CN110157160A - A kind of high-performance environmentally-friendly degradable billboard and preparation method thereof - Google Patents
A kind of high-performance environmentally-friendly degradable billboard and preparation method thereof Download PDFInfo
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- CN110157160A CN110157160A CN201810233654.7A CN201810233654A CN110157160A CN 110157160 A CN110157160 A CN 110157160A CN 201810233654 A CN201810233654 A CN 201810233654A CN 110157160 A CN110157160 A CN 110157160A
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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
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/04—Starch derivatives, e.g. crosslinked derivatives
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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
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- 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 discloses a kind of high-performance environmentally-friendly degradable billboards, include the raw material of following parts by weight: 32-38 parts of modified butanediol ester poly succinic acid, 24-28 parts of modified starch, 18-22 parts of polycarbonate, 6-10 parts of coupling agent, 5-9 parts of plasticizer, 5-9 parts of polyvinyl acetate, 3-6 parts of polyvinyl butyral, 2-4 parts of powdered whiting, 1-3 parts of talcum powder.The object of the present invention is to provide a kind of high-performance environmentally-friendly degradable billboards, nano-cellulose has excellent mechanical performance, toughness, good dispersion, succinic acid-butanediol ester is Wholly-degradable material, succinic acid-butanediol ester is modified, as the base-material of billboard, the mechanical performance and degradability of billboard are improved.
Description
Technical field
The present invention relates to technical field of advertisement, and in particular to a kind of high-performance environmentally-friendly degradable billboard and its preparation
Method.
Background technique
Advertisement is, by the media of certain forms, to disclose for certain specific needs and widely transmit and believe to the public
The publicity measures of breath drive information medium to develop rapidly with people's living standard and economic fast development, thus advertisement
Also it is followed by development, advertisement is seen everywhere in people's lives, and billboard is the important embodiment of advertisement, more and more wide
Accuse plate will cause environmental pollution unconsciously, and certain threat is caused to our living environment.
Existing billboard degradation effect is poor, while corresponding requirement is also not achieved in mechanical performance, holds during the installation process
Easy to damage, economic cost is also correspondingly improved, and the technology for limiting billboard develops, Chinese patent literature " (application number:
201710903278.3) a kind of degradable foamed billboard of safe environment protection type, each component system including following parts by weight " are disclosed
It is standby to form: 60-120 parts of polyether polyol, 40-80 parts of polyester resin, 50-70 parts of ABS resin, 20-45 parts of sepiolite powder, different
15 parts of potassium zincate 5-, 8-13 parts of one ethyl acrylate copolymers of ethylene, 5-15 parts of polyisocyanates, 10-15 parts of maleic anhydride, gather
1-5 parts of ethylene waxes, 10-15 parts of kaolin, 15-30 parts of initiator, 2-8 parts of dibutyl tin dilaurate, precipitated calcium carbonate 5-12
Part, 1-6 parts of degradation agent, is urged at 20-35 parts of foaming agent, 15-25 parts of plant amylum, 10-15 parts of natural gum, 5-8 parts of composite flame-retardant agent
2-5 parts of agent, 5-13 parts of glass fibre, 2-8 parts of abaca fibre, 1-3 parts of plasticizer, 1-3 parts of antibacterial agent, it is wide in the document
It accuses plate and interworking is carried out using plurality of raw materials, the degradation effect reached is not it is obvious that mechanical performance is not very good simultaneously.
Summary of the invention
The purpose of the present invention is to provide a kind of high-performance environmentally-friendly degradable billboards, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of high-performance environmentally-friendly degradable billboard, the raw material including following parts by weight:
32-38 parts of modified butanediol ester poly succinic acid, 24-28 parts of modified starch, 18-22 parts of polycarbonate, 6-10 parts of coupling agent,
5-9 parts of plasticizer, 5-9 parts of polyvinyl acetate, 3-6 parts of polyvinyl butyral, 2-4 parts of powdered whiting, 1-3 parts of talcum powder.
Be as further scheme of the invention: the high-performance environmentally-friendly degradable billboard includes following parts by weight
Raw material:
35 portions of modified butanediol ester poly succinic acid, 20 parts of polycarbonate, 8 parts of coupling agent, 7 parts of plasticizer, gathers 26 parts of modified starch
7 parts of vinyl acetate, 4.5 parts of polyvinyl butyral, 3 parts of powdered whiting, 2 parts of talcum powder.
Be as further scheme of the invention: the preparation method of the modified butanediol ester poly succinic acid is after cleaning
Cornstalk is added in high speed disintegrator and is crushed to 40-100 mesh, and corncob, toluene-methanol mixed liquor are added to water-bath after crushing
Middle reaction, reaction temperature are 75-85 DEG C, are then added in sulfuric acid solution thereto, adjust pH to 3-4, add sodium hydroxide
To solution neutral sodium bromide, sodium hypochlorite is then added, speed of agitator 85-95r/min stirs 35- in alkalization into solution again
45min then carries out washing and filters drying, nano-cellulose obtained, by nano-cellulose, metatitanic acid coupling agent, poly-succinic fourth
Diol ester is added in high-speed mixer, revolving speed 105-115r/min, continues to stir 45-55min to get modified poly-succinic fourth
Diol ester.
Be as further scheme of the invention: the modified starch preparation method is that starch is added to the water point
It dissipates, is then added sodium hydroxide solution, speed of agitator 65-75r/min, mixing time 25-35min, then again thereto
Chain extender is added, continues to stir 35-45min, coupling agent KH-560, polylactic acid is finally added thereto, revolving speed rises to 85-95r/
Min stirs 1-2h to get modified starch.
Be as further scheme of the invention: the chain extender is neopentyl glycol, 1,6 one hexylene glycols, according to weight ratio
The mixture of 5:3 composition.
Be as further scheme of the invention: the coupling agent is metatitanic acid coupling agent.
Be as further scheme of the invention: the plasticizer is diisooctyl phthalate, phthalic acid two
Cyclohexyl, dioctyl phthalate are according to weight ratio (11-17): (6-10): the mixture of 3 compositions.
The present invention also provides a kind of preparation methods of high-performance environmentally-friendly degradable billboard, comprising the following steps:
Step 1 weighs each component raw material as required；
Modified butanediol ester poly succinic acid, modified starch, polycarbonate are sequentially added high-speed mixer by step 2 in order
In, speed of agitator 550-650r/min, mixing time 35-45min obtain mixture A, by mixture A obtained, heavy
Calcium carbonate, talcum powder are sent into reaction kettle, and reaction temperature is 105-115 DEG C, and reaction time 25-35min obtains mixture B；
Step 2 is obtained mixture B, coupling agent, plasticizer, polyvinyl acetate, polyvinyl butyral in order by step 3
It sequentially adds in high-speed mixer, speed of agitator 1250-1350r/min, mixing time 45-55min, by mixture obtained
Three-section type heating single screw rod is added and squeezes out inflation film manufacturing machine, 165 DEG C or so of area's feed zone temperature melting temperature, 2nd area, the melting of 3rd area
Duan Wendu is 165-175 DEG C, and for die temperature between 145-155 DEG C, die gap is less than 1.0mm, single screw rod revolving speed 12-22r/
Min, cooling obtain high-performance environmentally-friendly degradable billboard.
Compared with prior art, the present invention have it is following the utility model has the advantages that
A kind of high-performance environmentally-friendly degradable billboard of the invention, nano-cellulose have excellent mechanical performance, toughness,
Good dispersion, succinic acid-butanediol ester are Wholly-degradable materials, and succinic acid-butanediol ester is modified, the base as billboard
Material, improves the mechanical performance and degradability of billboard, polylactic acid of the invention is degradable material, after starch conversion
Billboard is set both to ensure that degradability together as substrate with modified butanediol ester poly succinic acid, but also with excellent mechanicalness
Can, polycarbonate, polyvinyl acetate, polyvinyl butyral are increased into surface-active by metatitanic acid coupling agent, keep raw material more preferable
It is compatible together, pass through change plasticizer in diisooctyl phthalate, dicyclohexyl phthalate, phthalic acid
The mass ratio of each substance of dioctyl ester, reaches optimal fracture tensile strength, impact strength.
Specific embodiment
Combined with specific embodiments below, technical scheme in the embodiment of the invention is clearly and completely described, shows
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1:
A kind of high-performance environmentally-friendly degradable billboard of the present embodiment, the raw material including following parts by weight:
32 portions of modified butanediol ester poly succinic acid, 18 parts of polycarbonate, 6 parts of coupling agent, 5 parts of plasticizer, gathers 24 parts of modified starch
5 parts of vinyl acetate, 3 parts of polyvinyl butyral, 2 parts of powdered whiting, 1 part of talcum powder.
The preparation method of the modified butanediol ester poly succinic acid of the present embodiment is that will clean rear cornstalk high speed crushing is added
40 mesh are crushed in machine, corncob, toluene-methanol mixed liquor are added in water-bath and react after crushing, and reaction temperature is 75 DEG C,
It is then added in sulfuric acid solution thereto, adjusts pH to 3, add sodium hydroxide and alkalize to solution neutral, then again to solution
Middle addition sodium bromide, sodium hypochlorite, speed of agitator 85r/min stir 35min, then carry out washing and filter drying, are received
Rice cellulose nano-cellulose, metatitanic acid coupling agent, poly butylene succinate is added in high-speed mixer, revolving speed 105r/
Min continues to stir 45min to get modified butanediol ester poly succinic acid.
The modified starch preparation method of the present embodiment is that starch is added to the water to disperse, and sodium hydroxide is then added
Chain extender is then added in solution, speed of agitator 65r/min, mixing time 25min thereto again, continues to stir 35min,
Coupling agent KH-560, polylactic acid are finally added thereto, revolving speed rises to 85r/min, stirs 1h to get modified starch.
The chain extender of the present embodiment is neopentyl glycol, 1,6 one hexylene glycols, the mixture formed according to weight ratio 5:3.
Be as further scheme of the invention: the coupling agent is metatitanic acid coupling agent.
The plasticizer of the present embodiment is diisooctyl phthalate, dicyclohexyl phthalate, phthalic acid two
The mixture that monooctyl ester is formed according to weight ratio 11:6:3.
A kind of preparation method of the high-performance environmentally-friendly degradable billboard of the present embodiment, comprising the following steps:
Step 1 weighs each component raw material as required；
Modified butanediol ester poly succinic acid, modified starch, polycarbonate are sequentially added high-speed mixer by step 2 in order
In, speed of agitator 550r/min, mixing time 35min obtain mixture A, by mixture A obtained, powdered whiting,
Talcum powder is sent into reaction kettle, and reaction temperature is 105 DEG C, and reaction time 25min obtains mixture B；
Step 2 is obtained mixture B, coupling agent, plasticizer, polyvinyl acetate, polyvinyl butyral in order by step 3
It sequentially adds in high-speed mixer, speed of agitator 1250r/min, mixing time 45min, mixture obtained is added three sections
Formula heats single screw rod and squeezes out inflation film manufacturing machine, and 165 DEG C or so of area's feed zone temperature melting temperature, 2nd area, three area's melt zone temperature are
165 DEG C, for die temperature between 145 DEG C, die gap is less than 1.0mm, single screw rod revolving speed 12r/min, and cooling obtains high-performance
Environment-friendly degradable type billboard.
Embodiment 2:
A kind of high-performance environmentally-friendly degradable billboard of the present embodiment, the raw material including following parts by weight:
38 parts of modified butanediol ester poly succinic acid, 28 parts of modified starch, 22 parts of polycarbonate, 10 parts of coupling agent, 9 parts of plasticizer,
9 parts of polyvinyl acetate, 6 parts of polyvinyl butyral, 4 parts of powdered whiting, 3 parts of talcum powder.
The preparation method of the modified butanediol ester poly succinic acid of the present embodiment is that will clean rear cornstalk high speed crushing is added
100 mesh are crushed in machine, corncob, toluene-methanol mixed liquor are added in water-bath and react after crushing, reaction temperature 85
DEG C, it is then added in sulfuric acid solution thereto, adjusts pH to 4, add sodium hydroxide and alkalize to solution neutral, then Xiang Rong again
Sodium bromide, sodium hypochlorite are added in liquid, speed of agitator 95r/min stirs 45min, then carries out washing and filters drying, obtains
Nano-cellulose, metatitanic acid coupling agent, poly butylene succinate are added in high-speed mixer nano-cellulose, and revolving speed is
115r/min continues to stir 55min to get modified butanediol ester poly succinic acid.
The modified starch preparation method of the present embodiment is that starch is added to the water to disperse, and sodium hydroxide is then added
Chain extender is then added in solution, speed of agitator 75r/min, mixing time 35min thereto again, continues to stir 45min,
Coupling agent KH-560, polylactic acid are finally added thereto, revolving speed rises to 95r/min, stirs 2h to get modified starch.
The chain extender of the present embodiment is neopentyl glycol, 1,6 one hexylene glycols, the mixture formed according to weight ratio 5:3.
Be as further scheme of the invention: the coupling agent is metatitanic acid coupling agent.
The plasticizer of the present embodiment is diisooctyl phthalate, dicyclohexyl phthalate, phthalic acid two
The mixture that monooctyl ester is formed according to weight ratio 17:10): 3.
A kind of preparation method of the high-performance environmentally-friendly degradable billboard of the present embodiment, comprising the following steps:
Step 1 weighs each component raw material as required；
Modified butanediol ester poly succinic acid, modified starch, polycarbonate are sequentially added high-speed mixer by step 2 in order
In, speed of agitator 650r/min, mixing time 45min obtain mixture A, by mixture A obtained, powdered whiting,
Talcum powder is sent into reaction kettle, and reaction temperature is 115 DEG C, and reaction time 35min obtains mixture B；
Step 2 is obtained mixture B, coupling agent, plasticizer, polyvinyl acetate, polyvinyl butyral in order by step 3
It sequentially adds in high-speed mixer, speed of agitator 1350r/min, mixing time 55min, mixture obtained is added three sections
Formula heats single screw rod and squeezes out inflation film manufacturing machine, and 165 DEG C or so of area's feed zone temperature melting temperature, 2nd area, three area's melt zone temperature are
175 DEG C, for die temperature between 155 DEG C, die gap is less than 1.0mm, single screw rod revolving speed 22r/min, and cooling obtains high-performance
Environment-friendly degradable type billboard.
Embodiment 3:
A kind of high-performance environmentally-friendly degradable billboard of the present embodiment, the raw material including following parts by weight:
35 portions of modified butanediol ester poly succinic acid, 20 parts of polycarbonate, 8 parts of coupling agent, 7 parts of plasticizer, gathers 26 parts of modified starch
7 parts of vinyl acetate, 4.5 parts of polyvinyl butyral, 3 parts of powdered whiting, 2 parts of talcum powder.
The preparation method of the modified butanediol ester poly succinic acid of the present embodiment is that will clean rear cornstalk high speed crushing is added
70 mesh are crushed in machine, corncob, toluene-methanol mixed liquor are added in water-bath and react after crushing, and reaction temperature is 80 DEG C,
It is then added in sulfuric acid solution thereto, adjusts pH to 3.5, add sodium hydroxide and alkalize to solution neutral, then Xiang Rong again
Sodium bromide, sodium hypochlorite are added in liquid, speed of agitator 90r/min stirs 40min, then carries out washing and filters drying, obtains
Nano-cellulose, metatitanic acid coupling agent, poly butylene succinate are added in high-speed mixer nano-cellulose, and revolving speed is
110r/min continues to stir 50min to get modified butanediol ester poly succinic acid.
The modified starch preparation method of the present embodiment is that starch is added to the water to disperse, and sodium hydroxide is then added
Chain extender is then added in solution, speed of agitator 70r/min, mixing time 30min thereto again, continues to stir 40min,
Coupling agent KH-560, polylactic acid are finally added thereto, revolving speed rises to 90r/min, stirs 1.5h to get modified starch.
The chain extender of the present embodiment is neopentyl glycol, 1,6 one hexylene glycols, the mixture formed according to weight ratio 5:3.
Be as further scheme of the invention: the coupling agent is metatitanic acid coupling agent.
The plasticizer of the present embodiment is diisooctyl phthalate, dicyclohexyl phthalate, phthalic acid two
The mixture that monooctyl ester is formed according to weight ratio 14:8:3.
A kind of preparation method of the high-performance environmentally-friendly degradable billboard of the present embodiment, comprising the following steps:
Step 1 weighs each component raw material as required；
Modified butanediol ester poly succinic acid, modified starch, polycarbonate are sequentially added high-speed mixer by step 2 in order
In, speed of agitator 600r/min, mixing time 40min obtain mixture A, by mixture A obtained, powdered whiting,
Talcum powder is sent into reaction kettle, and reaction temperature is 110 DEG C, and reaction time 30min obtains mixture B；
Step 2 is obtained mixture B, coupling agent, plasticizer, polyvinyl acetate, polyvinyl butyral in order by step 3
It sequentially adds in high-speed mixer, speed of agitator 1300r/min, mixing time 50min, mixture obtained is added three sections
Formula heats single screw rod and squeezes out inflation film manufacturing machine, and 165 DEG C or so of area's feed zone temperature melting temperature, 2nd area, three area's melt zone temperature are
170 DEG C, for die temperature between 150 DEG C, die gap is less than 1.0mm, single screw rod revolving speed 17r/min, and cooling obtains high-performance
Environment-friendly degradable type billboard.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of high-performance environmentally-friendly degradable billboard, which is characterized in that the raw material including following parts by weight:
32-38 parts of modified butanediol ester poly succinic acid, 24-28 parts of modified starch, 18-22 parts of polycarbonate, 6-10 parts of coupling agent,
5-9 parts of plasticizer, 5-9 parts of polyvinyl acetate, 3-6 parts of polyvinyl butyral, 2-4 parts of powdered whiting, 1-3 parts of talcum powder.
2. a kind of high-performance environmentally-friendly degradable billboard according to claim 1, which is characterized in that the high-performance
Environment-friendly degradable type billboard include following parts by weight raw material:
35 portions of modified butanediol ester poly succinic acid, 20 parts of polycarbonate, 8 parts of coupling agent, 7 parts of plasticizer, gathers 26 parts of modified starch
7 parts of vinyl acetate, 4.5 parts of polyvinyl butyral, 3 parts of powdered whiting, 2 parts of talcum powder.
3. a kind of high-performance environmentally-friendly degradable billboard according to claim 1 or 2, which is characterized in that described to change
Property poly butylene succinate preparation method be that will clean rear cornstalk and be added in high speed disintegrator to be crushed to 40-100 mesh, powder
Corncob, toluene-methanol mixed liquor are added in water-bath and react after broken, and reaction temperature is 75-85 DEG C, are then added thereto
In sulfuric acid solution, adjust pH to 3-4, add sodium hydroxide and alkalize to solution neutral, be then added again into solution sodium bromide,
Sodium hypochlorite, speed of agitator 85-95r/min stir 35-45min, then carry out washing and filter drying, obtain nanofiber
Element nano-cellulose, metatitanic acid coupling agent, poly butylene succinate is added in high-speed mixer, revolving speed 105-115r/
Min continues to stir 45-55min to get modified butanediol ester poly succinic acid.
4. a kind of high-performance environmentally-friendly degradable billboard according to claim 1, which is characterized in that the modified shallow lake
Powder, preparation method thereof is that starch is added to the water to disperse, and sodium hydroxide solution, speed of agitator 65-75r/ is then added
Min, mixing time 25-35min, is then added chain extender thereto again, continues to stir 35-45min, finally be added thereto
Coupling agent KH-560, polylactic acid, revolving speed rise to 85-95r/min, stir 1-2h to get modified starch.
5. a kind of high-performance environmentally-friendly degradable billboard according to claim 4, which is characterized in that the chain extender
For neopentyl glycol, 1,6 one hexylene glycols, the mixture formed according to weight ratio 5:3.
6. a kind of high-performance environmentally-friendly degradable billboard according to claim 1, which is characterized in that the coupling agent
For metatitanic acid coupling agent.
7. a kind of high-performance environmentally-friendly degradable billboard according to claim 1, which is characterized in that the plasticizer
It is diisooctyl phthalate, dicyclohexyl phthalate, dioctyl phthalate according to weight ratio (11-17): (6-
10): the mixture of 3 compositions.
8. a kind of high-performance environmentally-friendly degradable billboard according to claim 1 or 2, which is characterized in that including with
Lower step:
Step 1 weighs each component raw material as required；
Modified butanediol ester poly succinic acid, modified starch, polycarbonate are sequentially added high-speed mixer by step 2 in order
In, speed of agitator 550-650r/min, mixing time 35-45min obtain mixture A, by mixture A obtained, heavy
Calcium carbonate, talcum powder are sent into reaction kettle, and reaction temperature is 105-115 DEG C, and reaction time 25-35min obtains mixture B；
Step 2 is obtained mixture B, coupling agent, plasticizer, polyvinyl acetate, polyvinyl butyral in order by step 3
It sequentially adds in high-speed mixer, speed of agitator 1250-1350r/min, mixing time 45-55min, by mixture obtained
Three-section type heating single screw rod is added and squeezes out inflation film manufacturing machine, 165 DEG C or so of area's feed zone temperature melting temperature, 2nd area, the melting of 3rd area
Duan Wendu is 165-175 DEG C, and for die temperature between 145-155 DEG C, die gap is less than 1.0mm, single screw rod revolving speed 12-22r/
Min, cooling obtain high-performance environmentally-friendly degradable billboard.
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| CN117818175A (en) * | 2024-01-03 | 2024-04-05 | 广东创时尚智能股份有限公司 | Antibacterial and anti-mite composite fabric and preparation method thereof |
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