CN117698248B - Toughened puncture-resistant vacuum compression bag and preparation method thereof - Google Patents
Toughened puncture-resistant vacuum compression bag and preparation method thereof Download PDFInfo
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- CN117698248B CN117698248B CN202311790996.6A CN202311790996A CN117698248B CN 117698248 B CN117698248 B CN 117698248B CN 202311790996 A CN202311790996 A CN 202311790996A CN 117698248 B CN117698248 B CN 117698248B
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- 238000007906 compression Methods 0.000 title claims abstract description 59
- 230000006835 compression Effects 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- -1 polyethylene Polymers 0.000 claims abstract description 49
- MIJPAVRNWPDMOR-UHFFFAOYSA-N [2-(1,2-dihydroxyethyl)-3-hydroxy-5-oxo-2h-furan-4-yl] dihydrogen phosphate Chemical compound OCC(O)C1OC(=O)C(OP(O)(O)=O)=C1O MIJPAVRNWPDMOR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000004698 Polyethylene Substances 0.000 claims abstract description 43
- 229920000573 polyethylene Polymers 0.000 claims abstract description 43
- 239000000203 mixture Substances 0.000 claims description 23
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 claims description 20
- 229920001684 low density polyethylene Polymers 0.000 claims description 20
- 239000004702 low-density polyethylene Substances 0.000 claims description 20
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 17
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 11
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
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- 238000007731 hot pressing Methods 0.000 claims description 6
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- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000005022 packaging material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 36
- 239000004954 Polyphthalamide Substances 0.000 description 18
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- 238000011056 performance test Methods 0.000 description 8
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- 239000012968 metallocene catalyst Substances 0.000 description 2
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- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
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- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
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- 230000007123 defense Effects 0.000 description 1
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
- B65D81/2023—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Bag Frames (AREA)
Abstract
The application relates to the technical field of packaging materials, in particular to a toughened puncture-resistant vacuum compression bag and a preparation method thereof. A toughened puncture-resistant vacuum compression bag comprises an outer layer, a middle layer and an inner layer; the outer layer comprises the following components in parts by weight: 130-145 parts of polyethylene A and 0.07-0.12 part of PPA; the middle layer comprises the following components in parts by weight: 180-195 parts of polyethylene B and 0.07-0.12 part of PPA; the inner layer comprises the following components in parts by weight: 155-170 parts of polyethylene C, 0.07-0.12 part of PPA and 0.3-0.5 part of vitamin C phosphate. The vitamin C phosphate is added into the inner layer component contacted with food, so that the toughness and puncture resistance of the toughened puncture-resistant vacuum compression bag can be effectively ensured, and the haze of the toughened puncture-resistant vacuum compression bag can be reduced.
Description
Technical Field
The application relates to the technical field of packaging materials, in particular to a toughened puncture-resistant vacuum compression bag and a preparation method thereof.
Background
The vacuum compression bag is a kind of packaging bag in which air in the packaging bag is drawn out and sealed, and the inside of the bag is maintained in a highly decompressed state. The air in the vacuum compression bag is rare and is equivalent to a low-oxygen environment, so that microorganisms are difficult to survive, and the aim of food fresh-keeping is fulfilled. With the gradual improvement of the living standard of people and the continuous improvement of the living quality requirements of people, the vacuum compression bag has taken up the important position in the life of contemporary people.
However, in the actual use process, when the vacuum compression bag is used for packaging some articles with edges and corners such as steaks, the vacuum compression bag is easy to be pricked by sharp corners of the steaks, so that the steaks are polluted by external bacteria, and the use effect of the vacuum compression bag is reduced.
Disclosure of Invention
In order to solve the problem that the existing vacuum compression bag is easy to be punctured by the article with the edge angle, the application provides the toughening puncture-resistant vacuum compression bag and the preparation method thereof.
In a first aspect, the application provides a toughened puncture-resistant vacuum compression bag, which adopts the following technical scheme:
a toughened puncture-resistant vacuum compression bag comprises an outer layer, a middle layer and an inner layer;
The outer layer comprises the following components in parts by weight: 130-145 parts of polyethylene A and 0.07-0.12 part of PPA;
the middle layer comprises the following components in parts by weight: 180-195 parts of polyethylene B and 0.07-0.12 part of PPA;
the inner layer comprises the following components in parts by weight: 155-170 parts of polyethylene C, 0.07-0.12 part of PPA and 0.3-0.5 part of vitamin C phosphate.
By adopting the technical scheme, the inner layer structure needs to be in direct contact with food, so that the toughness of the inner layer needs to be ensured, and the vitamin C phosphate has sorbitol groups and phosphate groups, wherein the sorbitol groups are dissolved in the polyethylene C, so that the vitamin C phosphate forms a homogeneous solution, and when the polyethylene C is cooled, the vitamin C phosphate is crystallized to form a fibrous network, the network is uniformly dispersed, and the surface of the network becomes a crystallization nucleation center;
After the vitamin C phosphate becomes a crystallization nucleation center, the phosphate group in the vitamin C phosphate can adsorb polyethylene C, and promote the nucleation and growth process of microscopic particles through chemical reaction and material action; the vitamin C phosphate is added into the inner layer component, so that the toughness and puncture resistance of the toughened puncture-resistant vacuum compression bag can be effectively improved;
In addition, as the vitamin C phosphate becomes heterogeneous nucleation point in the polyethylene C, the crystallization temperature of the whole inner layer system is increased, the rate is increased, the number of spherulites is increased, and the size is reduced, so that the haze of the inner layer is reduced.
Preferably, the polyethylene A of the outer layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 70-80 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
By adopting the technical scheme, the outer layer of the vacuum compression bag is used for printing, and good printing performance and toughness are required; the linear low-density polyethylene has a relatively uniform molecular structure and a linear chain structure, and has relatively high strength, hardness and toughness; the metallocene polyethylene is polyethylene polymerized by a metallocene catalyst, the molecular structure of the metallocene polyethylene is more uniform than that of linear low-density polyethylene, and the mass distribution of molecular chains is narrower, so that the metallocene polyethylene has better strength, hardness and toughness; the low-density polyethylene, the linear low-density polyethylene and the metallocene polyethylene are mutually matched, so that the vacuum compression bag has better puncture resistance.
Preferably, the polyethylene B of the middle layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 120-130 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
By adopting the technical scheme, the middle layer of the vacuum compression bag belongs to the barrier layer, and the objects in the bag are protected from the outside; the metallocene polyethylene has better strength, hardness and toughness, so that the low-density polyethylene, the linear low-density polyethylene and the metallocene polyethylene are mixed together, and the puncture resistance requirement of the middle layer of the vacuum compression bag can be effectively met.
Preferably, the middle layer further comprises vitamin C phosphate.
By adopting the technical scheme, on one hand, the vitamin C phosphate can increase the puncture resistance of the middle layer, so that the middle layer serves as a defense line of the inner layer, the middle layer of the toughening puncture-resistant vacuum compression bag is reduced when food in the packaging bag is punctured, and leakage of the toughening puncture-resistant vacuum compression bag caused by puncturing the middle layer by foreign sharp objects during storage is reduced, so that food pollution in the vacuum compression bag is caused.
Preferably, the mass ratio of the low-density polyethylene of the middle layer to the vitamin C phosphate is 25:0.5-0.8.
By adopting the technical scheme, when the content of the vitamin C phosphate is too low, various polyethylenes in the middle layer are difficult to soften further, so that the toughness and puncture resistance of the vacuum compression bag are difficult to improve further; when the content of the vitamin C phosphate is too high, the toughness of various polyethylenes in the middle layer is improved to a certain limit, and the antibacterial property and the puncture resistance of the vacuum compression bag are improved to a certain limit, so that the content of the vitamin C phosphate is not required to be increased continuously for reducing the production cost; for this reason, the applicant has finally determined through extensive research and experimental verification that the mass ratio of the low density polyethylene of the middle layer to the vitamin C phosphate of the present application is preferably as described above.
Preferably, the polyethylene C of the inner layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 95-105 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
Through adopting above-mentioned technical scheme, inlayer and product direct contact need higher toughness, metallocene polyethylene is the polyethylene that forms through metallocene catalyst polymerization, and its molecular structure is more even than linear low density polyethylene, and the mass distribution of molecular chain is narrower, therefore metallocene polyethylene has better intensity, hardness and toughness, consequently mixes low density polyethylene, linear low density polyethylene and metallocene polyethylene three together, can effectively satisfy the anti puncture performance requirement of vacuum compression bag inlayer.
Preferably, the mass ratio of the low-density polyethylene of the inner layer to the vitamin C phosphate is 25:0.4-0.5.
By adopting the technical scheme, when the content of the vitamin C phosphate is too low, various polyethylenes of the inner layer are difficult to soften further, so that the toughness and puncture resistance of the vacuum compression bag are difficult to improve further; when the content of the vitamin C phosphate is too high, the toughness of various polyethylenes of the inner layer is improved to a certain limit, the antibacterial property and the puncture resistance of the vacuum compression bag are improved to a certain limit, and the content of the vitamin C phosphate is not required to be increased continuously in order to reduce the production cost; for this reason, the applicant has finally determined through extensive research and experimental verification that the mass ratio of the low density polyethylene of the inner layer to the vitamin C phosphate of the present application is preferably as described above.
In a second aspect, the application provides a method for preparing a toughened puncture-resistant vacuum compression bag, which adopts the following technical scheme:
A preparation method of the toughened puncture-resistant vacuum compression bag is used for preparing the toughened puncture-resistant vacuum compression bag and comprises the following steps:
and (3) preparing an outer layer: weighing polyethylene A and PPA with the formula amount, uniformly mixing to obtain a first mixture, extruding and casting the first mixture to form a film, and obtaining an outer layer film;
Middle layer preparation: weighing polyethylene B and PPA with the formula amount, uniformly mixing to obtain an ethylene mixture, extruding and casting the ethylene mixture to form a film, and obtaining a middle layer film;
and (3) preparation of an inner layer: weighing polyethylene C, PPA with formula amount and vitamin C phosphate, uniformly mixing to obtain a polypropylene mixture, extruding and casting the polypropylene mixture to form a film, and obtaining an inner layer film;
Hot pressing and rewinding: and hot-pressing the outer layer film, the middle layer film and the inner layer film, rewinding and cutting, and installing a sealing zipper and a vacuum pumping hole.
By adopting the technical scheme, the outer layer film, the middle layer film and the inner layer film of the toughened puncture-resistant vacuum compression bag are formed in a tape casting mode, so that the step of compounding glue is omitted, and the production step is simplified; the toughness is stronger in a tape casting mode; vitamin C phosphate is added in the inner layer, so that the toughened puncture-resistant vacuum compression bag has good toughness, puncture resistance and lower haze.
Preferably, in the step of preparing the middle layer, if vitamin C phosphate is also included in the middle layer film, uniformly mixing the vitamin C phosphate, polyethylene B and PPA together to obtain the mixture B.
By adopting the technical scheme, the vitamin C phosphate is added into the middle layer film, so that the toughness of the middle layer film can be further improved, and the haze of the middle layer film can be reduced.
In summary, the application has the following beneficial effects:
1. because the vitamin C phosphate is added into the inner layer component contacted with the food, the toughness and the puncture resistance of the toughened puncture-resistant vacuum compression bag can be effectively ensured, and the haze of the toughened puncture-resistant vacuum compression bag can be reduced;
2. the vitamin C phosphate is also added into the middle layer, so that the toughness and the puncture resistance of the toughened puncture-resistant vacuum compression bag can be further improved, and the haze of the middle layer is reduced.
Detailed Description
The raw materials in the application comprise the following parts:
Low density polyethylene: commercial products of model 2426H;
Linear low density polyethylene: commercial products of model 7042;
Metallocene polyethylene: commercial products of model 1018 MF;
PPA (polyphthalamide): commercial product model A-4122LS WH678 was used;
Vitamin C phosphate: adopts commercial products with CAS number 23313-12-4 and active ingredient content more than or equal to 99%.
The present application will be described in further detail with reference to examples and comparative examples.
Example 1
A preparation method of a toughened puncture-resistant vacuum compression bag comprises the following steps:
And (3) preparing an outer layer: weighing 25kg of low-density polyethylene, 80kg of linear low-density polyethylene, 40 parts of metallocene polyethylene and 0.1kg of PPA, uniformly mixing to obtain a first mixture, extruding and casting the first mixture at 50rpm to form a film, and obtaining an outer layer film;
middle layer preparation: weighing 25kg of low-density polyethylene, 125kg of linear low-density polyethylene, 40kg of metallocene polyethylene and 0.1kg of PPA according to the formula, uniformly mixing to obtain an ethylene mixture, extruding and casting the ethylene mixture at 50rpm to form a film, and obtaining a middle layer film;
and (3) preparation of an inner layer: weighing 25kg of low-density polyethylene, 100kg of linear low-density polyethylene, 37.5kg of metallocene polyethylene, 0.1kg of PPA and 0.5kg of vitamin C phosphate, uniformly mixing to obtain a polypropylene mixture, extruding and casting the polypropylene mixture at 50rpm to form a film, and obtaining an inner layer film;
Hot pressing and rewinding: and hot-pressing the outer layer film, the middle layer film and the inner layer film, rewinding and cutting, and installing a sealing zipper and a vacuum pumping hole.
Examples 2 to 3
Examples 2-3 based on the preparation method of example 1, various polyethylene contents of polyethylene a and PPA contents in the outer layer film were adjusted, and specific adjustments are shown in table 1.
Comparative examples 1 to 2
Comparative examples 1-2 based on the preparation method of example 1, various polyethylene contents of polyethylene a and PPA contents in the outer layer film were adjusted, and specific adjustments are shown in table 1.
TABLE 1 ingredient formulation tables (unit: kg) and Performance test tables for examples 1-3 and comparative examples 1-2
| Project | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Low density polyethylene | 25 | 25 | 25 | 25 | 25 |
| Linear low density polyethylene | 80 | 70 | 75 | 65 | 85 |
| Metallocene polyethylene | 40 | 35 | 37.5 | 33 | 42 |
| PPA | 0.1 | 0.07 | 0.12 | 0.1 | 0.1 |
| Maximum tensile stress/N | 58.6 | 56.5 | 57.6 | 54.1 | 58.7 |
| Puncture strength/N | 13.2 | 12.6 | 12.9 | 11.4 | 13.3 |
| Haze/% | 18.7 | 19.3 | 19.1 | 19.8 | 18.7 |
Performance test the toughened puncture-resistant vacuum compression bags prepared in examples 1-3 and comparative examples 1-2 were subjected to the following performance measurements, the test results of which are shown in table 1.
1. Toughness of
The maximum tensile stress was measured according to the standard of GB/T1040-2006 "measurement of tensile Property of plastics". The film had dimensions 150mm by 20mm and a stretch rate of 20mm/min.
2. Puncture strength
The puncture strength was obtained by measuring according to the standard of GB/T8809-2015 method for anti-pendulum impact test of Plastic film. The greater the puncture strength, the better the puncture resistance.
3. Optical Properties
The haze was obtained by measuring according to GB/T2410-2008 "determination of light transmittance and haze of transparent plastics". The lower the haze, the better the light transmittance.
Referring to Table 1, comparative examples 1-3 and comparative examples 1-2 show that examples 2-3 have slightly lower toughness and puncture resistance than example 1 and slightly higher haze than example 1; both toughness and puncture resistance of comparative example 1 were lower than those of example 1, and haze was higher than that of example 1; the toughness, puncture resistance, and haze of comparative example 2 are substantially equivalent to those of example 1; this demonstrates that the toughened puncture resistant vacuum compression bag of example 1 performs better for cost savings.
Examples 4 to 6
Examples 4-6 based on the preparation method of example 1, various polyethylene contents, PPA contents and vitamin C phosphate contents of polyethylene C in the inner film were adjusted, and specific adjustments are shown in table 2.
Comparative examples 3 to 5
Comparative examples 3-5 based on the preparation method of example 1, the content of vitamin C phosphate in the inner film was adjusted, and specific adjustments are shown in table 2.
The toughened puncture resistant vacuum compression bags of examples 4-6 and comparative examples 3-5 were subjected to the performance test as described above, and the test results are shown in Table 2.
TABLE 2 ingredient ingredients Table (unit: kg) and Performance test Table for example 1, examples 4-6 and comparative examples 3-5
Referring to Table 2, comparative examples 1, examples 4-6 and comparative examples 3-5 demonstrate that comparative example 5 has much lower toughness and puncture resistance than example 1 and much higher haze than example 1, indicating that vitamin C phosphate is effective in improving toughness, puncture resistance and haze of toughened puncture resistant vacuum compression bags.
In comparison to example 1, examples 4-6 and comparative example 3 have lower toughness and puncture resistance than example 1, and have higher haze than example 1, and comparative example 4 has substantially equivalent toughness, puncture resistance, and haze as example 1; this demonstrates that the toughened puncture resistant vacuum compression bag of example 1 performs better for cost savings.
Examples 7 to 8
Examples 7-8 based on the preparation method of example 1, various polyethylene contents and PPA contents of polyethylene B in the middle layer film were adjusted, and specific adjustments are shown in table 3.
Comparative examples 6 to 7
Comparative examples 6-7 various polyethylene contents and PPA contents of polyethylene B in the middle layer film were adjusted based on the preparation method of example 1, and specific adjustments are shown in table 3.
The toughened puncture resistant vacuum compression bags of examples 7-8 and comparative examples 6-7 were subjected to the performance test as described above, and the test results are shown in Table 3.
TABLE 3 ingredients formulation (unit: kg) and performance test tables for example 1, examples 7-8 and comparative examples 6-7
Referring to Table 3, comparative examples 1, examples 7-8 and comparative examples 6-7 show that both toughness and puncture resistance are lower in examples 7-8 and comparative example 6 than in example 1, and haze is higher than in example 1; the toughness, puncture resistance, and haze of comparative example 7 are substantially equivalent to those of the examples; this demonstrates that the toughened puncture resistant vacuum compression bag of example 1 performs better for cost savings.
Examples 9 to 11
Example 9 based on the preparation method of example 1, 0.8kg of vitamin C phosphate and other components were mixed to obtain an ethyl mixture during middle layer preparation, and other conditions were unchanged, so as to prepare a new toughened puncture-resistant vacuum compression bag.
Examples 10-11 based on the preparation method of example 9, the content of vitamin C phosphate in the middle layer film was adjusted, and the specific adjustment is shown in table 4.
Comparative examples 8 to 9
Comparative examples 8-9 based on the preparation method of example 9, the content of vitamin C phosphate in the middle layer film was adjusted, and specific adjustments are shown in table 4.
The toughened puncture resistant vacuum compression bags of examples 9-11 and comparative examples 8-9 were subjected to the performance test as described above, and the test results are shown in Table 4.
TABLE 4 vitamin C phosphate content and Performance test Table for example 1, examples 9-11 and comparative examples 8-9
Referring to Table 4, comparative examples 1, examples 9-11 and comparative examples 8-9 demonstrate that example 9 has higher toughness and lower puncture resistance than example 1, and lower haze than example 1, compared to example 1, indicating that the addition of vitamin C phosphate to the middle film is effective in improving toughness, puncture resistance and lower haze of the toughened puncture resistant vacuum compression bag;
In comparison to example 9, examples 10-11 and comparative example 8 have lower toughness and puncture resistance than example 9, and have higher haze than example 9, and comparative example 9 has substantially equivalent toughness, puncture resistance, and haze as example 9; this demonstrates that the toughened puncture resistant vacuum compression bag of example 9 performs better for cost savings.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (9)
1. A toughened puncture-resistant vacuum compression bag, characterized in that: comprises an outer layer, a middle layer and an inner layer;
the outer layer comprises the following components in parts by weight: 130-145 parts of polyethylene A and 0.07-0.12 part of PPA;
the middle layer comprises the following components in parts by weight: 180-195 parts of polyethylene B and 0.07-0.12 part of PPA;
the inner layer comprises the following components in parts by weight: 155-170 parts of polyethylene C, 0.07-0.12 part of PPA and 0.3-0.5 part of vitamin C phosphate.
2. The toughened puncture resistant vacuum compression bag of claim 1 wherein: the polyethylene A of the outer layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 70-80 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
3. The toughened puncture resistant vacuum compression bag of claim 1 wherein: the polyethylene B of the middle layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 120-130 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
4. A toughened puncture resistant vacuum compression bag as claimed in claim 3 wherein: the middle layer also includes vitamin C phosphate.
5. The toughened puncture resistant vacuum compression bag of claim 4 wherein: the mass ratio of the low-density polyethylene of the middle layer to the vitamin C phosphate is 25:0.5-0.8.
6. The toughened puncture resistant vacuum compression bag of claim 1 wherein: the polyethylene C of the inner layer comprises the following components in parts by weight: 25 parts of low-density polyethylene, 95-105 parts of linear low-density polyethylene and 35-40 parts of metallocene polyethylene.
7. The toughened puncture resistant vacuum compression bag of claim 6 wherein: the mass ratio of the low-density polyethylene of the inner layer to the vitamin C phosphate is 25:0.4-0.5.
8. A method of making a toughened puncture resistant vacuum compression bag as claimed in any of claims 1 to 3 and 6 to 7, characterized by: the method comprises the following steps:
and (3) preparing an outer layer: weighing polyethylene A and PPA with the formula amount, uniformly mixing to obtain a first mixture, extruding and casting the first mixture to form a film, and obtaining an outer layer film;
Middle layer preparation: weighing polyethylene B and PPA with the formula amount, uniformly mixing to obtain an ethylene mixture, extruding and casting the ethylene mixture to form a film, and obtaining a middle layer film;
and (3) preparation of an inner layer: weighing polyethylene C, PPA with formula amount and vitamin C phosphate, uniformly mixing to obtain a polypropylene mixture, extruding and casting the polypropylene mixture to form a film, and obtaining an inner layer film;
Hot pressing and rewinding: and hot-pressing the outer layer film, the middle layer film and the inner layer film, rewinding and cutting, and installing a sealing zipper and a vacuum pumping hole.
9. The method of making a toughened puncture resistant vacuum compression bag as defined in claim 8, wherein: in the step of preparing the middle layer, if the middle layer film also comprises vitamin C phosphate, uniformly mixing the vitamin C phosphate, the polyethylene B and the PPA together to obtain an ethylene mixture.
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| CN202311790996.6A CN117698248B (en) | 2023-12-25 | 2023-12-25 | Toughened puncture-resistant vacuum compression bag and preparation method thereof |
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| JPS5478743A (en) * | 1977-12-07 | 1979-06-23 | Asahi Chem Ind Co Ltd | Film of crosslinked polyethylene |
| CN102604188A (en) * | 2012-03-02 | 2012-07-25 | 中国科学院宁波材料技术与工程研究所 | Antioxidant cross-linked polymer and preparation method thereof |
| CN105400036A (en) * | 2014-09-15 | 2016-03-16 | 海南瑞富源包装材料有限公司 | Anti-oxidation and ultraviolet-resistant polyethylene thermal shrinkage film and preparation method thereof |
| KR20190010948A (en) * | 2017-07-24 | 2019-02-01 | 소프트팩(주) | Packaging sheet for food using anti-oxidation material |
| JP2019127537A (en) * | 2018-01-25 | 2019-08-01 | 株式会社Ｉｔｏ Ｐｒｏ | Stable skinned polyurethane foam molding |
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| JPS5478743A (en) * | 1977-12-07 | 1979-06-23 | Asahi Chem Ind Co Ltd | Film of crosslinked polyethylene |
| CN102604188A (en) * | 2012-03-02 | 2012-07-25 | 中国科学院宁波材料技术与工程研究所 | Antioxidant cross-linked polymer and preparation method thereof |
| CN105400036A (en) * | 2014-09-15 | 2016-03-16 | 海南瑞富源包装材料有限公司 | Anti-oxidation and ultraviolet-resistant polyethylene thermal shrinkage film and preparation method thereof |
| KR20190010948A (en) * | 2017-07-24 | 2019-02-01 | 소프트팩(주) | Packaging sheet for food using anti-oxidation material |
| JP2019127537A (en) * | 2018-01-25 | 2019-08-01 | 株式会社Ｉｔｏ Ｐｒｏ | Stable skinned polyurethane foam molding |
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