CN112646257A - High-density polyethylene sheath material and preparation process thereof - Google Patents
High-density polyethylene sheath material and preparation process thereof Download PDFInfo
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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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
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
The invention discloses a high-density polyethylene sheath material and a preparation process thereof, belonging to the technical field of polyethylene sheath materials, and the technical scheme is characterized in that the high-density polyethylene sheath material comprises a component A and a component B, wherein the component A comprises the following components: 80-90 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 5-8 parts of carbon black, 1-5 parts of polyethylene wax, 1-3 parts of antioxidant and 1-3 parts of wear-resisting agent; and (B) component: 2-7 parts of melamine, 5-15 parts of formaldehyde solution, 8-12 parts of ammonium polyphosphate and 4-6 parts of pentaerythritol, and the flame-retardant system is added into the sheath material of the high-density polyethylene, so that the phenomena of dripping and object-dropping reburning of a sample in the combustion process can be effectively reduced, and the processing flowability, the impact strength, the tensile strength, the elongation at break, the carbon forming effect during combustion and the like of the high-density polyethylene sheath material added with the flame-retardant system can be improved.
Description
Technical Field
The invention relates to the technical field of polyethylene sheath materials, in particular to a high-density polyethylene sheath material and a preparation process thereof.
Background
In recent years, with the rapid development of the communication industry in China, the demand of optical cables is gradually increased, wherein the annual output of the communication optical cables is more than 7 x 10^6 km. However, the communication optical cable is always in a humid environment, and the aluminum tape used as the protective layer is easily copied by oxidation to cause the distortion of the optical fiber signal.
The high-density polyethylene has good heat resistance and cold resistance, good chemical stability, higher rigidity and toughness, good mechanical strength, good barrier property, dielectric property and environmental stress cracking resistance, and can be widely applied to the fields of blow molding products, film and plate products, injection molding products, pipe products, fibers, wires, cables and the like. The third most common plastic used in the world is polyvinyl chloride and polypropylene, which are synthetic polymer materials of international civilization.
The cable is often used in some harsh environments, so the requirements on various properties of high-density polyethylene are high, meanwhile, the oxygen index of polyethylene is low, the cable belongs to a flammable material, the application of PE to wider fields is greatly limited, and therefore, the performance of the cable needs to be improved by modifying a polyethylene sheath material.
Disclosure of Invention
The invention aims to provide a high-density polyethylene sheath material and a preparation process thereof, wherein a flame-retardant system is added into the high-density polyethylene sheath material, so that the phenomena of dripping and drop-object reburning sintering of a sample in the combustion process can be effectively reduced, and the processing flowability, the impact strength, the tensile strength, the elongation at break, the carbon forming effect in the combustion and the like of the high-density polyethylene sheath material added with the flame-retardant system can be improved.
The technical purpose of the invention is realized by the following technical scheme:
the high-density polyethylene sheath material comprises a component A and a component B, wherein the component A and the component B comprise the following raw materials in parts by mass:
and (2) component A: 80-90 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 5-8 parts of carbon black, 1-5 parts of polyethylene wax, 1-3 parts of antioxidant and 1-3 parts of wear-resisting agent;
and (B) component: 2-7 parts of melamine, 5-15 parts of formaldehyde solution, 8-12 parts of ammonium polyphosphate and 4-6 parts of pentaerythritol.
Further, the carbon black is one or more of N330, N350, N539, N550, N660, N762 and N774.
Further, the antioxidant is one or more of triphenyl phosphite, diphenyl isooctyl phosphite, triisooctyl phosphite, triisodecyl phosphite, trilauryl phosphite, triester phosphite, diphenyl phosphite, antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 1024, antioxidant DLTP and antioxidant DSTP.
Further, the wear-resisting agent is modified graphene.
Further, the mass percent of the formaldehyde solution is 35-40%.
The preparation process of the high-density polyethylene sheath material comprises the following steps:
s1: mixing and stirring 2-7 parts of melamine and 5-15 parts of formaldehyde solution in the component B, sequentially adjusting the pH value with NaOH solution and HCl solution, heating and stirring, and performing suction filtration, vacuum drying and grinding to obtain prepolymer powder;
s2: adding the prepolymer powder, 8-12 parts of ammonium polyphosphate and 4-6 parts of pentaerythritol into a high-speed mixer, and mixing to obtain a mixture B;
s3: adding 80-90 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 5-8 parts of carbon black, 1-5 parts of polyethylene wax, 1-3 parts of antioxidant and 1-3 parts of wear-resisting agent in the component A into a mixer for blending, and then feeding into an extruder for mixing, plasticizing and extruding;
s4: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
Further, the pH value of the NaOH solution is adjusted to 8.5-9, and the pH value of the HCl solution is adjusted to 5-5.5.
Further, the heating and stirring temperature in the S1 is 80 ℃, the stirring time is 2-3h, and the stirring speed is 400-.
Further, the mixture B is added with an ethanol solution of an aluminum-titanium coupling agent.
Furthermore, the temperature for mixing and plasticizing in the S3 is 150-160 ℃, and the time is 10-20 min.
In conclusion, the invention has the following beneficial effects:
1. the flame-retardant system is added into the high-density polyethylene, the modified ammonium polyphosphate has smaller molecular particles, can improve the compatibility of the ammonium polyphosphate and the high-density polyethylene, reduces the probability of gaps between the high-density polyethylene and small molecular groups to a certain extent, effectively avoids stress concentration, has better dispersibility than that of the untreated ammonium polyphosphate, and improves the processing flowability, the impact strength, the tensile strength, the elongation at break, the carbon forming effect during combustion and the like of the finally prepared high-density polyethylene sheath material which is added into the flame-retardant system;
2. compared with the high-density polyethylene without a flame-retardant system, the modified ammonium polyphosphate is added, the carbon layer formed after combustion is uniform in thickness and density, and high-density polyethylene aggregates do not exist, so that the phenomena of melting and dripping after combustion can be effectively prevented.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1:
the high-density polyethylene sheath material comprises a component A and a component B, wherein the component A and the component B comprise the following raw materials in parts by mass:
and (2) component A: 80 parts of high-density polyethylene, 30 parts of linear low-density polyethylene, 3 parts of carbon black N3305, 1 part of polyethylene wax, 1 part of antioxidant and 1 part of modified graphene, wherein the antioxidant is a mixture of triphenyl phosphite and antioxidant 1010.
And (B) component: 2 parts of melamine, 10 parts of 35% formaldehyde solution, 8 parts of ammonium polyphosphate and 4 parts of pentaerythritol.
The preparation process of the high-density polyethylene sheath material comprises the following steps:
s1: mixing and stirring 2 parts of melamine and 10 parts of 35% formaldehyde solution in the component B, firstly adjusting the pH value to 8.5 by using NaOH solution, then adding distilled water, adjusting the pH value to 5.5 by using HCl solution, heating at 80 ℃ in a water bath kettle, stirring for 2 hours at the stirring speed of 400r/min, and then carrying out suction filtration, vacuum drying and grinding to obtain prepolymer powder;
s2: adding 8 parts of ammonium polyphosphate and 4 parts of pentaerythritol into the prepolymer powder, adding an ethanol solution of an aluminum-titanium coupling agent with the mass concentration of 1.5%, and adding the mixture into a high-speed mixer to mix to obtain a mixture B;
s3: adding 80 parts of high-density polyethylene, 30 parts of linear low-density polyethylene, 3305 parts of carbon black N, 1 part of polyethylene wax, 1 part of antioxidant and 1 part of modified graphene in the component A into a mixer for blending, then feeding into an extruder, and carrying out mixing, plasticizing and extruding at the temperature of 150 ℃ for 10 min;
s4: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
Example 2:
the high-density polyethylene sheath material comprises a component A and a component B, wherein the component A and the component B comprise the following raw materials in parts by mass:
and (2) component A: 85 parts of high-density polyethylene, 25 parts of linear low-density polyethylene, N3506 parts of carbon black, 2 parts of polyethylene wax, 2 parts of antioxidant and 3 parts of modified graphene, wherein the antioxidant is a mixture of triisooctyl phosphite and antioxidant 1010.
And (B) component: 4 parts of melamine, 12 parts of 40% formaldehyde solution, 10 parts of ammonium polyphosphate and 5 parts of pentaerythritol.
The preparation process of the high-density polyethylene sheath material comprises the following steps:
s1: mixing and stirring 4 parts of melamine in the component B and 12 parts of 40% formaldehyde solution, firstly adjusting the pH value to 8.5 by using NaOH solution, then adding distilled water, adjusting the pH value to 5.5 by using HCl solution, heating at 80 ℃ in a water bath kettle, stirring for 2 hours at the stirring speed of 500r/min, and then carrying out suction filtration, vacuum drying and grinding to obtain prepolymer powder;
s2: 10 parts of ammonium polyphosphate and 5 parts of pentaerythritol are added into the prepolymer powder, and an ethanol solution of an aluminum-titanium coupling agent with the mass concentration of 1.5% is added into the prepolymer powder and mixed with a high-speed mixer to obtain a mixture B;
s3: adding 85 parts of high-density polyethylene, 25 parts of linear low-density polyethylene, 6 parts of carbon black N3506, 2 parts of polyethylene wax, 2 parts of antioxidant and 3 parts of modified graphene in the component A into a mixer, blending, then feeding into an extruder, and kneading, plasticizing and extruding at 155 ℃ for 10 min;
s4: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
Example 3:
the high-density polyethylene sheath material comprises a component A and a component B, wherein the component A and the component B comprise the following raw materials in parts by mass:
and (2) component A: 90 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 5398 parts of carbon black N, 3 parts of polyethylene wax, 3 parts of antioxidant and 3 parts of modified graphene, wherein the antioxidant is a mixture of trilauryl phosphite and antioxidant 1076.
And (B) component: 4 parts of melamine, 8 parts of 35% formaldehyde solution, 10 parts of ammonium polyphosphate and 5 parts of pentaerythritol.
The preparation process of the high-density polyethylene sheath material comprises the following steps:
s1: mixing and stirring 4 parts of melamine and 8 parts of 35% formaldehyde solution in the component B, firstly adjusting the pH value to 8.5 by using NaOH solution, then adding distilled water, then adjusting the pH value to 5.5 by using HCl solution, heating at 80 ℃ in a water bath kettle, stirring for 2 hours at the stirring speed of 400r/min, and then obtaining prepolymer powder through suction filtration, vacuum drying and grinding;
s2: 10 parts of ammonium polyphosphate and 5 parts of pentaerythritol are added into the prepolymer powder, and an ethanol solution of an aluminum-titanium coupling agent with the mass concentration of 1.5% is added into the prepolymer powder and mixed with a high-speed mixer to obtain a mixture B;
s3: adding 90 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 5398 parts of carbon black N, 3 parts of polyethylene wax, 3 parts of antioxidant and 3 parts of modified graphene in the component A into a mixer for blending, then feeding into an extruder, and performing mixing, plasticizing and extruding at the temperature of 150 ℃ for 10 min;
s4: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
Example 4:
the high-density polyethylene sheath material comprises a component A, wherein the component A comprises the following raw materials in parts by mass: and (2) component A: 90 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 5398 parts of carbon black N, 3 parts of polyethylene wax, 3 parts of antioxidant and 3 parts of modified graphene, wherein the antioxidant is a mixture of trilauryl phosphite and antioxidant 1076.
Step 1: adding 90 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 5398 parts of carbon black N, 3 parts of polyethylene wax, 3 parts of antioxidant and 3 parts of modified graphene in the component A into a mixer for blending, then feeding the mixture into an extruder for kneading, plasticizing and extruding, wherein the temperature for kneading and plasticizing is 150 ℃ and the time is 10 min;
step 2: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
Example 4 is a high density polyethylene sheathing material without a flame retardant system, and as a blank group, the high density polyethylene sheathing materials prepared in examples 1 to 3 were named # 1, # 2 and # 3, respectively, and then 4 high density polyethylene sheathing materials were subjected to a combustion test, respectively, with the results as follows:
TABLE 1 Combustion results
The test results in table 1 show that the addition of the flame retardant system can significantly reduce the combustion speed of the high-density polyethylene sheath material, and has a better flame retardant effect, mainly because the addition of the ammonium polyphosphate of the flame retardant system enables the high-density polyethylene sheath material to form a compact and firm expanded carbon layer through a series of complex processes such as etherification, dehydration, expansion, crosslinking and the like in a high-temperature environment, the carbon layer can effectively reduce the diffusion of heat and combustible gas, and inhibit the further degradation of the temporal base body, so that the heat release speed of the flame retardant material is greatly reduced, and the flame retardant purpose is achieved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The high-density polyethylene sheath material is characterized by comprising a component A and a component B, wherein the component A and the component B comprise the following raw materials in parts by mass:
and (2) component A: 80-90 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 5-8 parts of carbon black, 1-5 parts of polyethylene wax, 1-3 parts of antioxidant and 1-3 parts of wear-resisting agent;
and (B) component: 2-7 parts of melamine, 5-15 parts of formaldehyde solution, 8-12 parts of ammonium polyphosphate and 4-6 parts of pentaerythritol.
2. The high-density polyethylene sheath material according to claim 1, wherein: the carbon black is one or more of N330, N350, N539, N550, N660, N762 and N774.
3. The high-density polyethylene sheath material according to claim 1, wherein: the antioxidant is one or more of triphenyl phosphite, diphenyl isooctyl phosphite, triisooctyl phosphite, triisodecyl phosphite, trilauryl phosphite, triester phosphite, diphenyl phosphite, antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 1024, antioxidant DLTP and antioxidant DSTP.
4. The high-density polyethylene sheath material according to claim 1, wherein: the wear-resisting agent is modified graphene.
5. The high-density polyethylene sheath material according to claim 1, wherein: the mass percent of the formaldehyde solution is 35-40%.
6. The preparation process of the high-density polyethylene sheath material as claimed in claim 1, which comprises the following steps:
s1: mixing and stirring 2-7 parts of melamine and 5-15 parts of formaldehyde solution in the component B, sequentially adjusting the pH value with NaOH solution and HCl solution, heating and stirring, and performing suction filtration, vacuum drying and grinding to obtain prepolymer powder;
s2: adding the prepolymer powder, 8-12 parts of ammonium polyphosphate and 4-6 parts of pentaerythritol into a high-speed mixer, and mixing to obtain a mixture B;
s3: adding 80-90 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 5-8 parts of carbon black, 1-5 parts of polyethylene wax, 1-3 parts of antioxidant and 1-3 parts of wear-resisting agent in the component A into a mixer for blending, and then feeding into an extruder for mixing, plasticizing and extruding;
s4: and after extrusion, cooling, blow-drying, granulating, drying and packaging finished products.
7. The preparation process of the high-density polyethylene sheath material according to claim 6, wherein the preparation process comprises the following steps: and the pH value of the NaOH solution is adjusted to 8.5-9, and the pH value of the HCl solution is adjusted to 5-5.5.
8. The preparation process of the high-density polyethylene sheath material according to claim 6, wherein the preparation process comprises the following steps: the heating and stirring temperature in the S1 is 80 ℃, the stirring time is 2-3h, and the stirring speed is 400-600 r/min.
9. The preparation process of the high-density polyethylene sheath material according to claim 6, wherein the preparation process comprises the following steps: and adding an ethanol solution of an aluminum-titanium coupling agent into the mixture B.
10. The preparation process of the high-density polyethylene sheath material according to claim 6, wherein the preparation process comprises the following steps: the temperature for mixing and plasticizing in the S3 is 150-160 ℃, and the time is 10-20 min.
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| CN109233061A (en) * | 2018-09-20 | 2019-01-18 | 薛向东 | A kind of fire-retardant polyethylene cable material |
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2020
- 2020-12-29 CN CN202011591620.9A patent/CN112646257A/en active Pending
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| CN101570610A (en) * | 2009-06-04 | 2009-11-04 | 上海凯波特种电缆料厂有限公司 | Fire-retardant polyethylene cable material with mould-proof function and preparation method thereof |
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