CN115891353A - Straight-line easy-to-tear transparent synthetic paper and preparation method and application thereof - Google Patents
Straight-line easy-to-tear transparent synthetic paper and preparation method and application thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 30
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 76
- 239000010410 layer Substances 0.000 claims abstract description 41
- 239000012792 core layer Substances 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 25
- 239000003208 petroleum Substances 0.000 claims abstract description 12
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
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- 229920000092 linear low density polyethylene Polymers 0.000 claims description 19
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 17
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- 238000002844 melting Methods 0.000 claims description 9
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- 239000000155 melt Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 7
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- 239000004702 low-density polyethylene Substances 0.000 claims description 6
- 238000003851 corona treatment Methods 0.000 claims description 5
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 2
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- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
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- 239000000377 silicon dioxide Substances 0.000 description 3
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
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- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
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- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention belongs to the technical field of synthetic paper, and discloses transparent synthetic paper easy to tear linearly, and a preparation method and application thereof. The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, wherein the heat sealing layer, the core layer and the corona layer respectively comprise an easy-tearing master batch, and the easy-tearing master batch comprises dicyclopentadiene petroleum resin or carbon nonahydrogenation petroleum resin. According to the invention, by adding the easy-tearing master batch into each layer of the synthetic paper, the synthetic paper not only has easy-tearing performance (the tearing resistance is less than 2500 mN), but also has high transparency (the haze is less than 14%), high stiffness, easy tearing of the imitation paper and Zhang Tingxing effect.
Description
Technical Field
The invention belongs to the technical field of synthetic paper, and particularly relates to transparent synthetic paper easy to tear linearly, and a preparation method and application thereof.
Background
Paper made of plant fiber is greatly convenient for people to write, print and transmit information, is a traditional packaging material and is widely applied to daily life, however, the paper is generally not waterproof and opaque and has defects in use and decoration effects, so that various paper-like products are developed for people, the application field is greatly expanded, and the paper is mainly made of plastics. The general synthetic paper production method is characterized by that in the polypropylene resin the filler and titanium dioxide are added, and through the processes of melting plasticization and biaxial tension a BOPP film with good planeness and excellent printing property is formed, and its water-proofing property and weather-resisting property are greatly raised, so that it can be extensively used for newspapers, magazines and books, etc. However, the BOPP film has a problem that it is difficult to tear or the tear is jagged, and the BOPP film is opaque. In addition, the common polyolefin cast film has the advantages of good transparency, heat sealing, small contraction and the like, but the tearing resistance is too high, so that the tearing is difficult in the packaging use process, the tearing force is too large when the film needs to be torn, and the connection or the sawtooth-shaped edge appears, so that the packaged contents are thrown and lost, and the use efficiency is greatly influenced. Therefore, the requirement of achieving the performance effect of easy linear tearing of the traditional paper and improving the unidirectional linear easy tearing performance of the film is an urgent requirement of the synthetic paper film industry. At present, the basic method is to realize the linear tearing function by directionally arranging molecular chains through a one-way or two-way stretching film, and in fact, the film after two-way stretching has a certain inclination angle when being torn, although the film can be torn linearly through one-way stretching, the heat sealing property of the film is reduced, and the defects of easy shrinkage and the like are also followed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art described above. Therefore, the invention provides the straight-line easy-to-tear transparent synthetic paper and the preparation method and application thereof.
The first aspect of the invention provides synthetic paper which comprises a heat sealing layer, a core layer and a corona layer from top to bottom, wherein the heat sealing layer, the core layer and the corona layer respectively comprise an easily-torn master batch, and the easily-torn master batch comprises dicyclopentadiene petroleum resin or carbon nonahydrogenation petroleum resin. The mechanical property of the synthetic paper can be obviously improved and the tearing resistance of the synthetic paper can be reduced through the easy-tearing master batch on each layer, so that a better easy-tearing effect is achieved, and meanwhile, the transparency is not influenced.
Preferably, the mass ratio of the easy-tearing master batch in the heat-sealing layer, the core layer and the corona layer is 10-30%. By limiting the using amount of the easy-tearing master batch, a more ideal easy-tearing effect can be achieved; if the mass ratio of the easy-to-tear master batch is less than 10%, the tearing performance is poor; if the mass percentage of the easy-tearing master batch is higher than 30%, for example, 35%, the easy-tearing master batch is easy to melt or break at a die head of an extruder to form a normal film, and when the mass percentage of the easy-tearing master batch is higher than 40%, the easy-tearing master batch cannot form the film completely.
Preferably, the synthetic paper has a thickness of 60 to 150 μm.
Preferably, the heat-sealing layer further comprises at least one of copolymerized PP (polypropylene), LLDPE (linear low density polyethylene), LDPE (low density polyethylene), anti-blocking masterbatch and slip masterbatch.
Preferably, the heat-sealing layer further comprises LLDPE, an anti-blocking master batch and a slip master batch. The melting point of the copolymerized PP, LLDPE or LDPE is lower, so that the synthetic paper has low-temperature heat sealing performance; the anti-adhesion master batch can prevent the adhesion of the synthetic paper, so that the winding and unwinding are smooth and the opening is easy; the smooth master batch can reduce the friction coefficient of the surface of the synthetic paper, improve the smooth opening performance and improve the service performance of the synthetic paper.
Preferably, the LLDPE comprises 66-86% by mass of the heat-seal layer.
Preferably, the mass proportion of the anti-blocking master batch in the heat sealing layer is 1-5%.
Preferably, the mass proportion of the smooth master batch in the heat sealing layer is 1-5%.
Preferably, the thickness of the heat-seal layer is 10-30 μm.
Preferably, the core layer further comprises at least one of homopolymeric PP, MLLDPE (metallocene linear low density polyethylene), antistatic masterbatch.
Preferably, the core layer further comprises homopolypropylene or MLLDPE, and an antistatic masterbatch. Homopolymerized PP or MLLDPE is used as a main material of the core layer, so that the synthetic paper has good physical and mechanical properties, optical properties and the like, the homopolymerized PP or MLLDPE has high hardness and stiffness, and the stiffness is further improved by matching with modification of an easily-torn master batch, so that the synthetic paper has the effects of easy tearing of the imitation paper and Zhang Tingxing; the antistatic master batch can reduce the surface resistivity of the synthetic paper, prevent dust and improve the unwinding performance and the service performance of the synthetic paper.
Preferably, the mass proportion of the homopolymerized PP or MLLDPE in the core layer is 66-87%.
Preferably, the mass proportion of the antistatic master batch in the core layer is 1-5%.
Preferably, the thickness of the core layer is 30-100 μm.
Preferably, the corona layer further comprises at least one of co-polypropylene, LLDPE, LDPE and anti-blocking master batch.
Preferably, the corona layer further comprises co-polypropylene (PP) and an anti-blocking master batch.
Preferably, the mass proportion of the copolymerized PP in the corona layer is 66-87%.
Preferably, the mass proportion of the anti-blocking master batch in the corona layer is 1-5%.
Preferably, the corona layer has a thickness of 5-20 μm.
Preferably, the easy-tearing master batch is selected from the easy-tearing master batch A or the easy-tearing master batch B.
Preferably, the tearable masterbatch A is prepared by the following preparation method:
adding LLDPE carrier resin and carbon-nine hydrogenated petroleum resin into a high-speed mixer, stirring and mixing, performing melt plasticization and dispersive mixing through a double-screw extruder, cooling, bracing and granulating to obtain the easily-torn master batch A.
Preferably, the tearable masterbatch B is prepared by the following preparation method:
adding LLDPE carrier resin and dicyclopentadiene petroleum resin into a high-speed mixer, stirring and mixing, performing melt plasticization and dispersion mixing through a double-screw extruder, cooling, bracing and granulating to obtain the master batch B easy to tear.
Preferably, the anti-adhesion master batch is prepared by adopting the following preparation method:
adding LLDPE carrier resin and synthetic silicon dioxide anti-blocking agent into a high-speed mixer, stirring and mixing, then carrying out melt plasticization and dispersion mixing by a double-screw extruder, and then cooling, bracing and granulating to obtain the anti-blocking master batch.
Preferably, the smooth master batch is prepared by the following preparation method:
adding LLDPE carrier resin and amide slipping agent into a high-speed mixer, stirring and mixing, then carrying out melt plasticization and dispersion mixing by a double-screw extruder, and then cooling, bracing and granulating to obtain the slipping master batch.
Preferably, the antistatic master batch is prepared by the following preparation method:
adding LLDPE carrier resin and amine or lipid antistatic agent into a high-speed mixer, stirring and mixing, then carrying out melt plastification through a double-screw extruder, dispersing and mixing, and then cooling, bracing and granulating to obtain the antistatic master batch.
Preferably, the stirring speed of the high-speed mixer is 100-300r/min, and the stirring time is 1-3min; the diameter of a screw of the double-screw extruder is 30-80mm, the length-diameter ratio is 35-50, the temperature of the extruder is 180-230 ℃, the die head temperature of the extruder is 200 ℃, the feeding speed is 10-60r/min, the rotating speed of the screw is 100-300r/min, the length of the supercooled water is not more than 0.5m, and the rotating speed of the granulator is 100-300r/min.
The second aspect of the present invention provides a method for preparing the synthetic paper of the present invention, comprising the steps of:
melting the raw materials of the heat-sealing layer, the core layer and the corona layer respectively through different screw extruders, and then extruding a melt through a die orifice of a multi-runner co-extrusion machine head;
and cooling the melt at 10-20 ℃ to form a film, and performing corona treatment to obtain the synthetic paper. It can be understood that the cooling casting device used for cooling may be composed of a casting roller and a cooling water tank, or only a cooling casting roller, and mainly cools and shapes the melt coming out of the die head into a film, and the setting of the cooling temperature has a great influence on the transparency and the heat shrinkage rate of the film.
Preferably, the temperature of the screw extruder and die is 200-260 ℃. The screw extruder can be a single screw extruder or a twin screw extruder, and the temperature setting range of the extruder is 200-260 ℃, because: the temperature is too low, the resin has poor plasticization, so that the appearance effect of the film is poor, and even the melt is difficult to extrude; too high a temperature, the resin is liable to decompose, which affects the product properties and even the stability of the production.
Preferably, the power of the corona treatment is 1-1.5kvA. The corona treatment enables the surface of the film to be oxidized with polar groups, simultaneously achieves a slight coarsening effect, and improves the surface tension of the polyolefin to be more than 38 dynes, so as to be beneficial to the subsequent procedures of gluing, printing, gold stamping and the like.
In a third aspect, the invention provides the use of the synthetic paper of the invention in packaging materials.
Based on the application, the invention also provides a packaging bag which is made of the synthetic paper.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, by adding the easy-tearing master batch into each layer of the synthetic paper, the synthetic paper not only has easy-tearing performance (the tearing resistance is less than 2500 mN), but also has high transparency (the haze is less than 14%), high stiffness, easy tearing of the imitation paper and Zhang Tingxing effect.
The preparation method of the synthetic paper adopts a three-layer co-extrusion casting process for one-step molding, does not need to perform unidirectional or bidirectional stretching of a film, is simple and easy to implement, has low cost, and is suitable for large-scale industrial production.
Drawings
FIG. 1 is a graph showing the effect of the synthetic paper of example 1 and the synthetic paper of comparative example 1 after being torn.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.
The raw materials, reagents, and apparatuses used in the following examples are all conventionally commercially available, unless otherwise specified, or may be obtained by conventionally known methods.
In the following examples, comparative examples:
LLDPE adopts cyclopentadiene petrochemical linear polyethylene DFDA-7042;
homopolymerized PP adopts Mognoni petrochemical polypropylene resin F300M;
MLLDPE adopts Dow chemical medium density polyethylene 2036P;
the ternary polymerization PP adopts Singapore TPC FS5612;
the carbon nonahydrogenation petroleum resin adopts R1140 of Iseman chemical company;
the dicyclopentadiene petroleum resin adopts OP501 of Japan petrochemical industry;
the lipid antistatic agent adopts glyceryl monostearate TEGIN PELLET of Wingchuang solid race;
the synthetic silicon dioxide anti-blocking agent adopts AB750 of American PQ company, and the average grain diameter is 5 mu m;
the amide slipping agent adopts erucamide E of Acksonobel chemical company, and the melting point is 85 ℃.
The easy-tearing master batch A is prepared by the following preparation method:
adding 50 mass percent of LLDPE carrier resin and 50 mass percent of carbon nonahydrogenation petroleum resin into a high-speed mixer, stirring and mixing, melting and plasticizing through a double-screw extruder, dispersing and mixing, cooling, pulling into strips and cutting into granules to obtain the easy-to-tear master batch A.
The easy-tearing master batch B is prepared by the following preparation method:
adding 50 percent by mass of LLDPE carrier resin and 50 percent by mass of dicyclopentadiene petroleum resin into a high-speed mixer, stirring and mixing, melting and plasticizing through a double-screw extruder, dispersing and mixing, cooling, stretching, cutting into granules, and obtaining the master batch B easy to tear.
The anti-adhesion master batch is prepared by the following preparation method:
adding the LLDPE carrier resin accounting for 95 percent of the mass percent and the synthetic silicon dioxide anti-adhesion agent accounting for 5 percent of the mass percent into a high-speed mixer, stirring and mixing, melting and plasticizing through a double-screw extruder, dispersing and mixing, cooling, pulling into strips and cutting into granules to obtain the anti-adhesion master batch.
The smooth master batch is prepared by the following preparation method:
adding 90 percent by mass of LLDPE carrier resin and 10 percent by mass of amide slipping agent into a high-speed mixer, stirring and mixing, then carrying out melt plastification through a double-screw extruder, dispersing and mixing, and then cooling, bracing and granulating to obtain the slipping master batch.
The antistatic master batch is prepared by the following preparation method:
adding LLDPE carrier resin and lipid antistatic agent into a high-speed mixer, stirring and mixing, then carrying out melt plastification and dispersion mixing by a double-screw extruder, and then cooling, bracing and granulating to obtain the antistatic master batch.
The device parameters adopted in the preparation process of the master batch are as follows: the stirring speed of the high-speed mixer is 200r/min, and the stirring time is 3min; the diameter of a screw of the double-screw extruder is 50mm, the length-diameter ratio is 40, the temperature of the extruder is 200 ℃, the die head temperature of the extruder is 200 ℃, the feeding speed is 40r/min, the rotating speed of the screw is 200r/min, the length of supercooled water is 0.3m, and the rotating speed of a granulator is 200r/min.
Example 1
The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, and raw materials and contents of the layers are shown in table 1.
TABLE 1
The preparation method of the synthetic paper comprises the following steps:
melting the raw materials of the heat-sealing layer, the core layer and the corona layer respectively through different screw extruders, and then extruding a melt through a die orifice of a multi-runner co-extrusion machine head (T-shaped die head); the temperature of the screw extruder and the die orifice is 200 ℃;
cooling the melt by a casting roller to form a film, and then performing corona, traction and rolling to obtain synthetic paper; the temperature of the casting rolls was 20 ℃ and the corona output was 1.5kVA.
Example 2
The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, and raw materials and contents of the layers are shown in table 2.
TABLE 2
This example prepares synthetic paper in the same manner as example 1.
Example 3
The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, and raw materials and contents of the layers are shown in table 3.
TABLE 3
The synthetic paper of this example was prepared in the same manner as in example 1.
Example 4
The difference from the example 1 is that in the example 4, the easy-tearing master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-tearing master batch B, and other raw materials, the using amount and the preparation method are the same as those in the example 1.
Example 5
The difference from the example 2 is that in the example 5, the easy-tearing master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-tearing master batch B, and other raw materials, the using amount and the preparation method are the same as those in the example 2.
Example 6
The difference from the example 3 is that in the example 6, the easy-tearing master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-tearing master batch B, and other raw materials, the using amount and the preparation method are the same as those in the example 3.
Example 7
The difference from example 1 is that example 7 replaces the homopolymeric PP of the core layer with MLLDPE and the other raw materials, amounts and preparation methods are the same as example 1.
Example 8
The difference from example 2 is that example 8 replaces the homopolyPP in the core layer with MLLDPE, and the other raw materials, amounts and preparation method are the same as example 2.
Example 9
The difference from example 3 is that example 9 replaces the homopolymeric PP of the core layer with MLLDPE and the other raw materials, amounts and preparation methods are the same as example 3.
Example 10
The difference from the example 1 is that in the example 10, the easy-tearing master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-tearing master batch B, the homopolymerized PP of the core layer is replaced by MLLDPE, and other raw materials, the using amount and the preparation method are the same as those in the example 1.
Example 11
The difference from the example 2 is that in the example 11, the easy-tearing master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-tearing master batch B, the homopolymerized PP of the core layer is replaced by MLLDPE, and other raw materials, the using amount and the preparation method are the same as those in the example 2.
Example 12
The difference from the example 3 is that in the example 12, the easy-to-tear master batch A in the heat sealing layer, the core layer and the corona layer is replaced by the easy-to-tear master batch B, the homopolymerized PP of the core layer is replaced by the MLLDPE, and other raw materials, dosage and preparation method are the same as those in the example 3.
Comparative example 1
The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, and raw materials and contents of the layers are shown in table 4.
TABLE 4
This comparative example synthetic paper was prepared in the same manner as in example 1.
Comparative example 2
The synthetic paper comprises a heat sealing layer, a core layer and a corona layer from top to bottom, and raw materials and contents of the layers are shown in a table 5.
TABLE 5
The synthetic paper of this comparative example was prepared in the same manner as in example 1.
Comparative example 3
The difference from example 1 is that in the preparation method of the synthetic paper of comparative example 3, the temperature of the casting roll is 30 ℃, and other preparation conditions, raw materials and use amounts are the same as example 1.
The synthetic papers prepared in examples 1 to 12 and comparative examples 1 to 3 were subjected to the performance test, and the results are shown in table 6.
TABLE 6
As can be seen from table 6, comparative example 1, to which the easy-tear masterbatch of the present invention was not added, resulted in a tear resistance significantly greater than that of examples 1 and 4; comparative example 2 without the addition of the easy-to-tear masterbatch of the present invention, the tear resistance was significantly greater than that of examples 7 and 10, and the elastic modulus of comparative example 1 and comparative example 2 was reduced (low stiffness), and the tear resistance was not easy to meet the requirements; in examples 1 to 12, after the easy-to-tear master batch is modified, the tear resistance of the synthetic paper is greatly reduced, the tear resistance of the general plastic film in the longitudinal and transverse directions is more than 3000mN, people feel hard when tearing by bare hands, the crack is not linear, a sawtooth edge is easy to generate, the conventional paper is less than 2500mN and can be relatively easily torn, the tear resistance of the synthetic paper provided by the invention is less than 2500mN, the elastic modulus is increased (the stiffness is improved), the transparency is improved, the thermal shrinkage rate is low, the size is stable, the heat sealing strength is more than 5N, the synthetic paper can be subjected to deep processing such as heat sealing, embossing and printing, and the synthetic paper has the effects of easy-to-tear and Zhang Tingxing. The temperature of the casting roll in the preparation process of comparative example 3 was high, resulting in a significant increase in haze and a decrease in transparency.
When the synthetic paper of example 1 is compared with the synthetic paper of comparative example 1 in terms of tearing, as shown in fig. 1, it is apparent that the synthetic paper of example 1 is torn by bare hands, and the tear is straight and has no jagged edge; the synthetic paper of comparative example 1 was torn by hand, but the tear was not straight and had a distinct jagged edge.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. The synthetic paper is characterized by comprising a heat sealing layer, a core layer and a corona layer from top to bottom, wherein the heat sealing layer, the core layer and the corona layer respectively comprise an easily-torn master batch, and the easily-torn master batch comprises dicyclopentadiene petroleum resin or carbon nonahydrogenation petroleum resin.
2. The synthetic paper according to claim 1, wherein the easy-tear masterbatch comprises 10-30% of the heat-seal layer, the core layer and the corona layer.
3. The synthetic paper of claim 1, wherein the heat seal layer further comprises at least one of co-polypropylene, LLDPE, LDPE, anti-blocking masterbatch, and slip masterbatch.
4. The synthetic paper of claim 1, wherein the core layer further comprises at least one of homopolymeric PP, MLLDPE, antistatic masterbatch.
5. The synthetic paper of claim 1, wherein the corona layer further comprises at least one of co-polypropylene, LLDPE, LDPE, and anti-blocking masterbatch.
6. The method of making synthetic paper according to any of claims 1 to 5, comprising the steps of:
melting the raw materials of the heat-sealing layer, the core layer and the corona layer respectively through different screw extruders, and then extruding a melt through a die orifice of a multi-runner co-extruder head;
and cooling the melt at 10-20 ℃ to form a film, and performing corona treatment to obtain the synthetic paper.
7. The method of making synthetic paper according to claim 6, wherein the temperature of the screw extruder and the die is 200-260 ℃.
8. The method of making synthetic paper according to claim 6, wherein the corona treatment has a power of 1-1.5kvA.
9. Use of the synthetic paper according to any one of claims 1 to 5 in packaging materials.
10. A packaging bag, characterized by being made of the synthetic paper according to any one of claims 1 to 5.
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| CN109263200A (en) * | 2018-09-30 | 2019-01-25 | 黄山永新股份有限公司 | A kind of two-way linear easily tears polyethylene film and its production technology |
| CN109734989A (en) * | 2018-12-27 | 2019-05-10 | 佛山佛塑科技集团股份有限公司 | A kind of film and its preparation method and application |
| CN110121536A (en) * | 2016-11-14 | 2019-08-13 | 安帕塞特公司 | Synthesis paper wood and its manufacturing method with improved tear characteristics |
| CN112724507A (en) * | 2020-12-10 | 2021-04-30 | 金发科技股份有限公司 | Cast polypropylene composition and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110121536A (en) * | 2016-11-14 | 2019-08-13 | 安帕塞特公司 | Synthesis paper wood and its manufacturing method with improved tear characteristics |
| CN109263200A (en) * | 2018-09-30 | 2019-01-25 | 黄山永新股份有限公司 | A kind of two-way linear easily tears polyethylene film and its production technology |
| CN109734989A (en) * | 2018-12-27 | 2019-05-10 | 佛山佛塑科技集团股份有限公司 | A kind of film and its preparation method and application |
| CN112724507A (en) * | 2020-12-10 | 2021-04-30 | 金发科技股份有限公司 | Cast polypropylene composition and preparation method and application thereof |
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