CN112721342A - Antistatic shielding PE composite film and preparation method thereof - Google Patents

Antistatic shielding PE composite film and preparation method thereof Download PDF

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Publication number
CN112721342A
CN112721342A CN202011578581.9A CN202011578581A CN112721342A CN 112721342 A CN112721342 A CN 112721342A CN 202011578581 A CN202011578581 A CN 202011578581A CN 112721342 A CN112721342 A CN 112721342A
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layer
film
adhesive layer
sensitive adhesive
pressure
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付立洲
付南山
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Heyuan Hejing Photoelectric Technology Co.,Ltd.
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Huizhou Hejing New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • 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
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • 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
    • 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
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • 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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance 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
    • 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
    • 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
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • 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
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    • C08J2329/00—Characterised 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
    • C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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    • C08J2429/00—Characterised 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
    • C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/04—Polysiloxanes
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Abstract

The invention discloses an antistatic shielding PE composite film, which comprises a polyethylene resin film, wherein a polyurethane bottom layer is arranged on one side of the polyethylene resin film, a polycarbonate layer is arranged on the other side of the polyethylene resin film, the polyethylene resin film is positioned between the polyurethane bottom layer and the polycarbonate layer, a first adhesive layer is arranged between the polyurethane bottom layer and the polyethylene resin film, a second adhesive layer is arranged between the polycarbonate layer and the polyethylene resin film, an antiglare layer is arranged on the surface of the polyurethane bottom layer, a first pressure-sensitive adhesive layer is arranged on the surface of the antiglare layer, and a silicate gel film is arranged on one side of the first pressure-sensitive adhesive layer; the composite film has less actions, so that all parts of the mold are required to be mutually non-interfered, stable, reliable and consistent in the movement process, the requirement on the manufacturing precision of the composite film is higher, the processing difficulty is reduced, the manufacturing period is relatively shortened, and the manufacturing cost is obviously reduced.

Description

Antistatic shielding PE composite film and preparation method thereof
Technical Field
The invention relates to the technical field of preparation of PE composite membranes, in particular to an anti-static shielding PE composite membrane and a preparation method thereof.
Background
At present, the composite film has a complex structure compared with a single-process film, the composite film has more processes, and thus, the requirements of each part of a die on noninterference, stability, reliability and consistency in the moving process are required, so that the manufacturing precision requirement of the composite film is higher, the processing difficulty is higher, the manufacturing period is relatively longer, the manufacturing cost is obviously increased, the sizes between the inner shape and the outer shape of a workpiece and between the inner shape and the inner shape of the workpiece are limited to a certain extent and cannot be too small, otherwise, the strength of the die is influenced, so that the die cannot be normally used, when a cutting edge is ground and blanked, the formed film part needs to be changed correspondingly in order to keep the relative height, the edge grinding is inconvenient and troublesome, the requirement of the composite film on the transparency is very high, but the composite film often has the condition of insufficient transparency in the composite processing of a.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an antistatic shielding PE composite film, wherein a polyethylene resin film is respectively adhered to a polycarbonate layer and a polyurethane bottom layer through a first adhesive layer and a second adhesive layer, an antiglare layer is coated on one side of the polyurethane bottom layer, the antiglare layer is in coextrusion composite connection with the first pressure-sensitive adhesive layer, a release agent layer is coated on one side of the polycarbonate layer, the release agent layer is in coextrusion composite connection with the second pressure-sensitive adhesive layer, the antiglare layer, the first pressure-sensitive adhesive layer, the release agent layer and the second pressure-sensitive adhesive layer are formed by jointly extruding and adhering through a film tearing machine, a silicate gel film and a polyvinyl alcohol film are adhered through the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, the silicate gel film is adhered to the polyurethane bottom layer through the first pressure-sensitive adhesive layer, the polyvinyl alcohol film is adhered to the polycarbonate layer through the second pressure-sensitive adhesive layer, the composite film has a more complex structure than a single-process mold, and the composite film has more actions, so that all parts of the mold are required to be mutually noninterfered, stable, reliable and consistent in the movement process, therefore, the requirement on the manufacturing precision of the composite membrane is higher, but the processing difficulty is reduced, the manufacturing period is relatively shortened, the manufacturing cost is obviously reduced, meanwhile, the sizes between the inner shape and the outer shape and between the inner shape and the inner shape of the product are limited by a certain range, the size cannot be too small, thus the strength of the die is affected, the phenomenon that the die can not be used normally can not occur, when the blanking edge is polished, the forming die part needs to be changed correspondingly in order to keep the relative height, the edge grinding is convenient and more convenient, and the composite film has high requirement on the transparency, but in the composite processing of the plastic film, the composite film does not have the situation of insufficient transparency, and the problems in the background technology are solved: the composite film has a complex structure compared with a single-process die, and the composite film has more actions, so that the requirements of each part of the die on noninterference, stability, reliability and consistency in the motion process are required, therefore, the manufacturing precision requirement on the composite film is higher, the processing difficulty is higher, the manufacturing period is relatively longer, the manufacturing cost is obviously increased, the sizes between the inner shape and the outer shape of a workpiece and between the inner shape and the inner shape of the workpiece are limited to a certain extent and cannot be too small, otherwise, the strength of the die is influenced, so that the die cannot be normally used, and when a cutting edge is ground and blanked, the forming die needs to be changed correspondingly in order to keep the relative height, the edge grinding is inconvenient and troublesome, the requirement on the transparency of the composite film is very high, but in the composite processing of the plastic film, the problem that the transparency of the composite.
In order to solve the above technical problem, the present invention provides a first technical solution as follows:
the antistatic shielding PE composite film comprises a polyethylene resin film, wherein a polyurethane bottom layer is arranged on one side of the polyethylene resin film, a polycarbonate layer is arranged on the other side of the polyethylene resin film, the polyethylene resin film is positioned between the polyurethane bottom layer and the polycarbonate layer, a first adhesive layer is arranged between the polyurethane bottom layer and the polyethylene resin film, a second adhesive layer is arranged between the polycarbonate layer and the polyethylene resin film, an antiglare layer is arranged on the surface of the polyurethane bottom layer, a first pressure-sensitive adhesive layer is arranged on the surface of the antiglare layer, a silicate gel film is arranged on one side of the first pressure-sensitive adhesive layer, a release agent layer is arranged on the surface of the polycarbonate layer, a second pressure-sensitive adhesive layer is arranged on the surface of the release agent layer, and a polyvinyl alcohol film is arranged on one side of the second pressure-sensitive adhesive layer.
As a further scheme of the invention, one side of the first pressure-sensitive adhesive layer is provided with an anti-glare layer, and a first pressure-sensitive adhesive layer is arranged between the silicate gel film and the anti-glare layer.
As a further scheme of the present invention, a release agent layer is disposed on one side of the second pressure-sensitive adhesive layer, and a second pressure-sensitive adhesive layer is disposed between the polyvinyl alcohol film and the release agent layer.
As a further scheme of the invention, the anti-glare layer is coated on one side of the polyurethane bottom layer, and the anti-glare layer and the first pressure-sensitive adhesive layer are in co-extrusion composite connection.
As a further scheme of the invention, the release agent layer is coated on one side of the polycarbonate layer, and the release agent layer and the second pressure-sensitive adhesive layer are in co-extrusion composite connection.
As a further aspect of the present invention, the thickness of the polyethylene resin film is set to 80 to 100 μm, the thickness of the polyurethane back layer is set to 40 to 60 μm, the thickness of the polycarbonate layer is set to 40 to 60 μm, the thickness of the silicate gel film is set to 80 to 100 μm, and the thickness of the polyvinyl alcohol film is set to 80 to 100 μm.
In order to solve the above technical problem, the present invention provides the following second technical solution:
the preparation method of the antistatic shielding PE composite film comprises the following specific steps:
step S1: the polyethylene resin film is adhered to the polycarbonate layer through the first adhesive layer, and the polyethylene resin film is adhered to the polyurethane bottom layer through the second adhesive layer, wherein the polyethylene resin film is prepared by the following steps:
step A1: the electromagnetic wave shielding additive is 10-100 parts by weight, preferably 30-70 parts by weight, calculated by 100 parts by weight of polyethylene resin, and the electromagnetic wave shielding additive is mainly two, one is a mixture of metal conductive fibers and metal conductive powder, and the other is a mixture of metal conductive fibers and carbon fibers;
step A2: the metal fiber as the fibrous filler and the metal conductive powder as the spherical filler are compounded to be used as the electromagnetic shielding additive, the electric conductivity of the electromagnetic shielding additive is larger than that of the spherical or fibrous filler which is used alone, because the shape of the filler has larger influence on the electric conductivity, generally, various fillers are beneficial to improving the electric conductivity when used together, when the two fillers are used together, four contact modes of point-to-point contact, point-to-line contact, line-to-point contact and line-to-line contact exist between particles, the contact area between the particles is large, the contact probability is large, the formed conductive network is relatively dense and complete, the electric conductivity is also higher, meanwhile, the electromagnetic wave shielding range is widened, and the electromagnetic wave shielding efficiency of the PE composite film can be synergistically improved;
step A3: the compatibility of the carbon fiber and the matrix resin is better than that of the metal fiber, the carbon fiber can be tightly combined with the matrix resin and uniformly dispersed in the matrix resin, so that the content of the electromagnetic shielding additive can be relatively reduced, in addition, the carbon fiber can be added to improve the mechanical property of the matrix, when an external force is applied, the particles generate a plurality of micro-deformation regions in the matrix, a large amount of energy is absorbed, the borne stress can be well transferred, the matrix can be induced to yield, a large amount of impact energy is consumed, and the effects of strengthening and toughening are achieved; in addition, the carbon fiber can also improve the antistatic property of the composition and has a synergistic effect with the metal conductive fiber in the aspect of electromagnetic shielding;
step S2: the anti-dazzle layer is coated on one side of the polyurethane bottom layer, the anti-dazzle layer is in co-extrusion composite connection with the first pressure-sensitive adhesive layer, the release agent layer is coated on one side of the polycarbonate layer, the release agent layer is in co-extrusion composite connection with the second pressure-sensitive adhesive layer, the anti-dazzle layer and the first pressure-sensitive adhesive layer as well as the release agent layer and the second pressure-sensitive adhesive layer are formed by being extruded and adhered together through a film tearing machine, and the silicate gel film and the polyvinyl alcohol film are adhered through the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, wherein the silicate gel film is prepared through the following steps:
step B1: contacting the silica gel with aliphatic carboxylic acid, wherein the mass ratio of the aliphatic carboxylic acid to water in the silica gel is 0.5-30;
step B2: adding inorganic acid, adjusting the pH value to 1-3, and reacting for 10-180 minutes;
step B3: heating the reaction system, and evaporating the azeotrope formed by the water in the silica gel and the aliphatic carboxylic acid;
step B4: further heating to the boiling point of the aliphatic carboxylic acid, and refluxing for 0.3-24 hours;
step B5: removing the silica gel, drying at 200-600 ℃ for 1-10 hours to obtain silica gel, and blowing the film by a co-extrusion process to obtain a silicic acid gel film;
step S3: the silicic acid gel film is bonded with the polyurethane bottom layer through a first pressure-sensitive adhesive layer, and the polyvinyl alcohol film is bonded with the polycarbonate layer through a second pressure-sensitive adhesive layer, wherein the polyvinyl alcohol film is prepared through the following steps:
step C1: taking the following components, by weight, 80-90% of polyvinyl alcohol resin, 5-15% of modified polyvinyl alcohol, 1-5% of ethylene glycol, 0.5-5% of silicone oil and 0.5-2% of propylene glycol;
step C2: weighing the components according to the formula, mixing, stirring, and adopting a reflux mode, controlling the temperature at 100 ℃ and 150 ℃ to completely dissolve the materials to obtain a mixed solution;
step C3: standing the mixed solution at the temperature of 100-300 ℃ for 1-2 hours, pouring the mixed solution into a advection mold preheated to the temperature of 90-100 ℃, casting the mixed solution on a mirror steel plate at room temperature, rapidly cooling the mixed solution to rapidly gel, and peeling the mixed solution from the steel plate to obtain a polyvinyl alcohol film;
step S4: the polyethylene resin film, the silicic acid gel film and the polyvinyl alcohol film are connected in a co-extrusion compounding mode through a film tearing machine, and finally the anti-static shielding PE composite film is formed.
Compared with the prior art, the invention has the following beneficial effects:
1. the polyethylene resin film is respectively adhered to a polycarbonate layer and a polyurethane bottom layer through a first adhesive layer and a second adhesive layer, an anti-glare layer is coated on one side of the polyurethane bottom layer and is in co-extrusion composite connection with a first pressure-sensitive adhesive layer, a release agent layer is coated on one side of the polycarbonate layer, the release agent layer is in co-extrusion composite connection with a second pressure-sensitive adhesive layer, the anti-glare layer and the first pressure-sensitive adhesive layer as well as the release agent layer and the second pressure-sensitive adhesive layer are formed by jointly extruding and adhering through a film tearing machine, and a silicate gel film and a polyvinyl alcohol film are adhered through the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, so that the silicate gel film is adhered to the polyurethane bottom layer through the first pressure-sensitive adhesive layer, and the polyvinyl alcohol film is adhered to the polycarbonate layer through the second pressure-sensitive adhesive layer;
2. the invention makes the composite film more complex than the single-process mold structure and the composite film has more actions, which requires that all parts of the mold do not interfere with each other, are stable, reliable and consistent in the moving process, therefore, the requirement on the manufacturing precision of the composite membrane is higher, but the processing difficulty is reduced, the manufacturing period is relatively shortened, the manufacturing cost is obviously reduced, meanwhile, the sizes between the inner shape and the outer shape and between the inner shape and the inner shape of the product are limited by a certain range, the size cannot be too small, thus the strength of the die is affected, the phenomenon that the die can not be used normally can not occur, when the blanking edge is ground, the forming die part needs to be changed correspondingly in order to keep the relative height, the sharpening is convenient and relatively convenient, the composite film has high requirement on transparency, but the composite film does not have insufficient transparency in the composite processing of the plastic film.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a chromatographic structure of the present invention;
in the figure: 1. a polyethylene resin film; 2. a polyurethane bottom layer; 3. a polycarbonate layer; 4. a first adhesive layer; 5. a second adhesive layer; 6. an anti-glare layer; 7. a first pressure-sensitive adhesive layer; 8. a silicic acid gel film; 9. a release agent layer; 10. a second pressure-sensitive adhesive layer; 11. a polyvinyl alcohol film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-2, an antistatic PE composite film comprises a polyethylene resin film 1, a polyurethane bottom layer 2 disposed on one side of the polyethylene resin film 1, and the other side of the polyethylene resin film 1 is provided with a polycarbonate layer 3, the polyethylene resin film 1 is positioned between the polyurethane bottom layer 2 and the polycarbonate layer 3, a first adhesive layer 4 is arranged between the polyurethane bottom layer 2 and the polyethylene resin film 1, and a second adhesive layer 5 is arranged between the polycarbonate layer 3 and the polyethylene resin film 1, an anti-glare layer 6 is arranged on the surface of the polyurethane bottom layer 2, a first pressure-sensitive adhesive layer 7 is arranged on the surface of the anti-glare layer 6, a silicate gel film 8 is arranged on one side of the first pressure-sensitive adhesive layer 7, a release agent layer 9 is arranged on the surface of the polycarbonate layer 3, a second pressure-sensitive adhesive layer 10 is arranged on the surface of the release agent layer 9, and a polyvinyl alcohol film 11 is arranged on one side of the second pressure-sensitive adhesive layer 10.
One side of the first pressure-sensitive adhesive layer 7 is provided with an anti-glare layer 6, a first pressure-sensitive adhesive layer 7 is arranged between the silicic acid gel film 8 and the anti-glare layer 6, the first pressure-sensitive adhesive layer 7 takes a natural rubber elastomer as a main body, and is matched with a complex mixture of additives such as tackifying resin, a softening agent, an anti-aging agent, a pigment filler, a crosslinking (vulcanizing) agent and the like, so that the first pressure-sensitive adhesive layer 7 can be well mixed and dissolved with a plurality of tackifying resins to obtain high viscosity and good wettability on a bonded material, and the silicic acid gel film 8 plays a role in anti-static shielding, so that the whole composite film has the function of.
The second pressure-sensitive adhesive layer 10 is arranged between the polyvinyl alcohol film 11 and the release agent layer 9, and the polyvinyl alcohol film 11 is a water-soluble polymer and is characterized in that the compactness is good, the crystallinity is high, the bonding force is strong, the prepared film is flexible and smooth, oil-resistant, solvent-resistant, wear-resistant and gas-barrier, and the water-resistant property is achieved through special treatment.
The anti-glare layer 6 is coated on one side of the polyurethane bottom layer 2, the anti-glare layer 6 is in co-extrusion composite connection with the first pressure-sensitive adhesive layer 7, and the anti-glare layer 6 is in co-extrusion composite connection with the first pressure-sensitive adhesive layer 7 through a film tearing machine.
The release agent layer 9 is coated on one side of the polycarbonate layer 3, the release agent layer 9 and the second pressure-sensitive adhesive layer 10 are in co-extrusion composite connection, the release agent layer 9 mainly improves the self lubricity of polymer molecules, and the release agent layer requires certain affinity or intermiscibility with resin polymers.
The thickness of the polyethylene resin film 1 is set to be 80-100 mu m, the thickness of the polyurethane bottom layer 2 is set to be 40-60 mu m, the thickness of the polycarbonate layer 3 is set to be 40-60 mu m, the thickness of the silicate gel film is set to be 80-100 mu m, the thickness of the polyvinyl alcohol film 11 is set to be 80-100 mu m, and parameters of all layers are set, so that the performance of the protective film in all aspects can achieve an optimal use effect.
The preparation method of the antistatic shielding PE composite film comprises the following specific steps:
step S1: the polyethylene resin film 1 is adhered to the polycarbonate layer 3 through the first adhesive layer 4, the polyethylene resin film 1 is adhered to the polyurethane bottom layer 2 through the second adhesive layer 5, wherein the polyethylene resin film 1 is prepared by the following steps:
step A1: the electromagnetic wave shielding additive is 10-100 parts by weight, preferably 30-70 parts by weight, calculated by 100 parts by weight of polyethylene resin, and the electromagnetic wave shielding additive is mainly two, one is a mixture of metal conductive fibers and metal conductive powder, and the other is a mixture of metal conductive fibers and carbon fibers;
step A2: the metal fiber as the fibrous filler and the metal conductive powder as the spherical filler are compounded to be used as the electromagnetic shielding additive, the electric conductivity of the electromagnetic shielding additive is larger than that of the spherical or fibrous filler which is used alone, because the shape of the filler has larger influence on the electric conductivity, generally, various fillers are beneficial to improving the electric conductivity when used together, when the two fillers are used together, four contact modes of point-to-point contact, point-to-line contact, line-to-point contact and line-to-line contact exist between particles, the contact area between the particles is large, the contact probability is large, the formed conductive network is relatively dense and complete, the electric conductivity is also higher, meanwhile, the electromagnetic wave shielding range is widened, and the electromagnetic wave shielding efficiency of the PE composite film can be synergistically improved;
step A3: the compatibility of the carbon fiber and the matrix resin is better than that of the metal fiber, the carbon fiber can be tightly combined with the matrix resin and uniformly dispersed in the matrix resin, so that the content of the electromagnetic shielding additive can be relatively reduced, in addition, the carbon fiber can be added to improve the mechanical property of the matrix, when an external force is applied, the particles generate a plurality of micro-deformation regions in the matrix, a large amount of energy is absorbed, the borne stress can be well transferred, the matrix can be induced to yield, a large amount of impact energy is consumed, and the effects of strengthening and toughening are achieved; in addition, the carbon fiber can also improve the antistatic property of the composition and has a synergistic effect with the metal conductive fiber in the aspect of electromagnetic shielding;
step S2: the anti-glare layer 6 is coated on one side of the polyurethane bottom layer 2, the anti-glare layer 6 is in co-extrusion composite connection with the first pressure-sensitive adhesive layer 7, meanwhile, the release agent layer 9 is coated on one side of the polycarbonate layer 3, the release agent layer 9 is in co-extrusion composite connection with the second pressure-sensitive adhesive layer 10, the anti-glare layer 6 and the first pressure-sensitive adhesive layer 7, the release agent layer 9 and the second pressure-sensitive adhesive layer 10 are formed by co-extrusion and adhesion through a film tearing machine, the silicate gel film 8 and the polyvinyl alcohol film 11 are adhered through the first pressure-sensitive adhesive layer 7 and the second pressure-sensitive adhesive layer 10, and the silicate gel film 8 is prepared through the following steps:
step B1: contacting the silica gel with aliphatic carboxylic acid, wherein the mass ratio of the aliphatic carboxylic acid to water in the silica gel is 0.5-30;
step B2: adding inorganic acid, adjusting the pH value to 1-3, and reacting for 10-180 minutes;
step B3: heating the reaction system, and evaporating the azeotrope formed by the water in the silica gel and the aliphatic carboxylic acid;
step B4: further heating to the boiling point of the aliphatic carboxylic acid, and refluxing for 0.3-24 hours;
step B5: removing the silica gel, drying at 200-600 ℃ for 1-10 hours to obtain silica gel, and blowing the film by a co-extrusion process to obtain a silicic acid gel film 8;
step S3: the silicic acid gel film 8 is bonded with the polyurethane bottom layer 2 through a first pressure sensitive adhesive layer 7, and the polyvinyl alcohol film 11 is bonded with the polycarbonate layer 3 through a second pressure sensitive adhesive layer 10, wherein the polyvinyl alcohol film 11 is prepared by the following steps:
step C1: taking the following components in percentage by weight, 80-90% of polyvinyl alcohol resin, 5-15% of modified polyvinyl alcohol, 1-5% of ethylene glycol, 0.5-5% of silicone oil and 0.5-2% of propylene glycol, wherein the propylene glycol can be replaced by methanol, ethanol or isopropanol, the modified polyvinyl alcohol is natural polyphenol and calcium oxide compounded modified polyvinyl alcohol, and comprises 20-30% of polyvinyl alcohol, 10-15% of natural polyphenol, 10-15% of calcium oxide and 50-60% of water in percentage by weight, wherein the natural polyphenol comprises theaflavin, lycopene, procyanidine, punicalagin, coffee polyphenol, olive polyphenol, pycnogenol, curcumin, ferulic acid or phloretin;
step C2: weighing the components according to the formula, mixing, stirring, and adopting a reflux mode, controlling the temperature at 100 ℃ and 150 ℃ to completely dissolve the materials to obtain a mixed solution;
step C3: standing the mixed solution at the temperature of 100-300 ℃ for 1-2 hours, pouring the mixed solution into a advection mold preheated to the temperature of 90-100 ℃, casting the mixed solution on a mirror steel plate at room temperature, rapidly cooling the mixed solution to rapidly gel, and peeling the mixed solution from the steel plate to obtain a polyvinyl alcohol film 11;
step S4: the polyethylene resin film 1, the silicic acid gel film 8 and the polyvinyl alcohol film 11 are connected in a co-extrusion compounding way through a film tearing machine, and finally an anti-static shielding PE composite film is formed;
the working principle is as follows: the polyethylene resin film is respectively adhered to the polycarbonate layer 3 and the polyurethane bottom layer 2 through the first adhesive layer 4 and the second adhesive layer 5, the anti-dazzle layer 6 is coated on one side of the polyurethane bottom layer 2, the anti-dazzle layer 6 is connected with the first pressure-sensitive adhesive layer 7 in a co-extrusion composite mode, meanwhile, the release agent layer 9 is coated on one side of the polycarbonate layer 3, the release agent layer 9 and the second pressure-sensitive adhesive layer 10 are in co-extrusion composite connection, the anti-glare layer 7 and the first pressure-sensitive adhesive layer 7, the release agent layer 9 and the second pressure-sensitive adhesive layer 10 are formed by extruding and sticking together through a film tearing machine, the silicate gel film 8 and the polyvinyl alcohol film 11 are adhered through the first pressure-sensitive adhesive layer 7 and the second pressure-sensitive adhesive layer 10, so that the silicate gel film 8 is adhered to the polyurethane bottom layer 2 through the first pressure-sensitive adhesive layer 7, and the polyvinyl alcohol film 11 is adhered to the polycarbonate layer 3 through the second pressure-sensitive adhesive layer 10.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims (7)

1. The antistatic PE composite film comprises a polyethylene resin film (1), and is characterized in that a polyurethane bottom layer (2) is arranged on one side of the polyethylene resin film (1), a polycarbonate layer (3) is arranged on the other side of the polyethylene resin film (1), the polyethylene resin film (1) is positioned between the polyurethane bottom layer (2) and the polycarbonate layer (3), a first adhesive layer (4) is arranged between the polyurethane bottom layer (2) and the polyethylene resin film (1), a second adhesive layer (5) is arranged between the polycarbonate layer (3) and the polyethylene resin film (1), an antiglare layer (6) is arranged on the surface of the polyurethane bottom layer (2), a first pressure-sensitive adhesive layer (7) is arranged on the surface of the antiglare layer (6), a silicate gel film (8) is arranged on one side of the first pressure-sensitive adhesive layer (7), the surface of polycarbonate layer (3) is provided with release agent layer (9), the surface of release agent layer (9) is provided with second pressure sensitive adhesive layer (10), one side of second pressure sensitive adhesive layer (10) sets up polyvinyl alcohol film (11).
2. An antistatic and shielding PE composite film according to claim 1, wherein an antiglare layer (6) is provided on one side of the first pressure-sensitive adhesive layer (7), and the first pressure-sensitive adhesive layer (7) is provided between the silicate gel film (8) and the antiglare layer (6).
3. An antistatic and shielding PE composite film according to claim 1, wherein a release agent layer (9) is arranged on one side of the second pressure sensitive adhesive layer (10), and the second pressure sensitive adhesive layer (10) is arranged between the polyvinyl alcohol film (11) and the release agent layer (9).
4. The antistatic shielding PE composite film according to claim 2, wherein the antiglare layer (6) is coated on one side of the polyurethane bottom layer (2), and the antiglare layer (6) is in coextrusion compounding connection with the first pressure-sensitive adhesive layer (7).
5. An antistatic PE composite film according to claim 3, wherein the release agent layer (9) is coated on one side of the polycarbonate layer (3), and the release agent layer (9) is connected with the second pressure-sensitive adhesive layer (10) in a co-extrusion compounding manner.
6. An antistatic and shielding PE composite film according to claim 1, wherein the thickness of the polyethylene resin film (1) is set to 80-100 μm, the thickness of the polyurethane back layer (2) is set to 40-60 μm, the thickness of the polycarbonate layer (3) is set to 40-60 μm, the thickness of the silicate gel film is set to 80-100 μm, and the thickness of the polyvinyl alcohol film (11) is set to 80-100 μm.
7. A preparation method of an antistatic PE composite film, which is characterized in that the antistatic PE composite film is the antistatic PE composite film according to any one of claims 1 to 6, and the preparation method of the antistatic PE composite film comprises the following specific steps:
step S1: the polyethylene resin film (1) is adhered to the polycarbonate layer (3) through the first adhesive layer (4), the polyethylene resin film (1) is adhered to the polyurethane bottom layer (2) through the second adhesive layer (5), and the polyethylene resin film (1) is prepared through the following steps:
step A1: the electromagnetic wave shielding additive is 10-100 parts by weight, preferably 30-70 parts by weight, calculated by 100 parts by weight of polyethylene resin, and the electromagnetic wave shielding additive is mainly two, one is a mixture of metal conductive fibers and metal conductive powder, and the other is a mixture of metal conductive fibers and carbon fibers;
step A2: compounding metal fibers as fibrous fillers and metal conductive powder as spherical fillers to serve as an electromagnetic shielding additive, wherein the electric conductivity of the electromagnetic shielding additive is greater than that of spherical or fibrous fillers used alone;
step A3: the compatibility of the carbon fiber and the matrix resin is better than that of the metal fiber, the carbon fiber is tightly combined with the matrix resin and uniformly dispersed in the matrix resin, the content of the electromagnetic shielding additive can be relatively reduced, the mechanical property of the matrix is improved by the added carbon fiber, when the electromagnetic shielding additive is subjected to external force, particles generate a plurality of micro-deformation regions in the matrix, a large amount of energy is absorbed, the borne stress can be well transferred, the matrix can be induced to yield, a large amount of impact energy is consumed, and the optimization process of reinforcement and toughening is achieved; the carbon fiber improves the antistatic property of the composition and has a synergistic effect with the metal conductive fiber in the aspect of electromagnetic shielding;
step S2: the anti-glare layer (6) is coated on one side of the polyurethane bottom layer (2), the anti-glare layer (6) is in co-extrusion composite connection with the first pressure-sensitive adhesive layer (7), meanwhile, the release agent layer (9) is coated on one side of the polycarbonate layer (3), the release agent layer (9) is in co-extrusion composite connection with the second pressure-sensitive adhesive layer (10), the anti-glare layer (6) and the first pressure-sensitive adhesive layer (7), the release agent layer (9) and the second pressure-sensitive adhesive layer (10) are formed by jointly extruding and sticking through a film tearing machine, the silicate gel film (8) and the polyvinyl alcohol film (11) are stuck through the first pressure-sensitive adhesive layer (7) and the second pressure-sensitive adhesive layer (10), and the silicate gel film (8) is prepared through the following steps:
step B1: contacting the silica gel with aliphatic carboxylic acid, wherein the mass ratio of the aliphatic carboxylic acid to water in the silica gel is 0.5-30;
step B2: adding inorganic acid, adjusting the pH value to 1-3, and reacting for 10-180 minutes;
step B3: heating the reaction system, and evaporating the azeotrope formed by the water in the silica gel and the aliphatic carboxylic acid;
step B4: further heating to the boiling point of the aliphatic carboxylic acid, and refluxing for 0.3-24 hours;
step B5: removing the silica gel, drying for 1-10 hours at 200-600 ℃ to obtain silica gel, and blowing the film by a co-extrusion process to obtain a silicic acid gel film (8);
step S3: the silicic acid gel film (8) is bonded with the polyurethane bottom layer (2) through a first pressure-sensitive adhesive layer (7), and the polyvinyl alcohol film (11) is bonded with the polycarbonate layer (3) through a second pressure-sensitive adhesive layer (10), wherein the polyvinyl alcohol film (11) is prepared by the following steps:
step C1: taking the following components, by weight, 80-90% of polyvinyl alcohol resin, 5-15% of modified polyvinyl alcohol, 1-5% of ethylene glycol, 0.5-5% of silicone oil and 0.5-2% of propylene glycol;
step C2: weighing the components according to the formula, mixing, stirring, and adopting a reflux mode, controlling the temperature at 100 ℃ and 150 ℃ to completely dissolve the materials to obtain a mixed solution;
step C3: standing the mixed solution at the temperature of 100-300 ℃ for 1-2 hours, pouring the mixed solution into a advection mold preheated to the temperature of 90-100 ℃, casting the mixed solution on a mirror steel plate at room temperature, rapidly cooling the mixed solution to rapidly gel, and peeling the mixed solution from the steel plate to obtain a polyvinyl alcohol film (11);
step S4: and (3) carrying out co-extrusion compounding connection on the polyethylene resin film (1), the silicic acid gel film (8) and the polyvinyl alcohol film (11) through a film tearing machine to finally obtain the antistatic shielding PE composite film.
CN202011578581.9A 2020-12-28 2020-12-28 Antistatic shielding PE composite film and preparation method thereof Pending CN112721342A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101056531A (en) * 2007-05-25 2007-10-17 北京理工大学 Flame-resisting anti-static polythene compound film for shielding wide band electromagnetic wave and its preparing method
CN102702654A (en) * 2012-05-09 2012-10-03 江苏申乾食品包装有限公司 Polyvinyl alcohol (PVA) film for packaging and preparation method thereof
CN202643625U (en) * 2012-07-02 2013-01-02 太湖金张科技有限公司 Special protection film with anti-dazzle inner structure for outer screen
CN102897776A (en) * 2011-07-25 2013-01-30 中国石油天然气股份有限公司 Silica gel preparation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101056531A (en) * 2007-05-25 2007-10-17 北京理工大学 Flame-resisting anti-static polythene compound film for shielding wide band electromagnetic wave and its preparing method
CN102897776A (en) * 2011-07-25 2013-01-30 中国石油天然气股份有限公司 Silica gel preparation method
CN102702654A (en) * 2012-05-09 2012-10-03 江苏申乾食品包装有限公司 Polyvinyl alcohol (PVA) film for packaging and preparation method thereof
CN202643625U (en) * 2012-07-02 2013-01-02 太湖金张科技有限公司 Special protection film with anti-dazzle inner structure for outer screen

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