CN109628015A - Polyolefin hot-melt and preparation method thereof and the composite insulating material for using it - Google Patents
Polyolefin hot-melt and preparation method thereof and the composite insulating material for using it Download PDFInfo
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- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
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- C09J153/025—Vinyl aromatic monomers and conjugated dienes modified
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- C08L2205/00—Polymer mixtures characterised by other features
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- C09J2400/00—Presence of inorganic and organic materials
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- C09J2400/163—Metal in the substrate
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- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
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- C09J2423/00—Presence of polyolefin
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Abstract
The invention discloses a kind of polyolefin hot-melt, the polyolefin hot-melt layer is prepared by following raw material by weight: 30-60 parts of polyolefin resin, 20-40 parts of fire retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of antiblocking agent, 0.1-10 parts of polystyrene hollow microballoon, 100-250 parts of toluene solvant.The present invention has that polarity is low, hygroscopicity is low, insulation performance by force and proof voltage can be stable advantage, under the condition of high temperature and high humidity also with stable insulation performance.
Description
Technical field
The present invention relates to shielding material field more particularly to polyolefin hot-melt and preparation method thereof with use the compound of its
Insulating materials.
Background technique
Flexible flat cable Flexible Flat Cable (FFC) can arbitrarily select wire count and spacing, make on line
It is more convenient, greatly reduce the volume of electronic product, reduce production cost, improves production efficiency, current flexible flat cable
Insulating layer, using polar saturated polyester resin, hygroscopicity is strong, and moisture will lead to insulation impedance and sharply decline, proof voltage
Degradation；Degradable, the loss of properties on aging in high temperature and humidity condition saturated polyester resin.
Summary of the invention
The composite insulating material that it is an object of the invention to propose polyolefin hot-melt and preparation method thereof with use it, with
It solves the above problems.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of polyolefin hot-melt, the polyolefin hot-melt layer are prepared by following raw material by weight: poly-
30-60 parts of olefin resin, 20-40 parts of fire retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of antiblocking agent, polystyrene hollow are micro-
0.1-10 parts and toluene solvant 100-250 parts of ball.
The polyolefin resin is butadiene-styrene rubber, hydrogenated styrene-butadiene rubber, SBS rubber, SEBS rubber, SIS rubber, SEPS rubber
One of glue or styrene or multiple combinations.
The antiblocking agent is one of polyethylene wax powder, polypropylene wax powder or polytetrafluoroethylene (PTFE) wax powder or a variety of groups
It closes；The partial size of the polystyrene hollow microballoon is 1-60 μm.
A kind of production method of polyolefin hot-melt, comprising the following steps:
Step 1: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, it is small to be separately added into stirring at least 2 in reaction kettle
When, the mixing speed of the reaction kettle is 500-1000r/min；
Step 2: taking 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles
Interior, adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step 3: being added 0.1-10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt.
In the step 2, the viscosity of the polyolefin hot-melt is 3000-12000mPas.
Use a kind of composite insulating material of upper polyolefin hot-melt, including pet layer, shielded layer, characteristic impedance
Adjustment layer and polyolefin hot-melt layer, the polyolefin hot-melt layer are formed by curing after being coated by the polyolefin hot-melt, institute
The top that characteristic impedance adjustment layer is covered on the polyolefin hot-melt layer is stated, the shielded layer is covered on the characteristic impedance tune
The top of flood, the pet layer are covered on the top of the shielded layer.The shielded layer is one in stainless steel foil or nickel foil
Kind.
The characteristic impedance adjustment layer is one of PP, PE or PS or multiple combinations, the characteristic impedance adjustment layer
Dielectric constant is 2.0-2.8.
The production method of composite insulating material, comprising the following steps:
Polyolefin hot-melt making step:
Step A: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, and it is small to be separately added into stirring at least 2 in reaction kettle
When, the mixing speed of the reaction kettle is 500-1000r/min；
Step B: 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles are taken
Interior, adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step C: 0.1-10 parts of polystyrene hollow microballoon are added before coating, stirs evenly, obtains polyolefin hot-melt；
Shielded layer making step: pet layer and shielded layer are compounded in the lower surface of pet layer by the compound mode of dry type；
Characteristic impedance adjustment layer making step: characteristic impedance adjustment layer is compounded in the screen by the compound mode of dry type
The lower surface of layer is covered, the dielectric constant of the characteristic impedance adjustment layer is 2.0-2.8；
Polyolefin hot-melt layer making step: it is poly- that one or more layers is coated in the lower surface of the characteristic impedance adjustment layer
Alkene hot melt adhesive, or gathered by hot-melt extruded complex method in compound one or more layers in the lower surface of the characteristic impedance adjustment layer
Then alkene hot melt adhesive is put into 100-150 DEG C of environment and dries, obtains composite insulating material.
In the step B, the viscosity of the polyolefin hot-melt is 3000-12000mPas.
Detailed description of the invention
The present invention will be further described for attached drawing, but the content in attached drawing does not constitute any limitation of the invention.
Fig. 1 is the structural schematic diagram of the one of embodiment of the present invention；
Wherein: pet layer 1, shielded layer 2, characteristic impedance adjustment layer 3, polyolefin hot-melt layer 4.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
A kind of polyolefin hot-melt of the present embodiment, the polyolefin hot-melt layer is by following raw material system by weight
It is standby to form: 30-60 parts of polyolefin resin, 20-40 parts of fire retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of antiblocking agent, polyphenyl
0.1-10 parts and toluene solvant 100-250 parts of ethylene tiny balloon.
The polyolefin resin is butadiene-styrene rubber, hydrogenated styrene-butadiene rubber, SBS (polystyrene-polybutadiene-polystyrene
Block copolymer) rubber, SEBS (hydrogenated styrene-butadiene block copolymer) rubber, SIS (the poly- isoamyl of linear polystyrene-
Diene-polystyrene triblock copolymer) rubber, SEPS (styrene ethylene-propylene-styrene type block copolymer) rubber
Or one of styrene or multiple combinations.
Polyolefin resin has the advantages that dielectric loss is low, preferably hydrogenated styrene-butadiene rubber.
The antiblocking agent is one of polyethylene wax powder, polypropylene wax powder or polytetrafluoroethylene (PTFE) wax powder or a variety of groups
It closes.
Polyolefin wax powder includes that the dielectric constant of its fluorinated modified compound is low, can reduce the dielectric constant of glue film.
The partial size of the polystyrene hollow microballoon is 1-60 μm, and the partial size of polystyrene hollow microballoon is preferably 10-40 μ
M, when the partial size of polystyrene hollow microballoon is less than 1 μm or when additive amount is less than 0.1 parts by weight, can not play reduces dielectric damage
The effect of consumption, when the partial size of polystyrene hollow microballoon is greater than 60 μm, coating appearance is poor, is unable to satisfy use demand；
When the additive amount of polystyrene hollow microballoon is greater than 10 parts by weight, the cohesive force of polyolefin hot-melt can be made to decline, influence to glue
Tie power.
The production method of polyolefin hot-melt, comprising the following steps:
Step 1: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, it is small to be separately added into stirring at least 2 in reaction kettle
When, the mixing speed of the reaction kettle is 500-1000r/min；
Step 2: taking 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles
Interior, adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step 3: being added 0.1-10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt.
In step 2, the viscosity of the polyolefin hot-melt is 3000-12000mPas.
Polystyrene hollow microballoon is added in polyolefin hot-melt layer 4, micropore processing is carried out to polyolefin hot-melt, and
Polystyrene itself has lower dielectric constant, and the dielectric constant and fissipation factor of insulating layer, and polyphenyl can be effectively reduced
Ethylene tiny balloon has lighter weight compared to glass hollow microballoon, makes polyolefin hot-melt more lightweight.
Using a kind of composite insulating material of above-mentioned polyolefin hot-melt, as shown in Figure 1, include pet layer, shielded layer,
Characteristic impedance adjustment layer and polyolefin hot-melt layer, the polyolefin hot-melt layer solidify after being coated by the polyolefin hot-melt
It is formed, the characteristic impedance adjustment layer is covered on the top of the polyolefin hot-melt layer, and the shielded layer is covered on the spy
The top of property impedance adjustment layer, the pet layer are covered on the top of the shielded layer.
Polyolefin hot-melt has that polarity is low, hygroscopicity is low, and the advantage that insulation performance is strong and proof voltage can be stable has
Preferable resistance to ag(e)ing, making composite insulating material under the condition of high temperature and high humidity as insulating layer using polyolefin hot-melt also has
Relatively stable insulation performance.
The shielded layer 2 is one of stainless steel foil or nickel foil.
Shielded layer 2 can have preferable corrosion resistance using stainless steel foil or nickel foil.
The characteristic impedance adjustment layer 3 is one of PP (polypropylene), PE (polyethylene) or PS (polystyrene) or more
Kind combination, the dielectric constant of the characteristic impedance adjustment layer 3 are 2.0-2.8.
Since different industries is when using FFC, the characteristic impedance of FFC is required it is different, can in production according to
The requirement of characteristic impedance adjusts the thickness of characteristic impedance layer, to reach the requirement of corresponding characteristic impedance.
Embodiment 1:
The shielded layer 2 is compounded in the lower section of the pet layer 1, and the characteristic impedance adjustment layer 3 is compounded in the shielded layer
2 lower section, the polyolefin hot-melt layer 4 is compounded in 3 lower section of characteristic impedance adjustment layer, wherein the shielded layer 2 is selected
Stainless steel foil, the characteristic impedance adjustment layer are PP, and the polyolefin hot-melt layer is by 50 parts of hydrogenated styrene-butadiene rubber resin, ten bromines
25 parts of diphenylethane, 10 parts of antimony oxide, 5 parts of polytetrafluoroethylene (PTFE) wax powder, 10 parts of polystyrene hollow microballoon and toluene solvant
200 parts are formulated.
Embodiment 2:
The shielded layer 2 of the present embodiment selects nickel foil, remaining feature is same as Example 1.
Embodiment 3:
The shielded layer 2 of the present embodiment selects aluminium foil, remaining feature is same as Example 1.
Embodiment 4:
It is aluminized by way of vacuum evaporation in the lower surface of the pet layer 1, it is then that characteristic impedance adjustment layer 3 is compound
In the lower section of pet layer 1, polyolefin hot-melt layer 4 is compounded in the lower section of characteristic impedance adjustment layer 3；Remaining feature and 1 phase of embodiment
Together.
Performance detection
1, salt spray resistance is tested: composite insulating material being pressed into wire rod, connector is put on, is then placed in neutral salt spray
It 96 hours in environment, then takes out, observes the corrosion condition of metal foil surface: it is non-discolouring if the surface of metal foil is smooth, then it is multiple
The salt spray resistance for closing insulating materials is excellent；If the surface of metal foil is smooth, but colour changed into yellow, then the salt tolerant of composite insulating material
Mist is functional；If the rough surface hole of metal foil, and colour changed into yellow, then the salt spray resistance of composite insulating material is poor.
2, antioxygenic property is tested: composite insulating material being pressed into wire rod, puts on connector, then in 105 DEG C of environment
It is lower to place 96 hours, then using the ground resistance of the resistance grade test composite insulating material of multimeter；If ground resistance < 0.2
Ω, then the antioxygenic property of composite insulating material is excellent；If 0.2 Ω≤ground resistance is≤10 Ω, composite insulating material
Antioxygenic property is general；If 10 Ω of ground resistance >, the antioxygenic property of composite material are poor.
The resistance to mist testing result of table 1- embodiment 1-4 composite insulating material
| Salt spray resistance | Ground resistance | Antioxygenic property | |
| Embodiment 1 | It is excellent | Less than 0.2 Ω | It is excellent |
| Embodiment 2 | It is excellent | Less than 0.2 Ω | It is excellent |
| Comparative example 1 | Difference | 6-8Ω | Generally |
| Comparative example 2 | Difference | Insulation | Difference |
By embodiment 1-4 it is found that using stainless steel foil or nickel foil as the shielded layer 2 of composite insulating material compared to using
Aluminium foil can have better salt spray resistance and antioxygenic property, and have lower ground resistance.
The production method of composite insulating material, comprising the following steps:
Polyolefin hot-melt making step:
Step A: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, and it is small to be separately added into stirring at least 2 in reaction kettle
When, the mixing speed of the reaction kettle is 500-1000r/min；
Step B: 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles are taken
Interior, adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step C: 0.1-10 parts of polystyrene hollow microballoon are added before coating, stirs evenly, obtains polyolefin hot-melt；
2 making step of shielded layer: pet layer 1 and shielded layer 2 are compounded in the following table of pet layer 1 by the compound mode of dry type
Face；
3 making step of characteristic impedance adjustment layer: characteristic impedance adjustment layer 3 is compounded in by the compound mode of dry type described
The lower surface of shielded layer 2, the dielectric constant of the characteristic impedance adjustment layer 3 are 2.0-2.8；
4 making step of polyolefin hot-melt layer: one or more layers is coated in the lower surface of the characteristic impedance adjustment layer 3
Polyolefin hot-melt, or by hot-melt extruded complex method compound one layer or more in the lower surface of the characteristic impedance adjustment layer 3
Layer polyolefin hot-melt, is then put into 100-150 DEG C of environment and dries, obtain composite insulating material.
In the step B, the viscosity of the polyolefin hot-melt is 3000-12000mPas.
Embodiment 5:
Polyolefin hot-melt making step:
Step 1: taking 50 parts and 150 parts of toluene of polyolefin resin, be separately added into stirring 2 hours, the reaction in reaction kettle
The mixing speed of kettle is 800r/min；
Step 2: taking in 2.5 parts of antiblocking agent, 40 parts of fire retardant and 8.5 parts of the synergistic flame retardant addition reaction kettles, adjust
Whole mixing speed is 2000r/min, until fineness is less than 10 μm；
Step 3: being added 10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt；
In the present embodiment, polyolefin resin is hydrogenated styrene-butadiene rubber resin, and fire retardant is decabromodiphenylethane, synergistic resistance
Combustion agent is antimony oxide, and antiblocking agent is polytetrafluoroethylene (PTFE) wax powder；
2 making step of shielded layer: pet layer 1 and shielded layer 2 are compounded in the following table of pet layer 1 by the compound mode of dry type
Face；
3 making step of characteristic impedance adjustment layer: characteristic impedance adjustment layer 3 is compounded in by the compound mode of dry type described
The lower surface of shielded layer 2；
4 making step of polyolefin hot-melt layer: 3 strata alkene are coated in the lower surface of the characteristic impedance adjustment layer 3
Then hot melt adhesive is put into 125 DEG C of environment and dries, obtains composite insulating material.
Embodiment 6:
In the present embodiment, polyolefin resin is SEBS rubber resin, remaining feature is same as Example 5.
Embodiment 7:
In the present embodiment, polyolefin resin is SEPS rubber resin, remaining feature is same as Example 5.
Embodiment 8:
Polyolefin hot-melt making step:
Step 1: taking 50 parts and 150 parts of toluene of polyolefin resin, be separately added into stirring 2 hours, the reaction in reaction kettle
The mixing speed of kettle is 800r/min；
Step 2: taking in 2.5 parts of antiblocking agent, 40 parts of fire retardant and 13.5 parts of the synergistic flame retardant addition reaction kettles, adjust
Whole mixing speed is 2000r/min, until fineness is less than 10 μm；
Step 3: being added 10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt；
In the present embodiment, polyolefin resin is SEBS rubber resin, remaining feature is same as Example 5.
Comparative example 1:
Hot melt adhesive making step:
Step 1: 50 parts and 150 parts of toluene of saturated polyester resin are taken, stirring 2 hours in reaction kettle are separately added into, it is described anti-
The mixing speed for answering kettle is 800r/min；
Step 2: taking in 2.5 parts of antiblocking agent, 40 parts of fire retardant and 8.5 parts of the synergistic flame retardant addition reaction kettles, adjust
Whole mixing speed is 2000r/min, until fineness less than 10 μm, obtains hot melt adhesive；
Remaining feature of this comparative example is same as Example 5.
Comparative example 2:
Hot melt adhesive making step:
Step 1: taking 50 parts and 150 parts of toluene of polyolefin resin, be separately added into stirring 2 hours, the reaction in reaction kettle
The mixing speed of kettle is 800r/min；
Step 2: taking in 2.5 parts of antiblocking agent, 40 parts of fire retardant and 8.5 parts of the synergistic flame retardant addition reaction kettles, adjust
Whole mixing speed is 2000r/min, until fineness less than 10 μm, obtains hot melt adhesive；
In the present embodiment, polyolefin resin is SEBS rubber resin, remaining feature is same as Example 5.
Comparative example 3:
Polyolefin hot-melt making step:
Step 1: taking 50 parts and 150 parts of toluene of polyolefin resin, be separately added into stirring 2 hours, the reaction in reaction kettle
The mixing speed of kettle is 800r/min；
Step 2: taking 40 parts and 8.5 parts of synergistic flame retardant of fire retardant to be added in the reaction kettle, adjustment mixing speed is
2000r/min, until fineness is less than 10 μm；
Step 3: being added 10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt；
In the present embodiment, polyolefin resin is SEPS rubber resin, remaining feature is same as Example 5.
Comparative example 4:
Polyolefin hot-melt making step:
Step 1: taking 50 parts and 150 parts of toluene of polyolefin resin, be separately added into stirring 2 hours, the reaction in reaction kettle
The mixing speed of kettle is 800r/min；
Step 2: taking in 2.5 parts of antiblocking agent, 40 parts of fire retardant and 8.5 parts of the synergistic flame retardant addition reaction kettles, adjust
Whole mixing speed is 2000r/min, until fineness is less than 10 μm；
Step 3: being added 1 part of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt；
In the present embodiment, polyolefin resin is SEPS rubber resin, and antiblocking agent is silica；Remaining feature and reality
It is identical to apply example 5.
Performance test
1, resist and return viscoelastic test: it is 1000m that composite insulating material, which is cut into length, and width is the sample of 100mm, is then rolled up
At web-like, then composite insulating material entire volume is put into 40 DEG C of environment and is placed 96 hours；It takes out sample to rewind, test close
Uncoiling power at core 50m；If uncoiling power < 0.25N, it is judged to being determined as if 0.25≤uncoiling power≤1.0N without returning viscous
It slightly returns viscous；It is judged to returning if uncoiling power > 1.0N viscous.
2, it flame retardant test: is tested according to UL94 standard.
3, hygroscopicity is tested: being tested according to ISO62 standard.
4, anti-excessive glue performance test: composite insulating material is pressed into wire rod, snap-on-connector is then put on, then line
Material is placed in 105 DEG C of environment 96 hours, and the conductor and surrounding hot melt adhesive of snap-on-connector are observed after wire rod is taken out
Mobility status is determined as there is excessive glue if conductive surface has hot melt adhesive；If the surface of conductor does not have hot melt adhesive, it is determined as nothing
Excessive glue.
5, ageing-resistant performance: composite insulating material being placed in 125 DEG C of environment 500 hours, is then taken out compound exhausted
Edge material observes the appearance of composite insulating material and tests its flexibility, if composite insulating material appearance is without color change and tool
There is preferable flexibility, can then determine that the ageing-resistant performance of composite insulating material is excellent with free bend；If composite insulating material
Colour changed into yellow, but have preferable flexibility, can then determine that the ageing-resistant performance of composite insulating material is good with free bend
It is good；If the colour changed into yellow of composite insulating material, and will appear fracture in bending, then determine the resistance to ag(e)ing of composite insulating material
It can be poor.
6, it dielectric constant and loss factor test: is tested according to GB/T1693-2007 standard.
The performance test results of table 2- embodiment 5-8 and comparative example 1-4
It is compared respectively with comparative example 1 by embodiment 1-7 it is found that using polyolefin resin compared to using saturated resin
Can have lower hygroscopicity, more preferably anti-excessive glue performance and ageing-resistant performance and have lower dielectric constant and loss because
Number；By embodiment 7 and comparative example 3 comparison it is found that using antiblocking agent can effectively solve composite insulating material occur returning it is viscous
Problem；Compared by embodiment 6 and embodiment 8 it is found that the use ratio for increasing synergistic flame retardant antimony oxide can be significant increase
Add the dielectric constant and loss factor of composite insulating material, therefore, flame retardant decabromodiphenylethane and synergistic flame retardant three aoxidize
The ratio of two antimony is preferably controlled within 5:1；It is compared by embodiment 6 and comparative example 2 it is found that polystyrene sky is added in hot melt adhesive
The dielectric constant and fissipation factor that composite insulating material can be effectively reduced of heart microballoon；It can by embodiment 7 and the comparison of comparative example 4
Know, can all prevent composite insulating material from occurring returning viscous situation using different antiblocking agents, but use polytetrafluoroethylwax wax
Powder compared to use silica have lower dielectric constant and loss factor.
The technical principle of the invention is described above in combination with a specific embodiment.These descriptions are intended merely to explain of the invention
Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, the technology of this field
Personnel can associate with other specific embodiments of the invention without creative labor, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. a kind of polyolefin hot-melt, which is characterized in that the polyolefin hot-melt layer is by following raw material system by weight
It is standby to form: 30-60 parts of polyolefin resin, 20-40 parts of fire retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of antiblocking agent, polyphenyl
0.1-10 parts and toluene solvant 100-250 parts of ethylene tiny balloon.
2. a kind of polyolefin hot-melt according to claim 1, which is characterized in that the polyolefin resin is butylbenzene rubber
One of glue, hydrogenated styrene-butadiene rubber, SBS rubber, SEBS rubber, SIS rubber, SEPS rubber or styrene or multiple combinations.
3. a kind of polyolefin hot-melt according to claim 1, which is characterized in that the antiblocking agent is polyethylene wax
One of powder, polypropylene wax powder or polytetrafluoroethylene (PTFE) wax powder or multiple combinations；The partial size of the polystyrene hollow microballoon is
1-60μm。
4. a kind of production method of polyolefin hot-melt, which comprises the following steps:
Step 1: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, be separately added into stirring at least 2 hours, institute in reaction kettle
The mixing speed for stating reaction kettle is 500-1000r/min；
Step 2: it takes in 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles,
Adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step 3: being added 0.1-10 parts of polystyrene hollow microballoon, stir evenly, obtain polyolefin hot-melt.
5. a kind of production method of polyolefin hot-melt according to claim 4, which is characterized in that in the step 2,
The viscosity of the polyolefin hot-melt is 3000-12000mPas.
6. using a kind of composite insulating material of polyolefin hot-melt as described in any one of claims 1-3, which is characterized in that
Including pet layer, shielded layer, characteristic impedance adjustment layer and polyolefin hot-melt layer, the polyolefin hot-melt layer is by the polyene
It is formed by curing after the coating of hydrocarbon hot melt adhesive, the characteristic impedance adjustment layer is covered on the top of the polyolefin hot-melt layer, described
Shielded layer is covered on the top of the characteristic impedance adjustment layer, and the pet layer is covered on the top of the shielded layer.
7. composite insulating material according to claim 6, which is characterized in that the shielded layer is in stainless steel foil or nickel foil
One kind.
8. composite insulating material according to claim 6, which is characterized in that the characteristic impedance adjustment layer be PP, PE or
One of PS or multiple combinations, the dielectric constant of the characteristic impedance adjustment layer are 2.0-2.8.
9. the production method of composite insulating material, which comprises the following steps:
Polyolefin hot-melt making step:
Step A: taking 30-60 parts and toluene 100-250 parts of polyolefin resin, is separately added into stirring at least 2 hours, institute in reaction kettle
The mixing speed for stating reaction kettle is 500-1000r/min；
Step B: taking in 0.1-5 parts of antiblocking agent, 20-40 parts of fire retardant and 6-15 parts of the synergistic flame retardant addition reaction kettles,
Adjustment mixing speed is 1000-3000r/min, until fineness is less than 10 μm；
Step C: 0.1-10 parts of polystyrene hollow microballoon are added before coating, stirs evenly, obtains polyolefin hot-melt；
Shielded layer making step: pet layer and shielded layer are compounded in the lower surface of pet layer by the compound mode of dry type；
Characteristic impedance adjustment layer making step: characteristic impedance adjustment layer is compounded in the shielded layer by the compound mode of dry type
Lower surface, the dielectric constant of the characteristic impedance adjustment layer is 2.0-2.8；
Polyolefin hot-melt layer making step: one or more layers polyolefin is coated in the lower surface of the characteristic impedance adjustment layer
Hot melt adhesive, or by hot-melt extruded complex method in one or more layers compound polyolefin of the lower surface of the characteristic impedance adjustment layer
Then hot melt adhesive is put into 100-150 DEG C of environment and dries, obtains composite insulating material.
10. the production method of composite insulating material according to claim 9, which is characterized in that in the step B, institute
The viscosity for stating polyolefin hot-melt is 3000-12000mPas.
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| CN112037984A (en) * | 2020-08-31 | 2020-12-04 | 远东电缆有限公司 | High-temperature-resistant halogen-free flame-retardant environment-friendly cable for smart energy motor train unit and production process |
| CN115216242A (en) * | 2021-04-16 | 2022-10-21 | 俊驰材料科技股份有限公司 | Hot melt adhesive tape and method of making and using same |
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| CN109628015B (en) | 2020-12-22 |
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