CN114805976A - Fusible asphalt packaging bag and preparation method thereof - Google Patents

Fusible asphalt packaging bag and preparation method thereof Download PDF

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Publication number
CN114805976A
CN114805976A CN202110070967.7A CN202110070967A CN114805976A CN 114805976 A CN114805976 A CN 114805976A CN 202110070967 A CN202110070967 A CN 202110070967A CN 114805976 A CN114805976 A CN 114805976A
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China
Prior art keywords
asphalt
packaging bag
mass
area
density polyethylene
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CN202110070967.7A
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Chinese (zh)
Inventor
蔺习雄
司承卉
张艳莉
王援
杨克红
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Petrochina Co Ltd
Petrochina Karamay Petrochemical Co
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Petrochina Co Ltd
Petrochina Karamay Petrochemical Co
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Priority to CN202110070967.7A priority Critical patent/CN114805976A/en
Publication of CN114805976A publication Critical patent/CN114805976A/en
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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
    • 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
    • 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
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • 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
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • 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
    • C08L2207/04—Thermoplastic elastomer
    • 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

Abstract

The invention provides a fusible asphalt packaging bag and a preparation method thereof. The first aspect of the invention provides a fusible asphalt packaging bag, which is obtained by mixing a main agent and an auxiliary agent, and then performing melt granulation, film blowing and seal cutting, wherein the main agent comprises 60-80% of resin, 5-20% of granular asphalt, 0-20% of thermoplastic elastomer and 0-15% of performance reinforcing agent by mass percent; the auxiliary agent comprises a lubricant and an antioxidant. The asphalt packaging bag provided by the invention does not need to be stirred in 130-plus 155 ℃ asphalt, can be completely mixed and melted with the asphalt after standing for 20-45 minutes, has no obvious influence on the performance of the asphalt after being mixed and melted with the asphalt packaging bag, and the performance of the asphalt mixed and melted with the asphalt packaging bag can still meet the standard requirements of various stages of pavement construction, maintenance, quality inspection, acceptance and the like.

Description

Fusible asphalt packaging bag and preparation method thereof
Technical Field
The invention relates to a fusible asphalt packaging bag and a preparation method thereof, and relates to the technical field of asphalt packaging bags.
Background
The fusible asphalt packaging bag is an asphalt packaging bag which can be mixed and melted with asphalt at a certain temperature, and the fusible asphalt packaging bag can avoid inconvenience brought to construction due to stripping or salvaging of an infusible bag body and can better solve the problems of asphalt packaging bag waste and environmental pollution, so that the development of the asphalt packaging bag which can be mixed and melted with the asphalt is of great significance.
For example, the chinese patent with the publication number CN101412829B discloses a polyolefin/polycarbonate alloy film for fusible asphalt packaging bags, the main raw materials of the film comprise polypropylene and polyethylene, the packaging bag can be completely melted in asphalt by stirring at the temperature of 160-; chinese patent No. CN100543085C discloses a mixture for use as a packaging material for asphalt products, which includes a dense metallic material that, when mixed with asphalt, affects the properties of asphalt and degrades the pavement properties of asphalt, and further, metal substances that do not settle down in time during the heating of asphalt may damage pipelines and valves along with the transportation of molten asphalt.
Disclosure of Invention
The invention provides a fusible asphalt packaging bag and a preparation method thereof, which are used for reducing the melting temperature of the asphalt packaging bag and ensuring that the asphalt packaging bag does not cause obvious influence on the property of asphalt, and the performance of asphalt mixed and melted with the asphalt packaging bag can still meet the performance requirements of asphalt pavement in each stage of construction, maintenance, quality inspection, acceptance and the like.
The invention provides a fusible asphalt packaging bag, which is prepared by mixing a main agent and an auxiliary agent, melting, granulating, film blowing, sealing and cutting, wherein,
the main agent comprises, by mass, 60-80% of resin, 5-20% of granular asphalt, 0-20% of thermoplastic elastomer and 0-15% of performance reinforcing agent;
the auxiliary agent comprises a lubricant and an antioxidant, wherein the mass of the lubricant is 0.3-3.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent;
wherein, the resin comprises 28 to 55 percent of high density polyethylene, 25 to 45 percent of linear low density polyethylene, 0 to 30 percent of polypropylene and 0 to 15 percent of ethylene-vinyl acetate copolymer by mass percent;
the penetration degree of the granular asphalt at 25 ℃ is less than 10, and the softening point is more than 110 ℃.
The invention provides a fusible asphalt packaging bag, which selects proper resin and granular asphalt with high softening point as main components of the asphalt packaging bag, concretely, the resin at least comprises high density polyethylene and linear low density polyethylene, the melting point of the high density polyethylene is lower than that of polypropylene, which is beneficial to reducing the melting point of the asphalt packaging bag, and the high density polyethylene has a larger melt index, which is beneficial to rapidly melting after reaching the melting point, and simultaneously, the melting point of the high density polyethylene is higher than that of the linear low density polyethyleneSo as to ensure the temperature resistance of the asphalt packaging bag and the mechanical properties of the film, while the linear low density polyethylene can improve the tensile strength and tear strength of the film, and those skilled in the art know that the density value of the high density polyethylene is 0.941-1.96g/cm 3 The density value of the linear low-density polyethylene is 0.918-0.935g/cm 3 The difference between the polyethylene and the low-density polyethylene is that long-chain branches do not exist in the structure, and the linear structure enables the polyethylene to have different rheological properties, can enhance the performances of stretching resistance, penetration resistance, impact resistance and tear resistance, and is more suitable for processing films. Further, it is understood that the mass percentage of each component in the resin is a mass percentage of each component to the total mass of the resin, for example, the mass percentage (%) of the high-density polyethylene is a mass of the high-density polyethylene/(a mass of the high-density polyethylene + a mass of the linear low-density polyethylene + a mass of the polypropylene + a mass of the ethylene-vinyl acetate copolymer) 100%, and the mass percentage of each component in the main agent is a mass percentage of each component to the total mass of the main agent, for example, the mass percentage (%) of the resin is a mass of the resin/(a total mass of the resin + a mass of the particulate asphalt + a mass of the thermoplastic elastomer + a mass of the performance reinforcing agent) 100%; in order to further improve the comprehensive performance of the asphalt packaging bag, the resin can also comprise polypropylene and ethylene-vinyl acetate copolymer, wherein the polypropylene is beneficial to improving the heat resistance of the asphalt packaging bag and facilitating the filling of asphalt, and the ethylene-vinyl acetate copolymer is beneficial to improving the toughness and the processability of the asphalt packaging bag; the high-softening-point granular asphalt is granular asphalt with the penetration degree of less than 10 at 25 ℃ and the softening point of more than 110 ℃, the high-softening-point granular asphalt is selected to facilitate the mixing and melting of the asphalt packaging bag and the asphalt on the premise of ensuring the heat-resistant temperature of the asphalt packaging bag, and the granular asphalt is used for replacing part of resin, so that the production cost can be reduced, and in addition, the ultraviolet aging resistance of the packaging bag can be improved by the prepared black packaging bag; in addition, in order to further improve other properties of the asphalt packaging bag, a thermoplastic elastomer, a property reinforcing agent and other auxiliary agents can be added, and the selection can be carried out by a person skilled in the art according to actual needs. The asphalt packaging bag provided by the invention is 130-1The asphalt at 55 ℃ does not need to be stirred, can be completely mixed and melted with the asphalt after standing for 20-45 minutes, is convenient to use under the conditions that melting equipment is simple and crude on a construction site and stirring conditions do not exist, and the reduction of the melting temperature is beneficial to reducing the emission of asphalt smoke and reducing the environmental pollution; meanwhile, the asphalt packaging bag provided by the invention has no obvious influence on the performance of asphalt after being melted into the asphalt, and the performance of the asphalt mixed and melted with the asphalt packaging bag can still meet the standard requirements of various stages of pavement construction, maintenance, quality inspection, acceptance and the like; finally, the granular asphalt is used for replacing part of resin, so that the production cost can be reduced, and the prepared black packaging bag is also beneficial to improving the ultraviolet aging resistance of the packaging bag.
In order to further improve the comprehensive performance of the asphalt packaging bag, the mass percentage of each component can be further limited, and specifically, the main agent comprises 68-78% of resin, 10-18% of granular asphalt, 5-15% of thermoplastic elastomer and 0-12% of performance reinforcing agent by mass percentage;
the mass of the lubricant is 0.3-2.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent.
The specific selection of the components is further illustrated below:
in order to further improve the comprehensive performance of the asphalt packaging bag, the components in the resin can be further selected, and specifically, the high-density polyethylene is selected from one or more of film-grade high-density polyethylene with the melt flow rate of 0.2-2g/10min, blow-molding-grade high-density polyethylene with the melt flow rate of 0.2-2g/10min and injection-molding-grade high-density polyethylene with the melt flow rate of 5-10g/10 min;
the linear low density polyethylene has a melt flow rate of 0.2 to 6g/10 min.
The melt flow rate of the polypropylene is 8-26g/10min, and the melting point is 146-150 ℃;
the weight percentage of the vinyl acetate in the ethylene-vinyl acetate copolymer is 5-30%.
The granular asphalt is hard asphalt or natural asphalt.
The hard asphalt can be high-softening-point granular asphalt produced by using petroleum asphalt as a raw material and adopting an oxidation process and a solvent deasphalting process, wherein the oxidation process and the solvent deasphalting process are carried out according to the conventional technical means in the field, and the solvent can be butane or pentane.
In order to further improve the toughness of the asphalt packaging bag and reduce the influence on the asphalt performance, the thermoplastic elastomer is ethylene-octene copolymer or ethylene propylene diene monomer.
The ethylene-octene copolymer has narrower relative molecular weight distribution and short chain branch distribution, has certain crystallinity, crystalline ethylene chain links in the structure are used as physical cross-linking points to bear load, and amorphous ethylene and octene long chain contribute to elasticity, so that the flexibility and puncture resistance of the resin can be improved, the processability and impact performance of the resin can be improved, the ethylene-octene copolymer has good compatibility with polyolefin, the melting point is lower, and the melting temperature of an asphalt packaging bag can be reduced, therefore, the thermoplastic elastomer is further preferably the ethylene-octene copolymer.
Further, the performance reinforcing agent is obtained by filling inorganic filler with polyethylene; the inorganic filler is selected from one of calcium carbonate, talcum powder, silicon dioxide and carbon black.
The performance reinforcing agent has the effects of improving the mechanical strength of the asphalt packaging bag, improving the rigidity, heat resistance and dimensional stability of the asphalt packaging bag and reducing the cost of the asphalt packaging bag.
Further, the lubricant is selected from one of paraffin, stearic acid and calcium stearate.
The lubricant functions to improve the processing fluidity of the plastic and to improve the compatibility between the raw materials.
Further, the antioxidant is a phenolic antioxidant or an amine antioxidant commonly used in the art, and specifically, is one selected from the group consisting of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant 1098.
In conclusion, the asphalt packaging bag provided by the invention does not need to be stirred in 130-155 ℃ asphalt, can be completely mixed and melted with asphalt after standing for 20-45 minutes, is convenient for being used under the conditions that melting equipment on a construction site is simple and crude and stirring conditions do not exist, and reduces the melting temperature, thus being beneficial to reducing the emission of asphalt smoke and reducing the environmental pollution; meanwhile, after the asphalt is melted into the asphalt packaging bag, the asphalt packaging bag has no obvious influence on the performance of the asphalt, and the performance of the asphalt mixed and melted with the asphalt packaging bag can still meet the standard requirements of various stages of pavement construction, maintenance, quality inspection, acceptance inspection and the like; finally, asphalt is used for replacing part of resin, so that the production cost can be reduced, and the prepared black packaging bag is also beneficial to improving the ultraviolet aging resistance of the packaging bag.
The second aspect of the invention provides a preparation method of any one of the asphalt packaging bags, which comprises the following steps:
1) mixing the main agent and the auxiliary agent to obtain a mixture;
the main agent comprises the following components in percentage by mass: 60-80% of resin, 5-20% of granular asphalt, 0-20% of thermoplastic elastomer and 0-15% of performance reinforcing agent;
the auxiliary agent comprises a lubricant and an antioxidant, wherein the mass of the lubricant is 0.3-3.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent;
wherein, the resin comprises 28 to 55 percent of high density polyethylene, 25 to 45 percent of linear low density polyethylene, 0 to 30 percent of polypropylene and 0 to 15 percent of ethylene-vinyl acetate copolymer by mass percent;
the penetration degree of the granular asphalt at 25 ℃ is less than 10, and the softening point is more than 110 ℃;
2) carrying out melt granulation on the mixture to obtain mixed granules;
3) and blowing the mixed granules to obtain a double-folded plastic film bag, and sealing and cutting to obtain the asphalt packaging bag.
The invention provides a preparation method of an asphalt packaging bag, which comprises the steps of firstly, taking 28-55% of high-density polyethylene and 25-45% of linear low-density polyethylene as main body materials of resin, further matching 0-30% of polypropylene and 0-15% of ethylene-vinyl acetate copolymer to obtain resin, and then matching 60-80% of resin, 5-20% of granular asphalt, further matching 0-20% of thermoplastic elastomer, 0-15% of performance reinforcing agent and other auxiliary agents to obtain a mixture; secondly, melting and granulating the mixture to obtain mixed granules; and finally, putting the mixed granules into a film blowing machine, continuously extruding the melt through a film opening, performing upward blowing and blowing by using compressed air, cooling by using an air ring and performing variable-frequency traction to obtain a double-folded plastic film bag, and sealing and cutting the double-folded plastic film bag according to actual production requirements to obtain the asphalt packaging bag. The processing equipment and the preparation process required by the preparation method provided by the invention are simple and easy to operate, the prepared asphalt packaging bag does not need to be stirred in asphalt at the temperature of 130-155 ℃, can be completely mixed and melted with the asphalt after standing for 20-45 minutes, has higher mechanical strength and good tear resistance, and can avoid asphalt leakage in the processes of filling, storage and transportation.
In one embodiment, in order to mix the components uniformly, the temperature of the melt granulation in step 2) is 140-215 ℃.
Further, in order to avoid the phenomena of bark shape, uneven thickness and the like of the film, in the step 3), the film blowing temperature is 135-210 ℃, and the thickness of the double-folded plastic film bag is 0.06-0.08 mm.
Further, the sealing and cutting temperature is 190-210 ℃.
The implementation of the invention has at least the following advantages:
1. the asphalt packaging bag provided by the invention does not need to be stirred in 130-155 ℃ asphalt, can be completely mixed and melted with the asphalt after standing for 20-45 minutes, is convenient for being used under the conditions that melting equipment on a construction site is simple and crude and stirring conditions do not exist, and reduces the melting temperature, thereby being beneficial to reducing the emission of asphalt smoke and reducing the environmental pollution; meanwhile, the asphalt packaging bag provided by the invention has no obvious influence on the performance of asphalt after being melted into the asphalt, and the performance of the asphalt mixed and melted with the asphalt packaging bag can still meet the standard requirements of various stages of pavement construction, maintenance, quality inspection, acceptance inspection and the like.
2. The invention uses the granular asphalt to replace partial resin, can reduce the production cost, and the prepared black packaging bag is also beneficial to improving the ultraviolet aging resistance of the packaging bag.
3. The processing equipment and the preparation process required by the preparation method provided by the invention are simple and easy to operate, and the prepared asphalt packaging bag has higher mechanical strength and good tear resistance, and can avoid asphalt leakage in the filling, storage and transportation processes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The injection-molded high-density polyethylenes used in the following examples, DMDA-8008, DMDA-8007, DGDA-6944NT, and the film-grade high-density polyethylene TR 144; linear low density polyethylene LL0209, DFDA-7042; polypropylene K4912, K4826, R370Y; ethylene vinyl acetate 1615, 1641 are commercially available;
the penetration degree of hard asphalt (hereinafter referred to as oxidized asphalt) produced by an oxidation process at 25 ℃ is 7, the softening point is 116 ℃, the penetration degree of hard asphalt (hereinafter referred to as butane deasphalting) produced by a butane deasphalting process at 25 ℃ is 5, the softening point is 127 ℃, the penetration degree of hard asphalt (hereinafter referred to as pentane deasphalting) produced by a pentane deasphalting process at 25 ℃ is 4, the softening point is 132 ℃, the penetration degree of natural asphalt at 25 ℃ is 1, and the softening point is 145 ℃;
thermoplastic elastomer ethylene-octene copolymer POE 9371, LC100, Dow 8999; ethylene propylene diene monomer EPDM 5015 and antioxidants 1010, 1076, 1024 and 1098 were all commercially available;
the twin-screw extruder used was SHJ-20C manufactured by Nanjing Jennt electromechanical Co., Ltd; the film blowing machine is XH-430B produced by Dongguan Xihua detecting instrument Co.
Example 1
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
69% of a resin, wherein the resin comprises 37.5% of high density polyethylene DMDA 8008, 37.5% of linear low density polyethylene LL0209, and 25% of polypropylene K4912; 14% deasphalting with butane; 12% of a thermoplastic elastomer POE Dow 8999; 5% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant stearic acid and antioxidant 1010, wherein the mass of the stearic acid is 0.3% of that of the main agent, and the mass of the antioxidant 1010 is 0.03% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein the granulation process temperature is 150-215 ℃, and the temperature of each area of the double-helix extruder is as follows: 160 ℃ in the first area, 185 ℃ in the second area, 215 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.067mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 165 ℃, the second zone is 180 ℃, the third zone is 200 ℃, and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones 165 deg.C, six zones 155 deg.C, seven zones (film ports) 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; the asphalt can be completely melted after standing for 40 minutes without stirring at the temperature of 152 ℃.
Example 2
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
65% of resin, wherein the resin comprises 33% of high density polyethylene DMDA 8008, 33% of linear low density polyethylene LL0209, 22% of polypropylene K4826 and 12% of ethylene-vinyl acetate copolymer 1641; deasphalting with 16% pentane; 5% of a thermoplastic elastomer POE 9371; 14% of performance reinforcing agent talcum powder PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1010, wherein the mass of the calcium stearate is 1.2% of that of the main agent, and the mass of the antioxidant 1010 is 0.5% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 145-215 ℃, and the temperature of each area of the double-helix extruder is as follows: the first zone is 150 ℃, the second zone is 175 ℃, the third zone is 215 ℃, the fourth zone is 180 ℃, the fifth zone is 165 ℃ and the head is 145 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 140-210 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.062mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 160 ℃ in the first area, 180 ℃ in the second area, 210 ℃ in the third area and 180 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones 163 ℃, six zones 150 ℃, seven zones (film openings) 140 ℃.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 135 ℃ is filled; the asphalt can be completely melted after standing for 35 minutes without stirring at 155 ℃.
Example 3
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
72% of resin, wherein the resin comprises 42% of high density polyethylene DMDA 8007, 30% of linear low density polyethylene LL0209, 18% of polypropylene K4912 and 10% of ethylene-vinyl acetate copolymer 1641; deasphalting 12% of butane; 10% of a thermoplastic elastomer POE 9371; 6% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1076, wherein the mass of the calcium stearate is 3% of that of the main agent, and the mass of the antioxidant 1076 is 1% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-205 ℃, and the temperature of each area of the double-helix extruder is as follows: 157 ℃ in the first area, 180 ℃ in the second area, 205 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.066mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 165 ℃, the second zone is 182 ℃, the third zone is 200 ℃ and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones at 168 deg.C, six zones at 155 deg.C, and seven zones (film ports) at 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 136 ℃ is filled; the asphalt can be completely melted after standing for 40 minutes without stirring at the temperature of 152 ℃.
Example 4
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
80% of resin, wherein the resin comprises 55% of high density polyethylene DGDA-6944NT, 28% of linear low density polyethylene DFDA-7042, 12% of polypropylene K4912 and 5% of ethylene-vinyl acetate copolymer 1615; 8% of natural asphalt; 7% of a thermoplastic elastomer POE Dow 8999; 5% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant stearic acid and antioxidant 1098, wherein the mass of the stearic acid is 2% of that of the main agent, and the mass of the antioxidant 1098 is 0.25% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 145-205 ℃, and the temperature of each area of the double-helix extruder is as follows: 148 ℃ in the first area, 175 ℃ in the second area, 205 ℃ in the third area, 178 ℃ in the fourth area, 160 ℃ in the fifth area and 145 ℃ in the head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 140-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.074mm, and finally, sealing and cutting at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 160 ℃, the second zone is 180 ℃, the third zone is 200 ℃, and the fourth zone is 180 ℃; the temperature of the membrane head zone was controlled as follows: five zones 163 ℃, six zones 150 ℃, seven zones (film openings) 140 ℃.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; stirring is not needed in the asphalt at 150 ℃, and the asphalt can be quickly and completely melted after standing for 40 minutes.
Example 5
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
62% of resin, wherein the resin comprises 45% of high density polyethylene TR144, 45% of linear low density polyethylene DFDA-7042 and 10% of ethylene-vinyl acetate copolymer 1615; 18% of oxidized asphalt; 20% of a thermoplastic elastomer POE Dow 8999;
the auxiliary agent comprises a lubricant stearic acid and an antioxidant 1010, wherein the mass of the stearic acid is 2.4% of that of the main agent, and the mass of the antioxidant 1010 is 0.75% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein the temperature of the granulation process is 140-: the first area is 144 ℃, the second area is 165 ℃, the third area is 190 ℃, the fourth area is 170 ℃, the fifth area is 155 ℃, and the head is 140 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 135-180 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.08mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 155 ℃ in the first area, 165 ℃ in the second area, 180 ℃ in the third area and 170 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: 157 ℃ in the fifth zone, 145 ℃ in the sixth zone and 135 ℃ in the seventh zone (membrane port).
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 128 ℃ is filled; stirring is not needed in the asphalt at 130 ℃, and the asphalt can be quickly and completely melted after standing for 45 minutes.
Example 6
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
60% of resin, wherein the resin comprises 48% of high density polyethylene DMDA 8008, 30% of linear low density polyethylene LL0209, 16% of polypropylene R370Y and 6% of ethylene-vinyl acetate copolymer 1641; deasphalting 15% of butane; 10% of a thermoplastic elastomer POE Dow 8999; 15% performance reinforcing agent talcum powder PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1010, wherein the mass of the calcium stearate is 1.8% of that of the main agent, and the mass of the antioxidant 1010 is 0.6% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-210 ℃, and the temperature of each area of the double-helix extruder is as follows: the first zone is 156 ℃, the second zone is 180 ℃, the third zone is 210 ℃, the fourth zone is 185 ℃, the fifth zone is 170 ℃, and the head is 150 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.065mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 165 ℃, the second zone is 180 ℃, the third zone is 200 ℃, and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones at 170 deg.C, six zones at 155 deg.C, and seven zones (membrane ports) at 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; the asphalt can be completely melted after standing for 30 minutes without stirring at the temperature of 152 ℃.
Example 7
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
68% of a resin, wherein the resin comprises 35% of high density polyethylene DMDA 8007, 35% of linear low density polyethylene LL0209, and 30% of polypropylene K4826; deasphalting with 13% pentane; 14% of POE LC 100; 5% of performance reinforcing agent silicon dioxide PE master batch;
the auxiliary agent comprises lubricant paraffin and an antioxidant 1024, wherein the mass of the paraffin is 0.5% of that of the main agent, and the mass of the antioxidant 1024 is 0.8% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 155-215 ℃, and the temperature of each area of the double-helix extruder is as follows: 160 ℃ in the first area, 178 ℃ in the second area, 215 ℃ in the third area, 182 ℃ in the fourth area, 168 ℃ in the fifth area and 155 ℃ in the machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 150-210 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.076mm, and finally, sealing and cutting at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 168 ℃ in the first area, 185 ℃ in the second area, 210 ℃ in the third area and 188 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones at 170 deg.C, six zones at 160 deg.C, and seven zones (membrane ports) at 150 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; the asphalt can be quickly and completely melted after standing for 45 minutes without stirring at 155 ℃.
Example 8
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
70% of resin, wherein the resin comprises 36% of high density polyethylene DMDA 8007, 36% of linear low density polyethylene DFDA-7042, 24% of polypropylene R370Y and 4% of ethylene-vinyl acetate copolymer 1641; 10% deasphalting of butane; 8% of a thermoplastic elastomer EPDM 5015; 12% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant stearic acid and antioxidant 1076, wherein the mass of the stearic acid is 2.2% of that of the main agent, and the mass of the antioxidant 1076 is 0.05% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein the granulation process temperature is 150-215 ℃, and the temperature of each area of the double-helix extruder is as follows: 160 ℃ in the first area, 185 ℃ in the second area, 215 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-210 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.068mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine divide into feed cylinder district and membrane head district, and the temperature in each district of control feed cylinder is: the first zone is 165 ℃, the second zone is 185 ℃, the third zone is 210 ℃, and the fourth zone is 188 ℃; the temperature of the membrane head zone was controlled as follows: five zones at 168 deg.C, six zones at 155 deg.C, and seven zones (film ports) at 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at the temperature of 140 ℃ is filled; the asphalt can be completely melted by standing for 40 minutes without stirring at 155 ℃.
Example 9
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
76% of resin, wherein the resin comprises 32% of high density polyethylene DMDA 8008, 32% of linear low density polyethylene DFDA-7042, 21% of polypropylene K4912 and 15% of ethylene-vinyl acetate copolymer 1641; 5% of oxidized asphalt; 10% of a thermoplastic elastomer POE Dow 8999; 9% of performance reinforcing agent talcum powder PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1098, wherein the mass of the calcium stearate is 1% of that of the main agent, and the mass of the antioxidant 1098 is 0.28% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-210 ℃, and the temperature of each area of the double-helix extruder is as follows: the first area is 158 ℃, the second area is 185 ℃, the third area is 210 ℃, the fourth area is 182 ℃, the fifth area is 165 ℃ and the head is 150 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-205 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.06mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 165 ℃, the second zone is 180 ℃, the third zone is 205 ℃, and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones at 168 deg.C, six zones at 155 deg.C, and seven zones (film ports) at 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when being filled with the asphalt at 139 ℃; the asphalt can be completely melted after standing for 30 minutes without stirring at 155 ℃.
Example 10
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
65% of resin, wherein the resin comprises 52% of high density polyethylene DMDA 8008, 30% of linear low density polyethylene LL0209, 12% of polypropylene K4912 and 6% of ethylene-vinyl acetate copolymer 1641; 20% of oxidized asphalt; 15% performance reinforcing agent talcum powder PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1024, wherein the mass of the calcium stearate is 0.8% of that of the main agent, and the mass of the antioxidant 1024 is 0.35% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 145-200 ℃, and the temperature of each area of the double-helix extruder is as follows: the first zone is 152 ℃, the second zone is 175 ℃, the third zone is 200 ℃, the fourth zone is 180 ℃, the fifth zone is 165 ℃ and the head is 145 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 138-195 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.07mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 158 ℃ in the first area, 175 ℃ in the second area, 195 ℃ in the third area and 178 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones at 160 ℃, six zones at 150 ℃ and seven zones (film openings) at 138 ℃.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; the asphalt can be completely melted after standing for 35 minutes without stirring at the temperature of 150 ℃.
Example 11
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
69% of a resin, wherein the resin comprises 35% of high density polyethylene DMDA 8007, 35% of linear low density polyethylene LL0209, 18% of polypropylene K4826, and 12% of ethylene vinyl acetate 1615; deasphalting with 13% pentane; 9% of thermoplastic elastomer POE LC 100; 9% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1010, wherein the mass of the calcium stearate is 0.3% of that of the main agent, and the mass of the antioxidant 1010 is 0.9% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 145-205 ℃, and the temperature of each area of the double-helix extruder is as follows: the first zone is 152 ℃, the second zone is 175 ℃, the third zone is 205 ℃, the fourth zone is 180 ℃, the fifth zone is 165 ℃ and the head is 145 ℃;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 142-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.066mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 160 ℃, the second zone is 180 ℃, the third zone is 200 ℃, and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones 165 ℃, six zones 150 ℃ and seven zones (film ports) 142 ℃.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 137 ℃ is filled; the asphalt can be completely melted after standing for 40 minutes without stirring at the temperature of 152 ℃.
Example 12
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
75% of resin, wherein the resin comprises 46% of high-density polyethylene TR144, 46% of linear low-density polyethylene DFDA-7042 and 8% of ethylene-vinyl acetate copolymer 1641; 10% of oxidized asphalt; 8% of a thermoplastic elastomer POE Dow 8999; 7% of performance reinforcing agent silicon dioxide PE master batch;
the auxiliary agent comprises lubricant stearic acid and antioxidant 1076, wherein the mass of the stearic acid is 1.6 percent of that of the main agent, and the mass of the antioxidant 1076 is 0.06 percent of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein the granulation process temperature is 140-185 ℃, and the temperature of each zone of the double-helix extruder is as follows: 145 ℃ in the first area, 165 ℃ in the second area, 185 ℃ in the third area, 170 ℃ in the fourth area, 155 ℃ in the fifth area and 140 ℃ in the machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 138-;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 158 ℃ in the first area, 170 ℃ in the second area, 180 ℃ in the third area and 170 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones 160 ℃, six zones 148 ℃, seven zones (film ports) 138 ℃.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 127 ℃ is filled; the asphalt can be completely melted after standing for 20 minutes without stirring at 135 ℃.
Example 13
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
66% of resin, wherein the resin comprises 28% of high density polyethylene DMDA 8008, 44% of linear low density polyethylene LL0209, 22% of polypropylene R370Y, and 6% of ethylene-vinyl acetate copolymer 1641; deasphalting 15% of butane; 10% of a thermoplastic elastomer POE Dow 8999; 9% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant stearic acid and antioxidant 1010, wherein the mass of the stearic acid is 2.5% of that of the main agent, and the mass of the antioxidant 1010 is 0.08% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-210 ℃, and the temperature of each area of the double-helix extruder is as follows: 155 ℃ in the first area, 180 ℃ in the second area, 210 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 142-200 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.075mm, and finally, the double-folded plastic film bag is sealed and cut at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 160 ℃ in the first area, 180 ℃ in the second area, 200 ℃ in the third area and 180 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones at 162 deg.C, six zones at 152 deg.C, and seven zones (film ports) at 142 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when filled with asphalt at 138 ℃; the asphalt can be completely melted after standing for 40 minutes without stirring at 155 ℃.
Example 14
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
74% of resin, wherein the resin comprises 42% of high density polyethylene DMDA 8008, 42% of linear low density polyethylene DFDA-7042, 8% of polypropylene K4912 and 8% of ethylene-vinyl acetate copolymer 1615; deasphalting 12% of butane; 12% of a thermoplastic elastomer POE 9371; 2% of a performance enhancing agent carbon black PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1024, wherein the mass of the calcium stearate is 1.6% of that of the main agent, and the mass of the antioxidant 1024 is 0.92% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 145-190 ℃, and the temperature of each area of the double-helix extruder is as follows: 148 ℃ in the first area, 170 ℃ in the second area, 190 ℃ in the third area, 175 ℃ in the fourth area, 160 ℃ in the fifth area and 145 ℃ in the head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 140-185 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.062mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 160 ℃ in the first area, 170 ℃ in the second area, 185 ℃ in the third area and 175 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones at 162 deg.C, six zones at 150 deg.C, and seven zones (film ports) at 140 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 133 ℃ is filled; the asphalt can be completely melted after standing for 40 minutes without stirring at the temperature of 150 ℃.
Example 15
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
68% of a resin, wherein the resin comprises 39% of high density polyethylene DGDA-6944NT, 39% of linear low density polyethylene LL0209, and 22% of polypropylene K4912; 17% deasphalting with butane; 8% of a thermoplastic elastomer EPDM 5015; 7% of a performance enhancing agent carbon black PE master batch;
the auxiliary agent comprises lubricant calcium stearate and an antioxidant 1098, wherein the mass of the calcium stearate is 2.0% of that of the main agent, and the mass of the antioxidant 1098 is 0.1% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-210 ℃, and the temperature of each area of the double-helix extruder is as follows: 155 ℃ in the first area, 180 ℃ in the second area, 210 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 145-205 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.069mm, and finally, sealing and cutting are carried out at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: the first zone is 165 ℃, the second zone is 180 ℃, the third zone is 205 ℃, and the fourth zone is 185 ℃; the temperature of the membrane head zone was controlled as follows: five zones 165 deg.C, six zones 155 deg.C, seven zones (film ports) 145 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 136 ℃ is filled; the asphalt can be completely melted after standing for 40 minutes without stirring at 155 ℃.
Example 16
The asphalt packaging bag provided by the embodiment comprises the following main agents in percentage by mass:
76% of a resin, wherein the resin comprises 50% of high density polyethylene TR144, 25% of linear low density polyethylene LL0209, and 25% of polypropylene K4912; 11% of natural asphalt; 8% of a thermoplastic elastomer POE Dow 8999; 5% of performance reinforcing agent calcium carbonate PE master batch;
the auxiliary agent comprises lubricant paraffin and an antioxidant 1076, wherein the mass of the paraffin is 1.2% of that of the main agent, and the mass of the antioxidant 1076 is 0.05% of that of the main agent.
The preparation method of the asphalt packaging bag provided by the embodiment comprises the following steps:
1) the raw materials are mixed according to the mass percentage to obtain a mixture.
2) Putting the obtained mixture into an SHJ-20C double-screw extruder for melt blending, extruding and granulating to obtain mixed granules,
wherein, the temperature of the granulation process is 150-210 ℃, and the temperature of each area of the double-helix extruder is as follows: 155 ℃ in the first area, 180 ℃ in the second area, 210 ℃ in the third area, 185 ℃ in the fourth area, 170 ℃ in the fifth area and 150 ℃ in a machine head;
3) putting the mixed granules into a film blowing machine XH-430B to obtain a double-folded plastic film bag, wherein the film blowing process temperature is 150 ℃ and 212 ℃, the thickness of the double-folded plastic film bag obtained by blowing is 0.078mm, and finally, sealing and cutting at about 210 ℃ to obtain an asphalt packaging bag;
in the blown film technology, the blown film machine is divided into a material cylinder area and a film head area, and the temperature of each area of the material cylinder is controlled as follows: 170 ℃ in the first area, 188 ℃ in the second area, 212 ℃ in the third area and 190 ℃ in the fourth area; the temperature of the membrane head zone was controlled as follows: five zones at 172 deg.C, six zones at 160 deg.C, and seven zones (membrane ports) at 150 deg.C.
The asphalt packaging bag obtained in the embodiment has no problems of stickiness and bag leakage when the asphalt at 135 ℃ is filled; the asphalt can be completely melted after standing for 45 minutes without stirring at 155 ℃.
The invention further tests the mechanical properties of the double-folded plastic film prepared in step 2) in examples 1-16, wherein the tensile strength and the elongation at break are tested according to GB/T1040, the right-angle tear strength is tested according to QB/T1130, and the test results are shown in Table 1;
in addition, the performance of the asphalt and the asphalt packaging bag before and after the mixing and melting is also tested, and the specific test method and the result are shown in tables 2-3:
TABLE 1 results of mechanical Properties test of double-folded Plastic films during preparation of asphalt packages as provided in examples 1-16
Figure BDA0002905763930000191
TABLE 2 asphalt testing results before and after mixing and melting with the asphalt packages provided in examples 1-6
Figure BDA0002905763930000192
Figure BDA0002905763930000201
TABLE 3 results of performance testing before and after blending asphalt with the asphalt packages provided in examples 7-16
Figure BDA0002905763930000202
As can be seen from tables 2-3, compared with the original asphalt, the asphalt mixed and melted with the asphalt packaging bag has slightly reduced penetration, slightly increased softening point, reduced ductility at 10 ℃ and increased viscosity, the penetration after aging is slightly reduced, and the ductility is reduced compared with the value after the original aging, but has no obvious influence on the asphalt property on the whole, and can still meet the grade A standard of JTG F40-2004 for the index requirement of No. 90 road asphalt products.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A fusible asphalt packaging bag is characterized in that the asphalt packaging bag is obtained by mixing a main agent and an auxiliary agent, then performing melt granulation, film blowing and seal cutting, wherein,
the main agent comprises, by mass, 60-80% of resin, 5-20% of granular asphalt, 0-20% of thermoplastic elastomer and 0-15% of performance reinforcing agent;
the auxiliary agent comprises a lubricant and an antioxidant, wherein the mass of the lubricant is 0.3-3.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent;
wherein, the resin comprises 28 to 55 percent of high density polyethylene, 25 to 45 percent of linear low density polyethylene, 0 to 30 percent of polypropylene and 0 to 15 percent of ethylene-vinyl acetate copolymer by mass percent;
the penetration degree of the granular asphalt at 25 ℃ is less than 10, and the softening point is more than 110 ℃.
2. The fusible asphalt packaging bag according to claim 1, wherein the main agent comprises 68-78% by mass of resin, 10-18% by mass of granular asphalt, 5-15% by mass of thermoplastic elastomer and 0-12% by mass of performance reinforcing agent;
the mass of the lubricant is 0.3-2.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent.
3. The fusible asphalt packaging bag according to claim 1 or 2, wherein the high density polyethylene is selected from one or more of a film grade high density polyethylene having a melt flow rate of 0.2 to 2g/10min, a blow molding grade high density polyethylene having a melt flow rate of 0.2 to 2g/10min, an injection molding grade high density polyethylene having a melt flow rate of 5 to 10g/10 min;
the linear low density polyethylene has a melt flow rate of 0.2 to 6g/10 min.
4. The fusible asphalt packaging bag as claimed in claim 1 or 2, wherein the melt flow rate of the polypropylene is 8-26g/10min, and the melting point is 146-;
the weight percentage of the vinyl acetate in the ethylene-vinyl acetate copolymer is 5-30%.
5. The fusible asphalt package of any one of claims 1 to 4, wherein the particulate asphalt is hard asphalt or natural asphalt.
6. The fusible asphalt package of any one of claims 1 to 4, wherein the thermoplastic elastomer is ethylene-octene copolymer or ethylene propylene diene monomer.
7. The fusible asphalt package of any one of claims 1 to 4, wherein the performance enhancer is obtained by filling polyethylene with an inorganic filler; the inorganic filler is selected from one of calcium carbonate, talcum powder, silicon dioxide and carbon black.
8. A method for preparing the asphalt packaging bag according to any one of claims 1 to 7, comprising the steps of:
1) mixing the main agent and the auxiliary agent to obtain a mixture;
the main agent comprises the following components in percentage by mass: 60-80% of resin, 5-20% of granular asphalt, 0-20% of thermoplastic elastomer and 0-15% of performance reinforcing agent;
the auxiliary agent comprises a lubricant and an antioxidant, wherein the mass of the lubricant is 0.3-3.0% of that of the main agent, and the mass of the antioxidant is 0.03-1.0% of that of the main agent;
wherein, the resin comprises 28 to 55 percent of high density polyethylene, 25 to 45 percent of linear low density polyethylene, 0 to 30 percent of polypropylene and 0 to 15 percent of ethylene-vinyl acetate copolymer by mass percent;
the penetration degree of the granular asphalt at 25 ℃ is less than 10, and the softening point is more than 110 ℃;
2) carrying out melt granulation on the mixture to obtain mixed granules;
3) and blowing the mixed granules to obtain a double-folded plastic film bag, and sealing and cutting to obtain the asphalt packaging bag.
9. The method for preparing asphalt packaging bag according to claim 8, wherein the temperature of the melting granulation in step 2) is 140-215 ℃.
10. The method for preparing an asphalt packaging bag according to claim 8, wherein in the step 3), the film blowing temperature is 135-210 ℃, and the thickness of the double-folded plastic film bag is 0.06-0.08 mm.
CN202110070967.7A 2021-01-19 2021-01-19 Fusible asphalt packaging bag and preparation method thereof Pending CN114805976A (en)

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