CN112373151A - Preparation method of sterilization type easy-to-tear sealing cover film - Google Patents

Preparation method of sterilization type easy-to-tear sealing cover film Download PDF

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Publication number
CN112373151A
CN112373151A CN202011140514.9A CN202011140514A CN112373151A CN 112373151 A CN112373151 A CN 112373151A CN 202011140514 A CN202011140514 A CN 202011140514A CN 112373151 A CN112373151 A CN 112373151A
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China
Prior art keywords
printing
layer
base layer
printing base
cover film
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Pending
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CN202011140514.9A
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Chinese (zh)
Inventor
卿前仲
陈威
张朋
吉萌菲
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GOLDSTONE PACKAGING (JIAXING) CO Ltd
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GOLDSTONE PACKAGING (JIAXING) CO Ltd
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Priority to CN202011140514.9A priority Critical patent/CN112373151A/en
Publication of CN112373151A publication Critical patent/CN112373151A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2435/00—Closures, end caps, stoppers
    • B32B2435/02—Closures, end caps, stoppers for containers

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The invention relates to a preparation method of a sterilization type easy-to-tear sealing cover film, which is used for preparing the sterilization type easy-to-tear sealing cover film and comprises but is not limited to a printing base layer and a heat sealing layer, and the preparation method comprises the following steps: preparing a printing base layer and carrying out composite forming; the invention has the advantages that: the printing base layer and the heat sealing layer are bonded together through gravure printing in the first step and dry compounding in the second step, and the printing layer is formed by printing through cooking type printing ink, so that the surface of the whole composite film has good high-temperature sterilization resistance, the composite film can be sterilized at the high temperature of 100-135 ℃ for 30-60 min, the sterilized product is prevented from discoloring and breaking bags and folds, the quality of the product is stable in the quality guarantee period, the storage time of the product is greatly prolonged, and the adopted printing ink, glue and materials are all compounded with food safety regulations, so that the composite film has great market prospect, social benefits and economic benefits in the field of sterilized medical instruments and health-care products.

Description

Preparation method of sterilization type easy-to-tear sealing cover film
Technical Field
The invention relates to a preparation method of a sterilization type easy-to-tear sealing cover film.
Background
With the rapid development of the packaging industry, the convenient and convenient packaging product is widely applied to various industries, and the easy-to-tear sealing cover film is one of the industries. The easy-to-tear sealing cover film can be also called as an easy-to-tear cover film and an easy-to-tear sealing film, is mainly used for the industries of food, medicine, chemical packaging and the like in daily production and life, is an inner package, has the advantages of good sealing performance, easy tearing and the like, and simultaneously has the characteristics of corrosion resistance, oxidation resistance, acid hydrolysis resistance, long-term storage and the like. The packaging film has the effects of protecting the product quality and sealing various containers (various plastic bottles, plastic boxes, disposable milk tea cups and the like) when the product is packaged, is convenient to uncover without using auxiliary tools when in use, and can be particularly applied to packaging products such as cooked food cover films, sealing films for milk products and beverages, jelly cover films, easy-to-uncover sealing films for medical equipment and the like.
Although many packages are exquisite and can protect the product, the traditional packages are inconvenient to use because the seal is too firm. It is based on this that many packages that facilitate people's lives are produced at the same time. What is the easy-to-open flap film that is rapidly popular after appearance and is used in all trades? Firstly, the package is easy to be sealed at the sealing position compared with the common package, the package needs to be torn vigorously, part of the package is inevitably spilled, waste is caused, the easily torn sealing cover film can be smoothly peeled off, and unnecessary waste caused by spilling the package is avoided; secondly, the easy-to-uncover cover film is applied to products, can be quickly opened without tools in the using process, can be uncovered without residues to ensure the sanitation of the sealing position, and can greatly shorten the time for taking out contents in emergency particularly when being used on medical appliance products, and can be quickly taken out for use.
Disclosure of Invention
The invention aims to provide a preparation method of a sterile easy-to-tear sealing cover film, which can avoid the problems of color change, layering, liquid leakage and wrinkling after high-temperature sterilization and improve the quality safety and stability of product contents.
In order to solve the technical problems, the invention is realized by the following technical scheme: the preparation method of the sterilization type easy-to-tear sealing cover film is used for preparing the sterilization type easy-to-tear sealing cover film, the sterilization type easy-to-tear sealing cover film comprises a body, the body comprises a printing base layer and a heat sealing layer from outside to inside, a printing layer is arranged on the printing base layer and is formed by printing cooking type ink, the printing base layer and the heat sealing layer are bonded through a double-component polyurethane adhesive, the printing base layer is an aluminum foil or a biaxially-oriented polyester film, the heat sealing layer is polyethylene or cast polypropylene, and the preparation method comprises the following steps:
the method comprises the following steps: preparing a printing base layer: the printing base layer is arranged on an unreeling frame of an intaglio printing press, then printing ink is coated on the surface of the printing base layer through the intaglio printing press, and the printing base layer is dried, wherein the printing speed is not more than 120M/min, and the drying temperature is 40-85 ℃;
step two: and (3) composite molding: and (2) mounting the printing base layer prepared in the first step on a unreeling frame of a dry compound machine, compounding the printing base layer on the middle layer through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, and curing the compounded composite film in a curing chamber, wherein the coating quantity of the cooking type two-component polyurethane adhesive is 4-5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 80-120M/min, the curing temperature is 45-60 ℃, and the curing time is 90-144 h.
Preferably, when the printing base layer is an aluminum foil, the thickness of the printing base layer is equal to 30-50 um, the thickness of the heat sealing layer is equal to 30-80 um, and the dyne value of the composite surface of the heat sealing layer is not lower than 38.
Preferably, when the printing base layer is a biaxially oriented polyester film, a middle layer is arranged between the printing base layer and the heat sealing layer, the thickness of the printing base layer is equal to 7-12 um, the surface tension value of the printing base layer is not lower than 52 dyne, the thickness of the heat sealing layer is equal to 30-80 um, and the composite surface dyne value of the heat sealing layer is not lower than 38.
Preferably, the intermediate layer is aluminum foil or nylon.
Preferably, when the intermediate level is the aluminium foil, the thickness in intermediate level is 30 ~ 50um, when the intermediate level is nylon, the thickness in intermediate level is 15 ~ 25 um.
In conclusion, the invention has the advantages that: the printing base layer and the heat sealing layer are bonded together through gravure printing in the first step and dry compounding in the second step, the printing layer is printed by cooking type printing ink, so that the surface of the whole composite film has good high-temperature sterilization resistance, the composite film can be sterilized at the high temperature of 100-135 ℃ for 30-60 min, the sterilized product can be ensured not to change color, bags and folds are not broken, the stable quality of the product in the quality guarantee period is realized, the storage time of the product is greatly prolonged, the adopted printing ink, glue and materials are all compounded with food safety regulations, the composite film has great market prospect, social and economic benefits in the field of sterilization type medical appliances and health products, secondly, the heat sealing layer is arranged, a consumer can easily tear the covering film without other tools, the content can be easily taken out, meanwhile, the problems of wire drawing and tearing are not generated during tearing, the sealing position after tearing is clean and has no residue, the air tightness of the seal can be met while the tearing property is ensured.
Detailed Description
The first embodiment is as follows:
the utility model provides a preparation method of sterilization type easily tears sealing cover film for preparation sterilization type easily tears sealing cover film, sterilization type easily tears sealing cover film includes the body, from outer to interior the body includes but not limited to printing basic unit and heat-seal layer, be equipped with one deck printing layer on the printing basic unit, the printing layer is formed through the printing of cooking type printing ink, form through two ingredient polyurethane binder bonding between printing basic unit and the heat-seal layer, the printing basic unit is the aluminium foil, the heat-seal layer is polyethylene, and the thickness of aluminium foil equals 50um, the thickness of heat-seal layer equals 70um, preparation method includes following step:
the method comprises the following steps: preparing a printing base layer: mounting an aluminum foil on an unreeling frame of an intaglio printing press, coating ink on the surface of a printing base layer through the intaglio printing press, and drying the aluminum foil at the printing speed of 120M/min and the drying temperature of 65 ℃;
step two: and (3) composite molding: and (2) loading the aluminum foil prepared in the first step on a unreeling frame of a dry compound machine, compounding the aluminum foil on polyethylene through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, and allowing the compounded composite film to enter a curing chamber for curing treatment, wherein the coating weight of the cooking type two-component polyurethane adhesive is 4.5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 100M/min, the curing temperature is 55 ℃, and the curing time is 144 h.
Example two:
the utility model provides a preparation method of sterilization type easily tears sealing cover film for preparation sterilization type easily tears sealing cover film, sterilization type easily tears sealing cover film includes the body, from outer to interior the body includes but not limited to printing basic unit and heat-seal layer, be equipped with one deck printing layer on the printing basic unit, the printing layer is formed through the printing of cooking type printing ink, form through two ingredient polyurethane adhesive bonding between printing basic unit and the heat-seal layer, the printing basic unit is the aluminium foil, the heat-seal layer is curtain coating polypropylene, just the thickness of aluminium foil equals 50um, the thickness of heat-seal layer equals 70um, preparation method includes following step:
the method comprises the following steps: preparing a printing base layer: mounting an aluminum foil on an unreeling frame of an intaglio printing press, coating ink on the surface of the aluminum foil through the intaglio printing press, and drying the aluminum foil at the printing speed of 100M/min and the drying temperature of 55 ℃;
step two: and (3) composite molding: and (2) loading the aluminum foil prepared in the first step on a unreeling frame of a dry compound machine, compounding the aluminum foil on cast polypropylene through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, and feeding the compounded composite film into a curing chamber for curing treatment, wherein the coating quantity of the cooking type two-component polyurethane adhesive is 4.5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 90M/min, the curing temperature is 55 ℃, and the curing time is 144 h.
Example three:
the utility model provides a preparation method of sterilization type easily tears sealing cover film for preparation sterilization type easily tears sealing cover film, sterilization type easily tears sealing cover film includes the body, from outer to interior the body includes but not limited to printing basic unit and heat-seal layer, be equipped with one deck printing layer on the printing basic unit, the printing layer forms through the printing of cooking type printing ink, form through two ingredient polyurethane adhesive bonding between printing basic unit and the heat-seal layer, the printing basic unit is biaxial stretching polyester film, the heat-seal layer is polyethylene, just the thickness of printing basic unit equals 7um, the thickness of heat-seal layer equals 65um, still be equipped with the intermediate level between printing basic unit and the heat-seal layer, the intermediate level is the aluminium foil, the thickness of intermediate level equals 45um, preparation method includes following steps:
the method comprises the following steps: preparing a printing base layer: the method comprises the following steps of (1) mounting a biaxially oriented polyester film on a unreeling frame of an intaglio printing press, coating ink on the surface of the biaxially oriented polyester film through the intaglio printing press, and drying the biaxially oriented polyester film, wherein the printing speed is 110M/min, and the drying temperature is 55 ℃;
step two: and (3) composite molding: and (2) loading the biaxially oriented polyester film prepared in the first step on a unreeling frame of a dry compound machine, compounding the biaxially oriented polyester film on an aluminum foil through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, sequentially performing the operations to compound the aluminum foil on polyethylene, and allowing the compounded composite film to enter a curing chamber for curing treatment, wherein the coating amount of the cooking type two-component polyurethane adhesive is 4.5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 90M/min, the curing temperature is 60 ℃, and the curing time is 96 h.
Example four:
the utility model provides a preparation method of sterilization type easily tears sealing cover film for preparation sterilization type easily tears sealing cover film, sterilization type easily tears sealing cover film includes the body, from outer to interior the body includes but not limited to printing basic unit and heat-seal layer, be equipped with one deck printing layer on the printing basic unit, the printing layer forms through the printing of cooking type printing ink, form through two ingredient polyurethane adhesive bonding between printing basic unit and the heat-seal layer, the printing basic unit is biaxial stretching polyester film, the heat-seal layer is curtain coating polypropylene, just the thickness of printing basic unit equals 7um, the thickness of heat-seal layer equals 65um, still be equipped with the intermediate level between printing basic unit and the heat-seal layer, the intermediate level is nylon, the thickness of intermediate level equals 25um, preparation method includes following steps:
the method comprises the following steps: preparing a printing base layer: the method comprises the following steps of (1) mounting a biaxially oriented polyester film on a unreeling frame of an intaglio printing press, coating ink on the surface of the biaxially oriented polyester film through the intaglio printing press, and drying the biaxially oriented polyester film, wherein the printing speed is 120M/min, and the drying temperature is 55 ℃;
step two: and (3) composite molding: and (2) loading the biaxially oriented polyester film prepared in the first step on a unreeling frame of a dry compound machine, compounding the biaxially oriented polyester film on nylon through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, compounding the nylon on casting polypropylene in sequence, and allowing the compounded composite film to enter a curing chamber for curing treatment, wherein the coating amount of the cooking type two-component polyurethane adhesive is 4.5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 110M/min, the curing temperature is 60 ℃, and the curing time is 96 h.
The printing base layer and the heat sealing layer are bonded together through gravure printing in the first step and dry compounding in the second step, the printing layer is printed by cooking type printing ink, so that the surface of the whole composite film has good high-temperature sterilization resistance, the composite film can be sterilized at the high temperature of 100-135 ℃ for 30-60 min, the sterilized product can be ensured not to change color, bags and folds are not broken, the stable quality of the product in the quality guarantee period is realized, the storage time of the product is greatly prolonged, the adopted printing ink, glue and materials are all compounded with food safety regulations, the composite film has great market prospect, social and economic benefits in the field of sterilization type medical appliances and health products, secondly, the heat sealing layer is arranged, a consumer can easily tear the covering film without other tools, the content can be easily taken out, meanwhile, the problems of wire drawing and tearing are not generated during tearing, the sealing position after tearing is clean and has no residue, the air tightness of the seal can be met while the tearing property is ensured.
And the appearance of the printed film is detected according to GB/T7707-2008 for the cover film prepared in the first, second, third and fourth embodiments; detecting the solvent residue according to the method required by GB/T10004-2008 'plastic composite film for packaging, bag dry method composite and extrusion composite', sealing PP and PE bottles, and cooking for 30 minutes at the temperature of 121 ℃ and 135 ℃ respectively, wherein the detection result is shown in the table I:
Figure BDA0002738090220000081
watch 1
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.

Claims (5)

1. The utility model provides a preparation method of sterilization type easily tears and seals epiphragma for preparing sterilization type easily tears and seals epiphragma, sterilization type easily tears and seals epiphragma includes the body, from outer to interior the body includes but not limited to printing basic unit and heat-seal layer, its characterized in that: the printing base layer is provided with a printing layer, the printing layer is formed by printing through cooking type ink, the printing base layer and the heat sealing layer are bonded through a double-component polyurethane adhesive, the printing base layer is an aluminum foil or a biaxial stretching polyester film, the heat sealing layer is polyethylene or cast polypropylene, and the preparation method comprises the following steps:
the method comprises the following steps: preparing a printing base layer: the printing base layer is arranged on an unreeling frame of an intaglio printing press, then printing ink is coated on the surface of the printing base layer through the intaglio printing press, and the printing base layer is dried, wherein the printing speed is not more than 120M/min, and the drying temperature is 40-85 ℃;
step two: and (3) composite molding: and (2) mounting the printing base layer prepared in the first step on a unreeling frame of a dry compound machine, compounding the printing base layer on a heat sealing layer through a cooking type two-component polyurethane adhesive, treating a solvent of the cooking type two-component polyurethane adhesive through an oven before compounding, and curing the compounded composite film in a curing chamber, wherein the coating quantity of the cooking type two-component polyurethane adhesive is 4-5 g/square meter, the coating speed of the cooking type two-component polyurethane adhesive is 80-120M/min, the curing temperature is 45-60 ℃, and the curing time is 90-144 h.
2. The method for preparing a sterile easy-to-tear sealing cover film according to claim 1, wherein the method comprises the following steps: when the printing basic unit is the aluminium foil, the thickness of printing basic unit equals 30 ~ 50um, the thickness of heat-seal layer equals 30 ~ 80um, and the compound face dyne value of heat-seal layer is not less than 38.
3. The method for preparing a sterile easy-to-tear sealing cover film according to claim 1, wherein the method comprises the following steps: when the printing base layer is a biaxially oriented polyester film, a middle layer is arranged between the printing base layer and the heat sealing layer, the thickness of the printing base layer is equal to 7-12 um, the surface tension value of the printing base layer is not lower than 52 dyne, the thickness of the heat sealing layer is equal to 30-80 um, and the composite surface dyne value of the heat sealing layer is not lower than 38.
4. The method for preparing a sterilization-type easy-to-tear sealing cover film according to claim 3, wherein: the middle layer is made of aluminum foil or nylon.
5. The method for preparing a sterilization type easy-to-tear sealing cover film according to claim 4, wherein: when the intermediate level is the aluminium foil, the thickness in intermediate level is 30 ~ 50um, when the intermediate level is nylon, the thickness in intermediate level is 15 ~ 25 um.
CN202011140514.9A 2020-10-22 2020-10-22 Preparation method of sterilization type easy-to-tear sealing cover film Pending CN112373151A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114603947A (en) * 2022-03-14 2022-06-10 湖南箔乐新材料科技有限公司 Embossed high-temperature easy-to-tear sealing film

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106927112A (en) * 2017-03-02 2017-07-07 浙江博升新材料有限公司 A kind of transparent sealed membrane for Easy tearing lid, preparation method and transparent Easy tearing lid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106927112A (en) * 2017-03-02 2017-07-07 浙江博升新材料有限公司 A kind of transparent sealed membrane for Easy tearing lid, preparation method and transparent Easy tearing lid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114603947A (en) * 2022-03-14 2022-06-10 湖南箔乐新材料科技有限公司 Embossed high-temperature easy-to-tear sealing film

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