CN102532647A - Photo-biological composite degradable polyethylene foam plastic and preparation method thereof - Google Patents
Photo-biological composite degradable polyethylene foam plastic and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a photo-biological composite degradable polyethylene foam plastic and a preparation method thereof. The plastic comprises the following components in parts by weight: 70-80 parts of low-density polyethylene (LDPE), 3.5-10 parts of foaming agent, 0.5-2.5 parts of crosslinking agent, 20-30 parts of compatilizer, 25-40 parts of modified starch, 15-25 parts of modified calcium carbonate, 2-5 parts of accelerator No.2, 5-8 parts of photodegradable master batch, 50-70 parts of composite inorganic flame retardant and 1-2.5 parts of lubricant. Compared with the prior art, the invention adopts a photo-biological composite degradable polyethylene foam plastic method, so that the waste foam plastic can be recycled after being subjected to photo-biological composite degradation, and thus, is pollution-free and environment-friendly; and the modified foam plastic has the advantages of light weight, high strength and favorable flame retardancy and resistance, can be completely degraded, and is completely applicable to industrialized products. The plastic provided by the invention can be widely used in product packaging, plastic building materials and many other national economy fields.
Description
Technical field
The invention belongs to macromolecule modified and processing technique field, relate to a kind of polyethylene foams and preparation method thereof.
Background technology
Polyethylene foams is widely used in national economy and human lives's all respects because its economy is convenient and good stability, but has also brought " white pollution " of serious harm ecotope simultaneously.Global according to estimates Plastic wastes just accumulate in environment with the speed of annual 4000 ten thousand t, and China is estimated as 2,000,000 t.Vilaterm is linear saturated hydrocarbon, and is structurally similar with paraffin and long chain alkane, but molecular weight is mostly more than 20,000.The biodegradable complexity of Vilaterm is directly relevant with its molecular weight, and the above alkane of side chain and 20 carbon is difficult to by biological degradation.Plastics fully by microbial assimilation, are degraded into CO in soil
2Realize inorganic mineralising with water, need 200～400a time, thereby cause the accumulation in environment.At present, most Vilaterm refuses adopt burning disposal, but can produce a large amount of toxic gases, comprise CO, HCl, NO
x, SO
2Deng.Therefore seek the various degradation pathway of plastics and study its mechanism of degradation, solve because the problem of environmental pollution that plastics cause is extremely urgent.
Poly biological degradation is very slow, and reason is that its molecular weight is excessive, hydrophobicity is strong, and the surface energy of plastics is low excessively.So in order to promote Study of Biodegradation of Common; According to known mechanism of degradation, many modified plasticss have been produced in design, like photodegradable plastics; It adds photosensitizerss such as transition metal complex in macromolecular material; Or introducing-CO ,-photosensitive groups such as CHO, utilize the solar ultraviolet effect to produce radical and make the polymer molecule splitting of chain and cause it to lose physical strength and change structure, thereby reach the degraded purpose; The addition type biodegradable plastic, it is after material with easy microbiological deteriorations such as starch, Mierocrystalline cellulose, lipid acid or utilization carries out the hydrophobisation surface treatment, with polymer blending or be grafted on the polymer molecular chain made.Microorganism secretion such as flavus, streptomycete lytic enzyme can decompose wherein as the starch of carbon source, makes Vilaterm be degraded into small molecules, again by fungi or degradation by bacteria utilization; Development in recent years is light, biodegradable plastic faster, is the one type of novel degradable plastics that has both photodegradation and biological degradation dual-use function.
Adopt the method for light, biological composite degradation polyethylene foams; Make waste plastic pass through light, the recycling capable of circulation of biological composite degradation; Pollution-free environmentally friendly; And this compound fully degraded vinyon cost of development is low, is prone to realize industrialization, is pressing for of Sustainable development, radical cure white pollution.
Summary of the invention
The object of the invention is exactly to provide a kind of for the defective that overcomes above-mentioned prior art existence to have light weight intensity height, fire-retardant fireproof and have polyethylene foams of composite degradation function and preparation method thereof.
The object of the invention can be realized through following technical scheme:
A kind of light, biological composite degradation polyethylene foams comprise following component and parts by weight thereof:
70～80 parts of new LDPE (film grade)s (LDPE)
3.5～10 parts of whipping agents
0.5～2.5 part of linking agent
20～30 parts of compatilizers
25～40 parts of treated starches
15～25 parts of modified calcium carbonates
2～5 parts of promotor No. 2
5～8 parts of photodegradation masterbatch
50～70 parts of composite inorganic fire retardants
1～2.5 part of lubricant
Described whipping agent is selected from Cellmic C 121 (AC), Diisopropyl azodicarboxylate (AIBN), azoformamide potassium formiate (AP), trichlorofluoromethane (F11), Refrigerant 12 (F12), pentamethylene or the iso-pentane.
Described linking agent is selected from 2,5-dimethyl--2,5-two (tert-butyl peroxy base) hexane, peroxo-phenyl-diformyl, Di Cumyl Peroxide 99 (DCP) or cyamelide triallyl.
Described compatilizer is selected from acrylic acid-grafted polypropylene, maleic anhydride grafted polyethylene, ethylene/acrylic acid copolymer (EAA), ethylene/ethyl acrylate multipolymer (EEA), ethylene/acetic acid ethylene copolymer (EVA) or terpolymer EP rubber.
Described treated starch is formed (mass parts): starch 100～110, CMS 2～6, urea 0～4, polycaprolactone 2～5, promotor No. 1 2～5, Viscotrol C ethylene oxide condensate 2～5.
The said relative molecular mass that gathers several lactones is 5000～50000.
Described promotor No. 1 is made up of surface additive and SEPIGEL 305 equivalent, and surface additive is selected from titanate coupling agent, boric acid ester coupler or phosphate coupling agent.
Described modified calcium carbonate is made up of following component and weight part thereof: lime carbonate 100～105, promotor No. 1 2～4, Triple Pressed Stearic Acid 4～8, quicklime 10～20.
Described promotor No. 2 is made up of following component and weight part thereof: 2-dihydroxy benaophenonel photooxidant 60～80, plasticizer DOP 15～30, oxidic polyethylene 30～45.
Described photodegradation masterbatch is made up of following component and weight part thereof: trivalent iron salt photosensitizers 50～60, light trigger 20～40, photooxidant 15～30.
Described composite inorganic fire retardant is made up of white lake and zinc borate, and the mass ratio of white lake and zinc borate is (2～3): 1, and white lake sieves through 500 orders.
Described lubricant is selected from Triple Pressed Stearic Acid, lithium stearate, N, N '-ethylenebis Stearyl Amine or Zinic stearas.
A kind of method for preparing above-mentioned light, biological composite degradation polyethylene foams comprises step:
(1) starch pre-treatment: earlier starch is added high-speed mixer, at 110～130 ℃ of drying 20～30min, to moisture content be about 1%～3%; Add urea and No. 1 part of promotor, blend 8～15min adds CMS; Mix 3～8min, add polycaprolactone part again, mix 2～8min; Be added dropwise to the Viscotrol C ethylene oxide condensate, mix 3～10min and promptly dispose;
(2) lime carbonate pre-treatment: the same with above-mentioned starch pre-treatment, in general high-speed mixer, carry out.Lime carbonate is added in the high-speed mixer, in the time of 80 ℃, add Triple Pressed Stearic Acid, promotor No. 1, quicklime, mixed at high speed 15min;
(3) with LDPE, the above-mentioned treated starch of handling well, modified calcium carbonate, promotor No. 2, ethylene/acrylic acid copolymer, photodegradation masterbatch, composite inorganic fire retardant, Triple Pressed Stearic Acid thorough mixing in low speed mixer, in plasticator about mixing 8～15min, temperature is controlled at 120～130 ℃ again; Treat that plasticizing in flakes; Add whipping agent, be cooled to 80～100 ℃, mixing 12～20min; Add linking agent again, at 80～100 ℃ of mixing 5～10min;
(4) above-mentioned sheet stock of the plasticating mould of packing into, 160～180 ℃ of temperature, pressure 0.3～1.0Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.
Compared with prior art; The present invention adopts the method for light, biological composite degradation polyethylene foams; Make waste plastic foam pass through light, the recycling capable of circulation of biological composite degradation, pollution-free environmentally friendly, and also this modification porous plastics intensity in light weight is high; Fire-retardant fireproof property is good and can degrade fully, is applicable to industrialization product fully.The plastics of this invention can be widely used in numerous national economy fields such as the packing of product, materials for construction.Plastic refuse just accumulates in environment with the speed of annual 4000 ten thousand t according to statistics, if so serious solid waste pollution problem can be accomplished through this composite degradation smoothly, will bring much facilities to the mankind.
Embodiment
Below in conjunction with specific embodiment the present invention is specifically specified.It is important to point out that following examples only further specify with the present invention, rather than to the restriction of protection domain of the present invention.Adopt GB (GB) to measure each item performance of material among the embodiment, if no special instructions, the umber of component is parts by weight.
Embodiment 1
(1) starch pre-treatment: earlier starch is added high-speed mixer, 120 ℃ of dryings 22 minutes, to moisture content be about 2%; 100 parts of starch add 3 parts of 2 parts in urea and promotor No. 1, blend 10min; Add 4 parts of CMSs, mix 5min, add 3 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 5min, be added dropwise to 2 parts of Viscotrol C ethylene oxide condensates, mix 5min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 100 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 5 parts of Triple Pressed Stearic Acid, 3 parts of promotor No. 1,15 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.4 parts of 72 parts of LDPE, 30 parts of the above-mentioned treated starches of handling well, 15 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 24 parts of ethylene/acrylic acid copolymer, 6.3 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 65 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 10min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 5.5 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 15min adds 1.5 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 8min;
(4) with the sheet stock of the plasticating mould of packing into, 170 ℃ of temperature, pressure 0.6Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Embodiment 2
(1) starch pre-treatment: earlier starch is added high-speed mixer, 115 ℃ of dryings 25 minutes, to moisture content be about 2%; 104 parts of starch add 2 parts of 3 parts in urea and promotor No. 1, blend 12min; Add 5 parts of CMSs, mix 7min, add 4 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 5min, be added dropwise to 4 parts of Viscotrol C ethylene oxide condensates, mix 5min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 100 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 4 parts of Triple Pressed Stearic Acid, 3 parts of promotor No. 1,12 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.2 parts of 70 parts of LDPE, 35 parts of the above-mentioned treated starches of handling well, 20 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 25 parts of ethylene/acrylic acid copolymer, 6.5 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 64 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 12min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 5.5 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 18min adds 1.8 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 6min;
(4) with the sheet stock of the plasticating mould of packing into, 165 ℃ of temperature, pressure 0.8Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Embodiment 3
(1) starch pre-treatment: earlier starch is added high-speed mixer, 125 ℃ of dryings 20 minutes, to moisture content be about 2%; 105 parts of starch add 5 parts of 4 parts in urea and promotor No. 1, blend 15min; Add 3 parts of CMSs, mix 5min, add 3 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 8min, be added dropwise to 5 parts of Viscotrol C ethylene oxide condensates, mix 8min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 102 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 5 parts of Triple Pressed Stearic Acid, 4 parts of promotor No. 1,15 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.5 parts of 70 parts of LDPE, 38 parts of the above-mentioned treated starches of handling well, 25 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 25 parts of ethylene/acrylic acid copolymer, 6.5 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 66 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 10min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 5.8 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 15min adds 1.6 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 10min;
(4) with the sheet stock of the plasticating mould of packing into, 175 ℃ of temperature, pressure 0.4Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Embodiment 4
(1) starch pre-treatment: earlier starch is added high-speed mixer, 120 ℃ of dryings 24 minutes, to moisture content be about 2%; 108 parts of starch add 4 parts of 2 parts in urea and promotor No. 1, blend 8min; Add 5 parts of CMSs, mix 6min, add 4 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 5min, be added dropwise to 3 parts of Viscotrol C ethylene oxide condensates, mix 5min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 100 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 6 parts of Triple Pressed Stearic Acid, 4 parts of promotor No. 1,15 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.4 parts of 73 parts of LDPE, 30 parts of the above-mentioned treated starches of handling well, 17 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 28 parts of ethylene/acrylic acid copolymer, 7.8 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 65 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 10min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 5.6 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 18min adds 1.8 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 6min;
(4) with the sheet stock of the plasticating mould of packing into, 170 ℃ of temperature, pressure 0.7Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Embodiment 5
(1) starch pre-treatment: earlier starch is added high-speed mixer, 125 ℃ of dryings 22 minutes, to moisture content be about 2%; 108 parts of starch add 3 parts of 4 parts in urea and promotor No. 1, blend 10min; Add 4 parts of CMSs, mix 8min, add 3 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 4min, be added dropwise to 5 parts of Viscotrol C ethylene oxide condensates, mix 10min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 102 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 5 parts of Triple Pressed Stearic Acid, 3 parts of promotor No. 1,18 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.4 parts of 75 parts of LDPE, 35 parts of the above-mentioned treated starches of handling well, 20 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 28 parts of ethylene/acrylic acid copolymer, 6.6 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 52 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 15min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 8.2 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 15min adds 2.1 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 10min;
(4) with the sheet stock of the plasticating mould of packing into, 165 ℃ of temperature, pressure 0.8Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Embodiment 6
(1) starch pre-treatment: earlier starch is added high-speed mixer, 120 ℃ of dryings 25 minutes, to moisture content be about 2%; 105 parts of starch add 2 parts of 2 parts in urea and promotor No. 1, blend 12min; Add 5 parts of CMSs, mix 8min, add 5 parts of polycaprolactones (relative molecular mass 5000～50000) again; Mix 8min, be added dropwise to 3 parts of Viscotrol C ethylene oxide condensates, mix 6min and promptly get treated starch;
(2) lime carbonate pre-treatment: simultaneously 100 parts in lime carbonate is added in another high-speed mixer, in the time of 80 ℃, add 6 parts of Triple Pressed Stearic Acid, 4 parts of promotor No. 1,15 parts in quicklime, mixed at high speed 15min promptly gets modified calcium carbonate;
(3) 2.5 parts of 74 parts of LDPE, 38 parts of the above-mentioned treated starches of handling well, 25 parts of modified calcium carbonates, promotor No. 2 (by 2-dihydroxy benaophenonel photooxidant, plasticizer DOP, oxidic polyethylene), 30 parts of ethylene/acrylic acid copolymer, 7.5 parts of photodegradation masterbatch, composite inorganic fire retardant (white lake: zinc borate=2.5: 1) 68 parts, 1.5 parts of thorough mixing in low speed mixer of Triple Pressed Stearic Acid; Again in plasticator about mixing 12min; Temperature is controlled at 120～130 ℃, treats that plasticizing in flakes, adds 7.8 parts of blowing agent ACs; Be cooled to 80～100 ℃; Mixing 15min adds 2.4 parts of crosslink agent DCPs again, at 80～100 ℃ of mixing 8min;
(4) with the sheet stock of the plasticating mould of packing into, 180 ℃ of temperature, pressure 0.5Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.Each item performance measurement sees attached list 1.
Comparative example 1
Do not add treated starch in the compound, all the other steps are with embodiment 3, each item performance measurement such as table 1.
Comparative example 2
Do not add the photodegradation masterbatch in the compound, all the other steps are with embodiment 4, each item performance measurement such as table 1.
Comparative example 3
Do not add blowing agent AC in the compound, all the other steps are with embodiment 5, each item performance measurement such as table 1.
Comparative example 4
Do not add composite inorganic fire retardant in the compound, all the other steps are with embodiment 6, each item performance measurement such as table 1.
Subordinate list 1
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. a light, biological composite degradation polyethylene foams, it is characterized in that: its component and parts by weight comprise:
70～80 parts of new LDPE (film grade)s
3.5～10 parts of whipping agents
0.5～2.5 part of linking agent
20～30 parts of compatilizers
25～40 parts of treated starches
15～25 parts of modified calcium carbonates
2～5 parts of promotor No. 2
5～8 parts of photodegradation masterbatch
50～70 parts of composite inorganic fire retardants
1～2.5 part of lubricant.
2. light according to claim 1, biological composite degradation polyethylene foams is characterized in that: described whipping agent is selected from Cellmic C 121, Diisopropyl azodicarboxylate, azoformamide potassium formiate, trichlorofluoromethane, Refrigerant 12, pentamethylene or iso-pentane.
3. light according to claim 1, biological composite degradation polyethylene foams; It is characterized in that: described linking agent is selected from 2; 5-dimethyl--2,5-two (tert-butyl peroxy base) hexane, peroxo-phenyl-diformyl, Di Cumyl Peroxide 99 or cyamelide triallyl.
4. light according to claim 1, biological composite degradation polyethylene foams is characterized in that: described compatilizer is selected from acrylic acid-grafted polypropylene, maleic anhydride grafted polyethylene, ethylene/acrylic acid copolymer, ethylene/ethyl acrylate multipolymer, ethylene/acetic acid ethylene copolymer or terpolymer EP rubber.
5. light according to claim 1, biological composite degradation polyethylene foams, it is characterized in that: described treated starch is made up of following component and weight part thereof: starch 100～110, CMS 2～6, urea 0～4, polycaprolactone 2～5, promotor No. 1 2～5 or Viscotrol C ethylene oxide condensate 2～5.
6. light according to claim 5, biological composite degradation polyethylene foams is characterized in that: the described relative molecular mass that gathers several lactones is 5000～50000; Described promotor No. 1 is made up of surface additive and SEPIGEL 305 equivalent, and surface additive is selected from titanate coupling agent, boric acid ester coupler, phosphate coupling agent.
7. light according to claim 1, biological composite degradation polyethylene foams, it is characterized in that: described modified calcium carbonate is made up of following component and weight part thereof: lime carbonate 100～105, promotor No. 1 2～4, Triple Pressed Stearic Acid 4～8, quicklime 10～20.
8. light according to claim 1, biological composite degradation polyethylene foams is characterized in that: described promotor No. 2 is made up of following component and weight part thereof: 2-dihydroxy benaophenonel photooxidant 60～80, plasticizer DOP 15～30, oxidic polyethylene 30～45; Described photodegradation masterbatch is made up of following component and weight part thereof: trivalent iron salt photosensitizers 50～60, light trigger 20～40, photooxidant 15～30.
9. light according to claim 1, biological composite degradation polyethylene foams; It is characterized in that: described composite inorganic fire retardant is made up of white lake and zinc borate; And the mass ratio of white lake and zinc borate is (2～3): 1, and white lake sieves through 500 orders; Described lubricant is selected from Triple Pressed Stearic Acid, lithium stearate, N, N '-ethylenebis Stearyl Amine or Zinic stearas.
10. method for preparing above-mentioned light, biological composite degradation polyethylene foams is characterized in that: comprise step:
(1) starch pre-treatment: earlier starch is added high-speed mixer, at 110～130 ℃ of drying 20～30min, to moisture content be about 1%～3%; Add urea and promotor No. 1, blend 8～15min adds CMS; Mix 3～8min, add polycaprolactone again, mix 2～8min; Be added dropwise to the Viscotrol C ethylene oxide condensate, mix 3～10min and promptly dispose;
(2) lime carbonate pre-treatment: the same with above-mentioned starch pre-treatment, in general high-speed mixer, carry out.Lime carbonate is added in the high-speed mixer, in the time of 80 ℃, add Triple Pressed Stearic Acid, promotor No. 1, quicklime, mixed at high speed 15min;
(3) with LDPE, the above-mentioned treated starch of handling well, modified calcium carbonate, promotor No. 2, ethylene/acrylic acid copolymer, photodegradation masterbatch, composite inorganic fire retardant, Triple Pressed Stearic Acid thorough mixing in low speed mixer, in plasticator about mixing 8～15min, temperature is controlled at 120～130 ℃ again; Treat that plasticizing in flakes; Add whipping agent, be cooled to 80～100 ℃, mixing 12～20min; Add linking agent again, at 80～100 ℃ of mixing 5～10min;
(4) above-mentioned sheet stock of the plasticating mould of packing into, 160～180 ℃ of temperature, pressure 0.3～1.0Mpa, through 10～12min, blank is taken out in cooling;
(5) pack blank in the foaming molding mold into, under blowing temperature, heating 8～10min makes its expanded foamed moulding again, get final product goods.
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| CN113583333A (en) * | 2021-09-06 | 2021-11-02 | 东莞兆阳兴业塑胶制品有限公司 | Preparation method of degradable foamed shoe material |
| CN113583400A (en) * | 2021-08-27 | 2021-11-02 | 浙江新恒泰新材料有限公司 | Degradable foaming material and preparation method thereof |
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| US11505669B2 (en) | 2015-09-28 | 2022-11-22 | Henkel Ag & Co. Kgaa | Thermally expandable compositions comprising urea derivatives |
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Denomination of invention: Photo-biological composite degradable polyethylene foam plastic and preparation method thereof Effective date of registration: 20191202 Granted publication date: 20140604 Pledgee: Chuzhou economic and Technological Development Corporation Pledgor: Shanghai Jieshijie New Materials (Group) Co., Ltd. Registration number: Y2019980000815 |
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