CN111704758A - Processing method of PE plastic particles for 5G optical cable sheath - Google Patents
Processing method of PE plastic particles for 5G optical cable sheath Download PDFInfo
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- CN111704758A CN111704758A CN202010509594.4A CN202010509594A CN111704758A CN 111704758 A CN111704758 A CN 111704758A CN 202010509594 A CN202010509594 A CN 202010509594A CN 111704758 A CN111704758 A CN 111704758A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
- B29B7/286—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring properties of the mixture, e.g. temperature, density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
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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
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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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- 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
- C08L2207/066—LDPE (radical process)
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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
- C08L2312/00—Crosslinking
Abstract
The invention belongs to the technical field of high polymer materials, and particularly relates to a processing method of PE plastic particles for a 5G optical cable sheath, which comprises the following steps: (1) weighing HDPE, LDPE, EVA and inorganic filler, adding into an internal mixer, heating to 125 ℃, and then starting a temperature control system; (2) controlling the temperature at 140-; (3) granulating the mixture to obtain PE plastic particles; according to the invention, the EVA resin is crosslinked near the HDPE melting point temperature by controlling the banburying temperature of the mixture, so that a micro-crosslinking state is formed under the lower high-molecular chain segment motion activity, and the crosslinking structure in the micro-crosslinking state is further introduced into the HDPE and LDPE composite matrix material, so that the heat resistance of the material is improved on the premise of not influencing the processing performance of the material.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a processing method of PE plastic particles for a 5G optical cable sheath.
Background
The 5G, fifth generation mobile communication technology, is the latest generation of cellular mobile communication technology, and its performance goals are high data rate, reduced latency, energy saving, reduced cost, increased system capacity and large-scale device connection. The main advantages of the 5G network are that the data transmission rate is far higher than that of the previous cellular network, and can reach 10Gbit/s at most, which is faster than that of the current wired internet and 100 times faster than that of the previous 4G LTE cellular network; another advantage is lower network delay (faster response time), below 1 millisecond, and 30-70 milliseconds for 4G.
The optical cable sheath is an important factor for ensuring stable transmission of 5G signals, and at present, the higher requirements of the 5G technology on the optical cable sheath material are mainly reflected in heat resistance and high and low temperature shrinkage, namely the heating deformation of the sheath material in the use period is less than or equal to 0.7 percent relative to the heating deformation of a transmission medium; the main resin material of the common optical cable sheath material is polyethylene resin (PE), which has the advantages of light weight, high bending strength, small friction coefficient, good sealing performance, corrosion resistance and the like, but the melting point of the PE resin is generally 92 ℃, so that the thermal deformation temperature of the optical cable sheath is lower, and the requirements of the 5G technology on the optical cable sheath cannot be met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a processing method of PE plastic particles for a 5G optical cable sheath.
In order to achieve the purpose, the invention adopts the following technical scheme:
a processing method of PE plastic particles for a 5G optical cable sheath comprises the following steps:
(1) weighing HDPE, LDPE, EVA and inorganic filler, adding into an internal mixer, stirring and mixing, heating to 125 ℃, and then starting a temperature control system of the internal mixer;
(2) controlling the temperature of an internal mixer at 140-145 ℃, adding a crosslinking agent DCP, an ultraviolet absorbent, a light stabilizer, an antioxidant and a lubricant into the internal mixer for internal mixing, controlling the temperature of the internal mixer to be reduced to 135 ℃ by using a temperature control system after the addition is finished, keeping the temperature after the temperature is reached, and carrying out internal mixing for 3-5min to obtain a mixture;
(3) and (3) conveying the mixture prepared in the step (2) to a double-screw extruder through double-cone shearing for melting and mixing, and pressurizing, bracing, cooling and granulating through a melt pump to obtain the PE plastic particles for the 5G optical cable sheath.
Preferably, in step (1), the weight ratio of HDPE to LDPE is 1: (0.3-0.8).
Preferably, in the EVA, the mass content of VA is 5-20%.
Preferably, the inorganic filler is selected from one or more of alumina, zinc oxide, silica, aluminum nitride, boron nitride and silicon carbide.
Preferably, the particle size of the inorganic filler is 1 to 10 μm.
Preferably, the ultraviolet absorbent is 2-hydroxy-4-n-octoxybenzophenone;
the light stabilizer is a hindered amine light stabilizer;
the antioxidant is one of hindered phenol antioxidant and amine antioxidant or the combination of hindered phenol antioxidant and amine antioxidant;
the lubricant is one of stearic acid, stearate, polyethylene wax, ethylene bis-stearamide, pentaerythritol bis-stearate or a combination thereof.
Preferably, the working temperature of the double-screw extruder is 155-175 ℃, and the screw rotating speed is 70-90 rpm.
Preferably, the PE plastic particles for the 5G optical cable sheath are prepared from the following raw material components in parts by weight: 50-60 parts of HDPE, 15-48 parts of LDPE, 20-30 parts of EVA, 1-8 parts of inorganic filler, 10-15 parts of cross-linking agent DCP, 0.1-1 part of ultraviolet absorbent, 0.1-0.5 part of light stabilizer, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant.
Compared with the prior art, the invention has the following technical effects:
according to the processing method of the PE plastic particles, provided by the invention, the EVA resin is crosslinked near the HDPE melting point temperature by controlling the banburying temperature of the mixture, so that a micro-crosslinking state is formed under the lower high-molecular chain segment motion activity, and the crosslinking structure in the micro-crosslinking state is further introduced into the composite matrix material of the HDPE and the LDPE, so that the heat resistance of the material is improved on the premise of not influencing the processing performance of the material; in addition, as the EVA resin and the PE resin have good compatibility, the comprehensive performance of the finally obtained PE plastic particle product for the optical cable sheath is improved due to the introduction of the micro-crosslinking structure.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified with the specific embodiments.
All the starting materials in the present invention, the sources of which are not particularly limited, may be either commercially available or prepared according to conventional methods well known to those skilled in the art. All the raw materials used in the present invention are not particularly limited in purity, and the present invention preferably employs a purity which is conventional in the field of analytical purification or composite materials.
The invention provides a processing method of PE plastic particles for a 5G optical cable sheath, which comprises the following steps:
(1) weighing HDPE, LDPE, EVA and inorganic filler, adding into an internal mixer, stirring and mixing, heating to 125 ℃, and then starting a temperature control system of the internal mixer;
(2) controlling the temperature of an internal mixer at 140-145 ℃, adding a crosslinking agent DCP, an ultraviolet absorbent, a light stabilizer, an antioxidant and a lubricant into the internal mixer for internal mixing, controlling the temperature of the internal mixer to be reduced to 135 ℃ by using a temperature control system after the addition is finished, keeping the temperature after the temperature is reached, and carrying out internal mixing for 3-5min to obtain a mixture;
(3) and (3) conveying the mixture prepared in the step (2) to a double-screw extruder through double-cone shearing for melting and mixing, and pressurizing, bracing, cooling and granulating through a melt pump to obtain the PE plastic particles for the 5G optical cable sheath.
In the invention, the HDPE and the LDPE have better compatibility, wherein the tensile strength and hardness of the HDPE are obviously higher than those of the LDPE because the main chain of the HDPE has few and short branched chains and high crystallinity; the low-temperature resistance of the LDPE is good, and the impact strength of the LDPE is high; the two are blended and modified to obtain a blended resin system with comprehensive performance; the EVA resin is introduced into the blended resin system and is matched with a special banburying process, namely, the temperature control system of a banbury mixer controls the banburying temperature to be reduced to the vicinity of a softening point after the charging is finished, and the movement activity of a high molecular chain segment is reduced, so that the EVA resin forms a micro-crosslinking state.
Further, according to the method of the present invention, the content of HDPE is increased to improve the puncture resistance of the optical cable sheath made of the PE plastic particles, and the content of LDPE is increased to improve the impact strength of the final product, preferably, the weight ratio of HDPE to LDPE is 1: (0.3-0.8), more preferably, the weight ratio of HDPE to LDPE is 1: 0.6.
according to the method of the present invention, the EVA resin has good flexibility and rubber-like elasticity, and can still have good flexibility below 0 ℃, and the performance of the EVA resin mainly depends on the content of vinyl acetate on the molecular chain, specifically, as known to those skilled in the art, when MI is constant, the content of Vinyl Acetate (VA) is increased, and the elasticity, flexibility, etc. of the EVA resin are also increased; when the content of Vinyl Acetate (VA) is decreased, the rigidity of the EVA resin is increased, and the abrasion resistance and electrical insulation properties are also improved. In the present invention, preferably, the EVA has a VA content of 5 to 20% by mass.
According to the method of the present invention, the inorganic filler mainly plays a role of filling and reinforcing, and the inorganic filler can adopt inorganic fillers commonly used in the art, and preferably, the inorganic filler is one or more selected from alumina, zinc oxide, silica, aluminum nitride, boron nitride and silicon carbide. Further, according to the present invention, the particle size of the inorganic filler is 1 to 10 μm.
According to the method of the invention, the ultraviolet absorbent is 2-hydroxy-4-n-octoxybenzophenone;
the light stabilizer is a hindered amine light stabilizer, and specific examples thereof include poly (p- [6- [ (1,1,3, 3-tetramethylbutyl) -amino ]1,3, 5-triazine-2, 4-diyl ] [ (2,2,6, 6-tetramethylpiperidyl) -imino ] -1, 6-hexanediyl- (,2,6, 6-tetramethylpiperidyl) -imino ] (trade name: CH944, manufactured by basf corporation);
the antioxidant is one of hindered phenol antioxidant and amine antioxidant or the combination of hindered phenol antioxidant and amine antioxidant; further, the hindered phenol antioxidant may specifically be an antioxidant 1010, and the amine antioxidant may specifically be an antioxidant KY 405; the antioxidant is preferably selected from antioxidant 1010 and antioxidant KY405 according to the weight ratio of 1: (1-2) are compounded.
The lubricant is one of stearic acid, stearate, polyethylene wax, ethylene bis-stearamide, pentaerythritol bis-stearate or a combination thereof.
According to the method, the working temperature of the double-screw extruder is 155-175 ℃, and the screw rotating speed is 70-90 rpm.
According to the method, the content of the raw material components of the PE plastic particles for the 5G optical cable sheath can be selected in a wide range, and preferably, the PE plastic particles for the 5G optical cable sheath are prepared from the following raw material components in parts by weight: 50-60 parts of HDPE, 15-48 parts of LDPE, 20-30 parts of EVA, 1-8 parts of inorganic filler, 10-15 parts of crosslinking agent DCP, 0.1-1 part of ultraviolet absorbent, 0.1-0.5 part of light stabilizer, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant.
The following provides a further description of the processing method of PE plastic particles for 5G cable sheath provided by the present invention by using specific examples.
Example 1
A processing method of PE plastic particles for a 5G optical cable sheath comprises the following steps:
(1) weighing HDPE, LDPE, EVA and inorganic filler, adding into an internal mixer, stirring and mixing, heating to 125 ℃, and then starting a temperature control system of the internal mixer;
(2) controlling the temperature of an internal mixer to be 140 ℃, adding a crosslinking agent DCP, an ultraviolet absorbent, a light stabilizer, an antioxidant and a lubricant into the internal mixer for internal mixing, controlling the temperature of the internal mixer to be reduced to 135 ℃ by using a temperature control system after the feeding is finished, keeping the temperature after the temperature is reached, and carrying out internal mixing for 4min to obtain a mixture;
(3) conveying the mixture prepared in the step (2) to a double-screw extruder through double-cone shearing for melting and mixing, and pressurizing, bracing, cooling and granulating through a melt pump to obtain PE plastic particles for the 5G optical cable sheath;
the working temperature of the double-screw extruder is 160-165 ℃, and the rotating speed of the screw is 80 rpm;
the PE plastic particles for the 5G optical cable sheath are prepared from the following raw material components in parts by weight:
example 2
The processing method of the PE plastic particles for the 5G optical cable sheath in this embodiment is substantially the same as that in embodiment 1, except that the PE plastic particles for the 5G optical cable sheath are prepared from the following raw material components in parts by weight:
and the rest of the PE plastic particles are unchanged, and the prepared PE plastic particles for the 5G optical cable sheath are obtained.
Example 3
The processing method of the PE plastic particles for the 5G optical cable sheath in this embodiment is substantially the same as that in embodiment 1, except that the PE plastic particles for the 5G optical cable sheath are prepared from the following raw material components in parts by weight:
and the rest of the PE plastic particles are unchanged, and the prepared PE plastic particles for the 5G optical cable sheath are obtained.
Comparative example 1
The comparative example is basically the same as the processing method of the PE plastic particles for the 5G optical cable sheath in the example 1, except that the raw material components of the PE plastic particles for the 5G optical cable sheath do not contain LDPE, specifically:
and the rest of the PE plastic particles are unchanged, and the prepared PE plastic particles for the 5G optical cable sheath are obtained.
Comparative example 2
The comparative example is basically the same as the processing method of the PE plastic particles for the 5G optical cable sheath in the example 1, except that the raw material components of the PE plastic particles for the 5G optical cable sheath do not contain EVA, specifically:
the properties of the PE plastic pellets prepared in examples 1-3 and comparative examples 1-2 were measured and reported in Table 1.
Table 1:
the foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A processing method of PE plastic particles for a 5G optical cable sheath is characterized by comprising the following steps:
(1) weighing HDPE, LDPE, EVA and inorganic filler, adding into an internal mixer, stirring and mixing, heating to 125 ℃, and then starting a temperature control system of the internal mixer;
(2) controlling the temperature of an internal mixer at 140-145 ℃, adding a crosslinking agent DCP, an ultraviolet absorbent, a light stabilizer, an antioxidant and a lubricant into the internal mixer for internal mixing, controlling the temperature of the internal mixer to be reduced to 135 ℃ by using a temperature control system after the addition is finished, keeping the temperature after the temperature is reached, and carrying out internal mixing for 3-5min to obtain a mixture;
(3) and (3) conveying the mixture prepared in the step (2) to a double-screw extruder through double-cone shearing for melting and mixing, and pressurizing, bracing, cooling and granulating through a melt pump to obtain the PE plastic particles for the 5G optical cable sheath.
2. The method of claim 1, wherein in step (1), the weight ratio of HDPE to LDPE is 1: (0.3-0.8).
3. The method according to claim 1, wherein the EVA has a VA content of 5-20% by mass.
4. The method of claim 1, wherein the inorganic filler is selected from one or more of alumina, zinc oxide, silica, aluminum nitride, boron nitride, and silicon carbide.
5. A method according to claim 4, characterized in that the particle size of the inorganic filler is 1-10 μm.
6. The method of claim 1, wherein the uv absorber is 2-hydroxy-4-n-octoxybenzophenone;
the light stabilizer is a hindered amine light stabilizer;
the antioxidant is one of hindered phenol antioxidant and amine antioxidant or the combination of hindered phenol antioxidant and amine antioxidant;
the lubricant is one of stearic acid, stearate, polyethylene wax, ethylene bis-stearamide, pentaerythritol bis-stearate or a combination thereof.
7. The method as claimed in claim 1, wherein the twin-screw extruder is operated at a temperature of 155 ℃ and a screw rotation speed of 70 to 90 rpm.
8. The method as claimed in claim 1, wherein the PE plastic particles for the 5G optical cable sheath are prepared from the following raw materials in parts by weight: 50-60 parts of HDPE, 15-48 parts of LDPE, 20-30 parts of EVA, 1-8 parts of inorganic filler, 10-15 parts of crosslinking agent DCP, 0.1-1 part of ultraviolet absorbent, 0.1-0.5 part of light stabilizer, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010509594.4A CN111704758A (en) | 2020-06-05 | 2020-06-05 | Processing method of PE plastic particles for 5G optical cable sheath |
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| CN202010509594.4A CN111704758A (en) | 2020-06-05 | 2020-06-05 | Processing method of PE plastic particles for 5G optical cable sheath |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112898663A (en) * | 2021-01-25 | 2021-06-04 | 孙牡花 | PE composite material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112898663A (en) * | 2021-01-25 | 2021-06-04 | 孙牡花 | PE composite material and preparation method thereof |
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Application publication date: 20200925 |