CN110669278A

CN110669278A - Pipe for effectively reducing condensate water of breathing pipeline

Info

Publication number: CN110669278A
Application number: CN201911123563.9A
Authority: CN
Inventors: 吴玉平
Original assignee: Sleda Medical Supplies Huizhou Co Ltd
Current assignee: Sleda Medical Supplies Huizhou Co Ltd
Priority date: 2019-11-17
Filing date: 2019-11-17
Publication date: 2020-01-10
Anticipated expiration: 2039-11-17
Also published as: CN110669278B

Abstract

The invention discloses a pipe for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 85-105 parts of thermoplastic material, 0.5-5 parts of microsphere foaming agent and 1-8 parts of silicone oil. Experimental test results show that the pipe for effectively reducing the condensed water of the breathing pipeline, which is prepared by the invention, has the advantages of good mechanical properties such as heat insulation property, tensile strength and elongation at break, and excellent hydrophobic property, so that tiny water drops can be more easily conveyed to a patient along with gas, and the formation of the condensed water is reduced while the sealing property of the pipe is ensured. In addition, the materials used in the invention are all safe and environment-friendly materials, physical foaming is adopted, the foaming can be carried out under normal pressure and pressurization, the foaming process is simple and convenient, and the large-scale industrial production is facilitated.

Description

Pipe for effectively reducing condensate water of breathing pipeline

Technical Field

The invention relates to the field of medical materials, in particular to a pipe for effectively reducing condensed water of a breathing pipeline.

Background

Medical breathing equipment such as a respirator and the like, which is used as core life support equipment, plays an important role in clinical anesthesia and breathing management, respiratory failure treatment, critical patient rescue and resuscitation.

The respiratory pipeline in the respiratory equipment is mainly of a long and thin tubular cavity structure, and gas with the saturation humidity of more than 30 ℃ is conveyed in the pipeline, so that condensed water is easily attached to the interior of the pipeline, the risk that the condensed water flows back into a respiratory tract is possibly caused, the related pneumonia of a breathing machine is also caused, and huge potential safety hazards are caused to hospitals and patients. In the prior art, in order to prevent the generation of condensed water in a breathing pipeline, a heating wire is often added in the breathing pipeline or a heat insulation test is wrapped outside the breathing pipeline to keep the interior of the breathing pipeline dry, but the medical cost is increased, the loss of the breathing pipeline is increased, and many unsafe factors are brought. Meanwhile, the breathing pipeline in the prior art also has insufficient tensile strength and elongation at break, so that the accident of breathing pipeline breakage is likely to happen in the equipment transportation process or the patient use process, and the safety of patients is affected. Therefore, it is desirable to develop a tube for effectively reducing the amount of condensed water in the respiratory tract.

Disclosure of Invention

In order to solve the technical problems, the invention provides a tube for effectively reducing the condensed water in a breathing pipeline, which comprises the following raw materials in parts by weight: 85-105 parts of thermoplastic material, 0.5-5 parts of microsphere foaming agent and 1-8 parts of silicone oil.

As a preferable technical scheme, the thermoplastic material is selected from one or more of PP material, LDPE material, LLDPE material, EVA material, PE material and PVC material.

As a preferable technical scheme, the melt index of the LDPE material at 230 ℃ and 2.16kg is 3.0-7.0 g/10 min.

As a preferable technical scheme, the melt index of the EVA material at 200 ℃ and 5kg is 1.0-4.0 g/10 min.

As a preferable technical scheme, the EVA material is an EVA material with VAC content of 15-20 wt%.

As a preferable technical scheme, the particle size of the microsphere foaming agent is 5-30 microns.

As a preferable technical scheme, the silicone oil is selected from one or more of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil, hydrogen-containing silicone oil and modified silicone oil.

As a preferable technical scheme, the viscosity of the methyl silicone oil at 25 ℃ is 340-360 cst.

As a preferable technical scheme, the weight ratio of the modified silicone oil to the methyl silicone oil is 1: (1-2).

The second aspect of the present invention provides a method for preparing the tube material for effectively reducing the condensed water in the breathing circuit, comprising the following steps:

the method comprises the following steps: adding the thermoplastic material and the silicone oil into a stirrer according to the parts by weight, and uniformly mixing at a stirring speed of 800-900 r/min at 130-140 ℃ to obtain a mixed material;

step two: and (3) adding a microsphere foaming agent into the mixed material obtained in the step one, and mixing for 1-2 hours at 130-200 ℃ and 0-15 MPa to obtain the pipe material for effectively reducing the condensed water of the breathing pipeline.

Has the advantages that: the invention mainly uses thermoplastic material, microsphere foaming agent and silicone oil to prepare the pipe material capable of effectively reducing the condensed water of the breathing pipeline. Experimental test results show that the pipe material for effectively reducing the condensed water of the breathing pipeline, which is prepared by the invention, has excellent mechanical properties such as tensile strength, elongation at break and the like, and good heat insulation property, has a heat preservation function on hot humid gas passing through the breathing pipeline, and reduces the formation of the condensed water; meanwhile, the water-repellent hose has excellent hydrophobic property, so that tiny water drops can be more easily conveyed to a patient along with gas, and the formation of condensed water is further reduced while the sealing property of the hose is ensured. In addition, the materials used in the invention are all safe and environment-friendly materials, physical foaming is adopted, the foaming can be carried out under normal pressure and pressurization, the foaming process is simple and convenient, and the large-scale industrial production is facilitated.

Detailed Description

The technical features of the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, and the scope of protection is not limited thereto.

The words "preferred", "more preferred", and the like, in the present invention refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

In a preferred embodiment, the tubing for effectively reducing the condensation water of the breathing circuit comprises the following raw materials in parts by weight: 93-97 parts of thermoplastic material, 1-2 parts of microsphere foaming agent and 2-5 parts of silicone oil.

In a more preferred embodiment, the tubing for effectively reducing the condensation water in the respiratory tract comprises the following raw materials in parts by weight: 95 parts of thermoplastic material, 1.5 parts of microsphere foaming agent and 3.5 parts of silicone oil.

< thermoplastic Material >

Thermoplastic materials are a class of materials that are plastic at a certain temperature, solidify upon cooling, and repeat this process.

In a preferred embodiment, the thermoplastic material is selected from one or more combinations of PP, LDPE, LLDPE, EVA, PE and PVC materials.

(PP Material)

PP material, i.e. polypropylene material, english name polypropylene, is a polymer material prepared by propylene addition polymerization.

In some embodiments, the thermoplastic material is a PP material.

The PP material is K8003 of Taiwan chemical fiber GmbH.

(LDPE Compound)

The LDPE material, i.e. Low density polyethylene, also called high pressure polyethylene, and its english name is Low density polyethylene, is the lightest variety of polyethylene resin, and has good flexibility, extensibility, electrical insulation, transparency, easy processability and certain air permeability.

(LLDPE batch)

LLDPE (Linear low density polyethylene), which is a polyethylene resin with higher softening temperature and melting temperature, has the advantages of high strength, good toughness, high rigidity, good heat resistance and cold resistance and the like.

In some embodiments, the thermoplastic material is a mixture of a LDPE material and a LLDPE material.

In a preferred embodiment, the weight ratio of the LDPE material to the LLDPE material in the thermoplastic material is 1: (0.5 to 1.5).

In a more preferred embodiment, the thermoplastic material has a weight ratio of LDPE material to LLDPE material of 1: 1.

the LDPE material is F410-7 of Singapore polyolefin private company Limited.

The LLDPE material is 7144 petrochemical in Guangzhou.

(EVA Material)

EVA material, ethylene-vinyl acetate copolymer, CAS number 24937-78-8, is a general purpose high molecular polymer.

In some embodiments, the thermoplastic material is a mixture of a LDPE material and an EVA material.

In a preferred embodiment, the weight ratio of the LDPE material to the EVA material in the thermoplastic material is 1: (0.1-0.5).

In a more preferred embodiment, the weight ratio of the LDPE material to the EVA material in the thermoplastic material is 1: 0.31.

in a preferred embodiment, the LDPE material has a melt index of 3.0 to 7.0g/10min at 230 ℃ under 2.16 kg.

In a more preferred embodiment, the LDPE feed has a melt index of 5.0g/10min at 230 ℃ under 2.16 kg.

The LDPE material is F410-7 of Singapore polyolefin private company Limited, and the melt index is 5.0g/10 min.

In a preferred embodiment, the melt index of the EVA material at 200 ℃ and 5kg is 1.0-4.0 g/10 min.

In a more preferred embodiment, the EVA material has a melt index of 1.5g/10min at 200 ℃ and 5 kg.

In a preferred embodiment, the EVA material is EVA material with VAC content of 15-20 wt%.

In a more preferred embodiment, the EVA material is an EVA material having a VAC content of 16 wt%.

The EVA material was 630 from Toyo Boseki Kabushiki Kaisha, melt index was 1.5g/10min, and VAC content was 16 wt%.

The Melt index, i.e. the Melt flow index or Melt flow rate, known by the english name Melt FlowIndex (MI), is a value that indicates the flowability of a plastic material during processing. The melt index can be measured by techniques well known to those skilled in the art, such as ASTM-1238.

The EVA material of the present invention has VAC content, i.e., vinyl acetate content. The test method may be a method known to those skilled in the art, such as nuclear magnetic resonance.

The applicant finds that in the process of preparing the suction pipeline condensed water pipe, the mechanical property of the obtained pipe is greatly influenced due to the difference between the physical and chemical properties of the raw materials, particularly because the obtained pipe is a foaming material, and the foaming degree, the uniformity and the like of the pipe directly influence the mechanical property of the material. The applicant finds that when the thermoplastic material is low-density polyethylene (LDPE material) and ethylene-vinyl acetate copolymer (EVA material), the melt index of the LDPE material is 3.0-7.0 g/10min, and the melt index of the EVA material is 1.0-3.5 g/10min, the mechanical property of the pipe is improved to a certain extent. On the premise of determining the parameters, when the VAC content in the EVA material is further regulated and controlled to be within the range of 15-20 wt%, the tensile strength and the elongation at break of the pipe are remarkably improved. The applicant speculates that under the above melt index condition, the entanglement degree between the polyethylene chain segment part in the molecular chain of the EVA material and the polymer chain segment part of the LDPE material is increased, a plurality of entanglement points are formed in the polymer mixed material, and the tensile stress is absorbed, so that the tensile strength is improved. Under the conditions, when the VAC content in the EVA material is within the range of 15-20 wt%, the EVA material is beneficial to adjusting the content proportion between a vinyl acetate polar chain segment and an ethylene nonpolar chain segment in a mixture to achieve reasonable balance, so that the potential barrier to be overcome by mutual diffusion and entanglement between the EVA material molecular chain segment and the LDPE material molecular chain segment is reduced, the raw materials can be more fully dispersed and entangled, the size structure can be well stabilized in the foaming deformation process, the good stability is ensured, the internal defect caused by foaming is avoided, and the mechanical strength is remarkably improved.

< microsphere foaming agent >

The microsphere foaming agent is a novel foaming agent of micro spherical particles.

In a preferred embodiment, the particle size of the microsphere foaming agent is 5-30 μm.

In a more preferred embodiment, the particle size of the microsphere foaming agent is 17.5 μm.

In a preferred embodiment, the foaming temperature of the microsphere foaming agent is 130-200 ℃.

In a more preferred embodiment, the microsphere foaming agent has a foaming temperature of 165 ℃.

The invention is not particularly limited with respect to the manufacturer and type of microsphere blowing agents, such as FARIDA TEP-158 or FARIDA TEP-160, available from Nakan Kogyo technologies, Inc. of Hunan province.

The applicant finds that the particle size and the foaming temperature of the foaming microspheres have a crucial influence on the comprehensive performance of the prepared pipe in the process of completing the invention, and can directly influence the heat insulation performance of the pipe while obviously influencing the mechanical property of the pipe. When the particle size of the microsphere foaming agent is too large, the mixing and dispersion between the microsphere foaming agent and a thermoplastic material are obviously influenced, the foamed pipe has large and uneven pores, a large number of uneven gaps are formed inside the pipe, the mechanical strength of the pipe is reduced, and the heat insulation performance is also obviously reduced. Probably because the particle size is too large, the specific surface area is small, the mixture with polymer chain segments of EVA materials and LDPE materials can not reach the contact of the microscopic level, and only can contact with the aggregation state formed after a plurality of molecular chain segments are aggregated, so that the mixing between the foaming agent and the thermoplastic material is influenced, and the foaming of the pipe in the state can easily cause the formation of larger pores around the microsphere foaming agent, even the connection and combination of the gaps formed around the adjacent microsphere foaming agent form larger and uneven cells, so that a stress concentration point is formed, and the mechanical property of the pipe is directly influenced. When the particle size of the microsphere foaming agent is too small, on one hand, the specific surface area of the microsphere foaming agent is too large, the dispersion between the microsphere foaming agent and a thermoplastic material is influenced, on the other hand, fine cell gaps are easily formed in the foaming process, the wall thickness of the pipe is not obviously increased, and heat can be transferred along the wall of the microsphere pipe, so that the heat insulation performance and the heat insulation performance are reduced. In addition, the raw materials are fully mixed as much as possible and then fully foamed in the preparation process of the pipe, so that the material with more uniform and stable foaming can be prepared. The applicant finds that when the LDPE material, the EVA material and other materials are used as thermoplastic materials in the application, the microsphere foaming agent with the particle size of 5-30 microns and the foaming temperature of 130-200 ℃ is adopted, the foaming uniformity and stability of the pipe are optimal, and the obtained pipe is filled with tiny and uniform bubbles and has a good heat insulation function.

< Silicone oil >

Silicone oils, known by the english name Silicone oi, generally refer to linear Silicone products which remain in a liquid state at room temperature.

In a preferred embodiment, the silicone oil is selected from one or more of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil, hydrogen-containing silicone oil and modified silicone oil.

In a preferred embodiment, the silicone oil is a mixture of a modified silicone oil and a methyl silicone oil.

(methyl Silicone oil)

Methyl silicone oil, namely dimethyl silicone oil, also known as polydimethylsiloxane, has a CAS number of 9006-65-9, and is a colorless, odorless, transparent viscous liquid.

In a preferred embodiment, the methyl silicone oil has a viscosity of 340 to 360cst at 25 ℃.

In a preferred embodiment, the methyl silicone oil has a viscosity of 350cst at 25 ℃.

The methyl silicone oil is purchased from Macro silicon chemical Co., Ltd, Fushan city, model number 201, and viscosity at 25 ℃ is 350 cst.

The cst of the invention is a general viscosity unit, namely mm²The ratio of the dynamic viscosity μ of a fluid to the density ρ of the fluid at the same temperature is a measure of the resistance to flow under gravity.

(modified Silicone oil)

The modified silicone oil is one kind of silicone oil with some organic groups to replace partial methyl groups in methyl silicone oil for improving certain performance and adapting different uses.

In a preferred embodiment, the modified silicone oil is selected from one or more of alkoxysilane-modified silicone oil, carbinol-modified silicone oil, carboxyl-modified silicone oil, polyether-modified silicone oil, and fluoroalkyl-modified silicone oil.

In a more preferred embodiment, the modified silicone oil is an alkoxysilane-modified silicone oil.

In a preferred embodiment, the preparation method of the modified silicone oil comprises the following steps:

step a: dispersing 0.05-0.1 part of dispersing agent, 25-35 parts of deionized water and 150-250 parts of solvent for 10-20 min at a stirring speed of 20-30 r/min according to parts by weight to obtain a mixture A;

step b: adding 10-15 parts of alkoxy silane and 20-25 parts of silicone oil into the mixture A obtained in the step a, and dispersing for 1-3 hours at a stirring speed of 80-120 r/min to obtain a mixture B;

step c: and (c) dropwise adding a platinum catalyst into the mixture B obtained in the step (B), and fully reacting after uniformly mixing to obtain the modified silicone oil.

step a: dispersing 0.08 part of dispersing agent, 30 parts of deionized water and 196 parts of solvent for 15min at a stirring speed of 25r/min according to parts by weight to obtain a mixture A;

step b: adding 12.5 parts of alkoxy silane and 22.5 parts of silicone oil into the mixture A obtained in the step a, and dispersing for 2 hours at a stirring speed of 100r/min to obtain a mixture B;

The solvent is not particularly limited, and any solvent known to those skilled in the art, such as acetone, may be used.

Dispersing agent

The dispersant is a reagent which can uniformly disperse solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in a liquid, and can prevent the particles from settling and coagulating to form a stable suspension.

In a preferred embodiment, the dispersant is selected from one or more combinations of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium lignosulfonate, vinyl distearamide, stearic acid monoglyceride, glyceryl tristearate, methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose.

In a preferred embodiment, the dispersant is sodium dodecyl sulfate.

The sodium dodecyl sulfate, CAS number 2386-53-0, was purchased from Guangdong Wengjiang chemical reagents, Inc.

Alkoxy silane

The alkoxysilane refers to a compound in which hydrogen atoms in Si — H bonds in silane are substituted with alkoxy groups.

In a preferred embodiment, the alkoxysilane is selected from one or more combinations of trifluoropropylmethylcyclotrisiloxane, monoalkoxysilane, dialkoxysilane, trialkoxysilane, tetraalkoxysilane, dialkyldialkoxysilane, diphenyldialkoxysilane, phenylmethyldialkoxysilane.

In a more preferred embodiment, the alkoxysilane is trifluoropropylmethylcyclotrisiloxane.

The trifluoropropylmethylcyclotrisiloxane is purchased from Zhejiang Cyclo New fluorine materials, Inc., and has the model number of D3F.

In a preferred embodiment, the silicone oil is a hydrogen silicone oil.

The hydrogenated silicone oil, namely polymethylhydrosiloxane, has a CAS number of 63148-57-2 and is purchased from Jie minister chemical Co., Ltd.

In a preferred embodiment, the weight ratio of the modified silicone oil to the methyl silicone oil is 1: (1-2).

In a more preferred embodiment, the weight ratio of the modified silicone oil to the methyl silicone oil is 1: 1.5.

platinum catalyst

The platinum catalyst is a general name of a catalyst prepared by taking metal platinum as a main active component.

The platinum catalyst used in the present invention is not particularly limited, and may be any of various platinum catalysts known to those skilled in the art, such as Karster catalyst, available from Shenzhen Xin Yongsheng New Material Co., Ltd., model number KS 30.

The applicant finds that condensed water is easily formed in the tube due to the temperature difference between the inside and the outside of the tube in the process of completing the invention, so that the moisture in the gas transmitted in the breathing tube is reduced, and micro water drops can not be conveyed to a patient along with the gas. In order to reduce the acting force between the moisture in the gas in the pipeline and the inner wall of the pipeline and avoid the moisture from contacting the wall of the pipeline and condensing, the applicant wants to introduce a fluorine-containing hydrophobic material into the pipeline, but finds that if the material is selected improperly, the wall of the pipeline is easy to leak oil, so that the safety problem is caused, and the water repellent effect is not long. The applicant finds that when the modified silicone oil obtained by modifying trifluoropropanetrimethoxysilane is compounded with silicone oil with specific viscosity for use, the prepared pipe has good hydrophobicity and safety, and can well avoid the condensation of water in the air on the inner wall of the pipe. The applicant conjectures that when the fluorine content in the modified silicone oil molecular chain is high or the fluorine-containing chain segment is long, the cohesive energy is too small to form strong interaction force with materials such as EVA material and LDPE material so far, so that stable cohesive force and entanglement points cannot be formed, the whole molecular chain migrates to the surface of the inner wall of the pipe to show oil seepage and other phenomena, and the modified silicone oil is easy to separate from the inner wall of the pipe to lose the long-acting hydrophobic effect along with the transportation of gas in the pipe, and safety problems may be caused. If the fluorine content is low or the fluorine-containing chain segment is short, a strong acting force is generated between the silicone oil molecules and other components, and the silicone oil molecules cannot easily migrate to the inner wall of the pipe from the interior of the material, so that a good water-avoiding effect is generated. In addition, the applicant finds that when the viscosity of the adopted methyl silicone oil is in the range of 340-360 cst at 25 ℃, the methyl silicone oil can be a bridge between the modified silicone oil and materials such as EVA material and LDPE material, so that the acting force between the modified silicone oil and the EVA material and the LDPE material is improved, and the water-avoiding effect is further improved on the premise that the mechanical property of the pipe is not influenced.

In a preferred embodiment, the method for preparing the tube material for effectively reducing the condensation water of the breathing circuit comprises the following steps:

the method comprises the following steps: adding the thermoplastic material and the silicone oil into a stirrer according to the parts by weight, and uniformly mixing at a stirring speed of 850r/min at 135 ℃ to obtain a mixed material;

step two: and (3) adding a microsphere foaming agent into the mixed material obtained in the step one, and mixing for 1.5 hours at 165 ℃ to obtain the pipe material capable of effectively reducing the condensed water of the breathing pipeline.

In another preferred embodiment, the method for preparing the tube material for effectively reducing the condensation water in the breathing circuit comprises the following steps:

step two: and (3) adding a microsphere foaming agent into the mixed material obtained in the step one, and mixing for 1.5h at 165 ℃ and 7.5MPa to obtain the pipe material capable of effectively reducing the condensed water of the breathing pipeline.

The present invention will now be described in detail by way of examples, and the starting materials used are commercially available unless otherwise specified.

Examples

Example 1

The embodiment 1 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 95 parts of thermoplastic material, 1.5 parts of microsphere foaming agent and 3.5 parts of silicone oil.

The thermoplastic material is a mixture of LDPE material and EVA material, and the weight ratio of the LDPE material to the EVA material is 1: 0.31; the melt index of the LDPE material at 230 ℃ and 2.16kg is 5.0g/10min, and the brand is F410-7; the melt index of the EVA material at 200 ℃ and 5kg is 1.5g/10min, the VAC content is 16 wt%, and the mark is 630. The particle size of the microsphere foaming agent is 17.5 mu m, the foaming temperature is 165 ℃, and the mark is FARIDA TEP-158. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 1.5; the methyl silicone oil has a viscosity of 350cst at 25 ℃, and is purchased from Macro silicon chemical Co., Ltd, of Foshan city, and the model number is 201; the modified silicone oil is alkoxy silane modified silicone oil, and the preparation method comprises the following steps:

Wherein the solvent is acetone; the dispersant is sodium dodecyl sulfate, and is purchased from Guangdong Wengjiang chemical reagent GmbH; the alkoxy silane is trifluoropropylmethyl cyclotrisiloxane which is purchased from Zhejiang cyclo New fluorine materials GmbH and has the model number of D3F; the silicone oil is hydrogenated silicone oil and is purchased from Jie minister chemical Co., Ltd, Dongguan city; the platinum catalyst is a Kastert catalyst, purchased from Shenzhen Xin Yongsheng New Material Co., Ltd, and has the model number of KS 30.

The preparation method of the pipe material for effectively reducing the condensed water of the breathing pipeline comprises the following steps:

Example 2

The embodiment 2 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 93 parts of thermoplastic material, 1 part of microsphere foaming agent and 2 parts of silicone oil.

The thermoplastic material is a mixture of LDPE material and EVA material, and the weight ratio of the LDPE material to the EVA material is 1: 0.1; the melt index of the LDPE material at 230 ℃ and 2.16kg is 5.0g/10min, and the brand is F410-7; the melt index of the EVA material at 200 ℃ and 5kg is 1.5g/10min, the VAC content is 16 wt%, and the mark is 630. The particle size of the microsphere foaming agent is 17.5 mu m, the foaming temperature is 130 ℃, and the mark is FARIDA TEP-158. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 1; the methyl silicone oil has a viscosity of 340cst at 25 ℃ and is purchased from Macro silicon chemical Co., Ltd, of Foshan city; the modified silicone oil is alkoxysilane-modified silicone oil, and the preparation method is the same as in example 1.

step two: and (3) adding a microsphere foaming agent into the mixed material obtained in the step one, and mixing for 1.5 hours at 130 ℃ to obtain the pipe material capable of effectively reducing the condensed water of the breathing pipeline.

Example 3

The embodiment 3 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 97 parts of thermoplastic material, 2 parts of microsphere foaming agent and 5 parts of silicone oil.

The thermoplastic material is a mixture of LDPE material and EVA material, and the weight ratio of the LDPE material to the EVA material is 1: 0.5; the melt index of the LDPE material at 230 ℃ and 2.16kg is 5.0g/10min, and the brand is F410-7; the melt index of the EVA material at 200 ℃ and 5kg is 1.5g/10min, the VAC content is 16 wt%, and the mark is F410-7630. The particle size of the microsphere foaming agent is 17.5 mu m, the foaming temperature is 200 ℃, and the mark is F410-7FARIDA TEP-158. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 2; the methyl silicone oil has a viscosity of 360cst at 25 ℃ and is purchased from Macro silicon chemical Co., Ltd, of Foshan city; the modified silicone oil is alkoxysilane-modified silicone oil, and the preparation method is the same as in example 1.

step two: and (3) adding a microsphere foaming agent into the mixed material obtained in the step one, and mixing for 1.5 hours at 200 ℃ to obtain the pipe material capable of effectively reducing the condensed water of the breathing pipeline.

Example 4

The embodiment 4 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 85 parts of thermoplastic material, 0.5 part of microsphere foaming agent and 1 part of silicone oil.

The thermoplastic material is a mixture of LDPE material and EVA material, and the weight ratio of the LDPE material to the EVA material is 1: 0.31; the melt index of the LDPE material at 230 ℃ and 2.16kg is 5.0g/10min, and the brand is F410-7; the melt index of the EVA material at 200 ℃ and 5kg is 1.5g/10min, the VAC content is 16 wt%, and the mark is 630. The particle size of the microsphere foaming agent is 17.5 mu m, the foaming temperature is 165 ℃, and the mark is FARIDA TEP-158. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 1.5; the methyl silicone oil has a viscosity of 350cst at 25 ℃, and is purchased from Macro silicon chemical Co., Ltd, of Foshan city, and the model number is 201; the modified silicone oil is alkoxysilane-modified silicone oil, and the preparation method is the same as in example 1.

The preparation method of the pipe material for effectively reducing the condensed water of the breathing pipeline is the same as that of the embodiment 1.

Example 5

The embodiment 5 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 85 parts of thermoplastic material, 0.5 part of microsphere foaming agent and 1 part of silicone oil.

Example 6

Embodiment 6 of the invention provides a pipe material for effectively reducing condensed water in a breathing pipeline, which is similar to embodiment 1 in specific implementation, and is different in that the melt index of an LDPE material at 230 ℃ and 2.16kg is replaced by 2.0g/10min from 5.0g/10min, the LDPE material is purchased from Singapore polyolefin private Limited company with the model of MBN7012, and the melt index is 2.0g/10 min.

Example 7

Embodiment 7 of the invention provides a pipe material for effectively reducing condensed water in a breathing pipeline, which is similar to embodiment 1, except that the melt index of the LDPE material at 230 ℃ and 2.16kg is replaced by 8.0g/10min from 5.0g/10min, the LDPE material is purchased from Singapore polyolefin private Limited company with the model of MBW1702 and the melt index of 8.0g/10 min.

Example 8

Example 8 of the present invention provides a tubing for effectively reducing condensation in a breathing circuit, the embodiment being similar to example 1, except that the melt index of the EVA material at 200 ℃ and 5kg is changed from 1.5g/10min to 0.8g/10min, which is purchased from tokyo textile co, japan, model 627, the melt index is 0.8g/10min, and the VAC content is 20%.

Example 9

Example 9 of the present invention provides a tubing for effectively reducing breathing circuit condensation, the specific embodiment of which is similar to example 1, except that the melt index of the EVA material at 200 ℃ and 5kg is replaced by 14g/10min from 1.5g/10min, which is purchased from tokyo textile corporation of japan, model 625, the melt index is 14g/10min, and the VAC content is 15%.

Example 10

Example 10 of the present invention provides a tubing for effectively reducing breathing circuit condensation, the specific embodiment of which is similar to example 1, except that the EVA material has a VAC content of 6% instead of 16%, and is purchased from toyoyo textile co, japan, model number 510F, melt index 2.5g/10min, and VAC content of 6%.

Example 11

Example 11 of the present invention provides a tubing for effectively reducing breathing circuit condensation, the embodiment being similar to example 1, except that the EVA material has a VAC content of 26% instead of 16%, and is purchased from toyoyo textile co, model 634, a melt index of 4g/10min, and a VAC content of 26%.

Example 12

Example 12 of the present invention provides a tubing for effectively reducing breathing circuit condensation, which is implemented in a similar manner as example 1, except that the microsphere foaming agent has a particle size of 40 μm instead of 17.5 μm, which is purchased from volkong technologies, inc.

Example 13

Embodiment 13 of the present invention provides a tube material for effectively reducing condensed water in a breathing circuit, and the specific implementation manner of the tube material is similar to that of embodiment 1, except that the foaming temperature of the microsphere foaming agent is changed from 165 ℃ to 120 ℃.

Example 14

Embodiment 14 of the present invention provides a tube material for effectively reducing condensation water in a breathing circuit, and a specific implementation manner of the tube material is similar to that in embodiment 1, except that a foaming temperature of the microsphere foaming agent is changed from 165 ℃ to 210 ℃.

Example 15

Embodiment 15 of the present invention provides a tubing for effectively reducing breathing circuit condensed water, which is implemented in a similar manner to embodiment 1, except that the weight ratio of the modified silicone oil to the methyl silicone oil in the silicone oil is changed from 1: 1.5 replacement by 1: 0.8.

example 16

Embodiment 16 of the present invention provides a tubing for effectively reducing breathing circuit condensed water, which is implemented in a similar manner to embodiment 1, except that the weight ratio of the modified silicone oil to the methyl silicone oil in the silicone oil is changed from 1: 1.5 replacement by 1: 2.2.

example 17

Embodiment 17 of the present invention provides a tubing for effectively reducing condensation water in a respiratory tract, which is implemented in a similar manner as in embodiment 1, except that the viscosity of methyl silicone oil in the silicone oil at 25 ℃ is replaced by 330cst from 350 cst.

Example 18

Embodiment 18 of the present invention provides a tubing for effectively reducing condensation water in a respiratory tract, which is implemented in a similar manner as in embodiment 1, except that the viscosity of methyl silicone oil in the silicone oil at 25 ℃ is replaced by 370cst from 350 cst.

Example 19

Example 19 of the present invention provides a tube material for effectively reducing condensation water in a respiratory tract, which is implemented in a similar manner to example 1, except that trifluoropropylmethylcyclotrisiloxane used in the preparation method of the modified silicone oil is replaced with dodecafluoroheptylpropyltrimethoxysilane having a CAS number of 1105578-57-1, which was purchased from Guangdong, Wengjiang chemical Co., Ltd.

Example 20

The embodiment 20 of the invention provides a pipe material for effectively reducing condensed water of a breathing pipeline, which comprises the following raw materials in parts by weight: 95 parts of thermoplastic material, 1.5 parts of microsphere foaming agent and 3.5 parts of silicone oil.

Example 21

Embodiment 21 of the present invention provides a tube material for effectively reducing condensed water in a breathing pipeline, comprising the following raw materials by weight: 95 parts of thermoplastic material, 1.5 parts of microsphere foaming agent and 3.5 parts of silicone oil.

The thermoplastic material is a PP material and is K8003 of Taiwan chemical fiber GmbH. The particle size of the microsphere foaming agent is 17.5 mu m, the foaming temperature is 165 ℃, and the mark is FARIDA TEP-158. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 1.5; the methyl silicone oil has a viscosity of 350cst at 25 ℃, and is purchased from Macro silicon chemical Co., Ltd, of Foshan city, and the model number is 201; the modified silicone oil is alkoxysilane-modified silicone oil, and the preparation method is the same as in example 1.

Example 22

Embodiment 22 of the present invention provides a tube material for effectively reducing breathing circuit condensed water, which comprises the following raw materials by weight: 95 parts of thermoplastic material, 1.5 parts of microsphere foaming agent and 3.5 parts of silicone oil.

The thermoplastic material is a mixture of LDPE material and LLDPE material, and the weight ratio of the LDPE material to the LLDPE material is 1: 1. the LDPE material is F410-7 in trademark. The LLDPE material is 7144 petrochemical in Guangzhou. The silicone oil is a mixture of modified silicone oil and methyl silicone oil, and the weight ratio of the silicone oil to the methyl silicone oil is 1: 1.5; the methyl silicone oil has a viscosity of 350cst at 25 ℃, and is purchased from Macro silicon chemical Co., Ltd, of Foshan city, and the model number is 201; the modified silicone oil is alkoxysilane-modified silicone oil, and the preparation method is the same as in example 1.

Evaluation of Performance

1. Heat insulation performance: the tubes obtained in examples 1 to 5, 12 to 14, and 20 to 22, which effectively reduce the condensation water in the respiratory tract, were prepared into samples with a length of 30cm, a width of 30cm, and a thickness of 2mm by methods known to those skilled in the art, and the samples were wrapped in a 60 ℃ non-heat-insulating hot water bag by the same wrapping method. Randomly selecting 10 volunteers, touching the hot water bag coated by the sample with the back of the hand respectively, recording the average score without obvious scald feeling for 2 scores, slightly scalding for 1 score and 0 score compared with the scald score, and showing the result in table 1.

TABLE 1 Heat insulation Performance test results

	Heat insulation performance
		Example 1	2.0
Example 2	1.8
		Example 3	1.9
Example 4	1.4
		Example 5	1.3
Example 12	0.8
		Example 13	1.2
Example 14	1.3
		Example 20	2.0
Example 21	1.8
		Example 22	1.8

2. Water contact angle: the tube material for effectively reducing the breathing pipeline condensed water obtained in the embodiments 1 to 5 and 15 to 22 is used for preparing a sample with the length of 50mm, the width of 50mm and the thickness of 6mm, the sample is horizontally placed on a test bed, 2.000 mu L of distilled water is vertically dripped on the surface of the sample from the upper part of the sample by using a micro sample injector, after the dripping and standing for 1min, the horizontal direction of the sample is photographed, the height and the width of the liquid drop are measured, and the water contact angle is obtained after calculation. Three samples were taken for each group, three points were randomly measured for each sample, and the data were measured and averaged, the results are shown in table 2.

TABLE 2 Water contact Angle test results

	Water contact angle/° c
		Example 1	145
Example 2	144
		Example 3	145
Example 4	123
		Example 5	125
Example 15	128
		Example 16	141
Example 17	124
		Example 18	145
Example 19	94
		Example 20	145
Example 21	143
		Example 22	143

3. And (3) testing mechanical properties: the tube material for effectively reducing the condensed water of the breathing pipeline obtained in the embodiment 1-22 is measured according to GB/T1040.1-2018' Plastic tensile property part 1: general rules, dumbbell-shaped, 2mm thick and 4mm wide, tensile strength and elongation at break were measured at 25 ℃ using a tensile strength tester. After three tests, the average value was calculated, and the results are shown in Table 3.

TABLE 3 mechanical Property test results

The combination of the above experimental results shows that: the invention mainly uses thermoplastic material, microsphere foaming agent and silicone oil to prepare the pipe material capable of effectively reducing the condensed water of the breathing pipeline. Experimental test results show that the pipe material for effectively reducing the condensed water of the breathing pipeline, which is prepared by the invention, shows good heat insulation performance through heat insulation performance tests; the water contact angle test shows that the water contact angle can reach 145 degrees, the water-repellent paint has excellent hydrophobic property, the adhesive force between micro water drops and the pipe wall can be reduced, and the micro water drops can be more easily conveyed to a patient along with gas, so that the formation of condensed water is reduced while the sealing property of the pipe is ensured; the mechanical property test shows that the tensile strength can reach 21MPa, the elongation at break can reach 836%, and the mechanical property is excellent. In addition, the materials used in the invention are all safe and environment-friendly materials, physical foaming is adopted, the foaming can be carried out under normal pressure and pressurization, the foaming process is simple and convenient, and the large-scale industrial production is facilitated.

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. The invention is not limited to the embodiments described above, but rather, many modifications and variations may be made by one skilled in the art without departing from the scope of the invention.

Claims

1. The pipe for effectively reducing the condensate water of the breathing pipeline is characterized by comprising the following raw materials in parts by weight: 85-105 parts of thermoplastic material, 0.5-5 parts of microsphere foaming agent and 1-8 parts of silicone oil.

2. The effective breathing circuit condensate reduction tubing of claim 1, wherein the thermoplastic material is selected from one or more of PP, LDPE, LLDPE, EVA, PE, and PVC.

3. The pipe material for effectively reducing the condensate water in the respiratory tract, as claimed in claim 2, wherein the LDPE material has a melt index of 3.0-7.0 g/10min at 230 ℃ and 2.16 kg.

4. The pipe material for effectively reducing the condensate water of the breathing pipeline according to claim 2, wherein the melt index of the EVA material at 200 ℃ and 5kg is 1.0-4.0 g/10 min.

5. The pipe material for effectively reducing the condensation water of the breathing pipeline as recited in claim 2 or 4, wherein the EVA material is EVA material with VAC content of 15-20 wt%.

6. The tube material for effectively reducing the condensate water in the respiratory tract, according to claim 1, is characterized in that the particle size of the microsphere foaming agent is 5-30 μm.

7. The tube material for effectively reducing the condensation water in the respiratory tract, according to claim 1, wherein the silicone oil is selected from one or more of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxy silicone oil, ethyl hydrogen-containing silicone oil, hydroxy hydrogen-containing silicone oil, hydrogen-containing silicone oil and modified silicone oil.

8. The tube material for effectively reducing the condensation water of the breathing pipeline according to claim 7, wherein the methyl silicone oil has a viscosity of 340-360 cst at 25 ℃.

9. The tubing for effectively reducing breathing tube condensed water according to claim 8, wherein the weight ratio of the modified silicone oil to the methyl silicone oil is 1: (1-2).

10. A method for preparing a tube for effectively reducing breathing circuit condensation according to any one of claims 1-9, comprising the steps of: