CN105968500A - Degradable modified polyethylene plastic for packaging and preparation method thereof - Google Patents
Degradable modified polyethylene plastic for packaging and preparation method thereof Download PDFInfo
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- CN105968500A CN105968500A CN201610404494.9A CN201610404494A CN105968500A CN 105968500 A CN105968500 A CN 105968500A CN 201610404494 A CN201610404494 A CN 201610404494A CN 105968500 A CN105968500 A CN 105968500A
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- 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
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Abstract
The invention provides a preparation method of degradable modified polyethylene plastic for packaging and belongs to the field of plastic, in particular to the preparation method of the degradable modified polyethylene plastic. The preparation method mainly includes the steps that under a high pressure condition, modified starch, EVA, hydroxy propyl cellulose and Pulullan are utilized to prepare modified polyethylene, then the modified polyethylene is added to a mixture of polyethylene alcohol, starch, dicumyl peroxide, a silane coupling agent and octodecane amide, and the degradable modified polyethylene plastic is prepared in a mixed mode in a twin-screw extruder at a high temperature. A prepared polyethylene plastic product has extremely good transparency and glossiness, is free of dust collection, free of static electricity, good in printing adaptability, high in tensile strength and elongation, good in wear resistance, extremely good in air barrier property and fragrance maintenance, excellent in water resistance and degradability and particularly suitable for being used for packaging materials.
Description
Technical field
The present invention relates to a kind of packaging material and preparation method thereof, particularly relate to a kind of packaging degradable modified poly ethylene plastics and preparation method thereof.
Background technology
In packaging industry, the thin-film material that macromolecular material prepares is applied widely, has very many uses in packaging bag, packing box.The kind of thin-film material is the most, and the composite film material that different materials prepares also has different functions and different character.
Polyethylene, due to light weight, nontoxic, has the dielectric properties of excellence, chemical stability and the advantage such as anticorrosive, and cheap, and processing and forming is easy, can be widely applied to be applied to packaging industry.Along with the development of science and technology, the performance for polythene material is had higher requirement, it is desirable to it has more excellent mechanical property and heat-resisting ageing-resisting performance.Therefore, the focus studied at present time for polyethylene modified.CN
103881187 A disclose a kind of carbon nano-fiber modified polyethylene material, and its component proportioning by weight percent is: polyethylene 50%-70%, carbon nano-fiber 3%-15%, filler 15%-40%, compatilizer 2%-5%, dispersant 0.1%-2%, coupling agent 0.1%-1%, antioxidant 0.1%-1%, other additive 0.1%-1%.The carbon nano-fiber modified polyethylene material of this invention, has high intensity, high resiliency, high rigidity and significantly improves antistatic effect.CN 1817954 A discloses a kind of polyolefin/lamellar silicate composite nanomaterial and preparation method thereof, the step of preparation process of its composite is: be passed through nitrogen in the reactor, then by polyolefin, unmodified phyllosilicate, the first monomer, second comonomer, Third monomer, initiator, soak swelling, modified master will be dried to obtain under product vacuum state after agitated, by masterbatch, polyolefin mix homogeneously, mixing obtain polyolefin/lamellar silicate composite nanomaterial.But the mechanical property of this material is not that its heat-resisting ageing-resisting performance is general in addition very well.
But; along with socioeconomic development and the progress of science and technology, the consciousness of people's environmental conservation is more and more higher, and the white pollution problems that plastic refuse is caused the most increasingly comes into one's own; therefore, the material with biodegradability becomes the needs of era development.Although but existing plastics can be degraded to fragment in the environment exposed well, but the rubbish in city trends towards landfill method, these waste particles being degraded into are embedded in rubbish or soil, then degradation effect is inconspicuous.
Summary of the invention
The technical problem to be solved be obtain that a kind of packaging is degradable, sturdy and durable, stable performance, the degradable modified poly ethylene plastics and preparation method thereof of heat-resisting water-tolerant.
For solving the problems referred to above, the technical solution used in the present invention is:
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weigh polyethylene
30-50 part, EVA (ethylene-vinyl acetate copolymer) 6-10 part, hydroxypropyl cellulose 8-12 part, glutaraldehyde 2-5 part, pulullan polysaccharide 3-6 part and change surname starch 10-15 part and join in the glycerine water solution that volume fraction is 15-25%, wherein glycerine water solution is 35-45 part;Being 60 DEG C-80 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.0-9.0, is added by pasty mixture in autoclave, at 1.2-2.
Reacting 60-90 minute under the conditions of 5MPa, 110-150 DEG C, reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene
50-70 part, polyvinyl alcohol 15-25 part, starch
15-25 part, cumyl peroxide 5-8 part, silane coupler 4-6 part, kemanide S 3-7 part and ethylene glycol 25-35 part, use plastics homogenizer, at rotating speed 600r/min-800r/min, stir 10-20 minute under conditions of temperature 15-30 DEG C, making it be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 200-300 DEG C, screw speed is 250-400r/min, obtains degradable modified poly ethylene plastics.
As preferably, in described step (1), by weight, weighing polyethylene 35-45 part, EVA (ethylene-vinyl acetate copolymer) 7-9 part, hydroxypropyl cellulose 9-11 part, glutaraldehyde 3-4 part, pulullan polysaccharide 4-5 part and change surname starch 12-14 part and join in the glycerine water solution that volume fraction is 18-22%, wherein glycerine water solution is 38-42 part;Being 65 DEG C-75 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.2-8.6, is added by pasty mixture in autoclave, at 1.5-2.0
Reacting 70-80 minute under the conditions of MPa, 120-140 DEG C, reaction can be prepared by modified poly ethylene after terminating.
In described step (2), by weight, weigh modified poly ethylene
55-65 part, polyvinyl alcohol 18-22 part, starch
18-22 part, cumyl peroxide 6-8 part, silane coupler 4-6 part, kemanide S 4-6 part and ethylene glycol 28-32 part, use plastics homogenizer, at rotating speed 650r/min-750r/min, stir 12-18 minute under conditions of temperature 18-25 DEG C, making it be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 220-260 DEG C, screw speed is 280-360r/min, obtains degradable modified poly ethylene plastics.
The preparation method of described modified starch is: carries out being sufficiently mixed, moistening by starch 60-85 weight portion, glycerol 15-25 weight portion and water 5-10 weight portion addition high-speed mixer, carries out modification in 10-30 minute and get final product.
Described silane coupler is γ-glycidoxypropyl trimethoxy siloxanes.
Vinyon prepared by the present invention possesses following beneficial effect as packaging material:
(1) fabulous transparency and glossiness, not dust suction, not static electrification, printing adaptability are good, higher hot strength and percentage elongation, good wearability, fabulous barrier properties for gases and fragrance protectiveness.
(2) use modified starch, EVA, hydroxypropyl cellulose, pulullan polysaccharide synergism that polyethylene is modified, greatly improve the degradability of polyethylene so that the vinyon of acquisition can be good at degraded, and the feature of environmental protection is good.
(3) using polyvinyl alcohol, starch, cumyl peroxide, polyethylene is acted on by silane coupler and kemanide S so that the performance of the vinyon of preparation is extremely stable, heat-resisting resistance to water energy consumption, tensile strength.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme is further elaborated:
Embodiment 1
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 40 parts, EVA (ethylene-vinyl acetate copolymer) 8 parts, hydroxypropyl cellulose 10 parts, glutaraldehyde 4 parts, pulullan polysaccharide 4 parts and change surname starch 12 parts and join in the glycerine water solution that volume fraction is 20%, wherein glycerine water solution is 40 parts;Being 70 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.5, is added by pasty mixture in autoclave, at 2.0MPa, reacts 80 minutes under the conditions of 120 DEG C, and reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 60 parts, polyvinyl alcohol 20 parts, starch 20 parts, cumyl peroxide 6 parts, γ-glycidoxypropyl trimethoxy siloxanes 5 parts, kemanide S 4 parts and ethylene glycol 30 parts, use plastics homogenizer, at rotating speed 700r/min, stir 15 minutes under conditions of temperature 25 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 250 DEG C, screw speed is 300r/min, obtain degradable modified poly ethylene plastics.
Embodiment 2
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 30 parts, EVA (ethylene-vinyl acetate copolymer) 6 parts, hydroxypropyl cellulose 8 parts, glutaraldehyde 2 parts, pulullan polysaccharide 3 parts and change surname starch 10 parts and join in the glycerine water solution that volume fraction is 15%, wherein glycerine water solution is 35 parts;Being 60 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.0, is added by pasty mixture in autoclave, at 1.2MPa, reacts 60 minutes under the conditions of 110 DEG C, and reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 50 parts, polyvinyl alcohol 15 parts, starch 15 parts, cumyl peroxide 5 parts, γ-glycidoxypropyl trimethoxy siloxanes 4 parts, kemanide S 3 parts and ethylene glycol 25 parts, use plastics homogenizer, at rotating speed 600r/min, stir 10 minutes under conditions of temperature 15 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 200 DEG C, screw speed is 250r/min, obtain degradable modified poly ethylene plastics.
Embodiment 3
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 50 parts, EVA (ethylene-vinyl acetate copolymer) 10 parts, hydroxypropyl cellulose 12 parts, glutaraldehyde 5 parts, pulullan polysaccharide 6 parts and change surname starch 15 parts and join in the glycerine water solution that volume fraction is 25%, wherein glycerine water solution is 45 parts;Being 80 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 9.0, is added by pasty mixture in autoclave, at 2. 5MPa, reacts 90 minutes under the conditions of 150 DEG C, and reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 70 parts, polyvinyl alcohol 25 parts, starch 25 parts, cumyl peroxide 8 parts, γ-glycidoxypropyl trimethoxy siloxanes 6 parts, kemanide S 7 parts and ethylene glycol 35 parts, use plastics homogenizer, at rotating speed 800r/min, stir 20 minutes under conditions of temperature 30 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 300 DEG C, screw speed is 400r/min, obtain degradable modified poly ethylene plastics.
Embodiment 4
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 35 parts, EVA (ethylene-vinyl acetate copolymer) 7 parts, hydroxypropyl cellulose 9 parts, glutaraldehyde 3 parts, pulullan polysaccharide 4 parts and change surname starch 12 parts and join in the glycerine water solution that volume fraction is 18%, wherein glycerine water solution is 38 parts;Being 67 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.3, is added by pasty mixture in autoclave, at 1.8MPa, reacts 70 minutes under the conditions of 120 DEG C, and reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 55 parts, polyvinyl alcohol 18 parts, starch 19 parts, cumyl peroxide 6 parts, γ-glycidoxypropyl trimethoxy siloxanes 5 parts, kemanide S 4 parts and ethylene glycol 28 parts, use plastics homogenizer, at rotating speed 680r/min, stir 13 minutes under conditions of temperature 20 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 230 DEG C, screw speed is 300r/min, obtain degradable modified poly ethylene plastics.
Embodiment 5
The preparation method of a kind of packaging degradable modified poly ethylene plastics, comprises the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 45 parts, EVA (ethylene-vinyl acetate copolymer) 9 parts, hydroxypropyl cellulose 10 parts, glutaraldehyde 4 parts, pulullan polysaccharide 5 parts and change surname starch 14 parts and join in the glycerine water solution that volume fraction is 18%, wherein glycerine water solution is 40 parts;Being 75 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.8, is added by pasty mixture in autoclave, at 2.0MPa, reacts 80 minutes under the conditions of 140 DEG C, and reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 65 parts, polyvinyl alcohol 22 parts, starch 22 parts, cumyl peroxide 7 parts, γ-glycidoxypropyl trimethoxy siloxanes 5 parts, kemanide S 6 parts and ethylene glycol 32 parts, use plastics homogenizer, at rotating speed 740r/min, stir 18 minutes under conditions of temperature 25 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 280 DEG C, screw speed is 360r/min, obtain degradable modified poly ethylene plastics.
The degradable modified poly ethylene plastics prepared by above-described embodiment 1-5 detect, detection temperature is 80 DEG C, wherein, the detection of degradation rate is to use composting process, the testing standard of bending strength is GB9341, the testing standard of hot strength is GB11040, and the testing standard of heat distortion temperature is GB1634.Concrete outcome is as shown in table 1:
Bending strength/MPa | Hot strength/MPa | Heat distortion temperature/DEG C | Resistance to water | 150 days degradation rate/% | |
Embodiment 1 | 210 | 192 | 189 | By force | 110 |
Embodiment 2 | 215 | 210 | 192 | By force | 112 |
Embodiment 3 | 218 | 205 | 183 | By force | 115 |
Embodiment 4 | 213 | 208 | 200 | By force | 108 |
Embodiment 5 | 220 | 214 | 205 | By force | 120 |
As can be seen from Table 1, the hot strength of degradable modified poly ethylene plastics prepared by the present invention may be up to 192-214MPa, bending strength is up to 210-220MPa, there is good mechanical performance, and its heat distortion temperature is up to 183-205 DEG C, there is excellent heat resistance, it addition, its resistance to water and degradability are the most excellent.
Above a kind of packaging degradable modified poly ethylene plastics that the invention enforcement is provided and preparation method thereof are described in detail, for one of ordinary skill in the art, thought according to the invention embodiment, the most all will change, in sum, this specification content should not be construed as the restriction to the invention.
Claims (6)
1. the preparation method of packaging degradable modified poly ethylene plastics, it is characterised in that comprise the following steps:
(1) preparation of modified poly ethylene: by weight, weighing polyethylene 30-50 part, EVA (ethylene-vinyl acetate copolymer) 6-10 part, hydroxypropyl cellulose 8-12 part, glutaraldehyde 2-5 part, pulullan polysaccharide 3-6 part and change surname starch 10-15 part and join in the glycerine water solution that volume fraction is 15-25%, wherein glycerine water solution is 35-45 part;Being 60 DEG C-80 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.0-9.0, is added by pasty mixture in autoclave, at 1.2-2.
Reacting 60-90 minute under the conditions of 5MPa, 110-150 DEG C, reaction can be prepared by modified poly ethylene after terminating;
(2) preparation of degradable modified poly ethylene plastics: by weight, weigh modified poly ethylene 50-70 part, polyvinyl alcohol 15-25 part, starch 15-25 part, cumyl peroxide 5-8 part, silane coupler 4-6 part, kemanide S 3-7 part and ethylene glycol 25-35 part, use plastics homogenizer, at rotating speed 600r/min-800r/min, stir 10-20 minute under conditions of temperature 15-30 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 200-300 DEG C, screw speed is 250-400r/min, obtain degradable modified poly ethylene plastics.
Method the most according to claim 1, it is characterized in that, in described step (1), by weight, weighing polyethylene 35-45 part, EVA (ethylene-vinyl acetate copolymer) 7-9 part, hydroxypropyl cellulose 9-11 part, glutaraldehyde 3-4 part, pulullan polysaccharide 4-5 part and change surname starch 12-14 part and join in the glycerine water solution that volume fraction is 18-22%, wherein glycerine water solution is 38-42 part;Being 65 DEG C-75 DEG C in temperature, pH is the prepared pasty state that stirs under conditions of 8.2-8.6, is added by pasty mixture in autoclave, at 1.5-2.0
Reacting 70-80 minute under the conditions of MPa, 120-140 DEG C, reaction can be prepared by modified poly ethylene after terminating.
Method the most according to claim 1, it is characterized in that, in described step (2), by weight, weigh modified poly ethylene 55-65 part, polyvinyl alcohol 18-22 part, starch 18-22 part, cumyl peroxide 6-8 part, silane coupler 4-6 part, kemanide S 4-6 part and ethylene glycol 28-32 part, use plastics homogenizer, at rotating speed 650r/min-750r/min, stir 12-18 minute under conditions of temperature 18-25 DEG C, it is made to be sufficiently mixed uniformly, mixing in double screw extruder afterwards, the preheating temperature in described double-screw extruder screw region is 220-260 DEG C, screw speed is 280-360r/min, obtain degradable modified poly ethylene plastics.
4. according to the method described in any one of claim 1-3, it is characterized in that, the preparation method of described modified starch is: carries out being sufficiently mixed, moistening by starch 60-85 weight portion, glycerol 15-25 weight portion and water 5-10 weight portion addition high-speed mixer, carries out modification in 10-30 minute and get final product.
5. according to the method described in any one of claim 1-3, it is characterised in that described silane coupler is γ-glycidoxypropyl trimethoxy siloxanes.
6. the packaging degradable modified poly ethylene plastics that method described in an any one of claim 1-5 prepares.
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Cited By (5)
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CN107857922A (en) * | 2017-10-19 | 2018-03-30 | 合肥朗胜新材料有限公司 | A kind of degradable polyethylene plastics and preparation method thereof |
CN107936440A (en) * | 2017-10-19 | 2018-04-20 | 合肥朗胜新材料有限公司 | A kind of environment-friendlyvinyl vinyl plastic and preparation method thereof |
CN110157077A (en) * | 2019-06-04 | 2019-08-23 | 亳州市亚洲包装材料有限公司 | A kind of degradable plastic packaging material and preparation method thereof |
CN112809988A (en) * | 2021-02-18 | 2021-05-18 | 魏朋朋 | Production equipment and preparation method of degradable polyethylene plastic |
CN115109334A (en) * | 2021-03-23 | 2022-09-27 | 镇江凯瑞塑胶五金有限公司 | Degradable PE preservative film and production process thereof |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107857922A (en) * | 2017-10-19 | 2018-03-30 | 合肥朗胜新材料有限公司 | A kind of degradable polyethylene plastics and preparation method thereof |
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CN115109334A (en) * | 2021-03-23 | 2022-09-27 | 镇江凯瑞塑胶五金有限公司 | Degradable PE preservative film and production process thereof |
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