CN112778722A - Heat-resistant full-biodegradable straw and preparation method thereof - Google Patents
Heat-resistant full-biodegradable straw and preparation method thereof Download PDFInfo
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- CN112778722A CN112778722A CN202011636999.0A CN202011636999A CN112778722A CN 112778722 A CN112778722 A CN 112778722A CN 202011636999 A CN202011636999 A CN 202011636999A CN 112778722 A CN112778722 A CN 112778722A
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- 239000010902 straw Substances 0.000 title claims abstract description 112
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000002425 crystallisation Methods 0.000 claims abstract description 16
- 230000008025 crystallization Effects 0.000 claims abstract description 16
- 239000002028 Biomass Substances 0.000 claims abstract description 11
- 239000004970 Chain extender Substances 0.000 claims abstract description 11
- 229920006167 biodegradable resin Polymers 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000011256 inorganic filler Substances 0.000 claims abstract description 11
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 11
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 239000002667 nucleating agent Substances 0.000 claims abstract description 11
- 238000009775 high-speed stirring Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 23
- -1 poly butylene succinate Polymers 0.000 claims description 21
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 14
- 239000004626 polylactic acid Substances 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000004631 polybutylene succinate Substances 0.000 claims description 11
- 229920002961 polybutylene succinate Polymers 0.000 claims description 11
- 229920002472 Starch Polymers 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 239000008107 starch Substances 0.000 claims description 8
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- 150000004645 aluminates Chemical class 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 6
- 235000013539 calcium stearate Nutrition 0.000 claims description 6
- 239000008116 calcium stearate Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 5
- 229910021532 Calcite Inorganic materials 0.000 claims description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000011425 bamboo Substances 0.000 claims description 5
- 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 5
- 238000000034 method Methods 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 5
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- MJMUPTBJZYLZOS-UHFFFAOYSA-N benzene-1,2,3-tricarboxamide Chemical compound NC(=O)C1=CC=CC(C(N)=O)=C1C(N)=O MJMUPTBJZYLZOS-UHFFFAOYSA-N 0.000 claims description 3
- 230000001588 bifunctional effect Effects 0.000 claims description 3
- 150000002118 epoxides Chemical class 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229940057995 liquid paraffin Drugs 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 3
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 3
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 3
- 239000005543 nano-size silicon particle Substances 0.000 claims description 3
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 claims description 3
- 229920001610 polycaprolactone Polymers 0.000 claims description 3
- 239000004632 polycaprolactone Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000001993 wax Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 239000010903 husk Substances 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract 2
- 238000005469 granulation Methods 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 238000006065 biodegradation reaction Methods 0.000 description 7
- 238000012805 post-processing Methods 0.000 description 6
- 125000005442 diisocyanate group Chemical group 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 229920006238 degradable plastic Polymers 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 235000012171 hot beverage Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention belongs to the technical field of high polymer material processing, and particularly relates to a heat-resistant full-biodegradable straw which comprises the following components in parts by weight: 100 parts of full-biodegradable resin, 3-5 parts of nucleating agent, 2-4 parts of chain extender, 20-35 parts of inorganic filler, 1-2 parts of lubricant, 1-2 parts of compatibilizer and 20-30 parts of biomass filler; the preparation method comprises the following steps: firstly, placing inorganic filler, biomass filler, lubricant and compatibilizer into high-temperature mixing equipment for high-speed stirring modification, then adding fully biodegradable resin, chain extender and nucleating agent, uniformly mixing, then placing into an internal mixer for internal mixing, putting the internally mixed blend into a double-screw extruder for extrusion granulation, then adding into a straw extruder for extrusion molding into a pipe shape, then stretching into post-treatment equipment and quickly carrying out secondary crystallization; and finally cutting into a preset length. The invention can obviously improve the heat resistance of the full-biodegradable straw, so that the straw can be applied to more use scenes, the product value is improved, the processing efficiency is high, and better economic benefit is obtained.
Description
Technical Field
The invention belongs to the technical field of high polymer material processing, and particularly relates to a heat-resistant full-biodegradable straw and a preparation method thereof.
Background
The amount of waste plastics in China is the first worldwide, and the waste plastics not only pollute the environment and harm the health, but also occupy valuable land resources. The substitution of degradable plastics is being realized. In the field of disposable straws, the degradable plastic has a better chance to become a substitute of the traditional plastic in the field because the monomer consumption of the plastic is low, the pollution is easy, and the efficient separation is difficult.
The fully degradable straw products on the market are poor in quality, most of the fully degradable straw products do not meet the use standard, and the fully degradable straw products cannot be used for hot drinks due to poor performance, particularly poor heat resistance, so that the use range is greatly limited.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the heat-resistant full-biodegradable straw and the preparation method thereof, which can obviously improve the heat resistance of the full-biodegradable straw, can be applied to more use scenes, have high processing efficiency and reduce the processing cost.
In order to achieve the purpose, the technical scheme of the invention is that the heat-resistant full-biodegradable straw comprises the following components in parts by weight: 100 parts of full-biodegradable resin, 3-5 parts of nucleating agent, 2-4 parts of chain extender, 20-35 parts of inorganic filler, 1-2 parts of lubricant, 1-2 parts of compatibilizer and 20-30 parts of biomass filler.
Further, the fully biodegradable resin comprises one or more of polylactic acid, polybutylene succinate, polycaprolactone and polyhydroxyalkanoate.
Further, the nucleating agent is any one of silicate, nano silicon dioxide, ethylene bis stearamide and benzene tricarboxamide.
Further, the chain extender is any one of epoxide, isocyanate compounds, anhydride compounds and bifunctional acid derivatives.
Further, the inorganic filler comprises at least one of calcium carbonate, calcite, kaolin, talcum powder, barium sulfate, magnesium sulfate and silicon dioxide.
Further, the lubricant comprises any one of monoglyceride, polyethylene wax, calcium stearate, stearic acid, zinc stearate and liquid paraffin.
Further, the compatibilizer comprises at least one of aluminate and titanate.
Further, the biomass filler comprises at least one of starch, bamboo powder, chaff, microcrystalline cellulose and coffee grounds.
The invention also provides a preparation method of the heat-resistant full-biodegradable straw, which comprises the following steps:
1) placing the inorganic filler, the biomass filler, the lubricant and the compatibilizer into high-temperature mixing equipment, and stirring at a high speed of 130-150 ℃ for 15-20 min;
2) adding the fully biodegradable resin, the chain extender and the nucleating agent into the mixture prepared in the step 1), uniformly mixing, and banburying in an internal mixer at 120-220 ℃ for 10-15 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 130-220 ℃ to obtain a heat-resistant fully biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a pipe shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, wherein the heating temperature in the post-treatment equipment is room temperature-200 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 1-10 m/s for secondary crystallization;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
Further, the rotation speed of high-speed stirring in the step 1) is 1000 rpm-3000 rpm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the heat resistance of the full-biodegradation straw can be obviously improved, so that the straw can be applied to more use scenes, and the use range of the full-biodegradation straw is expanded;
(2) according to the invention, post-processing equipment is adopted to uniformly heat the suction pipe, the suction pipe rapidly passes through the post-processing equipment, namely, a secondary crystallization process is carried out, compared with the existing suction pipe manufacturing process, the pipe to be cut is only rapidly passed through the post-processing equipment, so that no influence is caused on the production efficiency, but a product with heat resistance can be obtained, the product value is improved, and more excellent economic benefits are obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an overall structure of an aftertreatment device according to embodiment 4 of the present invention;
FIG. 2 is a front view of an aftertreatment apparatus provided in embodiment 4 of the invention;
FIG. 3 is a top view of the post-treatment apparatus provided in example 4 of the present invention with the insulated top plate removed;
FIG. 4 is a side view of an aftertreatment apparatus provided in example 4 of the invention;
in the figure: 1. heating the soleplate; 2. heating the side plate; 3. a straw guide plate; 4. a heat preservation top plate; 5. a straw guide; 6. a straw guide hole; 7. heating the resistance wire.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a heat-resistant full-biodegradable straw which comprises the following components in parts by weight: 100 parts of full-biodegradable resin, 3-5 parts of nucleating agent, 2-4 parts of chain extender, 20-35 parts of inorganic filler, 1-2 parts of lubricant, 1-2 parts of compatibilizer and 20-30 parts of biomass filler.
Wherein the fully biodegradable resin comprises one or more of polylactic acid, polybutylene succinate, polycaprolactone and polyhydroxyalkanoate; the nucleating agent is any one of silicate, nano silicon dioxide, ethylene bis stearamide and benzene tricarboxamide; the chain extender is any one of epoxide, isocyanate compound, anhydride compound and bifunctional acid derivative; the inorganic filler comprises at least one of calcium carbonate, calcite, kaolin, talcum powder, barium sulfate, magnesium sulfate and silicon dioxide; the lubricant comprises any one of monoglyceride, polyethylene wax, calcium stearate, stearic acid, zinc stearate and liquid paraffin; the compatibilizer comprises at least one of aluminate and titanate; the biomass filler comprises at least one of starch, bamboo powder, rice husk, microcrystalline cellulose and coffee grounds.
The invention also provides a preparation method of the heat-resistant full-biodegradable straw, which comprises the following steps:
1) placing the inorganic filler, the biomass filler, the lubricant and the compatibilizer into high-temperature mixing equipment, and stirring at 1000-3000 rpm for 15-20 min at 130-150 ℃;
2) adding the fully biodegradable resin, the chain extender and the nucleating agent into the mixture prepared in the step 1), uniformly mixing, and banburying in an internal mixer at 120-220 ℃ for 10-15 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 130-220 ℃ to obtain a heat-resistant fully biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a pipe shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, wherein the heating temperature in the post-treatment equipment is room temperature-200 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 1-10 m/s for secondary crystallization;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
The technical effect of the heat-resistant fully biodegradable straw of the present invention is illustrated by the following specific examples.
Example 1
The embodiment provides a heat-resistant full-biodegradable straw which comprises the following components in parts by weight: 100 parts of polylactic acid, 3 parts of sodium silicate, 2 parts of diisocyanate, 30 parts of calcium carbonate, 1 part of aluminate, 1 part of calcium stearate and 25 parts of starch.
The embodiment also provides a preparation method of the heat-resistant full-biodegradable straw, which comprises the following steps:
1) putting calcium carbonate, starch, calcium stearate and aluminate into high-temperature mixing equipment, and stirring at 2000rpm for 15min at 135 ℃;
2) adding polylactic acid, diisocyanate and sodium silicate into the mixture prepared in the step 1), uniformly mixing, and banburying in a 135 ℃ internal mixer for 10 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain a heat-resistant fully-biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a tube shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, controlling the heating temperature in the post-treatment equipment to be 110 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 2m/s for secondary crystallization to improve the heat resistance;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
Comparative example 1
The present comparative example provides a heat-resistant fully biodegradable straw, the composition of which is completely identical to that of example 1, except that the preparation method of the heat-resistant fully biodegradable straw comprises the following steps:
1) putting calcium carbonate, starch, calcium stearate and aluminate into high-temperature mixing equipment, and stirring at 2000rpm for 15min at 135 ℃;
2) adding polylactic acid, diisocyanate and sodium silicate into the mixture prepared in the step 1), uniformly mixing, and banburying in a 135 ℃ internal mixer for 10 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain a heat-resistant fully-biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a tube shape by using a straw extruder;
5) and cutting the prepared pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
Example 2
The embodiment provides a heat-resistant full-biodegradable straw which comprises the following components in parts by mass: 70 parts of polylactic acid, 30 parts of polybutylene succinate, 4 parts of ethylene bis stearamide, 3 parts of p-phenylene diisocyanate, 30 parts of talcum powder, 1.5 parts of aluminate, 1 part of stearic acid and 20 parts of starch.
The embodiment also provides a preparation method of the heat-resistant full-biodegradable straw, which comprises the following steps:
1) putting talcum powder, starch, stearic acid and aluminate into high-temperature mixing equipment, and stirring at 1500rpm for 15min at 140 ℃;
2) adding polylactic acid, polybutylene succinate, p-phenylene diisocyanate and ethylene bis stearamide into the mixture prepared in the step 1), uniformly mixing, and banburying in a 135 ℃ internal mixer for 15 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain a heat-resistant fully-biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a tube shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, controlling the heating temperature in the post-treatment equipment to be 100 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 1.5m/s for secondary crystallization to improve the heat resistance;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
Comparative example 2
The comparative example provides a full-biodegradation straw, which comprises the following components in parts by mass: 70 parts of polylactic acid and 30 parts of polybutylene succinate.
The comparative example also provides a preparation method of the full-biodegradation straw, which comprises the following steps:
1) uniformly mixing polylactic acid and polybutylene succinate, and banburying in a 135 ℃ banbury mixer for 15 min;
2) putting the blend obtained after banburying in the step 1) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain a full-biodegradable straw material;
3) extruding the granulated full-biodegradable straw material into a tube shape by using a straw extruder;
4) stretching the pipe prepared in the step 3) into post-treatment equipment, controlling the pipe to pass through the post-treatment equipment at the speed of 1.5m/s at the heating temperature of 100 ℃ in the post-treatment equipment, and performing secondary crystallization;
5) and cutting the crystallized pipe into preset length to obtain the fully biodegradable straw.
Example 3
The embodiment provides a heat-resistant full-biodegradable straw which comprises the following components in parts by mass: 50 parts of polylactic acid, 50 parts of polybutylene succinate, 3 parts of ethylene bis stearamide, 3 parts of diisocyanate, 30 parts of calcite, 1 part of titanate, 1 part of zinc stearate and 25 parts of bamboo powder.
The embodiment also provides a preparation method of the heat-resistant full-biodegradable straw, which comprises the following steps:
1) putting calcite, bamboo powder, zinc stearate and titanate into high-temperature mixing equipment, and stirring at 150 ℃ and 3000rpm for 15 min;
2) adding polylactic acid, polybutylene succinate, diisocyanate and ethylene bis stearamide into the mixture prepared in the step 1), uniformly mixing, and banburying in a banbury mixer at 145 ℃ for 20 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain the heat-resistant full-biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a tube shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, controlling the heating temperature in the post-treatment equipment to be 120 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 3m/s for secondary crystallization to improve the heat resistance;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
Comparative example 3
The comparative example provides a full-biodegradation straw, which comprises the following components in parts by mass: 50 parts of polylactic acid and 50 parts of polybutylene succinate.
The comparative example also provides a preparation method of the full-biodegradation straw, which comprises the following steps:
1) putting polylactic acid and polybutylene succinate into an internal mixer at 145 ℃ for internal mixing for 20 min;
2) putting the blend obtained after banburying in the step 1) into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain the fully biodegradable straw material;
3) extruding the granulated full-biodegradable straw material into a tube shape by using a straw extruder;
4) stretching the pipe prepared in the step 3) into post-treatment equipment, wherein the heating temperature in the post-treatment equipment is 120 ℃, and controlling the pipe to pass through the post-treatment equipment at a speed of 3m/s for secondary crystallization;
5) and cutting the crystallized pipe into preset length to obtain the fully biodegradable straw.
Example 4
The embodiment provides post-treatment equipment for improving the heat resistance of a full-biodegradation straw, which can be used as the post-treatment equipment used in the preparation methods of the embodiment 1, the embodiment 2, the embodiment 3, the comparative example 2 and the comparative example 3, and is used for uniformly heating a pipe so that the pipe is subjected to secondary crystallization in the quick passing process in the post-treatment equipment; this aftertreatment equipment includes heating bottom plate 1, and the left and right sides of heating bottom plate 1 is provided with heating curb plate 2 relatively, and both sides are provided with the straw guide plate 3 that is used for the location straw relatively around, and heating curb plate 2 and straw guide plate 3 enclose to close and form the heating space who holds the straw, all are equipped with the heating member that is used for the straw heating on heating bottom plate 1 and the heating curb plate 2. The straw passes through straw guide plate 3 and gets into heating curb plate 2 and straw guide plate 3 and encloses the heating space who closes the formation, utilizes the heating member that sets up on heating bottom plate 1 and the heating curb plate 2 to carry out quick, even heating to the straw, makes its secondary crystallization, during the straw gets into draw gear afterwards, accomplishes follow-up drawing, the pipe cutting step, the straw after the aftertreatment equipment processing that this embodiment provided is heated the crystallization in the short time, the temperature tolerance has obtained showing the improvement.
Furthermore, the peripheral edge of the heating bottom plate 1 for fixing the whole set of aftertreatment equipment is provided with a sliding groove, and the heating side plate 2 and the suction pipe guide plate 3 are detachably connected with the heating bottom plate 1 through the sliding groove, so that the whole aftertreatment equipment can be conveniently disassembled and cleaned.
In the embodiment that refines, the heating member is heating resistor silk 7, and heating resistor silk 7 evenly arranges on the inside wall of heating bottom plate 1 and heating curb plate 2, and during the operation, opens the temperature in heating resistor silk 7 regulation heating space, carries out the heating at diversified no dead angle to the suction pipe.
In order to facilitate disassembly and assembly and cleaning, the straw guide plate 3 is embedded with a straw guide 5, a straw guide hole 6 is formed in the middle of the straw guide 5, and a straw passes through a heating space of the post-treatment equipment through the straw guide holes 6 in the two straw guide plates 3 after coming out of a cooling water tank in a previous process. Specifically, the straw guides 5 on the two straw guide plates 3 are arranged oppositely, so that straws can be better fixed and are uniformly heated. The straw guide 5 is preferably disposed on the straw guide plate 3 at a side close to the heating base plate 1, to improve the heating efficiency of the post-processing apparatus.
The post-processing equipment further comprises a heat preservation top plate 4, wherein the heat preservation top plate 4 is connected to the tops of the heating side plate 2 and the suction pipe guide plate 3 and covers the whole heating space, the heat dissipation speed in the heating space is reduced, and the heating efficiency of the post-processing equipment is further improved.
The straw materials and straw properties obtained in example 1, example 2, example 3, comparative example 1, comparative example 2 and comparative example 3 were tested, and the results are shown in table 1.
TABLE 1 straw Material and straw Performance
As can be seen from the table 1, under the same material formula, the pipe is subjected to post-treatment secondary crystallization by adopting the preparation method provided by the invention, and the prepared straw has more excellent mechanical property and heat resistance; under the same processing technology, the material is modified by adopting the preparation method provided by the invention, the crystallization property of the material is improved, and the pipe is subjected to post-treatment and secondary crystallization, so that the prepared straw has superior mechanical property and heat resistance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The heat-resistant full-biodegradable straw is characterized by comprising the following components in parts by mass: 100 parts of full-biodegradable resin, 3-5 parts of nucleating agent, 2-4 parts of chain extender, 20-35 parts of inorganic filler, 1-2 parts of lubricant, 1-2 parts of compatibilizer and 20-30 parts of biomass filler.
2. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the full-biodegradable resin comprises one or more of polylactic acid, poly butylene succinate, polycaprolactone and polyhydroxyalkanoate.
3. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the nucleating agent is any one of silicate, nano silicon dioxide, ethylene bis stearamide and benzene tricarboxamide.
4. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the chain extender is any one of epoxide, isocyanate compounds, anhydride compounds and bifunctional acid derivatives.
5. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the inorganic filler comprises at least one of calcium carbonate, calcite, kaolin, talcum powder, barium sulfate, magnesium sulfate and silicon dioxide.
6. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the lubricant comprises any one of monoglyceride, polyethylene wax, calcium stearate, stearic acid, zinc stearate and liquid paraffin.
7. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the compatibilizer comprises at least one of aluminate and titanate.
8. A heat-resistant fully biodegradable straw as defined in claim 1, wherein: the biomass filler comprises at least one of starch, bamboo powder, rice husk, microcrystalline cellulose and coffee grounds.
9. A method for preparing a thermo-resistant fully biodegradable straw according to any of claims 1-8, comprising the steps of:
1) placing the inorganic filler, the biomass filler, the lubricant and the compatibilizer into high-temperature mixing equipment, and stirring at a high speed of 130-150 ℃ for 15-20 min;
2) adding the fully biodegradable resin, the chain extender and the nucleating agent into the mixture prepared in the step 1), uniformly mixing, and banburying in an internal mixer at 120-220 ℃ for 10-15 min;
3) putting the blend obtained after banburying in the step 2) into a double-screw extruder, and extruding and granulating at 130-220 ℃ to obtain a heat-resistant fully biodegradable straw material;
4) extruding the prepared heat-resistant full-biodegradable straw material into a pipe shape by using a straw extruder;
5) stretching the pipe prepared in the step 4) into post-treatment equipment, wherein the heating temperature in the post-treatment equipment is room temperature-200 ℃, and controlling the pipe to pass through the post-treatment equipment at the speed of 1-10 m/s for secondary crystallization;
6) and cutting the crystallized pipe into a preset length to obtain the heat-resistant full-biodegradable straw.
10. The method for preparing a heat-resistant fully biodegradable straw as claimed in claim 9, wherein: the rotating speed of high-speed stirring in the step 1) is 1000-3000 rpm.
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