CN107337912A - A kind of biodegradable foamed cutlery box production technology of PLA PLAs - Google Patents
A kind of biodegradable foamed cutlery box production technology of PLA PLAs Download PDFInfo
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- CN107337912A CN107337912A CN201710473686.XA CN201710473686A CN107337912A CN 107337912 A CN107337912 A CN 107337912A CN 201710473686 A CN201710473686 A CN 201710473686A CN 107337912 A CN107337912 A CN 107337912A
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- cutlery box
- sheet material
- foaming
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 45
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 26
- 238000005187 foaming Methods 0.000 claims abstract description 15
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 239000006260 foam Substances 0.000 claims abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 4
- 239000004088 foaming agent Substances 0.000 claims abstract description 4
- 239000008187 granular material Substances 0.000 claims abstract description 4
- 230000035800 maturation Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 4
- 239000003431 cross linking reagent Substances 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 claims description 6
- 238000011017 operating method Methods 0.000 claims description 6
- 235000013305 food Nutrition 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 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 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 2
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 abstract description 3
- 239000004626 polylactic acid Substances 0.000 description 20
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 12
- 238000004806 packaging method and process Methods 0.000 description 7
- 235000014655 lactic acid Nutrition 0.000 description 6
- 239000004310 lactic acid Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 235000011888 snacks Nutrition 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 235000012054 meals Nutrition 0.000 description 3
- 239000002207 metabolite Substances 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013618 yogurt Nutrition 0.000 description 1
Classifications
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0004—Use of compounding ingredients, the chemical constitution of which is unknown, broadly defined, or irrelevant
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a kind of biodegradable foamed cutlery box production technology of PLA PLAs, it is related to PLA production technologies field, comprises the following steps：Raw material are modified：17 are pressed in foaming agent PLA raw material:21:43:The auxiliary agent that 17 ratio addition calcium carbonate, crosslinking agent, zinc stearate and monoglyceride mix, goes forward side by side well mixed, the PLA material being modified is made with dual-screw pelletizer；Foam sheet produces：Foam sheet is produced using the extruder of twin-screw series connection single screw rod, PLA material and nucleator are well mixed, add hopper, the stability of feeding is improved from double screw extruder feeding, die orifice goes out sheet material crystallization, through shaping cover cooling and shaping, upper hauling machine, then by sheet material winding into coiled material；Sheet material cures：7 to 10 days maturation periods were carried out to sheet material, are advantageous to second time of foaming；Cutlery box is molded：Sheet material curing after, be made cutlery box finished product using shaping mechanism；Leftover bits recovery is granulated：Caused leftover bits in production process, can be with regenerated granules.
Description
Technical field
The present invention relates to PLA production technologies field, more particularly to a kind of biodegradable foamed cutlery box production of PLA PLAs
Technique.
Background technology
PLA (PLA) is a kind of new, environmentally friendly and function admirable high polymer material.Original used in it
Material is natural products lactic acid (main component of Yoghourt), can be processed into starch and fermented high-volume by corn or potato class
It is cheap to be made.PLA is the macromolecule polyester being polymerized by lactic acid monomer, is a kind of macromolecule of fully biodegradable
Material, its final catabolite are CO2 and H2O, nontoxic to environment, also degradable in vivo.The drop of PLA
Solution intermediate product lactic acid and final catabolite are the metabolites of human normal, and the secondary work of any poison will not be produced to body
With very safe to human body.Further, since its performance can be interior adjusted by being copolymerized with other monomers on a large scale, currently
One of most valued material in Biodegradable material field is turned into.Due to good biocompatibility, PLA
Expanded material can should do medical material extensively, such as artificial skin, artificial skelecton, medicinal slow release agent, pure polylactic acid foam material
It can serve as timbering material；Meanwhile there is polylactic acid foam material substitution petroleum base foamed plastic to be used as packaging and consumer goods
Great potential.
The foaming snack box made of poly-lactic acid material is similar in the market conventional pack product and problems be present：
1) expansion ratio is low, or does not foam, and cost is high；
2) matter is soft, insufficient strength；
3) there is injury to human body；
4) non-degradable, difficult degradation, not environmentally, there is pollution.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of biodegradable foamed cutlery box production technology of PLA PLAs,
To solve caused above-mentioned multinomial defect in the prior art.
To achieve the above object, the present invention provides following technical scheme：A kind of biodegradable foamed meal of PLA PLAs
Box production technology, comprises the following steps：
1) raw material are modified：17 are pressed in foaming agent PLA raw material:21:43:17 ratio addition calcium carbonate, it is crosslinked
The auxiliary agent that agent, zinc stearate and monoglyceride mix, go forward side by side well mixed, the PLA being modified is made with dual-screw pelletizer
Material；
2) foam sheet produces：Foam sheet is produced using the extruder of twin-screw series connection single screw rod, by step 1)
PLA material and nucleator are well mixed, and add hopper, and the stability of feeding is improved from double screw extruder feeding, and die orifice goes out
Sheet material crystallizes, through shaping cover cooling and shaping, upper hauling machine, then by sheet material winding into coiled material；
3) sheet material cures：7 to 10 days maturation periods were carried out to the sheet material of step 2), are advantageous to second time of foaming；
4) cutlery box is molded：After the sheet material curing of step 3), cutlery box finished product is made using shaping mechanism；
5) leftover bits recovery is granulated：Caused leftover bits in production process, can be with regenerated granules.
Preferably, the nucleator in the step 2) is food grade talcum powder.
Preferably, the operating procedure of double screw extruder is used for feeding for first paragraph extruder, melted in the step 2)
Melt, mix, plastify, using dual-screw-stem machine, improve feeding stability and the melt mixed uniformity, strengthen shear effect, second segment
Extruder is for foaming, mixing, cooling down, plastication, is filtered using single screw extrusion machine, then through net-changing device.
Preferably, the operating procedure of forming machine preheats to first pass around heating bed in the step 4) so that sheet material is soft
Change, second time of foaming and secondary crystallization, then be molded through mould, guillotine is cut, and is departed from stacker and is drawn the neat meal of stacking
Box product.
Beneficial effect using above technical scheme is：The foaming snack box that the present invention produces, prepared food packing is can be used as,
Eat packaging, fruit packaging, medical treatment and makeup packaging etc. raw；Cutlery box expansion ratio is light at 10-15 times, and cost is low；Meal
Box ratio is similar to foaming snack box (such as PS) and paper lunch-box, and hardness is high, good toughness, and structural capacity is strong；Cutlery box is nontoxic, to human body without
Injury, the non-full-biodegradable material of polylactic acid PLA, the intermediates lactic acid and final catabolite of PLA are people
The normal metabolite of body, any toxic side effect will not be produced to body, it is very safe to human body；Natural environment is degradable,
Environmental protection, it is pollution-free.
Embodiment
The following detailed description of the preferred embodiment of the biodegradable foamed cutlery box production technology of PLA PLAs of the present invention.
The embodiment of the biodegradable foamed cutlery box production technology of PLA PLAs of the present invention：A kind of PLA PLAs
Biodegradable foamed cutlery box production technology, comprises the following steps：
1) raw material are modified：17 are pressed in foaming agent PLA raw material:21:43:17 ratio addition calcium carbonate, it is crosslinked
The auxiliary agent that agent, zinc stearate and monoglyceride mix, go forward side by side well mixed, the PLA being modified is made with dual-screw pelletizer
Material；
2) foam sheet produces：Foam sheet is produced using the extruder of twin-screw series connection single screw rod, by step 1)
PLA material and nucleator are well mixed, and add hopper, and the stability of feeding is improved from double screw extruder feeding, and die orifice goes out
Sheet material crystallizes, through shaping cover cooling and shaping, upper hauling machine, then by sheet material winding into coiled material；
3) sheet material cures：7 to 10 days maturation periods were carried out to the sheet material of step 2), are advantageous to second time of foaming；
4) cutlery box is molded：After the sheet material curing of step 3), cutlery box finished product is made using shaping mechanism；
5) leftover bits recovery is granulated：Caused leftover bits in production process, can be with regenerated granules.
In the present embodiment, the nucleator in the step 2) is food grade talcum powder.
In the present embodiment, the operating procedure of double screw extruder is used to send for first paragraph extruder in the step 2)
Material, melting, mixing, plasticizings, using dual-screw-stem machine, feeding stability and the melt mixed uniformity are improved, strengthens shear effect,
Second segment extruder is for foaming, mixing, cooling down, plastication, is filtered using single screw extrusion machine, then through net-changing device.
In the present embodiment, the operating procedure of forming machine preheats to first pass around heating bed in the step 4) so that piece
Material softening, second time of foaming and secondary crystallization, then be molded through mould, guillotine is cut, and is departed from stacker and is shown that stacking is neat
Cutlery box product.
Based on above-mentioned, the biodegradable foamed cutlery box production technology of PLA PLAs of the present invention is compared with prior art beneficial to effect
Fruit is：The foaming snack box that the present invention produces, prepared food packing is can be used as, eat packaging, fruit packaging, medical treatment and makeup raw
Packaging etc.；Cutlery box expansion ratio is light at 10-15 times, and cost is low；Cutlery box ratio similar to foaming snack box (such as PS) and paper lunch-box,
Hardness is high, good toughness, and structural capacity is strong；Cutlery box is nontoxic, to human body fanout free region, the non-full-biodegradable material of polylactic acid PLA, gathers
The intermediates lactic acid and final catabolite of lactic acid are the metabolites of human normal, body will not be produced and appointed
What toxic side effect, it is very safe to human body；Natural environment is degradable, environmental protection, pollution-free.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to this hair
Bright protection domain.
Claims (4)
- A kind of 1. biodegradable foamed cutlery box production technology of PLA PLAs, it is characterised in that：Comprise the following steps：1) raw material are modified：17 are pressed in foaming agent PLA raw material:21:43:17 ratio adds calcium carbonate, crosslinking agent, tristearin The auxiliary agent that sour zinc and monoglyceride mix, is gone forward side by side well mixed, and the PLA material being modified is made with dual-screw pelletizer；2) foam sheet produces：Foam sheet is produced using the extruder of twin-screw series connection single screw rod, by the PLA material of step 1) It is well mixed with nucleator, adds hopper, the stability of feeding is improved from double screw extruder feeding, die orifice goes out sheet material knot Crystalline substance, through shaping cover cooling and shaping, upper hauling machine, then by sheet material winding into coiled material；3) sheet material cures：7 to 10 days maturation periods were carried out to the sheet material of step 2), are advantageous to second time of foaming；4) cutlery box is molded：After the sheet material curing of step 3), cutlery box finished product is made using shaping mechanism；5) leftover bits recovery is granulated：Caused leftover bits in production process, can be with regenerated granules.
- A kind of 2. biodegradable foamed cutlery box production technology of PLA PLAs according to claim 1, it is characterised in that institute It is food grade talcum powder to state the nucleator in step 2).
- A kind of 3. biodegradable foamed cutlery box production technology of PLA PLAs according to claim 1, it is characterised in that institute The operating procedure for stating double screw extruder in step 2) is used for feeding, melting, mixing, plasticizing for first paragraph extruder, using double Screw machine, feeding stability and the melt mixed uniformity are improved, strengthen shear effect, second segment extruder is used to foaming, mix, Cooling, plastication, are filtered using single screw extrusion machine, then through net-changing device.
- A kind of 4. biodegradable foamed cutlery box production technology of PLA PLAs according to claim 1, it is characterised in that institute The operating procedure for stating forming machine in step 4) preheats to first pass around heating bed so that sheet material softening, second time of foaming and secondary knot Crystalline substance, then be molded through mould, guillotine is cut, and is departed from stacker and is drawn the neat cutlery box product of stacking.
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| CN201710473686.XA CN107337912A (en) | 2017-06-21 | 2017-06-21 | A kind of biodegradable foamed cutlery box production technology of PLA PLAs |
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| CN201710473686.XA CN107337912A (en) | 2017-06-21 | 2017-06-21 | A kind of biodegradable foamed cutlery box production technology of PLA PLAs |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109762314A (en) * | 2019-01-14 | 2019-05-17 | 温州信环生物材料科技有限公司 | A kind of biodegradable foamed material and the method for manufacturing heat-resisting foaming snack box using it |
| WO2020134041A1 (en) * | 2018-12-29 | 2020-07-02 | 恒天纤维集团有限公司 | Method for preparing high-rate polylactic acid foaming sheet material |
| CN113498920A (en) * | 2021-08-11 | 2021-10-15 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923890A (en) * | 2006-08-29 | 2007-03-07 | 天津国韵生物科技有限公司 | Composition containing polyhydroxy butyrate ester copolymer and polylactic acid for foaming material |
| CN1958668A (en) * | 2006-10-12 | 2007-05-09 | 同济大学 | Plastic foam sheet material of poly lactic acid as suction plastic, and preparation method |
| CN105219044A (en) * | 2015-10-30 | 2016-01-06 | 宁波家塑生物材料科技有限公司 | A kind of complete biodegradable heat-proof polylactic acid foam material and preparation method thereof |
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| CN1923890A (en) * | 2006-08-29 | 2007-03-07 | 天津国韵生物科技有限公司 | Composition containing polyhydroxy butyrate ester copolymer and polylactic acid for foaming material |
| CN1958668A (en) * | 2006-10-12 | 2007-05-09 | 同济大学 | Plastic foam sheet material of poly lactic acid as suction plastic, and preparation method |
| CN105219044A (en) * | 2015-10-30 | 2016-01-06 | 宁波家塑生物材料科技有限公司 | A kind of complete biodegradable heat-proof polylactic acid foam material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020134041A1 (en) * | 2018-12-29 | 2020-07-02 | 恒天纤维集团有限公司 | Method for preparing high-rate polylactic acid foaming sheet material |
| CN109762314A (en) * | 2019-01-14 | 2019-05-17 | 温州信环生物材料科技有限公司 | A kind of biodegradable foamed material and the method for manufacturing heat-resisting foaming snack box using it |
| CN113498920A (en) * | 2021-08-11 | 2021-10-15 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
| CN113498920B (en) * | 2021-08-11 | 2023-04-11 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
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Application publication date: 20171110 |