CN113183436A - Label film and production method thereof - Google Patents
Label film and production method thereof Download PDFInfo
- Publication number
- CN113183436A CN113183436A CN202110646447.6A CN202110646447A CN113183436A CN 113183436 A CN113183436 A CN 113183436A CN 202110646447 A CN202110646447 A CN 202110646447A CN 113183436 A CN113183436 A CN 113183436A
- Authority
- CN
- China
- Prior art keywords
- label film
- layer
- hdpe
- ldpe
- label
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 101
- 238000001125 extrusion Methods 0.000 claims abstract description 45
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 33
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 33
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 31
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 31
- 229920006728 mPE Polymers 0.000 claims abstract description 22
- BLDFSDCBQJUWFG-UHFFFAOYSA-N 2-(methylamino)-1,2-diphenylethanol Chemical compound C=1C=CC=CC=1C(NC)C(O)C1=CC=CC=C1 BLDFSDCBQJUWFG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920001179 medium density polyethylene Polymers 0.000 claims abstract description 10
- 239000004701 medium-density polyethylene Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 130
- 238000010438 heat treatment Methods 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 32
- 239000002994 raw material Substances 0.000 claims description 23
- 239000012535 impurity Substances 0.000 claims description 17
- 239000002356 single layer Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000003851 corona treatment Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007639 printing Methods 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000012528 membrane Substances 0.000 description 11
- 238000012856 packing Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 235000013361 beverage Nutrition 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000002372 labelling Methods 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
-
- 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
- B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/28—Storing of extruded material, e.g. by winding up or stacking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a label film, which comprises an outer layer, a middle layer and an inner layer which are superposed; the outer layer, the middle layer and the inner layer respectively comprise at least two materials of HDPE, MDPE, LDPE and mPE; the outer layer, the middle layer and the inner layer are extruded into a whole by co-extrusion equipment; the thickness of the label film is 10-100 μm; the invention also provides a production method of the label film. The label film is low in cost and convenient to recycle; the production method of the label film adopts a co-extrusion technology to ensure that different materials are extruded together through the die head in a molten state to form a label film with a well-arranged multilayer structure, and the operation is simple and rapid, so that the label film is convenient to rapidly produce in a large scale, has low cost and is convenient to recycle.
Description
Technical Field
The invention relates to the field of packaging labels, in particular to a label film and a production method thereof.
Background
The label is a printed matter which is adhered to the outer side of a packing material and used for marking product information and publicizing culture of production enterprises, daily chemical products and beverage products (most of the packing materials of the daily chemical products and the beverage products are made of PET or HDPE) in daily life have huge demand on the label, the market competition of the daily chemical products and the beverage products is intensified day by day, in order to save cost, the production cost of the label needs to be reduced while ensuring the attraction of product packing, therefore, the label made of materials such as coated paper, synthetic paper and the like compounded by multiple layers of materials through adhesives appears, the cost of the label is low, the label is convenient to print and is used in a large range, but along with the popularization of the social environment-friendly concept, the manufacturing raw materials of the label are low in recoverability, the label is difficult to recover, and difficult to degrade, and environment pollution is easily caused; therefore, the related industry urgently needs a low-pollution recyclable environment-friendly label material.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a label film which is low in cost and convenient to recycle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a label film comprising an outer layer, a middle layer and an inner layer in superposed relation; the outer layer, the middle layer and the inner layer respectively comprise at least two materials of HDPE, MDPE, LDPE and mPE; the outer layer, the middle layer and the inner layer are extruded into a whole by co-extrusion equipment; the thickness of the label film is 10-100 μm.
Compared with the prior art, the label film disclosed by the invention has the following beneficial effects:
(1) the raw materials used in the invention are at least two materials of HDPE, MDPE, LDPE and mPE, the materials have low cost, which is beneficial to saving the cost of the label, and the materials are PE materials, which are convenient to recover, can reduce resource waste, and meet the requirements of environment friendliness, excellent performance, good aesthetic property and low cost;
(2) the outer layer, the middle layer and the inner layer of the label film are all made of PE materials, have higher glossiness and uniform thickness, are lighter and thinner compared with the touch feeling of other conventional labels, and after the label film is adhered to a package, the overall aesthetic property of the package is better, so that the buyer can feel the overall label-free feeling of a product;
(3) the existing other types of labels can form crystal points due to excessive heating and degradation in the processing process, and finally form white points on the labels to influence the product appearance printing effect, and the used raw materials are at least two materials of HDPE, MDPE, LDPE and mPE, and the processing temperatures of the raw materials are similar, so that the crystal points can be reduced, and the printing effect of the labels is improved;
(4) the three-layer material integrated into one piece of label membrane can ensure that the label membrane collects multiple performance as an organic whole, does not have the layering phenomenon, and the skin feels stronger, can highlight the whole aesthetic feeling of label, is convenient for paste the mark production to the packing material, and in addition, above-mentioned mode of setting also is convenient for when mistake appears in pasting the mark production process, tears the label easily and carries out the heavy subsides.
Preferably, the components of the outer layer at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-20%, and the weight percentage of the LDPE is 10-80%; the components of the middle layer at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-50%, and the weight percentage of the LDPE is 10-50%; the components of the inner layer at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-20%, and the weight percentage of the LDPE is 10-80%.
The outer layer, the middle layer and the inner layer are formed by adopting the materials in proportion, so that the label film disclosed by the invention has certain stiffness, soft texture, good attaching property, extrusion resistance, good moisture resistance and good die cutting property, is suitable for processing and cutting, is easy to attach to a soft package, and has good re-attaching property to a soft package.
Preferably, the inner layer comprises mPE in a weight percentage of 1-50%.
The strength, toughness, rigidity, heat and cold resistance, acid and alkali resistance and optical property of the mPE are excellent, the odor is low, and the addition of the mPE can improve the cracking resistance, the impact resistance, the tearing resistance and the safety of the outer layer.
Preferably, the mPE contained in the outer layer is an 8-carbon or 6-carbon mLLDPE.
Another object of the present invention is to provide a method for producing the above label film, comprising the steps of;
(1) the outer layer material, the middle layer material and the inner layer material which respectively comprise at least two of HDPE, MDPE, LDPE and mPE are respectively extruded and molded by three extrusion mechanisms to form three single-layer bodies;
(2) the three single-layer bodies share one die head and are molded into a whole through the die head;
the heating temperature of the extrusion mechanism is 150-190 ℃ and the heating temperature of the die head is 180-210 ℃.
Compared with the prior art, the production method of the label film adopts a co-extrusion technology, so that materials with different functionalities are extruded through a common die head in a molten state to form a label film with a well-arranged multilayer structure, and the operation is simple and rapid, so that the label film is convenient to rapidly produce on a large scale, has low cost and is convenient to recycle.
Preferably, step (1) comprises the following steps:
(a1) preparing materials: preparing raw materials according to the label film components;
(a2) feeding: respectively putting different raw materials into different hoppers according to a proportion, and fully mixing and stirring;
(a3) extruding: the solid material is melted into a melt in a flowing state by means of the external heating of the charging barrel and the shearing heat in the charging barrel, the melt is extruded under certain pressure, and three single-layer bodies are respectively extruded by the three extrusion main machines.
Preferably, in the step (a1), after the raw material is prepared, the raw material is subjected to vibration adsorption to remove impurities.
Step (a2) is to improve the cleanliness of the raw material by removing impurities by sieving the raw material in order to avoid the influence of impurities in the material on its properties.
Preferably, a filtering device is arranged in the extruding mechanism; in the step (a3), the filtering device filters and removes impurities from the extruded melt.
Through set up filter equipment in extrusion mechanism (extrusion opening) to carry out the edulcoration to the material of molten state, thereby filter the impurity that produces in impurity and the production process in the raw materials and get rid of, thereby ensure the neat and tidy degree of the product appearance that produces.
Preferably, the method further comprises the following steps:
(3) and (3) blowing: compressed air enters through an air passage and blows and expands the tube blank into a film tube;
(4) and (3) cooling: cooling air is blown to the periphery of the bubble tube directly through the air ring gap for cooling;
(5) traction and flattening: the film bubble passes through a herringbone guide plate and a clamping plate and is dragged and flattened by a traction clamping roller and a flattening roller;
(6) corona treatment: carrying out corona treatment on the outer layer of the film bubble;
(7) coiling: and rolling the single-layer film into a finished product.
Above-mentioned step (3) to (5), can be with the label membrane of appointed thickness specification size is stereotyped into from the membrane bubble of die head output, step (6) carry out the corona back to the label membrane, can improve the adhesive force of skin and printing ink to be convenient for follow-up printing to the skin, in addition, the customer can also be when using, to the inlayer corona treatment, the adhesion and the moist tiling of the adhesive of being convenient for, thereby the label of being convenient for to make by above-mentioned film closely adheres on the outsourcing.
Drawings
FIG. 1 is a schematic illustration of a label film;
FIG. 2 is an enlarged view under a microscope of a label film;
figure 3 is a schematic representation of the attachment of a label film to a wrapper.
Detailed Description
Embodiments of the present invention are described below with reference to the accompanying drawings:
example one
Referring to fig. 1 to 3, a label film 1 of the present embodiment includes an outer layer 2, a middle layer 3 and an inner layer 4 stacked together, wherein the outer side of the outer layer 2 is used for printing ink, and the inner layer 4 is adhered to the outer surface of a release paper type package 5; the outer layer 2, the middle layer 3 and the inner layer 4 respectively comprise at least two materials of HDPE, MDPE, LDPE and mPE; the thickness of the label film 1 is 10 to 100 μm.
The thickness ratio of the outer layer 2, the middle layer 3 and the inner layer 4 is as follows: 1-5:2-10:1-5.
The components of the outer layer 2 at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-20%, and the weight percentage of the LDPE is 10-80%; the components of the middle layer 3 at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-50%, and the weight percentage of the LDPE is 10-50%; the components of the inner layer 4 at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-20%, and the weight percentage of the LDPE is 10-80%.
The outer layer 2, the middle layer 3 and the inner layer 4 are composed of the materials according to the proportion, so that the label film 1 has certain stiffness, soft texture, good laminating property, extrusion resistance, good moisture resistance and good die cutting property, is suitable for processing and cutting, is easy to adhere to various hard package packing materials 5 such as plastic bottles and the like, and has good re-adhesion property for hard package packing.
The components of the outer layer 2 comprise mPE, wherein the weight percentage of the mPE is 1-50%; the mPE contained in the outer layer is a 6 carbon or 8 carbon mLLDPE.
The strength, toughness, rigidity, heat and cold resistance, acid and alkali resistance and optical property of the mPE are excellent, the odor is low, and the addition of the mPE can improve the cracking resistance, the impact resistance, the tearing resistance and the safety of the outer layer 2.
In this embodiment, the weight ratio of the components of the outer layer 2 is mLLDPE: HDPE: LDPE 1-3: 1-5: 12-17; the weight ratio of the components of the middle layer 3 is HDPE: LDPE 1-2: 1-2; the weight ratio of the components of the inner layer 4 is HDPE: LDPE 1-3: 7-9.
The outer layer 2, the middle layer 3 and the inner layer 4 are extruded into a whole through a common die head.
The three-layer material integrated into one piece of label membrane 1 can ensure that label membrane 1 collects multiple performance as an organic whole, does not have the layering phenomenon, and the skin feels stronger, can highlight the whole aesthetic feeling of label, is convenient for paste the mark production to packing material 5, and in addition, above-mentioned mode of setting also is convenient for when pasting the mark error in the production process, tears the label easily and carries out the heavy subsides.
A corona layer (not shown in the figure) is arranged outside the outer layer 2; a corona layer (not shown in the figure) is arranged outside the inner layer 4; the corona layer is formed by carrying out corona treatment on the outer side of the outer layer 2 and the outer side of the inner layer 4.
Carry out the corona back to the outer 2 outsides, can improve its adhesive force with printing ink to be convenient for follow-up printing outer 2, in addition, inlayer 4 is through the corona after, the adhesion of the adhesive of being convenient for, thereby the label of being convenient for to make by above-mentioned film closely laminates on the outsourcing.
Table 1: physical Properties of the inventive Label film
Compared with the prior art, the label film disclosed by the invention has the following beneficial effects:
(1) the raw materials used in the invention are at least two materials of HDPE, MDPE, LDPE and mPE, the materials have low cost, which is beneficial to saving the cost of the label, and the materials are PE materials, which are convenient to recover, can reduce resource waste, and meet the requirements of environment friendliness, excellent performance, good aesthetic property and low cost;
(2) the outer layer 2, the middle layer 3 and the inner layer 4 of the label film 1 are all made of PE materials, have higher glossiness and uniform thickness, are lighter and thinner compared with the touch feeling of other conventional labels, and after the label made by the invention is adhered to the packing material 5, the whole attractiveness of the packing material 5 is better, and the label-free feeling of the whole product of a buyer can be given;
(3) the existing other types of labels can form crystal points due to excessive heating and degradation in the processing process, and finally form 'white points' on the labels to influence the product appearance printing effect.
Example two
Another object of the present invention is to provide a method for using the label film of the first embodiment, which includes the following steps:
(1) taking materials: coiling part of the label film;
(2) printing: printing pictures and texts on the outer surface of the label film;
(3) cutting: die cutting is carried out on the label film by using a die to prepare a reel label comprising a plurality of labels;
(4) labeling: the roll label is placed in a labeler, and the individual labels on the roll label are cut and coated with an adhesive on the inner layer to adhere to the outer surface of the package.
Compared with the prior art, the application method of the label film has the advantages that the adopted label is convenient to print and cut, the texture is soft, the compatibility of the label film with the adhesive and PE packaging materials is good, the label film can be tightly attached to the PE packaging materials by only a small amount of adhesive, the use of the adhesive is saved, the labeling speed is increased, and the production cost required by labeling is reduced.
EXAMPLE III
Another object of the present invention is to provide a method for producing the label film of the first embodiment.
The production method is applied to co-extrusion equipment, the co-extrusion equipment is provided with three feeding mechanisms, three extrusion mechanisms and a die head, a filtering device is arranged in an extrusion port of each extrusion mechanism, and the extrusion mechanisms and the die head are provided with 7 heating zones.
The three extrusion mechanisms are respectively an extrusion mechanism A, an extrusion mechanism B and an extrusion mechanism C, wherein the extrusion mechanism A is used for outputting a molten inner layer material, the extrusion mechanism B is used for outputting a molten middle layer material, and the extrusion mechanism C is used for outputting a molten outer layer material.
The production method comprises the following steps:
(1) the outer layer material, the middle layer material and the inner layer material which respectively comprise at least two of HDPE, MDPE, LDPE and mPE are respectively extruded and molded by three extrusion mechanisms to form three single-layer bodies; the heating temperature of the extrusion mechanism is 150-190 ℃;
(2) the three single-layer bodies share one die head and are melted into a whole through the die head; the heating temperature of the die head is 180-210 ℃;
(3) and (3) blowing: compressed air enters through an air passage and blows and expands the tube blank into a film tube;
(4) and (3) cooling: cooling air is blown to the periphery of the bubble tube directly through the air ring gap for cooling;
(5) traction and flattening: the film bubble passes through a herringbone guide plate and a clamping plate and is dragged and flattened by a traction clamping roller and a flattening roller;
(6) corona treatment: carrying out corona treatment on the outer layer of the film bubble;
(7) coiling: and rolling the single-layer film into a finished product.
The step (1) comprises the following steps:
(a1) preparing materials: preparing raw materials according to the label film components;
(a2) feeding: respectively putting different raw materials into different hoppers according to a proportion, and fully mixing and stirring;
(a3) extruding: the solid material is melted into a melt in a flowing state by means of the external heating of the charging barrel and the shearing heat in the charging barrel, the melt is extruded under certain pressure, and three single-layer bodies are respectively extruded by the three extrusion main machines.
In the step (a1), after the raw material is prepared, the raw material is subjected to vibration adsorption to remove impurities.
Specifically, the equipment involved in the vibration adsorption impurity removal of the raw material comprises a vibration sieve tray (for removing dust and particle impurities) and a magnetic adsorber (for removing metal impurities), wherein the vibration sieve tray and the magnetic adsorber belong to the application of the prior art, and the vibration sieve tray and the magnetic adsorber are not discussed in detail herein.
Step (a2) in order to avoid the influence of impurities in the material on its properties, impurities can be removed by sieving the material to improve the cleanliness of the material
In step (a2), the central feeding system automatically meters the raw materials into the hopper of the extrusion mechanism according to the set ratio.
In the step (a3), the filtering device filters and removes impurities from the extruded melt.
Through set up filter equipment in extrusion mechanism (extrusion opening) to carry out the edulcoration to the material of molten state, thereby filter the impurity that produces in impurity and the production process in the raw materials and get rid of, thereby ensure the neat and tidy degree of the product appearance that produces.
Above-mentioned step (3) to (5), can be with the label membrane of appointed thickness specification size is stereotyped into from the membrane bubble of die head output, step (6) carry out the corona back to the label membrane, can improve the adhesive force of skin and printing ink to be convenient for follow-up printing to the skin, in addition, the customer can also be when using, to the inlayer corona treatment, the adhesion and the moist tiling of the adhesive of being convenient for, thereby the label of being convenient for to make by above-mentioned film closely adheres on the outsourcing.
Structural strength testing
The test purpose is as follows: and testing the relationship between the structural strength among the layers and the heating temperature of the extrusion mechanism and the heating temperature of the die head.
And (4) testing remarks: the results of the test on the label film of the present invention, in which one of the materials was heated, then adhered to the other material (at room temperature), and the peel strength was measured after cooling for 30min according to the ASTM D903-10 standard, are shown in the table below.
Table 2: outer layer structure strength test meter of label film
To summarize: according to the experimental data, after the heating temperature is higher than 120 ℃, the structural strength of the outer layer material and the middle layer material is increased; the structural strength of the outer layer material and the middle layer material after melting and cooling is increased gradually along with the increase of the heating temperature, wherein the increase speed of the structural strength is fastest when the heating temperature of the outer layer material is 150-190 ℃, and in addition, when the heating temperature of the outer layer material is more than 150 ℃, experimenters observe the material object, the fluidity of the outer layer material is improved, and the processing is suitable; after the heating temperature is higher than 190 ℃, the increasing speed of the structural strength is slowed down, and after the heating temperature is higher than 200 ℃, an experimenter observes the material object, and the whitening of the outer layer material at the moment is found, so that the attractiveness of the material is obviously reduced.
Table 3: inner layer structure strength test meter of label film
Summary 1: according to the experimental data, after the heating temperature is higher than 120 ℃, the structural strength of the outer layer material and the middle layer material is increased; the structural strength of the melted and cooled inner layer material and the middle layer material is increased gradually along with the increase of the heating temperature, and when the heating temperature of the inner layer material is more than 160 ℃, experimenters observe the material object, so that the fluidity of the inner layer material is improved, and the processing is suitable; when the heating temperature is higher than 200 ℃, the increasing speed of the structural strength is reduced.
Conclusions from the poor comparison of table 1 and table 2:
(1) compared with the outer layer material, the inner layer material has more HDPE content, so that the inner layer material has better high temperature resistance;
(2) when the heating temperature is 190-210 ℃, the peeling strength of the inner layer material and the middle layer material is close to that of the outer layer material and the middle layer material;
(3) in order to avoid the performance reduction of the outer layer material, the production heating temperature is controlled below 200 ℃;
(4) the proportions of the raw materials in the inner layer material and the middle layer material are close, so that the heating temperature of the middle layer material can be predicted according to the test data in the table 2.
In practical applications, the heating parameters of the heating zones of the extrusion mechanism and the die head are set as shown in table 1 below:
table 4: heating parameters (unit: degree centigrade) of heating zone of extrusion mechanism and die head
Summary 1: in order to avoid long-time high-temperature melting of the three-layer material, crystal points or cracking and aging caused by excessive heating, the heating temperatures of the first heating area and the second heating area of the three extrusion mechanisms are set to be lower than those of other heating areas, and the heating temperatures of the third heating area to the fifth heating area are set to be lower than those of the sixth heating area and the seventh heating area, so that the situation that the three-layer material is melted is avoided, the situation that the three-layer material generates polycrystal points to influence the fusion effect of the subsequent three-layer material and influence the printing effect of the outer layer is avoided, meanwhile, the loss of energy can be reduced by heating in a sub-area mode, and the effects of energy conservation and environmental protection are achieved.
To summarize 2: because the relative thickness of middle level is thicker than skin and inlayer, and the surface need fuse with skin material and inlayer material about the middle level, therefore its extrusion capacity is more relatively, and the requirement of plastify degree is also higher, and extrusion mechanism B sets up the relatively high temperature than extrusion mechanism A and extrusion mechanism C, makes middle level material mobility good, can reduce the production of brilliant point, also can fuse with skin material and inlayer material and form the label membrane that the permeability is good, the fine and smooth no line in surface.
To summarize 3: the three extruding mechanisms are used for respectively heating the three layers of materials, so that the three layers of materials can reach the optimal temperature processing temperature when entering the die head, and the layers can be bonded effectively to form a multilayer sealing strip-shaped hierarchical structure.
To summarize 4: the heating temperature of the sixth heating area and the seventh heating area of the three extrusion mechanisms is set to be higher than that of other heating areas and is stabilized at 170-178 ℃, so that the outer layer material and the inner layer material are ensured to form a mixture which is melted uniformly and flow out of the extrusion mechanisms, and the use performance of the outer layer material and the inner layer material of the finished product is ensured to be stable.
To summarize 5: the die head adopts a two-stage heating method to ensure that the three layers of materials are gradually fused along with the temperature rise.
Compared with the prior art, the production method of the label film adopts a co-extrusion technology, so that materials with different functionalities are extruded through a common die head in a molten state to form a well-arranged multilayer structure, the operation is simple and rapid, and the label film is convenient to rapidly produce in a large scale, has low cost and is convenient to recycle.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. A label film characterized by: comprises an outer layer, a middle layer and an inner layer which are superposed; the outer layer, the middle layer and the inner layer respectively comprise at least two materials of HDPE, MDPE, LDPE and mPE; the outer layer, the middle layer and the inner layer are extruded into a whole by co-extrusion equipment; the thickness of the label film is 10-100 μm.
2. The label film as claimed in claim 1, wherein the outer layer comprises at least HDPE and LDPE, the HDPE being 10-20% by weight, the LDPE being 10-80% by weight;
the components of the middle layer at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-50%, and the weight percentage of the LDPE is 10-50%;
the components of the inner layer at least comprise HDPE and LDPE, wherein the weight percentage of the HDPE is 10-20%, and the weight percentage of the LDPE is 10-80%.
3. The label film of claim 2 wherein the components of said inner layer comprise mPE, with the mPE being present in an amount of 1-50% by weight.
4. The label film according to claim 3, wherein the mPE comprised in the outer layer is a 8 carbon or 6 carbon mLLDPE.
5. A method of producing the label film of any one of claims 1 to 4, comprising the steps of;
(1) the outer layer material, the middle layer material and the inner layer material which respectively comprise at least two of HDPE, MDPE, LDPE and mPE are respectively extruded and molded by three extrusion mechanisms to form three single-layer bodies;
(2) the three single-layer bodies share one die head and are molded into a whole through the die head;
the heating temperature of the extrusion mechanism is 150-190 ℃ and the heating temperature of the die head is 180-210 ℃.
6. The method for producing a label film according to claim 5, wherein the step (1) comprises the steps of:
(a1) preparing materials: preparing raw materials according to the label film components;
(a2) feeding: respectively putting different raw materials into different hoppers according to a proportion, and fully mixing and stirring;
(a3) extruding: the solid material is melted into a melt in a flowing state by means of the external heating of the charging barrel and the shearing heat in the charging barrel, the melt is extruded under certain pressure, and three single-layer bodies are respectively extruded by the three extrusion main machines.
7. The method for producing a label film according to claim 6, wherein in the step (a1), the raw material is prepared and then subjected to vibration adsorption to remove impurities.
8. The method for producing a label film according to claim 6, wherein a filter device is provided in the extruding mechanism;
in the step (a3), the filtering device filters and removes impurities from the extruded melt.
9. The method for producing a label film according to any one of claims 5 to 8, further comprising the steps of:
(3) and (3) blowing: compressed air enters through an air passage and blows and expands the tube blank into a film tube;
(4) and (3) cooling: cooling air is blown to the periphery of the bubble tube directly through the air ring gap for cooling;
(5) traction and flattening: the film bubble passes through a herringbone guide plate and a clamping plate and is dragged and flattened by a traction clamping roller and a flattening roller;
(6) corona treatment: carrying out corona treatment on the outer layer of the film bubble;
(7) coiling: and rolling the single-layer film into a finished product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021100192073 | 2021-01-07 | ||
| CN202110019207 | 2021-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113183436A true CN113183436A (en) | 2021-07-30 |
Family
ID=76872034
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110468260.1A Pending CN113146993A (en) | 2021-01-07 | 2021-04-28 | Method for producing stretched label film |
| CN202110646447.6A Pending CN113183436A (en) | 2021-01-07 | 2021-06-10 | Label film and production method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110468260.1A Pending CN113146993A (en) | 2021-01-07 | 2021-04-28 | Method for producing stretched label film |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN113146993A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113619238A (en) * | 2021-08-10 | 2021-11-09 | 佛山市南海利达印刷包装有限公司 | Composite film, packaging bag and production method thereof |
| CN113619239A (en) * | 2021-08-10 | 2021-11-09 | 佛山市南海利达印刷包装有限公司 | Composite film and packaging bag and production method thereof |
| CN118856113A (en) * | 2024-09-24 | 2024-10-29 | 爱康企业集团(浙江)有限公司 | A HDPE water supply and drainage plastic pipe system for dredging |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109493716A (en) * | 2018-11-15 | 2019-03-19 | 永新股份（黄山）包装有限公司 | A kind of clear PE label film and its production method |
| CN109532177A (en) * | 2018-12-28 | 2019-03-29 | 广东超维塑料薄膜有限公司 | A kind of three-layer co-extruded polyethylene label film and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166509C (en) * | 1999-08-26 | 2004-09-15 | 南亚塑胶工业股份有限公司 | Manufacture of three-layer co-squeezed and dual-axis extended polypropylene paper and transparent film as label in model |
-
2021
- 2021-04-28 CN CN202110468260.1A patent/CN113146993A/en active Pending
- 2021-06-10 CN CN202110646447.6A patent/CN113183436A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109493716A (en) * | 2018-11-15 | 2019-03-19 | 永新股份（黄山）包装有限公司 | A kind of clear PE label film and its production method |
| CN109532177A (en) * | 2018-12-28 | 2019-03-29 | 广东超维塑料薄膜有限公司 | A kind of three-layer co-extruded polyethylene label film and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113619238A (en) * | 2021-08-10 | 2021-11-09 | 佛山市南海利达印刷包装有限公司 | Composite film, packaging bag and production method thereof |
| CN113619239A (en) * | 2021-08-10 | 2021-11-09 | 佛山市南海利达印刷包装有限公司 | Composite film and packaging bag and production method thereof |
| CN118856113A (en) * | 2024-09-24 | 2024-10-29 | 爱康企业集团(浙江)有限公司 | A HDPE water supply and drainage plastic pipe system for dredging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113146993A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113183436A (en) | Label film and production method thereof | |
| CN100534786C (en) | Paper plastic glue-free composite on line repeated spraying bidirectional stretching polypropylene film and its preparation method | |
| CN110065270B (en) | High-sealing-performance multi-channel packaging composite film and production process thereof | |
| JP5036706B2 (en) | Shrink film | |
| CN1638950A (en) | Cross-laminated sheet consisting of oriented film layers, method for its manufacture and coextrusion die suitable for use in the method | |
| CN102234956A (en) | Processing technologies of PE (polyethylene) coated paper and release paper | |
| CN110065281A (en) | A kind of BOPP two-sided heat-sealing film and preparation method thereof | |
| JP2016521372A (en) | Label for in-mold molding and plastic container with label using the same | |
| CN111688319A (en) | BOPP film for in-film labeling and preparation method thereof | |
| CN103223759A (en) | Biaxially oriented polypropylene hot-pressing film and its making process | |
| CN112895649A (en) | Four-layer co-extrusion polyethylene cast film and production method thereof and medical packaging bag | |
| CN109605881B (en) | Sealing film for UHT paper aluminum plastic liquid packaging material and preparation method thereof | |
| CN201587630U (en) | Extinction blocking five-layer coextruded composite film | |
| CN114055889A (en) | All-plastic composite toothpaste tube sheet suitable for recycling and production method thereof | |
| CN102416748A (en) | Plastic base material film for food packaging and processing technology thereof | |
| CN214354341U (en) | Processing system of high-barrier film | |
| CN106671529A (en) | Biaxially stretched polypropylene touch film | |
| CN207954910U (en) | Surface layer is the biaxial tension nylon co-extrusion film of polyester | |
| JP3159097U (en) | Bulletin board | |
| CN112477341B (en) | Recyclable high-oxygen-resistance film and preparation method thereof | |
| CN116580631A (en) | A kind of in-mold label film applied to droplet flattening and its preparation method and application | |
| CN115056560A (en) | A kind of preparation technology of medicinal high friction composite membrane | |
| CN117507440A (en) | Preparation method of aluminum-plastic composite sheet with aluminum foil easy to separate and recycle after use | |
| CN202016241U (en) | Biaxially oriented polypropylene (Bopp) 15-micron double-side corona aluminized substrate film | |
| CN202123761U (en) | Multifunctional biaxial tension polypropylene hot-sealing film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 528211 Workshop B, No.1 Fuda Road, Baixi Science and Technology Industrial Park, Xiqiao Town, Nanhai District, Foshan City, Guangdong Province Applicant after: Foshan Lida Packaging New Materials Co.,Ltd. Address before: No.1 Fuda Road, Xiqiao Technology Industrial Park, Nanhai District, Foshan City, Guangdong Province Applicant before: LD PACKAGING Co.,Ltd. Country or region before: China |
|
| CB02 | Change of applicant information |