CN113831607B - Full-biodegradable straw and preparation method thereof - Google Patents
Full-biodegradable straw and preparation method thereof Download PDFInfo
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- CN113831607B CN113831607B CN202111315271.2A CN202111315271A CN113831607B CN 113831607 B CN113831607 B CN 113831607B CN 202111315271 A CN202111315271 A CN 202111315271A CN 113831607 B CN113831607 B CN 113831607B
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- 239000010902 straw Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims description 5
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 28
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 26
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims abstract description 26
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 22
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 13
- 229920000954 Polyglycolide Polymers 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 150000002191 fatty alcohols Chemical class 0.000 claims abstract description 13
- 239000004633 polyglycolic acid Substances 0.000 claims abstract description 13
- -1 polyoxyethylene Polymers 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 239000013530 defoamer Substances 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000002667 nucleating agent Substances 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 6
- 239000010445 mica Substances 0.000 claims description 11
- 229910052618 mica group Inorganic materials 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- QWUWMCYKGHVNAV-UHFFFAOYSA-N 1,2-dihydrostilbene Chemical compound C=1C=CC=CC=1CCC1=CC=CC=C1 QWUWMCYKGHVNAV-UHFFFAOYSA-N 0.000 claims description 5
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 5
- 239000000600 sorbitol Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000004359 castor oil Substances 0.000 claims description 2
- 235000019438 castor oil Nutrition 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- QEOSCXACXNFJCY-AKHDSKFASA-N (2R,3R,4S,5R)-6-benzyl-7-phenylheptane-1,2,3,4,5,6-hexol Chemical compound C(C1=CC=CC=C1)C(O)([C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO)CC1=CC=CC=C1 QEOSCXACXNFJCY-AKHDSKFASA-N 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 2
- 244000269722 Thea sinensis Species 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 2
- 235000012171 hot beverage Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 235000020965 cold beverage Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G21/00—Table-ware
- A47G21/18—Drinking straws or the like
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- 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
-
- 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
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/18—Homopolymers or copolymers of nitriles
- C08J2433/20—Homopolymers or copolymers of acrylonitrile
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a full-biodegradable straw, which comprises a straw substrate; and a heat-resistant coating layer arranged on the surface of the suction pipe substrate; the straw substrate comprises the following raw materials in parts by weight: 0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3; the raw materials of the heat-resistant coating comprise the following components in percentage by mass: 15 to 18 percent of acrylonitrile, 8 to 12 percent of styrene, 4 to 6 percent of lauryl methacrylate, 1 to 1.5 percent of tributyl citrate, 1.5 to 3 percent of polyoxyethylene fatty alcohol, 0.3 to 0.6 percent of tert-butyl hydroperoxide, 0.15 to 0.2 percent of organic silicon defoamer and the balance of water. The fully-biodegradable straw provided by the invention has excellent heat resistance through the combined action of the straw substrate and the heat-resistant coating.
Description
Technical Field
The invention belongs to the technical field of straws, and particularly relates to a full-biodegradable straw and a preparation method thereof.
Background
In recent years, more and more people are keen to get a cup of cold or hot drink to relax the mood while shopping or working. Various milky tea shops and fruit tea shops such as the bamboo shoots in spring after rain generally fill streets and alleys, and the development of the beverage industry brings about the consumption of a large number of straws.
The present full-degradable straw products on the market are different in quality, most of the products do not meet the use standard, and the use range is greatly limited because the performance is poor, particularly because the heat resistance is poor, the straw can not be used for hot drinks.
Disclosure of Invention
In view of the above, the present invention is directed to a fully biodegradable straw having excellent heat resistance, and a method for preparing the same.
The invention provides a full-biodegradable straw, which comprises a straw substrate;
and a heat-resistant coating layer arranged on the surface of the suction pipe substrate;
the straw substrate comprises the following raw materials in parts by weight:
0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3;
the raw materials of the heat-resistant coating comprise the following components in percentage by mass:
15 to 18 percent of acrylonitrile, 8 to 12 percent of styrene, 4 to 6 percent of lauryl methacrylate, 1 to 1.5 percent of tributyl citrate, 1.5 to 3 percent of polyoxyethylene fatty alcohol, 0.3 to 0.6 percent of tert-butyl hydroperoxide, 0.15 to 0.2 percent of organic silicon defoamer and the balance of water.
In the examples of the present invention, the raw materials required for preparing the straw substrate were as follows:
1 part of 1 (0.8-1.2) of a mixture of dibenzyl sorbitol and mica powder, 60 parts of a mixture of polyglycolic acid and PBS resin in a mass ratio of 3;
or 0.5 part of a mixture of 1 (0.8-1.2) of dibenzylidene sorbitol and mica powder, 30 parts of a mixture of polyglycolic acid and PBS resin with the mass ratio of 3;
or 0.8 part of a mixture of 1 (0.8-1.2) of dibenzylidene sorbitol and mica powder, 45 parts of a mixture of polyglycolic acid and PBS resin with the mass ratio of 3.
In a specific embodiment, the raw materials of the heat-resistant coating comprise the following components: 18% of acrylonitrile, 12% of styrene, 6% of lauryl methacrylate, 1.5% of tributyl citrate, 3% of polyoxyethylene fatty alcohol, 0.6% of tert-butyl hydroperoxide, 0.2% of an organic silicon defoamer and the balance of water;
or the raw materials of the heat-resistant coating comprise the following components: 15% of acrylonitrile, 8% of styrene, 4% of lauryl methacrylate, 1% of tributyl citrate, 1.5% of polyoxyethylene fatty alcohol, 0.3% of tert-butyl hydroperoxide, 0.15% of an organic silicon defoamer and the balance of water;
or the raw materials of the heat-resistant coating comprise the following components: 17% of acrylonitrile, 10% of styrene, 5% of lauryl methacrylate, 1.3% of tributyl citrate, 2.3% of polyoxyethylene fatty alcohol, 0.5% of tert-butyl hydroperoxide, 0.18% of organic silicon defoamer and the balance of water.
In the present invention, the polyglycolic acid has a weight average molecular weight of 30 to 50 ten thousand and a melting point of 225 to 230 ℃.
In the invention, the nucleating agent is a mixture of dibenzyl sorbitol and mica powder in a mass ratio of 1 (0.8-1.2). In a specific embodiment, the nucleating agent is a mixture of dibenzil sorbitol and mica powder in a mass ratio of 1.8; or a mixture of dibenzil sorbitol and mica powder in a mass ratio of 1; or a mixture of dibenzil sorbitol and mica powder in a mass ratio of 1.
In the present invention, the plasticizer is castor oil;
the filler is plasticized starch;
the compatilizer is nano calcium carbonate.
In the present invention, the thickness of the heat-resistant coating layer is 10 to 30 micrometers.
The invention provides a preparation method of a full-biodegradable straw in the technical scheme, which comprises the following steps:
mixing 0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3;
the straw substrate raw material is processed to obtain a straw substrate;
coating heat-resistant paint on the straw substrate, and drying to obtain a full-biodegradable straw;
the heat-resistant coating comprises 15-18% of acrylonitrile, 8-12% of styrene, 4-6% of lauryl methacrylate, 1-1.5% of tributyl citrate, 1.5-3% of polyoxyethylene fatty alcohol, 0.3-0.6% of tert-butyl hydroperoxide, 0.15-0.2% of an organic silicon defoaming agent and the balance of water.
In the invention, in the extrusion granulation process, the temperature of the feeding section is 125-135 ℃, the temperature of the mixing section is 215-225 ℃, and the temperature of the extrusion section is 225-235 ℃;
a water bracing mode is adopted during granulation; the temperature of the water tank is 75-80 ℃.
In the present invention, the temperature of the drying is 45 to 55 ℃, preferably 50 ℃.
The invention adopts the following method to detect the heat resistance of the full-biodegradation straw:
the straw of the invention and the common paper straw were soaked in water at 80 ℃ and 25 ℃ respectively, and the softening time of the straw was recorded.
The invention provides a full-biodegradable straw, which comprises a straw substrate; and a heat-resistant coating layer arranged on the surface of the suction pipe substrate; the straw substrate comprises the following raw materials in parts by weight: 0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3; the raw materials of the heat-resistant coating comprise the following components in percentage by mass: 15 to 18 percent of acrylonitrile, 8 to 12 percent of styrene, 4 to 6 percent of lauryl methacrylate, 1 to 1.5 percent of tributyl citrate, 1.5 to 3 percent of polyoxyethylene fatty alcohol, 0.3 to 0.6 percent of tert-butyl hydroperoxide, 0.15 to 0.2 percent of organic silicon defoamer, and the balance of water. The fully biodegradable straw provided by the invention has excellent heat resistance through the combined action of the straw substrate and the heat-resistant coating.
Detailed Description
In order to further illustrate the present invention, the following examples are provided to describe a fully biodegradable straw and a method for making the same in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
The raw materials required for preparing the straw substrate are as follows:
1 part of a mixture of dibenzil sorbitol and mica powder in a proportion of 1;
the raw materials required for preparing the suction pipe matrix are mixed for 1 hour by a high-speed mixer and then put into a double screw for granulation. The length-diameter ratio of the double-screw extruder is at least 1:75, the temperature of the feeding section is kept at 135 ℃, the temperature of the mixing section is 225 ℃, and the temperature of the extrusion section is kept at 235 ℃; granulating the material by adopting a water bracing mode, controlling the temperature of a water tank to be 75-80 ℃, drying the finished master batch for 2 hours at 80 ℃, packaging by adopting an aluminum foil, vacuumizing and storing in a dry environment;
directly feeding the master batch into a machine to prepare a straw matrix;
coating the heat-resistant coating on the surface of a straw substrate, and drying at 50 ℃ to obtain the fully biodegradable straw, wherein the thickness of the coating is 30 microns;
the heat-resistant coating is prepared from the following components:
18% of acrylonitrile, 12% of styrene, 6% of lauryl methacrylate, 1.5% of tributyl citrate, 3% of polyoxyethylene fatty alcohol, 0.6% of tert-butyl hydroperoxide, 0.2% of an organic silicon defoamer and the balance of water.
Example 2
The raw materials required for preparing the straw substrate are as follows:
0.5 part of a mixture of dibenzyl sorbitol and mica powder with the mass ratio of 1;
the raw materials required for preparing the suction pipe matrix are mixed for 1 hour by a high-speed mixer and then put into a double screw for granulation. The length-diameter ratio of the double-screw extruder is at least 1:75, the temperature of the feeding section is kept at 125 ℃, the temperature of the mixing section is kept at 215 ℃, and the temperature of the extrusion section is kept at 225 ℃; granulating the material by adopting a water bracing mode, controlling the temperature of a water tank to be 75-80 ℃, drying the finished master batch for 2 hours at 80 ℃, packaging by adopting an aluminum foil, vacuumizing and storing in a dry environment;
directly processing the master batch on a machine to prepare a straw matrix;
coating the heat-resistant coating on the surface of a straw substrate, and drying at 50 ℃ to obtain the fully biodegradable straw, wherein the thickness of the coating is 10 microns;
the heat-resistant coating is prepared from the following components:
15% of acrylonitrile, 8% of styrene, 4% of lauryl methacrylate, 1% of tributyl citrate, 1.5% of polyoxyethylene fatty alcohol, 0.3% of tert-butyl hydroperoxide, 0.15% of organic silicon defoamer and the balance of water.
Example 3
The raw materials required for preparing the straw substrate are as follows:
0.8 part of a mixture of dibenzyl sorbitol and mica powder 1, 45 parts of a mixture of polyglycolic acid and PBS resin in a mass ratio of 3;
firstly, mixing the raw materials required for preparing the straw matrix for 1 hour by using a high-speed mixer, and then throwing the mixture into a double screw for granulation. The length-diameter ratio of the double-screw extruder is at least 1; granulating the material by adopting a water bracing strip mode, controlling the temperature of a water tank to be 75-80 ℃, drying the finished master batch for 2 hours at 80 ℃, packaging by adopting an aluminum foil, vacuumizing, and storing in a dry environment;
directly processing the master batch on a machine to prepare a straw matrix;
coating the heat-resistant coating on the surface of a straw substrate, and drying at 50 ℃ to obtain the fully biodegradable straw, wherein the thickness of the coating is 20 micrometers;
the heat-resistant coating is prepared from the following components:
17% of acrylonitrile, 10% of styrene, 5% of lauryl methacrylate, 1.3% of tributyl citrate, 2.3% of polyoxyethylene fatty alcohol, 0.5% of tert-butyl hydroperoxide, 0.18% of organic silicon defoamer and the balance of water.
Comparative example
Spuntree brand paper straws, 6X 197mm, from Sujiadelin decorative packaging, inc., wuxi.
TABLE 1 softening time of straws and plain paper straws prepared in examples 1 to 3
From the above embodiments, the present invention provides a fully biodegradable straw, comprising a straw substrate; and a heat-resistant coating layer arranged on the surface of the suction pipe substrate; the straw substrate comprises the following raw materials in parts by weight: 0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3; the raw materials of the heat-resistant coating comprise the following components in percentage by mass: 15 to 18 percent of acrylonitrile, 8 to 12 percent of styrene, 4 to 6 percent of lauryl methacrylate, 1 to 1.5 percent of tributyl citrate, 1.5 to 3 percent of polyoxyethylene fatty alcohol, 0.3 to 0.6 percent of tert-butyl hydroperoxide, 0.15 to 0.2 percent of organic silicon defoamer, and the balance of water. The fully biodegradable straw provided by the invention has excellent heat resistance through the combined action of the straw substrate and the heat-resistant coating.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A full-biodegradable straw comprises a straw substrate;
and a heat-resistant coating layer arranged on the surface of the suction pipe substrate; the thickness of the heat-resistant coating is 10-30 micrometers;
the straw substrate comprises the following raw materials in parts by weight:
0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3;
the weight average molecular weight of the polyglycolic acid is 30-50 ten thousand, and the melting point is 225-230 ℃; the nucleating agent is a mixture of dibenzil sorbitol and mica powder in a mass ratio of 1 (0.8-1.2); the plasticizer is castor oil; the filler is plasticized starch; the compatilizer is nano calcium carbonate;
the raw materials of the heat-resistant coating comprise the following components in percentage by mass:
15 to 18 percent of acrylonitrile, 8 to 12 percent of styrene, 4 to 6 percent of lauryl methacrylate, 1 to 1.5 percent of tributyl citrate, 1.5 to 3 percent of polyoxyethylene fatty alcohol, 0.3 to 0.6 percent of tert-butyl hydroperoxide, 0.15 to 0.2 percent of organic silicon defoamer and the balance of water.
2. A method for preparing the full-biodegradable straw as claimed in claim 1, comprising the steps of:
mixing 0.5-1 part of nucleating agent, 30-60 parts of polyglycolic acid and PBS resin mixture with the mass ratio of 3;
the straw substrate raw material is processed to obtain a straw substrate;
coating heat-resistant paint on the straw substrate, and drying to obtain the fully biodegradable straw;
the heat-resistant coating comprises 15-18% of acrylonitrile, 8-12% of styrene, 4-6% of lauryl methacrylate, 1-1.5% of tributyl citrate, 1.5-3% of polyoxyethylene fatty alcohol, 0.3-0.6% of tert-butyl hydroperoxide, 0.15-0.2% of an organic silicon defoamer and the balance of water.
3. The preparation method of claim 2, wherein in the extrusion granulation process, the temperature of the feeding section is 125-135 ℃, the temperature of the mixing section is 215-225 ℃, and the temperature of the extrusion section is 225-235 ℃;
a water bracing mode is adopted during granulation; the temperature of the water tank is 75-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315271.2A CN113831607B (en) | 2021-11-08 | 2021-11-08 | Full-biodegradable straw and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315271.2A CN113831607B (en) | 2021-11-08 | 2021-11-08 | Full-biodegradable straw and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113831607A CN113831607A (en) | 2021-12-24 |
| CN113831607B true CN113831607B (en) | 2022-11-15 |
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