CN114292511A - Carbon dioxide-based degradable shockproof bubble film and preparation method thereof - Google Patents
Carbon dioxide-based degradable shockproof bubble film and preparation method thereof Download PDFInfo
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- CN114292511A CN114292511A CN202111669443.6A CN202111669443A CN114292511A CN 114292511 A CN114292511 A CN 114292511A CN 202111669443 A CN202111669443 A CN 202111669443A CN 114292511 A CN114292511 A CN 114292511A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 22
- 229920001896 polybutyrate Polymers 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 10
- 238000005469 granulation Methods 0.000 claims abstract description 3
- 230000003179 granulation Effects 0.000 claims abstract description 3
- 238000012986 modification Methods 0.000 claims abstract description 3
- 230000004048 modification Effects 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 2
- PTIXVVCRANICNC-UHFFFAOYSA-N butane-1,1-diol;hexanedioic acid Chemical compound CCCC(O)O.OC(=O)CCCCC(O)=O PTIXVVCRANICNC-UHFFFAOYSA-N 0.000 claims description 2
- JYLRDAXYHVFRPW-UHFFFAOYSA-N butane-1,1-diol;terephthalic acid Chemical compound CCCC(O)O.OC(=O)C1=CC=C(C(O)=O)C=C1 JYLRDAXYHVFRPW-UHFFFAOYSA-N 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 230000015556 catabolic process Effects 0.000 abstract description 7
- 238000006731 degradation reaction Methods 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000010345 tape casting Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 18
- 239000010935 stainless steel Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000013533 biodegradable additive Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 206010016766 flatulence Diseases 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- JQYSLXZRCMVWSR-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione;terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1.O=C1CCCCC(=O)OCCCCO1 JQYSLXZRCMVWSR-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Biological Depolymerization Polymers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of degradable new materials, and particularly relates to a carbon dioxide-based degradable shockproof bubble film and a preparation method thereof. The carbon dioxide-based degradable shockproof bubble film is prepared by mixing 50-70 wt% of PPC and 30-50 wt% of PBAT. The preparation method comprises the following steps: (1) modification and granulation: the raw materials of PPC and PBAT are sucked into a mixer, mixed, plasticized, air-cooled and granulated to obtain a degradable modified mixture; (2) plasticizing and bubble making: adding the degradable modified mixture into a bubble film machine, plasticizing, extruding and casting to form a film, thus obtaining the degradable shockproof bubble film. The carbon dioxide-based degradable shockproof bubble film disclosed by the invention is low in raw material cost, 100% in degradation, green and environment-friendly, adopts one-step molding processes of plasticization, tape casting and bubble absorption, and is excellent in performance.
Description
Technical Field
The invention belongs to the technical field of degradable new materials, and particularly relates to a carbon dioxide-based degradable shockproof bubble film and a preparation method thereof.
Background
The middle layer of the double-layer film is filled with air, has light weight, elasticity and shock resistance, and is widely used for shock resistance buffer packaging of electronics, instruments, ceramics, artware, household appliances, bicycle, kitchens, furniture, paint products, glass products, precision instruments and the like. At present, the shockproof bubble film used in China is a PE product, the degradation time is long, and the ecology is polluted. Therefore, a degradable shockproof bubble film is urgently needed.
Patent CN106566210B discloses a biodegradable bubble film and a preparation method thereof, which comprises the following components in parts by mass: 5-40 parts of polylactic acid, 60-95 parts of poly (butylene adipate-terephthalate), 0.5-2.0 parts of plasticizer, 0.5-2.0 parts of compatilizer, 0.2-0.5 part of chain extender and 0.1-0.5 part of slipping agent; the chain extender is at least one selected from ethylene-methyl acrylate-glycidyl methacrylate terpolymer, diphenylmethane diisocyanate and 1, 3-phenyl-bis (2-oxazoline). In the invention, a plurality of additives are added into the raw material components, the compatibility of the additives and the polymer is poor, and the additives are easy to precipitate in the storage process of the product, so that the performance of the product is reduced, and the appearance is influenced.
Patent CN109294027A provides a compound bubble membrane of degradable high strength, including skin and inlayer, the skin is the protection film, and the inlayer is the bubble membrane, and the bubble membrane comprises following parts by weight raw materials: 42 to 54 portions of polyethylene, 1.3 to 1.8 portions of flame retardant, 0.6 to 1.1 portions of antibacterial agent, 0.5 to 1.2 portions of plasticizer and 2.2 to 4.6 portions of biodegradable additive. The composite membrane is adopted, the preparation is more complicated, the material has degradability by adding the biodegradable additive, on one hand, the addition of the biodegradable additive can influence the performance of the material, on the other hand, the biodegradability brought by the biodegradable additive is limited, and the 100% biodegradation can not be realized.
Disclosure of Invention
The invention mainly solves the technical problems that: the carbon dioxide-based degradable shockproof bubble film is low in raw material cost, 100% in product degradation and environment-friendly; the invention also provides a preparation method thereof, and the degradable shockproof bubble film prepared by adopting the one-step molding process of plasticization, tape casting and bubble formation has excellent performance.
The carbon dioxide-based degradable shockproof bubble film is prepared by mixing 50-70 wt% of PPC and 30-50 wt% of PBAT.
In the invention, the PPC (polymethyl ethylene carbonate) is a polymer synthesized by taking carbon dioxide and propylene oxide as raw materials, is a semi-aromatic carbon dioxide-based copolymer, and has the molecular weight of 20-30 ten thousand. The PPC has the advantages of good barrier property, large viscosity, good film forming property, high molecular weight and degradability.
In the invention, the PBAT is a copolymer synthesized by taking butanediol adipate and butanediol terephthalate as raw materials, and the molecular weight of the PBAT is 10-20 ten thousand. PBAT also has excellent biodegradability.
The preparation method of the carbon dioxide-based degradable shockproof bubble film comprises the following steps:
(1) modification and granulation: the raw materials of PPC and PBAT are sucked into a mixer, mixed, plasticized, air-cooled and granulated to obtain a degradable modified mixture;
(2) plasticizing and bubble making: adding the degradable modified mixture into a bubble film machine, plasticizing, extruding and casting to form a film, thus obtaining the degradable shockproof bubble film.
In the step (1), high-temperature mixing and low-temperature mixing are sequentially carried out during mixing.
Wherein the temperature of the high-temperature mixing is 70-80 ℃, and the time is 15-25 min; mixing at low temperature of 40-50 deg.C for 5-15 min.
During plasticizing, extruder temperature: the heating is divided into four areas, and the temperature is 145-155 ℃; the die zone temperature was 155 ℃.
Preferably, extruder temperature: zone 1 145 ℃, zone 2 150 ℃, zone 3, 150 ℃, zone 4 155 ℃.
And during air cooling, reducing the temperature of the plasticized strand to below 40 ℃ and pelletizing.
As a preferred scheme, the stainless steel spiral feeding machine is adopted for feeding in the step (1), an automatic metering feeder is adopted for feeding, and an 85-square double-granulator is adopted for master batch manufacturing; the flat twin-granulator is used for extruding 10 modified wires with the diameter of 6mm at the speed of 20m per minute through a 160-mesh filter screen at the temperature of 145 ℃, 150 ℃ in a 2 region, 150 ℃ in a 3 region, 155 ℃ in a 4 region and 155 ℃ in a die head region, the modified wires pass through a stainless steel chain with the length of 18m, 6 drying air coolers are arranged on the stainless steel air-cooled chain, the temperature of the modified wires is reduced to 40 ℃, and the modified wires are cut into granules through a gantry type granulator to prepare the degradable modified mixture.
In the step (2), when the bubble film is plasticized, extruded and cast into a film, the temperature of an extruder is as follows: the heating is divided into four areas, and the temperature is 140-150 ℃; die temperature: heating and dividing into four zones, wherein the temperature is 150 ℃; temperature of the foam forming roller: absorbing bubbles on the front layer by adhering to the roller surface at 70 ℃, and adhering to the rear layer to wrap gas to prepare a bubble film; the length-diameter ratio of the screw of the extruder is 30-35: 1.
Preferably, extruder temperature: zone 1 140 ℃, zone 2 145 ℃, zone 3 150 ℃, zone 4 150 ℃.
As a preferred scheme, a bubble film machine is adopted to prepare the bubble film in the step (2), and the parameters of the bubble film machine are set as follows:
the feeding mode is as follows: automatically sucking materials;
length-diameter ratio of screw: 34: 1;
the control mode is as follows: automatic frequency conversion control;
die type: a coat hanger type, wherein a casting die head is blocked;
heating area: four regions, 36 kw;
specification of the soaking roller: 300 x 1200 mm;
the foaming method is as follows: vacuum negative pressure;
flattening mode: bending rollers are 220mm, and 3 strips are formed;
a cooling mode: water cooling;
a sliding roller mode: 47mm, 3 strips;
a winding mode: double-work moment;
metering mode: the PLC changes the roll;
shaft expansion mode: flatulence;
a winding mode: the coil diameter is 1600 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the PPC and PBAT modified materials with specific molecular weight to prepare the bubble film, and ensures that all technical indexes of the bubble film are similar to those of the polyethylene bubble film while endowing the bubble film with excellent degradability, thereby meeting the use requirements;
(2) the carbon dioxide-based degradable shockproof bubble film prepared by the invention returns to the nature after being used, and is 100 percent degraded into carbon dioxide and water in 360 days, so that the shockproof bubble film is green and environment-friendly;
(3) the carbon dioxide-based degradable shockproof air bubble film product prepared by the invention is packaged and stored by an aluminum film, does not deteriorate after being stored in a storehouse for 2 years, and can be degraded into carbon dioxide and water only under the conditions of moisture, temperature and biological bacteria.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples. The raw materials in the examples are all conventional commercial products unless otherwise specified; the operation methods in the examples are conventional methods unless otherwise specified.
Example 1
A carbon dioxide-based degradable shockproof bubble film comprises the following raw materials: 60 wt% PPC (purity 99.9%, molecular weight 30 ten thousand, moisture 0.1%), 40 wt% PBAT (purity 99.9%, molecular weight 20 ten thousand, moisture 0.1%).
The preparation method comprises the following steps:
(1) the PPC and the PBAT with the formula amount are put into a stainless steel high-speed mixer, mixed for 15 minutes at 75 ℃, put into a low-speed mixer, mixed for 10 minutes at 45 ℃ and put into a stainless steel container for standby;
feeding by a stainless steel spiral feeding machine, feeding by an automatic metering feeder, and manufacturing master batches by an 85-inch twin-granulator; the flat twin-granulator is used for extruding 10 modified wires with the diameter of 6mm at the speed of 20m per minute through a 160-mesh filter screen at the temperature of 145 ℃, 150 ℃ in a 2 region, 150 ℃ in a 3 region, 155 ℃ in a 4 region and 155 ℃ in a die head region, cooling the modified wires to 40 ℃ through a stainless steel chain with the length of 18m, cutting the modified wires through a gantry granulator to prepare the degradable modified mixture, wherein the stainless steel chain has 6 drying air coolers.
(2) Adding the carbon dioxide-based degradable modified mixture into a hopper of a bubble film forming machine, plasticizing and extruding, and casting to form a film, wherein the temperature of the extruder is as follows: zone 1 at 140 ℃, zone 2 at 145 ℃, zone 3 at 150 ℃, zone 4 at 150 ℃; die temperature: zone 1 at 150 ℃, zone 2 at 150 ℃, zone 3 at 150 ℃, and zone 4 at 150 ℃; temperature of the foam forming roller: and (4) absorbing bubbles by adhering the front layer to the roller surface at the temperature of 70 ℃, and adhering the rear layer to wrap gas to prepare a bubble film.
The parameters of the bubble film machine are set as follows:
the feeding mode is as follows: automatically sucking materials;
length-diameter ratio of screw: 34: 1;
the control mode is as follows: automatic frequency conversion control;
die type: a coat hanger type, wherein a casting die head is blocked;
heating area: four regions, 36 kw;
specification of the soaking roller: 300 x 1200 mm;
the foaming method is as follows: vacuum negative pressure;
flattening mode: bending rollers are 220mm, and 3 strips are formed;
a cooling mode: water cooling;
a sliding roller mode: 47mm, 3 strips;
a winding mode: double-work moment;
metering mode: the PLC changes the roll;
shaft expansion mode: flatulence;
a winding mode: the coil diameter is 1600 mm.
Example 2
A carbon dioxide-based degradable shockproof bubble film comprises the following raw materials: 50 wt% PPC (purity 99.9%, molecular weight 20 ten thousand, moisture 0.1%), 50 wt% PBAT (purity 99.9%, molecular weight 10 ten thousand, moisture 0.1%).
The preparation method comprises the following steps:
(1) the PPC and the PBAT with the formula amount are put into a stainless steel high-speed mixer, mixed for 15 minutes at 80 ℃, put into a low-speed mixer, mixed for 15 minutes at 40 ℃ and put into a stainless steel container for standby;
feeding by a stainless steel spiral feeding machine, feeding by an automatic metering feeder, and manufacturing master batches by an 85-inch twin-granulator; the flat twin-granulator is used for extruding 10 modified wires with the diameter of 6mm at the speed of 20m per minute through a 160-mesh filter screen at the temperature of 145 ℃, 150 ℃ in a 2 region, 150 ℃ in a 3 region, 155 ℃ in a 4 region and 155 ℃ in a die head region, cooling the modified wires to 40 ℃ through a stainless steel chain with the length of 18m, cutting the modified wires through a gantry granulator to prepare the degradable modified mixture, wherein the stainless steel chain has 6 drying air coolers.
(3) Adding the carbon dioxide-based degradable modified mixture into a hopper of a bubble film forming machine, plasticizing and extruding, and casting to form a film, wherein the temperature of the extruder is as follows: zone 1 at 140 ℃, zone 2 at 145 ℃, zone 3 at 150 ℃, zone 4 at 150 ℃; die temperature: zone 1 at 150 ℃, zone 2 at 150 ℃, zone 3 at 150 ℃, and zone 4 at 150 ℃; temperature of the foam forming roller: and (4) absorbing bubbles by adhering the front layer to the roller surface at the temperature of 70 ℃, and adhering the rear layer to wrap gas to prepare a bubble film.
The parameters of the bubble film machine are set as follows:
the feeding mode is as follows: automatically sucking materials;
length-diameter ratio of screw: 34: 1;
the control mode is as follows: automatic frequency conversion control;
die type: a coat hanger type, wherein a casting die head is blocked;
heating area: four regions, 36 kw;
specification of the soaking roller: 300 x 1200 mm;
the foaming method is as follows: vacuum negative pressure;
flattening mode: bending rollers are 220mm, and 3 strips are formed;
a cooling mode: water cooling;
a sliding roller mode: 47mm, 3 strips;
a winding mode: double-work moment;
metering mode: the PLC changes the roll;
shaft expansion mode: flatulence;
a winding mode: the coil diameter is 1600 mm.
Example 3
A carbon dioxide-based degradable shockproof bubble film comprises the following raw materials: 70 wt% PPC (purity 99.9%, molecular weight 25 ten thousand, moisture 0.1%), 30 wt% PBAT (purity 99.9%, molecular weight 15 ten thousand, moisture 0.1%).
The preparation method comprises the following steps:
(1) the PPC and the PBAT with the formula amount are put into a stainless steel high-speed mixer, mixed for 25 minutes at 70 ℃, put into a low-speed mixer, mixed for 5 minutes at 50 ℃ and put into a stainless steel container for standby;
feeding by a stainless steel spiral feeding machine, feeding by an automatic metering feeder, and manufacturing master batches by an 85-inch twin-granulator; the flat twin-granulator is used for extruding 10 modified wires with the diameter of 6mm at the speed of 20m per minute through a 160-mesh filter screen at the temperature of 145 ℃, 150 ℃ in a 2 region, 150 ℃ in a 3 region, 155 ℃ in a 4 region and 155 ℃ in a die head region, cooling the modified wires to 40 ℃ through a stainless steel chain with the length of 18m, cutting the modified wires through a gantry granulator to prepare the degradable modified mixture, wherein the stainless steel chain has 6 drying air coolers.
(4) Adding the carbon dioxide-based degradable modified mixture into a hopper of a bubble film forming machine, plasticizing and extruding, and casting to form a film, wherein the temperature of the extruder is as follows: zone 1 at 140 ℃, zone 2 at 145 ℃, zone 3 at 150 ℃, zone 4 at 150 ℃; die temperature: zone 1 at 150 ℃, zone 2 at 150 ℃, zone 3 at 150 ℃, and zone 4 at 150 ℃; temperature of the foam forming roller: and (4) absorbing bubbles by adhering the front layer to the roller surface at the temperature of 70 ℃, and adhering the rear layer to wrap gas to prepare a bubble film.
The parameters of the bubble film machine are set as follows:
the feeding mode is as follows: automatically sucking materials;
length-diameter ratio of screw: 34: 1;
the control mode is as follows: automatic frequency conversion control;
die type: a coat hanger type, wherein a casting die head is blocked;
heating area: four regions, 36 kw;
specification of the soaking roller: 300 x 1200 mm;
the foaming method is as follows: vacuum negative pressure;
flattening mode: bending rollers are 220mm, and 3 strips are formed;
a cooling mode: water cooling;
a sliding roller mode: 47mm, 3 strips;
a winding mode: double-work moment;
metering mode: the PLC changes the roll;
shaft expansion mode: flatulence;
a winding mode: the coil diameter is 1600 mm.
Comparative example 1
The comparative example is different from example 1 only in that the carbon dioxide-based degradable shockproof bubble film has the following raw material composition: 80 wt% PPC (purity 99.9%, molecular weight 30 ten thousand, moisture 0.1%), 20 wt% PBAT (purity 99.9%, molecular weight 20 ten thousand, moisture 0.1%).
Comparative example 2
The comparative example is different from example 1 only in that the carbon dioxide-based degradable shockproof bubble film has the following raw material composition: 40 wt% PPC (purity 99.9%, molecular weight 30 ten thousand, moisture 0.1%), 60 wt% PBAT (purity 99.9%, molecular weight 20 ten thousand, moisture 0.1%).
Comparative example 3
Conventional PE plastic bubble films are commercially available.
The degradable shockproof air bubble films prepared in examples 1 to 3 and comparative examples 1 to 2 and the PE plastic air bubble film of comparative example 3 were subjected to performance tests in which tensile strength and elongation at break were tested with reference to astm d683 standard, and the degradation comparative test method was:
the used PE plastic bubble film and the degradable shockproof bubble film are buried in soil, and the degradation rate is calculated after 360 days under the conditions of temperature (15-30 ℃), humidity (natural humidity) and biological bacteria.
The results of the performance tests are shown in table 1.
TABLE 1 comparison of Performance test results
| Item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| A degradation rate% | 100 | 100 | 100 | 100 | 100 | 0 |
| Tensile strength, Mpa | 24.3 | 25.1 | 23.8 | 18.3 | 20.2 | 24.5 |
| Elongation at break,% | 620 | 616 | 625 | 692 | 675 | 622 |
As can be seen from Table 1, under the raw material composition of the invention, the physical properties of the prepared degradable shockproof bubble film are equivalent to those of a PE plastic bubble film, and the degradation rate reaches 100 percent and is far higher than that of a commercially available PE plastic bubble film; when the amount of PPC is too large or too small, the physical properties of the bubble film are reduced and the use requirements cannot be met.
Claims (10)
1. A carbon dioxide base degradable shockproof bubble film is characterized in that: prepared by mixing 50-70 wt% PPC and 30-50 wt% PBAT.
2. The carbon dioxide-based degradable shockproof bubble film according to claim 1, wherein: the PPC is a polymer synthesized by taking carbon dioxide and propylene oxide as raw materials, and the molecular weight of the polymer is 20-30 ten thousand.
3. The carbon dioxide based (PPC) degradable shockproof bubble film of claim 1, wherein: the PBAT is a copolymer synthesized by taking butanediol adipate and butanediol terephthalate as raw materials, and the molecular weight of the PBAT is 10-20 ten thousand.
4. A method for preparing a carbon dioxide based degradable shockproof bubble film according to any one of claims 1-3, which is characterized in that: the method comprises the following steps:
(1) modification and granulation: the raw materials of PPC and PBAT are sucked into a mixer, mixed, plasticized, air-cooled and granulated to obtain a degradable modified mixture;
(2) plasticizing and bubble making: adding the degradable modified mixture into a bubble film machine, plasticizing, extruding and casting to form a film, thus obtaining the degradable shockproof bubble film.
5. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 4, wherein the method comprises the following steps: and (2) sequentially mixing at a high temperature and at a low temperature during mixing in the step (1).
6. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 5, wherein the method comprises the following steps: mixing at high temperature at 70-80 deg.C for 15-25 min; mixing at low temperature of 40-50 deg.C for 5-15 min.
7. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 4, wherein the method comprises the following steps: during plasticizing in the step (1), the temperature of an extruder is as follows: the heating is divided into four areas, and the temperature is 145-155 ℃; the die zone temperature was 155 ℃.
8. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 4, wherein the method comprises the following steps: and (2) during air cooling in the step (1), reducing the temperature of the plasticized strand to below 40 ℃ and pelletizing.
9. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 4, wherein the method comprises the following steps: in the step (2), when the bubble film is plasticized, extruded and cast into a film, the temperature of an extruder is as follows: the heating is divided into four areas, and the temperature is 140-150 ℃; die temperature: heating and dividing into four zones, wherein the temperature is 150 ℃; temperature of the foam forming roller: and (4) absorbing bubbles by adhering the front layer to the roller surface at the temperature of 70 ℃, and adhering the rear layer to wrap gas to prepare a bubble film.
10. The method for preparing the carbon dioxide-based degradable shockproof bubble film according to claim 4, wherein the method comprises the following steps: in the step (2), when the bubble film is plasticized, extruded and cast to form a film, the length-diameter ratio of a screw rod of the extruder is 30-35: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111669443.6A CN114292511B (en) | 2021-12-31 | 2021-12-31 | Carbon dioxide-based degradable shockproof bubble film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107556711A (en) * | 2017-09-28 | 2018-01-09 | 武汉华丽生物股份有限公司 | A kind of degradable buffer packing bag and preparation method thereof |
| CN111890770A (en) * | 2020-08-12 | 2020-11-06 | 中国科学院长春应用化学研究所 | Bubble buffer packaging composite film, preparation method thereof and bubble bag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107556711A (en) * | 2017-09-28 | 2018-01-09 | 武汉华丽生物股份有限公司 | A kind of degradable buffer packing bag and preparation method thereof |
| CN111890770A (en) * | 2020-08-12 | 2020-11-06 | 中国科学院长春应用化学研究所 | Bubble buffer packaging composite film, preparation method thereof and bubble bag |
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