CN115536990A - High-temperature-resistant biodegradable desorption tube material and preparation method and application thereof - Google Patents
High-temperature-resistant biodegradable desorption tube material and preparation method and application thereof Download PDFInfo
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- CN115536990A CN115536990A CN202111637883.3A CN202111637883A CN115536990A CN 115536990 A CN115536990 A CN 115536990A CN 202111637883 A CN202111637883 A CN 202111637883A CN 115536990 A CN115536990 A CN 115536990A
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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
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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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
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- 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
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention discloses a high-temperature-resistant biodegradable desorption tube material which comprises the following preparation raw materials in parts by weight: 30-70 parts of lactic acid polymer, 30-70 parts of polydiacid dihydric alcohol ester, 0.1-5 parts of fat-soluble compound, 0.1-3 parts of epoxy polymer, 0.1-1 part of dispersant and 3-20 parts of functional additive. According to the invention, through blending the poly (butylene succinate) and the polylactic acid, under the synergistic effect of the sebacic acid dibenzoylhydrazide and the talcum powder, the crystallization regularity of the polymer is improved, and the heat resistance of the straw material is improved. And by introducing the epoxy polymer, the low-molecular-weight polymer is copolymerized and connected, the mechanical property of the straw material melt is improved, and the tensile property, the bending resistance and the impact resistance of the straw material are improved. Meanwhile, a parallel double-screw extruder with the length-diameter ratio of 28-50 is adopted, so that the stability of the material is improved, and the advanced degradation of the composite material is avoided.
Description
Technical Field
The invention relates to a high-temperature-resistant biodegradable desorption tube material and a preparation method thereof, relates to C08L, and particularly relates to the field of high-molecular compound compositions.
Background
With the development of society, various beverage stores emerge endlessly, straws arranged on beverage cups are discarded at will after being used as disposable articles, currently adopted plastic straws are not easy to degrade in the environment and cause serious white pollution, some merchants convert original plastic straws into paper straws, but the paper straws are easy to deform after being soaked in beverages for a long time, and the paper straws are high in cost, so that development of a degradable low-cost plastic straw is vital.
The Chinese invention patent CN201910880574.5 discloses a preparation method of a high-toughness heat-resistant fully-degradable straw, which improves the melting point of a melt and the heat resistance of a plastic straw by introducing polyhydroxyalkanoate and utilizing a larger molecular weight, but polyhydroxyalkanoate is not easy to synthesize and has a higher preparation cost, and is not suitable for large-scale industrial production. The Chinese invention patent CN201811170069.3 discloses a degradable PLA biomaterial for manufacturing a suction pipe and a preparation method thereof, the polylactic acid resin and the polylactide are subjected to blending reaction to enable the composite material to achieve higher mechanical property, but polyethylene and polypropylene are added for blending, so that the composite material cannot be completely degraded and has certain destructiveness to the environment.
Disclosure of Invention
In order to improve the heat-resistant temperature of the straw material and improve the mechanical property of the straw, the first aspect of the invention provides a high-temperature-resistant biodegradable/desorption pipe material, which comprises the following preparation raw materials in parts by weight: 30-70 parts of lactic acid polymer, 30-70 parts of polydiacid diol ester, 0.1-5 parts of fat-soluble compound, 0.1-3 parts of epoxy polymer, 0.1-1 part of dispersing agent and 3-20 parts of functional additive.
As a preferred embodiment, the preparation raw materials comprise, in parts by weight: 35-65 parts of lactic acid polymer, 35-65 parts of polydiacid dihydric alcohol ester, 0.3-3 parts of fat-soluble compound, 0.3-1.5 parts of epoxy polymer, 0.2-0.5 part of dispersant and 3.2-18 parts of functional additive.
As a preferred embodiment, the preparation raw materials comprise, in parts by weight: 40 parts of lactic acid polymer, 48.5 parts of polydiacid diol ester, 0.3 part of fat-soluble compound, 0.4 part of epoxy polymer, 0.3 part of dispersant and 10.5 parts of functional additive.
In a preferred embodiment, the melting point of the lactic acid polymer is 140-190 ℃, and the mass fraction of the L-polylactic acid in the lactic acid polymer is preferably more than 95%.
In a preferred embodiment, the lactic acid polymer contains L-polylactic acid in an amount of 98% by mass.
In a preferred embodiment, the lactic acid polymer is a high-viscosity resin polymer having a melt index of 3 to 25g/10min at 210 ℃ under a load of 2.16 kg.
In a preferred embodiment, the lactic acid polymer is a high-viscosity resin polymer having a melt index of 4 to 10g/10min at 210 ℃ under a load of 2.16 kg.
In a preferred embodiment, the polyglycol ester is selected from one or more of polybutylene glycol terephthalate, polybutylene succinate, polybutylene terephthalate, and polyethylene adipate.
In a preferred embodiment, the polydiacid diol ester is polybutylene succinate.
In a preferred embodiment, the polybutylene succinate has a melt index of 3 to 25g/10min at 210 ℃ under a load of 2.16 kg.
In a preferred embodiment, the polybutylene succinate has a melt index of 4 to 10g/10min at 210 ℃ under a load of 2.16 kg.
As a preferred embodiment, the fat-soluble compound is selected from one or a combination of more of dibasic acid ester, citric acid ester, epoxy soybean oil, polyol ester and polyester fat-soluble compound.
As a preferred embodiment, the fat-soluble compound is a citrate.
In a preferred embodiment, the epoxy polymer is an epoxy acrylate polymer having a melt index of 25 to 45g/10min at 190 ℃ under a load of 2.16 kg.
The applicant found during experimentation that the incorporation of an epoxy acrylate polymer can improve the tensile properties and flexural strength of the polymer melt, presumably due to: the epoxy acrylate polymer can react with active groups in the small molecular weight polymer by utilizing epoxy groups with higher reactivity to form a high-weight polymer, so that the tensile property and the bending property of the polymer are improved.
In a preferred embodiment, the dispersant is one or a combination of several selected from polyester dispersants, amide dispersants, synthetic ester dispersants, wax dispersants, silicone oil and stearate dispersants.
As a preferred embodiment, the dispersant is an amide dispersant, and preferably, the amide dispersant is ethylene bis-stearic acid amide.
As a preferred embodiment, the functional assistant comprises an inorganic filler and a nucleating agent, and preferably, the particle size of the functional assistant is 500-10000 meshes.
As a preferred embodiment, the weight ratio of the inorganic filler to the nucleating agent is (3 to 15): (0.2-3).
As a preferred embodiment, the weight ratio of the inorganic filler to the nucleating agent is 10:0.5.
as a preferred embodiment, the nucleating agent is selected from one of inorganic nucleating agents, organic nucleating agents and beta-crystal nucleating agents.
As a preferred embodiment, the particle size of the inorganic nucleating agent is 3000 to 10000 meshes.
As a preferred embodiment, the organic nucleating agent is selected from one or more of fatty carboxylic acid metal compounds, sorbierite benzylidene derivatives, organic phosphates, rosin nucleating agents and hydrazide nucleating agents.
As a preferred embodiment, the organic nucleating agent is a hydrazide nucleating agent, and preferably, the organic nucleating agent is sebacic acid dibenzoylhydrazide.
As a preferred embodiment, the inorganic filler is selected from one or a combination of talc, silicate, metal oxide and carbon black.
As a preferred embodiment, the particle size of the inorganic filler is 500 to 3000 mesh.
As a preferred embodiment, the inorganic filler is talc.
The mass fraction of the L-polylactic acid in the polylactic acid is 98%, the L-polylactic acid and the poly (butylene succinate) have synergistic effect, and the introduction of the sebacic acid dibenzoylhydrazide and the talcum powder with the particle size of 500-3000 meshes can improve the heat resistance and the mechanical property of the polymer material, and the probable reason is guessed to be that: the number of isomers of a polymerization monomer in the high-purity polylactic acid is small, the regularity of a formed polymer is high, the heat resistance of a polymer material can be improved under the synergistic effect of the polylactic acid and the polybutylene succinate, the heterogeneous nucleation capability is remarkably improved under the participation of nucleating agents sebacic acid dibenzoylhydrazide and talcum powder, the nucleation density is increased, the crystallinity is improved, and therefore the heat resistance of the polymer material is improved. And the sebacic acid dibenzoylhydrazine and the talcum powder have synergistic effect, so that more crystal nuclei can be provided, the size of spherical crystals is reduced, the crystallization rate is improved, the crystallinity of polylactic acid in a low-temperature environment can be reduced, and the proportion of irregular alpha crystal forms in a polymerization product is reduced, so that the crystallization regularity of the polymer is improved, and the temperature resistance and the impact resistance of the polymer are improved.
The second aspect of the invention provides a preparation method of a high-temperature-resistant biodegradable desorption tube material, which comprises the following steps:
(1) Adding lactic acid polymer and polydiacid dihydric alcohol ester into a mixer, stirring and mixing, adding liposoluble compound, mixing for 30-60s, adding the rest raw materials, and mixing for 5-30min to obtain a mixture;
(2) And (3) conveying the mixture obtained in the step (1) into a double-screw extruder, wherein the temperature of the extruder is 150-250 ℃, the rotating speed of a screw is 200-600r/min, and shearing, bracing, cooling, granulating and drying to obtain the straw material.
As a preferred embodiment, the twin-screw extruder is a parallel twin-screw extruder, the length-to-diameter ratio of the screws is 28 to 50, and the extruder temperature is 150 to 210 ℃. The screw with the length-diameter ratio of 28-50 is adopted, and the extrusion temperature of 150-210 ℃ and the rotating speed of 200-600r/min are kept, so that the double-screw extruder has good dispersion performance, the shearing force is moderate, the stability of the raw materials can be kept, and the advanced degradation caused by excessive shearing is avoided.
The third aspect of the invention provides application of the high-temperature-resistant biodegradable pipe material, and the pipe material can be applied to preparation of a suction pipe of hot beverage.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the high-temperature-resistant biodegradable desorption tube material, the polybutylene succinate and the polylactic acid are blended, and under the synergistic effect of the sebacic acid dibenzoyl hydrazine and the talcum powder, the crystallization regularity of a polymer is improved, and the heat resistance of the suction tube material is improved.
(2) According to the high-temperature-resistant biodegradable/desorption pipe material, the low-molecular-weight polymer is copolymerized and connected by introducing the epoxy polymer, so that the mechanical property of a straw material melt is improved, and the tensile property, the bending resistance and the impact resistance of the straw material are improved.
(3) According to the high-temperature-resistant biodegradable desorption tube material, the functional auxiliary agent can be uniformly dispersed in a melt by adding the sebacic acid dibenzoylhydrazide and the talcum powder with the particle size of 500-3000 meshes, and meanwhile, the stability of the material is improved and the advanced degradation of the composite material is avoided by adopting the parallel double-screw extruder with the length-diameter ratio of 28-50.
Detailed Description
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
A high-temperature-resistant biodegradable desorption tube material comprises the following preparation raw materials in parts by weight: 40 parts of lactic acid polymer, 48.5 parts of polydiacid diol ester, 0.3 part of fat-soluble compound, 0.4 part of epoxy polymer, 0.3 part of dispersant and 10.5 parts of functional additive.
The melting point of the lactic acid polymer is 165 ℃, wherein the mass fraction of the L-polylactic acid is 98%, the melt index under the load of 2.16kg at 210 ℃ is 7g/10min, and the L-polylactic acid polymer is purchased from Dadalco Bien and has the model number of LX575.
The poly dibasic acid diol ester is poly butylene succinate, has a melt index of 5g/10min at 210 ℃ under a load of 2.16kg, is purchased from Thailand PTT, and has the model number of FZ91.
The fat-soluble compound is citrate, purchased from Jiangsu Remeng, and is LM30.
The epoxy polymer is an epoxy acrylate polymer, has a melt index of 35g/10min at 190 ℃ under a load of 2.16kg, is available from China and is easy to prepare, and the model is SG-20.
The dispersant is ethylene bis stearamide, purchased from Huawang and having the model number of EBFF.
The functional auxiliary agent comprises inorganic filler and nucleating agent, and the weight ratio is 10:0.5, the inorganic filler is talcum powder with the grain size of 3000 meshes, is purchased from Dongli chemical engineering Co., ltd, suzhou and has the model number of T6; the nucleating agent is sebacic acid dibenzoyl hydrazine which is purchased from Shanxi chemical research institute and has the model of TMC-300.
A preparation method of a high-temperature-resistant biodegradable desorption tube material comprises the following steps:
(1) Adding lactic acid polymer and polydiacid dihydric alcohol ester into a mixer, stirring and mixing, adding fat-soluble compound, mixing for 30s, adding the rest raw materials, and mixing for 30min to obtain a mixture;
(2) And (3) conveying the mixture obtained in the step (1) into a double-screw extruder, wherein the temperature of the extruder is 180 ℃, the rotating speed of a screw is 450r/min, and shearing, bracing, cooling, granulating and drying to obtain the straw material.
Example 2
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the differences are that the preparation raw materials comprise the following components in parts by weight: 30.5 parts of lactic acid polymer, 65 parts of polydiacid dihydric alcohol ester, 0.3 part of fat-soluble compound, 0.5 part of epoxy polymer, 0.2 part of dispersant and 3.5 parts of functional auxiliary agent.
The functional auxiliary agent comprises an inorganic filler and a nucleating agent, and the weight ratio is 3:0.5.
example 3
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the differences are that the preparation raw materials comprise the following components in parts by weight: 46 parts of lactic acid polymer, 35 parts of polydiacid dihydric alcohol ester, 1.5 parts of fat-soluble compound, 1.5 parts of epoxy polymer, 0.5 part of dispersant and 15.5 parts of functional auxiliary agent.
The dibasic acid glycol ester is polybutylene succinate which is purchased from Xinjiang blue tunny river and has the model number of TH803S.
The functional auxiliary agent comprises inorganic filler and nucleating agent, and the weight ratio is 15:0.5.
example 4
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the differences are that the preparation raw materials comprise the following components in parts by weight: 62.3 parts of lactic acid polymer, 34 parts of polydiacid dihydric alcohol ester, 3 parts of fat-soluble compound, 0.3 part of epoxy polymer, 0.2 part of dispersant and 0.2 part of functional auxiliary agent.
The functional assistant is a nucleating agent dibenzoylhydrazide sebacate, which is purchased from Shanxi chemical research institute and has the model of TMC-300.
Example 5
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the difference is that the functional auxiliary agent comprises an inorganic filler and a nucleating agent, and the weight ratio is 7.5:3; the inorganic filler is talcum powder with the grain diameter of 3000 meshes, is purchased from east-Li chemical engineering Co., ltd, suzhou and has the model number of T6; the nucleating agent is inorganic nucleating agent talcum powder, has the grain diameter of 8000 meshes and is purchased from Shanghai Huizi sub-nanometer new material company Limited.
Example 6
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the differences are that the preparation raw materials comprise the following components in parts by weight: 84.8 parts of lactic acid polymer, 15 parts of polydiacid dihydric alcohol ester and 0.2 part of dispersing agent.
The lactic acid polymer is purchased from Anhui Fengyuan and is of the type FY804.
The dibasic acid glycol ester is polybutylene succinate which is purchased from Xinjiang blue tunny river and has the model number of TH803S.
Example 7
The specific steps of the high-temperature-resistant biodegradable desorption tube material are the same as those of example 1, and the differences are that the preparation raw materials comprise the following components in parts by weight: 64 parts of lactic acid polymer, 20 parts of polybutylene terephthalate-adipate, 0.2 part of epoxy polymer, 0.3 part of dispersant and 15.5 parts of functional additive.
The lactic acid polymer is purchased from Anhui Fengyuan and has the model number of FY804; polybutylene terephthalate-adipate, available from Xinjiang blue Tunghe, was model TH801T.
The functional auxiliary agent comprises inorganic filler and nucleating agent, and the weight ratio is 15:0.5.
performance test
1. Melt index: the melt index was measured according to GB/T19466 using a melt index tester at 190 ℃ under a load of 2.16 kg.
2. Vicat softening point: and testing the Vicat softening point by adopting a Vicat tester according to the GB/T1633 standard.
3. Tensile strength: the tensile strength of the prepared straw material is tested according to the GB/T1040 standard.
4. Elongation at break: the elongation at break of the prepared straw material is tested according to the GB/T1040 standard.
4. Bending strength: the bending strength of the prepared straw material is tested according to the GB/T9341 standard.
5. Flexural modulus: the flexural modulus of the prepared straw material is tested according to the GB/T9341 standard.
6. Notched impact strength: and testing the notch impact strength of the prepared straw material according to the GB/T1043 standard.
The tests were carried out according to the above criteria and the results are given in table 1.
TABLE 1
Claims (10)
1. The high-temperature-resistant biodegradable desorption tube material is characterized by comprising the following preparation raw materials in parts by weight: 30-70 parts of lactic acid polymer, 30-70 parts of polydiacid dihydric alcohol ester, 0.1-5 parts of fat-soluble compound, 0.1-3 parts of epoxy polymer, 0.1-1 part of dispersant and 3-20 parts of functional additive.
2. The high-temperature-resistant biodegradable/desorbent pipe material as claimed in claim 1, wherein the melting point of the lactic acid polymer is 140-190 ℃, and preferably, the mass fraction of the L-polylactic acid in the lactic acid polymer is more than 95%.
3. The high-temperature-resistant biodegradable desorption tube material as claimed in claim 1 or 2, wherein the lactic acid polymer is a high-viscosity resin polymer, and the melt index at 210 ℃ and under a load of 2.16kg is 3-25g/10min.
4. The high temperature resistant biodegradable desorption tube stock as claimed in claim 1 or 2, wherein the poly dibasic acid glycol ester is selected from one or more of polybutylene glycol adipate, polybutylene succinate, polybutylene terephthalate and polyethylene adipate.
5. The high temperature resistant biodegradable desorption tube material of claim 4, wherein the melt index of the poly (butylene succinate) at 210 ℃ under a load of 2.16kg is 3-25g/10min.
6. The high temperature resistant biodegradable tubing set of claim 1, wherein the fat soluble compound is selected from one or more of dibasic acid ester, citric acid ester, epoxy soybean oil, polyol ester, and polyester fat soluble compound.
7. The high-temperature-resistant biodegradable desorption tube material as claimed in claim 1, wherein the epoxy polymer is an epoxy acrylate polymer, and the melt index at 190 ℃ under a load of 2.16kg is 25-45g/10min.
8. The high temperature resistant biodegradable tubing as defined in claim 1, wherein the dispersant is selected from one or more of polyester dispersant, amide dispersant, synthetic ester dispersant, wax dispersant, silicone oil, and stearate dispersant.
9. A method for preparing a refractory biodegradable tubular feedstock according to any one of claims 1-8, comprising the steps of:
(1) Adding lactic acid polymer and polydiacid dihydric alcohol ester into a mixer, stirring and mixing, adding liposoluble compound, mixing for 30-60s, adding the rest raw materials, and mixing for 5-30min to obtain a mixture;
(2) And (3) conveying the mixture obtained in the step (1) into a double-screw extruder, wherein the temperature of the extruder is 150-250 ℃, the rotating speed of a screw is 200-600r/min, and shearing, bracing, cooling, granulating and drying to obtain the straw material.
10. Use of a refractory biodegradable straw according to any of claims 1 to 8, for the preparation of a straw for hot beverages.
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| CN113801450A (en) * | 2021-11-10 | 2021-12-17 | 晋江市新迪新材料科技有限公司 | Full-biodegradable modified plastic for high-temperature-resistant extrusion straw product and preparation method thereof |
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