CN117777872A - Ultrathin enhanced BOPP digital precoating film, preparation method and application - Google Patents
Ultrathin enhanced BOPP digital precoating film, preparation method and application Download PDFInfo
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- CN117777872A CN117777872A CN202311663566.8A CN202311663566A CN117777872A CN 117777872 A CN117777872 A CN 117777872A CN 202311663566 A CN202311663566 A CN 202311663566A CN 117777872 A CN117777872 A CN 117777872A
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- 229920006378 biaxially oriented polypropylene Polymers 0.000 title claims abstract description 67
- 239000011127 biaxially oriented polypropylene Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 76
- 239000004831 Hot glue Substances 0.000 claims abstract description 56
- 229920001577 copolymer Polymers 0.000 claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 25
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 230000004048 modification Effects 0.000 claims abstract description 4
- 238000012986 modification Methods 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 21
- 238000003851 corona treatment Methods 0.000 claims description 19
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 13
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 13
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 claims description 13
- 238000013329 compounding Methods 0.000 claims description 11
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000010345 tape casting Methods 0.000 claims description 9
- 238000009966 trimming Methods 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000002985 plastic film Substances 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 229920001038 ethylene copolymer Polymers 0.000 claims description 2
- -1 ethylene octenyl ester Chemical class 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000003292 glue Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002313 adhesive film Substances 0.000 description 4
- 239000007888 film coating Substances 0.000 description 3
- 238000009501 film coating Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The invention belongs to the technical field of film materials, and particularly relates to an ultrathin enhanced BOPP digital precoating film, a preparation method and application thereof; the ultra-thin enhanced BOPP digital precoating film comprises a substrate layer and a hot melt adhesive layer, wherein the preparation raw materials of the hot melt adhesive layer comprise the following components in parts by weight: 10-20 parts of modified ethylene-octene copolymer, 70-90 parts of ethylene-vinyl acetate copolymer and 3-10 parts of high polymer copolymer; wherein the modified ethylene-octene copolymer is obtained by grafting modification of maleic anhydride and ethylene-octene copolymer. The hot melt adhesive layer can be directly bonded with the substrate layer without coating glue in the middle of the substrate, so that the phenomena of uneven force value, film lifting and air bubbles caused by uneven glue coating and uneven ozone in the production process are avoided.
Description
Technical Field
The invention belongs to the technical field of film materials, and particularly relates to an ultrathin enhanced BOPP digital precoating film, a preparation method and application.
Background
The pre-coating film refers to a process of pre-coating the plastic film with glue, rewinding and then compounding with paper printing. The hot melt adhesive is generally melt-extruded and coated on a film by a precoating film processing factory according to specifications, breadth and the like, rewound and then selected by a user manufacturer, and then compounded with a printed matter.
The film coating, namely the film pasting, is a processing technology of coating the plastic film with an adhesive, and bonding the plastic film and the paper printed product after heating and pressurizing to form a paper-plastic integrated product. The surface of the coated printed matter is smoother and brighter due to the fact that a thin and transparent plastic film is added on the surface, so that the glossiness and the fastness of the printed matter are improved, the image-text color is more vivid, the stereoscopic impression is achieved, and the effects of water resistance, pollution resistance, wear resistance, folding resistance, chemical corrosion resistance and the like are achieved.
With the continuous improvement of market demands, the product after film coating is required to have basic effects of water resistance, dirt blocking and the like, and is required to have more excellent color sense and color reduction degree, so that the color tone of the printed matter after film coating is not lost and is more saturated. The precoating products in the current market are extremely easy to have the phenomena of insufficient fastness after coating, foaming, easy yellowing and the like, and have great influence on the quality of the products; along with the continuous compression of the market competition Yu Lie, the precoated film is required to be gradually thinned, the original requirements of film lifting, degumming and the like are met, and the production requirement difficulty of the product is gradually increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an ultrathin enhanced BOPP digital precoating film, a preparation method and application.
The aim of the invention can be achieved by the following technical scheme:
the ultra-thin enhanced BOPP digital precoating film comprises a substrate layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises the following preparation raw materials in parts by weight: 10-20 parts of modified ethylene-octene copolymer, 70-90 parts of ethylene-vinyl acetate copolymer and 3-10 parts of high polymer copolymer; wherein the modified ethylene-octene copolymer is obtained by grafting modification of maleic anhydride and ethylene-octene copolymer.
Preferably, the melt index of the modified ethylene-octene copolymer is 6-10g/10min at 190 ℃ and 2.16kg, wherein the content of ethylene octenyl ester is 14-18wt%.
Preferably, the ethylene-vinyl acetate copolymer has a melt index of 14-18g/10min at 190 ℃ under 2.16kg, wherein the content of vinyl acid ester is 16-20wt%.
Preferably, the high molecular copolymer is one or more of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer and copolymer of styrene and 2-methyl methacrylate.
Preferably, the substrate layer is a biaxially oriented polypropylene film without primer.
Preferably, the thickness of the substrate layer is 12-25 μm; the thickness of the hot melt adhesive layer is 3-8 mu m.
The preparation method of the ultra-thin enhanced BOPP digital precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing the modified ethylene-octene copolymer, the ethylene-vinyl acetate copolymer and the high molecular copolymer, and then carrying out melt extrusion through an extruder; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency and high-voltage treatment on the surface of the hot melt adhesive layer, and then trimming, thickness measuring and rolling to obtain the ultrathin enhanced BOPP digital precoating film.
Preferably, the temperature of the melt extrusion in step S2 is 205-230 ℃.
Preferably, the method comprises the steps of,the power of the high-frequency high-voltage corona treatment in the step S3 is 20-25W/m 2 。
The application of the ultra-thin enhanced BOPP digital precoating film in the field of paper-plastic film-coated packaging is provided.
The invention has the beneficial effects that:
1. according to the invention, the mixture of the modified ethylene-octene copolymer, the ethylene-vinyl acetate copolymer and the high polymer copolymer is selected as a raw material to prepare the hot melt adhesive layer, and the bottomless biaxially oriented polypropylene film is selected as a base material, so that the hot melt adhesive layer can be directly bonded with the base material layer, glue is not required to be coated in the middle of the base material, and the phenomena of uneven whole force value, film lifting, air bubbles and the like caused by uneven glue coating, uneven ozone and the like in the production process are avoided; the bond energy of the functional group of the hot melt adhesive layer is high, so that the problem of adhesive film degumming of a primer-free product is well solved; and the problem of yellowing of the precoated product after long-term placement can be fundamentally solved due to the characteristics of the ethylene-octene copolymer.
2. In the preparation process, the adsorption capacity of the surface of the hot melt adhesive layer is increased by high-frequency corona treatment of the hot melt adhesive layer, so that the bonding strength in the precoating film and the compound fastness of the precoating film to a printed product are further increased.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in the following in connection with several embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples, the biaxially oriented polypropylene film without primer was used under the trademark BOPP12, available from the company of the wind plastics industry, inc.
The ethylene-octene copolymer used was purchased from the dow chemical under the designation 8402.
The POE content in the ethylene-octene copolymer used was 16wt% and the melt index at 190℃and 2.16kg was 6-9g/10min.
The ethylene-vinyl acetate copolymer used was obtained from Han Huadao De, trade name 182L.
The EVA content in the ethylene-vinyl acetate copolymer is 20wt%, and the melt index under the conditions of 190 ℃ and 2.16kg is 13-16g/10min.
The ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, styrene and 2-methyl methacrylate were used, and were purchased from Sumitomo Japan under the designations SWA340, SWN150, SMA280 and PA330, respectively.
Example 1
An ultra-thin enhanced BOPP digital precoating film comprises a base coating-free substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 10 parts of modified ethylene-octene copolymer, 85 parts of ethylene-vinyl acetate copolymer, 5 parts of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, and a mixture of styrene and 2-methyl methacrylate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the enhanced BOPP digital precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing a copolymer mixture of modified ethylene-octene copolymer, ethylene-vinyl acetate copolymer and ethylene-butyl acrylate copolymer, ethylene-methyl methacrylate copolymer, styrene and 2-methyl methacrylate, and then carrying out melt extrusion at 230 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Trimming, thickness measuring and rolling to obtain the ultra-thin enhanced BOPP digital pre-manufactured productAnd (3) coating.
Example 2
An ultra-thin enhanced BOPP digital precoating film comprises a base coating-free substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 15 parts of modified ethylene-octene copolymer, 80 parts of ethylene-vinyl acetate copolymer, 5 parts of ethylene-butyl acrylate copolymer, ethylene-methyl methacrylate copolymer, and a mixture of styrene and 2-methyl methacrylate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the ultrathin enhanced BOPP digital precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing a mixture of a modified ethylene-octene copolymer, an ethylene-vinyl acetate copolymer, an ethylene-butyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, styrene and a 2-methyl methacrylate copolymer, and then carrying out melt extrusion at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And trimming, thickness measuring and rolling to obtain the ultra-thin reinforced BOPP digital precoating film.
Example 3
An ultra-thin enhanced BOPP digital precoating film comprises a base coating-free substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 20 parts of modified ethylene-octene copolymer, 75 parts of ethylene-vinyl acetate copolymer, 5 parts of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, and a mixture of styrene and 2-methyl methacrylate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the ultrathin enhanced BOPP digital precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing a mixture of a modified ethylene-octene copolymer, an ethylene-vinyl acetate copolymer, an ethylene-butyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, styrene and a 2-methyl methacrylate copolymer, and then carrying out melt extrusion at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And trimming, thickness measuring and rolling to obtain the ultra-thin reinforced BOPP digital precoating film.
Example 4
An ultra-thin enhanced BOPP digital precoating film comprises a base coating-free substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 15 parts of modified ethylene-octene copolymer, 75 parts of ethylene-vinyl acetate copolymer, 10 parts of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, and a mixture of styrene and 2-methyl methacrylate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the ultrathin enhanced BOPP digital precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing a mixture of a modified ethylene-octene copolymer, an ethylene-vinyl acetate copolymer, an ethylene-butyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, styrene and a 2-methyl methacrylate copolymer, and then carrying out melt extrusion at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And trimming, thickness measuring and rolling to obtain the ultra-thin reinforced BOPP digital precoating film.
Comparative example 1
A BOPP precoat film, which comprises a bottomless coating substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 95 parts of ethylene-vinyl acetate copolymer, 5 parts of a mixture of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, styrene and 2-methyl methacrylate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the BOPP precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing an ethylene-vinyl acetate copolymer and an ethylene-butyl acrylate copolymer, an ethylene-methyl methacrylate copolymer and a copolymer mixture of styrene and 2-methyl methacrylate, and then carrying out melt extrusion at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And trimming, thickness measuring and rolling to obtain the ultra-thin reinforced BOPP digital precoating film.
Comparative example 2
A BOPP precoat film, which comprises a bottomless coating substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 15 parts of modified ethylene-octene copolymer and 85 parts of ethylene-vinyl acetate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the BOPP precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing the modified ethylene-octene copolymer and the ethylene-vinyl acetate copolymer, and then carrying out melt extrusion at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And trimming, thickness measuring and rolling to obtain the ultra-thin reinforced BOPP digital precoating film.
Comparative example 3
A BOPP precoat film, which comprises a bottomless coating substrate layer and a hot melt adhesive layer which are sequentially arranged;
the hot melt adhesive layer comprises the following raw materials in parts by mass: 100 parts of ethylene-vinyl acetate copolymer.
The substrate layer is a biaxially oriented polypropylene film without bottom coating.
Wherein the thickness of the substrate layer is 12 μm; the thickness of the hot melt adhesive layer was 4. Mu.m.
The preparation method of the BOPP precoating film comprises the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, melting and extruding the ethylene-vinyl acetate copolymer at 220 ℃; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency high-voltage on the surface of the hot melt adhesive layer, wherein the power of the high-frequency high-voltage corona treatment is 20W/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Trimming, thickness measuring and winding to obtain the ultra-thin reinforced materialBOPP digital precoating film.
Performance testing
The precoated films prepared in examples 1 to 4 and comparative examples 1 to 3 were subjected to performance test, and the results are shown in Table 1:
TABLE 1
Note that: the peel strength 1 in the table refers to the peel strength between the hot melt adhesive layer of the precoating film and the biaxially oriented polypropylene film (BOPP) composite; the peeling strength 2 refers to the peeling strength between the hot melt adhesive layer and the paper compounding in the precoating film; the static value refers to the static value of the film in the winding process; as the adhesive layer is reduced below 10 mu m, each micron is reduced, the peeling strength is affected, in a primer-free product with the thickness of 4 mu m, the peeling strength represents the direct representation of whether the adhesive film is separated before the product is not used, and the adhesive film can be separated when the adhesive film is more than 0.03N/15mm, so that the downstream customer use is not affected. As can be seen from the data in the table, the precoating film of the invention has good peel strength, good film strength and better static electricity condition.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (10)
1. The ultrathin enhanced BOPP digital precoating film comprises a substrate layer and a hot melt adhesive layer and is characterized in that the hot melt adhesive layer comprises the following preparation raw materials in parts by weight: 10-20 parts of modified ethylene-octene copolymer, 70-90 parts of ethylene-vinyl acetate copolymer and 3-10 parts of high polymer copolymer; wherein the modified ethylene-octene copolymer is obtained by grafting modification of maleic anhydride and ethylene-octene copolymer.
2. The ultra-thin reinforced BOPP digital precoating film according to claim 1, wherein the modified ethylene-octene copolymer has a melt index of 6-10g/10min at 190 ℃ and 2.16kg, and wherein the content of ethylene octenyl ester is 14-18wt%.
3. The ultra-thin reinforced BOPP digital pre-film of claim 1, wherein the ethylene-vinyl acetate copolymer has a melt index of 14-18g/10min at 190 ℃ and 2.16kg, and wherein the vinyl acid ester content is 16-20wt%.
4. The ultra-thin reinforced BOPP digital pre-coat film of claim 1, wherein the high molecular copolymer is one or more of ethylene-butyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, and copolymer of styrene and 2-methyl methacrylate.
5. The ultra-thin reinforced BOPP digital pre-coat film of claim 1, wherein the substrate layer is a bottomless biaxially oriented polypropylene film.
6. The ultra-thin reinforced BOPP digital pre-film of claim 1, wherein the thickness of the substrate layer is 12-25 μm; the thickness of the hot melt adhesive layer is 3-8 mu m.
7. The preparation method of the ultra-thin enhanced BOPP digital precoating film is characterized by comprising the following steps:
s1, unreeling a biaxially oriented polypropylene film without a bottom coating;
s2, mixing the modified ethylene-octene copolymer, the ethylene-vinyl acetate copolymer and the high molecular copolymer, and then carrying out melt extrusion through an extruder; then compounding the film onto the surface of the bottomless biaxially oriented polypropylene film by a tape casting method to form hot melt adhesive;
s3, carrying out corona treatment after carrying out high-frequency and high-voltage treatment on the surface of the hot melt adhesive layer, and then trimming, thickness measuring and rolling to obtain the ultrathin enhanced BOPP digital precoating film.
8. The method according to claim 7, wherein the temperature of the melt extrusion in step S2 is 205 to 230 ℃.
9. The method according to claim 7, wherein the high-frequency high-voltage corona treatment in step S3 has a power of 20-25W/m 2 。
10. Use of an ultra-thin reinforced BOPP digital pre-coat film according to any one of claims 1-6 in the field of paper plastic film packaging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311663566.8A CN117777872A (en) | 2023-12-06 | 2023-12-06 | Ultrathin enhanced BOPP digital precoating film, preparation method and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311663566.8A CN117777872A (en) | 2023-12-06 | 2023-12-06 | Ultrathin enhanced BOPP digital precoating film, preparation method and application |
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| CN117777872A true CN117777872A (en) | 2024-03-29 |
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| CN202311663566.8A Pending CN117777872A (en) | 2023-12-06 | 2023-12-06 | Ultrathin enhanced BOPP digital precoating film, preparation method and application |
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| Country | Link |
|---|---|
| CN (1) | CN117777872A (en) |
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2023
- 2023-12-06 CN CN202311663566.8A patent/CN117777872A/en active Pending
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