CN114434927A - Easy-to-tear film with drying function and preparation method thereof - Google Patents

Easy-to-tear film with drying function and preparation method thereof Download PDF

Info

Publication number
CN114434927A
CN114434927A CN202111658430.9A CN202111658430A CN114434927A CN 114434927 A CN114434927 A CN 114434927A CN 202111658430 A CN202111658430 A CN 202111658430A CN 114434927 A CN114434927 A CN 114434927A
Authority
CN
China
Prior art keywords
layer
parts
easy
barrier
coating
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
CN202111658430.9A
Other languages
Chinese (zh)
Inventor
黄文娟
王清
李全布
黄湘晖
曹凯
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.)
Bemis Flexible Packaging Suzhou Co Ltd
Original Assignee
Bemis Flexible Packaging Suzhou Co Ltd
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 Bemis Flexible Packaging Suzhou Co Ltd filed Critical Bemis Flexible Packaging Suzhou Co Ltd
Priority to CN202111658430.9A priority Critical patent/CN114434927A/en
Publication of CN114434927A publication Critical patent/CN114434927A/en
Pending legal-status Critical Current

Links

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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/082—Layered products comprising a layer of metal comprising metal 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 comprising vinyl resins; comprising acrylic resins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/088—Layered products comprising a layer of metal comprising metal 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 comprising polyamides
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/09—Layered products comprising a layer of metal comprising metal 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 comprising polyesters
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/06—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
    • B32B27/10—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 paper or cardboard
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2345/00—Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2351/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses an easy-to-tear film with a drying function, which comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of one or more of PET, BOPP, paper, polyamide and NY; the barrier layer is made of aluminum foil or BOPP with a barrier coating; and a functional layer is arranged between the barrier layer and the heat sealing layer and comprises one or more of PET, polyamide, NY and PVC. The invention can realize strong hygroscopicity, low high-barrier water permeability, high peel strength, large tensile strength and excellent comprehensive performance in all aspects.

Description

Easy-to-tear film with drying function and preparation method thereof
Technical Field
The invention relates to the field of composite sheets, in particular to an easy-to-uncover film with a drying function and a preparation method thereof.
Background
The easy-to-tear film is a product which is convenient for life style of people and brings good experience for consumers. The application of the easy-to-tear film is not limited to industrial products such as yogurt cup cover films, cosmetic cover films and the like, and medical appliance articles and medicines are also a large industrial field for the development of the easy-to-tear film. Some medical products are extremely sensitive to moisture, such as rapid test paper or dry powder inhalation preparations, and the packaging requirement cannot be met by a package with a barrier layer, and the residual moisture in the package and the moisture permeating from the side surface can cause the corrosion of the device or destroy the stability of drug molecules. Often, a small package of desiccant is placed inside the packaged product. The manufacturing process of adding small packages separately is complicated, and the cost is high; potential safety hazards exist when the product is contacted; accidents easily occur due to improper treatment. Therefore, the research on a sheet with strong hygroscopicity, good barrier property, high peel strength and excellent comprehensive performance is an urgent problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention provides an easy-to-tear film with a drying function, which overcomes the defects in the prior art, and has the advantages of strong hygroscopicity, high barrier water permeability, low water permeability, high peeling strength, high tensile strength and excellent comprehensive performance in all aspects.
In order to achieve the purpose, the technical scheme of the invention is to provide an easy-to-tear film with a drying function, which comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of one or more of PET, BOPP, paper, polyamide and NY; the barrier layer is made of aluminum foil or BOPP with a barrier coating; the composite layer in the heat sealing layer comprises 10-30 parts of LDPE, 15-30 parts of maleic anhydride grafted polyethylene resin, 12-25 parts of LLDPE, 6-20 parts of HDPE, 0.5-2 parts of shaping agent and 0.5-2.5 parts of cross-linking agent; the moisture absorption layer comprises 0-20 parts of LDPE, 15-35 parts of LLDPE, 3-35 parts of HDPE, 50-70 parts of terpene resin, 5-20 parts of polysiloxane modified epoxy resin, 2-8 parts of phenolic resin and 5-10 parts of drying agent; the easy-uncovering layer comprises 10-25 parts of polyethylene, 8-27 parts of polybutylene, 12-20 parts of EVA, 4-26 parts of polypropylene, 1-5 parts of poly alpha-olefin, 1-2 parts of antioxidant and 2-7 parts of reinforcing agent.
Material code and Chinese are compared as table:
PET polyethylene terephthalate
BOPP Biaxially oriented polypropylene film
NY Nylon
EMAA Ethylene-methacrylic acid copolymer
LLDPE Linear low density polyethylene
HDPE High density polyethylene
LDPE Low density polyethylene
EVA Ethylene-vinyl acetate copolymer
PVC Polyvinyl chloride
EMA Ethylene methyl acrylate copolymer
Further, a functional layer is arranged between the barrier layer and the heat sealing layer, and the functional layer comprises one or more of PET, polyamide, NY and PVC. The functional layer can improve the straightness or easily tear the nature, can set up according to the demand of difference.
The outer layer is a printing layer, can realize printing or forming a protective layer, and can be designed to have an anti-fake function. The heat sealing layer is formed by three layers of a composite layer, a moisture absorption layer and an easy-to-tear layer through co-extrusion, and the easy-to-tear and moisture absorption functions are realized. The composite layer can adjust the proportion according to different stiffness requirements, the HDPE content is high, and the stiffness is increased.
Further, the barrier layer can be made of opaque high-barrier aluminum foil or a BOPP material with a transparent high-barrier coating according to customer requirements, and the BOPP barrier coating is one or more of silicon oxide, iron oxide, magnesium oxide and aluminum oxide. The BOPP with the barrier coating is a transparent high-barrier material, the product is transparent and visual, and the packaging material can be recycled. The high-barrier coating is coated on the surface of the BOPP, the thickness and the formula of the coating are adjusted, the requirements of barrier and boiling resistance can be met, and the thickness of the coating is generally controlled to be 15-200 mu m. The application of the coating material can further improve the barrier property of the barrier layer, reduce the water permeability and further improve the quality of products.
The drying agent is one or more of lime, molecular sieve, calcium chloride and silica gel. The moisture absorption amount of the moisture absorption layer can be adjusted by adjusting the proportion of the drying agent and the resin, and the drying agent and the resin account for 10-80% in general. The quicklime desiccant is preferable, and the water absorption process of the quicklime desiccant is a chemical reaction and has irreversibility.
The plasticizer is one or more of diisononyl phthalate, zinc ethyl phenyl dithiocarbamate and didecyl phthalate. The plasticizer is a high molecular additive, and has good compatibility with polymers with high boiling points, difficult volatilization and difficult processing. The plasticizer is distributed among macromolecular chains, so that intermolecular force is reduced, the viscosity of the polymer is reduced, the processability is improved, and the tensile strength performance of the material is improved.
The crosslinking agent is one or more of tricyclohexylphosphine, binaphthol and bis (diphenylphosphine) ferrocene. The cross-linking agent material participating in bonding can provide at least one electron to form covalent bond or complex coordination, so that the raw material matching property is increased, the intermolecular internal energy is reduced, and a synergistic effect is formed, so that the mechanical property of the composite layer material is improved, and the composite layer material has excellent tensile strength.
The antioxidant is one or more of antioxidant 1010, antioxidant 168, antioxidant 1076 and antioxidant 164. The material is heated and sheared to generate free radicals, and when meeting oxygen, the free radicals generate peroxide free radicals, and the peroxide free radicals further abstract hydrogen atoms from the main chain of the polymer to generate relatively stable polymer-based hydroperoxide. The cycle is repeated, the chain grows, and the reaction is gradually enlarged. The hydrogen donor antioxidant is used for stopping the chain reaction by providing H atoms or electrons and consuming peroxide free radicals, is mainly used for preventing or delaying aging and deterioration of the polyethylene material, and simultaneously has other components of a stable system, so that the antioxidant has a synergistic effect and has effects of maintaining the peeling strength performance and stabilizing the strength performance of the material easy to strip.
The reinforcing agent is one or more of neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether and 1, 6-hexanediol diglycidyl ether. The reinforcing agent can reduce the brittleness of the resin, increase the toughness and improve the bearing strength capability, is mixed and dissolved with the resin, contains active groups, can participate in the curing reaction of the resin and improves the tensile strength and the peeling strength of the easy-to-uncover layer.
The invention also provides a preparation method of the easy-to-uncover film with the drying function, the outer layer and the barrier layer adopt dry type or solvent-free compounding, and the usage amount of the glue is 1.5-5g/m2(ii) a The heat sealing layer is compounded with the barrier layer in a dry compounding or extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by coating in the extrusion compounding process, the coating is polyurethane or acrylic acid or EMAA or EMA adhesive resin, and the using amount of the coating is 0.5-6g/m2。
The preferable easy-to-tear film with the functional layer and the drying function is characterized in that the outer layer, the barrier layer and the functional layer are compounded in a dry manner or in a solvent-free manner, and the using amount of glue is 1.5-5g/m2(ii) a The heat sealing layer is compounded with the functional layer in a dry compounding or extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by coating in the extrusion compounding process, the coating is polyurethane or acrylic acid or EMAA or EMA adhesive resin, and the using amount of the coating is 0.5-6g/m2。
There are more than two materials with different properties, and the process is called compounding. The compounding is widely classified into four types, namely extrusion compounding, dry compounding, wet compounding and solvent-free compounding. Dry lamination is a process of bonding two or more different base materials together by an adhesive; extrusion compounding adopts a screw extruder of multilayer co-extrusion blow molding equipment, a barrier screw device and a jacket type heating convection temperature control device are used for smelting thermoplastic materials to form a steady flow plastic fluid, the steady flow plastic fluid is collected to a die head through a rotating smooth layer, and a blown film with certain functional orientation is obtained through a flattening roller, a rubber roller, an exhaust roller and a trimming device.
The invention has the advantages and beneficial effects that: the moisture absorption capacity is strong, the proportion or the layer thickness ratio of the drying agent can be adjusted according to the requirement of the moisture absorption capacity of a client, and the moisture absorption capacity is adjusted to be 0.1-10g/m2. The peel strength is high, and the peel strength is 3-8N/15mm under the condition of easy uncovering. Quicklime is used as a drying agent, the quicklime is dispersed in the moisture absorption layer and shows special light yellow or gray due to interaction of materials, the color is changed from yellow to white after water absorption, and the moisture absorption degree can be conveniently judged by using the flesh and eyes of people. The barrier layer is made of high-barrier material with water permeability less than or equal to 0.5g/m224 hrs. The improvement of the formula of the composite layer material and the modification of the materials of the moisture absorption layer and the easy-to-tear layer improve the physical properties of the film, and the tensile strength is more than or equal to 25 MPa. When the outer layer/the blocking layer/the functional layer/the heat-seal layer are combined by NY/aluminum/PVC/heat-seal layer interlayer materials from outside to inside, the forming performance is excellent, and the height of the convex top is more than or equal to 24 mm. When the BOPP/heat-sealing layer interlayer material combination of the BOPP/barrier coating is adopted, the packaging material can be recycled. The invention has obvious cost advantage, excellent comprehensive performance in all aspects, strong industrialization capability, stable and controllable quality and stronger application prospect.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of PET; the barrier layer is made of aluminum foil; the composite layer comprises 10 parts of LDPE, 15 parts of maleic anhydride grafted polyethylene resin, 12 parts of LLDPE, 6 parts of HDPE, 0.5 part of diisononyl phthalate serving as a shaping agent and 0.5 part of tricyclohexylphosphine serving as a crosslinking agent; the moisture absorption layer comprises 0 part of LDPE, 15 parts of LLDPE, 3 parts of HDPE, 50 parts of terpene resin, 5 parts of polysiloxane modified epoxy resin, 2 parts of phenolic resin and 5 parts of quick lime drying agent; the easy-uncovering layer comprises 10 parts of polyethylene, 8 parts of polybutylene, 12 parts of EVA (ethylene-vinyl acetate), 4 parts of polypropylene, 1 part of poly alpha-olefin, 1 part of antioxidant 1010 and 2 parts of neopentyl glycol diglycidyl ether serving as a reinforcing agent.
According to the preparation method of the easy-uncovering film with the drying function, the outer layer and the barrier layer are compounded in a dry mode, and the using amount of glue is 1.5g/m2(ii) a The heat sealing layer is compounded with the barrier layer in a dry compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peeling strength is increased by the coating in the extrusion process, the coating is made of polyurethane, and the using amount of the coating is 0.5g/m2。
Example 2
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of BOPP; the barrier layer is made of BOPP with a barrier coating layer made of silicon oxide; the composite layer comprises 30 parts of LDPE, 30 parts of maleic anhydride grafted polyethylene resin, 25 parts of LLDPE, 20 parts of HDPE, 2 parts of zinc ethyl phenyl dithiocarbamate serving as a shaping agent and 2.5 parts of binaphthol serving as a crosslinking agent; the moisture absorption layer comprises 20 parts of LDPE, 35 parts of LLDPE, 35 parts of HDPE, 70 parts of terpene resin, 20 parts of polysiloxane modified epoxy resin, 8 parts of phenolic resin and 10 parts of molecular sieve drying agent; the easy-uncovering layer comprises 25 parts of polyethylene, 27 parts of polybutylene, 20 parts of EVA (ethylene-vinyl acetate), 26 parts of polypropylene, 5 parts of poly alpha-olefin, 2 parts of antioxidant 168 and 7 parts of reinforcing agent 1, 4-butanediol diglycidyl ether.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer and the blocking layer are compounded without solvent, and the using amount of glue is 5g/m2(ii) a The heat sealing layer is compounded with the barrier layer in an extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peeling strength is increased by the coating in the extrusion compounding process, the coating is acrylic acid, and the using amount of the coating is 6g/m2。
Example 3
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer, a functional layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of NY; the barrier layer is made of aluminum foil; the material adopted by the functional layer comprises PVC; the composite layer comprises 20 parts of LDPE, 20 parts of maleic anhydride grafted polyethylene resin, 18 parts of LLDPE, 15 parts of HDPE, and 1 part of zinc ethylphenyldithiocarbamate in weight percent: 1 part of cross-linking agent bis (diphenylphosphino) ferrocene; the moisture absorption layer comprises 10 parts of LDPE, 20 parts of LLDPE, 15 parts of HDPE, 60 parts of terpene resin, 10 parts of polysiloxane modified epoxy resin, 5 parts of phenolic resin and 8 parts of calcium chloride drying agent; the easy-uncovering layer comprises 15 parts of polyethylene, 15 parts of polybutylene, 15 parts of EVA (ethylene-vinyl acetate), 12 parts of polypropylene, 3 parts of poly alpha-olefin, 1.5 parts of antioxidant 1076 and 5 parts of reinforcing agent 1, 6-hexanediol diglycidyl ether.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer, the barrier layer and the functional layer are compounded in a dry mode, and the using amount of glue is 2.5g/m2(ii) a The heat sealing layer is compounded with the functional layer in a dry compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peeling strength is increased by the coating in the extrusion compounding process, the coating is EMAA, and the using amount of the coating is 3g/m2。
Example 4
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of PET; the barrier layer is made of aluminum foil; the composite layer comprises the following components of 30 parts of LDPE, 15 parts of maleic anhydride grafted polyethylene resin, 25 parts of LLDPE, 6 parts of HDPE, 2 parts of a shaping agent diisononyl phthalate, and 0.5 part of binaphthol in weight percent: a cross-linking agent with weight percent of bis (diphenylphosphine) ferrocene equal to 5: 1; the moisture absorption layer comprises 20 parts of LDPE, 15 parts of LLDPE, 30 parts of HDPE, 55 parts of terpene resin, 10 parts of polysiloxane modified epoxy resin, 6 parts of phenolic resin and 10 parts of silica gel drying agent; the easy-uncovering layer comprises 25 parts of polyethylene, 8 parts of polybutylene, 20 parts of EVA, 10 parts of polypropylene, 4 parts of poly alpha-olefin, 2 parts of antioxidant 164 and 4 parts of reinforcing agent 1, 4-butanediol diglycidyl ether.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer and the blocking layer are compounded without solvent, and the using amount of glue is 4g/m2(ii) a The heat sealing layer is compounded with the barrier layer in an extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by the coating in the extrusion compounding process, the coating is EMA adhesive resin, and the using amount of the coating is 5g/m2。
Example 5
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer comprises BOPP: NY is 3:1 material by mass ratio; the barrier layer is made of aluminum foil; the composite layer comprises 10 parts of LDPE, 30 parts of maleic anhydride grafted polyethylene resin, 12 parts of LLDPE, 20 parts of HDPE, 0.5 part of zinc ethyl phenyl dithiocarbamate serving as a shaping agent and 2.5 parts of tricyclohexylphosphine serving as a crosslinking agent; the moisture absorption layer comprises 15 parts of LDPE, 15 parts of LLDPE, 20 parts of HDPE, 65 parts of terpene resin, 10 parts of polysiloxane modified epoxy resin, 8 parts of phenolic resin and quicklime in percentage by weight: 10 parts of drying agent with the weight percent of molecular sieve being 1: 2; the easy-uncovering layer comprises 15 parts of polyethylene, 18 parts of polybutylene, 16 parts of EVA (ethylene-vinyl acetate), 22 parts of polypropylene, 3 parts of poly alpha-olefin, 1 part of antioxidant 1076 and 3 parts of neopentyl glycol diglycidyl ether serving as a reinforcing agent.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer and the barrier layer are compounded without solvent, and the using amount of glue is 3g/m2(ii) a The heat sealing layer is compounded with the barrier layer in a dry compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by the coating in the extrusion compounding process, the coating is acrylic acid, and the using amount of the coating is 4g/m2。
Example 6
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer, a functional layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of polyamide; the barrier layer is made of aluminum foil; the functional layer comprises PVC: NY is 1:4 material by mass ratio; the coating of the coating aluminum is EMAA, and the coating mass ratio of aluminum: EMAA is 1: 5; the composite layer comprises 15 parts of LDPE, 25 parts of maleic anhydride grafted polyethylene resin, 20 parts of LLDPE, 12 parts of HDPE, 1.5 parts of a shaping agent diisononyl phthalate and 2 parts of a crosslinking agent binaphthol; the moisture absorption layer comprises 12 parts of LDPE, 15 parts of LLDPE, 30 parts of HDPE, 70 parts of terpene resin, 20 parts of polysiloxane modified epoxy resin, 6 parts of phenolic resin and 8 parts of quick lime drying agent; the easy-uncovering layer comprises 10 parts of polyethylene, 25 parts of polybutylene, 15 parts of EVA (ethylene-vinyl acetate), 12 parts of polypropylene, 3 parts of poly-alpha-olefin and 2 parts of antioxidant 1010 wt%: 168 weight percent of antioxidant, namely 3:2, and 7 parts of reinforcing agent 1, 4-butanediol diglycidyl ether.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer, the barrier layer and the functional layer are compounded without solvent, and the using amount of glue is 4g/m2(ii) a The heat-sealing layer is compounded with the functional layer in an extrusion compounding mode, and the heat-sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by adopting co-extrusion processing; wherein the interlayer peeling strength is increased by the coating in the extrusion compounding process, the coating is EMAA, and the using amount of the coating is 2g/m2。
Example 7
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of paper; the barrier layer is made of BOPP with a barrier coating layer made of ferric oxide; the composite layer comprises 30 parts of LDPE, 15 parts of maleic anhydride grafted polyethylene resin, 25 parts of LLDPE, 15 parts of HDPE, 1 part of didecyl phthalate serving as a shaping agent and 2 parts of tricyclohexylphosphine serving as a cross-linking agent; the moisture absorption layer comprises 10 parts of LDPE, 22 parts of LLDPE, 15 parts of HDPE, 50 parts of terpene resin, 15 parts of polysiloxane modified epoxy resin, 6 parts of phenolic resin and 10 parts of calcium chloride drying agent; the easy-uncovering layer comprises 10 parts of polyethylene, 25 parts of polybutylene, 15 parts of EVA (ethylene-vinyl acetate), 20 parts of polypropylene, 4 parts of poly alpha-olefin, 2 parts of antioxidant 1076 and 5 parts of neopentyl glycol diglycidyl ether by weight percent: 1, 4-butanediol diglycidyl ether weight percent is 1: 1.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer and the barrier layer are compounded without solvent, and the using amount of glue is 5g/m2(ii) a The heat-sealing layer is compounded with the barrier layer in an extrusion compounding mode, and the heat-sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peeling strength is increased by the coating in the extrusion compounding process, the coating is made of polyurethane, and the using amount of the coating is 6g/m2。
Example 8
An easy-to-tear film with a drying function comprises an outer layer, a barrier layer and a heat sealing layer from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of NY; the barrier layer adopts magnesium oxide with a barrier coating in weight percent: BOPP with 1: 3.5% alumina by weight; the composite layer comprises 30 parts of LDPE, 20 parts of maleic anhydride grafted polyethylene resin, 12 parts of LLDPE, 20 parts of HDPE, 1 part of zinc ethyl phenyl dithiocarbamate serving as a shaping agent and 0.5-2.5 parts of bis (diphenylphosphino) ferrocene serving as a crosslinking agent; the moisture absorption layer comprises 15 parts of LDPE, 20 parts of LLDPE, 15 parts of HDPE, 70 parts of terpene resin, 15 parts of polysiloxane modified epoxy resin, 8 parts of phenolic resin and 6 parts of molecular sieve drying agent; the easy-uncovering layer comprises 25 parts of polyethylene, 8 parts of polybutylene, 20 parts of EVA (ethylene-vinyl acetate), 12 parts of polypropylene, 3 parts of poly alpha-olefin, 2 parts of antioxidant 1010 and 5 parts of reinforcing agent 1, 4-butanediol diglycidyl ether.
According to the preparation method of the easy-to-uncover film with the drying function, the outer layer and the blocking layer are compounded without solvent, and the using amount of glue is 1.5g/m2(ii) a The heat sealing layer is compounded with the barrier layer in a dry compounding way, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by the coating in the extrusion compounding process, the coating is EMA adhesive resin, and the using amount of the coating is 0.5g/m2。
Comparative example
The comparative example is based on example 2 with the difference that no desiccant was added in comparative example 1, no barrier coating was added to the BOPP in comparative example 2 and ordinary PE was used for the heat seal layer three layers in comparative example 3.
1. Inventive and comparative example test results for examples 1-8
Figure BDA0003446677440000101
By examining examples 1 to 8, the moisture absorption amount of the release film in 0 to 12 days was examined under the ambient temperature environment (23 ℃/40% RH), and the moisture absorption amount gradually increased in the 1 st and 2 nd days and reached the maximum value in the next 10 th day. The examples show that the release film using the quicklime desiccant has excellent moisture absorption, and the film material shows no moisture absorption capacity without adding the desiccant in comparative example 1. The invention uses high-barrier material, has better barrier water permeability, and the water permeability is less than or equal to 0.5g/m224hrs, no barrier coating was added to the BOPP in comparative example 2, and the water permeability was significantly increased. The invention has the advantages that the peel strength is 3-8N/15mm, the peel strength is high, the easy uncovering requirement is met, the heat sealing layer adopts common PE in the comparative example 3, and the peel strength is only 2N/15 mm. The tensile strength of the heat-sealing layers in examples 1-8 is more than or equal to 25MPa, the tensile strength of the film material is greatly reduced by adopting common PE in a comparative example 3, and the material modification of the composite layer, the moisture absorption layer and the easy-to-tear layer of the heat-sealing layer can be seen, so that the tensile strength can be greatly improvedThe tensile strength of the film is easy to uncover.
In conclusion, the invention has strong moisture absorption, and can adjust the proportion or the layer thickness ratio of the drying agent and adjust the moisture absorption according to the moisture absorption requirement of customers, wherein the moisture absorption is 0.1-10g/m2. The peel strength is high, and is 3-8N/15mm under the condition of satisfying easy uncovering. The quick lime is used as a drying agent, the quick lime is dispersed in the moisture absorption layer and shows special light yellow or gray due to interaction of materials, the color is changed from yellow to white after water absorption, and the moisture absorption degree can be judged by using the naked eyes of people conveniently. The barrier layer is used, the material has high barrier property, and the water permeability is less than or equal to 0.5g/m 2.24hrs. The improvement of the formula of the composite layer material and the modification of the materials of the moisture absorption layer and the easy-to-tear layer improve the physical properties of the film, and the tensile strength is more than or equal to 25 MPa. When the outer layer/the blocking layer/the functional layer/the heat sealing layer are combined by NY/aluminum/PVC/heat sealing layer interlayer materials from outside to inside, the forming performance is excellent, and the height of the convex top is more than or equal to 24 mm. When the BOPP/heat-sealing layer interlayer material of the BOPP/barrier coating is combined, the packaging material can be recycled. The invention has obvious cost advantage, excellent comprehensive performance in all aspects, strong industrialization capability, stable and controllable quality and stronger application prospect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the technical principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (10)

1. The utility model provides a take membrane of easily tearing off of drying function which characterized in that: the outer layer, the barrier layer and the heat sealing layer are arranged from outside to inside; the heat sealing layer comprises a composite layer, a moisture absorption layer and an easy-to-tear layer from outside to inside; the outer layer is made of one or more of PET, BOPP, paper, polyamide and NY; the barrier layer is made of aluminum foil or BOPP with a barrier coating; the composite layer in the heat sealing layer comprises 10-30 parts of LDPE, 15-30 parts of maleic anhydride grafted polyethylene resin, 12-25 parts of LLDPE, 6-20 parts of HDPE, 0.5-2 parts of plasticizer and 0.5-2.5 parts of cross-linking agent; the moisture absorption layer comprises 0-20 parts of LDPE, 15-35 parts of LLDPE, 3-35 parts of HDPE, 50-70 parts of terpene resin, 5-20 parts of polysiloxane modified epoxy resin, 2-8 parts of phenolic resin and 5-10 parts of drying agent; the easy-uncovering layer comprises 10-25 parts of polyethylene, 8-27 parts of polybutylene, 12-20 parts of EVA, 4-26 parts of polypropylene, 1-5 parts of poly alpha-olefin, 1-2 parts of antioxidant and 2-7 parts of reinforcing agent.
2. The release film with drying function according to claim 1, characterized in that: and a functional layer is arranged between the barrier layer and the heat sealing layer and comprises one or more of PET, polyamide, NY and PVC.
3. A release film with drying function according to claim 1 or 2, characterized in that: the BOPP barrier coating of the barrier coating is one or more of silicon oxide, iron oxide, magnesium oxide and aluminum oxide.
4. The release film with drying function according to claim 3, characterized in that: the drying agent is one or more of quicklime, molecular sieve, calcium chloride and silica gel.
5. The release film with drying function according to claim 4, wherein: the plasticizer is one or more of diisononyl phthalate, zinc ethyl phenyl dithiocarbamate and didecyl phthalate.
6. The release film with drying function according to claim 5, wherein: the cross-linking agent is one or more of tricyclohexylphosphine, binaphthol and bis (diphenylphosphino) ferrocene.
7. The release film with drying function according to claim 6, characterized in that: the antioxidant is one or more of antioxidant 1010, antioxidant 168, antioxidant 1076 and antioxidant 164.
8. The release film with drying function according to claim 7, characterized in that: the reinforcing agent is one or more of neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether and 1, 6-hexanediol diglycidyl ether.
9. The method for producing a release film having drying function according to any one of claims 1 or 4 to 8, wherein: the outer layer and the barrier layer are compounded in a dry manner or without solvent, and the using amount of the glue is 1.5-5g/m2(ii) a The heat sealing layer is compounded with the barrier layer in a dry compounding or extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by the coating in the extrusion compounding process, the coating is polyurethane or acrylic acid or EMAA or EMA adhesive resin, and the using amount of the coating is 0.5-6g/m2。
10. The method for preparing the easy-release film with the drying function according to any one of claims 2 or 4 to 8, wherein the outer layer, the barrier layer and the functional layer are compounded in a dry manner or in a solvent-free manner, and the glue is used in an amount of 1.5 to 5g/m2(ii) a The heat sealing layer is compounded with the functional layer in a dry compounding or extrusion compounding mode, and the heat sealing layer composite layer, the moisture absorption layer and the easy-to-tear layer are formed by co-extrusion processing; wherein the interlayer peel strength is increased by the coating in the extrusion compounding process, the coating is polyurethane or acrylic acid or EMAA or EMA adhesive resin, and the using amount of the coating is 0.5-6g/m2。
CN202111658430.9A 2021-12-30 2021-12-30 Easy-to-tear film with drying function and preparation method thereof Pending CN114434927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111658430.9A CN114434927A (en) 2021-12-30 2021-12-30 Easy-to-tear film with drying function and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111658430.9A CN114434927A (en) 2021-12-30 2021-12-30 Easy-to-tear film with drying function and preparation method thereof

Publications (1)

Publication Number Publication Date
CN114434927A true CN114434927A (en) 2022-05-06

Family

ID=81366226

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111658430.9A Pending CN114434927A (en) 2021-12-30 2021-12-30 Easy-to-tear film with drying function and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114434927A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104379805A (en) * 2012-06-23 2015-02-25 福瑞托-雷北美有限公司 Deposition of ultra-thin inorganic oxide coatings on packaging
CN104395493A (en) * 2012-06-23 2015-03-04 福瑞托-雷北美有限公司 Deposition of ultra-thin inorganic oxide coatings on packaging
CN104476875A (en) * 2015-01-14 2015-04-01 重庆科欣塑料有限公司 Polyolefin thin film with drying agent function and manufacturing method of polyolefin thin film with drying agent function
CN208216167U (en) * 2018-04-22 2018-12-11 佛山市彩龙镀膜包装材料有限公司 A kind of high-barrier ceramic alumina aluminium film
CN209240613U (en) * 2018-12-14 2019-08-13 杭州星点包装材料有限公司 A kind of novel HD glasss of soy sauce easily take off film
CN113400754A (en) * 2021-05-27 2021-09-17 江阴宝柏包装有限公司 Composite membrane with dry oxygen inhalation indication function and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104379805A (en) * 2012-06-23 2015-02-25 福瑞托-雷北美有限公司 Deposition of ultra-thin inorganic oxide coatings on packaging
CN104395493A (en) * 2012-06-23 2015-03-04 福瑞托-雷北美有限公司 Deposition of ultra-thin inorganic oxide coatings on packaging
CN104476875A (en) * 2015-01-14 2015-04-01 重庆科欣塑料有限公司 Polyolefin thin film with drying agent function and manufacturing method of polyolefin thin film with drying agent function
CN208216167U (en) * 2018-04-22 2018-12-11 佛山市彩龙镀膜包装材料有限公司 A kind of high-barrier ceramic alumina aluminium film
CN209240613U (en) * 2018-12-14 2019-08-13 杭州星点包装材料有限公司 A kind of novel HD glasss of soy sauce easily take off film
CN113400754A (en) * 2021-05-27 2021-09-17 江阴宝柏包装有限公司 Composite membrane with dry oxygen inhalation indication function and preparation method thereof

Similar Documents

Publication Publication Date Title
EP3606749B1 (en) Polyethylene laminates for use in flexible packaging materials
CN107750263B (en) Polyethylene film with matte surface
CN103571012A (en) Waterproof air-permeable plastic film, and preparation method and application thereof
US20140205847A1 (en) Multilayer blown films
CN1662374A (en) Multilayer film
CN103483785B (en) A kind of PETG heat-shrinkable film and preparation method thereof
CN108276640B (en) Bidirectional easy-tearing casting PE film and preparation method thereof
EP2521651A1 (en) Heat-shrinkable multi-layer film for deep-draw forming, and process for production thereof
CN113002100B (en) High-barrier composite film and preparation method thereof
CN102975451A (en) Polypropylene/polyethylene composite medical packaging film
CN101594991A (en) Have EVA or contain the PCTFE film of extruding coating of the EVA of UV absorbent
CN1894095A (en) Lamination adhesion of foil to thermoplastic polymers
CN1136291A (en) Oriented HDPE films with skin layers
CN103434237A (en) Easy-tearing type dry composite sheet and production method thereof
WO2005072962A1 (en) Layered polyamide film
CN108032568A (en) A kind of high lucifuge high-barrier liquid packaging film and its production method
KR20020064214A (en) Stretched polyamide film
WO2016174665A1 (en) Biodegradable sheets
CN103407261A (en) Composite film and preparation method thereof
EP3112152A1 (en) A method for producing a label and a label
CN114434927A (en) Easy-to-tear film with drying function and preparation method thereof
CN102963094A (en) Polyamide/polypropylene composite medical packaging film
FI73923C (en) Polyamide-containing multilayer film
KR101960538B1 (en) Adhesive bulk layer resin compositon and multilayer film for vacuum skin packaging
CN114347604A (en) Excellent corrosion-resistant sheet and preparation method thereof

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