CN109628015B - Polyolefin hot melt adhesive, preparation method thereof and composite insulating material using polyolefin hot melt adhesive - Google Patents
Polyolefin hot melt adhesive, preparation method thereof and composite insulating material using polyolefin hot melt adhesive Download PDFInfo
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J115/00—Adhesives based on rubber derivatives
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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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
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
- 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
- C09J7/29—Laminated material
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- C09J7/00—Adhesives in the form of films or foils
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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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
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
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- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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Abstract
The invention discloses a polyolefin hot melt adhesive, which is prepared from the following raw materials in parts by weight: 30-60 parts of polyolefin resin, 20-40 parts of flame retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of anti-blocking agent, 0.1-10 parts of polystyrene hollow microspheres and 250 parts of toluene solvent. The invention has the advantages of low polarity, low hygroscopicity, strong insulating property and stable voltage resistance, and has stable insulating property under high temperature and high humidity conditions.
Description
Technical Field
The invention relates to the field of shielding materials, in particular to a polyolefin hot melt adhesive, a preparation method thereof and a composite insulating material using the polyolefin hot melt adhesive.
Background
The Flexible Flat Cable (FFC) can select the number and the spacing of the conducting wires at will, so that the connection is more convenient, the volume of an electronic product is greatly reduced, the production cost is reduced, and the production efficiency is improved; the saturated polyester resin is easy to degrade under the high-temperature and high-humidity condition, and the ageing resistance is poor.
Disclosure of Invention
The invention aims to provide a polyolefin hot melt adhesive, a preparation method thereof and a composite insulating material using the polyolefin hot melt adhesive, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the polyolefin hot melt adhesive layer is prepared from the following raw materials in parts by weight: 30-60 parts of polyolefin resin, 20-40 parts of flame retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of anti-blocking agent, 0.1-10 parts of polystyrene hollow microspheres and 250 parts of toluene solvent 100-.
The polyolefin resin is one or a combination of more of styrene-butadiene rubber, hydrogenated styrene-butadiene rubber, SBS rubber, SEBS rubber, SIS rubber, SEPS rubber or styrene.
The anti-blocking agent is one or a combination of a plurality of polyethylene wax powder, polypropylene wax powder or polytetrafluoroethylene wax powder; the particle size of the polystyrene hollow microsphere is 1-60 mu m.
A method for preparing polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 30-60 parts of polyolefin resin and 250 parts of toluene 100-;
step 2: adding 0.1-5 parts of anti-blocking agent, 20-40 parts of flame retardant and 6-15 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to be 1000-3000r/min until the fineness is less than 10 mu m;
and step 3: and adding 0.1-10 parts of polystyrene hollow microspheres, and uniformly stirring to obtain the polyolefin hot melt adhesive.
In the step 2, the viscosity of the polyolefin hot melt adhesive is 3000-12000 mPas.
Use a composite insulating material of polyolefin hot melt adhesive, including PET layer, shielding layer, characteristic impedance adjustment layer and polyolefin hot melt adhesive layer, polyolefin hot melt adhesive layer by polyolefin hot melt adhesive coating postcure forms, characteristic impedance adjustment layer covers the top of polyolefin hot melt adhesive layer, the shielding layer covers the top of characteristic impedance adjustment layer, the PET layer covers the top of shielding layer. The shielding layer is one of stainless steel foil or nickel foil.
The characteristic impedance adjusting layer is one or a combination of PP, PE or PS, and the dielectric constant of the characteristic impedance adjusting layer is 2.0-2.8.
The manufacturing method of the composite insulating material comprises the following steps:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step A: respectively adding 30-60 parts of polyolefin resin and 250 parts of toluene 100-;
and B: adding 0.1-5 parts of anti-blocking agent, 20-40 parts of flame retardant and 6-15 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to be 1000-3000r/min until the fineness is less than 10 mu m;
and C: adding 0.1-10 parts of polystyrene hollow microspheres before coating, and uniformly stirring to obtain a polyolefin hot melt adhesive;
a shielding layer manufacturing step: compounding the PET layer and the shielding layer on the lower surface of the PET layer in a dry compounding manner;
the characteristic impedance adjusting layer manufacturing step: compounding a characteristic impedance adjusting layer on the lower surface of the shielding layer in a dry compounding mode, wherein the dielectric constant of the characteristic impedance adjusting layer is 2.0-2.8;
the manufacturing steps of the polyolefin hot melt adhesive layer are as follows: and coating one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer, or compounding one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer in a hot melt extrusion compounding manner, and then drying in an environment of 100-150 ℃ to obtain the composite insulating material.
In the step B, the viscosity of the polyolefin hot melt adhesive is 3000-12000 mPas.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
wherein: PET layer 1, shielding layer 2, characteristic impedance adjustment layer 3, polyolefin hot melt adhesive layer 4.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The polyolefin hot melt adhesive layer is prepared from the following raw materials in parts by weight: 30-60 parts of polyolefin resin, 20-40 parts of flame retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of anti-blocking agent, 0.1-10 parts of polystyrene hollow microspheres and 250 parts of toluene solvent 100-.
The polyolefin resin is one or a combination of more of styrene-butadiene rubber, hydrogenated styrene-butadiene rubber, SBS (polystyrene-polybutadiene-polystyrene block copolymer) rubber, SEBS (hydrogenated styrene-butadiene block copolymer) rubber, SIS (linear polystyrene-polyisoprene-polystyrene triblock copolymer) rubber, SEPS (styrene-ethylene-propylene-styrene type block copolymer) rubber or styrene.
The polyolefin resin has an advantage of low dielectric loss, and hydrogenated styrene-butadiene rubber is preferred.
The anti-blocking agent is one or a combination of polyethylene wax powder, polypropylene wax powder or polytetrafluoroethylene wax powder.
The polyolefin wax powder including the fluorinated modified compound has low dielectric constant, and can reduce the dielectric constant of the adhesive film.
The particle size of the polystyrene hollow microsphere is 1-60 mu m, the particle size of the polystyrene hollow microsphere is preferably 10-40 mu m, when the particle size of the polystyrene hollow microsphere is smaller than 1 mu m or the addition amount is smaller than 0.1 part by weight, the effect of reducing dielectric loss cannot be achieved, and when the particle size of the polystyrene hollow microsphere is larger than 60 mu m, the coating appearance is poor, and the use requirement cannot be met; when the addition amount of the polystyrene hollow microspheres is more than 10 parts by weight, the cohesive force of the polyolefin hot melt adhesive is reduced, and the adhesive force is influenced.
The preparation method of the polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 30-60 parts of polyolefin resin and 250 parts of toluene 100-;
step 2: adding 0.1-5 parts of anti-blocking agent, 20-40 parts of flame retardant and 6-15 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to be 1000-3000r/min until the fineness is less than 10 mu m;
and step 3: and adding 0.1-10 parts of polystyrene hollow microspheres, and uniformly stirring to obtain the polyolefin hot melt adhesive.
In step 2, the viscosity of the polyolefin hot melt adhesive is 3000-12000 mPas.
The polystyrene hollow microspheres are added into the polyolefin hot melt adhesive layer 4 to carry out micropore treatment on the polyolefin hot melt adhesive, the polystyrene has a lower dielectric constant, the dielectric constant and the loss factor of the insulating layer can be effectively reduced, and the polystyrene hollow microspheres have lighter weight compared with the glass hollow microspheres, so that the polyolefin hot melt adhesive is lighter.
Use foretell composite insulation material of polyolefin hot melt adhesive, as shown in figure 1, including PET layer, shielding layer, characteristic impedance adjustment layer and polyolefin hot melt adhesive layer, polyolefin hot melt adhesive layer by polyolefin hot melt adhesive coating postcure forms, characteristic impedance adjustment layer covers the top of polyolefin hot melt adhesive layer, the shielding layer covers the top of characteristic impedance adjustment layer, the PET layer covers the top of shielding layer.
The polyolefin hot melt adhesive has the advantages of low polarity, low hygroscopicity, strong insulating property and stable voltage resistance, has better aging resistance, and adopts the polyolefin hot melt adhesive as an insulating layer to ensure that the composite insulating material has more stable insulating property under the conditions of high temperature and high humidity.
The shielding layer 2 is one of stainless steel foil or nickel foil.
The shielding layer 2 can have better corrosion resistance by adopting stainless steel foil or nickel foil.
The characteristic impedance adjusting layer 3 is one or a combination of PP (polypropylene), PE (polyethylene) or PS (polystyrene), and the dielectric constant of the characteristic impedance adjusting layer 3 is 2.0-2.8.
Because different industries have different requirements on the characteristic impedance of the FFC when the FFC is used, the thickness of the characteristic impedance layer can be adjusted according to the requirements on the characteristic impedance during production so as to meet the requirements on the corresponding characteristic impedance.
Example 1:
the shielding layer 2 is compounded below the PET layer 1, the characteristic impedance adjusting layer 3 is compounded below the shielding layer 2, the polyolefin hot melt adhesive layer 4 is compounded below the characteristic impedance adjusting layer 3, the shielding layer 2 is made of stainless steel foil, the characteristic impedance adjusting layer is PP, and the polyolefin hot melt adhesive layer is prepared from 50 parts of hydrogenated styrene-butadiene rubber resin, 25 parts of decabromodiphenylethane, 10 parts of antimony trioxide, 5 parts of polytetrafluoroethylene wax powder, 10 parts of polystyrene hollow microspheres and 200 parts of toluene solvent.
Example 2:
the shielding layer 2 of this example was made of nickel foil, and the remaining characteristics were the same as those of example 1.
Example 3:
the shielding layer 2 of this embodiment is made of aluminum foil, and the rest of the characteristics are the same as those of embodiment 1.
Example 4:
plating aluminum on the lower surface of the PET layer 1 in a vacuum evaporation mode, then compounding the characteristic impedance adjusting layer 3 below the PET layer 1, and compounding the polyolefin hot melt adhesive layer 4 below the characteristic impedance adjusting layer 3; the remaining features are the same as in example 1.
Performance detection
1. Testing the salt spray resistance: pressing the composite insulating material into a wire, sleeving a connector, placing in a neutral salt fog environment for 96 hours, taking out, and observing the corrosion condition of the surface of the metal foil: if the surface of the metal foil is smooth and does not change color, the salt spray resistance of the composite insulating material is excellent; if the surface of the metal foil is smooth but the color of the metal foil turns yellow, the salt spray resistance of the composite insulating material is good; if the surface of the metal foil is rough and has holes and the color turns yellow, the salt spray resistance of the composite insulating material is poor.
2. And (3) testing the oxidation resistance: pressing the composite insulating material into a wire, sleeving a connector on the wire, placing the wire for 96 hours in an environment of 105 ℃, and testing the grounding resistance of the composite insulating material by using a resistance level of a universal meter; if the grounding resistance is less than 0.2 omega, the oxidation resistance of the composite insulating material is excellent; if the grounding resistance is less than or equal to 10 omega and less than or equal to 0.2 omega, the oxidation resistance of the composite insulating material is general; if the grounding resistance is larger than 10 omega, the oxidation resistance of the composite material is poor.
Table 1-results of fog resistance test of composite insulating materials of examples 1 to 4
| Salt spray resistance | Grounding resistor | Antioxidant property | |
| Example 1 | Is excellent in | Less than 0.2 omega | Is excellent in |
| Example 2 | Is excellent in | Less than 0.2 omega | Is excellent in |
| Comparative example 1 | Difference (D) | 6-8Ω | In general |
| Comparative example 2 | Difference (D) | Insulation | Difference (D) |
As can be seen from examples 1 to 4, the shield layer 2 using a stainless steel foil or a nickel foil as a composite insulating material can have better salt spray resistance and oxidation resistance and lower ground resistance than using an aluminum foil.
The manufacturing method of the composite insulating material comprises the following steps:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step A: respectively adding 30-60 parts of polyolefin resin and 250 parts of toluene 100-;
and B: adding 0.1-5 parts of anti-blocking agent, 20-40 parts of flame retardant and 6-15 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to be 1000-3000r/min until the fineness is less than 10 mu m;
and C: adding 0.1-10 parts of polystyrene hollow microspheres before coating, and uniformly stirring to obtain a polyolefin hot melt adhesive;
the manufacturing step of the shielding layer 2 is as follows: compounding the PET layer 1 and the shielding layer 2 on the lower surface of the PET layer 1 in a dry compounding manner;
the manufacturing step of the characteristic impedance adjusting layer 3: compounding a characteristic impedance adjusting layer 3 on the lower surface of the shielding layer 2 in a dry compounding manner, wherein the dielectric constant of the characteristic impedance adjusting layer 3 is 2.0-2.8;
the manufacturing step of the polyolefin hot melt adhesive layer 4 is as follows: coating one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer 3, or compounding one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer 3 in a hot melt extrusion compounding manner, and then drying in an environment of 100-150 ℃ to obtain the composite insulating material.
In the step B, the viscosity of the polyolefin hot melt adhesive is 3000-12000 mPas.
Example 5:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 50 parts of polyolefin resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 2.5 parts of anti-blocking agent, 40 parts of flame retardant and 8.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m;
and step 3: adding 10 parts of polystyrene hollow microspheres, and uniformly stirring to obtain a polyolefin hot melt adhesive;
in this embodiment, the polyolefin resin is hydrogenated styrene-butadiene rubber resin, the flame retardant is decabromodiphenylethane, the synergistic flame retardant is antimony trioxide, and the anti-blocking agent is polytetrafluoroethylene wax powder;
the manufacturing step of the shielding layer 2 is as follows: compounding the PET layer 1 and the shielding layer 2 on the lower surface of the PET layer 1 in a dry compounding manner;
the manufacturing step of the characteristic impedance adjusting layer 3: compounding a characteristic impedance adjusting layer 3 on the lower surface of the shielding layer 2 in a dry compounding manner;
the manufacturing step of the polyolefin hot melt adhesive layer 4 is as follows: and coating 3 layers of polyolefin hot melt adhesive on the lower surface of the characteristic impedance adjusting layer 3, and then drying in an environment at 125 ℃ to obtain the composite insulating material.
Example 6:
in this example, the polyolefin resin was SEBS rubber resin, and the remaining characteristics were the same as in example 5.
Example 7:
in this example, the polyolefin resin was a SEPS rubber resin, and the remaining characteristics were the same as in example 5.
Example 8:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 50 parts of polyolefin resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 2.5 parts of anti-blocking agent, 40 parts of flame retardant and 13.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m;
and step 3: adding 10 parts of polystyrene hollow microspheres, and uniformly stirring to obtain a polyolefin hot melt adhesive;
in this example, the polyolefin resin was SEBS rubber resin, and the remaining characteristics were the same as in example 5.
Comparative example 1:
the hot melt adhesive preparation step:
step 1: respectively adding 50 parts of saturated polyester resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 2.5 parts of anti-blocking agent, 40 parts of flame retardant and 8.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m to obtain the hot melt adhesive;
the remaining characteristics of this comparative example were the same as example 5.
Comparative example 2:
the hot melt adhesive preparation step:
step 1: respectively adding 50 parts of polyolefin resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 2.5 parts of anti-blocking agent, 40 parts of flame retardant and 8.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m to obtain the hot melt adhesive;
in this example, the polyolefin resin was SEBS rubber resin, and the remaining characteristics were the same as in example 5.
Comparative example 3:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 50 parts of polyolefin resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 40 parts of flame retardant and 8.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m;
and step 3: adding 10 parts of polystyrene hollow microspheres, and uniformly stirring to obtain a polyolefin hot melt adhesive;
in this example, the polyolefin resin was a SEPS rubber resin, and the remaining characteristics were the same as in example 5.
Comparative example 4:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step 1: respectively adding 50 parts of polyolefin resin and 150 parts of toluene into a reaction kettle, and stirring for 2 hours at the stirring speed of 800 r/min;
step 2: adding 2.5 parts of anti-blocking agent, 40 parts of flame retardant and 8.5 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to 2000r/min until the fineness is less than 10 mu m;
and step 3: adding 1 part of polystyrene hollow microspheres, and uniformly stirring to obtain a polyolefin hot melt adhesive;
in this example, the polyolefin resin is a SEPS rubber resin, and the antiblocking agent is silica; the remaining features are the same as in example 5.
Performance testing
1. Anti-blocking test: cutting the composite insulating material into samples with the length of 1000m and the width of 100mm, rolling the samples into a roll, and putting the whole roll of the composite insulating material into an environment at 40 ℃ for 96 hours; taking out the sample for rewinding, and testing the unwinding force at a position 50m close to the winding core; if the unwinding force is less than 0.25N, judging that the adhesive is not sticky, and if the unwinding force is more than or equal to 0.25 and less than or equal to 1.0N, judging that the adhesive is slightly sticky; if the unwinding force is larger than 1.0N, the adhesive is judged to be sticky.
2. And (3) flame retardant test: the test was carried out according to the UL94 standard.
3. Moisture absorption test: the test was carried out according to ISO62 standard.
4. And (3) testing the anti-glue-overflow performance: pressing the composite insulating material into a wire rod, sleeving the wire rod with the buckle type connector, placing the wire rod in an environment at 105 ℃ for 96 hours, taking out the wire rod, observing the flowing condition of a conductor of the buckle type connector and surrounding hot melt adhesive, and judging that the adhesive overflows if the surface of the conductor has the hot melt adhesive; and if the surface of the conductor does not have the hot melt adhesive, judging that no glue overflows.
5. Aging resistance: placing the composite insulating material in an environment of 125 ℃ for 500 hours, then taking out the composite insulating material, observing the appearance of the composite insulating material and testing the flexibility of the composite insulating material, and if the composite insulating material has no color change in the appearance, has good flexibility and can be freely bent, judging that the aging resistance of the composite insulating material is excellent; if the color of the composite insulating material turns yellow, but the composite insulating material has better flexibility and can be freely bent, the aging resistance of the composite insulating material is judged to be good; if the color of the composite insulating material turns yellow and cracks appear during bending, the aging resistance of the composite insulating material is judged to be poor.
6. Dielectric constant and loss tangent test: the test was carried out according to GB/T1693-2007 standard.
TABLE 2 Performance test results for examples 5-8 and comparative examples 1-4
As is apparent from comparison of examples 1 to 7 with comparative example 1, respectively, the use of the polyolefin resin can have lower moisture absorption, better flash and aging resistance, and lower dielectric constant and loss tangent than the use of the saturated resin; as can be seen from the comparison between example 7 and comparative example 3, the anti-blocking agent can effectively solve the problem of the occurrence of the adhesive reversion of the composite insulating material; as can be seen from the comparison between examples 6 and 8, the dielectric constant and the loss tangent of the composite insulating material are remarkably increased by increasing the usage ratio of the synergistic flame retardant antimony trioxide, and therefore, the ratio of the flame retardant decabromodiphenylethane to the synergistic flame retardant antimony trioxide is preferably controlled to be 5: 1; compared with the comparative example 2, the embodiment 6 shows that the dielectric constant and the loss factor of the composite insulating material can be effectively reduced by adding the polystyrene hollow microspheres into the hot melt adhesive; as is clear from comparison of example 7 with comparative example 4, the use of different antiblocking agents prevents the occurrence of the blocking of the composite insulation material, but the use of the polytetrafluoroethylene wax powder has a lower dielectric constant and loss tangent than the use of silica.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (5)
1. The composite insulating material of the polyolefin hot melt adhesive is characterized by comprising a PET layer, a shielding layer, a characteristic impedance adjusting layer and a polyolefin hot melt adhesive layer;
the polyolefin hot melt adhesive layer is formed by coating and solidifying a polyolefin hot melt adhesive, and the polyolefin hot melt adhesive is prepared from the following raw materials in parts by weight: 30-60 parts of polyolefin resin, 20-40 parts of flame retardant, 6-15 parts of synergistic flame retardant, 0.1-5 parts of anti-blocking agent, 0.1-10 parts of polystyrene hollow microspheres and 250 parts of toluene solvent 100-; the polyolefin resin is one or a combination of more of styrene-butadiene rubber, hydrogenated styrene-butadiene rubber, SBS rubber, SEBS rubber, SIS rubber or SEPS rubber; the anti-blocking agent is one or a combination of a plurality of polyethylene wax powder, polypropylene wax powder or polytetrafluoroethylene wax powder; the particle size of the polystyrene hollow microsphere is 1-60 mu m;
the characteristic impedance adjusting layer covers the polyolefin hot melt adhesive layer, the shielding layer covers the characteristic impedance adjusting layer, and the PET layer covers the shielding layer.
2. The composite insulation of claim 1, wherein said shield layer is one of a stainless steel foil or a nickel foil.
3. The composite insulation material of claim 1, wherein the characteristic impedance adjusting layer is one or more of PP, PE or PS in combination, and the dielectric constant of the characteristic impedance adjusting layer is 2.0-2.8.
4. The manufacturing method of the composite insulating material is characterized by comprising the following steps of:
the preparation method of the polyolefin hot melt adhesive comprises the following steps:
step A: respectively adding 30-60 parts of polyolefin resin and 250 parts of toluene 100-;
and B: adding 0.1-5 parts of anti-blocking agent, 20-40 parts of flame retardant and 6-15 parts of synergistic flame retardant into the reaction kettle, and adjusting the stirring speed to be 1000-3000r/min until the fineness is less than 10 mu m;
and C: adding 0.1-10 parts of polystyrene hollow microspheres before coating, and uniformly stirring to obtain a polyolefin hot melt adhesive;
a shielding layer manufacturing step: compounding the PET layer and the shielding layer on the lower surface of the PET layer in a dry compounding manner;
the characteristic impedance adjusting layer manufacturing step: compounding a characteristic impedance adjusting layer on the lower surface of the shielding layer in a dry compounding mode, wherein the dielectric constant of the characteristic impedance adjusting layer is 2.0-2.8;
the manufacturing steps of the polyolefin hot melt adhesive layer are as follows: and coating one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer, or compounding one or more layers of polyolefin hot melt adhesives on the lower surface of the characteristic impedance adjusting layer in a hot melt extrusion compounding manner, and then drying in an environment of 100-150 ℃ to obtain the composite insulating material.
5. The method as claimed in claim 4, wherein the viscosity of the polyolefin hot melt adhesive in step B is 3000-12000 mPa-s.
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| CN112037984B (en) * | 2020-08-31 | 2022-05-24 | 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 |
| TWI824240B (en) * | 2021-04-16 | 2023-12-01 | 俊馳材料科技股份有限公司 | Hot melt tape and manufacturing and using method thereof |
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| CN1074469A (en) * | 1992-01-18 | 1993-07-21 | 沈阳工业学院 | 901 rapid strong glue and preparation method thereof |
| CN1239130A (en) * | 1998-06-11 | 1999-12-22 | 刘小朝 | Flame-retarding oily binder |
| CN1266874A (en) * | 1999-03-16 | 2000-09-20 | 孙明 | Ethylene-butadiene-styrene type flame-retarding fire-extinguishing universal adhesive without benzene toxin |
| JP4730505B2 (en) * | 2004-05-10 | 2011-07-20 | ジェイエスアール クレイトン エラストマー株式会社 | Adhesive composition |
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| US10072186B2 (en) * | 2015-07-31 | 2018-09-11 | Fina Technology, Inc. | Farnesene-based tackifying resins and adhesive compositions containing the same |
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