CN103724950B - A kind of composition and method of making the same and PBAT preservative film containing PBAT - Google Patents
A kind of composition and method of making the same and PBAT preservative film containing PBAT Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a kind of composition and method of making the same and the PBAT preservative film that contain PBAT.PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant should be contained by composition containing PBAT; With the gross weight of composition for benchmark, the content of PBAT is 73-95 % by weight, and the content of modified nano calcium carbonate is 0.1-22 % by weight, and the content of compatilizer is 2-3 % by weight, and the content of oxidation inhibitor is 0.1-2 % by weight, and the content of lubricant is 0.1-2 % by weight.By adding modified nano calcium carbonate in PBAT, the intensity of the material of preparation after Blown Film is greatly improved, simultaneously because of the use of modified nano calcium carbonate, also reduce cost, improve cost performance, prepared that a kind of cost performance is high, processing characteristics is good, Kekelé structure count is good containing the material of PBAT and the preservative film based on this material produce.
Description
Technical field
The present invention relates to macromolecule chemical material, particularly, relate to a kind of composition and method of making the same and the PBAT preservative film that contain PBAT.
Background technology
At present, in daily productive life, preservative film has been widely used in family life and part packaging industry, and this plastic fresh-keeping membrane be widely used is all traditional petroleum-based PE preservative film substantially.This preservative film is very thin due to thickness, is difficult to be recovered utilization, also non-degradable at occurring in nature after discarded, causes white pollution.
PBAT is poly-hexanodioic acid and butylene terephthalate multipolymer, there is excellent biological degradability, have the characteristic of PBA and PBT concurrently simultaneously, existing good ductility and elongation at break, also good thermotolerance and impact property is had, therefore enjoy the concern of countries in the world expert and scholar at present, become one of focus of current biodegradable plastic research.
At present, various PBAT alloy resin patent emerges in an endless stream, its Application Areas is also in continuous expansion, but for now, special PBAT preservative film patent is actually rare, and the more traditional PE resin price of current pure PBAT resin is higher, and its Kekelé structure count is poor, be unfavorable for processing, be therefore unfavorable for the popularization in market.Therefore, prepare that a kind of cost performance is high, processing characteristics is good, the material containing PBAT that Kekelé structure count is good and be the problem that the present invention needs solution badly based on the preservative film of this material produce.
Summary of the invention
For above-mentioned prior art, the object of the invention is to prepare that a kind of high strength, high performance-price ratio, processing characteristics are good, Kekelé structure count is good containing the material of PBAT and the preservative film based on this material produce, thus a kind of composition and method of making the same containing PBAT and PBAT preservative film are provided.
To achieve these goals, the invention provides a kind of composition containing PBAT, wherein, PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant should be contained by the composition containing PBAT; With the gross weight of described composition for benchmark, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight.
Present invention also offers a kind of preparation method of the composition containing PBAT, wherein, this preparation method comprises and carries out granulation by after PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant batch mixing; The consumption of each component makes in the composition prepared, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight; Preferably, the content of described PBAT is 78-88 % by weight, and the content of described modified nano calcium carbonate is 7-17 % by weight, and the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.8-1.5 % by weight, and the content of described lubricant is 0.8-1.5 % by weight.
Present invention also offers a kind of PBAT preservative film.
The present invention by adding modified nano calcium carbonate in PBAT, the intensity of material after carrying out Blown Film prepared is greatly improved, simultaneously because of the use of modified nano calcium carbonate, also the cost of product is greatly reduced, improve the cost performance of product, by adding compatilizer in the composition, by means of intermolecular linkage force, PBAT and modified nano calcium carbonate is impelled to combine, make the product stability that obtains higher, also by the use of lubricant, the Kekelé structure count of product is added.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below by way of specific embodiment, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of composition containing PBAT, wherein, PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant should be contained by the composition containing PBAT; With the gross weight of described composition for benchmark, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight.
In the composition, in order to make said composition, there is better physicals and processing characteristics, preferably, with the gross weight of described composition for benchmark, the content of described PBAT is 78-88 % by weight, and the content of described modified nano calcium carbonate is 7-17 % by weight, and the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.8-1.5 % by weight, and the content of described lubricant is 0.8-1.5 % by weight.
In the composition, described PBAT is the multipolymer of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester, and in the present invention, in order to obtain better result of use, preferably, the density of described PBAT is 1.15-1.36g/cm
3, weight-average molecular weight is 50000-80000, and fusing point is 100 DEG C-130 DEG C.
Described compatilizer can be the compatilizer that this area routine uses, in the present invention, in order to make described PBAT and described modified nano calcium carbonate have better consistency, the product that stability is better is obtained, preferably, described compatilizer is ethylene-acrylate-copolymer-maleic anhydride.
Described oxidation inhibitor can be the oxidation inhibitor that this area routine uses, in the present invention, in order to obtained composition has higher antioxidant property, better raising its work-ing life, preferably, described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and/or three (2,4-di-tert-butyl-phenyl) phosphorous acid esters.
Described lubricant can be the lubricant that this area routine uses, in the present invention, in order to make the material that obtains better through Blown Film aft opening, use properties is better in actual use, preferably, described lubricant is one or more in EBS, erucicamide, amine hydroxybenzene and Zinic stearas.
In the composition, in order to improve the hardness of described composition, also added modified nano calcium carbonate in the present invention, described modified nano calcium carbonate is under agitation, nano-calcium carbonate and properties-correcting agent is carried out mixing obtaining.That is, described modified nano calcium carbonate contains properties-correcting agent and calcium carbonate.The temperature of described mixing can be 10-35 DEG C.In the present invention, in order to make modified nano-calcium carbonate have better result of use, described properties-correcting agent be preferably in stearic acid, sodium stearate, calcium stearate, Zinic stearas and silane coupling agent one or more; In order to make nano-calcium carbonate carry out optimized modification, preferably, with the nano-calcium carbonate of 100 weight parts for benchmark, the content of described properties-correcting agent is 0.1-1 weight part.In the present invention, described nano-calcium carbonate is the granular size that this area routine uses is nano level calcium carbonate.
Present invention also offers a kind of preparation method of the composition containing PBAT, wherein, this preparation method comprises and carries out granulation by after PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant batch mixing; The consumption of each component makes in the composition prepared, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight; Preferably, the content of described PBAT is 78-88 % by weight, and the content of described modified nano calcium carbonate is 7-17 % by weight, and the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.8-1.5 % by weight, and the content of described lubricant is 0.8-1.5 % by weight.
In described preparation method, described PBAT, described compatilizer, described oxidation inhibitor, described lubricant and described modified nano calcium carbonate all with describe above identical.
In described preparation method, preferably, the method for described batch mixing comprises: by described PBAT and the mixing of described modified nano calcium carbonate, then mixed with described compatilizer, described oxidation inhibitor and described lubricant by the mixture obtained.
In described preparation method, in order to make the composition of preparation have better processing characteristics, preferably, before the method is also included in batch mixing, described PBAT and described modified nano calcium carbonate are carried out drying treatment, and the temperature of described drying treatment is 70-85 DEG C, and the time is 1-3 hour.
In described preparation method, preferably, described granulation process carries out in twin screw extruder, and the L/D ratio of described twin screw extruder is 40-50:1, and the temperature of described twin screw extruder is 120-140 DEG C.
Present invention also offers a kind of PBAT preservative film, wherein, described preservative film be obtained by above-mentioned preparation method carry out Blown Film containing the composition of PBAT and obtain.
In the preparation process of described mulch film, preferably, described method also comprises carries out blow molding by the described composition containing PBAT, described blow-molding process carries out in single screw extrusion machine, the length of described single screw extrusion machine and diameter are than being 20-35:1, and the temperature of described single screw extrusion machine is 120-140 DEG C.Under preferable case, before blow-molding process, also comprise and the particulate material obtained after granulation is carried out drying treatment, the temperature of described drying treatment is 50-70 DEG C, and the time is 3-5 hour.
The preferred preparation method of one according to PBAT preservative film a kind of in the present invention comprises:
(1) be 70-85 DEG C by described PBAT and described modified nano calcium carbonate in temperature, the time is carry out drying treatment under the condition of 1-3 hour;
(2) the described PBAT after process and described modified nano calcium carbonate are mixed with described compatilizer, described oxidation inhibitor and described lubricant, obtain mixture;
(3) be 40-50:1 by the mixture obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 120-140 DEG C carries out granulation, obtains particulate matter;
(4) be 50-70 DEG C by the particulate matter obtained in temperature, the time is carry out drying treatment under the condition of 3-5 hour;
(5) dried particulate matter compared for 20-35:1 by length and diameter, extrusion die temperature is that the single screw extrusion machine of 120-140 DEG C carries out Blown Film.
Below by way of specific embodiment, the invention will be further described.
Need to illustrate, in an embodiment of the present invention, described PBAT is poly-hexanodioic acid and the butylene terephthalate multipolymer of the prosperous rich medicine company production in Zhejiang, and the density of described PBAT is 1.15-1.36g/cm
3, weight-average molecular weight is 50000-80000, and fusing point is 100 DEG C-130 DEG C, and the ethylene-acrylate-copolymer-maleic anhydride of described compatilizer to be the trade mark of commercially available routine be EMH4210, described EBS is the ethylenebisstearamide that this area routine uses.
Embodiment 1
By the modified nano calcium carbonate (modified nano calcium carbonate is that the calcium stearate of the nano-calcium carbonate of 21.85 weight parts and the stearic acid of 0.1 weight part and 0.05 weight part carries out being mixed to get at 25 DEG C) of the PBAT of 73 weight parts and 22.2 weight parts at 75 DEG C dry 1.5 hours; With the EMH4210 of 2 weight parts, four [β-(3 of 1.3 weight parts after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 5-di-tert-butyl-hydroxy phenyl) propionic acid] EBS of pentaerythritol ester and 1.5 weight parts mixes, and obtains mixture M 1 after mixing; Be 45:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 125 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 55 DEG C dry 3.5 hours; Compared for 30:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 120 DEG C carries out Blown Film, obtains PBAT preservative film.
Embodiment 2
By the modified nano calcium carbonate (modified nano calcium carbonate is that the nano-calcium carbonate of 18.6 weight parts and the sodium stearate of 0.1 weight part carry out being mixed to get at 25 DEG C) of the PBAT of 78 weight parts and 17.4 weight parts at 70 DEG C dry 2 hours; With the EMH4210 of 2.5 weight parts, three (2 of 0.8 weight part after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 4-di-tert-butyl-phenyl) phosphorous acid ester, the erucicamide of 0.5 weight part and 0.8 weight part amine hydroxybenzene mix, and obtains mixture M 1 after mixing; Be 40:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 135 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 70 DEG C dry 4.5 hours; Compared for 20:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 135 DEG C carries out Blown Film, obtains PBAT preservative film.
Embodiment 3
By the modified nano calcium carbonate (modified nano calcium carbonate is that the nano-calcium carbonate of 12.12 weight parts and the Zinic stearas of 0.08 weight part carry out being mixed to get at 25 DEG C) of the PBAT of 83 weight parts and 12.2 weight parts at 85 DEG C dry 1 hour; With the EMH4210 of 2.5 weight parts, three (2 of 1.5 weight parts after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 4-di-tert-butyl-phenyl) Zinic stearas of phosphorous acid ester, the EBS of 0.2 weight part, the erucicamide of 0.2 weight part, the amine hydroxybenzene of 0.2 weight part and 0.2 weight part mixes, and obtains mixture M 1 after mixing; Be 50:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 120 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 65 DEG C dry 3 hours; Compared for 25:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 125 DEG C carries out Blown Film, obtains PBAT preservative film.
Embodiment 4
By the modified nano calcium carbonate (modified nano calcium carbonate is that the nano-calcium carbonate of 8.45 weight parts and the stearic acid of 0.05 weight part carry out being mixed to get at 25 DEG C) of the PBAT of 86.5 weight parts and 8.5 weight parts at 80 DEG C dry 3 hours; With the EMH4210 of 3 weight parts, four [β-(3 of 0.5 weight part after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.6 weight part three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, the amine hydroxybenzene of 0.4 weight part and the Zinic stearas of 0.5 weight part mix, and obtains mixture M 1 after mixing; Be 43:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 140 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 50 DEG C dry 5 hours; Compared for 35:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 130 DEG C carries out Blown Film, obtains PBAT preservative film.
Embodiment 5
By the modified nano calcium carbonate (modified nano calcium carbonate is that the nano-calcium carbonate of 5.27 weight parts and the calcium stearate of 0.03 weight part carry out being mixed to get at 25 DEG C) of the PBAT of 90 weight parts and 5.3 weight parts at 70 DEG C dry 2.5 hours; With the EMH4210 of 3 weight parts, four [β-(3 of 0.8 weight part after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 5-di-tert-butyl-hydroxy phenyl) propionic acid] erucicamide of pentaerythritol ester and 0.9 weight part mixes, and obtains mixture M 1 after mixing; Be 40:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 130 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 70 DEG C dry 4 hours; Compared for 30:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 135 DEG C carries out Blown Film, obtains PBAT preservative film.
Comparative example 1
By the PBAT of 95.3 weight parts at 70 DEG C dry 2.5 hours; With the EMH4210 of 3 weight parts, four [β-(3 of 0.8 weight part after cooling under above-mentioned dried PBAT being placed in room temperature condition, 5-di-tert-butyl-hydroxy phenyl) propionic acid] erucicamide of pentaerythritol ester and 0.9 weight part mixes, and obtains mixture M 1 after mixing; Be 40:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 130 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 70 DEG C dry 4 hours; Compared for 30:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 135 DEG C carries out Blown Film, obtains PBAT preservative film.This comparative example is consistent with the preparation method of embodiment 5, and unique difference is that the content of PBAT in this comparative example is different from embodiment 5 and not containing modified nano calcium carbonate in this comparative example.
Comparative example 2
By the modified nano calcium carbonate (modified nano calcium carbonate is that the calcium stearate of the nano-calcium carbonate of 21.85 weight parts and the stearic acid of 0.1 weight part and 0.05 weight part carries out being mixed to get at 25 DEG C) of the PBAT of 50 weight parts and 45.2 weight parts at 75 DEG C dry 1.5 hours; With the EMH4210 of 2 weight parts, four [β-(3 of 1.3 weight parts after cooling under above-mentioned dried PBAT and modified nano calcium carbonate being placed in room temperature condition, 5-di-tert-butyl-hydroxy phenyl) propionic acid] EBS of pentaerythritol ester and 1.5 weight parts mixes, and obtains mixture M 1 after mixing; Be 45:1 by the mixture M 1 obtained by L/D ratio, extrusion die temperature is that the twin screw extruder of 125 DEG C carries out granulation, obtains granular hybrid resin M2; By M2 at 55 DEG C dry 3.5 hours; Compared for 30:1 by length and diameter by dried M2, extrusion die temperature is that the single screw extrusion machine of 120 DEG C carries out Blown Film, obtains PBAT preservative film.This comparative example is consistent with the preparation method of embodiment 1, and unique difference is that the content of PBAT and modified nano calcium carbonate in this comparative example is different from embodiment 1.
Test case:
GB/T1040.2-2006 is utilized to detect tensile strength and the elongation at break of PBAT preservative film obtained in above-described embodiment 1-5 and comparative example 1 and 2 respectively, utilize GB/T16578.1-2008 to detect the tear strength of PBAT preservative film obtained in above-described embodiment 1-5 and comparative example 1 and 2 respectively, the detection data obtained are as shown in table 1:
Table 1:
As shown in Table 1, under the condition adding 2-3 part compatilizer, in a scope, by adding modified nano calcium carbonate in PBAT, the tensile strength of the PBAT preservative film prepared, tear strength and elongation at break are had significantly improve, simultaneously adding because of compatilizer, greatly improve rigidity nanoparticle CaCO
3with the consistency of PBAT, improve the mechanical property of composition, by finding out with contrasting of comparative example, the preservative film that the composition proportion outside the scope of the invention obtains, its physicals is well below preservative film prepared in accordance with the present invention.Make the PBAT preservative film range of application of preparation more extensive, more practical.
Below describe the preferred embodiment of the present invention in detail in conjunction with the embodiments; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the composition containing PBAT, is characterized in that, should be made up of PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant by the composition containing PBAT; With the gross weight of described composition for benchmark, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight; Wherein,
Described PBAT is the multipolymer of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester, and the density of described PBAT is 1.15-1.36g/cm
3, weight-average molecular weight is 50000-80000, and fusing point is 100 DEG C-130 DEG C;
Described compatilizer is ethylene-acrylate-copolymer-maleic anhydride;
Described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and/or three (2,4-di-tert-butyl-phenyl) phosphorous acid esters;
Described lubricant is one or more in EBS, erucicamide, amine hydroxybenzene and Zinic stearas.
2. composition according to claim 1, wherein, with the gross weight of described composition for benchmark, the content of described PBAT is 78-88 % by weight, the content of described modified nano calcium carbonate is 7-17 % by weight, the content of described compatilizer is 2-3 % by weight, and the content of described oxidation inhibitor is 0.8-1.5 % by weight, and the content of described lubricant is 0.8-1.5 % by weight.
3. composition according to claim 1 and 2, wherein, described modified nano calcium carbonate contains nano-calcium carbonate and properties-correcting agent, and described properties-correcting agent is one or more in stearic acid, sodium stearate, calcium stearate, Zinic stearas and silane coupling agent; With the nano-calcium carbonate of 100 weight parts for benchmark, the content of described properties-correcting agent is 0.1-1 weight part.
4. the preparation method of composition containing PBAT, is characterized in that, this preparation method comprises and carries out granulation by after PBAT, modified nano calcium carbonate, compatilizer, oxidation inhibitor and lubricant batch mixing; The consumption of each component makes in the composition prepared, the content of described PBAT is 73-95 % by weight, the content of described modified nano calcium carbonate is 0.1-22 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.1-2 % by weight, and the content of described lubricant is 0.1-2 % by weight; Wherein,
Described PBAT is the multipolymer of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester, and the density of described PBAT is 1.15-1.36g/cm
3, weight-average molecular weight is 50000-80000, and fusing point is 100 DEG C-130 DEG C;
Described compatilizer is ethylene-acrylate-copolymer-maleic anhydride;
Described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and/or three (2,4-di-tert-butyl-phenyl) phosphorous acid esters;
Described lubricant is one or more in EBS, erucicamide, amine hydroxybenzene and Zinic stearas.
5. preparation method according to claim 4, wherein, the content of described PBAT is 78-88 % by weight, the content of described modified nano calcium carbonate is 7-17 % by weight, the content of described compatilizer is 2-3 % by weight, the content of described oxidation inhibitor is 0.8-1.5 % by weight, and the content of described lubricant is 0.8-1.5 % by weight.
6. preparation method according to claim 4, wherein, described modified nano calcium carbonate contains nano-calcium carbonate and properties-correcting agent, and described properties-correcting agent is one or more in stearic acid, sodium stearate, calcium stearate, Zinic stearas and silane coupling agent; With the nano-calcium carbonate of 100 weight parts for benchmark, the content of described properties-correcting agent is 0.1-1 weight part.
7. preparation method according to claim 4, wherein, the method for described batch mixing comprises: by described PBAT and the mixing of described modified nano calcium carbonate, then mixed with described compatilizer, described oxidation inhibitor and described lubricant by the mixture obtained.
8. preparation method according to claim 7, wherein, before the method is also included in batch mixing, carries out drying treatment by described PBAT and described modified nano calcium carbonate, and the temperature of described drying treatment is 70-85 DEG C, and the time is 1-3 hour.
9. preparation method according to claim 4, wherein, described granulation process carries out in an extruder, and the L/D ratio of described forcing machine is 40-50:1, and the temperature of described forcing machine is 120-140 DEG C.
10. a PBAT preservative film, is characterized in that, the composition containing PBAT that described preservative film contains the composition containing PBAT in claim 1-3 described in any one or prepared by the method in claim 4-9 described in any one.
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| CN113861637B (en) * | 2021-11-24 | 2024-03-12 | 重庆科聚孚新材料有限责任公司 | PBAT composite material prepared by using dark catalyst and preparation method thereof |
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