CN111267445B - Composite film label suitable for high-speed packaging and preparation method thereof - Google Patents
Composite film label suitable for high-speed packaging and preparation method thereof Download PDFInfo
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- CN111267445B CN111267445B CN202010146644.7A CN202010146644A CN111267445B CN 111267445 B CN111267445 B CN 111267445B CN 202010146644 A CN202010146644 A CN 202010146644A CN 111267445 B CN111267445 B CN 111267445B
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- B32B2519/00—Labels, badges
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
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Abstract
The invention relates to a composite film label suitable for high-speed packaging and a preparation method thereof, belonging to the technical field of label packaging, wherein the composite film comprises an outer layer and an inner layer, the film is placed in a printing oven and is subjected to inner printing, the outer layer is an extinction BOPP printing film, the film is placed in the printing oven and is subjected to inner printing, the inner layer is a pearly-luster BOPP film, and the film is placed in the printing oven and is subjected to inner printing, the thickness ratio of the outer layer to the inner layer is 1: 1; the extinction BOPP printing film is prepared by printing an extinction BOPP film. According to the invention, the initial temperature is reduced on the premise of ensuring drying by controlling the temperature of the printing oven, so that the curling phenomenon of the raw materials due to higher temperature is avoided, and the composite film label prepared by the invention can improve the layout design content of the label, give brand-new color experience to consumers and improve the grade of food packaging.
Description
Technical Field
The invention relates to the technical field of label packaging, in particular to a composite film label suitable for high-speed packaging and a preparation method thereof.
Background
The development of label printing technology is further promoted due to the wide application of labels and the continuous development of label varieties. The label printing covers all printing modes such as flat, convex, concave, net and the like, and the application conditions of various countries are different.
The packaging speed of the label film in the current market is very high, the packaging speed reaches 24000-72000 sheets/hour, the quality requirement on the label film is very high, the film surface needs to be absolutely flat and cannot have a curling phenomenon, and the single-layer film label in the current market is common because the single-layer film label is simple in production process control, does not have a composite process and does not have the curling phenomenon. The material structure of individual layer membrane label is individual layer pearly-lustre BOPP, because individual layer pearly-lustre membrane is opaque, so the printing mode must adopt the table seal printing, but the table seal printing is relatively poor in the aspect of the color embodiment, and the printing ink of individual layer membrane can contact with the staff, has certain safe risk. If the two layers of composite film labels are adopted, the inner printing can be realized, the layout design content is richer, and the appearance is more graded than that of a single layer film label; however, because the existing composite film label is a two-layer composite film, the situation that the difference of tensile strength between two layers of materials is very large exists, if the production process is improperly controlled, the phenomenon of film surface curling is easily generated, and further, the labeling machine of a customer cannot be used.
Disclosure of Invention
In order to solve the technical problem of monotonous layout design of single-layer film labels, the invention aims to provide a composite film label suitable for high-speed packaging.
In order to realize the purpose of the invention, the invention adopts the following technical scheme: a composite film label suitable for high-speed packaging comprises an outer layer and an inner layer, wherein the outer layer is a delustering BOPP printing film, the inner layer is a pearly-luster BOPP film, and the thickness ratio of the outer layer to the inner layer is 1: 1.
Preferably, the matt BOPP printing film is prepared by printing a matt BOPP film.
Preferably, the extinction BOPP film is 25 mu extinction BOPP of Zhongshan Yongning, and the pearly-luster BOPP film is 25 mu pearly-luster BOPP of Tianjin Tongkang.
Preferably, the outer layer and the inner layer are compounded by adopting a dry compounding process.
It is another object of the present invention to provide a method of making a composite film label suitable for high speed packaging, comprising the steps of:
s1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to obtain an extinction BOPP printing film;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, and then putting the compounded film into a curing chamber for curing to prepare the composite film.
Preferably, the temperature of each color in the step S1 is controlled between 40 ℃ and 45 ℃; the printing tension is 90N-110N.
Preferably, the adhesive patch used in step S2 is gao lian 3050A.
Preferably, the preheating temperature in the step S2 is 35 ℃ and the bonding temperature is 50 ℃; the first, second, and third oven temperatures of the dry laminator used in step S2 were 50 ℃, 60 ℃, and 70 ℃.
Preferably, the tension of the matt BOPP printed film is 32N; tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, and the tension of rolling is 120N.
Preferably, the curing temperature is 45 ℃ and the curing time is 24 hours.
The invention has the beneficial effects that:
1. because high-speed packaging requires that finished films cannot be stretched, the unit size of a product must be controlled within a standard range, three indexes of tensile strength, breaking force and thermal shrinkage rate must be considered for material selection, namely, the tensile strength, the breaking force and the thermal shrinkage rate of two films mutually attached should be as close as possible, so that separation during printing is prevented; the thickness of the extinction BOPP printing film and the thickness of the pearly-luster BOPP film are both 25 mu m, the two thicknesses are consistent, and the tensile strength, the breaking force and the thermal shrinkage rate are all relatively close, so that the condition of film surface curling in the process of preparing the composite film is greatly reduced, and the composite film is more suitable for preparing composite film labels for high-speed packaging.
2. According to the invention, by controlling the temperature of the printing oven, the initial temperature is reduced on the premise of ensuring drying, the unit size and the flatness of the printing film and the composite film are ensured, so that the curling phenomenon of the raw materials due to higher temperature is avoided, and the composite film label prepared by the method can improve the layout design content of the label, give brand new color experience to consumers and improve the grade of food packaging.
3. The extinction BOPP film has a matte effect as an outer layer and is soft in hand feeling; the pearlescent BOPP film can obstruct the permeation of the outer color as the inner layer, and the outer color can not be seen after being packaged on the outer back of the product, thereby meeting the requirement of high-speed packaging of customers, improving the production efficiency, accumulating the experience of controlling the unit size and stabilizing the production process.
4. The invention grasps the material attribute through the comparison of various materials, and finds different production processes, determines the best process center line and standardizes the production process.
5. According to the double-layer composite film label prepared by the invention, the printing ink is in the middle of the film, and cannot be in direct contact with a product, so that the label has no safety risk.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
S1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to prepare an extinction BOPP printing film, wherein the temperature of each color is set to be 40 ℃, the printing tension is 90N, and the tension of the extinction BOPP printing film is 32N;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, wherein the used adhesive is a high union 3050A, and then placing the compounded film into a curing chamber for curing to prepare the composite film.
The preheating temperature in the S2 is 35 ℃, and the bonding temperature is 50 ℃; the temperature of a first area, the temperature of a second area and the temperature of a third area of an oven of the dry compound machine are respectively 50 ℃, 60 ℃ and 70 ℃, and the tension of the extinction BOPP printing film is 32N; tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, the winding tension is 120N, the curing temperature is 45 ℃, and the curing temperature is 24 hours.
The grade of the extinction BOPP film is a 25 mu extinction BOPP film of Zhongshan Yongning, and the grade of the pearly-luster BOPP film is a 25 mu pearly-luster BOPP film of Tianjin Tongkang, wherein mu is mu m and represents the thickness of the film.
Example 2
S1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to obtain an extinction BOPP printing film, wherein the temperature of each color is set to be 43 ℃, the printing tension is 100N, and the tension of the extinction BOPP printing film is 32N;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, wherein the used adhesive is a high union 3050A, and then placing the compounded film into a curing chamber for curing to prepare the composite film.
The preheating temperature in the S2 is 35 ℃, and the bonding temperature is 50 ℃; the temperature of a first area, the temperature of a second area and the temperature of a third area of an oven of the dry compound machine are respectively 50 ℃, 60 ℃ and 70 ℃, and the tension of the extinction BOPP printing film is 32N; tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, the winding tension is 120N, the curing temperature is 45 ℃, and the curing temperature is 24 hours.
The grade of the extinction BOPP film is 25u extinction BOPP film of Zhongshan Yongning, the grade of the pearly-luster BOPP film is 25u pearly-luster BOPP film of Tianjin Tongkang, and mu is mu m and represents the thickness of the film.
Example 3
S1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to prepare an extinction BOPP printing film, wherein the temperature of each color is set to be 45 ℃, the printing tension is 110N, and the tension of the extinction BOPP printing film is 32N;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, wherein the used adhesive is a high union 3050A, and then placing the compounded film into a curing chamber for curing to prepare the composite film.
The preheating temperature in the S2 is 35 ℃, and the bonding temperature is 50 ℃; the temperature of a first area, the temperature of a second area and the temperature of a third area of an oven of the dry compound machine are respectively 50 ℃, 60 ℃ and 70 ℃, and the tension of the extinction BOPP printing film is 32N; the tension of the pearly-lustre BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, the winding tension is 120N, the curing temperature is 45 ℃, and the curing temperature is 24 hours.
The grade of the extinction BOPP film is 25u extinction BOPP film of Zhongshan Yongning, the grade of the pearly-luster BOPP film is 25u pearly-luster BOPP film of Tianjin Tongkang, and mu is mu m and represents the thickness of the film.
Comparative example 1
S1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to obtain an extinction BOPP printing film, wherein the temperature of each color is set to be 43 ℃, the printing tension is 100N, and the tension of the extinction BOPP printing film is 32N;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, wherein the used adhesive is a high union 3050A, and then placing the compounded film into a curing chamber for curing to prepare the composite film.
The preheating temperature in the S2 is 35 ℃, and the bonding temperature is 50 ℃; the temperature of a first area, the temperature of a second area and the temperature of a third area of an oven of the dry compound machine are respectively 50 ℃, 60 ℃ and 70 ℃, and the tension of the extinction BOPP printing film is 32N; tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, the winding tension is 120N, the curing temperature is 45 ℃, and the curing temperature is 24 hours.
The grade of the extinction BOPP film is 25u extinction BOPP of Hefei Gufeng, and the grade of the pearly-luster BOPP film is 25u pearly-luster BOPP of Zhongshan Yongning.
Comparative example 2
S1, printing process: putting the extinction BOPP film into a printing oven, and printing by inner printing to obtain an extinction BOPP printing film, wherein the temperature of each color is set to be 50 ℃, the printing tension is 110N, and the tension of the extinction BOPP printing film is 90N;
s2, compounding: and (4) compounding the extinction BOPP printing film prepared in the step (S1) and the pearly-luster BOPP film through a dry compounding process, wherein the used adhesive is a high union 3050A, and then placing the compounded film into a curing chamber for curing to prepare the composite film.
Preheating temperature in S2 is 45 ℃, and bonding temperature is 55 ℃; the temperature of a first area, the temperature of a second area and the temperature of a third area of a drying oven of the dry compound machine are respectively 60 ℃, 70 ℃ and 80 ℃, and the tension of the extinction BOPP printing film is 90N; tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 50N, the winding tension is 120N, the curing temperature is 50 ℃, and the curing temperature is 24 h.
The grade of the extinction BOPP film is 25u extinction BOPP of Zhongshan Yongning, and the grade of the pearly-lustre BOPP film is 25u pearly-lustre BOPP of Tianjin Tongkang.
According to the data test results in the table above, the tensile strength TD of the matt BOPP film in example 1 is 34, the MD is 20, the tensile strength TD of the pearlescent BOPP film is 25, the MD is 14, and the tensile strength values of the two films are relatively close. The tensile strength TD value of the extinction BOPP film in the comparative example 1 is 41, the MD value is 24, the tensile strength TD value of the pearly-luster BOPP film is 11, the MD value is 7, the tensile strength TD value of the extinction BOPP film in the comparative example 2 is 33, the MD value is 22, the tensile strength TD value of the pearly-luster BOPP film is 11, the MD value is 7, and the tensile strength values of the two comparative examples are obviously different;
in example 1, the thermal shrinkage values of the matt BOPP film are 0.0000%, 0.1333%, 1.1667% and 3.4667% at different temperatures, the thermal shrinkage values of the pearlescent BOPP film are 0.0000%, 0.2233%, 1.1333% and 4.6190% at different temperatures, and the thermal shrinkage values of the two films are relatively close to each other at different temperatures; the heat shrinkage values of the matt BOPP film in the comparative example 1 are 0.0000%, 0.2366%, 3.1667% and 6.63333% at different temperatures, the heat shrinkage values of the matt BOPP film in the comparative example 1 are 0.0000%, 0.4333% and 6.4127% at different temperatures, the heat shrinkage values of the matt BOPP film in the comparative example 2 are 0.0000%, 0.2100%, 2.9667% and 5.7333% at different temperatures, the heat shrinkage values of the matt BOPP film in the comparative examples are 0.0000%, 0.4333% and 6.4127% at different temperatures, the heat shrinkage values of the two comparative examples are greatly different at different temperatures and are greatly different at 80 degrees, so that the unit size of the composite film is affected, and the obtained product quality is poor.
Because the printing film (extinction BOPP film) has larger heat shrinkage, when the equipment in the printing process is longer and passes through the oven for a plurality of times, the requirement on the heat shrinkage of the extinction BOPP film in the printing material is higher; when the thermal shrinkage rate is higher, the composite film is easy to shrink by heat, the deformation is relatively larger, the tensile strength and the breaking force of the two films are greatly different from each other, so that the flatness of the compounded finished film is lower, and the packaging speed is also greatly influenced. Because the heat shrinkage rate in the embodiment 1 is smaller than that in the comparative examples 1 and 2, and the tensile strength and the breaking force of the two films are relatively close, the invention is more suitable for preparing the composite film label for high-speed packaging.
The above embodiments are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A preparation method of a composite film label suitable for high-speed packaging is characterized by comprising the following steps: the composite film comprises an outer layer and an inner layer, wherein the outer layer is a delustering BOPP printing film, the inner layer is a pearly-luster BOPP film, and the thickness ratio of the outer layer to the inner layer is 1: 1;
the preparation method comprises the following steps:
s1, printing process: putting the extinction BOPP film into a printing oven, and carrying out inner printing to obtain an extinction BOPP printing film;
s2, compounding: compounding the extinction BOPP printing film prepared in the step S1 with the pearly-luster BOPP film through a dry compounding process, and then putting the compounded film into a curing chamber for curing to prepare a composite film;
the temperature of each color in the step S1 is controlled to be between 40 ℃ and 45 ℃; the printing tension is 90N-110N;
the adhesive patch used in step S2 is a gao lian 3050A;
the preheating temperature in the step S2 is 35 ℃, and the bonding temperature is 50 ℃; the first-zone temperature, the second-zone temperature and the third-zone temperature of the oven of the dry compound machine used in the step S2 are respectively 50 ℃, 60 ℃ and 70 ℃;
the tension of the extinction BOPP printing film is 32N; the tension of the pearlescent BOPP film is 110N; the tension of an oven in the dry-type composite process is 25N, and the winding tension is 120N;
the curing temperature is 45 ℃, and the curing time is 24 hours;
the grade of the extinction BOPP film is 25 mu extinction BOPP of Zhongshan Yongning, and the grade of the pearly-luster BOPP film is 25 mu pearly-luster BOPP of Tianjin Tongkang.
2. A method of making a composite film label suitable for high speed packaging according to claim 1 wherein: the extinction BOPP printing film is prepared by printing an extinction BOPP film.
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