CN107629351A - A kind of degradable plastic film and preparation method thereof - Google Patents
A kind of degradable plastic film and preparation method thereof Download PDFInfo
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- CN107629351A CN107629351A CN201710749709.5A CN201710749709A CN107629351A CN 107629351 A CN107629351 A CN 107629351A CN 201710749709 A CN201710749709 A CN 201710749709A CN 107629351 A CN107629351 A CN 107629351A
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Abstract
The invention provides a kind of degradable plastic film and preparation method thereof, it is related to film applications；It is made up of the raw material of following parts by weight：55 70 parts of polyvinyl chloride, 36 46 parts of PLA, 22 28 parts of polyvinyl acetate, 12 15 parts of straw, 7 10 parts of ionic compound, 11 14 parts of toughener, 14 20 parts of coupling agent, 13 16 parts of strength additive；Straw is with the addition of in raw material, on the one hand, the composition of straw can guarantee that film in the environment in microorganism by natural degradation, any additional conditions are not needed, especially when film is used for agriculture, waste film can be degraded quickly in soil, on the other hand, because straw is rich in substantial amounts of crude fibre, and contain lignin, ionic interaction in crude fibre and raw material mesoionic compound can make plastics i.e. degradable in any environment, it is not necessary to the specific condition such as microorganism, illumination, anaerobic, greatly increase film degradation possibility.
Description
Technical field
The present invention relates to film applications, and in particular to a kind of degradable plastic film and preparation method thereof.
Background technology
It is well known that polybag with plastic sheeting making is light, thin, waterproof, cost is low, it is a kind of good packing timber
Material, the use of polybag bring great convenience to the life of people, make the dosage of plastic tape increasing, but after using
Waste plastic bag be not easily recycled, particularly not degradable, substantial amounts of waste plastic bag turns into one of current contamination environment
The problem of serious.In order to mitigate pollution of the plastic sheeting to environment, people have developed some degradable plastic films in succession.
Current plastic degradation is broadly divided into light degradation, biodegradation, light/biodegradation and water degraded, although to plastics
Degraded play a role, but the additive of triggering degraded must be added when preparing plastics, and degrade need to be
Carried out under conditions of certain, if the environment that plastic sheeting is in does not reach the requirement of degradation condition, film is difficult to be degraded,
Therefore, there is the defects of certain in existing degraded mode.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of degradable plastic film and preparation method thereof so that modeling
Material film can be degraded in any discarded environment, and environment will not be caused seriously to pollute.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs：
A kind of degradable plastic film, it is made up of the raw material of following parts by weight：Polyvinyl chloride 55-70 parts, PLA 36-46
Part, polyvinyl acetate 22-28 parts, straw 12-15 parts, ionic compound 7-10 parts, toughener 11-14 parts, coupling agent 14-
20 parts, strength additive 13-16 parts.
Preferably, the straw be soybean stalk, it is maize straw, cotton stalk, wheat stalk, broomcorn straw, red
At least one of potato stalk, sunflower straw.
Preferably, the ionic compound be sodium chloride, potassium chloride, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate,
Its mass ratio is 3：2：1：1：2.
Preferably, the toughener is haloflex, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-benzene
One kind in ethylene copolymer, preferably haloflex.
Preferably, the coupling agent is chromium complex coupling agent.
Preferably, the strength additive be oxide, calcium carbonate, the mixture of burnt flaxen fiber, mass ratio 1-3:4-
8:1-2；The oxide is one or both of magnesia, silica, aluminum oxide combination of the above.
The preparation method of described degradable plastic film, comprises the following steps：(1) straw is crushed, prepared
The mass ratio of the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and straw is 1:20, immersion
After 12-15h, filtering, plant straw powder is cleaned, dried, places into the lime of 0.2% concentration and the secondary chlorine of 0.8% concentration
Soak 30-40h in sour sodium mixed solution, the mass ratio of mixed solution and straw is 1:35, filter, dry after immersion, make
Obtain plant straw powder；(2) plant straw powder prepared step (1) and polyvinyl chloride, PLA, polyvinyl acetate, increasing
Tough dose, coupling agent in homogenizer be well mixed, be added in twin-screw extruder barrel and heated at 240-280 DEG C,
Through head extrusion, extrusion temperature is 250-270 DEG C, and master batch is made；(3) master batch is mixed with ionic compound, strength additive,
It is added in film blowing machine barrel and is heated at 190-200 DEG C, through head extrusion at 200-210 DEG C, into die head, inflation is molded,
Blow-up ratio is 1.7-1.8, and roller is distracted under 20-30m/min hauling speed, and film is made.
(3) beneficial effect
The invention provides a kind of degradable plastic film and preparation method thereof, its advantage is：It with the addition of in raw material
Straw, on the one hand, the composition of straw can guarantee that film in the environment in microorganism by natural degradation, it is not necessary to
Any additional conditions, especially when film is used for agriculture, waste film can be degraded quickly in soil, on the other hand, due to
Straw is rich in substantial amounts of crude fibre, and contains lignin, the ion phase interaction in crude fibre and raw material mesoionic compound
With plastics can be made i.e. degradable in any environment, it is not necessary to the specific condition such as microorganism, illumination, anaerobic, make film degradation can
Energy property greatly increases, and the toughness of the toughener increase film in raw material, strength additive increases the use intensity of film, coupling agent
Various raw materials are crosslinked together, be advantageous to the machine-shaping of film.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Embodiment 1：
A kind of degradable plastic film, it is made up of the raw material of following parts by weight：55 parts of polyvinyl chloride, 42 parts of PLA, gather
24 parts of vinyl acetate, 14 parts of straw, 7 parts of ionic compound, 13 parts of toughener, 16 parts of coupling agent, 15 parts of strength additive.
The straw is soybean stalk, maize straw, the mixture of cotton stalk, mass ratio 1：1：1.
The ionic compound is sodium chloride, potassium chloride, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate, its mass ratio
For 3：2：1：1：2.
The toughener is haloflex.
The coupling agent is chromium complex coupling agent.
The strength additive is oxide, calcium carbonate, the mixture of burnt flaxen fiber, mass ratio 2:5:2；The oxidation
Thing is magnesia, the mixture of silica, mass ratio 2:1.
The preparation method of described degradable plastic film, comprises the following steps：(1) straw is crushed, prepared
The mass ratio of the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and straw is 1:20, immersion
After 15h, filtering, plant straw powder is cleaned, dried, places into the lime of 0.2% concentration and the sodium hypochlorite of 0.8% concentration
Soak 30h in mixed solution, the mass ratio of mixed solution and straw is 1:35, filter, dry after immersion, plant straw are made
Stalk powder；(2) plant straw powder prepared step (1) and polyvinyl chloride, PLA, polyvinyl acetate, toughener, coupling
Agent is well mixed in homogenizer, is added in twin-screw extruder barrel and is heated at 250 DEG C, through head extrusion, is squeezed
Go out temperature for 260 DEG C, master batch is made；(3) master batch is mixed with ionic compound, strength additive, is added to film blowing machine barrel
In heated at 200 DEG C, through head extrusion at 210 DEG C, into die head, inflation shaping, blow-up ratio 1.8, in leading for 20m/min
Draw and be distracted into roller under speed, film is made.
Embodiment 2：
A kind of degradable plastic film, it is made up of the raw material of following parts by weight：60 parts of polyvinyl chloride, 46 parts of PLA, gather
22 parts of vinyl acetate, 15 parts of straw, 8 parts of ionic compound, 14 parts of toughener, 18 parts of coupling agent, 16 parts of strength additive.
The straw is wheat stalk, broomcorn straw, the mixture of sweet potato stalk, mass ratio 3:1:2.
The ionic compound is sodium chloride, potassium chloride, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate, its mass ratio
For 3：2：1：1：2.
The toughener is acrylonitrile-butadiene-styrene copolymer.
The coupling agent is chromium complex coupling agent.
The strength additive is oxide, calcium carbonate, the mixture of burnt flaxen fiber, mass ratio 3:4:1；The oxidation
Thing is aluminum oxide.
The preparation method of described degradable plastic film, comprises the following steps：(1) straw is crushed, prepared
The mass ratio of the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and straw is 1:20, immersion
After 14h, filtering, plant straw powder is cleaned, dried, places into the lime of 0.2% concentration and the sodium hypochlorite of 0.8% concentration
Soak 32h in mixed solution, the mass ratio of mixed solution and straw is 1:35, filter, dry after immersion, plant straw are made
Stalk powder；(2) plant straw powder prepared step (1) and polyvinyl chloride, PLA, polyvinyl acetate, toughener, coupling
Agent is well mixed in homogenizer, is added in twin-screw extruder barrel and is heated at 260 DEG C, through head extrusion, is squeezed
Go out temperature for 250 DEG C, master batch is made；(3) master batch is mixed with ionic compound, strength additive, is added to film blowing machine barrel
In heated at 200 DEG C, through head extrusion at 210 DEG C, into die head, inflation shaping, blow-up ratio 1.8, in leading for 25m/min
Draw and be distracted into roller under speed, film is made.
Embodiment 3：
A kind of degradable plastic film, it is made up of the raw material of following parts by weight：65 parts of polyvinyl chloride, 36 parts of PLA, gather
28 parts of vinyl acetate, 13 parts of straw, 9 parts of ionic compound, 11 parts of toughener, 14 parts of coupling agent, 13 parts of strength additive.
The straw is soybean stalk, the mixture of sunflower straw, mass ratio 5:2.
The ionic compound is sodium chloride, potassium chloride, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate, its mass ratio
For 3：2：1：1：2.
The toughener is ethylene-vinyl acetate copolymer.
The coupling agent is chromium complex coupling agent.
The strength additive is oxide, calcium carbonate, the mixture of burnt flaxen fiber, mass ratio 2:7:1；The oxidation
Thing is magnesia, the mixture of aluminum oxide, mass ratio 2:3.
The preparation method of described degradable plastic film, comprises the following steps：(1) straw is crushed, prepared
The mass ratio of the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and straw is 1:20, immersion
After 13h, filtering, plant straw powder is cleaned, dried, places into the lime of 0.2% concentration and the sodium hypochlorite of 0.8% concentration
Soak 36h in mixed solution, the mass ratio of mixed solution and straw is 1:35, filter, dry after immersion, plant straw are made
Stalk powder；(2) plant straw powder prepared step (1) and polyvinyl chloride, PLA, polyvinyl acetate, toughener, coupling
Agent is well mixed in homogenizer, is added in twin-screw extruder barrel and is heated at 280 DEG C, through head extrusion, is squeezed
Go out temperature for 270 DEG C, master batch is made；(3) master batch is mixed with ionic compound, strength additive, is added to film blowing machine barrel
In heated at 190 DEG C, through head extrusion at 200 DEG C, into die head, inflation shaping, blow-up ratio 1.7, in leading for 30m/min
Draw and be distracted into roller under speed, film is made.
Embodiment 4：
A kind of degradable plastic film, it is made up of the raw material of following parts by weight：70 parts of polyvinyl chloride, 39 parts of PLA, gather
26 parts of vinyl acetate, 12 parts of straw, 10 parts of ionic compound, 12 parts of toughener, 20 parts of coupling agent, strength additive 14
Part.
The straw is cotton stalk.
The ionic compound is sodium chloride, potassium chloride, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate, its mass ratio
For 3：2：1：1：2.
The toughener is haloflex.
The coupling agent is chromium complex coupling agent.
The strength additive is oxide, calcium carbonate, the mixture of burnt flaxen fiber, mass ratio 1:8:2；The oxidation
Thing is magnesia, silica, the mixture of aluminum oxide, mass ratio 1:1:3.
The preparation method of described degradable plastic film, comprises the following steps：(1) straw is crushed, prepared
The mass ratio of the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and straw is 1:20, immersion
After 12h, filtering, plant straw powder is cleaned, dried, places into the lime of 0.2% concentration and the sodium hypochlorite of 0.8% concentration
Soak 40h in mixed solution, the mass ratio of mixed solution and straw is 1:35, filter, dry after immersion, plant straw are made
Stalk powder；(2) plant straw powder prepared step (1) and polyvinyl chloride, PLA, polyvinyl acetate, toughener, coupling
Agent is well mixed in homogenizer, is added in twin-screw extruder barrel and is heated at 240 DEG C, through head extrusion, is squeezed
Go out temperature for 265 DEG C, master batch is made；(3) master batch is mixed with ionic compound, strength additive, is added to film blowing machine barrel
In heated at 190 DEG C, through head extrusion at 200 DEG C, into die head, inflation shaping, blow-up ratio 1.7, in leading for 25m/min
Draw and be distracted into roller under speed, film is made.
Degradable films prepared by embodiment 1-4 are carried out with the detection of degradation rate, and existing commercially available PLA PLAs are dropped
Solve mulch film as a control group, carry out same performance detection, it is as a result as follows：
| 20d | 40d | 60d | 90d | 120d | 150d | |
| Embodiment 1 | 34.6% | 51.2% | 72.3% | 83.6% | 92.1% | 99.9% |
| Embodiment 2 | 34.8% | 51.3% | 72.3% | 83.7% | 92.3% | 99.8% |
| Embodiment 3 | 34.8% | 51.3% | 72.3% | 83.6% | 92.4% | 99.8% |
| Embodiment 4 | 34.7% | 51.2% | 72.3% | 83.7% | 92.2% | 99.9% |
| Control group | 16.3% | 21.2% | 31.8% | 36.5% | 37.6% | 42.1% |
From above table, degradable plastic film prepared by the present invention has higher degradation rate, the base after 150d
This whole is degraded, and greatly shortens degradation cycle, and environment is kept with prominent contribution.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a kind of degradable plastic film, it is characterised in that be made up of the raw material of following parts by weight：Polyvinyl chloride 55-70 parts, gather
Lactic acid 36-46 parts, polyvinyl acetate 22-28 parts, straw 12-15 parts, ionic compound 7-10 parts, toughener 11-14 parts,
Coupling agent 14-20 parts, strength additive 13-16 parts.
2. degradable plastic film as claimed in claim 1, it is characterised in that the straw is soybean stalk, corn
At least one of stalk, cotton stalk, wheat stalk, broomcorn straw, sweet potato stalk, sunflower straw.
3. degradable plastic film as claimed in claim 1, it is characterised in that the ionic compound is sodium chloride, chlorination
Potassium, dibastic sodium phosphate, magnesium nitrate, the mixture of calcium acetate, its mass ratio are 3：2：1：1：2.
4. degradable plastic film as claimed in claim 1, it is characterised in that the toughener be haloflex, ethene-
One kind in vinyl acetate co-polymer, acrylonitrile-butadiene-styrene copolymer, preferably haloflex.
5. degradable plastic film as claimed in claim 1, it is characterised in that the coupling agent is chromium complex coupling agent.
6. degradable plastic film as claimed in claim 1, it is characterised in that the strength additive is oxide, carbonic acid
The mixture of calcium, burnt flaxen fiber, mass ratio 1-3:4-8:1-2；The oxide is in magnesia, silica, aluminum oxide
One or more kinds of combinations.
7. the preparation method of the degradable plastic film as described in claim any one of 1-6, it is characterised in that including following step
Suddenly：(1) straw is crushed, prepares the sodium hydroxide solution immersion straw of 8.5% concentration, sodium hydroxide solution and plant
The mass ratio of thing stalk is 1:20, after soaking 12-15h, filtering, plant straw powder is cleaned, dried, it is dense to place into 0.2%
30-40h, mixed solution and straw mass ratio are soaked in the lime of degree and the sodium hypochlorite mixed solution of 0.8% concentration
For 1:35, filter, dry after immersion, plant straw powder is made；(2) plant straw powder and polychlorostyrene for preparing step (1)
Ethene, PLA, polyvinyl acetate, toughener, coupling agent are well mixed in homogenizer, are added to double screw extruder
Heated in barrel at 240-280 DEG C, through head extrusion, extrusion temperature is 250-270 DEG C, and master batch is made；(3) by master batch with from
Sub- compound, strength additive mixing, are added in film blowing machine barrel and are heated at 190-200 DEG C, through head at 200-210 DEG C
Extrusion, into die head, inflation shaping, blow-up ratio 1.7-1.8, roller is distracted under 20-30m/min hauling speed, be made
Film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710749709.5A CN107629351A (en) | 2017-08-28 | 2017-08-28 | A kind of degradable plastic film and preparation method thereof |
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| CN201710749709.5A CN107629351A (en) | 2017-08-28 | 2017-08-28 | A kind of degradable plastic film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851947A (en) * | 2019-01-09 | 2019-06-07 | 青岛海湾化学有限公司 | A kind of PVC3D printed material and preparation method thereof of macromolecule plasticising |
| CN111253662A (en) * | 2020-03-09 | 2020-06-09 | 福建省睿星纺织科技有限公司 | Multilayer heat-preservation environment-friendly film and preparation method thereof |
-
2017
- 2017-08-28 CN CN201710749709.5A patent/CN107629351A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851947A (en) * | 2019-01-09 | 2019-06-07 | 青岛海湾化学有限公司 | A kind of PVC3D printed material and preparation method thereof of macromolecule plasticising |
| CN111253662A (en) * | 2020-03-09 | 2020-06-09 | 福建省睿星纺织科技有限公司 | Multilayer heat-preservation environment-friendly film and preparation method thereof |
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Application publication date: 20180126 |