CN109897347A - A kind of military project electric connector insulator and preparation method thereof - Google Patents
A kind of military project electric connector insulator and preparation method thereof Download PDFInfo
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- CN109897347A CN109897347A CN201910155517.0A CN201910155517A CN109897347A CN 109897347 A CN109897347 A CN 109897347A CN 201910155517 A CN201910155517 A CN 201910155517A CN 109897347 A CN109897347 A CN 109897347A
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Abstract
The present invention relates to technical field of electric connectors, and in particular to a kind of military project electric connector insulator and preparation method thereof.Motor mount insulation body material, is made of: 90-110 parts of PBT, 10-20 parts of phenolic resin, 10-15 parts of polytetrafluoroethylene (PTFE), 6-12 parts of hollow glass micropearl, 15-20 parts of alkali-free glass fibre, 9-14 parts of composite toughing agent, 15-20 parts of composite flame-retardant agent, 2-6 parts of compatilizer, 1-2 parts of lubricant, 2-4 parts of silane coupling agent, 2-3 parts of antioxidant, 5-10 parts of inorganic filler the raw material of following parts by weight.Military project electric connector insulator obtained through the invention, mechanical performance is excellent, abrasion resistance, heat resistance and good flame resistance, and with excellent safety and reliability, dimensional accuracy is high, long service life.The preparation method of military project electric connector insulator of the invention is simple and efficient, and operating process is easily-controllable, is conducive to industrialized production, stable product quality.
Description
Technical field
The present invention relates to technical field of electric connectors, and in particular to a kind of military project electric connector insulator and its preparation side
Method.
Background technique
Currently, military project electric connector is widely used in the fields such as aerospace, ship, detecting devices, mainly by
Shell, plug-in needle, grommet and the insulator composition equipped with spliced eye.With advances in technology with society development, to army
The requirement of work electric connector is also higher and higher.Important component of the insulator as military project electric connector, service performance with
The comprehensive performance of electric connector is closely bound up.However, existing military project electric connector insulator be commonly present buckling deformation, shrink mark,
The defects of shorting, and its heat resistance, wearability and mechanical performance need to be further increased, and influence its reliability and service life.
Therefore, it produces that mechanical performance is superior, there is excellent abrasion resistance, heat resistance and good flame resistance, product size army with high accuracy
Work electric connector insulator has a very important significance to improving its security reliability and prolonging its service life.
Summary of the invention
The purpose of the present invention is being directed to above-mentioned deficiency in the prior art, excellent a kind of mechanical performance, wearability, resistance to is provided
Hot and good flame resistance military project electric connector insulator, with excellent safety and reliability, dimensional accuracy is high, uses
Service life is long.
It is a further object of the present invention to provide the preparation method of military project electric connector insulator, this method is simple and efficient, behaviour
It is easily-controllable to make process, is conducive to industrialized production, stable product quality obtained.
The purpose of the present invention is achieved through the following technical solutions:
A kind of military project electric connector insulator, the military project electric connector insulator are made of insulation body material, the insulation
The component of the following parts by weight of body material: 90-110 parts of PBT, 10-20 parts of phenolic resin, 10-15 parts of polytetrafluoroethylene (PTFE), hollow
6-12 parts of glass microballoon, 15-20 parts of alkali-free glass fibre, 9-14 parts of composite toughing agent, 15-20 parts of composite flame-retardant agent, compatilizer
2-6 parts, 1-2 parts of lubricant, 2-4 parts of silane coupling agent, 2-3 parts of antioxidant, 5-10 parts of inorganic filler.
Further, the melt index of the PBT is 20-25g/10min, fusing point is 220-230 DEG C.(measuring temperature 250
DEG C, quality 2.16kg).The melt index of PBT influences the overall performance of insulation body material, then processes when melt index is excessively high
Property it is too weak, being easy to cause between each raw material cannot be sufficiently mixed, and improve production cost and influence product quality；Melt index is too low
When, then reduce the mechanical performance of PBT.And fusing point equally will affect the processing temperature of each raw material, it is equal when too high or too low for temperature
The compatibility for easily leading to each raw material is bad, so that the various performance parameters of product be made to decline.Further, the characteristic of the PBT
Viscosity is 0.85-1.20dlg-1, and content of carboxyl end group is 20-30mol/t in the PBT.
PBT of the present invention and other components have good compatibility, and each feed distribution of insulation body material made is more
Be it is uniform, improve insulation body material mechanical performance and processing performance；By adding phenolic resin and polytetrafluoroethylene (PTFE), into
One step imparts excellent mechanical performance, heat resistance and the wearability of insulation body material, meanwhile, it is micro- by the way that hollow glass is added
Pearl, reduces density, electrical conductivity and the water imbibition of insulation body material, and reinforced insulation body material its mechanical performance.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:(1-1.5 in mass ratio): (1:-1.5) is mixed；Wherein, described hyperbranched
The epoxy group number of epoxy resin is 10-32, number-average molecular weight 4000-8000.Hyperbranched epoxy resin has good resistance to
It is hot, the processing performance of guarantee system, and the compatibility with PBT can be improved, to increase toughness；By to epoxy group number
Selection, can preferably improve compatibility, the control toughening crosslink density of hyperbranched resin and PBT and other raw materials；Super
In the range of number-average molecular weight of branch epoxy resins, flow processability, compatibility and heat resistance are taken into account.The present invention is by strictly controlling
Type, compounding and the weight proportion of toughener processed can reduce the active force of molecule interchain between insulation body material each component, and
The processing fluidity of insulation body material is improved, and there is synergistic effect by the way that three will be compounded, substantially increases toughening effect
Fruit.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:(1-1.5): (0.8-1.2) is mixed.Composite flame-retardant agent of the invention is halogen-free flame retardants, good flame retardation effect, with PBT phase
Capacitive is good, will not be precipitated in use, is easy to add, and keeps the appearance of product material, mechanical performance more excellent.And pass through
It is matched with phenolic resin, charring rate can be improved, to further improve flame retardant effect and mechanical performance.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker that diameter is 600-900nm, draw ratio is 30-60.Institute
Stating magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, and the additive amount of titanate coupling agent is that magnesium sulfate is brilliant
The 3-6% of palpus weight.Magnesium sulfate crystal whisker has preferable flame retardant property, and has both feature nontoxic, that smoke amount is small.The present invention
When being used as flame retardant synergist and reinforcing material by adding magnesium sulfate crystal whisker, there is insulation body material not only preferably
Appearance, excellent rigidity, anti-impact force, high bending modulus, and have extremely low cubical contraction, good accurate size
Degree and heat resistance.To improve whisker agglomeration phenomenon, it need to be surface-treated, reduce its apparent activation energy.The present invention passes through addition
Coupling agent titanate esters can improve the mechanical property and hot property of material well.
Further, the lubricant is polyethylene wax, stearic acid, zinc stearate, N, the bis- ethylene hard fatty acids amides of N '-
At least one of with erucyl amide.By adding above-mentioned lubricant, it is able to achieve insulation each raw material of body material and preferably melts
It closes, obtained each feed distribution of insulation body material is more uniform, improves the mechanical performance and thermostability of insulation body material
Property.
Further, the inorganic filler is at least one of silica, titanium dioxide, calcium carbonate, talcum powder, nothing
The partial size of machine filler is 50-100nm.The chemical property of silica is more stable, does not react with water, is acidic oxide, no
The acid reaction with, can increase the wearability and weatherability of insulation body material.Talcum powder can increase the stabilization of shape of product, increase
Add tensile strength, shear strength, flexural strength, the intensity of pressure reduces deformation, strong etc. with whiteness height, epigranular dispersibility
Feature.Calcium carbonate is good with PBT affinity, can effectively increase or adjust material stiffness, toughness and bending strength etc., and can improve
The rheological property of plastic processing system reduces plasticization temperature, improves product size and stablizes, heat resistance and surface smooth finish.This hair
It is bright by strict control Nano titanium dioxide particle size, make its insulation body material in be uniformly dispersed, prevent nanoscale
The agglomeration of titanium dioxide granule improves the mechanical performance and resistance to UV aging energy of insulation body material.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:(1-2 in mass ratio) it mixes.Styrene-acrylonitrile-glycidyl methacrylate
The epoxy group of terpolymer can be reacted with the carboxyl end group of PBT, to play compatibilization；Ethylene butyl acrylate simultaneously
Copolymer polarity is high and PBT, phenolic resin and other polymer compatibilities are good, and with styrene-acrylonitrile-methacrylic acid
Ethylene oxidic ester terpolymer matches, and improves the cohesive force of composite flame-retardant agent and PBT, phenolic resin, and simultaneously to insulation
Body material system has toughening effect.
Further, the insulation body material preparation method the following steps are included: in proportion will except glass fibre and
Remaining raw material outside hollow glass micropearl is mixed, and mixed raw material is added in extruder from main spout, glass
Fiber and hollow glass micropearl are added in extruder from side spout, by the product squeezed out from extruder carry out it is cooling, dry,
Pelletizing obtains granular insulation body material.
Further, each area's temperature of the extruder is respectively as follows: one Qu Wendu: 180-200 DEG C, two area's temperature: 230-
250 DEG C, three Qu Wendu: 240-260 DEG C, four Qu Wendu: 250-270 DEG C, five Qu Wendu: 180-200 DEG C, six Qu Wendu: 190-
210 DEG C, seven area's temperature: 200-220 DEG C, eight area's temperature: 230-250 DEG C, nine Qu Wendu: 230-250 DEG C, revolving speed: 350-450
Rev/min, the side spout is set between 5th area and 6th area.Glass fibre and hollow glass micropearl select suitable opportunity to add
Enter, improve glass fibre and hollow glass micropearl and the adhesion strength of PBT, improve impact strength, prevent glass fibre because
The time is added too early and is easy to be extruded machine and shears too broken, humidification is caused to reduce；And cause to mix when preventing from being added too late
Unevenness is closed, its reinforcing effect to insulation body material entirety is influenced.
Another object of the present invention is achieved through the following technical solutions:
The preparation method of above-mentioned military project electric connector insulator, comprising the following steps:
(1) granular insulation body material is taken, granular insulation body material is placed in after being preheated, being melted and modeling is made
Expect melt；
(2) plastic melt is injected in mold, plastics first product is made after pressure maintaining, cooling and shaping, demoulding；
(3) the plastics first product after demoulding is modified, the military project electric connector insulator is made.
Further, in the step (1), the temperature of plastic melt is 250-270 DEG C.
Further, in the step (2), injection time 2-3s, mold temperature is 70-85 DEG C, dwell pressure 70-
90MPa, dwell time 20-30s.
The present invention is by forming insulator with material injection, and its step of strict control and performance parameter, makes that army is made
Work electric connector insulator stable product quality, for cubical contraction less than 10%, dimensional accuracy is high.Beneficial effects of the present invention:
Insulation body material of the invention is by by PBT, phenolic resin and polyethylene, middle addition glass fibre and other auxiliary agents, each group
Divide and realize good cooperation, mutual help, assigns；Military project electric connector insulator obtained, mechanical performance are excellent through the invention
Different, abrasion resistance, heat resistance and good flame resistance, with excellent safety and reliability, dimensional accuracy height, long service life.
The preparation method of military project electric connector insulator of the invention is simple and efficient, and operating process is easily-controllable, is conducive to industrialization
Production, product surface obtained be less prone to buckling deformation, shrink mark, short, crazing, overlap the defects of, stable product quality, tool
There are excellent safety and reliability, dimensional accuracy height, long service life.
Specific embodiment
The invention will be further described with the following Examples.
Embodiment 1
In the present embodiment, a kind of military project electric connector insulator, the military project electric connector insulator is by insulation body material system
At the component of the insulation following parts by weight of body material: 100 parts of PBT, 15 parts of phenolic resin, 12 parts of polytetrafluoroethylene (PTFE), sky
8 parts of heart glass microballoon, 17 parts of alkali-free glass fibre, 12 parts of composite toughing agent, 18 parts of composite flame-retardant agent, 4 parts of compatilizer, lubricant
1.5 parts, 3 parts of silane coupling agent, 2.5 parts of antioxidant, 7 parts of inorganic filler.
Further, the PBT is the PBT that melt index is 23g/10min, fusing point is 228 DEG C.The characteristic of the PBT
Viscosity is 1.10dlg-1, and content of carboxyl end group is 27mol/t in the PBT.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:1.2:1.2 in mass ratio is mixed；Wherein, the hyperbranched epoxy resin
Epoxy group number is 10-32, number-average molecular weight 4000-8000.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:1.2:1.2 mixing.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, titanate esters coupling
The additive amount of agent is the 4% of magnesium sulfate crystal whisker weight；The magnesium sulfate crystal whisker is the magnesium sulfate that diameter is 700nm, draw ratio is 40
Whisker.
Further, the lubricant is that polyethylene wax and the stearic acid ratio of 1:1 in mass ratio mix.
Further, the inorganic filler is that titanium dioxide and the calcium carbonate ratio of 1:2 in mass ratio mix, inorganic
The partial size of filler is 50-100nm.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:1 in mass ratio is mixed.
Further, the insulation body material preparation method the following steps are included: in proportion will except glass fibre and
Remaining raw material outside hollow glass micropearl is mixed, and mixed raw material is added in extruder from main spout, glass
Fiber and hollow glass micropearl are added in extruder from side spout, by the product squeezed out from extruder carry out it is cooling, dry,
Pelletizing obtains granular insulation body material.
Further, each area's temperature of the extruder is respectively as follows: one Qu Wendu: 190 DEG C, two area's temperature: 240 DEG C, three
Area's temperature: 250 DEG C, four Qu Wendu: 260 DEG C, five Qu Wendu: 190 DEG C, six Qu Wendu: 200 DEG C, seven area's temperature: 210 DEG C, 8th area
Temperature: 240 DEG C, nine Qu Wendu: 240 DEG C, revolving speed: 400 revs/min, the side spout is set between 5th area and 6th area.It is described
Extruder is extruser.
The preparation method of above-mentioned military project electric connector insulator, comprising the following steps:
(1) granular insulation body material is taken, granular insulation body material is placed in after being preheated, being melted and modeling is made
Expect melt；
(2) plastic melt is injected in mold, plastics first product is made after pressure maintaining, cooling and shaping, demoulding；
(3) the plastics first product after demoulding is modified, the military project electric connector insulator is made.
Further, in the step (1), the temperature of plastic melt is 260 DEG C.
Further, in the step (2), injection time 2.5s, mold temperature is 75 DEG C, dwell pressure 80MPa,
Dwell time is 25s.
Embodiment 2
In the present embodiment, a kind of military project electric connector insulator, the military project electric connector insulator is by insulation body material system
At the component of the insulation following parts by weight of body material: 90 parts of PBT, 10 parts of phenolic resin, 10 parts of polytetrafluoroethylene (PTFE), hollow
6 parts of glass microballoon, 15 parts of alkali-free glass fibre, 9 parts of composite toughing agent, 15 parts of composite flame-retardant agent, 2 parts of compatilizer, lubricant 1
Part, 2 parts of silane coupling agent, 2 parts of antioxidant, 5 parts of inorganic filler.
Further, the PBT is the PBT that melt index is 21g/10min, fusing point is 223 DEG C.The characteristic of the PBT
Viscosity is 0.9dlg-1, and content of carboxyl end group is 24mol/t in the PBT.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:1:1 in mass ratio is mixed；Wherein, the ring of the hyperbranched epoxy resin
Oxygroup number is 10-32, number-average molecular weight 4000-8000.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:1:0.8 mixing.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, titanate esters coupling
The additive amount of agent is the 3% of magnesium sulfate crystal whisker weight；The magnesium sulfate crystal whisker be diameter be 600-900nm, draw ratio 30-60
Magnesium sulfate crystal whisker.
Further, the lubricant is zinc stearate, N, and the bis- ethylene hard fatty acids amides of N '-and erucyl amide press quality
Ratio than 1:1:1 mixes.
Further, the inorganic filler is titanium dioxide, and the partial size of the inorganic filler is 50-100nm.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:1 in mass ratio) it mixes.
Further, the insulation body material preparation method the following steps are included: in proportion will except glass fibre and
Remaining raw material outside hollow glass micropearl is mixed, and mixed raw material is added in extruder from main spout, glass
Fiber and hollow glass micropearl are added in extruder from side spout, by the product squeezed out from extruder carry out it is cooling, dry,
Pelletizing obtains granular insulation body material.
Further, each area's temperature of the extruder is respectively as follows: one Qu Wendu: 180 DEG C, two area's temperature: 230 DEG C, three
Area's temperature: 240 DEG C, four Qu Wendu: 250 DEG C, five Qu Wendu: 180 DEG C, six Qu Wendu: 190 DEG C, seven area's temperature: 200 DEG C, 8th area
Temperature: 230 DEG C, nine Qu Wendu: 230 DEG C, revolving speed: 350 revs/min, the side spout is set between 5th area and 6th area.It is described
Extruder is extruser.
The preparation method of above-mentioned military project electric connector insulator, comprising the following steps:
(1) granular insulation body material is taken, granular insulation body material is placed in after being preheated, being melted and modeling is made
Expect melt；
(2) plastic melt is injected in mold, plastics first product is made after pressure maintaining, cooling and shaping, demoulding；
(3) the plastics first product after demoulding is modified, the military project electric connector insulator is made.
Further, in the step (1), the temperature of plastic melt is 250-270 DEG C.
Further, in the step (2), injection time 2s, mold temperature is 70 DEG C, dwell pressure 70MPa, is protected
The pressure time is 30s.
Embodiment 3
In the present embodiment, a kind of military project electric connector insulator, the military project electric connector insulator is by insulation body material system
At the component of the insulation following parts by weight of body material: 110 parts of PBT, 20 parts of phenolic resin, 15 parts of polytetrafluoroethylene (PTFE), sky
12 parts of heart glass microballoon, 120 parts of alkali-free glass fibre, 14 parts of composite toughing agent, 20 parts of composite flame-retardant agent, 6 parts of compatilizer, lubrication
2 parts of agent, 4 parts of silane coupling agent, 3 parts of antioxidant, 10 parts of inorganic filler.
Further, the PBT is the PBT that melt index is 25g/10min, fusing point is 223 DEG C.The characteristic of the PBT
Viscosity is 1.20dlg-1, and content of carboxyl end group is 30mol/t in the PBT.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:1.5:1.5 in mass ratio is mixed；Wherein, the hyperbranched epoxy resin
Epoxy group number be 10-32, number-average molecular weight 4000-8000.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:1.5:0.8 mixing.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, titanate esters coupling
The additive amount of agent is the 6% of magnesium sulfate crystal whisker weight；The magnesium sulfate crystal whisker be diameter be 600-900nm, draw ratio 30-60
Magnesium sulfate crystal whisker.
Further, the lubricant is zinc stearate.
Further, the inorganic filler is that titanium dioxide and the talcum powder ratio of 1:1 in mass ratio mix, inorganic
The partial size of filler is 50-100nm.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:2 in mass ratio is mixed.
Further, the insulation body material preparation method the following steps are included: in proportion will except glass fibre and
Remaining raw material outside hollow glass micropearl is mixed, and mixed raw material is added in extruder from main spout, glass
Fiber and hollow glass micropearl are added in extruder from side spout, by the product squeezed out from extruder carry out it is cooling, dry,
Pelletizing obtains granular insulation body material.
Further, each area's temperature of the extruder is respectively as follows: one Qu Wendu: 200 DEG C, two area's temperature: 250 DEG C,
Three Qu Wendu: 260 DEG C, four Qu Wendu: 270 DEG C, five Qu Wendu: 200 DEG C, six Qu Wendu: 210 DEG C, seven area's temperature: 220
DEG C, eight area's temperature: 250 DEG C, nine Qu Wendu: 250 DEG C, revolving speed: 450 revs/min, the side spout is set to 5th area and six
Between area.The extruder is extruser.
The preparation method of above-mentioned military project electric connector insulator, comprising the following steps:
(1) granular insulation body material is taken, granular insulation body material is placed in after being preheated, being melted and modeling is made
Expect melt；
(2) plastic melt is injected in mold, plastics first product is made after pressure maintaining, cooling and shaping, demoulding；
(3) the plastics first product after demoulding is modified, the military project electric connector insulator is made.
Further, in the step (1), the temperature of plastic melt is 270 DEG C.
Further, in the step (2), injection time 3s, mold temperature is 85 DEG C, dwell pressure 90MPa, is protected
The pressure time is 20s.
Embodiment 4
In the present embodiment, a kind of military project electric connector insulator, the military project electric connector insulator is by insulation body material system
At the component of the insulation following parts by weight of body material: PBT100 parts, 12 parts of phenolic resin, 14 parts of polytetrafluoroethylene (PTFE), hollow
10 parts of glass microballoon, 16 parts of alkali-free glass fibre, 10 parts of composite toughing agent, 16 parts of composite flame-retardant agent, 3 parts of compatilizer, lubricant 1
Part, 3 parts of silane coupling agent, 2 parts of antioxidant, 6 parts of inorganic filler.
Further, the PBT is the PBT that melt index is 20g/10min, fusing point is 225 DEG C.The characteristic of the PBT
Viscosity is 0.85dlg-1, and content of carboxyl end group is 22mol/t in the PBT.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:1:1.2 in mass ratio) it mixes；Wherein, the hyperbranched epoxy resin
Epoxy group number be 10-32, number-average molecular weight 4000-8000.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:1.2:1 mixing.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, titanate esters coupling
The additive amount of agent is the 4% of magnesium sulfate crystal whisker weight；The magnesium sulfate crystal whisker be diameter be 600-900nm, draw ratio 30-60
Magnesium sulfate crystal whisker.
Further, the lubricant is that stearic acid and erucyl amide are mixed according to 1:1.5 in mass ratio.
Further, the inorganic filler is that silica and calcium carbonate are closed according to 1:2 in mass ratio., inorganic to fill out
The partial size of material is 50-100nm.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:(1-2 in mass ratio) it mixes.
The other content of the present embodiment is same as Example 1, and which is not described herein again.
Embodiment 5
In the present embodiment, a kind of military project electric connector insulator, the military project electric connector insulator is by insulation body material system
At the component of the insulation following parts by weight of body material: 105 urea formaldehyde 18 of PBT, polytetrafluoroethylene (PTFE) 13, hollow glass micropearl
9, alkali-free glass fibre 16,12 composite flame-retardant agent 18 of composite toughing agent, compatilizer 5, lubricant 2,3.5 oxygen agent 2 of silane coupling agent
Part, inorganic filler 6.
Further, the PBT is the PBT that melt index is 24/10min, fusing point is 230 DEG C.The characteristic of the PBT
Viscosity is 1.1dlg-1, and content of carboxyl end group is 24l/t in the PBT.
Further, the composite toughing agent is by hyperbranched epoxy resin, ethene-vinyl acetate copolyesters, metering system
Sour methyl esters-butadiene-styrene copolymer 2:1:1.5 in mass ratio is mixed；Wherein, the hyperbranched epoxy resin
Epoxy group number is 10-32, number-average molecular weight 4000-8000.
Further, the composite flame-retardant agent by magnesium sulfate crystal whisker, nanometer grade antimony trioxide and polyphenylene oxide in mass ratio
1:1:0.8) mix.
Further, the magnesium sulfate crystal whisker is the magnesium sulfate crystal whisker handled by titanate coupling agent, titanate esters coupling
The additive amount of agent is the 5 of magnesium sulfate crystal whisker weight；The magnesium sulfate crystal whisker be diameter be 600-900nm, draw ratio 30-60
Magnesium sulfate crystal whisker.
Further, the lubricant is zinc stearate, N, and the bis- ethylene hard fatty acids amides of N '-and erucyl amide press matter
Amount is mixed than 1:2:1.
Further, the inorganic filler be silica, titanium dioxide and calcium carbonate 2:1:2 in mass ratio mix and
At the partial size of inorganic filler is 50-100nm.
Further, the compatilizer is by styrene-acrylonitrile-glycidyl methacrylate terpolymer and second
Alkene butyl acrylate copolymer 1:(1-2 in mass ratio) it mixes.
The other content of the present embodiment is same as Example 1, and which is not described herein again.
The performance test results of 1-5 of the embodiment of the present invention are as shown in the table:
| Embodiment | 1 | 2 | 3 | 4 | 5 |
| Tensile strength/MPa | 130 | 127 | 142 | 125 | 136 |
| Elongation at break/% | 4.5 | 5.1 | 4.0 | 4.8 | 4.4 |
| Bending strength/MPa | 156 | 141 | 167 | 147 | 153 |
| Bending modulus/MPa | 8230 | 8140 | 8490 | 8380 | 8250 |
| IZOD notch impact strength/KJ/m2 | 13.9 | 13.2 | 14.3 | 14.9 | 14.6 |
| Coefficient of friction (dry grinding)) | 0.24 | 0.26 | 0.25 | 0.26 | 0.24 |
| Heat distortion temperature, 1.82MPa | 198 | 207 | 204 | 196 | 193 |
| Fire-retardant -1.6mm (vertical combustion) | V0 | V0 | V0 | V0 | V0 |
| Dielectric constant | 3.4 | 3.4 | 3.3 | 3.4 | 3.3 |
Wherein, as follows in the performance test standard of embodiment 1-5: notch impact strength presses ASTM D256/(GB/T1843) standard
It is tested；Tensile property is tested by ASTM D638/(GB/T1040) standard tested；ASTM is pressed in bending property test
D790/(GB/T9341) standard is tested；Coefficient of friction presses ASTM D1894 standard test；Heat distortion temperature presses GB/
T1634.1-2004 standard is tested；Flame retardant property is tested by UL-94/(GB/T2408) standard tested, dielectric constant
It is tested by IEC60250 standard.
Military project electric connector insulator obtained through the invention not only has excellent mechanical performance and processing performance,
And it is good, there is good anti-flammability, heat resistance and wearability, cubical contraction is less than 10%, and product size precision is high, product
Surface be less prone to buckling deformation, shrink mark, short, crazing, overlap the defects of, safety and reliability are good, long service life.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (10)
1. a kind of military project electric connector insulator, it is characterised in that: the military project electric connector insulator is by insulation body material
It is made, the component of the insulation following parts by weight of body material: 90-110 parts of PBT, 10-20 parts of phenolic resin, polytetrafluoroethylene (PTFE)
10-15 parts, 6-12 parts of hollow glass micropearl, 15-20 parts of alkali-free glass fibre, 9-14 parts of composite toughing agent, composite flame-retardant agent 15-
20 parts, 2-6 parts of compatilizer, 1-2 parts of lubricant, 2-4 parts of silane coupling agent, 2-3 parts of antioxidant, 5-10 parts of inorganic filler.
2. military project electric connector insulator according to claim 1, it is characterised in that: the melt index of the PBT is 20-
25g/10min, fusing point are 220-230 DEG C.
3. military project electric connector insulator according to claim 1, it is characterised in that: the composite toughing agent is by hyperbranched
Epoxy resin, ethene-vinyl acetate copolyesters, Methyl Methacrylate-Butadiene-Styrene Copolymer 2:(1- in mass ratio
1.5): (1:-1.5) is mixed；Wherein, the epoxy group number of the hyperbranched epoxy resin is 10-32, and number-average molecular weight is
4000-8000。
4. military project electric connector insulator according to claim 1, it is characterised in that: the composite flame-retardant agent is by magnesium sulfate
Whisker, nanometer grade antimony trioxide and polyphenylene oxide 1:(1-1.5 in mass ratio): (0.8-1.2) is mixed.
5. military project electric connector insulator according to claim 1, it is characterised in that: the lubricant be polyethylene wax,
Stearic acid, zinc stearate, N, at least one of the bis- ethylene hard fatty acids amides of N '-and erucyl amide.
6. military project electric connector insulator according to claim 1, it is characterised in that: the preparation of the insulation body material
Method will mix the following steps are included: in proportion mix remaining raw material in addition to glass fibre and hollow glass micropearl
Raw material afterwards is added in extruder from main spout, and glass fibre and hollow glass micropearl are added to extruder from side spout
In, the product squeezed out from extruder is subjected to cooling, dry, pelletizing, obtains granular insulation body material.
7. military project electric connector insulator according to claim 6, it is characterised in that: each area's temperature of the extruder point
Not are as follows: one Qu Wendu: 190-210 DEG C, two area's temperature: 220-240 DEG C, three Qu Wendu: 230-250 DEG C, four Qu Wendu: 240-
260 DEG C, five Qu Wendu: 190-210 DEG C, six Qu Wendu: 200-220 DEG C, seven area's temperature: 210-230 DEG C, eight area's temperature: 230-
250 DEG C, nine Qu Wendu: 240-260 DEG C, revolving speed: 300-400 revs/min, the side spout is located between 5th area and 6th area.
8. a kind of preparation method of military project electric connector insulator described in claim 1-7 any one, it is characterised in that: packet
Include following steps:
(1) granular insulation body material is taken, granular insulation body material is placed in after being preheated, being melted and modeling is made
Expect melt；
(2) plastic melt is injected in mold, plastics first product is made after pressure maintaining, cooling and shaping, demoulding；
(3) the plastics first product after demoulding is modified, the military project electric connector insulator is made.
9. the preparation method of military project electric connector insulator according to claim 8, it is characterised in that: the step (1)
In, the temperature of plastic melt is 250-270 DEG C.
10. the preparation method of military project electric connector insulator according to claim 8, it is characterised in that: the step (3)
In, injection time 2-3s, mold temperature is 70-85 DEG C, dwell pressure 70-90MPa, dwell time 20-30s.
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