CN111361232A - High-temperature-resistant and light-aging-resistant PE film and preparation method thereof - Google Patents

High-temperature-resistant and light-aging-resistant PE film and preparation method thereof Download PDF

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Publication number
CN111361232A
CN111361232A CN202010231408.5A CN202010231408A CN111361232A CN 111361232 A CN111361232 A CN 111361232A CN 202010231408 A CN202010231408 A CN 202010231408A CN 111361232 A CN111361232 A CN 111361232A
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density polyethylene
silicon dioxide
heating sheet
nano silicon
gear
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王跃杰
葛振宗
孙自权
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Anhui Jie Cheng Packaging Products Co ltd
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Anhui Jie Cheng Packaging Products Co ltd
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Publication of CN111361232A publication Critical patent/CN111361232A/en
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • 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
    • B32B27/18—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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/71—Resistive to light or to UV
    • 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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • 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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a high-temperature-resistant and light-aging-resistant PE film which is divided into the following three layers from outside to inside: a nano titanium dioxide layer, a modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer and a nano titanium dioxide layer; the two nano titanium dioxide layers are respectively prepared from 10-15 parts by weight of nano titanium dioxide; the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer is prepared from 5-10 parts by weight of modified nano silicon dioxide, 30-60 parts by weight of linear low density polyethylene and 20-40 parts by weight of low density polyethylene; the modified nano silicon dioxide is prepared from 8-12 parts by weight of nano silicon dioxide, 1-5 parts by weight of silane coupling agent and 20-35 parts by weight of isopropanol; can solve the problems of poor high temperature resistance and poor light aging resistance of the existing PE film.

Description

High-temperature-resistant and light-aging-resistant PE film and preparation method thereof
Technical Field
The invention relates to the technical field of PE films, in particular to a high-temperature-resistant and light-aging-resistant PE film and a preparation method thereof.
Background
The PE film is a macromolecular organic compound with the simplest structure and is also a macromolecular material which is most widely applied at present, the PE film is a polymer using ethylene as a repeating unit, however, the PE film in the prior art is poor in high-temperature resistance and easy to damage at high temperature, so that the PE film cannot protect objects, and in addition, because the PE film in the prior art is poor in light aging resistance, the existing PE film is short in service life when used outdoors, and therefore the production cost is increased.
Publication No.: CN106084432A specifically discloses an antistatic PE film and a preparation method thereof, which can not solve the problems of poor high temperature resistance and easy damage at high temperature of the mentioned PE film in the prior art, so that the PE film can not protect objects.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant and light-aging-resistant PE film and a preparation method thereof, which can solve the problems of poor high-temperature resistance and poor light-aging resistance of the conventional PE film.
The purpose of the invention can be realized by the following technical scheme:
the high-temperature-resistant and light-aging-resistant PE film is divided into the following three layers from outside to inside: a nano titanium dioxide layer, a modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer and a nano titanium dioxide layer; the two nano titanium dioxide layers are respectively prepared from 10-15 parts by weight of nano titanium dioxide; the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer is prepared from 5-10 parts by weight of modified nano silicon dioxide, 30-60 parts by weight of linear low density polyethylene and 20-40 parts by weight of low density polyethylene; the modified nano silicon dioxide is prepared from 8-12 parts by weight of nano silicon dioxide, 1-5 parts by weight of silane coupling agent and 20-35 parts by weight of isopropanol;
the preparation method of the modified nano silicon dioxide comprises the following steps:
adding isopropanol into nano silicon dioxide powder, and uniformly stirring by using a stirrer; then putting a silane coupling agent into a container, adding isopropanol to dissolve, putting the container into an ultrasonic generator, carrying out ultrasonic treatment for 5-10min, after the ultrasonic treatment is finished, adding a mixture of nano silicon dioxide and isopropanol into the container, stirring for 30-40min by using a stirrer, heating water in the ultrasonic generator to 80-85 ℃, continuing the ultrasonic treatment for 30-35min, after the ultrasonic treatment is finished, putting the container into a vacuum oven with the temperature of 80-85 ℃, drying for 50-60min, and grinding and sieving the solid in the container to obtain modified nano titanium dioxide for later use;
the preparation method of the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer specifically comprises the following steps:
the method comprises the following steps: putting linear low-density polyethylene, low-density polyethylene and modified nano-silica into a container, uniformly mixing to obtain a mixed material, adding the mixed material into a kneading machine with the temperature and the rotating speed of 140-;
step two: starting a first heating sheet, a second heating sheet, a third heating sheet, a fourth heating sheet, a fifth heating sheet and a die head heating sheet, wherein the heating temperatures of the first heating sheet, the second heating sheet, the third heating sheet, the fourth heating sheet, the fifth heating sheet and the die head heating sheet are respectively 125-plus-one, 130 ℃, 135-plus-one, 140 ℃, 145-plus-one, 150-plus-one, 155 ℃ and 135-plus-one 140 ℃, then adding the mixture into a feed inlet of a single-screw extruder, starting a second motor and setting the rotating speed of a rotating shaft of the second motor to be 45-48r/min, driving a second belt wheel to rotate through the rotating shaft of the second motor, driving a first belt wheel to rotate through a rotating belt, driving a rotating rod to rotate through the first belt wheel, driving the first gear to rotate, driving the second gear to rotate through the first gear, thereby the second gear drives the connecting rod and rotates, thereby the connecting rod drives the extrusion hob to rotate, start first motor and set up first motor rotating shaft speed and be 12-15r/min, thereby first motor drives the feeding hob to rotate through its axis of rotation, thereby the feeding hob rotates thereby the compounding gets into inside the extrusion tube, the mixture melts at the extrusion tube inside, the molten mixture constantly is pushed to the die head by the extrusion hob, the mixture is extruded the granulation from the die head of single screw extruder at last and is obtained the mixed master batch, use the blown film device to blow the film shaping with the mixed master batch, obtain modified nano silica/linear low density polyethylene/low density polyethylene layer, it is reserve.
A preparation method of a high-temperature-resistant and light-aging-resistant PE film specifically comprises the following steps: and arranging nanometer titanium dioxide layers with the thickness of 10-15 mu m on the upper surface and the lower surface of the obtained modified nanometer silicon dioxide/linear low-density polyethylene/low-density polyethylene layer to obtain the high-temperature-resistant and light-aging-resistant PE film.
Preferably, the single screw extruder comprises a fixing frame, a support frame, a shell, an extrusion pipe and a feed inlet, a fixing base is installed on the surface of the bottom inside the fixing frame, a second motor is installed on the surface of the top of the fixing base, a second belt pulley is vertically installed on the surface of the top of one end of a rotating shaft of the second motor, a support plate is installed above the second motor, a support seat is installed on one side of the top of the support plate on the surface, a gear box is installed on the surface of the top of the support seat, a circular opening is arranged on the surface of the side wall on one side of the gear box, a first bearing is installed inside the circular opening, a rotating rod is installed inside the first bearing, a first belt pulley is vertically welded on the surface of one end of the rotating rod, and the first belt pulley is rotatably connected with the second belt pulley, the utility model discloses a gearbox, including dwang, gear box, extrusion pipe, first motor, first gear, second gear, first gear, second gear, the last circular opening of the surface of the lateral wall of the dwang other end of the gearbox, the last vertical welding of the surface of the connecting rod other end has the extrusion hob, the extrusion pipe is installed in the extrusion hob outside, the extrusion pipe is installed inside the shell, the top of extrusion pipe one end is provided with the opening, the open-ended is installed the feed inlet on the surface, the feed inlet hob is installed to the feed inlet bottom, first heating plate, second heating plate, third heating plate, fourth heating plate and fifth heating plate are installed in proper order to the other end in the extrusion pipe outside, the die head is installed to extrusion pipe one end, install the die head heating plate between groping and the fifth heating plate, the outside at the extrusion pipe is installed to the die head heating plate.
Preferably, the feeding port bottom is provided with the inlet pipe, the feeding hob is installed inside the inlet pipe, and the feeding hob is rotatably connected with the inlet pipe.
Preferably, the extrusion screw rod is rotatably connected with the extrusion pipe.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, linear low-density polyethylene/low-density polyethylene is modified by using modified nano-silica, the nano-silica can improve the ageing resistance, mechanical strength and chemical resistance of other materials, the light transmission and small granularity of the nano-silica are utilized, and the silica is difficult to mix and disperse when being matched with plastics, so that the nano-silica is modified by using a silane coupling agent, hydroxyl exists on the surface of the silica, the surface of the silica has chemical adsorption activity due to the existence of the hydroxyl, the modified nano-silica can be uniformly dispersed in organic matters, a single-screw extruder is used, a feeding screw rod and a first motor are arranged at a feeding port to control the feeding speed, and a first heating plate, a second heating plate, a third heating plate, a fourth heating plate, a fifth heating plate and a die head heating plate are arranged at the outer side of an extrusion pipe to enable the modified nano-silica to be modified, The linear low-density polyethylene and the low-density polyethylene can be mixed according to a molten form, the extrusion screw rod is arranged in the extrusion pipe, the second motor enables the extrusion screw rod to rotate through the first belt pulley, the second belt pulley, the rotating belt, the rotating rod, the first gear, the second gear and the connecting rod, the extrusion screw rod continuously pushes a molten mixture to the die head, the extrusion is carried out at the die head, then the film blowing device is used to obtain the modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer, the modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer has excellent toughness and light aging resistance, and therefore the problem that the light aging resistance of an existing PE film is poor is solved.
According to the invention, the nano titanium dioxide layers are arranged on the upper surface and the lower surface of the modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer, the nano titanium dioxide has excellent chemical stability and thermal stability, and the nano titanium dioxide layers formed on the upper surface and the lower surface of the modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer can effectively improve the chemical resistance and the high temperature resistance of the modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer, so that the problem of poor high temperature resistance of the conventional PE film is solved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of a single screw extruder;
FIG. 2 is a schematic view of the internal structure of a gear box of a single screw extruder;
FIG. 3 is a schematic view of the feed screw configuration of a single screw extruder;
FIG. 4 is a schematic view of the structure of an extrusion screw of a single screw extruder;
in the figure: 1. a fixed mount; 2. a support frame; 3. a housing; 4. extruding a pipe; 5. a feed inlet; 6. a first motor; 7. a feed screw; 8. a dust cover; 9. a gear case; 10. a first pulley; 11. a second pulley; 12. rotating the belt; 13. a second motor; 14. rotating the rod; 15. a first gear; 16. a second gear; 17. a connecting rod; 18. extruding a screw rod; 19. a first heating sheet; 20. a second heating plate; 21. a third heating plate; 22. a fourth heating plate; 23. fifthly, hot slices; 24. a die head heating plate; 25. a die head.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
Referring to fig. 1-4, a high temperature resistant and light aging resistant PE film is divided into the following three layers from outside to inside: a nano titanium dioxide layer, a modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer and a nano titanium dioxide layer; the two nano titanium dioxide layers are respectively prepared from 10-15 parts by weight of nano titanium dioxide; the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer is prepared from 5-10 parts by weight of modified nano silicon dioxide, 30-60 parts by weight of linear low density polyethylene and 20-40 parts by weight of low density polyethylene; the modified nano silicon dioxide is prepared from 8-12 parts by weight of nano silicon dioxide, 1-5 parts by weight of silane coupling agent and 20-35 parts by weight of isopropanol;
the preparation method of the modified nano silicon dioxide comprises the following steps:
adding isopropanol into nano silicon dioxide powder, and uniformly stirring by using a stirrer; then putting a silane coupling agent into a container, adding isopropanol to dissolve, putting the container into an ultrasonic generator, carrying out ultrasonic treatment for 5-10min, after the ultrasonic treatment is finished, adding a mixture of nano silicon dioxide and isopropanol into the container, stirring for 30-40min by using a stirrer, heating water in the ultrasonic generator to 80-85 ℃, continuing the ultrasonic treatment for 30-35min, after the ultrasonic treatment is finished, putting the container into a vacuum oven with the temperature of 80-85 ℃, drying for 50-60min, and grinding and sieving the solid in the container to obtain modified nano titanium dioxide for later use;
the preparation method of the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer specifically comprises the following steps:
the method comprises the following steps: putting linear low-density polyethylene, low-density polyethylene and modified nano-silica into a container, uniformly mixing to obtain a mixed material, adding the mixed material into a kneading machine with the temperature and the rotating speed of 140-;
step two: starting a first heating sheet 19, a second heating sheet 20, a third heating sheet 21, a fourth heating sheet 22, a fifth heating sheet 23 and a die head heating sheet 24, wherein the heating temperatures of the first heating sheet 19, the second heating sheet 20, the third heating sheet 21, the fourth heating sheet 22, the fifth heating sheet 23 and the die head heating sheet 24 are respectively 125-140 ℃, 135-140 ℃, 145-150 ℃, 150-155 ℃ and 135-140 ℃, then adding the mixture into a feed inlet 5 of the single-screw extruder, starting a second motor 13 and setting the rotating speed of a rotating shaft of the second motor 13 to be 45-48r/min, wherein the second motor 13 drives a second belt pulley 11 to rotate through the rotating shaft, the second belt pulley 11 drives a first belt pulley 10 to rotate through a rotating belt 12, the first belt pulley 10 rotates to drive a rotating rod 14 to rotate, thereby the dwang 14 drives the first gear 15 to rotate, thereby the first gear 15 drives the second gear 16 to rotate, thereby the second gear 16 drives the connecting rod 17 to rotate, thereby the connecting rod 17 drives the extrusion screw 18 to rotate, the first motor 6 is started and the rotating shaft of the first motor 6 is set to rotate at a speed of 12-15r/min, thereby the first motor 6 drives the feeding screw 7 to rotate through the rotating shaft, thereby the feeding screw 7 rotates, thereby the mixture enters the extrusion pipe 4, the mixture is melted in the extrusion pipe 4, the melted mixture is continuously pushed to the die head 25 by the extrusion screw 18, finally the mixture is extruded from the die head 25 of the single screw extruder to be granulated to obtain mixed master batches, the mixed master batches are blown to be molded by a film blowing device, thus obtaining the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer for standby.
A preparation method of a high-temperature-resistant and light-aging-resistant PE film specifically comprises the following steps: and arranging nanometer titanium dioxide layers with the thickness of 10-15 mu m on the upper surface and the lower surface of the obtained modified nanometer silicon dioxide/linear low-density polyethylene/low-density polyethylene layer to obtain the high-temperature-resistant and light-aging-resistant PE film.
The single-screw extruder comprises a fixed frame 1, a support frame 2, a shell 3, an extrusion pipe 4 and a feed inlet 5, wherein a fixed base is arranged on the surface of the bottom inside the fixed frame 1, a second motor 13 is arranged on the surface of the top of the fixed base, a second belt pulley 11 is vertically arranged on the surface of the top of the rotating shaft end of the second motor 13, a support plate is arranged above the second motor 13, a support seat is arranged on one side of the surface of the top of the support plate, a gear box 9 is arranged on the surface of the top of the support seat, a circular opening is arranged on the surface of the side wall of one side of the gear box 9, a first bearing is arranged inside the circular opening, a rotating rod 14 is arranged inside the first bearing, a first belt pulley 10 is vertically welded on the surface of one end of the rotating rod 14, the first belt pulley 10 is rotatably connected with the second belt pulley 11 through a, a circular opening is also formed in the surface of the side wall of the other side of the gear box 9, a second bearing is arranged in the circular opening, a connecting rod 17 is arranged in the second bearing, a second gear 16 is perpendicularly welded on the surface of one end of the connecting rod 17, the second gear 16 is meshed with the first gear 15, a dust cover 8 is arranged above the gear box 9, an extrusion screw rod 18 is perpendicularly welded on the surface of the other end of the connecting rod 17, an extrusion pipe 4 is arranged outside the extrusion screw rod 18, the extrusion pipe 4 is arranged in the shell 3, an opening is formed in the upper portion of one end of the extrusion pipe 4, a feeding port 5 is arranged on the surface of the opening, a feeding screw rod 7 is arranged at the bottom of the feeding port 5, a first motor 6 is arranged on one side of the feeding port 5, the rotating shaft of the first motor 6 is fixedly welded with the feeding screw rod 7, first heating, The extrusion device comprises a second heating plate 20, a third heating plate 21, a fourth heating plate 22 and a fifth heating plate 23, wherein a die head 25 is installed at one end of the extrusion pipe 4, a die head heating plate 24 is installed between the die head 25 and the fifth heating plate 23, and the die head heating plate 24 is installed on the outer side of the extrusion pipe 4. The bottom of the feeding port 5 is provided with a feeding pipe, the feeding screw rod 7 is arranged inside the feeding pipe, the feeding screw rod 7 is rotatably connected with the feeding pipe, and the extruding screw rod 18 is rotatably connected with the extruding pipe 4.
Example 1
Referring to fig. 1-4, a high temperature resistant and light aging resistant PE film is divided into the following three layers from outside to inside: a nano titanium dioxide layer, a modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer and a nano titanium dioxide layer; the two nano titanium dioxide layers are both prepared from 12 parts by weight of nano titanium dioxide; the modified nano-silica/linear low-density polyethylene/low-density polyethylene layer is prepared from 6 parts by weight of modified nano-silica, 60 parts by weight of linear low-density polyethylene and 40 parts by weight of low-density polyethylene; the modified nano silicon dioxide is prepared from 9 parts by weight of nano silicon dioxide, 3 parts by weight of silane coupling agent and 26 parts by weight of isopropanol;
the preparation method of the modified nano silicon dioxide comprises the following steps:
adding isopropanol into nano silicon dioxide powder, and uniformly stirring by using a stirrer; then putting a silane coupling agent into a container, adding isopropanol to dissolve, putting the container into an ultrasonic generator, carrying out ultrasonic treatment for 8min, after the ultrasonic treatment is finished, adding a mixture of nano silicon dioxide and isopropanol into the container, stirring for 30min by using a stirrer, heating water in the ultrasonic generator to 82 ℃, continuing the ultrasonic treatment for 30min, after the ultrasonic treatment is finished, putting the container into a vacuum oven with the temperature of 85 ℃, drying for 55min, and grinding and sieving the solid in the container to obtain modified nano titanium dioxide for later use;
the preparation method of the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer specifically comprises the following steps:
the method comprises the following steps: putting linear low-density polyethylene, low-density polyethylene and modified nano-silica into a container, uniformly mixing to obtain a mixed material, adding the mixed material into a kneading machine with the temperature and the rotating speed of 145 ℃ and 45r/min respectively for melting and mixing, discharging after melting and mixing uniformly, and crushing again to obtain a mixed material;
step two: starting a first heating sheet 19, a second heating sheet 20, a third heating sheet 21, a fourth heating sheet 22, a fifth heating sheet 23 and a die head heating sheet 24, wherein the heating temperatures of the first heating sheet 19, the second heating sheet 20, the third heating sheet 21, the fourth heating sheet 22, the fifth heating sheet 23 and the die head heating sheet 24 are 125 ℃, 135 ℃, 140 ℃, 145 ℃, 150 ℃ and 140 ℃, respectively, adding the mixture into the feed port 5 of the single-screw extruder, starting a second motor 13 and setting the rotating speed of a rotating shaft of the second motor 13 to be 46r/min, driving the second belt pulley 11 to rotate through the rotating shaft of the second motor 13, driving the first belt pulley 10 to rotate through the rotating belt 12, driving the rotating rod 14 to rotate through the first belt pulley 10, driving the rotating rod 15 to rotate through the second belt pulley 15, driving the second gear 16 to rotate through the first gear 15, thereby the second gear 16 drives connecting rod 17 and rotates, thereby connecting rod 17 drives extrusion hob 18 and rotates, start first motor 6 and set up first motor 6 rotating shaft rotational speed and be 14r/min, thereby first motor 6 drives feeding hob 7 through its axis of rotation and rotates, thereby feeding hob 7 rotates thereby the compounding gets into inside the extrusion pipe 4, the mixture melts in extrusion pipe 4 inside, the molten mixture constantly is promoted to the die head 25 by extrusion hob 18, the mixture is extruded the granulation from single screw extruder's die head 25 and is got mixed master batch at last, use the blown film device to blow the film shaping with mixed master batch, obtain modified nanometer silica/linear low density polyethylene/low density polyethylene layer, it is reserve.
A preparation method of a high-temperature-resistant and light-aging-resistant PE film specifically comprises the following steps: arranging nanometer titanium dioxide layers with the thickness of 10-15 mu m on the upper and lower surfaces of the obtained modified nanometer silicon dioxide/linear low-density polyethylene/low-density polyethylene layer to obtain the high-temperature-resistant and light-aging-resistant PE film
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. The high-temperature-resistant and light-aging-resistant PE film is characterized by being divided into the following three layers from outside to inside: a nano titanium dioxide layer, a modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer and a nano titanium dioxide layer; the two nano titanium dioxide layers are respectively prepared from 10-15 parts by weight of nano titanium dioxide; the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer is prepared from 5-10 parts by weight of modified nano silicon dioxide, 30-60 parts by weight of linear low density polyethylene and 20-40 parts by weight of low density polyethylene; the modified nano silicon dioxide is prepared from 8-12 parts by weight of nano silicon dioxide, 1-5 parts by weight of silane coupling agent and 20-35 parts by weight of isopropanol;
the preparation method of the modified nano silicon dioxide comprises the following steps:
adding isopropanol into nano silicon dioxide powder, and uniformly stirring by using a stirrer; then putting a silane coupling agent into a container, adding isopropanol to dissolve, putting the container into an ultrasonic generator, carrying out ultrasonic treatment for 5-10min, after the ultrasonic treatment is finished, adding a mixture of nano silicon dioxide and isopropanol into the container, stirring for 30-40min by using a stirrer, heating water in the ultrasonic generator to 80-85 ℃, continuing the ultrasonic treatment for 30-35min, after the ultrasonic treatment is finished, putting the container into a vacuum oven with the temperature of 80-85 ℃, drying for 50-60min, and grinding and sieving the solid in the container to obtain modified nano titanium dioxide for later use;
the preparation method of the modified nano silicon dioxide/linear low density polyethylene/low density polyethylene layer specifically comprises the following steps:
the method comprises the following steps: putting linear low-density polyethylene, low-density polyethylene and modified nano-silica into a container, uniformly mixing to obtain a mixed material, adding the mixed material into a kneading machine with the temperature and the rotating speed of 140-;
step two: starting a first heating sheet (19), a second heating sheet (20), a third heating sheet (21), a fourth heating sheet (22), a fifth heating sheet (23) and a die head heating sheet (24), wherein the heating temperatures of the first heating sheet (19), the second heating sheet (20), the third heating sheet (21), the fourth heating sheet (22), the fifth heating sheet (23) and the die head heating sheet (24) are respectively 125-, the first belt pulley (10) rotates to drive the rotating rod (14) to rotate, the rotating rod (14) drives the first gear (15) to rotate, the first gear (15) drives the second gear (16) to rotate, the second gear (16) drives the connecting rod (17) to rotate, the connecting rod (17) drives the extrusion screw rod (18) to rotate, the first motor (6) is started and the rotating shaft of the first motor (6) is set to rotate at a speed of 12-15r/min, the first motor (6) drives the feeding screw rod (7) to rotate through the rotating shaft of the first motor, the feeding screw rod (7) rotates to mix materials to enter the extrusion pipe (4), the mix materials are melted in the extrusion pipe (4), the melted mix materials are continuously pushed to the die head (25) by the extrusion screw rod (18), and finally the mix materials are extruded from the die head (25) of the single-screw extruder to be granulated to obtain mixed master batches, and (3) performing film blowing molding on the mixed master batch by using a film blowing device to obtain a modified nano silicon dioxide/linear low-density polyethylene/low-density polyethylene layer for later use.
2. The preparation method of the high-temperature-resistant and light-aging-resistant PE film is characterized by comprising the following steps of: and arranging nanometer titanium dioxide layers with the thickness of 10-15 mu m on the upper surface and the lower surface of the obtained modified nanometer silicon dioxide/linear low-density polyethylene/low-density polyethylene layer to obtain the high-temperature-resistant and light-aging-resistant PE film.
3. The PE film with high temperature resistance and light aging resistance as claimed in claim 1, wherein the single screw extruder comprises a fixing frame (1), a supporting frame (2), a shell (3), an extrusion pipe (4) and a feeding hole (5), a fixed base is installed on the surface of the bottom inside the fixing frame (1), a second motor (13) is installed on the surface of the top of the fixed base, a second belt pulley (11) is vertically installed on the surface of the top of one end of a rotating shaft of the second motor (13), a supporting plate is installed above the second motor (13), a supporting seat is installed on one side of the surface of the top of the supporting plate, a gear box (9) is installed on the surface of the top of the supporting seat, a circular opening is arranged on the surface of the side wall of one side of the gear box (9), a first bearing is installed inside the circular opening, a rotating rod (14) is installed inside the first bearing, the utility model discloses a gearbox, including dwang (14), dwang (14) one end on the surface vertical welding have first belt pulley (10), rotate through rotating belt (12) between first belt pulley (10) and second belt pulley (11) and be connected, the dwang (14) other end on the surface vertical welding have first gear (15), the lateral wall of gear box (9) opposite side is provided with round opening and round opening internally mounted on the surface equally and has the second bearing, second bearing internally mounted has connecting rod (17), the connecting rod (17) one end on the surface vertical welding have second gear (16), mesh between second gear (16) and first gear (15), dust cover (8) are installed to the top of gear box (9), the connecting rod (17) other end on the surface vertical welding have extrusion hob (18), extrude hob (18) outside and install extrusion pipe (4), the extrusion pipe (4) is arranged in the shell (3), an opening is arranged above one end of the extrusion pipe (4), a feed inlet (5) is arranged on the surface of the opening, a feed screw rod (7) is arranged at the bottom of the feed inlet (5), a first motor (6) is arranged on one side of the feeding hole (5), a rotating shaft of the first motor (6) is fixed with the feeding screw rod (7) by welding, a first heating plate (19), a second heating plate (20), a third heating plate (21), a fourth heating plate (22) and a fifth heating plate (23) are sequentially arranged from one end to the other end of the outer side of the extrusion pipe (4), a die head (25) is installed at one end of the extrusion pipe (4), a die head heating sheet (24) is installed between the die head (25) and the fifth heating sheet (23), and the die head heating sheet (24) is installed on the outer side of the extrusion pipe (4).
4. The PE film with high temperature resistance and light aging resistance as recited in claim 3, wherein a feeding pipe is arranged at the bottom of the feeding hole (5), the feeding screw rod (7) is installed inside the feeding pipe, and the feeding screw rod (7) is rotatably connected with the feeding pipe.
5. The PE film with high temperature resistance and light aging resistance as recited in claim 3, wherein the extrusion screw rod (18) is rotatably connected with the extrusion pipe (4).
CN202010231408.5A 2020-03-27 2020-03-27 High-temperature-resistant and light-aging-resistant PE film and preparation method thereof Pending CN111361232A (en)

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Application publication date: 20200703