CN113121903A - High-barrier plastic bottle cap and preparation method thereof - Google Patents
High-barrier plastic bottle cap and preparation method thereof Download PDFInfo
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- CN113121903A CN113121903A CN202110387904.4A CN202110387904A CN113121903A CN 113121903 A CN113121903 A CN 113121903A CN 202110387904 A CN202110387904 A CN 202110387904A CN 113121903 A CN113121903 A CN 113121903A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 107
- 239000004033 plastic Substances 0.000 title claims abstract description 107
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 90
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229920000098 polyolefin Polymers 0.000 claims abstract description 43
- 239000004595 color masterbatch Substances 0.000 claims abstract description 33
- 238000001746 injection moulding Methods 0.000 claims description 29
- 238000001125 extrusion Methods 0.000 claims description 23
- 238000005469 granulation Methods 0.000 claims description 20
- 230000003179 granulation Effects 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 15
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 16
- 239000001301 oxygen Substances 0.000 abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 abstract description 16
- 230000004888 barrier function Effects 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 5
- 229920001903 high density polyethylene Polymers 0.000 description 15
- 239000004700 high-density polyethylene Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- 230000002349 favourable effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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- Dispersion Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention relates to the technical field of plastic bottle caps, in particular to a high-barrier plastic bottle cap and a preparation method thereof, wherein the high-barrier plastic bottle cap contains polyolefin plastic and color master batch, and also contains nano-montmorillonite, the mass content of the polyolefin plastic is 97-99 wt%, the mass content of the color master batch is 0-2 wt%, the mass content of the nano-montmorillonite is 0.5-2 wt%, and a nano-montmorillonite layer is inserted into the polyolefin plastic, so that the permeation path of substances such as oxygen can be increased, and the high barrier property is realized; meanwhile, the mechanical property of the plastic bottle cap can be improved by adding the nano montmorillonite, and the size of the bottle cap cannot be influenced.
Description
Technical Field
The invention relates to the technical field of plastic bottle caps, in particular to a high-barrier plastic bottle cap and a preparation method thereof.
Background
The plastic bottle cap is a sealing tool for sealing bottles with different shapes, functions and materials, and has the characteristic that the original packaging form cannot be recovered after the plastic bottle cap is opened, so that the anti-theft purpose is achieved. Compared with metal bottle caps, the plastic bottle caps have higher flexibility and can better meet the changing demands of the beverage packaging market, the plastic bottle caps replace the metal bottle caps to become the market leaders at present, and the market share ratio is gradually enlarged.
The barrier property is an important consideration index of the plastic bottle cap, and needs to prevent the permeation of oxygen, water, microorganism, organic gas and the like, prevent soil and moisture, maintain the internal environment of the bottle stable, and prolong the shelf life of packaged objects. The existing plastic bottle cap is mainly formed by mixing and injection molding of barrier plastic, color master batches and other additives, common barrier plastic comprises polyvinylidene chloride (PVDC), copolymer (EVOH) of ethylene and vinyl alcohol, polyvinyl alcohol (PVA), nylon (PA) and nitrile resin, and composite materials such as coating packaging films, multilayer co-extrusion films, nano composite materials, inorganic coating packaging materials and the like also have certain barrier property, but with the continuous improvement of the requirements of consumers on products, the barrier property of the existing barrier materials on substances such as oxygen is far from sufficient.
Disclosure of Invention
The invention aims to provide a high-barrier plastic bottle cap which has mechanical property and size deviation meeting actual use requirements and has excellent oxygen barrier property and a preparation method thereof aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-barrier plastic bottle cap comprises polyolefin plastic, color master batches and nano-montmorillonite, wherein the mass content of the polyolefin plastic is 97-99 wt%, the mass content of the color master batches is 0-2 wt%, and the mass content of the nano-montmorillonite is 0.5-2 wt%.
In the technical scheme, the nano montmorillonite is at least one of medical modified nano montmorillonite, oily modified nano montmorillonite and water-based modified nano montmorillonite.
Preferably, the nano montmorillonite is medical modified nano montmorillonite, oily modified nano montmorillonite or water-based modified nano montmorillonite with the mass content of 0.5 wt%, the mass content of the polyolefin plastic is 97.5 wt%, and the mass content of the color master batch is 2 wt%.
Preferably, the nano montmorillonite is medical modified nano montmorillonite, oily modified nano montmorillonite or water-based modified nano montmorillonite with the mass content of 2 wt%, the mass content of the polyolefin plastic is 97 wt%, and the mass content of the color master batch is 1 wt%.
Preferably, the nano montmorillonite is oily modified nano montmorillonite with the mass content of 2 wt%, the mass content of the polyolefin plastic is 97 wt%, and the mass content of the color master batch is 1 wt%.
More preferably, the nano montmorillonite is a mixture of 1 wt% of oily modified nano montmorillonite, 0.5 wt% of medical modified nano montmorillonite and 0.5 wt% of waterborne modified nano montmorillonite, the mass content of the polyolefin plastic is 97 wt%, and the mass content of the color master batch is 1 wt%.
In the above technical scheme, the polyolefin plastic is at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyethylene terephthalate.
The preparation method of the high-barrier plastic bottle cap comprises the steps of uniformly mixing the nano montmorillonite, the polyolefin plastic and the color master batch according to the formula amount, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain the composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the technical scheme, the extrusion temperature of each section of the double-screw extruder is 159-161 ℃, 164-166 ℃, 169-171 ℃, 174-176 ℃ and 174-176 ℃, the feeding speed is 8-12 rpm/min, and the screw rotation speed is 28-32 rpm/min;
the temperature of the first zone of the injection molding machine is 199-201 ℃, the temperature of the second zone is 209-211 ℃, the temperature of the third zone is 219-221 ℃, the temperature of the fourth zone is 219-221 ℃, the glue injection time is 0.2-0.4 s, and the glue injection pressure is 75-85 bar.
In the technical scheme, the extrusion granulation process is repeated for 2-4 times.
The invention has the beneficial effects that:
(1) the high-barrier plastic bottle cap is formed by mixing and injection molding polyolefin plastic and nano montmorillonite, and the nano montmorillonite layer is inserted into the polyolefin plastic, so that the path for oxygen and other substances to penetrate can be increased, and high barrier property is realized; meanwhile, the mechanical property of the plastic bottle cap can be improved by adding the nano montmorillonite, and the size of the bottle cap cannot be influenced.
(2) The high-barrier plastic bottle cap can be completed by using simple extrusion granulation and injection molding processes without complex treatments such as modification and the like, and has the advantages of simple and easily obtained raw materials and low cost.
Drawings
Fig. 1 is a comparative graph showing the sizes of the plastic bottle caps of examples 1 to 3 and comparative example 1.
Fig. 2 is a graph comparing the breaking torque of the plastic bottle caps of examples 1 to 3 and comparative example 1.
Fig. 3 is a comparative graph of the cap opening torque of the plastic bottle caps of examples 1 to 3 and comparative example 1.
Fig. 4 is a graph comparing tensile strengths of the plastic bottle caps of examples 1 to 3 and comparative example 1.
Fig. 5 is a graph comparing oxygen transmission rates of the plastic bottle caps of examples 1 to 3 and comparative example 1.
Fig. 6 is a diagram showing a path of oxygen or the like through the plastic bottle cap of comparative example 1.
Fig. 7 is a path diagram of oxygen and the like through the plastic bottle cap according to embodiments 1 to 4.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The high-barrier plastic bottle cap is formed by mixing and injection molding of polyolefin plastic, nano-montmorillonite and color master batch, wherein the mass content of the polyolefin plastic is 97.5 wt%, the mass content of the color master batch is 2 wt%, the mass content of the nano-montmorillonite is 0.5 wt%, the nano-montmorillonite is one of medical modified nano-montmorillonite, oily modified nano-montmorillonite and water-based modified nano-montmorillonite, and the polyolefin plastic is high-density polyethylene (HDPE).
The preparation method of the high-barrier plastic bottle cap comprises the following steps: uniformly mixing the nano montmorillonite, the high-density polyethylene and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the embodiment, the extrusion temperature of each section of the twin-screw extruder is 160 ℃, 165 ℃, 170 ℃, 174-176 ℃, 175 ℃ and 175 ℃, the feeding speed is 10rpm/min, and the screw rotation speed is 30 rpm/min.
In the technical scheme, the extrusion granulation process is repeated for 3 times, and repeated granulation is favorable for uniformly mixing the nano montmorillonite and the polyolefin plastic.
In the technical scheme, the temperature of the first zone of the injection molding machine is 200 ℃, the temperature of the second zone is 210 ℃, the temperature of the third zone is 220 ℃, the temperature of the fourth zone is 220 ℃, the glue injection time is 0.3s, and the glue injection pressure is 80 bar.
Example 2
The high-barrier plastic bottle cap is formed by mixing and injection molding of polyolefin plastic, nano-montmorillonite and color master batch, wherein the mass content of the polyolefin plastic is 97 wt%, the mass content of the color master batch is 2 wt%, the mass content of the nano-montmorillonite is 1 wt%, the nano-montmorillonite is one of medical modified nano-montmorillonite, oily modified nano-montmorillonite and water-based modified nano-montmorillonite, and the polyolefin plastic is high-density polyethylene (HDPE).
The preparation method of the high-barrier plastic bottle cap comprises the following steps: uniformly mixing the nano montmorillonite, the high-density polyethylene and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the embodiment, the extrusion temperature of each section of the twin-screw extruder is 160 ℃, 165 ℃, 170 ℃, 174-176 ℃, 175 ℃ and 175 ℃, the feeding speed is 10rpm/min, and the screw rotation speed is 30 rpm/min.
In the technical scheme, the extrusion granulation process is repeated for 3 times, and repeated granulation is favorable for uniformly mixing the nano montmorillonite and the polyolefin plastic.
In the technical scheme, the temperature of the first zone of the injection molding machine is 200 ℃, the temperature of the second zone is 210 ℃, the temperature of the third zone is 220 ℃, the temperature of the fourth zone is 220 ℃, the glue injection time is 0.3s, and the glue injection pressure is 80 bar.
Example 3
The high-barrier plastic bottle cap is formed by mixing and injection molding of polyolefin plastic, nano-montmorillonite and color master batch, wherein the mass content of the polyolefin plastic is 97 wt%, the mass content of the color master batch is 1 wt%, the mass content of the nano-montmorillonite is 2 wt%, the nano-montmorillonite is one of medical modified nano-montmorillonite, oily modified nano-montmorillonite and water-based modified nano-montmorillonite, and the polyolefin plastic is high-density polyethylene (HDPE).
The preparation method of the high-barrier plastic bottle cap comprises the following steps: uniformly mixing the nano montmorillonite, the high-density polyethylene and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the embodiment, the extrusion temperature of each section of the twin-screw extruder is 160 ℃, 165 ℃, 170 ℃, 174-176 ℃, 175 ℃ and 175 ℃, the feeding speed is 10rpm/min, and the screw rotation speed is 30 rpm/min.
In the technical scheme, the extrusion granulation process is repeated for 3 times, and repeated granulation is favorable for uniformly mixing the nano montmorillonite and the polyolefin plastic.
In the technical scheme, the temperature of the first zone of the injection molding machine is 200 ℃, the temperature of the second zone is 210 ℃, the temperature of the third zone is 220 ℃, the temperature of the fourth zone is 220 ℃, the glue injection time is 0.3s, and the glue injection pressure is 80 bar.
Example 4
The high-barrier plastic bottle cap is formed by mixing and injection molding of polyolefin plastic, nano-montmorillonite and color master batch, wherein the mass content of the polyolefin plastic is 97 wt%, the mass content of the color master batch is 1 wt%, the mass content of the nano-montmorillonite is 2 wt%, the nano-montmorillonite is a mixture of 1 wt% of oily modified nano-montmorillonite, 0.5 wt% of medical modified nano-montmorillonite and 0.5 wt% of water-based modified nano-montmorillonite, and the polyolefin plastic is high-density polyethylene (HDPE).
The preparation method of the high-barrier plastic bottle cap comprises the following steps: uniformly mixing the nano montmorillonite, the high-density polyethylene and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the embodiment, the extrusion temperature of each section of the twin-screw extruder is 160 ℃, 165 ℃, 170 ℃, 174-176 ℃, 175 ℃ and 175 ℃, the feeding speed is 10rpm/min, and the screw rotation speed is 30 rpm/min.
In the technical scheme, the extrusion granulation process is repeated for 3 times, and repeated granulation is favorable for uniformly mixing the nano montmorillonite and the polyolefin plastic.
In the technical scheme, the temperature of the first zone of the injection molding machine is 200 ℃, the temperature of the second zone is 210 ℃, the temperature of the third zone is 220 ℃, the temperature of the fourth zone is 220 ℃, the glue injection time is 0.3s, and the glue injection pressure is 80 bar.
Comparative example 1
A high-barrier plastic bottle cap is formed by mixing and injection molding of polyolefin plastic and color master batches, wherein the mass content of the color master batches is 2 wt%, the mass content of the polyolefin plastic is 98 wt%, and the polyolefin plastic is high-density polyethylene (HDPE).
The preparation method of the high-barrier plastic bottle cap comprises the following steps: and uniformly mixing the high-density polyethylene and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
In the embodiment, the extrusion temperature of each section of the twin-screw extruder is 160 ℃, 165 ℃, 170 ℃, 174-176 ℃, 175 ℃ and 175 ℃, the feeding speed is 10rpm/min, and the screw rotation speed is 30 rpm/min.
In the technical scheme, the extrusion granulation process is repeated for 3 times, and repeated granulation is favorable for uniformly mixing the nano montmorillonite and the polyolefin plastic.
In the technical scheme, the temperature of the first zone of the injection molding machine is 200 ℃, the temperature of the second zone is 210 ℃, the temperature of the third zone is 220 ℃, the temperature of the fourth zone is 220 ℃, the glue injection time is 0.3s, and the glue injection pressure is 80 bar.
Test method
(1) The tensile properties of the plastic bottle cap materials were measured with a universal material testing machine according to GB/T1040.2-2006 tensile properties of plastics, and samples were prepared with an anisotropic sampler, wherein the width (b) of a rectangular sample was (15. + -. 0.5) mm, the length (L) was (150. + -. 0.5) mm, and the tensile speed was 50mm/min, and 6 sets of parallel experiments were performed.
(2) The oxygen permeability of the plastic bottle cap is determined by a BSG-11A oxygen permeameter of Guangzhou West Tang science and technology Limited company in Guangzhou according to the GB/T1038-2000 pressure difference method for testing the gas permeability of plastic films and thin sheets. Vacuumizing for 3h, ventilating for 30min, and testing for 3 h.
(3) Measured using a torque meter (vortoxi-i Mecmesin, uk). After the 3025 bottle openings were formed, 5 specimens were added to each bottle cap at a torque of 1.8N · m using a single capping machine (available from gifkoku corporation), and the bottle cap breaking torque and the cap opening torque were measured.
(4) And (3) carrying out size deviation test on the obtained plastic bottle cap according to GB/T17876-.
Results and analysis
The results of the performance tests of examples 1 to 3 and comparative example 1 are shown in FIGS. 1 to 5, and the results of the performance test of example 4 are shown in Table 1.
TABLE 1
| Bottle cap outer diameter/mm | Inner diameter dimension/mm of bottle cap | Tensile strength/MPa | |
| Example 4 | 31 | 29 | 53 |
| Bridge-cut-off torque/N.m | Moment of opening cover/N.m | Oxygen permeability (cc/m)2·d·Pa) | |
| Example 4 | 1.2 | 1.1 | 420 |
Referring to fig. 1-5, it can be seen that:
(1) the addition of the nano montmorillonite does not influence the size of the plastic bottle cap, and the bridge-cut torque and the uncapping torque are both in a qualified range;
(2) when the addition amount of the oily modified montmorillonite is more than 0.5 wt%, the tensile strength of the plastic bottle cap can be improved;
(3) the oxygen transmission rate of the plastic bottle cap can be obviously reduced by adding the nano montmorillonite, and when the addition amount is 0.5 wt% and 2 wt%, the oxygen transmission rate is greatly reduced, wherein the medical modified montmorillonite is the most prominent. As can be shown by combining fig. 6-7, the addition of the nano montmorillonite enables the nano montmorillonite layer to be inserted into the polyolefin plastic, so that the path length for oxygen and other substances to penetrate is increased, the oxygen and other substances are difficult to penetrate, and high barrier property is realized.
Referring to table 1, the dimensions, tensile strength, torque and oxygen permeability of the plastic bottle cap are all at high levels, which shows that the nano-montmorillonite of example 4 is a mixture of 1 wt% of oily modified nano-montmorillonite, 0.5 wt% of medical modified nano-montmorillonite and 0.5 wt% of water modified nano-montmorillonite, so that the three can exert their respective advantages, thereby obtaining the best results.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A high-barrier plastic bottle cap contains polyolefin plastic and color master batches, and is characterized in that: the polyolefin plastic color masterbatch is characterized by further comprising nano montmorillonite, wherein the polyolefin plastic mass content is 97-99 wt%, the color masterbatch mass content is 0-2 wt%, and the nano montmorillonite mass content is 0.5-2 wt%.
2. The high-barrier plastic bottle cap as claimed in claim 1, wherein: the nano montmorillonite is at least one of medical modified nano montmorillonite, oily modified nano montmorillonite and water-based modified nano montmorillonite.
3. The high-barrier plastic bottle cap as claimed in claim 2, wherein: the nano montmorillonite is medical modified nano montmorillonite, oily modified nano montmorillonite or water-based modified nano montmorillonite with the mass content of 0.5 wt%, the mass content of the polyolefin plastic is 97.5 wt%, and the mass content of the color master batch is 2 wt%.
4. The high-barrier plastic bottle cap as claimed in claim 2, wherein: the nano montmorillonite is medical modified nano montmorillonite, oily modified nano montmorillonite or water-based modified nano montmorillonite with the mass content of 2 wt%, the mass content of the polyolefin plastic is 97 wt%, and the mass content of the color master batch is 1 wt%.
5. The high-barrier plastic bottle cap as claimed in claim 4, wherein: the nano montmorillonite is oily modified nano montmorillonite with the mass content of 2 wt%, the polyolefin plastic is 97 wt%, and the color master batch is 1 wt%.
6. The high-barrier plastic bottle cap as claimed in claim 2, wherein: the nano montmorillonite is a mixture of 1 wt% of oily modified nano montmorillonite, 0.5 wt% of medical modified nano montmorillonite and 0.5 wt% of water-based modified nano montmorillonite, the mass content of the polyolefin plastic is 97 wt%, and the mass content of the color master batch is 1 wt%.
7. The high-barrier plastic bottle cap as claimed in claim 1, wherein: the polyolefin plastic is at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyethylene terephthalate.
8. The method for preparing a high-barrier plastic bottle cap as claimed in any one of claims 1 to 7, wherein the method comprises the following steps: uniformly mixing the nano montmorillonite, the polyolefin plastic and the color master batch according to the formula ratio, feeding the mixture into a double-screw extruder, carrying out melt extrusion granulation to obtain composite master batch, and feeding the composite master batch into an injection molding machine for injection molding to obtain the high-barrier plastic bottle cap.
9. The method for preparing the high-barrier plastic bottle cap according to claim 8, wherein the method comprises the following steps: the extrusion temperature of each section of the double-screw extruder is 159-161 ℃, 164-166 ℃, 169-171 ℃, 174-176 ℃ and 174-176 ℃, the feeding speed is 8-12 rpm/min, and the screw rotating speed is 28-32 rpm/min;
the temperature of the first zone of the injection molding machine is 199-201 ℃, the temperature of the second zone is 209-211 ℃, the temperature of the third zone is 219-221 ℃, the temperature of the fourth zone is 219-221 ℃, the glue injection time is 0.2-0.4 s, and the glue injection pressure is 75-85 bar.
10. The method for preparing the high-barrier plastic bottle cap according to claim 8, wherein the method comprises the following steps: and repeating the extrusion granulation process for 2-4 times.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651297A (en) * | 2022-10-25 | 2023-01-31 | 中国地质科学院水文地质环境地质研究所 | High-airtightness isotope sampling bottle and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511871A (en) * | 2002-12-27 | 2004-07-14 | 中国石化北京燕化石油化工股份有限公 | Polyvinyl/montmorillonite composite separate material |
| CN1523053A (en) * | 2003-09-03 | 2004-08-25 | �Ϻ���ͨ��ѧ | Polyvinyl montmorillonite nanometer composite material and method for preparing the same |
| CN108727661A (en) * | 2017-04-20 | 2018-11-02 | 中国石化扬子石油化工有限公司 | A kind of preparation method of bottle cap polyethylene composition |
-
2021
- 2021-04-12 CN CN202110387904.4A patent/CN113121903A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511871A (en) * | 2002-12-27 | 2004-07-14 | 中国石化北京燕化石油化工股份有限公 | Polyvinyl/montmorillonite composite separate material |
| CN1523053A (en) * | 2003-09-03 | 2004-08-25 | �Ϻ���ͨ��ѧ | Polyvinyl montmorillonite nanometer composite material and method for preparing the same |
| CN108727661A (en) * | 2017-04-20 | 2018-11-02 | 中国石化扬子石油化工有限公司 | A kind of preparation method of bottle cap polyethylene composition |
Non-Patent Citations (1)
| Title |
|---|
| 李彭 等: "《塑料包装容器设计》", 31 January 2015, 印刷工艺出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651297A (en) * | 2022-10-25 | 2023-01-31 | 中国地质科学院水文地质环境地质研究所 | High-airtightness isotope sampling bottle and preparation method and application thereof |
| CN115651297B (en) * | 2022-10-25 | 2024-03-19 | 中国地质科学院水文地质环境地质研究所 | High-tightness isotope sampling bottle and preparation method and application thereof |
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Application publication date: 20210716 |