CN105542423B - A kind of Biodegradable mulch and preparation method thereof - Google Patents
A kind of Biodegradable mulch and preparation method thereof Download PDFInfo
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- CN105542423B CN105542423B CN201610040500.7A CN201610040500A CN105542423B CN 105542423 B CN105542423 B CN 105542423B CN 201610040500 A CN201610040500 A CN 201610040500A CN 105542423 B CN105542423 B CN 105542423B
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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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
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Abstract
The invention belongs to field of membrane material more particularly to a kind of Biodegradable mulch and preparation method thereof.Biodegradable mulch provided by the invention is made of the raw material for including following parts by weight of component：30~80 parts of carbon dioxide epoxy propane copolymer；18~68 parts of poly- (tetramethylene adipate mutual-phenenyl two acid bromide two alcohol ester)；0.2~0.5 part of chain extender；0.1~0.5 part of antioxidant；0.4~1 part of ultraviolet absorber；0.5~1.5 part of light stabilizer.The present invention is using carbon dioxide epoxy propane copolymer, poly- (tetramethylene adipate mutual-phenenyl two acid bromide two alcohol ester), chain extender, antioxidant, ultraviolet absorber and light stabilizer as raw material, pass through the synergistic effect between each raw material, on the premise of mulch made of guarantee has excellent biodegradable, the service life of mulch is extended.
Description
Technical field
The invention belongs to field of membrane material more particularly to a kind of Biodegradable mulch and preparation method thereof.
Background technology
Mulch plays an important role of heat preservation, moisturizing, soil moisture conservation, getting fat, can greatly improve crop yield, therefore receives pass
Note.Mulch extensive use at present, the annual agricultural film usage amount in China is about 1,600,000 tons, but traditional mulch is all not
Prepared by biodegradable plastics, non-biodegradation film is non-degradable in the soil, and difficult recycling.
A research report announced is shown within 2008, and in the cotton field of Xinjiang region, mulch residual quantity is averaged per hectare 265.3
Kilogram, and as the overlay film time limit is longer, pollution is more serious.In Xinjiang, the continuous overlay film cotton field of 10 years, 15 years and 20 years, ground
Film residual quantity is respectively 262 kilograms/hectare, 350 kilograms/hectare, 430 kilograms/hectare, and most serious pollution field agricultural mulching is residual
Allowance is up to 597 kilograms/hectare.Substantial amounts of mulch residual, will influence China's ability of agricultural sustainable development, and very likely right
Environment, water and soil damage, and generate more serious negative effect.Therefore, Biodegradable high molecular film is utilized in mulch field
The traditional polyolefin film materials of material substitution are imperative.
Biodegradable mulch is quickly grown in recent years, is disclosed in the Chinese patent of Application No. 201310736299.2
A kind of poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester) whole life cycle design, the mulch is with poly- (adipic acid fourth two
Alcohol ester-mutual-phenenyl two acid bromide two alcohol ester), modified talc powder, antioxidant, ultraviolet absorber, light stabilizer, caking inhibiter, lubrication
Agent and dispersant are made of conventional filming technology as raw material, have preferable Kekelé structure count.But the mulch exists when in use
The problem of degradation speed is fast, will be degraded using in 75 days, it is difficult to meet the requirement of long growth cycle crops.
The content of the invention
In view of this, it is an object of the invention to provide a kind of Biodegradable mulch and preparation method thereof, the present invention provides
Mulch there is longer service life, and can be degradable rapidly after service life.
The present invention provides a kind of Biodegradable mulch, are made of the raw material for including following parts by weight of component：
Preferably, the carbon dioxide-epoxy propane copolymer is under 190 DEG C of test temperatures and 2.16kg testing loads
Melt index is 0.5~1g/10min.
Preferably, poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester) in 190 DEG C of test temperatures and
Melt index under 2.16kg testing loads is 2~4g/10min.
Preferably, the chain extender is epoxy chain extenders.
Preferably, the model of the epoxy chain extenders include 4300,4370,4368,9302,9320, YTPA-801,
One or more in YTPA-803, YTPA-511 and KL-E4370.
Preferably, the antioxidant is included in antioxidant 1135, antioxidant 1010, antioxidant 626 and antioxidant 1098
It is one or more.
Preferably, the ultraviolet absorber includes ultraviolet absorber 571, ultraviolet absorber 765,531 and of ultraviolet absorber
One or more in ultraviolet absorber 234.
Preferably, the light stabilizer includes light stabilizer 944, light stabilizer 622, light stabilizer 770 and light stabilizer
One or more in 2020.
Preferably, in terms of parts by weight, the raw material includes：
The present invention provides a kind of preparation methods of Biodegradable mulch, comprise the following steps：
Raw material by melt blending, granulation and blow molding, obtains Biodegradable mulch successively；
The raw material include 30~80 parts by weight carbon dioxide-epoxy propane copolymers, 18~68 parts by weight poly- (oneself two
Sour butanediol ester-mutual-phenenyl two acid bromide two alcohol ester), the chain extender of 0.2~0.5 parts by weight, 0.1~0.5 parts by weight antioxidant,
The light stabilizer of the ultraviolet absorber of 0.4~1 parts by weight and 0.5~1.5 parts by weight.
Compared with prior art, the present invention provides a kind of Biodegradable mulch and preparation method thereof.It is provided by the invention
Biodegradable mulch is made of the raw material for including following parts by weight of component：30~80 parts of carbon dioxide-epoxy propane copolymer；
18~68 parts of poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester)；0.2~0.5 part of chain extender；Antioxidant 0.1~0.5
Part；0.4~1 part of ultraviolet absorber；0.5~1.5 part of light stabilizer.The present invention is with carbon dioxide-epoxy propane copolymer, poly-
(tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester), chain extender, antioxidant, ultraviolet absorber and light stabilizer are as former
Material by the synergistic effect between each raw material, on the premise of mulch made of guarantee has excellent biodegradable, extends
The service life of mulch.The experimental results showed that Biodegradable mulch service life provided by the invention is up to 90~120 days, it can
Meet requirement of the crops of growth cycle length to mulch, and this Biodegradable mulch can be rapid after more than usage time
It is degradable.
Specific embodiment
The technical solution in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiments obtained without making creative work belong to the model that the present invention protects
It encloses.
The present invention provides a kind of Biodegradable mulch, are made of the raw material for including following parts by weight of component：
Biodegradable mulch provided by the invention is made of raw material, and the raw material is copolymerized including carbon dioxide-epoxy propane
Object, poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester), chain extender, antioxidant, ultraviolet absorber and light stabilizer.
Wherein, the carbon dioxide-epoxy propane copolymer is the chief component of mulch provided by the invention, and in mulch
Other components, which act synergistically, can be obviously prolonged the service life of mulch.In one embodiment provided by the invention, described two
Melt index of the carbonoxide-epoxy propane copolymer under 190 DEG C of test temperatures and 2.16kg testing loads is 0.5~1g/
10min.In the present invention, content of the carbon dioxide-epoxy propane copolymer in the raw material is 30~80 parts by weight；
In one embodiment provided by the invention, content of the carbon dioxide-epoxy propane copolymer in the raw material is 50
~79.7 parts by weight.
In the present invention, the English name of poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester)：Poly
(butyleneadipate-co-terephthalate), abbreviation is referred to as PBAT, the poly- (tetramethylene adipate-to benzene
Dioctyl phthalate butanediol ester) be mulch provided by the invention chief component, in mulch other components act synergistically
The service life of mulch can be obviously prolonged.In one embodiment provided by the invention, it is described it is poly- (tetramethylene adipate-
Mutual-phenenyl two acid bromide two alcohol ester) melt index under 190 DEG C of test temperatures and 2.16kg testing loads is 2~4g/10min.
In the present invention, the content of poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester) in the raw material for 18~
68 parts by weight；In one embodiment provided by the invention, poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester)
Content in the raw material is 48~50 parts by weight.
In the present invention, content of the chain extender in the raw material is 0.2~0.5 parts by weight.It is provided in the present invention
One embodiment in, the chain extender be epoxy chain extenders.In one embodiment provided by the invention, the epoxy chain extension
The model of agent is including in 4300,4370,4368,9302,9320, YTPA-801, YTPA-803, YTPA-511 and KL-E4370
It is one or more.In one embodiment provided by the invention, the epoxy chain extenders of model 4300 and 4370 are by BASF stock
Part company provides, and the epoxy chain extenders of model 9302 and 9320 are provided by De Yi Science and Technology Co., Ltd., model YTPA-
801st, the epoxy chain extenders of YTPA-803 and YTPA-511 are provided by Guangzhou Yuan Tai synthetic materials Co., Ltd, model KL-
The epoxy chain extenders of E4370 are provided by chemical research institute of Shanxi Province.
In the present invention, content of the antioxidant in the raw material is 0.1~0.5 parts by weight；It is provided in the present invention
One embodiment in, content of the antioxidant in the raw material be 0.3~0.4 parts by weight.Provided by the invention one
In a embodiment, the antioxidant includes one kind in antioxidant 1135, antioxidant 1010, antioxidant 626 and antioxidant 1098
It is or a variety of.
In the present invention, content of the ultraviolet absorber in the raw material is 0.4~1 parts by weight；It is carried in the present invention
In one embodiment of confession, content of the ultraviolet absorber in the raw material is 0.6~0.7 parts by weight.It is carried in the present invention
In one embodiment of confession, the ultraviolet absorber includes ultraviolet absorber 571, ultraviolet absorber 765, ultraviolet absorber 531
With the one or more in ultraviolet absorber 234.Include ultraviolet absorber in a ultraviolet absorber provided by the invention
571 and ultraviolet absorber 765 embodiment in, the mass ratio of the ultraviolet absorber 571 and ultraviolet absorber 765 is preferred
(0.5~2)：1, more preferably 1:1.Include ultraviolet absorber 571 and purple in a ultraviolet absorber provided by the invention
In the embodiment of outer absorbent 234, the mass ratio of the ultraviolet absorber 571 and ultraviolet absorber 234 is preferably (0.5~2)：
1, more preferably 1:1.Include ultraviolet absorber 531 and ultraviolet absorber in a ultraviolet absorber provided by the invention
In 234 embodiment, the mass ratio of the ultraviolet absorber 531 and ultraviolet absorber 234 is preferably (0.5~2)：1, more preferably
For 1:1.
In the present invention, content of the light stabilizer in the raw material is 0.5~1.5 parts by weight；It is carried in the present invention
In one embodiment of confession, content of the light stabilizer in the raw material is 0.6~0.9 parts by weight.It is provided in the present invention
One embodiment in, the light stabilizer include light stabilizer 944, light stabilizer 622, light stabilizer 770 and light stabilizer
One or more in 2020.Include light stabilizer 944, light stabilizer 622 in a light stabilizer provided by the invention
In the embodiment of light stabilizer 770, the mass ratio of the light stabilizer 944, light stabilizer 622 and light stabilizer 770 is preferred
For (0.5~2)：(0.5~2)：1, more preferably 1:1:1.Stablize in a light stabilizer provided by the invention including light
In the embodiment of agent 944 and light stabilizer 770, the mass ratio of the light stabilizer 944 and light stabilizer 770 is preferably 1：(1~
3), it is more preferably 1:2.Include light stabilizer 944 and light stabilizer 2020 in a light stabilizer provided by the invention
In embodiment, the mass ratio of the light stabilizer 944 and light stabilizer 2020 is preferably (1~3)：1, more preferably 2:1.At this
The light stabilizer that invention provides is included in the embodiment of light stabilizer 770 and light stabilizer 2020, and the light is stablized
The mass ratio of agent 770 and light stabilizer 2020 is preferably (1~3)：1, more preferably 2:1.
In one embodiment provided by the invention, in terms of parts by weight, the raw material includes：
In one embodiment provided by the invention, the thickness of the Biodegradable mulch is 8~12 μm.
The present invention is with carbon dioxide-epoxy propane copolymer, poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol
Ester), chain extender, antioxidant, ultraviolet absorber and light stabilizer as raw material, by the synergistic effect between each raw material, ensureing
On the premise of manufactured mulch has excellent biodegradable, the service life of mulch is extended.The experimental results showed that：This
The tensile strength of the Biodegradable mulch thickness provided is invented as 19~22MPa, elongation at break is 500%~680%；Old
After changing experiment 11 days, stretching strength retentivity and elongation at break conservation rate are still above 50%, after senile experiment 12 days, stretch
Strength retention is more than 25%, and elongation at break conservation rate is more than 10%；The Biodegradable mulch service life is up to 90-120
My god, requirement of the crops of growth cycle length to mulch, and this Biodegradable mulch energy after more than usage time can be met
It is enough rapid degradable.
The present invention provides a kind of preparation methods of Biodegradable mulch, comprise the following steps：
Raw material by melt blending, granulation and blow molding, obtains Biodegradable mulch successively；
The raw material include 30~80 parts by weight carbon dioxide-epoxy propane copolymers, 18~68 parts by weight poly- (oneself two
Sour butanediol ester-mutual-phenenyl two acid bromide two alcohol ester), the chain extender of 0.2~0.5 parts by weight, 0.1~0.5 parts by weight antioxidant,
The light stabilizer of the ultraviolet absorber of 0.4~1 parts by weight and 0.5~1.5 parts by weight.
In preparation method provided by the invention, raw material carries out melt blending and granulation first, and the raw material includes dioxy
Change carbon-epoxy propane copolymer, poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester), chain extender, antioxidant, ultraviolet
Absorbent and light stabilizer.In the present invention, content of the carbon dioxide-epoxy propane copolymer in the raw material is 30
~80 parts by weight are preferably 50~79.7 parts by weight；The carbon dioxide-epoxy propane copolymer in 190 DEG C of test temperatures and
Melt index under 2.16kg testing loads is preferably 0.5~1g/10min.In the present invention, poly- (the adipic acid butanediol
Ester-mutual-phenenyl two acid bromide two alcohol ester) content in the raw material is 18~68 parts by weight, it is preferably 48~50 parts by weight；Institute
It is molten under 190 DEG C of test temperatures and 2.16kg testing loads to state poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester)
It is preferably 2~4g/10min to melt index.In the present invention, content of the chain extender in the raw material is 0.2~0.5 weight
Part；The chain extender is preferably epoxy chain extenders；The model of the epoxy chain extenders preferably includes 4300,4370,4368,
9302nd, 9320, the one or more in YTPA-801, YTPA-803, YTPA-511 and KL-E4370.In the present invention, it is described
Content of the antioxidant in the raw material is 0.1~0.5 parts by weight, is preferably 0.3~0.4 parts by weight；The antioxidant is preferred
Including the one or more in antioxidant 1135, antioxidant 1010, antioxidant 626 and antioxidant 1098.In the present invention, it is described
Content of the ultraviolet absorber in the raw material is 0.4~1 parts by weight, is preferably 0.6~0.7 parts by weight；The UV absorption
Agent preferably include ultraviolet absorber 571, ultraviolet absorber 765, ultraviolet absorber 531 and one kind in ultraviolet absorber 234 or
It is a variety of.In the present invention, content of the light stabilizer in the raw material is 0.5~1.5 parts by weight, is preferably 0.6~0.9
Parts by weight；The light stabilizer preferably includes light stabilizer 944, light stabilizer 622, light stabilizer 770 and light stabilizer 2020
In one or more.In the present invention, the temperature of the raw material melt blending is preferably 140~200 DEG C.In the present invention,
The raw material carries out melt blending and granulation preferably in dual-screw pelletizer well known to those skilled in the art.It is carried in the present invention
It in one embodiment of confession, is blended in granulation process, the temperature in one area of dual-screw pelletizer is 140 DEG C, the temperature in 2nd area
For 165 ± 5 DEG C, the temperature in 3rd area is 180 ± 5 DEG C, and the temperature in 4th area is 190 ± 5 DEG C, and the temperature in 5th area is 195 ± 5 DEG C, six
The temperature in area is 195 ± 5 DEG C, and the temperature in 7th area is 190 ± 5 DEG C, and the temperature of die head is 170 DEG C.Raw material complete melt blending and
After granulation, plastic grain is obtained.
After obtaining plastic grain, by the plastic grain blow molding.Wherein, the temperature of the blow molding is preferably
150 DEG C~170 DEG C.The present invention to the plastic grain blow molding used by device be not particularly limited, be preferably ability
Inflation film manufacturing machine known to field technique personnel.In one embodiment provided by the invention, in blow-moulding process, the inflation film manufacturing machine one
Area is 160 DEG C, and two area's temperature are 165 ± 5 DEG C, and three area's temperature are 165 ± 5 DEG C, and die head temperature is 170 DEG C.Plastic grain is blow molded
After shaping, Biodegradable mulch is obtained.
The higher Biodegradable mulch of service life can be made using method provided by the invention.The experimental results showed that：
Using Biodegradable mulch service life made from method provided by the invention up to 90-120 days, growth cycle length can be met
Requirement of the crops to mulch, and this Biodegradable mulch can be degradable rapidly after more than usage time.
For the sake of becoming apparent from, it is described in detail below by following embodiment.
Raw material used is commercially available in following embodiment：Carbon dioxide-epoxy propane copolymer used is by Zhe Jiangtai
The purchase of Zhou Bangfeng plastics Co., Ltd obtains；Poly- (tetramethylene adipate-mutual-phenenyl two acid bromide two alcohol ester) used is by prosperous rich medicine
Industry limited company and the purchase of Tun He chemical inc obtain；Antioxidant used, ultraviolet absorber and light stabilizer
It is bought and obtained by BASF AG；Chain extender used respectively by BASF AG, Guangzhou Yuan Tai Co., Ltds, De Yi companies and
The purchase of chemical research institute of Shanxi Province obtains.
Embodiment 1
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 48 parts by weight is 3.5g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 50 parts by weight is 0.5g/10min
1135th, 0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber 765,0.3 parts by weight light stabilizer 944,0.3 weight
The BASF epoxy chain extenders 4370 of part light stabilizer 622,0.3 parts by weight light stabilizer 770 and 0.2 parts by weight are measured in mixer
In be uniformly mixed, then will obtained mixture add in dual-screw pelletizer in be granulated, obtain plastic grain；The granulation
The temperature in one area of dual-screw pelletizer is 140 DEG C in the process, and the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 180 DEG C, 4th area
Temperature for 190 DEG C, the temperature in 5th area is 195 DEG C, and the temperature in 6th area is 195 DEG C, and the temperature in 7th area is 190 DEG C, the temperature of die head
It spends for 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 160 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
10 microns of Biodegradable mulch.
Embodiment 2
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 68 parts by weight is 3.0g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 30 parts by weight is 0.5g/10min
1135th, 0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber 765,0.3 parts by weight light stabilizer 944,0.3 weight
The BASF epoxy chain extenders 4370 of part light stabilizer 622,0.3 parts by weight light stabilizer 770 and 0.2 parts by weight are measured in mixer
In be uniformly mixed, then will obtained mixture add in dual-screw pelletizer in be granulated, obtain plastic grain；The granulation
The temperature in one area of dual-screw pelletizer is 140 DEG C in the process, and the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 185 DEG C, 4th area
Temperature for 195 DEG C, the temperature in 5th area is 195 DEG C, and the temperature in 6th area is 200 DEG C, and the temperature in 7th area is 190 DEG C, the temperature of die head
It spends for 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 165 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
10 microns of Biodegradable mulch.
Embodiment 3
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 18 parts by weight is 3.0g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 79.7 parts by weight is 0.5g/10min
1010th, 0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber 234,0.3 parts by weight light stabilizer 944,0.6 weight
The Guangzhou source Thailand epoxy chain extenders YTPA-801 for measuring part light stabilizer 770 and 0.5 parts by weight is uniformly mixed in mixer, then
Obtained mixture is added in dual-screw pelletizer and is granulated, obtains plastic grain；Twin-screw is made in the granulation process
The temperature in mono- areas of Li Ji is 140 DEG C, and the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 185 DEG C, and the temperature in 4th area is 195 DEG C,
The temperature in 5th area is 195 DEG C, and the temperature in 6th area is 200 DEG C, and the temperature in 7th area is 190 DEG C, and the temperature of die head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 165 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, obtains thickness as 8
The Biodegradable mulch of micron.
Embodiment 4
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 48 parts by weight is 3.5g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 50 parts by weight is 0.5g/10min
1010th, 0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber 234,0.4 parts by weight light stabilizer 944,0.2 weight
The De Yi companies epoxy chain extenders 9302 for measuring part light stabilizer 2020 and 0.5 parts by weight are uniformly mixed in mixer, then will
Obtained mixture is added in dual-screw pelletizer and is granulated, and obtains plastic grain；Twin-screw is granulated in the granulation process
The temperature in one area of machine is 140 DEG C, and the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 185 DEG C, and the temperature in 4th area is 195 DEG C, five
The temperature in area is 195 DEG C, and the temperature in 6th area is 200 DEG C, and the temperature in 7th area is 190 DEG C, and the temperature of die head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 165 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, obtains thickness as 8
The Biodegradable mulch of micron.
Embodiment 5
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 48 parts by weight is 4g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 50 parts by weight is 1g/10min
1135,0.3 parts by weight ultraviolet absorbers 531,0.3 parts by weight ultraviolet absorber 234,0.4 parts by weight light stabilizer 770,0.2 weight
The BASF AG's epoxy chain extenders 4368 for measuring part light stabilizer 2020 and 0.5 parts by weight are uniformly mixed in mixer, then
Obtained mixture is added in dual-screw pelletizer and is granulated, obtains plastic grain；Twin-screw is made in the granulation process
The temperature in mono- areas of Li Ji is 140 DEG C, and the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 185 DEG C, and the temperature in 4th area is 195 DEG C,
The temperature in 5th area is 195 DEG C, and the temperature in 6th area is 200 DEG C, and the temperature in 7th area is 190 DEG C, and the temperature of die head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 165 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
12 microns of Biodegradable mulch.
Comparative example 1
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 98 parts by weight is 3.5g/10min
Ester), 0.3 parts by weight antioxidant, 1135,0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber, 765,0.3 weight
The BASF ring of 944,0.3 parts by weight light stabilizer 622 of part light stabilizer, 0.3 parts by weight light stabilizer 770 and 0.2 parts by weight
Oxygen chain extender 4370 is uniformly mixed in mixer, is then added in dual-screw pelletizer obtained mixture and is granulated,
Obtain plastic grain；The temperature in one area of dual-screw pelletizer is 140 DEG C in the granulation process, and the temperature in 2nd area is 165 DEG C, three
The temperature in area is 180 DEG C, and the temperature in 4th area is 190 DEG C, and the temperature in 5th area is 195 DEG C, and the temperature in 6th area is 195 DEG C, 7th area
Temperature is 190 DEG C, and the temperature of die head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 160 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
10 microns of Biodegradable mulch.
Comparative example 2
By the poly- (tetramethylene adipate-terephthalic acid (TPA) butanediol that the melt index of 68 parts by weight is 3.5g/10min
Ester), carbon dioxide-epoxy propane copolymer, the 0.3 parts by weight antioxidant that the melt index of 30.2 parts by weight is 0.5g/10min
1135th, 0.3 parts by weight ultraviolet absorber 571,0.3 parts by weight ultraviolet absorber 765,0.3 parts by weight light stabilizer 944,0.3 weight
It measures part light stabilizer 622,0.3 parts by weight light stabilizer 770 to be uniformly mixed in mixer, then adds in obtained mixture
It is granulated in dual-screw pelletizer, obtains plastic grain；The temperature in one area of dual-screw pelletizer is 140 in the granulation process
DEG C, the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 180 DEG C, and the temperature in 4th area is 190 DEG C, and the temperature in 5th area is 195 DEG C, six
The temperature in area is 195 DEG C, and the temperature in 7th area is 190 DEG C, and the temperature of die head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 160 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
10 microns of Biodegradable mulch.
Comparative example 3
According to the whole life cycle design that high humid and warm environment is suitble to use disclosed in Chinese patent CN201410537357.3
And preparation method thereof in embodiment 10 prepare Biodegradable mulch, according to 1040.3 stretched plastic film performance tests of GB/T
Method standard tests obtained Biodegradable mulch, obtains the results are shown in Table 1.
7A open airs analogy method according to ASTM G155-05 standards tests obtained Biodegradable mulch, accelerates
Test ground film dynamic performance obtains the results are shown in Table 1 after aging.
Comparative example 4
It is that the carbon dioxide-epoxy propane copolymer of 0.5g/10min, 0.3 parts by weight resist by the melt index of 98 parts by weight
1135,0.3 parts by weight ultraviolet absorber 571 of oxygen agent, 0.3 parts by weight ultraviolet absorber 765,0.3 parts by weight light stabilizer 944,
The BASF epoxy chain extenders 4370 of 0.3 parts by weight light stabilizer 622,0.3 parts by weight light stabilizer 770 and 0.2 parts by weight exist
It is uniformly mixed in mixer, then obtained mixture is added in dual-screw pelletizer and is granulated, obtains plastic grain；Institute
The temperature in one area of dual-screw pelletizer in granulation process is stated as 140 DEG C, the temperature in 2nd area is 165 DEG C, and the temperature in 3rd area is 180
DEG C, the temperature in 4th area is 190 DEG C, and the temperature in 5th area is 195 DEG C, and the temperature in 6th area is 195 DEG C, and the temperature in 7th area is 190 DEG C, mould
The temperature of head is 170 DEG C.
After obtaining plastic grain, the plastic grain is subjected to blow molding, blown film in common prepare on ground film device
One area of machine temperature is 160 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 165 DEG C, and die head temperature is 170 DEG C, and obtaining thickness is
10 microns of Biodegradable mulch.
Embodiment 6
The present embodiment be intended to Examples 1 to 5 and comparative example 1~4 preparation Biodegradable mulch anti ageing property into
Row evaluation, detailed process are as follows：
By outdoor field, two methods of laying plastic and laboratory xenon lamp accelerated ageing detect the anti-old of mulch on the spot
Change performance.The outdoor experiment of laying plastic on the spot is carried out in Jilin Province Qianan County.Laboratory xenon lamp accelerated aging tests use
The Ci3000+ xenon lamp aging instrument of ATILAS companies, the 7A open airs analogy method according to ASTM G155-05 standards carry out sample
Indoors artificial accelerated aging test.Light that method simulation manually is subject in natural climate, heat, oxygen, moisture, based on rainfall
Want the environmental factor of aging damage.Main experimental condition is radiation intensity 0.55w/m2Wavelength is 340nm, and is obtained according to standard
The correlation of the accelerated ageing of film material xenon lamp and outdoor natural aging, by the 7A open airs analogy method of ASTM G155-05 standards
Xenon lamp aging is equivalent to this material natural aging ten days outdoors for one day.
In mulch anti ageing property detection process, such as relating to the test of the mechanical property to mulch, according to GB/T1040.3
Stretched plastic film performance test method standard carries out.
After Biodegradable mulch prepared by Examples 1 to 5 and comparative example 1~4 carries out accelerated ageing, ground film dynamic performance
Test result refer to table 1：
1. mulch tables of data of table
It comparing to obtain by 1 embodiment of table and comparative example, Biodegradable mulch ageing-resistant performance provided by the invention is excellent,
Service life is up to requirement of the crops to mulch that between 90~120 days, can meet growth cycle length, and the biodegradation
Mulch again can be degradable rapidly after more than usage time.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of Biodegradable mulch is made of the raw material for including following parts by weight of component：
The antioxidant includes antioxidant 1135；
The ultraviolet absorber includes ultraviolet absorber 571 and ultraviolet absorber 765 or including ultraviolet absorber 531 and ultraviolet
Absorbent 234；
The light stabilizer includes light stabilizer 944, light stabilizer 622 and light stabilizer 770 or including 770 He of light stabilizer
Light stabilizer 2020.
2. mulch according to claim 1, which is characterized in that the carbon dioxide-epoxy propane copolymer is in 190 DEG C of surveys
It is 0.5~1g/10min to try the melt index under temperature and 2.16kg testing loads.
3. mulch according to claim 1, which is characterized in that the poly- (tetramethylene adipate-terephthalic acid (TPA) fourth two
Alcohol ester) melt index under 190 DEG C of test temperatures and 2.16kg testing loads is 2~4g/10min.
4. mulch according to claim 1, which is characterized in that the chain extender is epoxy chain extenders.
5. mulch according to claim 4, which is characterized in that the model of the epoxy chain extenders include 4300,4370,
4368th, 9302, the 9320, one or more in YTPA-801, YTPA-803, YTPA-511 and KL-E4370.
6. mulch according to claim 1, which is characterized in that in terms of parts by weight, the raw material includes：
7. a kind of preparation method of Biodegradable mulch, comprises the following steps：
Raw material by melt blending, granulation and blow molding, obtains Biodegradable mulch successively；
The raw material includes 30~80 parts by weight carbon dioxide-epoxy propane copolymers, poly- (the adipic acid fourth of 48~50 parts by weight
Diol ester-mutual-phenenyl two acid bromide two alcohol ester), the chain extender of 0.2~0.5 parts by weight, the antioxidant of 0.1~0.5 parts by weight, 0.4
The light stabilizer of the ultraviolet absorber of~1 parts by weight and 0.5~1.5 parts by weight；
The antioxidant includes antioxidant 1135；The ultraviolet absorber includes ultraviolet absorber 571 and ultraviolet absorber 765,
Or including ultraviolet absorber 531 and ultraviolet absorber 234；The light stabilizer includes light stabilizer 944,622 and of light stabilizer
Light stabilizer 770 or including light stabilizer 770 and light stabilizer 2020.
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| CN106751559A (en) * | 2016-11-16 | 2017-05-31 | 华南理工大学 | A kind of ultraviolet aging resistance PBAT thin-film materials and preparation method thereof |
| CN110432049A (en) * | 2019-06-28 | 2019-11-12 | 甘肃济洋塑料有限公司 | A kind of ageing-resistant mulch of insect prevention |
| CN113683764B (en) * | 2021-08-27 | 2022-07-15 | 中国科学院长春应用化学研究所 | Branched PPC-based membrane and preparation method thereof |
| CN115711845B (en) * | 2022-10-26 | 2024-05-14 | 山东农业大学 | Method for predicting service life of biodegradable mulching film |
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| CN102942770A (en) * | 2012-12-10 | 2013-02-27 | 中国热带农业科学院湛江实验站 | Completely-biodegradable agricultural mulching film |
| CN102972393A (en) * | 2012-12-10 | 2013-03-20 | 中国热带农业科学院湛江实验站 | Agricultural weeding earth membrane capable of being completely biodegraded |
| CN104072952A (en) * | 2014-06-17 | 2014-10-01 | 浙江杭州鑫富药业股份有限公司 | Full-biodegradable mulching film with excellent transverse and longitudinal tearing property |
| CN104356611A (en) * | 2014-10-13 | 2015-02-18 | 新疆蓝山屯河化工股份有限公司 | Full biodegradable mulching film suitable for highly humid and hot environment and preparation method of full biodegradable mulching film |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102942770A (en) * | 2012-12-10 | 2013-02-27 | 中国热带农业科学院湛江实验站 | Completely-biodegradable agricultural mulching film |
| CN102972393A (en) * | 2012-12-10 | 2013-03-20 | 中国热带农业科学院湛江实验站 | Agricultural weeding earth membrane capable of being completely biodegraded |
| CN104072952A (en) * | 2014-06-17 | 2014-10-01 | 浙江杭州鑫富药业股份有限公司 | Full-biodegradable mulching film with excellent transverse and longitudinal tearing property |
| CN104356611A (en) * | 2014-10-13 | 2015-02-18 | 新疆蓝山屯河化工股份有限公司 | Full biodegradable mulching film suitable for highly humid and hot environment and preparation method of full biodegradable mulching film |
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