CN116731494A - Degradable instant foaming film and preparation method and application method thereof - Google Patents
Degradable instant foaming film and preparation method and application method thereof Download PDFInfo
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- CN116731494A CN116731494A CN202310504475.3A CN202310504475A CN116731494A CN 116731494 A CN116731494 A CN 116731494A CN 202310504475 A CN202310504475 A CN 202310504475A CN 116731494 A CN116731494 A CN 116731494A
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- 238000005187 foaming Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 121
- 230000015556 catabolic process Effects 0.000 claims abstract description 64
- 238000006731 degradation reaction Methods 0.000 claims abstract description 64
- 239000000155 melt Substances 0.000 claims abstract description 20
- 239000002667 nucleating agent Substances 0.000 claims abstract description 19
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000010096 film blowing Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000004088 foaming agent Substances 0.000 abstract description 4
- 239000005022 packaging material Substances 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 26
- 238000005520 cutting process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229920001896 polybutyrate Polymers 0.000 description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 5
- 239000005457 ice water Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000000265 homogenisation Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N Benzoic acid Natural products OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000008380 degradant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- FXDGCBFGSXNGQD-UHFFFAOYSA-L disodium;bicyclo[2.2.1]heptane-2,3-dicarboxylate Chemical compound [Na+].[Na+].C1CC2C(C([O-])=O)C(C(=O)[O-])C1C2 FXDGCBFGSXNGQD-UHFFFAOYSA-L 0.000 description 1
- UVCJGUGAGLDPAA-UHFFFAOYSA-N ensulizole Chemical compound N1C2=CC(S(=O)(=O)O)=CC=C2N=C1C1=CC=CC=C1 UVCJGUGAGLDPAA-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000520 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymers 0.000 description 1
- 229920002463 poly(p-dioxanone) polymer Polymers 0.000 description 1
- 229920009537 polybutylene succinate adipate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0264—Polyester
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/56—Damping, energy absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/716—Degradable
- B32B2307/7163—Biodegradable
-
- 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
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- 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
-
- 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
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
-
- 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
Abstract
The invention relates to the technical field of foaming materials (IPC (industrial personal computer) classification number is C08J 5/18), in particular to a degradable instant foaming film, a preparation method and a use method thereof, wherein the foaming film comprises the following preparation raw materials in parts by weight: a) 10-20 parts of a first degradation material; b) 15-25 parts of a second degradation material; c) 40-70 parts of a third degradation material; d) 10-20 parts of nucleating agent; e) 0.05-0.3 parts of lubricant; the melt index of the first degradation material is 1-4g/10min, the melt index of the second degradation material is 0.5-2g/10min, and the melt index of the third degradation material is 1-4g/10min. The invention has the core characteristics that the foaming is carried out immediately when the foaming agent is used and is in a stable storage state when the foaming agent is not used, so that the excellent buffering effect of products is ensured, the problems of large transportation volume, high transportation cost, large storage space, large investment of foaming equipment, production danger and the like of the foaming packaging material are perfectly solved, and the foaming agent is a single-component biodegradable material which does not need pressurization and can realize normal-temperature instant foaming in the first period in the prior art.
Description
Technical Field
The invention relates to the technical field of foaming materials (IPC (industrial personal computer) classification number is C08J 5/18), in particular to a degradable instant foaming film and a preparation method and a use method thereof.
Background
The foaming material is a novel packaging material capable of reducing vibration and absorbing vibration, has wide application in logistics transportation and product packaging, and mainly comprises sponge, pearl wool, boli dragon and the like. The main raw material of the pearl cotton is polyethylene with low high-pressure density, has good flexibility and elasticity, breaks through the characteristics of fragile foam, poor restorability and the like, and the Baolilong is a material formed by foaming polystyrene at high temperature after adding a foaming agent, has light weight, heat insulation, sound absorption, vibration prevention and corrosion resistance, and is widely used as a heat insulation, sound insulation, packaging material, a car and boat shell and the like.
The biggest pain of the market demand at present is that the foam material is light but large in size, a large amount of space is occupied for storage, transportation is extremely inconvenient, and the cost of storage and transportation even exceeds the production cost, and Chinese patent CN113308016B discloses a foam film based on a composite antibacterial nano material and a preparation method thereof. In the prior art, no product which can be completely rolled and stored when not used and foamed in situ when used is developed, so that the development of the foaming film capable of realizing instant foaming has extremely high application value.
Disclosure of Invention
The invention provides a degradable instant foaming film, which is prepared from the following raw materials in parts by weight:
a) 10-20 parts of a first degradation material;
b) 15-25 parts of a second degradation material;
c) 40-70 parts of a third degradation material;
d) 10-20 parts of nucleating agent;
e) 0.05-0.3 parts of lubricant;
the melt index of the first degradation material is 1-4g/10min, the melt index of the second degradation material is 0.5-2g/10min, and the melt index of the third degradation material is 1-4g/10min.
Further, the relative molecular weight of the first degradation material is 4-6 ten thousand, the relative molecular weight of the second degradation material is 6-8 ten thousand, and the relative molecular weight of the third degradation material is 6-8 ten thousand.
The invention selects the material with high molecular weight and low melting value, and discovers that the specific melting value and molecular weight combination can reduce the degradation speed of the foaming film and improve the shelf life on one hand, and the material with low melting value can provide larger melt strength on the other hand, thereby meeting the requirements of the blowing film process with high blowing ratio. However, the invention requires that the melt value is not lower and better, the melt value is too lower and the fluidity is too poor, the extrusion back pressure and the production temperature of a machine table can be increased, the shearing temperature of a foaming film is increased, the degradation speed is further increased, and the melt value is too high, so that the stability of the film bubble is poor, and the problems of unstable film bubble, uneven thickness, wrinkles and the like can occur under the condition of high inflation ratio. After multiple researches, only the melting value range of 0.5-4g/10min can keep better melt strength and is beneficial to plasticization.
Further, the melt index of the first degradation material is 1-2g/10min, the melt index of the second degradation material is 0.5-1g/10min, and the melt index of the third degradation material is 1-2g/10min.
The test conditions of the melt index of the invention are 190 ℃/2.16kg.
In some embodiments, the first, second, and third degradants are each independently selected from at least one of PPC, PBAT, PLA, PGA, PHA, PHB, PVA, PEC, PLC, PBS, PHBV, PBSA, PPDO.
In order to improve the film blowing performance, the first degradation material, the second degradation material and the third degradation material are respectively and independently selected from at least one of PPC, PBAT, PLA, PGA, PHA, preferably at least one of PPC, PBAT, PLA, most preferably the first degradation material is PLA, preferably the source is Nature works of America, the brand is 4060, the second degradation material is PBAT, preferably the source is Xinjiang Tuhe, the brand is 801T, the third degradation material is PPC, preferably the source is Boda east, and the brand is T1.
PPC has good barrier properties but high viscosity and slow crystallization speed, and applicant found that by mixing PPC, PBAT, PLA in a specific ratio, rapid cooling crystallization can be achieved in a bulk system, and the prepared material has good film blowing properties, especially at a blow-up ratio of 2.8-3.5. Generally, the higher the transverse tensile strength is, the worse the stability of the film bubble is, but under the coordination of the three plastics, the film blowing effect is extremely strong, and the film can be greatly transversely stretched under the condition of far exceeding the blowing ratio of the prior art.
In some embodiments, the water content of the nucleating agent is not greater than 0.4%.
In some embodiments, the nucleating agent has a fineness of 2500 to 3500 mesh.
Further, the nucleating agent comprises at least one of talcum powder, calcium carbonate, titanium dioxide, barium sulfate, ultra-high molecular weight polyethylene, potassium hydrogen phthalate, benzoic acid compound, sodium benzoate compound and disodium bicyclo [2.2.1] heptane-2, 3-diformate.
The nucleating agent is preferably talcum powder, the preferential source is iloceae, the brand T3000, the whiteness is 97%, and the fineness is 3000 meshes. The addition of talcum powder with specific particle size can improve the processing performance of the material, reduce the resistance of the material in a double-screw machine and a subsequent film blowing machine, reduce the processing temperature, reduce the degradation of the material in a subsequent modification section, and improve the production capacity, and on the other hand, the applicant has unexpectedly found that the talcum powder can improve the crystallization rate of the material, increase the barrier property of a film, and particularly reduce the viscosity of the PPC after film formation. The smoothness of the film can be improved by the specific particle size, and the roughness of the film can be increased due to the excessively large or excessively small particle size, so that the film is difficult to process.
In some embodiments, the lubricant comprises at least one of oleamide, a mesogenic amide, zinc stearate, ethylene bis-stearamide, polyethylene wax, pentaerythritol stearate.
The lubricant of the present invention is preferably oleamide in view of economical efficiency and compatibility of the system.
The second aspect of the invention provides a preparation method of a degradable instant foaming film, which comprises the following steps:
s1, preheating by a stirrer, adding a nucleating agent and a lubricant according to weight, mixing and stirring for 3-10min;
s2, continuously adding the first degradation material, the second degradation material and the third degradation material according to the weight, heating, mixing and stirring for 3-10min at the temperature of 80+/-5 ℃ to obtain a mixture;
s3, putting the mixture into a hopper, and heating and stirring to obtain a modified material;
s4, bracing the modified material, cooling, granulating, homogenizing and packaging to obtain a pre-foaming material;
s5, putting the pre-foaming material into a single-screw film blowing machine, and heating and blowing a film to obtain a foaming film;
s6, standing the foaming film at normal temperature, and then, using the foaming film for instant foaming.
In some embodiments, the temperature of the heating and stirring in S3 is set as follows:
and (3) feeding: 70-80 ℃;
heating section 1:120-130 ℃;
heating sections 2-6:140-150 ℃;
extrusion section: 110-130 ℃;
and (3) a die head: 110-130 ℃.
The temperature of the heating and stirring in the step S3 is further set as follows:
and (3) feeding: 80 ℃;
heating section 1:120-130 ℃;
heating sections 2-6:150 ℃;
extrusion section: 120 ℃;
and (3) a die head: 120 ℃.
In some embodiments, the cooling in S4 is performed by bracing the modified material and then placing the material in ice water at 0-5 ℃.
The PPC material has low cooling speed and is extremely easy to absorb water, and the time for placing the modified material in ice water at 0-5 ℃ after bracing is 1-2s in order to improve cooling efficiency and inhibit PPC water absorption to the greatest extent.
In some embodiments, the temperature of the S5 heated blown film is set as follows:
and (3) feeding: 110-130 ℃;
heating sections 1-6:150-160 ℃;
extrusion section: 150-160 ℃;
and (3) a die head: 130-150 ℃.
Further, the temperature of the S5 heating blown film is set as follows:
and (3) feeding: 120 ℃;
heating sections 1-6:155 ℃;
extrusion section: 155 ℃;
and (3) a die head: 140 ℃.
By setting the temperature of two sections of specific film blowing and setting the process, the invention does not need to add compatilizer, and can achieve good compatibility effect.
In some embodiments, the single screw film blowing machine in S5 has an inflation ratio of 2.8 to 3.5.
In some embodiments, the S5 heating in the blown film increases the blow-up ratio, which in turn increases the stretch orientation of the material in the cross machine direction. The blow-up ratio is one of the control points of the blow-molding process, and too small a blow-up ratio deteriorates the performance strength of the film in the transverse direction. The blowing ratio is too high, the precision requirement on a machine table and the melt strength requirement on the intrinsic color of the material are very high, and the cost and the material selection are easily limited. The blowing ratio in the field is usually 1.2-2.4, the blowing ratio is defined to be 2.8-3.5 in the invention, the winding speed is increased from normal 20-25m/min to 35-40m/min, and the biaxial stretching orientation of the material is greatly improved compared with the normal film blowing process in the transverse and longitudinal directions. On one hand, the overall tensile strength of the material is improved, on the other hand, the compatibility between the materials is greatly improved by biaxial stretching, and the appearance transparency and the trouser strength of the film are the most direct characterization.
The third aspect of the invention provides a use method of the degradable instant foaming film, wherein the periphery of the interlayer of two foaming films is sealed after being coated with foaming glue, a semi-finished product is obtained by rolling, and the semi-finished product can be heated to realize foaming when in use.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is characterized in that the single-component biodegradable material is instantly foamed when in use and is in a stable storage state with high density and low volume when not in use. The single-component biodegradable material not only ensures excellent buffering effect of products, but also perfectly solves the problems of large transportation volume, high transportation cost, large storage space, large investment on foaming equipment, production danger and the like of the foaming packaging material, and is a single-component biodegradable material which does not need pressurization and can realize normal-temperature instant foaming in the first period in the prior art.
2. The preparation material of the invention does not contain compatilizer and chain extender, the raw materials are simple and easy to obtain, the cost is lower, but the film blowing effect of adding the compatilizer and the chain extender can be obtained through a specific film blowing process, and the film blowing material is the first film blowing product without the compatilizer in the prior art.
3. The preparation material provided by the invention has excellent mechanical properties under the conditions of high inflation ratio and larger transverse stretching degree, has a good buffering effect, is not easy to break, can completely replace products such as Baolilong, pearl cotton, bubble films and the like which are large in volume and difficult to transport in the prior art, has extremely small occupied space after being prepared and rolled, extremely high transportation and storage efficiency and remarkably reduces cost.
4. The preparation process of the invention adopts a cold water cooling method originally, solves the problems of long cooling stroke of air cooling equipment, high cost and water cooling to cause the water absorption granulation foaming of the modified material, the conventional water cooling stroke is only 1/10 of that of air cooling, and the ice cooling stroke is only 1/4 of that of conventional water cooling, one of 1/40 of that of air cooling, the contact time with water is short, and the modified material is packaged after being dried by a homogenization bin.
5. The preparation material provided by the invention can be combined with the preparation process, so that the preparation efficiency can be effectively improved, the productivity is improved to 35m/min from 20m/min in the prior art, and extremely high economic benefits are brought to enterprises.
Drawings
FIG. 1 is a foamed film prepared in example 3.
FIG. 2 is a foamed film prepared in comparative example 4.
Detailed Description
Example 1
The first aspect of the embodiment provides a degradable instant foaming film, which is prepared from the following raw materials in parts by weight:
a) 15 parts of a first degradation material;
b) 19.8 parts of a second degradation material;
c) 50 parts of a third degradation material;
d) 15 parts of a nucleating agent;
e) 0.2 parts of a lubricant;
the first degradation material is PLA, the melt index is 1-2g/10min, the relative molecular weight is 4-6 ten thousand, the second degradation material is PBAT, the melt index is 0.5-1g/10min, the relative molecular weight is 6-8 ten thousand, the third degradation material is PPC, the melt index is 1-2g/10min, and the relative molecular weight is 6-8 ten thousand.
The nucleating agent is talcum powder, the whiteness is 97%, the fineness is 3000 meshes, and the water content is not higher than 0.4%.
The lubricant is oleamide.
A second aspect of the present embodiment provides a method for preparing a degradable instant foaming film, the method comprising the steps of:
s1, preheating to 85 ℃ by a stirrer, adding a nucleating agent and a lubricant according to weight, mixing and stirring for 5min;
s2, continuously adding the first degradation material, the second degradation material and the third degradation material according to the weight, heating, mixing and stirring for 5min at 80+/-5 ℃ to obtain a mixture;
s3, putting the mixture into a hopper, heating and stirring to obtain a modified material, wherein the temperature is set as follows:
and (3) feeding: 80 ℃;
heating section 1:125 ℃;
heating sections 2-6:150 ℃;
extrusion section: 120 ℃;
and (3) a die head: 120 ℃.
S4, placing the modified material in ice water at the temperature of 0 ℃ for cooling for 2s after bracing, granulating, drying at the temperature of 60 ℃ for 30min for homogenization, and packaging by using a nylon inner bag to obtain a pre-foaming material;
s5, putting the pre-foaming material into a single-screw film blowing machine, wherein the blowing ratio is 3.2, the longitudinal winding speed is 55m/min, heating and blowing the film, and the temperature is set as follows to obtain a foaming film;
and (3) feeding: 120 ℃;
heating sections 1-6:155 ℃;
extrusion section: 155 ℃;
and (3) a die head: 140 ℃;
s6, standing the foaming film at normal temperature for 7 days, and cutting the foaming film into two foaming films with the same shape and area by a cutting machine for instant foaming.
The third aspect of the embodiment provides a use method of the degradable instant foaming film, wherein the periphery of the interlayer of the two foaming films is sealed after the foaming glue is coated, a semi-finished product is obtained by rolling, and foaming can be achieved by heating the semi-finished product when the degradable instant foaming film is used.
Example 2
The first aspect of the present embodiment provides a degradable instant foaming film, and the specific embodiment is the same as example 1, wherein the foaming film comprises the following preparation raw materials in parts by weight:
a) 10 parts of a first degradation material;
b) 15 parts of a second degradation material;
c) 40 parts of a third degradation material;
d) 10 parts of a nucleating agent;
e) 0.05 parts of a lubricant;
a second aspect of the present embodiment provides a method for preparing a degradable instant foaming film, the method comprising the steps of:
s1, preheating to 85 ℃ by a stirrer, adding a nucleating agent and a lubricant according to weight, mixing and stirring for 3min;
s2, continuously adding the first degradation material, the second degradation material and the third degradation material according to the weight, heating, mixing and stirring for 3min at 80+/-5 ℃ to obtain a mixture;
s3, putting the mixture into a hopper, heating and stirring to obtain a modified material, wherein the temperature is set as follows:
and (3) feeding: 70 ℃;
heating section 1:120 ℃;
heating sections 2-6:140 ℃;
extrusion section: 110 ℃;
and (3) a die head: 110 ℃.
S4, placing the modified material in ice water at 5 ℃ for cooling for 1.5 seconds after bracing, granulating, drying at 60 ℃ for 30 minutes for homogenization, and packaging by using a nylon inner bag to obtain a pre-foaming material;
s5, putting the pre-foaming material into a single-screw film blowing machine, wherein the blowing ratio is 2.8, heating and blowing the film, and setting the temperature as follows to obtain a foaming film;
and (3) feeding: 110 ℃;
heating sections 1-6:150 ℃;
extrusion section: 150 ℃;
and (3) a die head: 130 ℃;
s6, standing the foaming film at normal temperature for 7 days, and cutting the foaming film into two foaming films with the same shape and area by a cutting machine for instant foaming.
In a third aspect of the present embodiment, a method for using a degradable instant foaming film is provided, and the specific embodiment is the same as in embodiment 1.
Example 3
The first aspect of the present embodiment provides a degradable instant foaming film, and the specific embodiment is the same as example 1, wherein the foaming film comprises the following preparation raw materials in parts by weight:
a) 20 parts of a first degradation material;
b) 25 parts of a second degradation material;
c) 70 parts of a third degradation material;
d) 20 parts of nucleating agent;
e) 0.3 parts of a lubricant;
a second aspect of the present embodiment provides a method for preparing a degradable instant foaming film, the method comprising the steps of:
s1, preheating to 85 ℃ by a stirrer, adding a nucleating agent and a lubricant according to weight, mixing and stirring for 10min;
s2, continuously adding the first degradation material, the second degradation material and the third degradation material according to the weight, heating, mixing and stirring for 10min at 80+/-5 ℃ to obtain a mixture;
s3, putting the mixture into a hopper, heating and stirring to obtain a modified material, wherein the temperature is set as follows:
and (3) feeding: 75 ℃;
heating section 1:130 ℃;
heating sections 2-6:150 ℃;
extrusion section: 130 ℃;
and (3) a die head: 130 ℃.
S4, placing the modified material in ice water at 3 ℃ for cooling for 2s after bracing, granulating, drying at 60 ℃ for 30min for homogenization, and packaging by using a nylon inner bag to obtain a pre-foaming material;
s5, putting the pre-foaming material into a single-screw film blowing machine, wherein the blowing ratio is 3.5, heating and blowing the film, and setting the temperature as follows to obtain a foaming film;
and (3) feeding: 130 ℃;
heating sections 1-6:160 ℃;
extrusion section: 160 ℃;
and (3) a die head: 150 ℃;
s6, standing the foaming film at normal temperature for 7 days, and cutting the foaming film into two foaming films with the same shape and area by a cutting machine for instant foaming.
In a third aspect of the present embodiment, a method for using a degradable instant foaming film is provided, and the specific embodiment is the same as in embodiment 1.
Comparative example 1
The first aspect of the present comparative example provides a degradable instant foaming film, the specific embodiment is the same as example 1, except that the third degradation material is PHA, purchased from kappaman.
In a second aspect of this comparative example, a method for preparing a degradable instant foaming film is provided, and specific embodiments are the same as in example 1.
A third aspect of this comparative example provides a method of using a degradable instant foaming film, the embodiment being the same as example 1.
Comparative example 2
The first aspect of this comparative example provides a degradable instant foaming film, and the specific embodiment is the same as in example 1, wherein the third degradable material is PGA, purchased from wheatstone technology.
In a second aspect of this comparative example, a method for preparing a degradable instant foaming film is provided, and specific embodiments are the same as in example 1.
A third aspect of this comparative example provides a method of using a degradable instant foaming film, the embodiment being the same as example 1.
Comparative example 3
In a first aspect, the present comparative example provides a degradable instant foaming film, and the specific embodiment is the same as in example 1.
The second aspect of this comparative example provides a method for preparing a degradable instant foaming film, the specific embodiment is the same as example 1, except that the blow-up ratio is 2.0.
A third aspect of this comparative example provides a method of using a degradable instant foaming film, the embodiment being the same as example 1.
Comparative example 4
In a first aspect, the present comparative example provides a degradable instant foaming film, and the specific embodiment is the same as in example 1.
The second aspect of the present comparative example provides a method for preparing a degradable instant foaming film, the specific embodiment is the same as example 1, in that the temperature in S5 is set as follows:
and (3) feeding: 100 ℃;
heating sections 1-6:140 ℃;
extrusion section: 140 ℃;
and (3) a die head: 120 ℃.
A third aspect of this comparative example provides a method of using a degradable instant foaming film, the embodiment being the same as example 1.
Comparative example 5
The first aspect of the comparative example provides a degradable instant foaming film, and specific embodiments are the same as in example 1, wherein the foaming film is prepared from the following raw materials in parts by weight:
a) 0 parts of a first degradation material;
b) 15 parts of a second degradation material;
c) 79.5 parts of a third degradation material;
d) 15 parts of a nucleating agent;
e) 0.05 parts of a lubricant;
in a second aspect of this comparative example, a method for preparing a degradable instant foaming film is provided, and specific embodiments are the same as in example 1.
A third aspect of this comparative example provides a method of using a degradable instant foaming film, the embodiment being the same as example 1.
Performance testing
2 sheets of the foaming films prepared in examples 1-3 and comparative examples 1-4 were selected, the 1 st sheet of the surface was circularly coated with a starch foaming adhesive, the coating gram weight was 80g, then the surface was covered with another sheet of the foaming film, the four sides were heat-sealed, and foaming was performed using an electromagnetic microwave foaming film-removing machine, the microwave output power was 1000w, the microwave frequency was 2.45GHZ, and the heating time was 15S.
The foaming glue and electromagnetic microwave foaming film-removing machine are all from the new material technology Co.Ltd.
The foamed film after foaming was subjected to the following performance test:
water permeability: test methods refer to GB/T1037-1988;
elongation at break: test methods refer to GB/T1040.3-2006;
transverse tensile strength: test methods refer to GB/T1040.3-2006;
foaming effect: testing the foaming density of the film by referring to ASTM D3575, and reversely calculating the expansion multiplying power;
baking at 60 ℃ for one month before foaming: the effect that the foaming multiplying power is influenced due to the water loss of the foaming glue in marine storage is simulated.
In comparative examples 1 and 2, the PPC material was replaced with PHA and PGA, and the film blowing formation was impossible during the experiment because of its excessive rigidity.
In comparative example 3, it was found that the tensile properties of the film were significantly reduced after the reduction of the inflation ratio, and the water vapor transmission rate was also significantly reduced, and this part of properties was directly related to the tensile orientation of the material, and the higher the inflation ratio, the higher the transverse tensile strength of the film, and the better the barrier effect of the film.
In comparative example 4, a large number of crystal points and white lines appear on the film after the film blowing temperature is reduced, PPC in the formula is not completely plasticized, so that the film blowing uniformity is poor, the film water blocking effect is poor, the moisture in the foaming adhesive is lost in baking, and the foaming magnification of the foaming material is obviously reduced.
In comparative example 5, the PPC content was continuously increased to 80%, and because PPC is an amorphous material, it could not be cooled rapidly, resulting in direct adhesion of the cylindrical films together after film blowing, separation, glue spreading and testing at the rear end, and NG determination.
Claims (10)
1. The degradable instant foaming film is characterized by comprising the following raw materials in parts by weight:
a) 10-20 parts of a first degradation material;
b) 15-25 parts of a second degradation material;
c) 40-70 parts of a third degradation material;
d) 10-20 parts of nucleating agent;
e) 0.05-0.3 parts of lubricant;
the melt index of the first degradation material is 1-4g/10min, the melt index of the second degradation material is 0.5-2g/10min, and the melt index of the third degradation material is 1-4g/10min.
2. A degradable instant foaming film according to claim 1, characterized in that the water content of the nucleating agent is not higher than 0.4%.
3. The degradable instant foaming film according to claim 1, wherein the fineness of the nucleating agent is 2500-3500 mesh.
4. A method of producing a degradable instant foaming film according to claim 1, characterized in that the method of producing comprises the steps of:
s1, preheating by a stirrer, adding a nucleating agent and a lubricant according to weight, mixing and stirring for 3-10min;
s2, continuously adding the first degradation material, the second degradation material and the third degradation material according to the weight, heating, mixing and stirring for 3-10min to obtain a mixture;
s3, putting the mixture into a hopper, and heating and stirring to obtain a modified material;
s4, bracing the modified material, cooling, granulating, homogenizing and packaging to obtain a pre-foaming material;
s5, putting the pre-foaming material into a single-screw film blowing machine, and heating and blowing a film to obtain a foaming film;
s6, standing the foaming film at normal temperature, and then, using the foaming film for instant foaming.
5. The method for preparing a degradable instant foaming film according to claim 4, wherein the temperature of heating and stirring in S3 is set as follows:
and (3) feeding: 70-80 ℃;
heating section 1:120-130 ℃;
heating sections 2-6:140-150 ℃;
extrusion section: 110-130 ℃;
and (3) a die head: 110-130 ℃.
6. The method for preparing the degradable instant foaming film according to claim 4, wherein the cooling mode in the step S4 is to bracing the modified material and then placing the bracing material in water at the temperature of 0-5 ℃.
7. The method for preparing a degradable instant foaming film according to claim 4, wherein the temperature of the S5 heating and blowing film is set as follows:
and (3) feeding: 110-130 ℃;
heating sections 1-6:150-160 ℃;
extrusion section: 150-160 ℃;
and (3) a die head: 130-150 ℃.
8. The method for preparing a degradable instant foaming film according to claim 4, wherein the blowing ratio of the single screw film blowing machine in the step S5 is 2.8-3.5.
9. The method for preparing the degradable instant foaming film according to claim 6, wherein the time for pulling the modified material into the water at the temperature of 0-5 ℃ is 1-2s.
10. A method of using a degradable instant foaming film according to any one of claims 1 to 3 or a degradable instant foaming film prepared according to claims 4 to 9, characterized in that the periphery of the two foam films is sealed after the foam glue is coated in the interlayer of the two foam films, and a semi-finished product is obtained by rolling, and the semi-finished product is heated during use to realize foaming.
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