CN111430645A - PE and PTFE composite diaphragm and preparation method thereof - Google Patents

PE and PTFE composite diaphragm and preparation method thereof Download PDF

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Publication number
CN111430645A
CN111430645A CN202010239468.1A CN202010239468A CN111430645A CN 111430645 A CN111430645 A CN 111430645A CN 202010239468 A CN202010239468 A CN 202010239468A CN 111430645 A CN111430645 A CN 111430645A
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composite
film
ptfe
roller
rolling
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Chinese (zh)
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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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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/02—Chemical treatment or coating of shaped articles made of macromolecular substances with solvents, e.g. swelling agents
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—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 a halogen; Derivatives of such polymers
    • C08J2327/02—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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • 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
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
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  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a PE and PTFE composite diaphragm and a preparation method thereof, wherein the composite diaphragm comprises a PE film and a PTFE film, and the PE film comprises the following raw materials in parts by weight: 80-100 parts of low-density polyethylene, 25-30 parts of metallocene linear low-density polyethylene, 20-26 parts of thermoplastic polyurethane elastomer, 1.2-1.8 parts of calcium-zinc stabilizer, 0.8-1.4 parts of antioxidant, 8-12 parts of modified silicon carbide, 2-4 parts of silicic acid polymer powder, 2-4 parts of talcum powder and 1-3 parts of modified mica powder.

Description

PE and PTFE composite diaphragm and preparation method thereof
Technical Field
The invention relates to the technical field of composite film processing, in particular to a PE and PTFE composite diaphragm and a preparation method thereof.
Background
In lithium battery construction, the separator is one of the key internal layer components. When the lithium ion battery is in charge-discharge circulation, the battery diaphragm can prevent the contact of the positive electrode and the negative electrode of the battery, so that the short circuit of the battery is prevented, and meanwhile, the porous structure can ensure the rapid passing of lithium ions. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery. However, the existing diaphragm is usually a polyolefin or polyethylene diaphragm, and is widely used for lithium ion battery diaphragms due to the characteristics of low price, good chemical stability and thermal stability, and the like, but the diaphragm material has poor affinity with an electrolyte organic solvent, so that the electrolyte retention capacity is poor, and certain influence is caused on the service performance of the battery. Although the polytetrafluoroethylene membrane has high thermal stability and good chemical corrosion resistance, due to the highly symmetrical structure of PTFE, the surface energy of the PTFE is too low, so that the polymer has strong lyophobic property, and the application of the polymer in the lithium battery diaphragm industry is hindered.
The publication number is: the patent of CN108305980A discloses a lithium ion battery composite diaphragm and a preparation method thereof, which, compared with the present application, cannot solve the problems proposed in the present application: the existing diaphragm is usually a polyolefin or polyethylene diaphragm, and is widely used for lithium ion battery diaphragms due to the characteristics of low price, good chemical stability and thermal stability, but the diaphragm material has poor affinity with an electrolyte organic solvent, so that the electrolyte retention capacity is poor, and certain influence is caused on the service performance of the battery. Although the polytetrafluoroethylene membrane has high thermal stability and good chemical corrosion resistance, due to the highly symmetrical structure of PTFE, the surface energy of the PTFE is too low, so that the polymer has strong lyophobic property, and the application of the polymer in the lithium battery diaphragm industry is hindered.
Disclosure of Invention
The invention aims to provide a PE and PTFE composite diaphragm and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the composite membrane of PE and PTFE comprises a PE membrane and a PTFE membrane, and is a laminated structure of the PE membrane/the PTFE membrane/the PE membrane or the PTFE membrane/the PE membrane/the PTFE membrane, wherein the PE membrane comprises the following raw materials in parts by weight: 80-100 parts of low-density polyethylene, 25-30 parts of metallocene linear low-density polyethylene, 20-26 parts of thermoplastic polyurethane elastomer, 1.2-1.8 parts of calcium-zinc stabilizer, 0.8-1.4 parts of antioxidant, 8-12 parts of modified silicon carbide, 2-4 parts of silicic acid polymer powder, 2-4 parts of talcum powder and 1-3 parts of modified mica powder;
the preparation method of the PE film comprises the following steps:
s11: weighing talcum powder and modified mica powder, putting into a stirrer, and stirring and mixing to obtain a mixture A;
s12: weighing modified silicon carbide and silicic acid polymer powder, adding into the mixture A, and continuously stirring and mixing to obtain a mixture B;
s13: weighing a thermoplastic polyurethane elastomer, adding the thermoplastic polyurethane elastomer into the mixture B, and continuously stirring and mixing to obtain a mixture C;
s14: weighing low-density polyethylene and metallocene linear low-density polyethylene, putting into a mixer, stirring, mixing and discharging to obtain a mixture D;
s15: putting the mixture C, the mixture D, a calcium-zinc stabilizer and an antioxidant into an internal mixer, carrying out internal mixing treatment and discharging to obtain a mixture E, and feeding the mixture E into a film blowing machine to blow a film to obtain a PE film;
the preparation method of the PTFE membrane comprises the following steps:
s21: placing PTFE resin and a lubricant in a high-temperature mixer for mixing and curing to obtain a molten material H;
s22: extruding and molding the molten material H obtained in the step S21 through extruder equipment to obtain a membrane material G;
s23: and (3) longitudinally stretching the membrane material G obtained in the step (S22) at the temperature of 180-350 ℃ to prepare a base membrane, and then stretching the base membrane on a transverse stretcher to form the biaxially stretched PTFE membrane.
A preparation method of a PE and PTFE composite diaphragm comprises the following steps:
s31: soaking the PE film in a modified solution at 40-90 deg.C for 15-50min, wherein the modified solution is one or more of petroleum ether, gasoline, and kerosene, taking out the PE film, and vacuum drying;
s32: soaking the fully cleaned PTFE membrane in hydrophilic modification liquid for hydrophilic modification, taking out the PTFE membrane after soaking modification for 30-90 min, cleaning with deionized water, and drying in vacuum for later use;
s33: the PE film dried and reserved in the S31 and the PTFE film dried and reserved in the S32 are compounded through a rolling compounding device, the PE film or the PTFE film is wound on a first feeding roller, a second feeding roller and a third feeding roller respectively, the type of the film on the second feeding roller is different from that of the film on the first feeding roller and the third feeding roller, the PE film or the PTFE film on the first feeding roller sequentially enters a rolling mechanism under the guiding action of the first guide roller and the second guide roller, the PTFE film or the PE film on the second feeding roller enters the rolling mechanism under the guiding action of the second guide roller, the PE film or the PTFE film on the third feeding roller enters the rolling mechanism, a first motor works to drive a driving chain wheel to rotate, the driving chain wheel drives a driven chain wheel to rotate through a chain, so as to drive a rotating roller to rotate to convey the composite film, a rotating adjusting bolt drives an upper pressing roller to move downwards along a sliding rail, and roll the three-layer composite film, the composite film preliminarily rolled by the rolling mechanism enters the composite rolling box body, the air cylinder drives the connecting frame to move downwards, the composite film is tightly pressed on the composite rolling platform through the composite rolling roller, the protective pad arranged outside the composite rolling roller and on the composite rolling platform plays a role in protecting the composite film, the electric heater works to heat the composite rolling platform, the second motor works to drive the screw to rotate, the sliding seat is driven to reciprocate along the guide rod by the screw rod transmission principle, the composite film on the composite rolling platform is rolled in a reciprocating manner, the electric heater heats the composite rolling platform to improve the composite effect of the film, in the composite rolling process of the composite film, the fan works to blow air into the composite rolling box body, the air filter filters the air blown into the composite rolling box body, and the cleanliness of the air blown into the composite rolling box body is effectively ensured, the composite film is blown and dried while the composite effect is improved, the rolled composite film is wound on a material receiving roller, and a third motor works to drive the material receiving roller to rotate to automatically wind the composite film;
s34: and (4) taking out the PE and PTFE composite membrane in the step S33, drying in a sealed clean constant-temperature drying oven, and cutting into a finished product after drying to obtain the PE and PTFE composite membrane.
Preferably, the rolling and compounding device comprises a rack, a rolling mechanism, a compound rolling box body, a compound rolling platform and a sliding seat; the feeding device comprises a rack, a first support, a second support and a third support, wherein the left side of the rack is fixedly connected with the first support, the right side of the rack is fixedly connected with a fifth support, the fifth support is rotatably connected with a receiving roller, the first support is rotatably connected with a first feeding roller, the second support is rotatably connected with a second feeding roller and a first guide roller, the second support is positioned between the first support and the third support, and the third support is rotatably connected with a third feeding roller and a second guide roller;
the rolling mechanism comprises a fourth bracket, a connecting bearing, a rotating roller, a pressing roller seat and a motor mounting plate; the fourth support is fixedly connected to the rack, two groups of the fourth support are symmetrically arranged, a sliding rail is arranged on the upper portion of the fourth support, the compression roller seat is connected to the sliding rail in a vertical sliding mode, an upper compression roller is connected to the compression roller seat in a rotating mode, an adjusting bolt is connected to the upper end of the compression roller seat in a rotating mode, the adjusting bolt is in threaded connection with the fourth support, the connecting bearing is fixedly connected to the fourth support, connecting shafts are arranged at two ends of the rotating roller, the rotating roller is located between the two groups of the fourth support and below the upper compression roller, the connecting shafts are fixedly connected to the inner ring of the connecting bearing, a driven sprocket is fixedly connected to the connecting bearing at one end, the motor mounting plate is fixedly connected to the rack, a first motor is fixedly mounted on the motor mounting plate, and a driving sprocket is connected to the output end of, the driving chain wheel is meshed with a chain, and the chain is meshed with the driven chain wheel;
the compound roll-in box fixed mounting be in the frame, compound roll-in platform is connected in the frame and be located in the compound roll-in box, compound roll-in platform below is provided with electric heater, the horizontal sliding connection of sliding seat is in the compound roll-in box, vertical decurrent cylinder is installed to the sliding seat lower extreme, be provided with the cylinder telescopic link on the cylinder, be connected with the link on the cylinder telescopic link, it is connected with compound compression roller to rotate on the link.
Preferably, the second motor is fixedly installed on the side wall of the composite rolling box body, the output end of the second motor is connected with a screw rod, the screw rod stretches into the composite rolling box body and is rotatably connected to the side wall of the composite rolling box body, a guide rod is fixedly connected to the inside of the composite rolling box body and is parallel to the screw rod, and the sliding seat is in threaded connection with the screw rod and is in sliding connection with the guide rod.
Preferably, the link is last to rotate and to be connected with two sets of at least compound compression rollers, compound compression roller periphery cover is equipped with the protection and fills up, laid on the compound roll-in platform upper end the protection is filled up.
Preferably, the composite rolling box body is provided with a fan, the fan air outlet is provided with a connecting pipe, the connecting pipe stretches into the composite rolling box body, an electric heating net is arranged in the composite rolling box body, and the electric heating net is located below the connecting pipe.
Preferably, an air filter is installed on the composite rolling box body, an air inlet of the air filter is connected with an air outlet of the fan, and the air outlet of the air filter is connected with the connecting pipe.
Preferably, the side walls of the front end and the rear end of the composite rolling box body are respectively provided with an observation window, and transparent toughened glass is hermetically arranged outside the observation windows.
Preferably, a third motor is fixedly mounted on the fifth support, and the third motor is connected with the material receiving roller.
The invention has the beneficial effects that: the PE film and the PTFE film are compounded to form the composite diaphragm, so that the composite diaphragm has the cultural stability and the thermal stability of the polyethylene diaphragm and the chemical corrosion resistance of the polytetrafluoroethylene diaphragm, and the overall performance of the composite film is improved to adapt to the application in the lithium battery industry;
the PE film or the PTFE film is respectively wound on a first feeding roller, a second feeding roller and a third feeding roller, the type of the film on the second feeding roller is different from that of the film on the first feeding roller and the third feeding roller, so that the composite diaphragm can be ensured to be compounded in a laminated structure of the PE film/the PTFE film/the PE film or the PTFE film/the PE film/the PTFE film, the PE film or the PTFE film on the first feeding roller sequentially enters a rolling mechanism under the guiding action of the first guide roller and the second guide roller, the PTFE film or the PE film on the second feeding roller enters the rolling mechanism under the guiding action of the second guide roller, the PE film or the PTFE film on the third feeding roller enters the rolling mechanism, the first motor works to drive a driving sprocket wheel to rotate, the driving sprocket wheel drives a driven sprocket wheel to rotate through a chain, so as to drive a rotating roller to rotate to convey the composite film, a rotating adjusting bolt drives an upper pressing roller to move downwards along a sliding rail, the three-layer composite film is rolled, the composite film primarily rolled by the rolling mechanism enters the composite rolling box body, the air cylinder drives the connecting frame to move downwards, the composite film is tightly pressed on the composite rolling platform through the composite rolling roller, the protective pads arranged outside the composite rolling roller and on the composite rolling platform play a role in protecting the composite film, the electric heater works to heat the composite rolling platform, the second motor works to drive the screw rod to rotate, the sliding seat is driven to reciprocate along the guide rod by the lead screw transmission principle, the composite film on the composite rolling platform is rolled in a reciprocating manner, the electric heater heats the composite rolling platform to improve the composite effect of the film, in the composite rolling process of the composite film, the fan works to blow air into the composite rolling box body, the air filter filters the air blown into the composite rolling box body, and the cleanliness of the air blown into the composite rolling box body is effectively ensured, thereby avoid the dust debris in the air to compound the production influence of membrane, the air that blows in the compound roll-in box heats under the effect of electrical heating net, the air after the heating blows in the complex film upper surface, heat of blowing to the complex film upper surface, blow the drying to the complex film when improving compound effect, the complex film rolling after the roll-in shaping is on the receipts material roller, third motor work drives receipts material roller and rotates and carry out the automatic winding to the complex film, can effectively improve rolling efficiency.
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 the present invention;
FIG. 2 is a schematic view of the internal structure of the composite roll housing of the present invention;
FIG. 3 is a side view of the rolling mechanism of the present invention;
FIG. 4 is a schematic structural view of the rolling mechanism of the present invention;
FIG. 5 is an isometric view of FIG. 4 of the present invention;
FIG. 6 is a side view of a fifth bracket of the present invention;
in the figure: 1. a frame; 2. a first bracket; 3. a first feeding roller; 4. a second bracket; 5. a second feeding roller; 6. a first guide roller; 7. a third support; 71. a third feed roller; 8. a second guide roller; 9. a rolling mechanism; 10. a fourth bracket; 11. connecting a bearing; 12. a rotating roller; 13. a slide rail; 14. a press roller seat; 15. adjusting the bolt; 16. an upper compression roller; 17. a connecting shaft; 18. a driven sprocket; 19. a motor mounting plate; 20. a first motor; 21. a drive sprocket; 22. a chain; 23. compounding a rolling box body; 24. an observation window; 25. an electric heater; 26. a composite rolling table; 27. a second motor; 28. a screw; 29. a guide bar; 30. a sliding seat; 31. a cylinder; 32. a connecting frame; 33. compounding press rolls; 34. a protective pad; 35. a fifth support; 36. a third motor; 37. a material receiving roller; 38. a fan; 39. an air filter; 40. a connecting pipe; 41. an electric heating net.
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.
The implementation benefit is as follows:
a PE and PTFE composite diaphragm comprises a PE film and a PTFE film, the composite diaphragm is a laminated structure of the PE film/the PTFE film/the PE film or the PTFE film/the PE film/the PTFE film, and the PE film comprises the following raw materials in parts by weight: 80 parts of low-density polyethylene, 25 parts of metallocene linear low-density polyethylene, 20 parts of thermoplastic polyurethane elastomer, 1.2 parts of calcium-zinc stabilizer, 0.8 part of antioxidant, 8 parts of modified silicon carbide, 2 parts of silicic acid polymer powder, 2 parts of talcum powder and 1 part of modified mica powder;
the preparation method of the PE film comprises the following steps:
s11: weighing talcum powder and modified mica powder, putting into a stirrer, and stirring and mixing to obtain a mixture A;
s12: weighing modified silicon carbide and silicic acid polymer powder, adding into the mixture A, and continuously stirring and mixing to obtain a mixture B;
s13: weighing a thermoplastic polyurethane elastomer, adding the thermoplastic polyurethane elastomer into the mixture B, and continuously stirring and mixing to obtain a mixture C;
s14: weighing low-density polyethylene and metallocene linear low-density polyethylene, putting into a mixer, stirring, mixing and discharging to obtain a mixture D;
s15: putting the mixture C, the mixture D, a calcium-zinc stabilizer and an antioxidant into an internal mixer, carrying out internal mixing treatment and discharging to obtain a mixture E, and feeding the mixture E into a film blowing machine to blow a film to obtain a PE film;
the preparation method of the PTFE membrane comprises the following steps:
s21: placing PTFE resin and a lubricant in a high-temperature mixer for mixing and curing to obtain a molten material H;
s22: extruding and molding the molten material H obtained in the step S21 through extruder equipment to obtain a membrane material G;
s23: and (3) longitudinally stretching the membrane material G obtained in the step (S22) at the temperature of 180-350 ℃ to prepare a base membrane, and then stretching the base membrane on a transverse stretcher to form the biaxially stretched PTFE membrane.
A preparation method of a PE and PTFE composite diaphragm comprises the following steps:
s31: soaking the PE film in a modified solution at 40-90 deg.C for 15-50min, wherein the modified solution is one or more of petroleum ether, gasoline, and kerosene, taking out the PE film, and vacuum drying;
s32: soaking the fully cleaned PTFE membrane in hydrophilic modification liquid for hydrophilic modification, taking out the PTFE membrane after soaking modification for 30-90 min, cleaning with deionized water, and drying in vacuum for later use;
s33: the PE film dried and reserved in the S31 and the PTFE film dried and reserved in the S32 are compounded through a rolling compounding device, the PE film or the PTFE film is wound on a first feeding roller 3, a second feeding roller 5 and a third feeding roller 71 respectively, the type of the film on the second feeding roller 5 is different from that of the film on the first feeding roller and the third feeding roller, the PE film or the PTFE film on the first feeding roller 3 sequentially enters a rolling mechanism 9 under the guiding action of a first guide roller 6 and a second guide roller 8, the PTFE film or the PE film on the second feeding roller 5 enters the rolling mechanism 9 under the guiding action of the second guide roller 8, the PE film or the PTFE film on the third feeding roller 71 enters the rolling mechanism 9, a first motor 20 works to drive a driving sprocket 21 to rotate, the driving sprocket 21 drives a driven sprocket 18 to rotate through a chain 22, so as to drive a rotating roller 12 to rotate to convey the composite film, a rotating adjusting bolt 15 drives an upper pressing roller 16 to move downwards along a sliding rail 13, the three-layer composite film is rolled, the composite film primarily rolled by the rolling mechanism 9 enters the composite rolling box body 23, the air cylinder 31 drives the connecting frame 32 to move downwards, the composite film is tightly pressed on the composite rolling platform 26 through the composite pressing roller 33, the protective pad 34 arranged outside the composite pressing roller 33 and on the composite rolling platform 26 plays a role in protecting the composite film, the electric heater 25 works to heat the composite rolling platform 26, the second motor 27 works to drive the screw 28 to rotate, the sliding seat 30 is driven to reciprocate along the guide rod 29 through the lead screw transmission principle, the reciprocating rolling of the composite film on the composite rolling platform 26 is realized, the electric heater 25 heats the composite rolling platform 26 to improve the composite effect of the film, the fan 38 works to blow air into the composite rolling box body 23 in the composite film rolling and compounding process, the air filter 39 filters the air blown into the composite rolling box body 23, the cleanliness of air blown into the composite rolling box body 23 is effectively ensured, so that the influence of dust impurities in the air on the compounding of the composite film is avoided, the air blown into the composite rolling box body 23 is heated under the action of the electric heating net 41, the heated air is blown into the upper surface of the composite film to blow and heat the upper surface of the composite film, the composite film is blown and dried while the compounding effect is improved, the rolled and molded composite film is wound on the material receiving roller 37, and the third motor 36 operates to drive the material receiving roller 37 to rotate to automatically wind the composite film;
s34: and (4) taking out the PE and PTFE composite membrane in the step S33, drying in a sealed clean constant-temperature drying oven, and cutting into a finished product after drying to obtain the PE and PTFE composite membrane.
Referring to fig. 1-6, the rolling and laminating apparatus includes a frame 1, a rolling mechanism 9, a laminating rolling box 23, a laminating rolling table 26 and a sliding seat 30; the left side of the rack 1 is fixedly connected with a first support 2, a second support 4 and a third support 7, the right side of the rack 1 is fixedly connected with a fifth support 35, the fifth support 35 is rotatably connected with a material receiving roller 37, the first support 2 is rotatably connected with a first feeding roller 3, the second support 4 is rotatably connected with a second feeding roller 5 and a first guide roller 6, the second support 4 is positioned between the first support 2 and the third support 7, and the third support 7 is rotatably connected with a third feeding roller 71 and a second guide roller 8;
the rolling mechanism 9 comprises a fourth bracket 10, a connecting bearing 11, a rotating roller 12, a rolling roller seat 14 and a motor mounting plate 19; the fourth support 10 is fixedly connected to the frame 1, two sets of the fourth support 10 are symmetrically arranged, a slide rail 13 is arranged on the upper portion of the fourth support 10, a compression roller seat 14 is connected to the slide rail 13 in an up-and-down sliding manner, an upper compression roller 16 is connected to the compression roller seat 14 in a rotating manner, an adjusting bolt 15 is connected to the upper end of the compression roller seat 14 in a rotating manner, the adjusting bolt 15 is in threaded connection with the fourth support 10, a connecting bearing 11 is fixedly connected to the fourth support 10, connecting shafts 17 are arranged at two ends of a rotating roller 12, the rotating roller 12 is positioned between the two sets of the fourth support 10 and below the upper compression roller 16, the connecting shafts 17 are fixedly connected to the inner ring of the connecting bearing 11, a driven sprocket 18 is fixedly connected to the connecting bearing 11 at one end, a motor mounting plate 19 is fixedly connected to the frame 1, a first motor 20 is fixedly mounted on the motor mounting plate, the chain 22 is meshed with the driven chain wheel 18;
compound roll-in box 23 fixed mounting is in frame 1, compound roll-in platform 26 is connected on frame 1 and is located compound roll-in box 23, compound roll-in platform 26 below is provided with electric heater 25, the horizontal sliding connection of sliding seat 30 is in compound roll-in box 23, vertical decurrent cylinder 31 is installed to the sliding seat 30 lower extreme, be provided with the cylinder telescopic link on the cylinder 31, be connected with link 32 on the cylinder telescopic link, it is connected with compound compression roller 33 to rotate on the link 32.
The side wall of the composite rolling box body 23 is fixedly provided with a second motor 27, the output end of the second motor 27 is connected with a screw 28, the screw 28 extends into the composite rolling box body 23 and is rotatably connected to the side wall of the composite rolling box body 23, a guide rod 29 is fixedly connected in the composite rolling box body 23, the guide rod 29 is parallel to the screw 28, and a sliding seat 30 is in threaded connection with the screw 28 and is in sliding connection with the guide rod 29.
At least two groups of composite compression rollers 33 are rotatably connected to the connecting frame 32, protective pads 34 are sleeved on the peripheries of the composite compression rollers 33, and the protective pads 34 are laid at the upper ends of the composite compression tables 26.
The composite rolling box body 23 is provided with a fan 38, an air outlet of the fan 38 is provided with a connecting pipe 40, the connecting pipe 40 extends into the composite rolling box body 23, an electric heating net 41 is arranged in the composite rolling box body 23, and the electric heating net 41 is positioned below the connecting pipe 40.
The composite rolling box body 23 is provided with an air filter 39, an air inlet of the air filter 39 is connected with an air outlet of the fan 38, and an air outlet of the air filter 39 is connected with a connecting pipe 40.
The side walls of the front end and the rear end of the composite rolling box body 23 are respectively provided with an observation window 24, and the observation windows 24 are hermetically provided with transparent toughened glass.
A third motor 36 is fixedly mounted on the fifth bracket 35, and the third motor 36 is connected with the material receiving roller 37.
The implementation benefit II:
a PE and PTFE composite diaphragm comprises a PE film and a PTFE film, the composite diaphragm is a laminated structure of the PE film/the PTFE film/the PE film or the PTFE film/the PE film/the PTFE film, and the PE film comprises the following raw materials in parts by weight: 90 parts of low-density polyethylene, 27 parts of metallocene linear low-density polyethylene, 23 parts of thermoplastic polyurethane elastomer, 1.5 parts of calcium-zinc stabilizer, 1.1 parts of antioxidant, 10 parts of modified silicon carbide, 3 parts of silicic acid polymer powder, 3 parts of talcum powder and 2 parts of modified mica powder;
the preparation method of the PE film comprises the following steps:
s11: weighing talcum powder and modified mica powder, putting into a stirrer, and stirring and mixing to obtain a mixture A;
s12: weighing modified silicon carbide and silicic acid polymer powder, adding into the mixture A, and continuously stirring and mixing to obtain a mixture B;
s13: weighing a thermoplastic polyurethane elastomer, adding the thermoplastic polyurethane elastomer into the mixture B, and continuously stirring and mixing to obtain a mixture C;
s14: weighing low-density polyethylene and metallocene linear low-density polyethylene, putting into a mixer, stirring, mixing and discharging to obtain a mixture D;
s15: putting the mixture C, the mixture D, a calcium-zinc stabilizer and an antioxidant into an internal mixer, carrying out internal mixing treatment and discharging to obtain a mixture E, and feeding the mixture E into a film blowing machine to blow a film to obtain a PE film;
the preparation method of the PTFE membrane comprises the following steps:
s21: placing PTFE resin and a lubricant in a high-temperature mixer for mixing and curing to obtain a molten material H;
s22: extruding and molding the molten material H obtained in the step S21 through extruder equipment to obtain a membrane material G;
s23: and (3) longitudinally stretching the membrane material G obtained in the step (S22) at the temperature of 180-350 ℃ to prepare a base membrane, and then stretching the base membrane on a transverse stretcher to form the biaxially stretched PTFE membrane.
A preparation method of a PE and PTFE composite diaphragm comprises the following steps:
s31: soaking the PE film in a modified solution at 40-90 deg.C for 15-50min, wherein the modified solution is one or more of petroleum ether, gasoline, and kerosene, taking out the PE film, and vacuum drying;
s32: soaking the fully cleaned PTFE membrane in hydrophilic modification liquid for hydrophilic modification, taking out the PTFE membrane after soaking modification for 30-90 min, cleaning with deionized water, and drying in vacuum for later use;
s33: the PE film dried and reserved in the S31 and the PTFE film dried and reserved in the S32 are compounded through a rolling compounding device, the PE film or the PTFE film is wound on a first feeding roller 3, a second feeding roller 5 and a third feeding roller 71 respectively, the type of the film on the second feeding roller 5 is different from that of the film on the first feeding roller and the third feeding roller, the PE film or the PTFE film on the first feeding roller 3 sequentially enters a rolling mechanism 9 under the guiding action of a first guide roller 6 and a second guide roller 8, the PTFE film or the PE film on the second feeding roller 5 enters the rolling mechanism 9 under the guiding action of the second guide roller 8, the PE film or the PTFE film on the third feeding roller 71 enters the rolling mechanism 9, a first motor 20 works to drive a driving sprocket 21 to rotate, the driving sprocket 21 drives a driven sprocket 18 to rotate through a chain 22, so as to drive a rotating roller 12 to rotate to convey the composite film, a rotating adjusting bolt 15 drives an upper pressing roller 16 to move downwards along a sliding rail 13, the three-layer composite film is rolled, the composite film primarily rolled by the rolling mechanism 9 enters the composite rolling box body 23, the air cylinder 31 drives the connecting frame 32 to move downwards, the composite film is tightly pressed on the composite rolling platform 26 through the composite pressing roller 33, the protective pad 34 arranged outside the composite pressing roller 33 and on the composite rolling platform 26 plays a role in protecting the composite film, the electric heater 25 works to heat the composite rolling platform 26, the second motor 27 works to drive the screw 28 to rotate, the sliding seat 30 is driven to reciprocate along the guide rod 29 through the lead screw transmission principle, the reciprocating rolling of the composite film on the composite rolling platform 26 is realized, the electric heater 25 heats the composite rolling platform 26 to improve the composite effect of the film, the fan 38 works to blow air into the composite rolling box body 23 in the composite film rolling and compounding process, the air filter 39 filters the air blown into the composite rolling box body 23, the cleanliness of air blown into the composite rolling box body 23 is effectively ensured, so that the influence of dust impurities in the air on the compounding of the composite film is avoided, the air blown into the composite rolling box body 23 is heated under the action of the electric heating net 41, the heated air is blown into the upper surface of the composite film to blow and heat the upper surface of the composite film, the composite film is blown and dried while the compounding effect is improved, the rolled and molded composite film is wound on the material receiving roller 37, and the third motor 36 operates to drive the material receiving roller 37 to rotate to automatically wind the composite film;
s34: and (4) taking out the PE and PTFE composite membrane in the step S33, drying in a sealed clean constant-temperature drying oven, and cutting into a finished product after drying to obtain the PE and PTFE composite membrane.
Referring to fig. 1-6, the rolling and laminating apparatus includes a frame 1, a rolling mechanism 9, a laminating rolling box 23, a laminating rolling table 26 and a sliding seat 30; the left side of the rack 1 is fixedly connected with a first support 2, a second support 4 and a third support 7, the right side of the rack 1 is fixedly connected with a fifth support 35, the fifth support 35 is rotatably connected with a material receiving roller 37, the first support 2 is rotatably connected with a first feeding roller 3, the second support 4 is rotatably connected with a second feeding roller 5 and a first guide roller 6, the second support 4 is positioned between the first support 2 and the third support 7, and the third support 7 is rotatably connected with a third feeding roller 71 and a second guide roller 8;
the rolling mechanism 9 comprises a fourth bracket 10, a connecting bearing 11, a rotating roller 12, a rolling roller seat 14 and a motor mounting plate 19; the fourth support 10 is fixedly connected to the frame 1, two sets of the fourth support 10 are symmetrically arranged, a slide rail 13 is arranged on the upper portion of the fourth support 10, a compression roller seat 14 is connected to the slide rail 13 in an up-and-down sliding manner, an upper compression roller 16 is connected to the compression roller seat 14 in a rotating manner, an adjusting bolt 15 is connected to the upper end of the compression roller seat 14 in a rotating manner, the adjusting bolt 15 is in threaded connection with the fourth support 10, a connecting bearing 11 is fixedly connected to the fourth support 10, connecting shafts 17 are arranged at two ends of a rotating roller 12, the rotating roller 12 is positioned between the two sets of the fourth support 10 and below the upper compression roller 16, the connecting shafts 17 are fixedly connected to the inner ring of the connecting bearing 11, a driven sprocket 18 is fixedly connected to the connecting bearing 11 at one end, a motor mounting plate 19 is fixedly connected to the frame 1, a first motor 20 is fixedly mounted on the motor mounting plate, the chain 22 is meshed with the driven chain wheel 18;
compound roll-in box 23 fixed mounting is in frame 1, compound roll-in platform 26 is connected on frame 1 and is located compound roll-in box 23, compound roll-in platform 26 below is provided with electric heater 25, the horizontal sliding connection of sliding seat 30 is in compound roll-in box 23, vertical decurrent cylinder 31 is installed to the sliding seat 30 lower extreme, be provided with the cylinder telescopic link on the cylinder 31, be connected with link 32 on the cylinder telescopic link, it is connected with compound compression roller 33 to rotate on the link 32.
The side wall of the composite rolling box body 23 is fixedly provided with a second motor 27, the output end of the second motor 27 is connected with a screw 28, the screw 28 extends into the composite rolling box body 23 and is rotatably connected to the side wall of the composite rolling box body 23, a guide rod 29 is fixedly connected in the composite rolling box body 23, the guide rod 29 is parallel to the screw 28, and a sliding seat 30 is in threaded connection with the screw 28 and is in sliding connection with the guide rod 29.
At least two groups of composite compression rollers 33 are rotatably connected to the connecting frame 32, protective pads 34 are sleeved on the peripheries of the composite compression rollers 33, and the protective pads 34 are laid at the upper ends of the composite compression tables 26.
The composite rolling box body 23 is provided with a fan 38, an air outlet of the fan 38 is provided with a connecting pipe 40, the connecting pipe 40 extends into the composite rolling box body 23, an electric heating net 41 is arranged in the composite rolling box body 23, and the electric heating net 41 is positioned below the connecting pipe 40.
The composite rolling box body 23 is provided with an air filter 39, an air inlet of the air filter 39 is connected with an air outlet of the fan 38, and an air outlet of the air filter 39 is connected with a connecting pipe 40.
The side walls of the front end and the rear end of the composite rolling box body 23 are respectively provided with an observation window 24, and the observation windows 24 are hermetically provided with transparent toughened glass.
A third motor 36 is fixedly mounted on the fifth bracket 35, and the third motor 36 is connected with the material receiving roller 37.
The implementation benefit is three:
a PE and PTFE composite diaphragm comprises a PE film and a PTFE film, the composite diaphragm is a laminated structure of the PE film/the PTFE film/the PE film or the PTFE film/the PE film/the PTFE film, and the PE film comprises the following raw materials in parts by weight: 100 parts of low-density polyethylene, 30 parts of metallocene linear low-density polyethylene, 26 parts of thermoplastic polyurethane elastomer, 1.8 parts of calcium-zinc stabilizer, 1.4 parts of antioxidant, 12 parts of modified silicon carbide, 4 parts of silicic acid polymer powder, 4 parts of talcum powder and 3 parts of modified mica powder;
the preparation method of the PE film comprises the following steps:
s11: weighing talcum powder and modified mica powder, putting into a stirrer, and stirring and mixing to obtain a mixture A;
s12: weighing modified silicon carbide and silicic acid polymer powder, adding into the mixture A, and continuously stirring and mixing to obtain a mixture B;
s13: weighing a thermoplastic polyurethane elastomer, adding the thermoplastic polyurethane elastomer into the mixture B, and continuously stirring and mixing to obtain a mixture C;
s14: weighing low-density polyethylene and metallocene linear low-density polyethylene, putting into a mixer, stirring, mixing and discharging to obtain a mixture D;
s15: putting the mixture C, the mixture D, a calcium-zinc stabilizer and an antioxidant into an internal mixer, carrying out internal mixing treatment and discharging to obtain a mixture E, and feeding the mixture E into a film blowing machine to blow a film to obtain a PE film;
the preparation method of the PTFE membrane comprises the following steps:
s21: placing PTFE resin and a lubricant in a high-temperature mixer for mixing and curing to obtain a molten material H;
s22: extruding and molding the molten material H obtained in the step S21 through extruder equipment to obtain a membrane material G;
s23: and (3) longitudinally stretching the membrane material G obtained in the step (S22) at the temperature of 180-350 ℃ to prepare a base membrane, and then stretching the base membrane on a transverse stretcher to form the biaxially stretched PTFE membrane.
A preparation method of a PE and PTFE composite diaphragm comprises the following steps:
s31: soaking the PE film in a modified solution at 40-90 deg.C for 15-50min, wherein the modified solution is one or more of petroleum ether, gasoline, and kerosene, taking out the PE film, and vacuum drying;
s32: soaking the fully cleaned PTFE membrane in hydrophilic modification liquid for hydrophilic modification, taking out the PTFE membrane after soaking modification for 30-90 min, cleaning with deionized water, and drying in vacuum for later use;
s33: the PE film dried and reserved in the S31 and the PTFE film dried and reserved in the S32 are compounded through a rolling compounding device, the PE film or the PTFE film is wound on a first feeding roller 3, a second feeding roller 5 and a third feeding roller 71 respectively, the type of the film on the second feeding roller 5 is different from that of the film on the first feeding roller and the third feeding roller, the PE film or the PTFE film on the first feeding roller 3 sequentially enters a rolling mechanism 9 under the guiding action of a first guide roller 6 and a second guide roller 8, the PTFE film or the PE film on the second feeding roller 5 enters the rolling mechanism 9 under the guiding action of the second guide roller 8, the PE film or the PTFE film on the third feeding roller 71 enters the rolling mechanism 9, a first motor 20 works to drive a driving sprocket 21 to rotate, the driving sprocket 21 drives a driven sprocket 18 to rotate through a chain 22, so as to drive a rotating roller 12 to rotate to convey the composite film, a rotating adjusting bolt 15 drives an upper pressing roller 16 to move downwards along a sliding rail 13, the three-layer composite film is rolled, the composite film primarily rolled by the rolling mechanism 9 enters the composite rolling box body 23, the air cylinder 31 drives the connecting frame 32 to move downwards, the composite film is tightly pressed on the composite rolling platform 26 through the composite pressing roller 33, the protective pad 34 arranged outside the composite pressing roller 33 and on the composite rolling platform 26 plays a role in protecting the composite film, the electric heater 25 works to heat the composite rolling platform 26, the second motor 27 works to drive the screw 28 to rotate, the sliding seat 30 is driven to reciprocate along the guide rod 29 through the lead screw transmission principle, the reciprocating rolling of the composite film on the composite rolling platform 26 is realized, the electric heater 25 heats the composite rolling platform 26 to improve the composite effect of the film, the fan 38 works to blow air into the composite rolling box body 23 in the composite film rolling and compounding process, the air filter 39 filters the air blown into the composite rolling box body 23, the cleanliness of air blown into the composite rolling box body 23 is effectively ensured, so that the influence of dust impurities in the air on the compounding of the composite film is avoided, the air blown into the composite rolling box body 23 is heated under the action of the electric heating net 41, the heated air is blown into the upper surface of the composite film to blow and heat the upper surface of the composite film, the composite film is blown and dried while the compounding effect is improved, the rolled and molded composite film is wound on the material receiving roller 37, and the third motor 36 operates to drive the material receiving roller 37 to rotate to automatically wind the composite film;
s34: and (4) taking out the PE and PTFE composite membrane in the step S33, drying in a sealed clean constant-temperature drying oven, and cutting into a finished product after drying to obtain the PE and PTFE composite membrane.
Referring to fig. 1-6, the rolling and laminating apparatus includes a frame 1, a rolling mechanism 9, a laminating rolling box 23, a laminating rolling table 26 and a sliding seat 30; the left side of the rack 1 is fixedly connected with a first support 2, a second support 4 and a third support 7, the right side of the rack 1 is fixedly connected with a fifth support 35, the fifth support 35 is rotatably connected with a material receiving roller 37, the first support 2 is rotatably connected with a first feeding roller 3, the second support 4 is rotatably connected with a second feeding roller 5 and a first guide roller 6, the second support 4 is positioned between the first support 2 and the third support 7, and the third support 7 is rotatably connected with a third feeding roller 71 and a second guide roller 8;
the rolling mechanism 9 comprises a fourth bracket 10, a connecting bearing 11, a rotating roller 12, a rolling roller seat 14 and a motor mounting plate 19; the fourth support 10 is fixedly connected to the frame 1, two sets of the fourth support 10 are symmetrically arranged, a slide rail 13 is arranged on the upper portion of the fourth support 10, a compression roller seat 14 is connected to the slide rail 13 in an up-and-down sliding manner, an upper compression roller 16 is connected to the compression roller seat 14 in a rotating manner, an adjusting bolt 15 is connected to the upper end of the compression roller seat 14 in a rotating manner, the adjusting bolt 15 is in threaded connection with the fourth support 10, a connecting bearing 11 is fixedly connected to the fourth support 10, connecting shafts 17 are arranged at two ends of a rotating roller 12, the rotating roller 12 is positioned between the two sets of the fourth support 10 and below the upper compression roller 16, the connecting shafts 17 are fixedly connected to the inner ring of the connecting bearing 11, a driven sprocket 18 is fixedly connected to the connecting bearing 11 at one end, a motor mounting plate 19 is fixedly connected to the frame 1, a first motor 20 is fixedly mounted on the motor mounting plate, the chain 22 is meshed with the driven chain wheel 18;
compound roll-in box 23 fixed mounting is in frame 1, compound roll-in platform 26 is connected on frame 1 and is located compound roll-in box 23, compound roll-in platform 26 below is provided with electric heater 25, the horizontal sliding connection of sliding seat 30 is in compound roll-in box 23, vertical decurrent cylinder 31 is installed to the sliding seat 30 lower extreme, be provided with the cylinder telescopic link on the cylinder 31, be connected with link 32 on the cylinder telescopic link, it is connected with compound compression roller 33 to rotate on the link 32.
The side wall of the composite rolling box body 23 is fixedly provided with a second motor 27, the output end of the second motor 27 is connected with a screw 28, the screw 28 extends into the composite rolling box body 23 and is rotatably connected to the side wall of the composite rolling box body 23, a guide rod 29 is fixedly connected in the composite rolling box body 23, the guide rod 29 is parallel to the screw 28, and a sliding seat 30 is in threaded connection with the screw 28 and is in sliding connection with the guide rod 29.
At least two groups of composite compression rollers 33 are rotatably connected to the connecting frame 32, protective pads 34 are sleeved on the peripheries of the composite compression rollers 33, and the protective pads 34 are laid at the upper ends of the composite compression tables 26.
The composite rolling box body 23 is provided with a fan 38, an air outlet of the fan 38 is provided with a connecting pipe 40, the connecting pipe 40 extends into the composite rolling box body 23, an electric heating net 41 is arranged in the composite rolling box body 23, and the electric heating net 41 is positioned below the connecting pipe 40.
The composite rolling box body 23 is provided with an air filter 39, an air inlet of the air filter 39 is connected with an air outlet of the fan 38, and an air outlet of the air filter 39 is connected with a connecting pipe 40.
The side walls of the front end and the rear end of the composite rolling box body 23 are respectively provided with an observation window 24, and the observation windows 24 are hermetically provided with transparent toughened glass.
A third motor 36 is fixedly mounted on the fifth bracket 35, and the third motor 36 is connected with the material receiving roller 37.
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 forms 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 (9)

1. The composite membrane of PE and PTFE comprises a PE membrane and a PTFE membrane, and is a laminated structure of the PE membrane/the PTFE membrane/the PE membrane or the PTFE membrane/the PE membrane/the PTFE membrane, and is characterized in that the PE membrane comprises the following raw materials in parts by weight: 80-100 parts of low-density polyethylene, 25-30 parts of metallocene linear low-density polyethylene, 20-26 parts of thermoplastic polyurethane elastomer, 1.2-1.8 parts of calcium-zinc stabilizer, 0.8-1.4 parts of antioxidant, 8-12 parts of modified silicon carbide, 2-4 parts of silicic acid polymer powder, 2-4 parts of talcum powder and 1-3 parts of modified mica powder;
the preparation method of the PE film comprises the following steps:
s11: weighing talcum powder and modified mica powder, putting into a stirrer, and stirring and mixing to obtain a mixture A;
s12: weighing modified silicon carbide and silicic acid polymer powder, adding into the mixture A, and continuously stirring and mixing to obtain a mixture B;
s13: weighing a thermoplastic polyurethane elastomer, adding the thermoplastic polyurethane elastomer into the mixture B, and continuously stirring and mixing to obtain a mixture C;
s14: weighing low-density polyethylene and metallocene linear low-density polyethylene, putting into a mixer, stirring, mixing and discharging to obtain a mixture D;
s15: putting the mixture C, the mixture D, a calcium-zinc stabilizer and an antioxidant into an internal mixer, carrying out internal mixing treatment and discharging to obtain a mixture E, and feeding the mixture E into a film blowing machine to blow a film to obtain a PE film;
the preparation method of the PTFE membrane comprises the following steps:
s21: placing PTFE resin and a lubricant in a high-temperature mixer for mixing and curing to obtain a molten material H;
s22: extruding and molding the molten material H obtained in the step S21 through extruder equipment to obtain a membrane material G;
s23: and (3) longitudinally stretching the membrane material G obtained in the step (S22) at the temperature of 180-350 ℃ to prepare a base membrane, and then stretching the base membrane on a transverse stretcher to form the biaxially stretched PTFE membrane.
2. A method for preparing a PE and PTFE composite separator according to claim 1, comprising the steps of:
s31: soaking the PE film in a modified solution at 40-90 deg.C for 15-50min, wherein the modified solution is one or more of petroleum ether, gasoline, and kerosene, taking out the PE film, and vacuum drying;
s32: soaking the fully cleaned PTFE membrane in hydrophilic modification liquid for hydrophilic modification, taking out the PTFE membrane after soaking modification for 30-90 min, cleaning with deionized water, and drying in vacuum for later use;
s33: the PE film dried and reserved in the S31 and the PTFE film dried and reserved in the S32 are compounded through a rolling compounding device, the PE film or the PTFE film is wound on a first feeding roller (3), a second feeding roller (5) and a third feeding roller (71) respectively, the type of the film on the second feeding roller (5) is different from that of the film on the first feeding roller and the third feeding roller, the PE film or the PTFE film on the first feeding roller (3) enters a rolling mechanism (9) under the guiding action of a first guide roller (6) and a second guide roller (8) in sequence, the PTFE film or the PE film on the second feeding roller (5) enters the rolling mechanism (9) under the guiding action of the second guide roller (8), the PE film or the PTFE film on the third feeding roller (71) enters the rolling mechanism (9), a first motor (20) works to drive a driving chain wheel (21) to rotate, and the driving chain wheel (21) drives a driven chain wheel (18) to rotate through the driving chain (22), thereby driving the rotating roller (12) to rotate to convey the composite film, rotating the adjusting bolt (15) to drive the upper press roller (16) to move downwards along the slide rail (13) to roll the three-layer composite film, the composite film primarily rolled by the rolling mechanism (9) enters the composite rolling box body (23), the cylinder (31) drives the connecting frame (32) to move downwards, the composite film is tightly pressed on the composite rolling platform (26) through the composite press roller (33), the protective pads (34) arranged outside the composite press roller (33) and on the composite rolling platform (26) play a role in protecting the composite film, the electric heater (25) works to heat the composite rolling platform (26), the second motor (27) works to drive the screw rod (28) to rotate, the sliding seat (30) is driven to move back and forth along the guide rod (29) through the lead screw transmission principle, so as to realize the back and forth rolling of the composite film on the composite rolling platform (26), the heating of the electric heater (25) to the composite rolling table (26) improves the composite effect of the film, in the process of rolling and compounding the composite film, the fan (38) works to blow air into the composite rolling box body (23), the air filter (39) filters the air blown into the composite rolling box body (23), the cleanliness of the air blown into the composite rolling box body (23) is effectively ensured, thereby avoiding the influence of dust and sundries in the air on the compounding of the film, the air blown into the compounding rolling box body (23) is heated under the action of the electric heating net (41), the heated air is blown into the upper surface of the compounding film, the upper surface of the composite film is blown and heated, the composite effect is improved, meanwhile, the composite film is blown and dried, the rolled and molded composite film is wound on a material receiving roller (37), and a third motor (36) works to drive the material receiving roller (37) to rotate so as to automatically wind the composite film;
s34: and (4) taking out the PE and PTFE composite membrane in the step S33, drying in a sealed clean constant-temperature drying oven, and cutting into a finished product after drying to obtain the PE and PTFE composite membrane.
3. The preparation method of the PE and PTFE composite membrane according to claim 2, wherein the rolling and compounding device comprises a frame (1), a rolling mechanism (9), a composite rolling box body (23), a composite rolling platform (26) and a sliding seat (30); a first support (2), a second support (4) and a third support (7) are fixedly connected to the left side of the rack (1), a fifth support (35) is fixedly connected to the right side of the rack (1), a material receiving roller (37) is rotatably connected to the fifth support (35), a first feeding roller (3) is rotatably connected to the first support (2), a second feeding roller (5) and a first guide roller (6) are rotatably connected to the second support (4), the second support (4) is located between the first support (2) and the third support (7), and a third feeding roller (71) and a second guide roller (8) are rotatably connected to the third support (7);
the rolling mechanism (9) comprises a fourth bracket (10), a connecting bearing (11), a rotating roller (12), a rolling roller seat (14) and a motor mounting plate (19); the fourth support (10) is fixedly connected to the rack (1), the fourth support (10) is symmetrically provided with two groups, a sliding rail (13) is arranged on the upper portion of the fourth support (10), the compression roller seat (14) is connected to the sliding rail (13) in a vertical sliding mode, an upper compression roller (16) is connected to the compression roller seat (14) in a rotating mode, an adjusting bolt (15) is connected to the upper end of the compression roller seat (14) in a rotating mode, the adjusting bolt (15) is in threaded connection with the fourth support (10), the connecting bearing (11) is fixedly connected to the fourth support (10), connecting shafts (17) are arranged at two ends of the rotating roller (12), the rotating roller (12) is located between the two groups of the fourth support (10) and below the upper compression roller (16), and the connecting shafts (17) are fixedly connected to the inner ring of the connecting bearing (11), one end of the connecting bearing (11) is fixedly connected with a driven sprocket (18), the motor mounting plate (19) is fixedly connected to the rack (1), the motor mounting plate (19) is fixedly provided with a first motor (20), the output end of the first motor (20) is connected with a driving sprocket (21), the driving sprocket (21) is connected with a chain (22) in a meshing manner, and the chain (22) is connected with the driven sprocket (18) in a meshing manner;
compound roll-in box (23) fixed mounting be in on frame (1), compound roll-in platform (26) are connected just be located in frame (1) in the compound roll-in box (23), compound roll-in platform (26) below is provided with electric heater (25), sliding seat (30) horizontal sliding connection is in the compound roll-in box (23), vertical decurrent cylinder (31) are installed to sliding seat (30) lower extreme, be provided with the cylinder telescopic link on cylinder (31), be connected with link (32) on the cylinder telescopic link, it is connected with compound compression roller (33) to rotate on link (32).
4. The preparation method of the PE and PTFE composite membrane according to claim 3, wherein a second motor (27) is fixedly installed on the side wall of the composite rolling box body (23), a screw (28) is connected to the output end of the second motor (27), the screw (28) extends into the composite rolling box body (23) and is rotatably connected to the side wall of the composite rolling box body (23), a guide rod (29) is fixedly connected in the composite rolling box body (23), the guide rod (29) is parallel to the screw (28), and the sliding seat (30) is in threaded connection with the screw (28) and is in sliding connection with the guide rod (29).
5. The preparation method of the PE and PTFE composite membrane according to claim 3, wherein at least two groups of composite compression rollers (33) are rotatably connected to the connecting frame (32), protective pads (34) are sleeved on the peripheries of the composite compression rollers (33), and the protective pads (34) are laid on the upper ends of the composite compression tables (26).
6. The preparation method of the PE and PTFE composite membrane according to claim 3, wherein a fan (38) is arranged on the composite rolling box body (23), a connecting pipe (40) is arranged at an air outlet of the fan (38), the connecting pipe (40) extends into the composite rolling box body (23), an electric heating net (41) is arranged in the composite rolling box body (23), and the electric heating net (41) is positioned below the connecting pipe (40).
7. A preparation method of a PE and PTFE composite membrane according to claim 6, wherein an air filter (39) is installed on the composite rolling box body (23), an air inlet of the air filter (39) is connected with an air outlet of the fan (38), and an air outlet of the air filter (39) is connected with the connecting pipe (40).
8. The preparation method of the PE and PTFE composite diaphragm according to claim 3, wherein the side walls of the front end and the rear end of the composite rolling box body (23) are respectively provided with an observation window (24), and the observation windows (24) are hermetically provided with transparent toughened glass.
9. A method for preparing a PE and PTFE composite membrane according to claim 3, characterized in that a third motor (36) is fixedly mounted on the fifth support (35), and the third motor (36) is connected to the take-up roll (37).
CN202010239468.1A 2020-03-30 2020-03-30 PE and PTFE composite diaphragm and preparation method thereof Pending CN111430645A (en)

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CN111923509A (en) * 2020-08-14 2020-11-13 湖州新仲湖针织制衣有限公司 Surface moisture-resistant disposable protective clothing fabric and preparation process thereof
CN112018306A (en) * 2020-10-13 2020-12-01 河南银金达新材料股份有限公司 Film without impurity adhesion and preparation method thereof
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Application publication date: 20200717