得PVA-EVOH阻隔层树脂1
实施例2
称取聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1799)45重量份、聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1099)5重量份、聚乙烯醇(中石化长城能源化工宁夏有限公司,牌号1799)5重量份、山梨醇15重量份、二聚甘油10重量份、单宁酸5重量份、氯化钙1重量份加入搅拌机中,充分混合均匀,制得预混料;然后再将预混料在60℃的烘箱里塑化3小时;最后将塑化好的预混料与乙烯/乙烯醇共聚物(长春石油化学股份有限公司,牌号EV3801,乙烯含量38mol%)20重量份混合放入单螺杆挤出机中进行造粒,制得PVA- EVOH阻隔层树脂2
实施例3复合薄膜的结构式表达如下:
PET/PVA-EVOH阻隔层树脂1/PP,
其中,PET与PP为表层,PVA-EVOH阻隔层树脂1为阻隔层。
三台挤出机分别供给不同的熔融料流,PET机头温度为290℃,PVA-EVOH阻隔层树 脂1机头温度为180℃,PP机头温度为210℃,将两种热塑高分子聚合物PET、PP与PVA-EVOH 隔层树脂1分别经不同的挤出机机头挤出后在同一口模中进行复合。
实施例4
复合薄膜的结构式表达如下:
PA/TIE/PE/PVA-EVOH阻隔层树脂2/PE/TIE/PP,
其中,PA与PP为表层,PE为次内层,PVA-EVOH阻隔层树脂2为阻隔层TIE为粘合层,为马来酸酐接枝聚乙烯。
七台挤出机分别供给不同的熔融料流,PA机头温度为280℃,PVA-EVOH阻隔层树脂 2机头温度为200℃,PE机头温度为170℃,PP机头温度为210℃,TIE层马来酸酐接枝聚乙烯机头温度为185℃,将上述物质分别经不同的挤出机机头挤出后在同一口模中进行复合。
比较例1
为PET薄膜。
比较例2
为PA薄膜。
比较例3
乙烯/乙烯醇共聚物(长春石油化学股份有限公司,牌号EV4405,乙烯含量44mol%)30重量份、山梨醇10重量份、氯化钙0.5重量份加入搅拌机中,充分混合均匀,制得预混料;然后再将预混料在60℃的烘箱里塑化3小时;最后将塑化好的预混料放入单螺杆挤出机中进行造粒,制得EVOH阻隔层树脂1
比较例4
复合薄膜的结构式表达如下:
PET/EVOH阻隔层树脂1/PP,
其中,PET与PP为表层,EVOH阻隔层树脂1为阻隔层。
三台挤出机分别供给不同的熔融料流,PET机头温度为290℃,EVOH阻隔层树脂1机头温度为180℃,PP机头温度为210℃,将两种热塑高分子聚合物PET、PP与EVOH阻隔层树脂1分别经不同的挤出机机头挤出后在同一口模中进行复合。
比较例5
乙烯/乙烯醇共聚物(长春石油化学股份有限公司,牌号EV3801,乙烯含量38mol%)30重量份、山梨醇10重量份、氯化钙0.5重量份加入搅拌机中,充分混合均匀,制得预混料;然后再将预混料在60℃的烘箱里塑化3小时;最后将塑化好的预混料放入单螺杆挤出机中进行造粒,制得EVOH阻隔层树脂2
比较例6
复合薄膜的结构式表达如下:
PA/TIE/PE/EVOH阻隔层树脂2/PE/TIE/PP,
其中,PA与PP为表层,PE为次内层,EVOH阻隔层树脂2为阻隔层TIE为粘合层,为马来酸酐接枝聚乙烯。
七台挤出机分别供给不同的熔融料流,PA机头温度为280℃,EVOH阻隔层树脂2机头温度为200℃,PE机头温度为170℃,PP机头温度为210℃,TIE层马来酸酐接枝聚乙烯机头温度为185℃,将上述物质分别经不同的挤出机机头挤出后在同一口模中进行复合。
测试:
将本发明实施例和对比例所得的产品进行热压成型或直接剪裁制备标准样条,按GB/T 13022-1991标准进行拉伸性能测试,采用热失重分析仪和差失扫描量热仪测试其热分解温度、熔点,按GB/T 19789-2005标准测试氧气透过量(仪器检测值下限为0.1cm3/(m2·24h·0.1MPa)),测试结果见表1所示。
表1
Figure BDA0002536605780000081
Figure BDA0002536605780000091
由表1中数据可以看出,与比较例1、比较例4相比,实施例3中使用PVA-EVOH阻隔层 树脂1为阻隔层的复合薄膜具有更好的阻氧和阻水性能,且力学性能优异;同样的,与比较例2、比较例6相比,实施例4中使用PVA-EVOH阻隔层树脂2为阻隔层的复合薄膜具有更好的阻氧和阻水性能,力学性能优异。
所属领域的普通技术人员应当理解:以上所述仅为本发明的具体实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (9)

1.一种熔融共挤多层复合高阻隔薄膜,其特征在于,由三层以上的聚合物通过共挤出吹塑或共挤出流延方法复合形成,所述聚合物包括树脂层,树脂层包括表层和阻隔层;所述的熔融共挤多层复合高阻隔薄膜的结构表达式为:A/(adh/C)n/B/(C/adh)n/A;n为0以上的整数;
式中:A表示表层,B表示阻隔层,adh表示粘结层,C表示附加层,A与C的材质相同或不同,两侧的表层A的材质相同或不同;A、C的材质为热塑高分子聚合物,所述阻隔层B的材质为PVA-EVOH高阻隔组合物。
2.根据权利要求1所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,所述PVA-EVOH高阻隔组合物所含原料及各原料的重量份数为:
Figure FDA0002536605770000011
3.根据权利要求2所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,所述PVA-EVOH高阻隔组合物所含原料及各原料的重量份数为:
Figure FDA0002536605770000012
4.根据权利要求2或3所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,PVA-EVOH高阻隔组合物的制备方法为:
(1)将聚PVA、增塑剂、热稳定剂、金属盐分别按照所述重量份数称取,加入混合机中,充分混合均匀,制得预混料,在常温或升温的条件下进行一段时间的塑化;
(2)最后将塑化好的的预混料与EVOH混合,放入挤出机中,直接挤出造粒,制得PVA-EVOH高阻隔组合物。
5.根据权利要求1、2或3所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,当共挤多层复合高阻隔薄膜的树脂层为三层时,表层与阻隔层之间直接共挤热压成膜,无需添加粘结树脂连接。
6.根据权利要求1、2或3所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,当共挤多层复合高阻隔薄膜的树脂层多于三层时,需在表层与次内层之间通过由粘结树脂组成的粘结层连接。
7.根据权利要求6所述的一种熔融共挤多层复合高阻隔薄膜,其特征在于,粘结树脂为马来酸酐接枝聚乙烯、沙林树脂、乙烯-醋酸乙烯共聚物、乙烯-丙烯酸甲酯共聚物、乙烯-丙烯酸共聚物中的一种或两种以上组合;热塑高分子聚合物为PE、PP、PET、PVC、PS、PC、ABS、PA-6、PA-66、PU中的一种或两种以上组合。
8.一种熔融共挤多层复合高阻隔薄膜的制备方法,其特征在于,熔融共挤多层复合高阻隔薄膜是通过共挤出吹塑或共挤出流延方法复合形成,所采用的共挤出技术是同时多层挤出成形,即采用数台挤出机分别供给不同的熔融料流,将两种以上的热塑高分子聚合物与PVA-EVOH高阻隔组合物分别经不同的挤出机机头挤出后在同一口模中进行复合,每一种聚合物在成品薄膜中各自形成性质不同的树脂层。
9.权利要求1~9所述的一种熔融共挤多层复合高阻隔薄膜的应用,其特征在于,薄膜用于各类食品、药品包装领域。
CN202010534719.9A 2020-06-12 2020-06-12 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用 Pending CN111716857A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010534719.9A CN111716857A (zh) 2020-06-12 2020-06-12 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010534719.9A CN111716857A (zh) 2020-06-12 2020-06-12 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用

Publications (1)

Publication Number Publication Date
CN111716857A true CN111716857A (zh) 2020-09-29

Family

ID=72568043

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010534719.9A Pending CN111716857A (zh) 2020-06-12 2020-06-12 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用

Country Status (1)

Country Link
CN (1) CN111716857A (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113619058A (zh) * 2021-08-12 2021-11-09 天津新兴东方临近空间航天科技有限公司 一种耐高低温的氟树脂氦气阻隔薄膜多层共挤薄膜工艺
CN113665210A (zh) * 2021-08-30 2021-11-19 广东丹青印务有限公司 一种可降解高阻隔食品包装袋、制备装置及方法
CN113733678A (zh) * 2021-09-06 2021-12-03 东莞市博晨塑料科技有限公司 一种全降解高阻隔共挤袋及其制备方法
CN115230271A (zh) * 2021-04-23 2022-10-25 中国石油化工股份有限公司 一种高阻隔防粘接复合膜及其制备方法和应用
CN115785551A (zh) * 2022-11-27 2023-03-14 无锡市太平洋新材料股份有限公司 一种易揭pe材料、易揭包装薄膜及其制备方法
WO2024077717A1 (zh) * 2022-10-09 2024-04-18 广域兴智能(南通)科技有限公司 一种简化阻隔膜的光转换膜及其制备方式

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1810502A (zh) * 2005-01-28 2006-08-02 朱家牧 低温高收缩高阻隔膜及其生产方法
CN102007179A (zh) * 2008-04-14 2011-04-06 日本合成化学工业株式会社 树脂组合物和使用其的多层结构体
CN105086306A (zh) * 2015-09-09 2015-11-25 江南大学 一种可熔融加工的聚乙烯醇组合物及其制备方法
CN109721912A (zh) * 2019-02-28 2019-05-07 康泰塑胶科技集团有限公司 一种阻隔层、多层塑料复合管及制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1810502A (zh) * 2005-01-28 2006-08-02 朱家牧 低温高收缩高阻隔膜及其生产方法
CN102007179A (zh) * 2008-04-14 2011-04-06 日本合成化学工业株式会社 树脂组合物和使用其的多层结构体
CN105086306A (zh) * 2015-09-09 2015-11-25 江南大学 一种可熔融加工的聚乙烯醇组合物及其制备方法
CN109721912A (zh) * 2019-02-28 2019-05-07 康泰塑胶科技集团有限公司 一种阻隔层、多层塑料复合管及制备方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115230271A (zh) * 2021-04-23 2022-10-25 中国石油化工股份有限公司 一种高阻隔防粘接复合膜及其制备方法和应用
CN115230271B (zh) * 2021-04-23 2024-05-07 中国石油化工股份有限公司 一种高阻隔防粘接复合膜及其制备方法和应用
CN113619058A (zh) * 2021-08-12 2021-11-09 天津新兴东方临近空间航天科技有限公司 一种耐高低温的氟树脂氦气阻隔薄膜多层共挤薄膜工艺
CN113665210A (zh) * 2021-08-30 2021-11-19 广东丹青印务有限公司 一种可降解高阻隔食品包装袋、制备装置及方法
CN113733678A (zh) * 2021-09-06 2021-12-03 东莞市博晨塑料科技有限公司 一种全降解高阻隔共挤袋及其制备方法
WO2024077717A1 (zh) * 2022-10-09 2024-04-18 广域兴智能(南通)科技有限公司 一种简化阻隔膜的光转换膜及其制备方式
CN115785551A (zh) * 2022-11-27 2023-03-14 无锡市太平洋新材料股份有限公司 一种易揭pe材料、易揭包装薄膜及其制备方法
CN115785551B (zh) * 2022-11-27 2024-03-01 无锡市太平洋新材料股份有限公司 一种易揭pe材料、易揭包装薄膜及其制备方法

Similar Documents

Publication Publication Date Title
CN111716857A (zh) 一种熔融共挤多层复合高阻隔薄膜、制备方法及其应用
CN103203934B (zh) 一种热收缩共聚酯薄膜及其制备方法
CN101864132B (zh) 一种聚乙烯醇薄膜的熔融制备方法
CN111703165A (zh) 一种涂覆型多层复合高阻隔薄膜、制备方法及其应用
JP3539846B2 (ja) 樹脂組成物およびその積層体
CN107868630B (zh) 一种具有阻隔功能的粘接树脂及其制备方法
WO2023115599A1 (zh) 可降解高阻隔复合膜及其制备方法
GB2185986A (en) Process for producing molded article
CN101607617B (zh) 一种可降解的bopp包装膜及其制法
CN102532595A (zh) 用于热塑加工的复配增塑剂及增塑聚乙烯醇的方法
CN100496944C (zh) 一种高阻隔降解膜及其制造方法
CN1736812B (zh) 纳米降解高阻隔包装膜及其制造方法
US4921907A (en) Resin composition and multilayered structure
JPH0796636B2 (ja) 樹脂組成物
JPH0797462A (ja) ラミナ体およびその製造方法
CN105017699A (zh) 生物基降解拉伸膜及其制备方法
CN103738015B (zh) 一种横向热收缩的双向拉伸聚酯薄膜及其制备方法
CN112848580B (zh) 一种petg/pet共挤自热封多层膜及其制备方法
CN117106289A (zh) 一种热塑性复合淋膜材料及其制备方法
CN111349298A (zh) 一种低成本可热塑加工的pva-evoh高阻隔组合物、制备方法及其应用
JP2000043040A (ja) エチレン−酢酸ビニル共重合体ケン化物組成物ペレットの製造法
CN112959782B (zh) 一种加工性能优异的完全可降解阻气气垫膜及其制备方法
JPS63114645A (ja) 加熱延伸多層構造体
CN110294910B (zh) 一种高温水溶型聚乙烯醇母粒及其制备方法
CN111605276A (zh) 一种熔融共挤多层透明的紫外近红外屏蔽高分子材料、制备方法及其应用

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200929