CN110229497A - Bio-based polyurethane/polylactic acid alloy blown film material and preparation method thereof - Google Patents
Bio-based polyurethane/polylactic acid alloy blown film material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2423/30—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by oxidation
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/08—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- 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
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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
- C08K3/34—Silicon-containing compounds
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
Abstract
The present invention relates to bio-based polyurethane/polylactic acid alloy blown film materials and preparation method thereof, maleic anhydride grafts are made by bio-based polyurethane and maleic anhydride first in the bio-based polyurethane/polylactic acid alloy blown film material, are then added into bio-based polyurethane and the blend of polylactic acid and react to obtain blown film material.Resulting materials good toughness, tear-resistant intensity are high.The method for being used to prepare the material is easy to operate, easy to spread.
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to bio-based polyurethane/polylactic acid alloy blown film material
And preparation method thereof.
Background technique
With the fast development of China's economic, the year two thousand twenty is arrived, China will replace the U.S. to become the maximum packaging market in the whole world,
Thus it becomes increasingly conspicuous to the demand of packing film.Traditional packing film material, such as polypropylene, polyethylene are with petroleum for original
Material, not only resource cannot regenerate and not allow degradable, cause significant damage to environment.For alleviating energy crisis, mitigate ring
Border pressure, China are just vigorously advocating the research and development of biology base and degradation material, this also becomes the most popular domain of high molecular material.
Poly-lactic acid material is a kind of biodegradable high molecular material, has the mechanical property similar with conventional plastic
Can, it is often blended with materials such as polyadipate/butylene terephthalate, poly butylene succinates and Biological Thin membrane material is prepared
Material, but since polylactic acid brittleness is big, tear-resistant intensity is low, elongation at break is small, gained film performance is undesirable.In order to mention
High packing film performance, people are just continuously attempting to for polylactic acid being blended with some other materials, wherein just including by poly- cream
Acid is blended with bio-based polyurethane, is desirably to obtain a kind of i.e. resistance to tear and environment amenable packing film.However, many institute's weeks
Know, polylactic acid and polyurethane compatibility are bad, are directly blended and are unable to get ideal product.
The existing data for preparing other high molecular materials is shown, can improve various macromolecules by the way that compatilizer is added
Compatibility between raw material, such as: the disclosed printing wire rod of 104592780 A of Chinese patent application CN is exactly to pass through that horse is added
The maleic anhydride grafted compatibility to improve polyurethane and polylactic acid, this mode, which can introduce other Grafting Structures, influences product
Can, on the other hand can only also meet this compatibility requirements not high product the needs of, for biological base film, which phase
Capacitive raising degree is insufficient, there are risks for performance improvement.
For another example: disclosing a kind of by the way that " maleic anhydride grafted polylactic acid " is added as compatilizer, in the prior art
Have and be directly grafted using macromolecule raw material as material with maleic anhydride, for example, Chinese patent application CN 107698951
A is exactly to obtain a kind of polylactic acid/degradable composite wood of cellulose biology base using maleic anhydride grafted polylactic acid as compatilizer
Material, but should " grafting " be achieved the purpose that with the compatibility for increasing polylactic acid and cellulose with cellulose enhance polylactic acid, and
And with maleic anhydride grafted polylactic acid, since polylactic acid is to heat and acid-sensitive, and maleic anhydride is highly acid substance, is being grafted
It is easy to degradation in journey, will cause polylactic acid melt index substantial increase, since film bubble is steady in blown film for blown film material requirements
It is fixed, therefore require material melt intensity high, each component melt index is stable and cannot be excessively high.To sum up use maleic anhydride grafted polylactic acid
It is not particularly suited for polylactic acid and bio-based polyurethane prepares alloy blown film material.
Summary of the invention
In order to solve the problems in the existing technology, first aspect present invention provides a kind of novel biological poly ammonia
Ester/polylactic acid alloy blown film material, bio-based polyurethane and polylactic acid compatibility are good in the material, the packing film prepared with it
Good toughness, tear-resistant intensity are high.
Bio-based polyurethane of the present invention/polylactic acid alloy blown film material in percentage by weight, first by 94-98
Part bio-based polyurethane, 0.5-2 parts of maleic anhydrides, 0.05-0.2 parts of tasteless initiators, 0.2-2 parts of lubricants and 0.2-2 parts are anti-
Maleic anhydride grafts are prepared in oxygen agent；Then by 5-15 parts of maleic anhydride grafts, 10-50 parts of polylactic acid, 30-70 parts of lifes
Bio-based polyurethane/polylactic acid is prepared in object based polyurethanes, 0.2-2 part lubricant, 0.2-2 parts of antioxidant and 2-20 parts of fillers
Alloy blown film material；
Wherein, the weight average molecular weight of the polylactic acid is 120000-180000；
The bio-based polyurethane is biological based thermoplastic polyurethane's elastomer rubber, weight average molecular weight 80000-
200000；
The tasteless initiator is cumyl peroxide or benzoyl peroxide；
The filler is talcum powder, wollastonite, calcium carbonate or kaolin.
In order to improve the compatibility of bio-based polyurethane and polylactic acid, introduces on bio-based polyurethane molecule and to react by force
Grafting bio-based polyurethane is made in maleic anhydride functional groups, since maleic anhydride grafts are identical as bio-based polyurethane structure,
Therefore it is good with bio-based polyurethane compatibility, simultaneously because maleic anhydride grafts contain the maleic groups of strong reactivity,
It can be reacted with the end group of polylactic acid, to reduce bio-based polyurethane and polylactic acid interfacial tension, make two kinds of materials
Compatibility is good.
Bio-based polyurethane of the present invention/polylactic acid alloy blown film tensile strength of material is high, elongation at break is high, right angle
Tearing strength is big, is made into packing film by method for processing forming such as injection molding, blown films.
In one embodiment, the weight ratio of the maleic anhydride and tasteless initiator is 10:1.
In another embodiment, the weight ratio of the maleic anhydride grafts and bio-based polyurethane is 1:9.5~1:
6, the weight ratio of the polylactic acid and bio-based polyurethane is 1:1.8~1:6.
In another embodiment, the antioxidant be four (β-(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] season
Four alcohol esters and/or three (2,4- di-tert-butylphenol) phosphite esters.
In another embodiment, the lubricant is white oil, in silicone oil, calcium stearate, silicone powder, oxidized polyethylene wax
It is one or more.
In yet another embodiment, in percentage by weight, by 98 parts of bio-based polyurethanes, 2 parts of maleic anhydrides, 0.2
Part cumyl peroxide initiator, 0.2 part of white oil, 0.1 part four (β-(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] Ji Si
Maleic anhydride grafts are prepared in alcohol ester and 0.2 part of three (2,4- di-tert-butylphenol) phosphite ester.
Use above-mentioned raw materials that can make bio-based polyurethane and polylactic acid than maleic anhydride grafts obtained arbitrarily to compare
Example is blended, not stratified, compatibility is good.
Also in one embodiment, in percentage by weight, gathered by 7~10 parts of maleic anhydride grafts, 10 parts -30 parts
Lactic acid, 50 parts of -70 parts of bio-based polyurethanes, 0.2 part of white oil, 0.2 copper silicon powder, 0.2 part of oxidized polyethylene wax, 0.1 part of four (β -
(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] season four alcohol esters, 0.2 part of three (2,4- di-tert-butylphenol) phosphite ester and 5-20
Bio-based polyurethane/polylactic acid alloy blown film material is prepared in part talcum powder.
The present invention forms polylactic acid, bio-based polyurethane under maleic anhydride grafts effect by melt extrusion technology
Alloy blown film material, strength of materials height, good toughness.
Another aspect of the present invention additionally provides aforementioned biological based polyurethanes/polylactic acid alloy blown film material preparation method,
Include the following steps
(1) preparation of maleic anhydride grafts: by bio-based polyurethane, maleic anhydride, tasteless initiator, antioxidant and profit
Lubrication prescription is squeezed out by double screw extruder in 160 DEG C -190 DEG C after mixing；
(2) bio-based polyurethane/polylactic acid alloy blown film material preparation: by maleic anhydride grafts, polylactic acid, biology
Based polyurethanes, lubricant, antioxidant and filler are squeezed out by double screw extruder in 160 DEG C -190 DEG C after mixing.
In one embodiment, in step (1), the double screw extruder is divided into six heating zones, and each area's temperature is from head
Successively to tail are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 185 DEG C of 5th area, 185 DEG C of 6th area.
In another embodiment, in step (1), the screw slenderness ratio of the double screw extruder is 40.
Beneficial effects of the present invention:
Bio-based polyurethane of the present invention/polylactic acid alloy blown film material is by degradable biological based polyurethanes and poly- cream
Acid is prepared, and wherein bio-based polyurethane source is renewable, and does not influence the reproducibility and degradability of matrix polylactic acid.
Maleic anhydride grafts compatilizer significant effect, a small amount of compatilizer, which is added, just significantly improves the elongation at break of alloy, also
The tearing-resistant performance of polyurethane is maintained, obtained alloy material can form various packing films by squeezing out blown film techniques.
Specific embodiment
By specific embodiment, the present invention is described in further detail when the same below, but they are not constituted to the present invention
Restriction, it is only for example.
Embodiment 1
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) 20 parts, 75 parts biology base thermoplastic polyurethane elastomer rubber of polylactic acid, 0.2 part of white oil, 0.2 part of silicon are weighed
Ketone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of irgasfos 168,5 parts of talcum powder room temperature in high mixer
10min is mixed, 180 DEG C of melt temperature of extruding pelletization are made, finds that extrudate mould port expansion is serious in an experiment, flowing is unstable
Fixed, cannot pull strings pelletizing.This is because caused by biology base thermoplastic polyurethane elastomer rubber and polylactic acid poor compatibility.
Embodiment 2
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) then take 98 parts of biology base thermoplastic polyurethane elastomer rubber, 2 parts of maleic anhydrides, 0.2 part of peroxidating two different
Propyl benzene initiator, 0.2 part of white oil, 0.1 part of antioxidant 1010/0.2 part irgasfos 168 room temperature mixing 10min in high mixer；
(3) resulting blend is added to extruding pelletization in double screw extruder, the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area, 185 DEG C of head, screw speed 130rpm, screw diameter 30mm, screw slenderness ratio 40；
(4) pellet made from previous step is dried 6h in 90 DEG C of convection ovens；
(5) 7 parts of maleic anhydride grafts, 20 parts of polylactic acid, 66 parts of biological based thermoplastic polyurethane's bullets after weighing drying
Property body rubber, 0.2 part of white oil, 0.2 part of silicone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of antioxidant
168,5 parts of talcum powder room temperature mixing 10min in high mixer makes 180 DEG C of melt temperature of extruding pelletization, obtains biological poly
Urethane/polylactic acid alloy blown film material.
The melt index of the material is 0.5g/10min, and tensile strength 42.5MP, elongation at break 557%, right angle is torn
Resistance to spalling is 5.7N.
Embodiment 3
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) then take 98 parts of biology base thermoplastic polyurethane elastomer rubber, 2 parts of maleic anhydrides, 0.2 part of peroxidating two different
Propyl benzene initiator, 0.2 part of white oil, 0.1 part of antioxidant 1010/0.2 part irgasfos 168 room temperature mixing 10min in high mixer；
(3) resulting blend is added to extruding pelletization in double screw extruder, the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area, 185 DEG C of head, screw speed 130rpm, screw diameter 30mm, screw slenderness ratio 40；
(4) pellet made from previous step is dried 6h in 90 DEG C of convection ovens；
(5) 7 parts of maleic anhydride grafts, 25 parts of polylactic acid, 61 parts of biological based thermoplastic polyurethane's bullets after weighing drying
Property body rubber, 0.2 part of white oil, 0.2 part of silicone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of antioxidant
168,5 parts of talcum powder room temperature mixing 10min in high mixer makes 180 DEG C of melt temperature of extruding pelletization, obtains biological poly
Urethane/polylactic acid alloy blown film material.
The melt index of the material is 0.63g/10min, tensile strength 43MP, elongation at break 523%, right-angle tearing
Intensity is 5.3N.
Embodiment 4
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) then take 98 parts of biology base thermoplastic polyurethane elastomer rubber, 2 parts of maleic anhydrides, 0.2 part of peroxidating two different
Propyl benzene initiator, 0.2 part of white oil, 0.1 part of antioxidant 1010/0.2 part irgasfos 168 room temperature mixing 10min in high mixer；
(3) resulting blend is added to extruding pelletization in double screw extruder, the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area, 185 DEG C of head, screw speed 130rpm, screw diameter 30mm, screw slenderness ratio 40；
(4) pellet made from previous step is dried 6h in 90 DEG C of convection ovens；
(5) 7 parts of maleic anhydride grafts, 30 parts of polylactic acid, 56 parts of biological based thermoplastic polyurethane's bullets after weighing drying
Property body rubber, 0.2 part of white oil, 0.2 part of silicone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of antioxidant
168,5 parts of talcum powder room temperature mixing 10min in high mixer makes 180 DEG C of melt temperature of extruding pelletization, obtains biological poly
Urethane/polylactic acid alloy blown film material.
The melt index of the material is 0.73g/10min, tensile strength 39MP, elongation at break 480%, right-angle tearing
Intensity is 4.3N.
Embodiment 5
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) then take 98 parts of biology base thermoplastic polyurethane elastomer rubber, 2 parts of maleic anhydrides, 0.2 part of peroxidating two different
Propyl benzene initiator, 0.2 part of white oil, 0.1 part of antioxidant 1010/0.2 part irgasfos 168 room temperature mixing 10min in high mixer；
(3) resulting blend is added to extruding pelletization in double screw extruder, the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area, 185 DEG C of head, screw speed 130rpm, screw diameter 30mm, screw slenderness ratio 40；
(4) pellet made from previous step is dried 6h in 90 DEG C of convection ovens；
(5) 10 parts of maleic anhydride grafts, 10 parts of polylactic acid, 60 parts of biological based thermoplastic polyurethane's bullets after weighing drying
Property body rubber, 0.2 part of white oil, 0.2 part of silicone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of antioxidant
168,20 parts of talcum powder room temperature mixing 10min in high mixer makes 180 DEG C of melt temperature of extruding pelletization, obtains biology base
Polyurethane/polylactic acid alloy blown film material.
The melt index of the material is 2g/10min, tensile strength 26.7MP, elongation at break 550%, right-angle tearing
Intensity is 5.1N.
Embodiment 6
(1) polylactic acid (4032D) is dried 6h, biology base thermoplastic polyurethane elastomer in 65 DEG C of convection ovens
Rubber (12T80) 90 DEG C of drying process 6h in convection oven.
(2) then take 98 parts of biology base thermoplastic polyurethane elastomer rubber, 2 parts of maleic anhydrides, 0.2 part of peroxidating two different
Propyl benzene initiator, 0.2 part of white oil, 0.1 part of antioxidant 1010/0.2 part irgasfos 168 room temperature mixing 10min in high mixer；
(3) resulting blend is added to extruding pelletization in double screw extruder, the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area, 185 DEG C of head, screw speed 130rpm, screw diameter 30mm, screw slenderness ratio 40；
(4) pellet made from previous step is dried 6h in 90 DEG C of convection ovens；
(5) 10 parts of maleic anhydride grafts, 10 parts of polylactic acid, 60 parts of biological based thermoplastic polyurethane's bullets after weighing drying
Property body rubber, 0.2 part of white oil, 0.2 part of silicone powder, 0.2 part of oxidized polyethylene wax, 0.1 part of antioxidant 1010,0.2 part of antioxidant
168,10 parts of talcum powder, 10 parts of calcium carbonate room temperature mixing 10min in high mixer, make 180 DEG C of melt temperature of extruding pelletization,
Obtain bio-based polyurethane/polylactic acid alloy blown film material.
The melt index of the material is 3.2g/10min, tensile strength 25MP, elongation at break 575%, right-angle tearing
Intensity is 5N.
Embodiment 7
Express delivery packing film is made using blowfilm shaping in alloy blown film material made from embodiment 2~6, and on sampling machine
Standard sample is made, then carried out respectively according to standard GB/T9643, GB 13,022 1 91, QB/T1130-91 melt index,
Tensile strength elongation at break and right-angle tearing test, compare and collect river blown film grade PBAT TH801T for commercially available Lanshan County.Specific performance
Data are as shown in table 1:
Blend modified not only tensile strength with higher as can be seen from Table 1, it may have very high fracture
Elongation, while the tear resistance for also having polyurethane excellent.This is because maleic anhydride is grafted biology base thermoplastic poly ammonia
Ester elastomer rubber can reduce the interfacial tension between the above material each component, keep each component compatibility good, so that alloy material
Material has the excellent performance of each component concurrently.Alloy material modified is used directly for the fields such as express delivery packing film.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. bio-based polyurethane/polylactic acid alloy blown film material, it is characterised in that: in percentage by weight, first by 94-98
Part bio-based polyurethane, 0.5-2 parts of maleic anhydrides, 0.05-0.2 parts of tasteless initiators, 0.2-2 parts of lubricants and 0.2-2 parts are anti-
Maleic anhydride grafts are prepared in oxygen agent；Then by 5-15 parts of maleic anhydride grafts, 10-50 parts of polylactic acid, 30-70 parts of lifes
Bio-based polyurethane/polylactic acid is prepared in object based polyurethanes, 0.2-2 part lubricant, 0.2-2 parts of antioxidant and 2-20 parts of fillers
Alloy blown film material；
Wherein, the weight average molecular weight of the polylactic acid is 120000-180000；
The bio-based polyurethane is biological based thermoplastic polyurethane's elastomer rubber, weight average molecular weight 80000-
200000；
The tasteless initiator is cumyl peroxide or benzoyl peroxide；
The filler is talcum powder, wollastonite, calcium carbonate or kaolin.
2. bio-based polyurethane according to claim 1/polylactic acid alloy blown film material, it is characterised in that: the Malaysia
The weight ratio of acid anhydrides and tasteless initiator is 10:1.
3. bio-based polyurethane according to claim 2/polylactic acid alloy blown film material, it is characterised in that: the Malaysia
The weight ratio of acid anhydrides graft and bio-based polyurethane is 1:9.5~1:6, the weight ratio of the polylactic acid and bio-based polyurethane
For 1:1.8~1:6.
4. bio-based polyurethane according to claim 3/polylactic acid alloy blown film material, it is characterised in that: the antioxygen
Agent be four (β-(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] season four alcohol ester and/or three (2,4- di-tert-butylphenol) phosphorous
Acid esters.
5. bio-based polyurethane according to claim 4/polylactic acid alloy blown film material, it is characterised in that: the lubrication
Agent is one of white oil, silicone oil, calcium stearate, silicone powder, oxidized polyethylene wax or a variety of.
6. bio-based polyurethane according to claim 5/polylactic acid alloy blown film material, it is characterised in that: according to weight
Percentages, by 98 parts of bio-based polyurethanes, 2 parts of maleic anhydrides, 0.2 part of cumyl peroxide initiator, 0.2 part of white oil,
0.1 part four (β-(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] season four alcohol ester and 0.2 part of three (2,4- di-tert-butylphenol) phosphorous
Maleic anhydride grafts are prepared in acid esters.
7. bio-based polyurethane according to claim 6/polylactic acid alloy blown film material, it is characterised in that: according to weight
Percentages, by 7~10 parts of maleic anhydride grafts, 10 parts of -30 parts of polylactic acid, 50 parts of -70 parts of bio-based polyurethanes, 0.2 part
White oil, 0.2 copper silicon powder, 0.2 part of oxidized polyethylene wax, 0.1 part four (β-(3,5- di-tert-butyl -4- hydroxy phenyl) propionic acid] Ji Si
Bio-based polyurethane/polylactic acid is prepared in alcohol ester, 0.2 part of three (2,4- di-tert-butylphenol) phosphite ester and 5-20 parts of talcum powder
Alloy blown film material.
8. bio-based polyurethane described in any one of claim 1-7/polylactic acid alloy blown film material preparation method, feature
It is: includes the following steps
(1) preparation of maleic anhydride grafts: by bio-based polyurethane, maleic anhydride, tasteless initiator, antioxidant and lubricant
By double screw extruder in 160 DEG C of -190 DEG C of extrusions after mixing；
(2) bio-based polyurethane/polylactic acid alloy blown film material preparation: by maleic anhydride grafts, polylactic acid, biological poly
Urethane, lubricant, antioxidant and filler are squeezed out by double screw extruder in 160 DEG C -190 DEG C after mixing.
9. preparation method according to claim 8, it is characterised in that: in step (1), the double screw extruder is divided into six
A heating zone, each area's temperature from head to tail successively are as follows: 175 DEG C of an area, 175 DEG C of 2nd area, 180 DEG C of 3rd area, 185 DEG C of 4th area, 5th area
185 DEG C, 185 DEG C of 6th area.
10. preparation method according to claim 9, it is characterised in that: in step (1), the spiral shell of the double screw extruder
Bar draw ratio is 40.
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