CN109486121A - A kind of preparation method of transparent antibacterial polyester film - Google Patents
A kind of preparation method of transparent antibacterial polyester film Download PDFInfo
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- CN109486121A CN109486121A CN201811157026.1A CN201811157026A CN109486121A CN 109486121 A CN109486121 A CN 109486121A CN 201811157026 A CN201811157026 A CN 201811157026A CN 109486121 A CN109486121 A CN 109486121A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
-
- 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
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
-
- 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
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- 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
- C08K3/36—Silica
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Wrappers (AREA)
- Packages (AREA)
Abstract
The invention discloses a kind of preparation method of transparent antibacterial polyester film, the polyester film includes middle layer, upper epidermis and layer；Wherein, the upper epidermis and layer are antibacterial functions layer, include the following steps: that (1) prepares blank polyester piece；(2) antibacterial master slice is prepared；(3) dry water removal；(4) twin-screw extrusion；(5) slab；(6) biaxial tension and thermal finalization.A kind of preparation method of transparent antibacterial polyester film of the present invention, pass through the design of the formula of blank polyester piece and antibacterial diaphragm and reasonable moulding process design, so that prepared polyester film transparency is high, and has broad-spectrum antimicrobial effect, especially there is excellent anti-microbial property to staphylococcus aureus, be with a wide range of applications in food packaging and Key works Drug packing industry.
Description
Technical field
The present invention relates to thin film technique fields, more particularly to a kind of preparation method of transparent antibacterial polyester film.
Background technique
Polyester film is a kind of colorless and odorless, transparent film, has tensile strength height, good in optical property, elasticity modulus
The features such as height, good toughness, thermal stability are good, while having many advantages, such as that acid resistance, alkali resistance, air-tightness are good.Polyester film is present
Most of product answer packaging industry, such as food packaging, Yan Bao, Jiu Bao, Key works Drug packing.Polyester film is used for above-mentioned packaging row
When in industry, especially in food package box Key works Drug packing, it is desirable that it is with anti-microbial property, to avoid the growth of bacterium.But it is existing
There is anti-microbial property difference in polyester film, be not able to satisfy requirement.In addition, the polyester for above-mentioned packaging industry is ground
It is thin, it is desirable that transparency with higher, in order to clearly observe the state of packing material, but the transparency of existing film is low,
There is slight mist, using effect is poor.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of preparation methods of transparent antibacterial polyester film, are able to solve
It is existing to be packed for the above problem existing for polyester film.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: it is thin to provide a kind of transparent antibacterial polyester
The preparation method of film, which is characterized in that the polyester film includes middle layer, upper epidermis and layer；Wherein, the upper epidermis
It is antibacterial functions layer with layer, includes the following steps:
(1) prepare blank polyester piece: by weight, by 15~20 parts of terephthalic acid (TPA)s, 5~10 parts of M-phthalic acids, 10~
100 parts of 1,4- butanediols, 5~15 parts of glycerine, 5~8 parts of tetramethylol methanes, 20~30 parts of phloroglucitols are added
Pulping tank stirring is introduced into esterifying kettle and carries out esterification, then is pressed into polycondensation vessel and carries out prepolymerization reaction, the molten state after polycondensation
Polyethylene terephthalate, by filter impurity screening, tie rod is cooling, blank slice is just made after pelleter pelletizing；
(2) prepare antibacterial master slice: in the pulping tank of step (1), by weight, be added 15~20 parts of chitin fibers, 5~
10 parts of wrinkled giant hyssop powder, 10~15 parts of fragrant eupatorium herb extracts, 10~15 parts of Herba Menthae powders, 5~10 parts of sodium cellulose glycolates, 5~10 parts
Sodium alginate and 5~10 parts of nano-mixtures；Antibacterial master slice is made in other same steps (1)；
(3) blank polyester piece and antibacterial master slice obtained in step (1) and step (2) first dry water removal: are respectively placed in pre- knot
Predrying is carried out in brilliant device, is subsequently placed in progress redrying water removal in drying tower, blank polyester piece and antibacterial after making drying
The water content of master slice is less than 30ppm；
(4) twin-screw extrusion: using vented twin-screw extruder, blank polyester piece be placed in host extruder and is squeezed out, will
The mixture of blank polyester piece and antibacterial master slice is respectively placed in two subsidiary engine extruders and squeezes out, and obtains three melt extrudate
Material；
(5) slab: by sharp cooling roll, mix the fused materials squeezed out in step (4) by blank polyester piece and antibacterial master slice molten
The form for melting material, blank polyester piece fused materials, blank polyester piece and antibacterial master slice mixed melting material forms chill casting piece；
(6) the chill casting piece in step (5) biaxial tension and thermal finalization: is passed through into cross directional stretch, longitudinal stretching and thermal finalization respectively
The transparent antibacterial polyester film is made in technique.
In a preferred embodiment of the present invention, in the step (1), the condition of the esterification are as follows: temperature 250~
280 DEG C, 0.1~0.3MPa of pressure；The condition of the prepolymerization reaction are as follows: 285~300 DEG C of temperature, 100~300Pa of pressure.
In a preferred embodiment of the present invention, in the step (2), the nano-mixture be nano silica and
The mixture that nano zine oxide is mixed with the mass ratio of 2:1.
In a preferred embodiment of the present invention, the partial size of the nano-mixture is 50~80nm.
In a preferred embodiment of the present invention, in the step (3), the pre-dried process conditions are as follows: temperature 150
~160 DEG C, 30~35min of time；The process conditions of the redrying water removal are as follows: 160~175 DEG C of temperature, 4~5h of time.
In a preferred embodiment of the present invention, in the step (4), the extrusion temperature of the host extruder is 268
~278 DEG C, the extrusion temperature of the subsidiary engine extruder is 265~270 DEG C.
In a preferred embodiment of the present invention, in the step (4), institute in the host extruder and subsidiary engine extruder
The mass ratio of some blank slices and antibacterial master slice is 60:40~70:30.
In a preferred embodiment of the present invention, in the step (5), the temperature of the slab is 20~35 DEG C.
In a preferred embodiment of the present invention, in the step (6), the temperature stretching in the transverse direction is 75~80 DEG C,
Draw ratio is 3.4~3.5；The temperature of the longitudinal stretching is 80~85 DEG C, and draw ratio is 3.5~3.6.
In a preferred embodiment of the present invention, in the step (6), the temperature of the thermal finalization is 200~220 DEG C.
The beneficial effects of the present invention are: a kind of preparation method of transparent antibacterial polyester film of the present invention, passes through blank polyester
Piece, the formula design of antibacterial diaphragm, water removal process and the design of reasonable moulding process, so that prepared polyester film is transparent
Degree is high, and has broad-spectrum antimicrobial effect, especially has excellent anti-microbial property to staphylococcus aureus, in food packaging and
Key works Drug packing industry is with a wide range of applications.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
The embodiment of the present invention includes:
Embodiment 1
Present invention discloses a kind of preparation method of transparent antibacterial polyester film, the polyester film includes middle layer, upper epidermis
And layer；Wherein, the middle layer is made of blank polyester piece, and the upper epidermis and layer are antibacterial functions layer, tool
Body is the mixed layer of blank polyester piece and antibacterial master slice, the matter of all blank polyester piece and antibacterial master slice in the polyester film
Amount is than being 60:40.
Include the following steps:
(1) blank polyester piece is prepared: by weight, by 15 parts of terephthalic acid (TPA)s, 5 parts of M-phthalic acids, 10 parts of Isosorbide-5-Nitrae-fourths two
Alcohol, 5 parts of glycerine, 5 parts of tetramethylol methanes, 20 part 1,3,5- phloroglucitols are added pulping tank stirring, are introduced into esterifying kettle,
It is 250~280 DEG C in temperature, pressure carries out esterification under conditions of being 0.1~0.3MPa, then is pressed into polycondensation vessel, in temperature
285~300 DEG C, pressure carries out prepolymerization reaction under conditions of being 100~300Pa, the poly- terephthaldehyde of the molten state after polycondensation
Blank slice is just made after filter impurity screening, tie rod cooling, pelleter pelletizing in sour second diester；
(2) antibacterial master slice is prepared: in the production process of polyester film, in order to improve the physical property of film or assign film
A little functional characteristics generally require that suitable female slice is added in polyester raw material.The production process and production equipment base of mother's slice
This is identical with blank slice, only more than an additive prepare and put into the process mixed in reaction kettle.Therefore, in step
(1) in pulping tank, by weight, 15 parts of chitin fibers, 5 parts of wrinkled giant hyssop powder, 10 parts of fragrant eupatorium herb extracts, 10 parts thin are added
Lotus powder, 5 parts of sodium cellulose glycolates, 5 parts of sodium alginates and 5 parts of nano-mixtures；Antibacterial master slice is made in other same steps (1)；
Wherein, the nano-mixture is the mixture that nano silica and nano zine oxide are mixed with the mass ratio of 2:1, institute
The partial size for stating nano-mixture is 50~80nm；
(3) blank polyester piece and antibacterial master slice obtained in step (1) and step (2) first dry water removal: are respectively placed in pre- knot
Predrying is carried out in brilliant device, specifically, on 150~160 DEG C of at a temperature of 30~35min of predrying, a small amount of surface layer of quickly going out
Moisture is subsequently placed in drying tower progress redrying water removal, specifically, in 160~175 DEG C of at a temperature of dry 4~5h, into
The dry water removal of row deep layer, the water content of blank polyester piece and antibacterial master slice after making drying are less than 30ppm；Because of moisture content pair
The transparency of polyester film has apparent influence after molding, therefore, it is necessary to carry out stringent dry water removal；
(4) twin-screw extrusion: use vented twin-screw extruder, in order to be discharged in time the moisture generated in extrusion process and
Small molecule reaction product；Specifically, blank polyester piece is placed in host extruder and squeezes out and enters die head, extrusion temperature is
268~278 DEG C；The mixture of blank polyester piece and antibacterial master slice is placed in two subsidiary engine extruders and squeezes out and enter die head,
Extrusion temperature is 265~270 DEG C, and three materials mix at die head, by blank polyester piece and antibacterial master slice mixed melting material,
The form of blank polyester piece fused materials, blank polyester piece and antibacterial master slice mixed melting material, obtains the melting of three-decker
Material；The mass ratio of blank polyester piece and antibacterial master slice in above-mentioned main extruder and subsidiary extruder is 60:40~70:30；
(5) after polymer melt leaves die head, by means of the external force of tab device, it slab: is attached to low temperature, bloom rapidly
In cleanliness, the chilling roller surface of chromium plating.Since high-temperature fusant and chilling roller can carry out heat exchange in time, melt is by cold rapidly
But, solid sheet is just formed after it is detached from chilling roller, this process is known as slab process.
By sharp cooling roll, makes the fused materials form of the three-decker squeezed out in step (4), formed at 20~35 DEG C cold
Slab；
(6) it is fixed that the chill casting piece in step (5) biaxial tension and thermal finalization: is passed through into cross directional stretch, longitudinal stretching and cooling respectively
The transparent antibacterial polyester film is made in type technique；Specifically, the temperature stretching in the transverse direction is 75~80 DEG C, and draw ratio is
3.4~3.5；The temperature of the longitudinal stretching be 80~85 DEG C, draw ratio be 3.5~3.6, finally, at 200~220 DEG C into
Row thermal finalization.
Embodiment 2
The difference from embodiment 1 is that the mass ratio of blank polyester piece and antibacterial master slice all in the polyester film is 70:
30。
The blank polyester piece: by weight, including 20 parts of terephthalic acid (TPA)s, 10 parts of M-phthalic acids, 100 parts of Isosorbide-5-Nitraes-
Butanediol, 15 parts of glycerine, 8 parts of tetramethylol methanes and 30 parts of phloroglucitols；
The production process and production equipment of the antibacterial master slice be basic identical with blank slice, only more than an additive prepare
With put into the process mixed in reaction kettle.Therefore, in the pulping tank of step (1), by weight, 20 parts of chitins are added
Fiber, 10 parts of wrinkled giant hyssop powder, 15 parts of fragrant eupatorium herb extracts, 15 parts of Herba Menthae powders, 10 parts of sodium cellulose glycolates, 10 parts of sodium alginates and
10 parts of nano-mixtures；Antibacterial master slice is made in other same steps (1).
Transparent antibacterial polyester film obtained by the above method, after tested, transparency are 99.24 or more, and have wide spectrum
Antibiotic property, wherein 96% is higher than to the antibiotic property of staphylococcus aureus.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of transparent antibacterial polyester film, which is characterized in that the polyester film includes middle layer, upper epidermis
And layer；Wherein, the upper epidermis and layer are antibacterial functions layer, are included the following steps:
(1) prepare blank polyester piece: by weight, by 15~20 parts of terephthalic acid (TPA)s, 5~10 parts of M-phthalic acids, 10~
100 parts of 1,4- butanediols, 5~15 parts of glycerine, 5~8 parts of tetramethylol methanes, 20~30 parts of phloroglucitols are added
Pulping tank stirring is introduced into esterifying kettle and carries out esterification, then is pressed into polycondensation vessel and carries out prepolymerization reaction, the molten state after polycondensation
Polyethylene terephthalate, by filter impurity screening, tie rod is cooling, blank slice is just made after pelleter pelletizing；
(2) prepare antibacterial master slice: in the pulping tank of step (1), by weight, be added 15~20 parts of chitin fibers, 5~
10 parts of wrinkled giant hyssop powder, 10~15 parts of fragrant eupatorium herb extracts, 10~15 parts of Herba Menthae powders, 5~10 parts of sodium cellulose glycolates, 5~10 parts
Sodium alginate and 5~10 parts of nano-mixtures；Antibacterial master slice is made in other same steps (1)；
(3) blank polyester piece and antibacterial master slice obtained in step (1) and step (2) first dry water removal: are respectively placed in pre- knot
Predrying is carried out in brilliant device, is subsequently placed in progress redrying water removal in drying tower, blank polyester piece and antibacterial after making drying
The water content of master slice is less than 30ppm；
(4) twin-screw extrusion: using vented twin-screw extruder, blank polyester piece be placed in host extruder and is squeezed out, will
The mixture of blank polyester piece and antibacterial master slice is respectively placed in two subsidiary engine extruders and squeezes out, and the melting for obtaining three-decker is squeezed
Material out；
(5) slab: by sharp cooling roll, mix the fused materials squeezed out in step (4) by blank polyester piece and antibacterial master slice molten
The form for melting material, blank polyester piece fused materials, blank polyester piece and antibacterial master slice mixed melting material forms chill casting piece；
(6) the chill casting piece in step (5) biaxial tension and thermal finalization: is passed through into cross directional stretch, longitudinal stretching and thermal finalization respectively
The transparent antibacterial polyester film is made in technique.
2. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (1),
The condition of the esterification are as follows: 250~280 DEG C of temperature, 0.1~0.3MPa of pressure；The condition of the prepolymerization reaction are as follows: temperature
285~300 DEG C of degree, 100~300Pa of pressure.
3. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (2),
The nano-mixture is the mixture that nano silica and nano zine oxide are mixed with the mass ratio of 2:1.
4. the preparation method of transparent antibacterial polyester film according to claim 3, which is characterized in that the nano-mixture
Partial size be 50~80nm.
5. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (3),
The pre-dried process conditions are as follows: 150~160 DEG C of temperature, 30~35min of time；The technique item of the redrying water removal
Part are as follows: 160~175 DEG C of temperature, 4~5h of time.
6. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (4),
The extrusion temperature of the host extruder is 268~278 DEG C, and the extrusion temperature of the subsidiary engine extruder is 265~270 DEG C.
7. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (4),
The mass ratio of all blank slice and antibacterial master slice is 60:40~70:30 in the host extruder and subsidiary engine extruder.
8. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (5),
The temperature of the slab is 20~35 DEG C.
9. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that in the step (6),
The temperature stretching in the transverse direction is 75~80 DEG C, and draw ratio is 3.4~3.5；The temperature of the longitudinal stretching is 80~85 DEG C, is drawn
It stretches than being 3.5~3.6.
10. the preparation method of transparent antibacterial polyester film according to claim 1, which is characterized in that the step (6)
In, the temperature of the thermal finalization is 200~220 DEG C.
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