CN1740063B - Biodegradable plastic container and its making process - Google Patents
Biodegradable plastic container and its making process Download PDFInfo
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- CN1740063B CN1740063B CN200410057158A CN200410057158A CN1740063B CN 1740063 B CN1740063 B CN 1740063B CN 200410057158 A CN200410057158 A CN 200410057158A CN 200410057158 A CN200410057158 A CN 200410057158A CN 1740063 B CN1740063 B CN 1740063B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- 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
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Abstract
The present invention provides one kind of biodegradable plastic container and its making process. The biodegradable plastic container is made through mixing dried biodegradable plastic agglomerate, polyolefin resin, premix, dispersing plasticizer, degradation assistant and moisture absorber, and forming the mixture. The making process includes the steps of compounding material, and forming. The biodegradable plastic container is environment friendly, beautiful, durable, simple in making process, and other advantages.
Description
Technical field
The present invention relates to a kind of biodegradable plastics, particularly relate to a kind of biodegradable plastics container and preparation method thereof.
Background technology
At present, disclosed biodegradable plastics goods mainly contain: with film article, foaming product etc., these goods have solved problems such as environmental pollution, raw material are renewable, energy conservation well with, life for cutlery box, agricultural.But produce at present both at home and abroad the plastic container that use as: bucket, bottle, cup, jar great majority are to be made by the polyphosphazene polymer olefin resin, and it still is nondegradable plastic product.
Summary of the invention
The object of the present invention is to provide a kind of biodegradable plastics container; Another object of the present invention is to provide the preparation method of above-mentioned biodegradable plastics container.
To achieve these goals, the present invention realizes with following technical scheme: a kind of biodegradable plastics container, these plastic container by with 100 parts of dried biodegradable plastic base materials and 0～100 part of polyolefin resin, 0～12 part of color masterbatch, 0～3 part of dispersed plasticizer, help that 4～12 parts of 0～2 part of degradation agents, hygroscopic agent mix, moulding obtains, wherein umber is by weight.
Described biodegradable plastic base material is one or both starch-based degradable plastics masterbatch of openly selling on the market, its Main Ingredients and Appearance comprises starch, polyester, modifier, coupling agent, dispersing agent, plasticizer etc., and its preparation method is mainly that starch refinement, dehydration, mixing are plasticated, extrusion molding etc.
Described polyolefin resin is one or both in high density polyethylene (HDPE) (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE) (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), polystyrene (PS), the polyethylene terephthalate (PET).
Described color masterbatch is openly to sell on the market, pigment such as it is green by red, yellow lead, titanium dioxide, titanium cyanines, phthalocyanine blue, carbon black are main, through grinding or twin screw is extruded and is distributed to equably in the resin and makes colored particle, the U.S. is referred to as condensed pigment (Pigment Concentration) or pigment preparation matter (Pigment Preparation) to these pigment in the 20%-80% ratio.
Described dispersed plasticizer is one or both in Tissuemat E, polypropylene wax, oxidic polyethylene, the liquid paraffin etc.
The described degradation agent that helps is in controlled degradation additive, the photodegradable aid one or both, as corn oil, sunflower oil, epoxidized soybean oil, hard ester acid manganese, hard ester acid iron etc.
The patent of invention that described hygroscopic agent has been applied for for the inventor (number of patent application: the humectant that disappears 2003101031206), its preparation method is (each component by weight): with solid inorganic oxide (MgO, ZnO, CaO, alkali metal oxides such as BaO) 100 parts place the height mixer, add lubricant (liquid paraffin again, high boiling point solvent oil, low molecular weight polycaprolactone alkene wax, in the dioctyl ester one or both) total amount is that a part of 3～30 parts is carried out high-speed mixing to machine temperature rise to 80 ℃～95 ℃, stop high mixing, adding is by remaining lubricant and coupling agent (silane coupling agent, the aluminic acid coupling agent, a kind of in the titanate coupling agent) 1～12 portion of compatible mixed liquor, mixed on low speed 12～18 minutes, add stabilizer (stearic acid again, in the solubility stearate one or both) low mixing took the dish out of the pot in 3～8 minutes after 1～15 part, and the material of gained is promptly placed cold mixer and adds crosslinking agent (low density polyethylene (LDPE), linear low density polyethylene, in the ethylene vinyl acetate one or both) 10～100 parts stir and are cooled to 50 ℃～70 ℃; The gained mixture is poured into the extruding pelletization of plasticating in the double screw extrusion machine of the double gas of high length-diameter ratio in the same way, plasticating temperature is that 80 ℃～160 ℃, main current of electric are 70%～95% of rated current, and the machine internal pressure is 4～10MPa.
The preparation method of above-mentioned biodegradable plastics container may further comprise the steps:
(1) material configuration step comprises:
1, drying: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2～4 hours, and the control baking temperature is 100 ℃～130 ℃.
2, mix: will above-mentioned dry starch-based degradable plastics masterbatch and 0～100 part of polyolefin resin, 0～12 part of color masterbatch, 0～3 part of dispersed plasticizer, help 0～2 part of degradation agent, hygroscopic agent to join respectively for 4～12 parts to be mixed in the low speed mixer even.
(2) machine-shaping step comprises:
The moulding of A, general body:
1, the method for slush molding
(1) extrudes: the material that has mixed in (one) material configuration step is joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is controlled at about 130 ℃～170 ℃.
(2) moulding: the pipe importing in the fusion situation still has been designed in the mould of definite shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, simultaneously mold cools down is made it typing, then open the goods that die cavity has been finalized the design.
2, the method for injection mo(u)lding
(1) injection: the material that has mixed in (one) material configuration step is joined in the hopper of injector, by the heating and melting of injector and the crank motion of injection screw, material is merged into an organic whole mutually, and in the die cavity in nozzle spirt make-up machine, the technological temperature of injector is controlled at about 140 ℃～200 ℃.
(2) moulding: will forming mould before injection closed and is connected with nozzle, according to the full degree adjusting of the material that injects die cavity shot, simultaneously die cavity is carried out cooling and shaping, then open die cavity, obtain goods.
The moulding of B, the special form on the basis of general body forming method:
1, the making of liquid level line: because the starch-based degradable plastics masterbatch mostly is opaque material, the goods of moulding also mostly are opaque body for this reason, like this to the observation inconvenience of content.We set up a stock distributor and a small-sized extruder or the injector that the transparent material of confession is extruded before extruding the die head of pipe or before the injection nozzle for this reason, on distributing box, be provided with for transparent material by feed passage aisle on one side, thereby when extruding or being injected into the materail tube bar, just will on the materail tube bar, produce one transparent thread, at the other printing of transparent thread volumetric marks line, stay the observation window of visual inner liquid level face together on the semifinished piece after the moulding.
2, double-layer bi-color composite article: because some packaged article has sensitivity response to the starch-based degradable plastics masterbatch, for this reason for these article also can be packed well, we set up a stock distributor and a small-sized extruder or the injector that the pure polyolefin resin of confession is extruded or injected equally before the die head of extruding or be injected into the materail tube bar, on distributing box, be provided with for the passage of pure polyolefin resin by the material inner face, two-layer compound during with outside starch-base biodegradation material semifinished piece moulding, make and extrude or to produce the pure polyolefin resin of one deck with regard to the semifinished piece inwall during injection moulding material bed, just make goods become double container after the typing, the direct contact of isolating starch-based degradable plastics masterbatch and content so also helps simultaneously the container closure performance and improves.
A kind of biodegradable plastics container of the present invention has degradable, environmental protection, substitutes the advantage of non-renewable energy resources with renewable resource, and its aesthetic property and durability all can compare favourably with known polyolefin resin plastic container; The preparation method of a kind of biodegradable plastics container of the present invention is simple, and is easy to operate, and the resulting product reject rate is low, has very strong generalization.
The specific embodiment
The biodegradable plastic base material that in the following embodiment of the present invention, uses, color masterbatch, dispersed plasticizer, help degradation agent etc. from the commercially available prod, to select as required." part " among the embodiment is weight portion.
Embodiment 1: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2 hours, add 4 parts of hygroscopic agents then, in low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 130 ℃, and two groups 135 ℃, three groups 140 ℃, four groups 145 ℃, five groups 150 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 2: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2 hours, add 4 parts of hygroscopic agents then, in low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of main extruder, one transparent PP material is joined in time extruder, main extruder will be the fusion plastification material melting charge that can the homogeneous extruder will merge into an organic whole mutually by the distributing box set be expressed into that (technological temperature of main extruder is: one group 130 ℃ in the die cavity of liquid level line scale, two groups 135 ℃, three groups 140 ℃, four groups 145 ℃, five groups 150 ℃.The technological temperature of inferior extruder is: one group 190 ℃, two groups 215 ℃, three groups 230 ℃, four groups 245 ℃, five groups 250 ℃), and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, again through finishing, printing mark, packing is dispatched from the factory.
Embodiment 3: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2 hours, add 4 parts of hygroscopic agents then, in low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of main extruder, 95%PP material added join after 5% color masterbatch mixes in time extruder, main extruder will be the fusion plastification material melting charge that can the homogeneous extruder will melt into an one deck mutually by the distributing box set be extruded into vacuolar membrane by the round die head of having set (technological temperature of main extruder be: one group 130 ℃, two groups 135 ℃, three groups 140 ℃, four groups 145 ℃, five groups 150 ℃.The technological temperature of inferior extruder is: one group 190 ℃, two groups 215 ℃, three groups 230 ℃, four groups 245 ℃, five groups 250 ℃), and import simultaneously in the mould of a hollow bottle shape, be blown into high pressure air and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, again through the finishing, printing mark, the packing the double-layer bi-color hollow container.
Embodiment 4: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2 hours, add 4 parts of hygroscopic agents then, in low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of injector, the melting charge that will merge into an organic whole mutually by injector injects the mould of having set.The technological temperature of injector is: one group 150 ℃, and two groups 155 ℃, three groups 160 ℃, four groups 165 ℃, five groups 170 ℃, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 5: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 100 parts of high density polyethylene (HDPE) resins then, and 10 parts of color masterbatches, 2 parts of dispersed plasticizers help 1 part of degradation agent, 10 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 140 ℃, and two groups 145 ℃, three groups 150 ℃, four groups 155 ℃, five groups 160 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 6: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 100 parts of high density polyethylene (HDPE) resins then, and 10 parts of color masterbatches, 2 parts of dispersed plasticizers help 1 part of degradation agent, 10 parts of hygroscopic agents.Be mixed in low speed mixer evenly, the material that has mixed joined in the hopper of injector, the melting charge that will merge into an organic whole mutually by injector injects the mould of having set.The technological temperature of injector is: one group 160 ℃, and two groups 165 ℃, three groups 170 ℃, four groups 175 ℃, five groups 180 ℃, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 7: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 50 parts of high density polyethylene (HDPE) resins then, and 7 parts of color masterbatches, 1.5 parts of dispersed plasticizers help 1 part of degradation agent, 8 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 135 ℃, and two groups 140 ℃, three groups 145 ℃, four groups 150 ℃, five groups 155 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 8: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 50 parts of high density polyethylene (HDPE) resins then, and 7 parts of color masterbatches, 1.5 parts of dispersed plasticizers help 1 part of degradation agent, 8 parts of hygroscopic agents.Be mixed in low speed mixer evenly, the material that has mixed joined in the hopper of injector, the melting charge that will merge into an organic whole mutually by injector injects the mould of having set.The technological temperature of injector is: one group 155 ℃, and two groups 160 ℃, three groups 165 ℃, four groups 170 ℃, five groups 175 ℃, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 9: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 20 parts of acrylic resins then, and 6 parts of color masterbatches, 1 part of dispersed plasticizer helps 0.7 part of degradation agent, 6 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 140 ℃, and two groups 145 ℃, three groups 150 ℃, four groups 155 ℃, five groups 160 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 10: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 20 parts of acrylic resins then, and 6 parts of color masterbatches, 1 part of dispersed plasticizer helps 0.7 part of degradation agent, 6 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of main extruder.One transparent PP material is joined in time extruder, main extruder will be the fusion plastification material melting charge that can the homogeneous extruder will merge into an organic whole mutually by the distributing box set be expressed into that (technological temperature of main extruder is: one group 145 ℃ in the die cavity of liquid level line scale, two groups 150 ℃, three groups 155 ℃, four groups 160 ℃, five groups 165 ℃; The technological temperature of inferior extruder is: one group 190 ℃, two groups 215 ℃, three groups 230 ℃, four groups 245 ℃, five groups 250 ℃), and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, again through finishing, printing mark, packing is dispatched from the factory.
Embodiment 11: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 20 parts of acrylic resins then, and 6 parts of color masterbatches, 1 part of dispersed plasticizer helps 0.7 part of degradation agent, 6 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of main injector, 95%PP material added join after 5% color masterbatch mixes in time injector, main injector the fusion plastification material by the distributing box set can the homogeneous injector the material of fusion (technological temperature of main injector is: one group 170 ℃ in mould by the runnerless injection set, two groups 175 ℃, three groups 180 ℃, four groups 185 ℃, five groups 190 ℃; The technological temperature of inferior injector is: one group 190 ℃, and two groups 215 ℃, three groups 230 ℃, four groups 245 ℃, five groups 250 ℃), feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, again through the finishing, printing mark, the packing the double-shot moulding goods.
Embodiment 12: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 20 parts of acrylic resins then, and 6 parts of color masterbatches, 1 part of dispersed plasticizer helps 0.7 part of degradation agent, 6 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed is joined in the hopper of main injector, 95%PP material added join after 5% color masterbatch mixes in time injector, main injector the fusion plastification material by the distributing box set can the homogeneous injector the material of fusion (technological temperature of main injector is: one group 170 ℃ in specially designed mould by different runnerless injections, two groups 175 ℃, three groups 180 ℃, four groups 185 ℃, five groups 190 ℃; The technological temperature of inferior injector is: one group 190 ℃, and two groups 215 ℃, three groups 230 ℃, four groups 245 ℃, five groups 250 ℃), feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, again through the finishing, printing mark, the packing the double-layer bi-color injection-molded item.
Embodiment 13: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 100 parts of acrylic resins then, and 10 parts of color masterbatches, 2 parts of dispersed plasticizers help 1 part of degradation agent, 10 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 150 ℃, and two groups 155 ℃, three groups 160 ℃, four groups 165 ℃, five groups 170 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 14: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 100 parts of acrylic resins then, and 10 parts of color masterbatches, 2 parts of dispersed plasticizers help 1 part of degradation agent, 10 parts of hygroscopic agents.Be mixed in low speed mixer evenly, the material that has mixed joined in the hopper of injector, the melting charge that will merge into an organic whole mutually by injector injects the mould of having set.The technological temperature of injector is: one group 180 ℃, and two groups 185 ℃, three groups 190 ℃, four groups 195 ℃, five groups 200 ℃, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 15: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 50 parts of acrylic resins then, and 7 parts of color masterbatches, 1.5 parts of dispersed plasticizers help 1 part of degradation agent, 8 parts of hygroscopic agents.In low speed mixer, be mixed to evenly, the material that has mixed joined in the hopper of extruder, incite somebody to action the melting charge that merge into an organic whole mutually by the fusion plastification of extruder with the round mould of having set and be extruded into pipe.The technological temperature of extruder is: one group 145 ℃, and two groups 150 ℃, three groups 155 ℃, four groups 160 ℃, five groups 165 ℃.Still the pipe in the fusion situation is imported in the mould of a hollow bottle shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Embodiment 16: 100 parts of starch-based degradable plastics masterbatch placed the cyclone type drier dry 2 hours, adds 50 parts of acrylic resins then, and 7 parts of color masterbatches, 1.5 parts of dispersed plasticizers help 1 part of degradation agent, 8 parts of hygroscopic agents.Be mixed in low speed mixer evenly, the material that has mixed joined in the hopper of injector, the melting charge that will merge into an organic whole mutually by injector injects the mould of having set.The technological temperature of injector is: one group 175 ℃, and two groups 180 ℃, three groups 185 ℃, four groups 190 ℃, five groups 195 ℃, feed cooling water expansion tank simultaneously mold cools down is made it typing, then open die cavity and take out the finished product of having finalized the design, through finishing, be packaged into product again.
Biological degradability, the durability test result of the foregoing description 1-16 resulting product are as follows:
The reject rate of resulting product is extremely low, and is the same with general-purpose plastics.
The said goods is consulted and carried out and judgment criteria is HJBZ 12 2000 (environmental labelling product technical requirements-packing articles), wherein about being defined as of degradation rate 〉=15% and 〉=10% two kind; And industry standards Q/FZDH002-2002 (biological degradable plastic tubleware and drinking ware), wherein the product degradation property should meet one of following index: degradation rate 〉=15%; Microbial reproduction progression 〉=3 grade.
According to us the degradation rate result that example 1 and example 14 (the ratio kind that content of starch is minimum and maximum) detect is respectively 55% (180 days), 22% (45 days), all meets and exceeds HJBZ 12 2000 and Q/FZDH002-2002 standard.Another standard feature of product is the physical property of sanitation performance and pressure-bearing, fall-down test.The data of above-mentioned two examples are as follows respectively:
Claims (5)
1. biodegradable plastics container, these plastic container by with 100 parts of dried biodegradable plastic base materials and 20～100 parts of polyolefin resines, 6～12 parts of color masterbatches, 1～3 part of dispersed plasticizer, help that 4～12 parts of 0.7～2 part of degradation agents, hygroscopic agent mix, moulding obtains, wherein umber is all by weight.
2. the preparation method of the described biodegradable plastics container of claim 1 may further comprise the steps:
(1) material configuration step comprises:
(1) drying: 100 parts of starch-based degradable plastics masterbatch were placed the cyclone type drier dry 2～4 hours, and the control baking temperature is 100 ℃～130 ℃;
(2) mix: will above-mentioned dry starch-based degradable plastics masterbatch and 20～100 parts of polyolefin resines, 6～12 parts of color masterbatches, 1～3 part of dispersed plasticizer, help 0.7～2 part of degradation agent, hygroscopic agent to join respectively for 4～12 parts to be mixed in the low speed mixer even, wherein umber is all by weight;
(2) machine-shaping step, this step is the method for slush molding, comprising:
A, extrude: the material that has mixed in the step () is joined in the hopper of extruder, fusion plastification by extruder is extruded into pipe with the melting charge that the round mould of having set will merge into an organic whole mutually, and the technological temperature of extruder is controlled at 130 ℃～170 ℃.
B, moulding: the pipe importing in the fusion situation still has been designed in the mould of definite shape, with the mould closure, and be blown into high pressure air simultaneously and make it by the mould molding of having set, simultaneously mold cools down is made it typing, then open the goods that die cavity has been finalized the design.
3. the preparation method of biodegradable plastics container according to claim 2 wherein replaces with the machine-shaping step method of the injection mo(u)lding that may further comprise the steps:
A, injection: the material that has mixed in the step () is joined in the hopper of injector, by the heating and melting of injector and the crank motion of injection screw, thing is merged into an organic whole mutually, and in the die cavity in nozzle spirt make-up machine, the technological temperature of injector is controlled at 140 ℃～200 ℃.
B, moulding: will forming mould before injection closed and is connected with nozzle, according to the full degree adjusting of the material that injects die cavity shot, simultaneously die cavity is carried out cooling and shaping, then open die cavity, obtain goods.
4. according to the preparation method of claim 2 or 3 described biodegradable plastics containers, when need make the biodegradable plastics container when having the liquid level line goods, on the basis of machine-shaping step, increase following steps: extruding before the die head of pipe or set up a stock distributor and a small-sized extruder or the injector that the transparent material of confession is extruded before the injection nozzle, on distributing box, be provided with for transparent material by feed passage aisle on one side, thereby when extruding or being injected into the materail tube bar, just will on the materail tube bar, produce one transparent thread, at the other printing of transparent thread volumetric marks line, stay the observation window of visual inner liquid level face together on the semifinished piece after the moulding.
5. according to the preparation method of claim 2 or 3 described biodegradable plastics containers, when need make the biodegradable plastics container and are the double-layer bi-color composite article, increasing following steps on the basis of machine-shaping step: set up a stock distributor and a small-sized extruder or the injector that the pure polyolefin resin of confession is extruded or injected before extruding or be injected into the die head of materail tube bar, on distributing box, be provided with for the passage of pure polyolefin resin by the material inner face, two-layer compound during with outside starch-base biodegradation material semifinished piece moulding, make extrude or during injection moulding the semifinished piece inwall to produce the pure polyolefin resin of one deck material bed, make after the typing that goods become double container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200410057158A CN1740063B (en) | 2004-08-27 | 2004-08-27 | Biodegradable plastic container and its making process |
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| CN200410057158A CN1740063B (en) | 2004-08-27 | 2004-08-27 | Biodegradable plastic container and its making process |
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| CN1740063B true CN1740063B (en) | 2010-05-26 |
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| KR100969120B1 (en) * | 2008-07-15 | 2010-07-09 | 현대자동차주식회사 | Mold and method producing injection-molded material |
| CN110881515A (en) * | 2019-11-29 | 2020-03-17 | 上海林志橡塑制品有限公司 | Spacer-free circular tube and application thereof |
| CN111484652A (en) * | 2020-04-24 | 2020-08-04 | 界首市宏利塑料有限公司 | Degradable plastic rope |
| CN113135338A (en) * | 2021-05-08 | 2021-07-20 | 滁州远达彩印包装有限公司 | Printing packaging box with degradation function and production process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136050A (en) * | 1996-02-06 | 1996-11-20 | 雷鸣 | Decompositable material for package and method for producing food container |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1136050A (en) * | 1996-02-06 | 1996-11-20 | 雷鸣 | Decompositable material for package and method for producing food container |
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