CN112210150A - Heat-resistant plastic bag and preparation method thereof - Google Patents
Heat-resistant plastic bag and preparation method thereof Download PDFInfo
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- CN112210150A CN112210150A CN202011113669.3A CN202011113669A CN112210150A CN 112210150 A CN112210150 A CN 112210150A CN 202011113669 A CN202011113669 A CN 202011113669A CN 112210150 A CN112210150 A CN 112210150A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 93
- 239000004033 plastic Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title abstract description 10
- -1 polyethylene Polymers 0.000 claims abstract description 102
- 239000004698 Polyethylene Substances 0.000 claims abstract description 80
- 229920000573 polyethylene Polymers 0.000 claims abstract description 80
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000004014 plasticizer Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000008187 granular material Substances 0.000 claims abstract description 3
- 239000004962 Polyamide-imide Substances 0.000 claims description 21
- 229920002312 polyamide-imide Polymers 0.000 claims description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 20
- 239000001257 hydrogen Substances 0.000 claims description 20
- 229920002050 silicone resin Polymers 0.000 claims description 17
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 7
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims description 6
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 235000013773 glyceryl triacetate Nutrition 0.000 claims description 4
- 239000001087 glyceryl triacetate Substances 0.000 claims description 4
- 235000012424 soybean oil Nutrition 0.000 claims description 4
- 239000003549 soybean oil Substances 0.000 claims description 4
- 229960002622 triacetin Drugs 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 239000010456 wollastonite Substances 0.000 claims description 3
- 229910052882 wollastonite Inorganic materials 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 2
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 22
- 229920000642 polymer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 5
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
- B29C48/023—Extruding materials comprising incompatible ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7128—Bags, sacks, sachets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The application relates to the field of plastic bags, and particularly discloses a heat-resistant plastic bag and a preparation method thereof. A heat-resistant plastic bag is prepared from the following raw materials in parts by weight: 90-100 parts of polyethylene; 30-40 parts of a filler; 3-8 parts of a heat-resistant agent; 10-15 parts of a plasticizer; 1-3 parts of a stabilizer; 1-2 parts of a lubricant; the preparation method comprises the following steps: s1, weighing polyethylene, filler, heat-resistant agent, plasticizer, stabilizer and lubricant according to the proportion, and stirring and mixing uniformly; s2, extrusion molding, cutting into granules, blowing film, pressing edge, and obtaining the plastic bag. The heat-resistant plastic bag can be used as a gift bag and a shopping bag and has the advantage of excellent heat resistance; in addition, the preparation method has the advantage of sufficient plasticization.
Description
Technical Field
The application relates to the field of plastic bags, in particular to a heat-resistant plastic bag and a preparation method thereof.
Background
The plastic bag is a bag made of plastic as a main raw material, is an essential article in daily life, is applied to various fields of people production and life, and is often used for containing other articles. Plastic bags are widely used because of their advantages of being inexpensive, extremely light in weight, waterproof, large in capacity, and easy to store.
At present, plastic bags are usually made of synthetic resins (polyethylene, polypropylene, polyvinyl chloride, or the like) as main raw materials mixed with other auxiliary materials. Plastics made from polyethylene as a major raw material are commonly made into gift bags, shopping bags, cosmetic packaging bags, and the like.
In view of the above-mentioned related technologies, the inventor found that when the polyethylene plastic bag is applied to the outer packaging of foods such as milk tea, take-out and the like, the polyethylene plastic bag is easily aged and deformed in a high-temperature environment of more than 70 ℃, thereby affecting the service life and the application range of the plastic bag.
Disclosure of Invention
In order to improve the heat resistance of a polyethylene plastic bag, the application provides a heat-resistant plastic bag, a preparation method thereof and a preparation method thereof.
In a first aspect, the present application provides a heat-resistant plastic bag, which adopts the following technical scheme:
a heat-resistant plastic bag is prepared from the following raw materials in parts by weight:
90-100 parts of polyethylene;
30-40 parts of a filler;
3-8 parts of a heat-resistant agent;
10-15 parts of a plasticizer;
1-3 parts of a stabilizer;
1-2 parts of a lubricant.
By adopting the technical scheme, the polyethylene has the advantages of excellent mechanical property, strong acid and alkali resistance, good chemical stability, low production cost, wide application range and the like.
The heat resistance of the polyethylene plastic bag is improved through the heat-resistant agent, so that the polyethylene plastic bag can keep normal physical and chemical properties at higher temperature without degeneration; the dimensional stability of the polyethylene plastic bag is improved by the filler; by adding the plasticizer into the polyethylene plastic bag, plasticizer molecules are inserted between polymer molecular chains, so that the stress among the polymer molecular chains is weakened, the mobility of the polymer molecular chains is increased, and the crystallinity of the polymer molecular chains is reduced, thereby increasing the plasticity of the polymer; the possibility of thermal decomposition of polyethylene in the production, processing and use processes is effectively reduced by adding the stabilizer; by adding the lubricant, the smoothness of the surface of the product is effectively improved, and the viscosity between the plastic and a mold during molding is effectively reduced.
Compared with the related technology, the scheme improves the heat resistance of the polyethylene plastic bag by using the heat-resistant agent, improves the stress strength and the smoothness of the polyethylene plastic bag by combining other components, and prolongs the service life and the application range of the polyethylene plastic bag.
Preferably, the heat resistance is prepared from the following raw materials in parts by weight:
20-38 parts of phenyl hydrogen-containing silicone resin;
65-87 parts of polyamide-imide.
By adopting the technical scheme, the synergistic effect of the phenyl hydrogen-containing silicone resin and the polyamide imide is utilized, heat is absorbed under the high-temperature environment, and the separation of the plasticizer and the polyethylene at the high temperature is inhibited, so that the possibility that the plasticizer is separated from the plastic bag and enters food is reduced, the use safety of the polyethylene plastic bag is improved, the application range of the polyethylene plastic bag is expanded, and the service life of the polyethylene plastic bag is prolonged.
Preferably, the heat-resistant agent is prepared from the following raw materials in parts by weight:
25-33 parts of phenyl hydrogen-containing silicone resin;
67-85 parts of polyamide-imide.
By adopting the technical scheme, the phenyl hydrogen-containing silicone resin and the polyamide imide with specific doping amounts are added, so that better synergistic effect is generated between the phenyl hydrogen-containing silicone resin and the polyamide imide, and the heat resistance of the polyethylene plastic bag is effectively improved.
Preferably, the heat-resistant agent is prepared from the following raw materials in parts by weight:
30 parts of phenyl hydrogen-containing silicone resin;
70 parts of polyamide-imide.
By adopting the technical scheme, the phenyl hydrogen-containing silicon resin and the polyamide-imide with specific doping amounts are added, so that the synergistic effect between the phenyl hydrogen-containing silicon resin and the polyamide-imide is optimal, and the heat resistance of the polyethylene plastic bag is better improved.
Preferably, the filler is selected from one or more of calcium carbonate, glass fiber, asbestos, or wollastonite powder.
By adopting the technical scheme, the calcium carbonate has the advantages of wide source and low price, and the addition of the calcium carbonate can change the rheological property of the plastic and improve the surface gloss and the surface smoothness of the plastic; the glass fiber can enhance the tensile strength of the polyethylene plastic bag; asbestos can improve the tensile strength and chemical corrosion resistance of the polyethylene plastic bag; the zeolite powder can improve the acid resistance, the flexibility and the stability of the polyethylene plastic bag; the wollastonite powder can improve the mechanical property of polyethylene plastics and reduce the production cost thereof.
Preferably, the plasticizer is selected from one or more of glyceryl triacetate, epoxidized soybean oil, dibasic acid ester and benzene polyacid ester.
By adopting the technical scheme, the flexibility of the polyethylene plastic bag can be improved by taking the glyceryl triacetate as a plasticizer, and the glyceryl triacetate is non-toxic and non-irritant and can improve the safety of the polyethylene plastic bag; orientation force is generated between the dibasic acid ester and the polyethylene, so that the plasticity of the polyethylene plastic bag is enhanced; the benzene polyacid ester has high viscosity and low mobility, and can improve the tensile strength and stability of the polyethylene plastic bag; the epoxidized soybean oil has good heat resistance, is nontoxic and harmless, and improves the use safety of the polyethylene plastic bag.
Preferably, the stabilizer is selected from one or more of sodium stearate, zinc stearate and epoxy resin.
By adopting the technical scheme, the zinc stearate and the sodium stearate can improve the thermal stability in the production of the polyethylene plastic bag; the epoxy resin can improve the heat resistance and chemical resistance of the polyethylene plastic bag.
Preferably, the lubricant is selected from one or more of stearic acid, polyethylene wax, glyceryl monostearate and glyceryl tristearate.
By adopting the technical scheme, stearic acid has good compatibility with organic matters and is insoluble in water, so that the lubricity of the surface of the polyethylene plastic bag is improved, and the possibility of sticking the plastic bag with other objects in production and use is reduced; the polyethylene wax can improve the fluidity of polyethylene, thereby improving the lubricity of the polyethylene plastic bag; the glycerin monostearate is a good organic solvent, and can improve the dispersibility and uniformity of each component in the polyethylene plastic bag; the tristearin can improve the surface lubricity and surface smoothness of the polyethylene plastic bag.
In a second aspect, the present application provides a method for preparing a heat-resistant plastic bag, which adopts the following technical scheme:
s1, weighing polyethylene, filler, heat-resistant agent, plasticizer, stabilizer and lubricant according to the proportion, and uniformly stirring and mixing;
s2, extrusion molding, cutting into granules, blowing film, pressing edge, and obtaining the plastic bag.
By adopting the technical scheme, the filling agent is mixed with the polyethylene, and then the auxiliary raw materials such as the heat-resistant agent, the plasticizer and the like are added for mixing reaction, so that the prepared polyethylene plastic bag has good heat resistance, the heat resistance of the polyethylene plastic bag is improved, the application range of the polyethylene plastic bag is enlarged, and the service life of the polyethylene plastic bag is prolonged.
Preferably, in the step S2, a screw extruder is used for extrusion molding, the screw extruder comprises a conveying section, a compression section and a metering section, the temperature of the conveying section of the extruder is 90-110 ℃, the temperature of the compression section is 160-180 ℃, and the temperature of the metering section is 120-140 ℃.
By adopting the technical scheme, different temperatures are adopted in different working sections of the extruder, so that materials can be fully plasticized and uniformly mixed, and the plasticizing quality and the physical and chemical properties of polyethylene are improved.
In summary, the present application has the following beneficial effects:
1. the polyethylene plastic bag is produced by using polyethylene as a main raw material, the polyethylene plastic bag is poor in heat resistance, and the heat resistance of the produced polyethylene plastic bag can be obviously improved by adding the heat-resistant agent into the processing technology of the polyethylene plastic bag, so that the polyethylene plastic bag can have a wider application range and a longer service life;
2. according to the preparation method, the synergistic effect between the phenyl hydrogen-containing silicone resin and the polyamide imide is utilized, so that the connection stability of all components of the polyethylene plastic bag is effectively improved, and the high-temperature resistance of the polyethylene plastic bag is improved;
3. this application is through adopting different temperatures in the different workshop sections of extruder for the material can obtain abundant plastify under the circumstances of abundant mixing, has improved the physicochemical property of polyethylene plastic bag, and then has improved the life of polyethylene plastic bag.
Detailed Description
The following examples further illustrate the present application in detail.
The sources of the raw material components of the application are shown in the table 1:
TABLE 1 sources of the components
Example 1 to example 6
Examples 1 to 6 were prepared by the same method except that the blending amount of each component was different, as shown in table 2:
table 2: examples 1-6 the amounts of the respective raw material components
In examples 1 to 6, the heat-resistant agents were each a mixture of a phenyl hydrosilicon resin and a polyamideimide at a weight ratio of 30: 70.
Taking example 3 as an example, the preparation process of the high temperature resistant plastic bag is described as follows:
s1, weighing polyethylene, filler, heat-resistant agent, plasticizer, stabilizer and lubricant according to the proportion, and uniformly stirring and mixing;
and S2, performing extrusion molding by using a screw extruder, granulating, blowing a film, and pressing edges to obtain the plastic bag.
The conveying temperature of the conveying section of the screw extruder is 100 ℃, the temperature of the compression section is 170 ℃, and the temperature of the metering section is 130 ℃.
Example 7
This example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight: 87 phenyl hydrogen-containing silicone resin and polyamide imide.
Example 8
This example differs from example 3 only in that: the heat-resistant agent is prepared from 38: 66 of phenyl hydrogen-containing silicone resin and polyamide imide.
Example 9
This example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight: 65 phenyl hydrogen-containing silicon resin and polyamide imide.
Example 10
This example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight: 85 of phenyl hydrogen-containing silicone resin and polyamide imide.
Example 11
This example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight of 33: 72 phenyl hydrogen-containing silicone resin and polyamide imide.
Example 12
This example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight of 27: 67 phenyl hydrogen-containing silicone resin and polyamide imide.
Comparative example 1
Polyethylene bags purchased from Asahi packaging products Co., Ltd, Dongguan were used as the comparative examples.
Comparative example 2
This comparative example differs from example 3 only in that: the amount of the heat-resistant agent used was 2 g.
Comparative example 3
This comparative example differs from example 3 only in that: the heat-resistant agent comprises the following components in percentage by weight: 60 of phenyl hydrogen-containing silicone resin and polyamide imide.
Comparative example 4
The comparative example is different from the example 3 only in the mixing amount of each raw material component: 80g of polyethylene, 3g of phenyl hydrogen-containing silicone resin, 7g of polyamide-imide, 50g of glass fiber, 8g of epoxidized soybean oil, 8g of benzene polyacid ester, 4g of zinc stearate and 3g of polyethylene wax.
Comparative example 5
This comparative example differs from example 3 only in that: the filler was replaced with an equal amount of carbon black.
The polyethylene plastic bags in each example and each comparative example were subjected to performance tests according to the following procedures:
(1) in each embodiment and each proportion, seven groups of five samples are taken, each group of five samples are placed in ovens with different temperatures, the test samples are placed for 1 hour, and the change of each group of samples is observed;
(2) in each example and each comparative example, 5 specimens were taken and the tensile strength was measured with reference to GB/T1040.1-2006 standard for the measurement of the tensile properties of plastics.
Table 3: polyethylene plastic bags in each example and each comparative example were tested for temperature resistance
Table 4: tensile Strength test results of the polyethylene Plastic bags molded in examples 1 to 9
Table 5: example 10-example 12 and comparative examples tensile Strength test results for Medium Plastic polyethylene bags
Referring to table 3, it can be seen from the comparison between each example and each comparative example that the compounding ratio of the heat-resistant agent in example 3 can exert the best synergistic effect, and exhibit the best heat-resistant performance, so that the polyethylene plastic bag has a wider application range and a longer service life.
Referring to table 3, the polyethylene bags of examples 1 to 12 all had significantly improved heat resistance, exhibited superior heat resistance, and exhibited no significant thermal deformation at 90 ℃ or lower, compared to comparative example 1. Compared with comparative example 4, examples 1 to 12 show better heat resistance, which shows that the compounding ratio disclosed by the invention has better heat resistance. The polyethylene plastic bags of examples 1 to 12 exhibited better heat resistance than those of comparative example 5, indicating that the combination of the components disclosed in the present invention exhibited better heat resistance.
Referring to tables 4 and 5, the polyethylene plastic bags of examples 1 to 12 all exhibited better tensile strength than comparative example 1, indicating that the heat-resistant agent combined with other components can enhance the tensile strength of the polyethylene plastic bags. Compared with comparative example 4, the polyethylene plastic bags of examples 1 to 12 show better tensile properties, which shows that the polyethylene plastic bags prepared according to the proportioning data disclosed by the invention have better tensile strength and are beneficial to prolonging the service life of the polyethylene plastic bags.
Referring to tables 3, 4 and 5, the polyethylene bags of examples 1 to 12 exhibited superior heat resistance and tensile properties as compared to comparative example 2 and comparative example 3, indicating that the polyethylene bags produced using the range of the amount of the heat resistant agent disclosed in the present invention had better heat resistance and tensile strength.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. A heat-resistant plastic bag characterized in that: the feed is prepared from the following raw materials in parts by weight:
90-100 parts of polyethylene;
30-40 parts of a filler;
3-8 parts of a heat-resistant agent;
10-15 parts of a plasticizer;
1-3 parts of a stabilizer;
1-2 parts of a lubricant.
2. A heat-resistant plastic bag according to claim 1, wherein: the heat-resistant agent is prepared from the following raw materials in parts by weight:
20-38 parts of phenyl hydrogen-containing silicone resin;
65-87 parts of polyamide-imide.
3. A heat-resistant plastic bag according to claim 2, wherein: the heat-resistant agent is prepared from the following raw materials in parts by weight:
25-33 parts of phenyl hydrogen-containing silicone resin;
67-85 parts of polyamide-imide.
4. A heat-resistant plastic bag according to claim 3, wherein: the heat-resistant agent is prepared from the following raw materials in parts by weight:
30 parts of phenyl hydrogen-containing silicone resin;
70 parts of polyamide-imide.
5. A heat-resistant plastic bag according to claim 1, wherein: the filler is selected from one or more of calcium carbonate, glass fiber, asbestos, zeolite powder or wollastonite powder.
6. A heat-resistant plastic bag according to claim 1, wherein: the plasticizer is selected from one or more of glyceryl triacetate, epoxidized soybean oil, aliphatic dibasic acid ester and benzene polyacid ester.
7. A heat-resistant plastic bag according to claim 1, wherein: the stabilizer is selected from one or more of sodium stearate, zinc stearate and epoxy resin.
8. A heat-resistant plastic bag according to claim 1, wherein: the lubricant is selected from one or more of stearic acid, polyethylene wax, glyceryl monostearate and glyceryl tristearate.
9. The method of manufacturing a heat-resistant plastic bag according to any one of claims 1 to 8, wherein: the method comprises the following steps:
s1, weighing polyethylene, filler, heat-resistant agent, plasticizer, stabilizer and lubricant according to the proportion, and stirring and mixing uniformly;
s2, extrusion molding, cutting into granules, blowing film, pressing edge, and obtaining the plastic bag.
10. The method of manufacturing a heat-resistant plastic bag according to claim 9, wherein: in the step S2, a screw extruder is adopted for extrusion molding, the screw extruder comprises a conveying section, a compression section and a metering section, the temperature of the conveying section of the screw extruder is 90-110 ℃, the temperature of the compression section is 160-180 ℃, and the temperature of the metering section is 120-140 ℃.
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| CN101296795A (en) * | 2005-10-24 | 2008-10-29 | 东燃化学株式会社 | Polyolefin multilayer microporous film, method for producing same and battery separator |
| CN106046519A (en) * | 2016-07-21 | 2016-10-26 | 苏州泰仑电子材料有限公司 | High-temperature-resistant shrink protective film and preparation method thereof |
| CN109206724A (en) * | 2018-11-26 | 2019-01-15 | 陈冰玉 | A kind of formula of clear PE plastic foil |
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2020
- 2020-10-17 CN CN202011113669.3A patent/CN112210150A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296795A (en) * | 2005-10-24 | 2008-10-29 | 东燃化学株式会社 | Polyolefin multilayer microporous film, method for producing same and battery separator |
| CN106046519A (en) * | 2016-07-21 | 2016-10-26 | 苏州泰仑电子材料有限公司 | High-temperature-resistant shrink protective film and preparation method thereof |
| CN109206724A (en) * | 2018-11-26 | 2019-01-15 | 陈冰玉 | A kind of formula of clear PE plastic foil |
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Application publication date: 20210112 |