CN116945700B - Inorganic biodegradable extrusion hose and manufacturing method thereof - Google Patents

Inorganic biodegradable extrusion hose and manufacturing method thereof Download PDF

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Publication number
CN116945700B
CN116945700B CN202310970120.3A CN202310970120A CN116945700B CN 116945700 B CN116945700 B CN 116945700B CN 202310970120 A CN202310970120 A CN 202310970120A CN 116945700 B CN116945700 B CN 116945700B
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parts
inner layer
outer layer
hose
powder
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CN116945700A (en
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张明体
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Guangdong Aoxinmei Packaging Technology Co.,Ltd.
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Guangzhou Aoxinmei Plastic Co ltd
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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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/321—Phosphates
    • 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
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses an inorganic biodegradable extrusion hose which is characterized by comprising an inner layer, an intermediate layer and an outer layer, wherein the main components of the hose are calcium carbonate powder, degradable organic polymer materials and the like, and the manufacturing method comprises the following steps: (1) Respectively and uniformly mixing the inner layer raw material, the middle layer raw material and the outer layer raw material; (2) respectively melting and banburying the mixed materials; (3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material; (4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, and cutting to the required size to obtain the extruded hose. The hose prepared by the invention has excellent performance, good degradation performance and wide application range, and can be used in the industries of medical treatment, cosmetics, food, chemical industry and the like.

Description

Inorganic biodegradable extrusion hose and manufacturing method thereof
Technical Field
The invention relates to the field of hose manufacturing, in particular to an inorganic biodegradable extrusion hose and a manufacturing method thereof.
Background
The plastic hose has the advantages of light weight, stable chemical property, good formability and impact resistance, low processing cost and the like, and is widely applied to aspects of production and life.
At present, most hoses used for hoses of cosmetics, foods, medicines, toothpaste and the like are formed by extrusion and stamping of Polyethylene (PE), and most of the hoses contain substances such as adhesives, glue and the like, so that the hose is environment-friendly, complex in process, high in cost, easy to crack and delaminate and poor in degradation performance.
CN 114523745 discloses a three-layer co-extrusion structure, the outer layer and the inner layer are made of PE plastic, the sanitation meets the product requirement, the middle layer is made of RPE (recycled waste plastic), the cost is saved, the environment is protected, the middle layer is not contacted with the content of the product, the quality of the product is not affected, the outer layer is made of brand-new PE material, the surface is smooth, patterns and characters are convenient to print, the printing is generally performed by a flexo printing machine, the printing precision is high, the plate adjusting speed is high, the printing speed is high, the production efficiency is greatly improved, the cost is saved, but the degradability is still poor.
Disclosure of Invention
The invention aims to provide an inorganic biodegradable extrusion hose and a manufacturing method thereof, and the hose prepared by the invention has excellent performance, good degradation performance and wide application range, and can be used in industries such as medical treatment, cosmetics, food, chemical industry and the like.
In order to achieve the above object, in a first aspect, the present invention provides an inorganic biodegradable extrusion hose comprising an inner layer, an intermediate layer and an outer layer,
the outer layer consists of the following components in parts by mass:
20-30 parts of calcium carbonate powder
1-2 parts of sodium silicate
0.2 to 0.3 part of white carbon black
30-40 parts of polylactic acid
10-15 parts of polybutylene succinate
1 to 3 parts of lignin
0.2 to 1 part of auxiliary agent
The sodium silicate component is added into the outer layer material, so that the fire resistance of the outer wall of the hose can be improved, and the application field of the hose can be increased;
the inner layer consists of the following components in parts by mass:
20-30 parts of calcium carbonate powder
0.2 to 0.3 part of white carbon black
10-25 parts of polylactic acid
0.3 to 1 part of mixed powder of sodium dihydrogen phosphate and sodium hydrogen phosphate
0.3 to 1 part of polybutylene succinate
0.5 to 2 portions of aramid 1313
0.2 to 1 part of auxiliary agent
Sodium dihydrogen phosphate and sodium hydrogen phosphate are added into the inner layer material, and because the inner layer material has great buffering performance on liquids with different pH values, the application scene of the inner layer material is widened, the inner layer material is suitable for acidic and alkaline environments, and aramid 1313 is added into the inner layer material, so that the heat resistance of the inner layer pipe is enhanced.
The intermediate layer consists of the following components in parts by mass:
10-15 parts of calcium carbonate powder
0.2 to 0.3 part of white carbon black
10-25 parts of polylactic acid
1-2 parts of quicklime powder
5-10 parts of polybutylene succinate
0.2 to 1 part of auxiliary agent
The quicklime powder is added into the middle layer material, so that the quicklime can be converted into the slaked lime in the natural degradation process at the end of the service life of the hose, the degradation of the slaked lime is accelerated, and the degradation period is reduced.
Further, the particle size of the calcium carbonate powder is between 1 and 30 microns. The optimal particle size of the calcium carbonate powder particles is between 1 and 3 microns, but the cost is too high, and the calcium carbonate powder particles can be used in the application field of high end.
Further, the thickness ratio of the inner layer to the middle layer to the outer layer is 2-3:1-1.5:2-4.
Further, the auxiliary agent is triphenyl phosphate or trioctyl phosphate, and the effect is better by adopting trioctyl phosphate.
Further, the particle size of the quicklime powder is between 1 and 50 microns. When the particle size of the quicklime powder is selected between 1 and 50 microns, the larger particle size is adopted, and the degradation performance of the hose is better.
Further, the particle sizes of the sodium dihydrogen phosphate powder and the sodium hydrogen phosphate powder are between 1 and 20 microns, and the mass ratio of the sodium dihydrogen phosphate powder to the sodium hydrogen phosphate powder is 1:1-3.
The invention also provides a manufacturing method of the extrusion hose, which comprises the following steps:
(1) Respectively adding the inner layer raw material, the middle layer raw material and the outer layer raw material into three independent mixing kettles according to respective proportions, stirring at a high speed, and uniformly mixing;
(2) Respectively adding the materials mixed in the three independent mixing kettles in the step (1) into three machine barrels for melting and banburying, and controlling the temperature between 150 ℃ and 250 ℃;
(3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material;
(4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, and cutting to the required size to obtain the extruded hose.
Further, in the sizing, molding and cooling process in the step (4), the temperature is controlled between 25 ℃ and 45 ℃.
Further, in the step (2), the melting and banburying temperature of the outer layer mixing kettle is controlled to be 150-220 ℃, the melting and banburying temperature of the middle layer mixing kettle is controlled to be 170-220 ℃, and the melting and banburying temperature of the inner layer mixing kettle is controlled to be 180-240 ℃.
Further, in the step (1), the temperature is controlled between 25 ℃ and 60 ℃ in the material mixing process, and meanwhile, vacuum dehydration is adopted to remove water in the raw materials.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, but is apparent to those skilled in the art in view of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
An inorganic biodegradable extrusion hose is characterized by comprising an inner layer, an intermediate layer and an outer layer,
the outer layer consists of the following components in parts by mass:
20 parts of calcium carbonate powder with the grain diameter of 15-30 microns
Sodium silicate 1 part
White carbon black 0.2 part
Polylactic acid 30 parts
10 parts of polybutylene succinate
Lignin 1 part
Triphenyl phosphate 0.2 part
The inner layer consists of the following components in parts by mass:
20 parts of calcium carbonate powder with the grain diameter of 15-30 microns
White carbon black 0.2 part
Polylactic acid 10 parts
0.3 part of mixed powder of sodium dihydrogen phosphate and sodium hydrogen phosphate, wherein the mass ratio of the former to the latter is 1:1
0.3 part of polybutylene succinate
Aramid 1313.5 parts
Triphenyl phosphate 0.2 part
The intermediate layer consists of the following components in parts by mass:
10 parts of calcium carbonate powder has the grain diameter of 15-30 microns
White carbon black 0.2 part
Polylactic acid 10 parts
1 part of quicklime powder has the grain size of 1-25 microns
Polybutylene succinate 5 parts
Triphenyl phosphate 0.2 part
The thickness ratio of the inner layer, the middle layer and the outer layer is 2:1:2.
The preparation process comprises the following steps:
(1) Respectively adding the inner layer raw material, the middle layer raw material and the outer layer raw material into three independent mixing kettles according to respective proportions, stirring at a high speed, uniformly mixing, controlling the temperature in the material mixing process to be between 25 and 40 ℃, and simultaneously removing water in the raw materials by adopting vacuum dehydration;
(2) Respectively adding the materials mixed in the three independent mixing kettles in the step (1) into three machine barrels for melting and banburying, wherein the melting and banburying temperature of the outer layer mixing kettles is controlled between 150 ℃ and 220 ℃, the melting and banburying temperature of the middle layer mixing kettles is controlled between 170 ℃ and 220 ℃, and the melting and banburying temperature of the inner layer mixing kettles is controlled between 180 ℃ and 240 ℃;
(3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material;
(4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, controlling the temperature between 25 ℃ and 45 ℃, and cutting to the required size to obtain the extruded hose.
Example 2
An inorganic biodegradable extrusion hose is characterized by comprising an inner layer, an intermediate layer and an outer layer,
the outer layer consists of the following components in parts by mass:
30 parts of calcium carbonate powder has a particle size of 1-3 microns
Sodium silicate 2 parts
White carbon black 0.3 part
Polylactic acid 40 parts
15 parts of polybutylene succinate
Lignin 3 parts
Trioctyl phosphate 1 part
The inner layer consists of the following components in parts by mass:
30 parts of calcium carbonate powder has a particle size of 1-3 microns
White carbon black 0.3 part
25 parts of polylactic acid
1 part of mixed powder of sodium dihydrogen phosphate and sodium hydrogen phosphate, wherein the mass ratio of the former to the latter is 1:3
Polybutylene succinate 1 part
Aramid 1313 parts
Trioctyl phosphate 1 part
The intermediate layer consists of the following components in parts by mass:
10 parts of calcium carbonate powder has a particle size of 1-3 microns
White carbon black 0.3 part
25 parts of polylactic acid
2 parts of quicklime powder with the grain diameter of 25-50 microns
8 parts of polybutylene succinate
Trioctyl phosphate 1 part
The thickness ratio of the inner layer, the middle layer and the outer layer is 3:1.5:4.
The preparation process comprises the following steps:
(1) Respectively adding the inner layer raw material, the middle layer raw material and the outer layer raw material into three independent mixing kettles according to respective proportions, stirring at a high speed, uniformly mixing, controlling the temperature in the material mixing process to be 45-60 ℃, and simultaneously removing water in the raw materials by adopting vacuum dehydration;
(2) Respectively adding the materials mixed in the three independent mixing kettles in the step (1) into three machine barrels for melting and banburying, wherein the melting and banburying temperature of the outer layer mixing kettles is controlled between 150 ℃ and 220 ℃, the melting and banburying temperature of the middle layer mixing kettles is controlled between 170 ℃ and 220 ℃, and the melting and banburying temperature of the inner layer mixing kettles is controlled between 180 ℃ and 240 ℃;
(3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material;
(4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, controlling the temperature between 25 ℃ and 45 ℃, and cutting to the required size to obtain the extruded hose.
Example 3
An inorganic biodegradable extrusion hose is characterized by comprising an inner layer, an intermediate layer and an outer layer,
the outer layer consists of the following components in parts by mass:
25 parts of calcium carbonate powder has the grain diameter of 10-15 microns
Sodium silicate 2 parts
White carbon black 0.3 part
Polylactic acid 35 parts
12 parts of polybutylene succinate
Lignin 2 parts
Trioctyl phosphate 1 part
The inner layer consists of the following components in parts by mass:
30 parts of calcium carbonate powder has the grain diameter of 10-15 microns
White carbon black 0.3 part
Polylactic acid 20 parts
0.5 part of mixed powder of sodium dihydrogen phosphate and sodium hydrogen phosphate, wherein the mass ratio of the former to the latter is 1:1
Polybutylene succinate 1 part
Aramid 1313.5 parts
Trioctyl phosphate 0.5 part
The intermediate layer consists of the following components in parts by mass:
12 parts of calcium carbonate powder with the grain diameter of 10-15 microns
White carbon black 0.3 part
Polylactic acid 20 parts
2 parts of quicklime powder with the grain diameter of 1-25 microns
8 parts of polybutylene succinate
Trioctyl phosphate 1 part
The thickness ratio of the inner layer, the middle layer and the outer layer is 3:1.5:4.
The preparation process comprises the following steps:
(1) Respectively adding the inner layer raw material, the middle layer raw material and the outer layer raw material into three independent mixing kettles according to respective proportions, stirring at a high speed, uniformly mixing, controlling the temperature in the material mixing process to be 45-50 ℃, and simultaneously removing water in the raw materials by adopting vacuum dehydration;
(2) Respectively adding the materials mixed in the three independent mixing kettles in the step (1) into three machine barrels for melting and banburying, wherein the melting and banburying temperature of the outer layer mixing kettles is controlled between 150 ℃ and 220 ℃, the melting and banburying temperature of the middle layer mixing kettles is controlled between 170 ℃ and 220 ℃, and the melting and banburying temperature of the inner layer mixing kettles is controlled between 180 ℃ and 240 ℃;
(3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material;
(4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, controlling the temperature between 25 ℃ and 45 ℃, and cutting to the required size to obtain the extruded hose.
Comparative example 1
The sodium silicate in the outer layer material of example 2 was removed, and the details are not repeated in the same manner as in example 2.
Comparative example 2
The quicklime powder in the interlayer material of example 2 was removed, and the details thereof are not repeated in the same manner as in example 2.
Comparative example 3
The aramid 1313 in the inner layer material of example 2 was removed, and the details are not repeated in the same manner as in example 2.
Performance testing
The hoses prepared in the above examples and comparative examples were subjected to performance tests, and the test results are shown in table 1.
TABLE 1 Performance test results
As can be seen from the data in the table, the addition of sodium silicate component in the outer layer material can increase the fire resistance of the outer wall of the hose and improve the fire resistance of the hose; the quicklime powder is added into the middle layer material, so that the quicklime can be converted into the slaked lime in the natural degradation process at the end of the service life of the hose, the degradation of the slaked lime is accelerated, and the degradation period is reduced; the aramid fiber 1313 is added into the inner layer material, so that the heat resistance of the inner layer pipe is enhanced, and the flame retardance of the hose is improved.

Claims (7)

1. An inorganic biodegradable extrusion hose is characterized by comprising an inner layer, an intermediate layer and an outer layer,
the outer layer consists of the following components in parts by mass:
20-30 parts of calcium carbonate powder
1-2 parts of sodium silicate
0.2 to 0.3 part of white carbon black
30-40 parts of polylactic acid
10-15 parts of polybutylene succinate
1-3 parts of lignin
0.2-1 part of auxiliary agent
The inner layer consists of the following components in parts by mass:
20-30 parts of calcium carbonate powder
0.2 to 0.3 part of white carbon black
10-25 parts of polylactic acid
0.3-1 part of sodium dihydrogen phosphate and sodium hydrogen phosphate mixed powder
0.3-1 part of polybutylene succinate
0.5-2 parts of aramid 1313
0.2-1 part of auxiliary agent
The intermediate layer consists of the following components in parts by mass:
10-15 parts of calcium carbonate powder
0.2 to 0.3 part of white carbon black
10-25 parts of polylactic acid
1-2 parts of quicklime powder
5-10 parts of polybutylene succinate
0.2-1 part of an auxiliary agent;
the auxiliary agent is trioctyl phosphate;
the particle sizes of the sodium dihydrogen phosphate powder and the sodium hydrogen phosphate powder are 1-20 microns, and the mass ratio of the sodium dihydrogen phosphate powder to the sodium hydrogen phosphate powder is 1:1-3;
the thickness ratio of the inner layer to the middle layer to the outer layer is 2-3:1-1.5:2-4.
2. The extruded hose of claim 1, wherein the calcium carbonate powder has a particle size of between 1 and 30 microns.
3. The extrusion hose of claim 1, wherein the quicklime powder has a particle size of between 1 and 50 microns.
4. A method of manufacturing the extruded hose according to any one of claims 1 to 3, comprising the steps of:
(1) Respectively adding the inner layer raw material, the middle layer raw material and the outer layer raw material into three independent mixing kettles according to respective proportions, stirring at a high speed, and uniformly mixing;
(2) Respectively adding the materials mixed in the three independent mixing kettles in the step (1) into three machine barrels for melting and banburying, and controlling the temperature between 150 ℃ and 250 ℃;
(3) Respectively extruding and molding the materials after the internal mixing in the step (2) through three extruders to obtain an inner layer material, an intermediate layer material and an outer layer material;
(4) And (3) carrying out multilayer coextrusion on the inner layer material, the middle layer material and the outer layer material in the step (3) by adopting a multilayer composite die, sizing, shaping, cooling, and cutting to the required size to obtain the extruded hose.
5. The method according to claim 4, wherein the temperature is controlled between 25 ℃ and 45 ℃ during the sizing and cooling in step (4).
6. The method according to claim 4, wherein in the step (2), the melting and banburying temperature of the outer layer mixing kettle is controlled to be 150-220 ℃, the melting and banburying temperature of the middle layer mixing kettle is controlled to be 170-220 ℃, and the melting and banburying temperature of the inner layer mixing kettle is controlled to be 180-240 ℃.
7. The method according to claim 4, wherein the temperature is controlled to be 25-60 ℃ during the mixing of the materials in the step (1), and the water in the raw materials is removed by vacuum dehydration.
CN202310970120.3A 2023-08-03 2023-08-03 Inorganic biodegradable extrusion hose and manufacturing method thereof Active CN116945700B (en)

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