CN101759896A - Polyethylene modified material for degradable garbage bags and preparation method thereof - Google Patents
Polyethylene modified material for degradable garbage bags and preparation method thereof Download PDFInfo
- Publication number
- CN101759896A CN101759896A CN200910212940A CN200910212940A CN101759896A CN 101759896 A CN101759896 A CN 101759896A CN 200910212940 A CN200910212940 A CN 200910212940A CN 200910212940 A CN200910212940 A CN 200910212940A CN 101759896 A CN101759896 A CN 101759896A
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- Prior art keywords
- garbage bags
- polyethylene
- modified material
- twin screw
- screw extruder
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Classifications
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The invention relates to a polyethylene modified material for degradable garbage bags and a preparation method thereof. The material comprises the following components in percentage by weight: 25-35 percent of corn starch, 60-70 percent of high-density polyethylene and 5-10 percent of polyethylene grafted maleic anhydride. The preparation process comprises the following steps of: uniformly mixing the corn starch, the high-density polyethylene and the polyethylene grafted maleic anhydride in a high-speed mixer; plasticizing and mixing an obtained mixture in a double-screw extruder; and extruding, cooling and dicing into particles to obtain the polyethylene modified material for the degradable garbage bags. The polyethylene modified material is used for the degradable garbage bags, and prepared garbage bags are light yellow and transparent and have bright and clean surfaces, no poison and harm, enough mechanical strength and certain degradability.
Description
Technical field
The present invention relates to polythene material, relate in particular to a kind of polyethylene modified material that is used for degradable garbage bags and preparation method thereof.
Background technology
At present, mostly the refuse bag that uses on the market is to make with the polyethylene raw material, commonly used has: hp-ldpe, low-pressure high-density polyethylene and linear low density polyethylene, also there is a spot of refuse bag to adopt Production of PVC, this refuse bag causes the very serious wasting of resources and environmental pollution because usage quantity is huge.Nondegradable refuse bag is embedded in underground need and rots through about 200 years ability, and severe contamination soil, if take the burning disposal mode, then can generate harmful flue dust and toxic gas, the chronic pollution environment.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of polyethylene modified material that is used for degradable garbage bags and preparation method thereof is provided, be intended to separate the refuse bag of to degrade and cause problems such as white pollution.
Purpose of the present invention is achieved through the following technical solutions:
The polyethylene modified material that is used for degradable garbage bags, characteristics are to comprise following composition and weight ratio: W-Gum: 25%～35%, and high density polyethylene(HDPE) 60%～70%, polycthylene grafted maleic anhydride 5%～10%.
Further, the above-mentioned polyethylene modified material that is used for degradable garbage bags, its component is: W-Gum 30%, high density polyethylene(HDPE) 65%, polycthylene grafted maleic anhydride 5%.
Further, the above-mentioned polyethylene modified material that is used for degradable garbage bags, the melt flow rate (MFR) of described high density polyethylene(HDPE) is 5～7g/10min, and tensile strength is greater than 22MPa, and elongation at break is greater than 500%; The percentage of grafting of described polycthylene grafted maleic anhydride is 0.85%, and melt flow rate (MFR) is 1～3g/10min.
The present invention is used for the preparation method of the polyethylene modified material of degradable garbage bags, may further comprise the steps:
1. raw material mixes: will make it to mix in W-Gum, high density polyethylene(HDPE), the polycthylene grafted maleic anhydride adding high-speed mixer according to proportioning;
2. at the twin screw extruder internal reaction: the mixture that 1. step is obtained adds in the twin screw extruder mixing; Twin screw extruder has six sections, and first section and second section extrusion temperature are at 170～190 ℃, and other several sections extrusion temperatures are between 190～220 ℃; The total residence time of reactant in twin screw extruder is 3～8min, and the twin screw extruder rotating speed is at 300～350r.min
-1
3. the material that obtains is extruded postcooling, pelletizing, promptly obtain being used for the polyethylene modified material of degradable garbage bags.
Further again, the preparation method of the above-mentioned polyethylene modified material that is used for degradable garbage bags, at first 30 parts of W-Gums, 65 parts of high density polyethylene(HDPE)s and 5 parts of polycthylene grafted maleic anhydrides are mixed in the high-speed mixing agent, then, mixture is mixing in twin screw extruder, and the temperature of each section of twin screw is respectively: T
1=170 ℃, T
2=180 ℃, T
3=190 ℃, T
4=205 ℃, T
5=210 ℃, T
6=220 ℃, the twin screw extruder rotating speed is r=350r.min
-1, last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
1. adopt the W-Gum filled polyethylene, W-Gum is dispersed in the polyethylene matrix, along with the biological degradation of W-Gum, the polyethylene modified material disintegration fragmentates, and makes polyethylene modified material have to a certain degree degradability;
2. adopt polycthylene grafted copolymer-maleic anhydride as expanding material, improve the dispersed of W-Gum and with the consistency of polyethylene matrix resin;
3. the refuse bag outward appearance of using material of the present invention to produce is yellowish transparent, and any surface finish is nontoxic;
4. use twin screw extruder in the production process of the present invention, cooling water circulation utilization does not produce waste water,waste gas and industrial residue, and can accomplish scale production.
Embodiment
In order to solve the environmental pollution that most of refuse bag non-degradable causes on the market, the present invention has developed a kind of polyethylene modified material that is used for degradable garbage bags, adopts the W-Gum filled polyethylene, and polycthylene grafted maleic anhydride is as expanding material.
The polyethylene modified material that is used for degradable garbage bags, weight ratio of constituents is: W-Gum: 25%～35%, high density polyethylene(HDPE) 60%～70%, polycthylene grafted maleic anhydride 5%～10%.Optimum formula is: W-Gum 30%, high density polyethylene(HDPE) 65%, polycthylene grafted maleic anhydride 5%.
Wherein, the melt flow rate (MFR) of high density polyethylene(HDPE) is 5～7g/10min, and tensile strength is greater than 22MPa, and elongation at break is greater than 500%; The percentage of grafting of polycthylene grafted maleic anhydride is 0.85%, and melt flow rate (MFR) is 1～3g/10min.
Concrete preparation technology is: 1. raw material mixes: will make it to mix in W-Gum, high density polyethylene(HDPE), the polycthylene grafted maleic anhydride adding high-speed mixer according to proportioning; 2. at the twin screw extruder internal reaction: the mixture that 1. step is obtained adds in the twin screw extruder mixing; Twin screw extruder has six sections, and first section and second section extrusion temperature are at 170～190 ℃, and other several sections extrusion temperatures are between 190～220 ℃; The total residence time of reactant in twin screw extruder is 3～8min, and the twin screw extruder rotating speed is at 300～350r.min
-13. the material that obtains is extruded postcooling, pelletizing, promptly obtain being used for the polyethylene modified material of degradable garbage bags.
Employing has the W-Gum of biological degradability as weighting agent, and when W-Gum reached certain content, along with the degraded of W-Gum, other compositions of polyethylene modified material were cracked into fragment, thereby have certain degradability.The present invention adds W-Gum guaranteeing that material has on the basis of necessary mechanical property in polythene material, make material have certain degradability.
Embodiment 1:
30 parts of W-Gums, 65 parts of high density polyethylene(HDPE)s and 5 parts of polycthylene grafted maleic anhydrides are mixed in high-speed mixer, then that mixture is mixing in twin screw extruder, the temperature of each section of twin screw extruder is set at T1=170 ℃, T2=180 ℃, T3=190 ℃, T4=205 ℃, T5=210 ℃, T6=220 ℃, the twin screw extruder rotating speed is r=350r.min
-1, last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
Embodiment 2:
28 parts of W-Gums, 62 parts of high density polyethylene(HDPE)s and 10 parts of polycthylene grafted maleic anhydrides are mixed in high-speed mixer, and then that mixture is mixing in twin screw extruder, the temperature of each section of twin screw extruder is set at T
1=170 ℃, T
2=190 ℃, T
3=195 ℃, T
4=200 ℃, T
5=205 ℃, T
6=210 ℃, the rotating speed of twin screw extruder is 300r/min, and is last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
Embodiment 3:
35 parts of W-Gums, 60 parts of high density polyethylene(HDPE)s and 5 parts of polycthylene grafted maleic anhydrides are mixed in high-speed mixer, and then that mixture is mixing in twin screw extruder, the temperature of each section of twin screw extruder is set at T
1=170 ℃, T
2=180 ℃, T
3=190 ℃, T
4=200 ℃, T
5=205 ℃, T
6=215 ℃, the twin screw extruder rotating speed is 320r/min, and is last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
Embodiment 4:
25 parts of W-Gums, 70 parts of high density polyethylene(HDPE)s and 5 parts of polycthylene grafted maleic anhydrides are mixed in high-speed mixer, and then that mixture is mixing in twin screw extruder, the temperature of each section of twin screw extruder is set at TT
1=170 ℃, T
2=180 ℃, T
3=190 ℃, T
4=205 ℃, T
5=210 ℃, T
6=220 ℃, the twin screw extruder rotating speed is 320r/min, and is last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
With being injection molded into the standard batten after the above embodiment products obtained therefrom drying, test its performance according to national standard, the result is as shown in table 1.
Table 1 embodiment test result
Can find out that from above-mentioned The performance test results its performance is very excellent.Except that having enough physical strengths, also has degradability to a certain degree.
In sum, the present invention adopts the W-Gum filled polyethylene, and W-Gum is dispersed in the polyethylene matrix, and along with the biological degradation of W-Gum, the polyethylene modified material disintegration fragmentates, and makes polyethylene modified material have to a certain degree degradability; Adopt polycthylene grafted copolymer-maleic anhydride as expanding material, improve the dispersed of W-Gum and with the consistency of polyethylene matrix resin; The refuse bag outward appearance of using material of the present invention to produce is yellowish transparent, and any surface finish is nontoxic; Use twin screw extruder in the production process of the present invention, cooling water circulation utilization does not produce waste water,waste gas and industrial residue, is easy to accomplish scale production.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (6)
1. the polyethylene modified material that is used for degradable garbage bags is characterized in that comprising following composition (weight percent): W-Gum: 25%～35%, and high density polyethylene(HDPE) 60%～70%, polycthylene grafted maleic anhydride 5%～10%.
2. the polyethylene modified material that is used for degradable garbage bags according to claim 1 is characterized in that its component has following weight percent: W-Gum 30%, high density polyethylene(HDPE) 65%, polycthylene grafted maleic anhydride 5%.
3. the polyethylene modified material that is used for degradable garbage bags according to claim 1 and 2 is characterized in that: the melt flow rate (MFR) of described high density polyethylene(HDPE) is 5～7g/10min, and tensile strength is greater than 22MPa, and elongation at break is greater than 500%.
4. the polyethylene modified material that is used for degradable garbage bags according to claim 1 and 2 is characterized in that: the percentage of grafting of described polycthylene grafted maleic anhydride is 0.85%, and melt flow rate (MFR) is 1～3g/10min.
5. the described preparation method who is used for the polyethylene modified material of degradable garbage bags of claim 1 is characterized in that: may further comprise the steps:
1. raw material mixes: will make it to mix in W-Gum, high density polyethylene(HDPE), the polycthylene grafted maleic anhydride adding mixture according to proportioning;
2. at the twin screw extruder internal reaction: the mixture that 1. step is obtained adds in the twin screw extruder mixing; Twin screw extruder has six sections, and first section and second section extrusion temperature are at 170～190 ℃, and other several sections extrusion temperatures are between 190～220 ℃, and the twin screw extruder rotating speed is at 300～350r.min
-1
3. the material that obtains is extruded postcooling, pelletizing, promptly obtain being used for the polyethylene modified material of degradable garbage bags.
6. the preparation method who is used for the polyethylene modified material of degradable garbage bags according to claim 5 is characterized in that: at first, 30 parts of W-Gums, 65 parts of high density polyethylene(HDPE)s, 5 parts of polycthylene grafted maleic anhydrides are mixed in mixing machine; Then, mixing at twin screw extruder, the temperature that twin screw is every section is respectively: T
1=170 ℃, T
2=180 ℃, T
3=190 ℃, T
4=205 ℃, T
5=210 ℃, T
6=220 ℃, the twin screw extruder rotating speed is r=350r.min
-1, last, the polyethylene modified material that extrude, cooling, pelletizing promptly obtains being used for degradable garbage bags.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212940A CN101759896A (en) | 2009-11-11 | 2009-11-11 | Polyethylene modified material for degradable garbage bags and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212940A CN101759896A (en) | 2009-11-11 | 2009-11-11 | Polyethylene modified material for degradable garbage bags and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101759896A true CN101759896A (en) | 2010-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910212940A Pending CN101759896A (en) | 2009-11-11 | 2009-11-11 | Polyethylene modified material for degradable garbage bags and preparation method thereof |
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| CN (1) | CN101759896A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276898A (en) * | 2011-07-04 | 2011-12-14 | 武汉华丽生物材料有限公司 | Degradable rat-proof biobased garbage bag and preparation method thereof |
| CN103224569A (en) * | 2013-04-07 | 2013-07-31 | 华南理工大学 | Large-molecular hydrophobic anhydride modified starch and preparation method thereof |
| CN103570976A (en) * | 2013-10-16 | 2014-02-12 | 池州市大恒生化有限公司 | Master batches |
| CN110982153A (en) * | 2019-12-23 | 2020-04-10 | 湖州祥恒包装有限公司 | Degradable polyethylene film and preparation method thereof |
| CN114311906A (en) * | 2021-12-31 | 2022-04-12 | 晋江市祥兴纸塑彩印有限公司 | Polyethylene composite packaging bag and processing technology thereof |
| CN114987967A (en) * | 2022-06-30 | 2022-09-02 | 江苏洁雅家居用品有限公司 | Degradable garbage bag produced by using waste plastics and preparation method thereof |
-
2009
- 2009-11-11 CN CN200910212940A patent/CN101759896A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276898A (en) * | 2011-07-04 | 2011-12-14 | 武汉华丽生物材料有限公司 | Degradable rat-proof biobased garbage bag and preparation method thereof |
| CN103224569A (en) * | 2013-04-07 | 2013-07-31 | 华南理工大学 | Large-molecular hydrophobic anhydride modified starch and preparation method thereof |
| CN103224569B (en) * | 2013-04-07 | 2015-04-22 | 华南理工大学 | Large-molecular hydrophobic anhydride modified starch and preparation method thereof |
| CN103570976A (en) * | 2013-10-16 | 2014-02-12 | 池州市大恒生化有限公司 | Master batches |
| CN110982153A (en) * | 2019-12-23 | 2020-04-10 | 湖州祥恒包装有限公司 | Degradable polyethylene film and preparation method thereof |
| CN114311906A (en) * | 2021-12-31 | 2022-04-12 | 晋江市祥兴纸塑彩印有限公司 | Polyethylene composite packaging bag and processing technology thereof |
| CN114311906B (en) * | 2021-12-31 | 2024-01-30 | 晋江市祥兴纸塑彩印有限公司 | Polyethylene composite packaging bag and processing technology thereof |
| CN114987967A (en) * | 2022-06-30 | 2022-09-02 | 江苏洁雅家居用品有限公司 | Degradable garbage bag produced by using waste plastics and preparation method thereof |
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Application publication date: 20100630 |