CN107118525A - A kind of fire-retardant ABS enhancing modified PBT compositions - Google Patents
A kind of fire-retardant ABS enhancing modified PBT compositions Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
- C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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Abstract
Strengthen modified PBT composition the invention discloses a kind of fire-retardant ABS, including：40 70 parts by weight PBT, 10 20 parts by weight ABS, 10 30 parts by weight of glass fiber, the triblock copolymer of 1 10 parts by weight poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate), 0.1 1 parts by weight antioxidant, 0.5 2 parts by weight coupling agents, 12 parts by weight lubricants, with 3 12 parts by weight composite flame-retardant agents, the product prepared using said composition has high glaze, and with impact strength, tensile strength and anti-flammability improved etc..The present invention also discloses the preparation method of above-mentioned composition.
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to a kind of fire-retardant ABS enhancing modified PBT compositions and
Its preparation method.
Background technology
Polybutylene terephthalate (PBT) is formed by terephthalic acid (TPA) and butanediol by polycondensation polymerized
Crystalline material.PBT is as wide variety of engineering plastics, and mechanical property, hydrolytic resistance with comprehensive stability are good, hygroscopicity
Low, chemicals-resistant, solvent, weatherability are good；Crystallization rate is fast, and good fluidity, mouldability is excellent, and dielectric strength is high, electric property
It is good；Coefficient of friction is low, abrasion performance；Bending creep is good；Fiberglass reinforced and flame retardant products are easily formed, post-processing is easy.But
The crystalline stability of PBT resin is poor, causes product size unstable, and it is more sensitive to breach so that PBT material
Notch impact strength is relatively low
Acrylonitrile-butadiene-styrene (ABS) (ABS) resin has higher impact strength, heat resistance and dimensional stability, comprehensive
Close function admirable, it is easy to process, due to the various advantages that it has, be widely used in industrial spare and accessory parts, electric equipment products
Shell and driving member, office equipment, and other fields.
PBT and ABS resin are subjected to alloying, PBT crystallinity and ABS amorphism feature can be made full use of, made
Material has excellent mouldability, dimensional stability and resistance to chemical reagents, particularly can carry PBT notch impact strength significantly
It is high.
Using fiber glass reinforced PBT, PBT tensile strength, bending strength, bending modulus, compression are improved in performance strong
Degree, wearability, reduction water imbibition, creep, heat distortion temperature and molding shrinkage.The weak point of fiber glass reinforced PBT is product
Easy its outward appearance of generation Warping Effect.
There is more excellent rigidity, hardness and mechanical property by the PBT/ABS alloys of glass fiber reinforcement, as one
The model engineering plastic of kind of excellent combination property, can be widely applied to automobile, the application field such as household electrical appliances.
The outward appearance, shock resistance, tensile property to the PBT/ABS alloy products of glass fiber reinforcement are still suffered from reality
Deng the demand further improved, while requiring that it has the fire resistance improved.
The content of the invention
It is an object of the invention to a kind of fire-retardant ABS enhancing modified PBT compositions and preparation method thereof, the combination is utilized
Product prepared by thing has high glaze, and with impact strength, tensile strength and fire resistance improved etc..
Technical scheme is as follows：
A kind of fire-retardant ABS enhancing modified PBT compositions, including：40-70 parts by weight PBT, 10-20 parts by weight ABS, 10-
30 parts by weight of glass fiber, the three block of 1-10 parts by weight poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate) is total to
Polymers, 0.1-1 parts by weight antioxidant, 0.5-2 parts by weight coupling agents, 1-2 parts by weight lubricants, and 3-12 parts by weight composite flame-proofs
Agent, described polybutylene terephthalate PBT relative densities are 1.3-1.60g/cm3, and fusing point is 220-230 DEG C, and melt glues
Spend for 0.6-0.8, can be using Products such as BASF, precious reason, South Asia；
Described ABS resin is made by the following method：
According to continuous bulk polymerization method and/or solution polymerization process with the series polymerizations device of three reactors is included, by benzene
Vinyl monomer and acrylonitrile monemer, rubber-like polymer butadiene/styrene copolymers, and tertiary dodecyl mercaptans and 1,1- are double
(tert-butyl peroxy base) -3,3,5- trimethyl-cyclohexanes first material feeding first reactor, so as in rubber-like polymer not
Phase inversion is the polymerization of progress monomer under conditions of dispersed phase；Second step, is inputted continuous in first reactor into second reactor
The polymeric solution of taking-up, and add styrene monomer and acrylonitrile monemer, rubber-like polymer butadiene/styrene copolymers,
And double (the tert-butyl peroxy bases) -3 of tertiary dodecyl mercaptans and 1,1-, the second material of 3,5- trimethyl-cyclohexanes polymerize, this
When, rubber-like polymer phase inversion is dispersed phase, forms rubber-like polymer particle；3rd step, continuously takes from second reactor
Go out polymeric solution, send into the 3rd reactor, polymerize in the 3rd reactor, further improve solid content, then will polymerization
Solution is granulated through volatile ingredient removal step and extrusion step, obtains ABS resin.
Wherein, the ratio between material is in the range of 50-150% (weight) used in the material and the first step that second step is added.Should
ABS resin kind, rubber-phase content is 12-20wt%, and rubber grain average grain diameter is 0.45-0.60 microns, melt flow (MFI)
For 1.2-2.0g/10min, while with impact energy, with high gloss.
Glass fibre uses high strength glass fiber, and instantiation is to have 910 or 995 chis from OwensCorning
Very little S- glass fibres, the T- glass fibres from Nittobo, the HiPertex from 3B, the R- glass from Vetrotex
Fiber and S-1 the and S-2- glass fibres from AGY.Glass fibre can be in the form of chopped fiber, preferably with 0.2mm extremely
The form of the staple glass of 20mm length, or in the form of continuous filament fiber；Its consumption is preferably 15-20 parts.
The triblock copolymer of poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate), using Arkema
Obtained trade name Nanostrength 123,250,012, E20, E40 product.
Antioxidant is antioxidant 1010 and 168 with 1:Mixture of 1 weight than formation.
Coupling agent is silane coupler, for example KH550, KH560.
Lubricant is calcium stearate and ethylene bis stearamide with 1:3-3:Mixture of 1 weight than formation；
Composite flame-retardant agent is bromide fire retardant and antimony oxide or the mixing fire retardant of antimony pentoxide formation, and both mix
The part by weight of conjunction is 1:1-3:1, bromide fire retardant can use decabromodiphenyl oxide, TDE, brominated epoxy resin, bromine
Change polystyrene etc., preferably decabromodiphenyl oxide and antimony oxide is with 2:The mixture of 1 part by weight formation.
There is provided above-mentioned fire-retardant ABS simultaneously strengthens the preparation method of modified PBT composition, including step：
a：PBT and ABS are weighed by weight ratio, is well mixed, and it is small that PBT is first dried to 2-5 at 120-150 DEG C before mixing
When, control water content is less than 0.05%；
b：Coupling agent and glass fibre are weighed by weight ratio, are well mixed；
c：The triblock copolymer of poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate) is weighed by weight ratio
Thing, lubricant, antioxidant and composite flame-retardant agent, are well mixed, then it is added at a high speed together with the material that a steps are mixed
Continue to mix until uniform in mixer；
d：The raw material that step c is mixed puts into the loading hopper of double screw extruder, in the special of double screw extruder
The glass fibre of silane coupler surface modification is added at glass fibre mouth, through melting extrusion, granulation is fully plastified, melted, again
Conjunction, again extruded, tie rod, cooling, pelletizing, drying and packaging；
Technological parameter is as follows：215-240 DEG C of one area of double screw extruder, 215-240 DEG C of 2nd area, 215-240 DEG C of 3rd area, four
215-240 DEG C of area, 215-240 DEG C of 5th area, 215-240 DEG C of 6th area, 215-240 DEG C of 7th area, 215-240 DEG C of 8th area；Screw rod revolution
Control is in 300-350rpm；2~10min of residence time.
The present invention ABS resin preparation in, using three series connection reactor polyplants come continuous bulk polymerization method and/
Or during solution polymerization process preparation, by causing that phase inversion is not dispersed phase to Butadiene/Styrene in large quantities in first reactor
Under the conditions of polymerize after, then in second reactor input first reactor product, and add include polymerisation
While the polymer materials such as styrene, acrylonitrile, rubber-like polymer, inert organic solvents used or afterwards, by rubber-like
Polymer phase inversion is dispersed phase, is further polymerize in the 3rd reactor again afterwards, improves solid content, can be made anti-
The ABS resin that impact and surface gloss are substantially improved.
In the present invention, the ABS resin with specific structure prepared by using above-mentioned ad hoc approach to mix with PBT,
So that product is while with high impact resistance, with high surface gloss, while using poly- (styrene)/poly- (fourth
Diene)/the triblock copolymer of poly- (methyl methacrylate) this compatilizer, effectively increase ABS resin and PBT trees
Compatibility between fat so that composition morphosis is more stablized, and improves shock resistance, the surface gloss of composition
Deng.And the glass fibre after silane coupler processing is utilized, to be strengthened, effectively increase the draftability of composition article
Energy.In existing product, the outward appearance of the PBT/ABS alloy products of glass fiber reinforcement is general less smooth, and glossiness is low, this
Invention is first with the ABS resin with specific structure so that product is while with high impact resistance, with high table
Face glossiness, and further using calcium stearate and ethylene bis stearamide with 1:3-3:1 weight is made than the mixture of formation
For lubricant so that composition article has smooth, the outward appearance of high glaze.The composite flame-retardant agent of addition is not substantially simultaneously
On the basis of influenceing composition various mechanical properties, outward appearance etc. so that composition has a good anti-flammability, its product it is fire-retardant
Performance enough reaches UL 94V-0 ranks.
The product prepared using the present composition, can be widely used for automobile, household electrical appliances, electric tool, electric part
Deng field, for example, prepare connector, socket, Meter Parts, automobile door handle, bumper, lampshade, valve, gear-box, air lattice
Grid, terminal plate, transformer, automobile door and window handle, ashtray, switch, hair drier part, vacuum cleaner.
Embodiment
Technical scheme is further detailed and described below by way of embodiment.
ABS resin Production Example
Adopt and prepare with the following method：
It is thoroughly mixed series polymerizations equipment that type reactor is connected in series to prepare ABS resin using 3.First stage by
First reactor is constituted, and second stage is made up of second reactor and the 3rd reactor.
It will be polymerize with plunger pump comprising 65.7 parts by weight of styrene, 21.4 parts by weight of acrylonitrile, 10.3 parts by weight of rubber shapes
Thing, the tertiary dodecyl mercaptans of 0.12 parts by weight and 0.028 parts by weight 1, double (the tert-butyl peroxy bases) -3 of 1-, 3,5- trimethyl-cyclohexanes
First material is continuously introduced into first reactor with 7.0 kgs/hour of speed, and monomer polymerize wherein.In the case, should
Regulation polymerization temperature makes solids content (rubber-like polymer and the styrene/propylene i.e. in polymeric solution that first reactor is exported
The amount of lonitrile copolymer) relative to polymeric solution weight be 22.1% (weight).Now, polymerization temperature is 83 DEG C.In addition, conduct
Rubber-like polymer, has used styrene/butadiene block copolymer, and its 5% (weight) styrene solution is in 25 DEG C of viscosity
For 11cP (trade name NIPOL：NS 310S, Nippon Zeon Co., Ltd manufacture).In first reactor, do not formed any
Rubber-like polymer particle.
Polymeric solution is continuously withdrawn from first reactor, second reactor is then continuously introduced into.Then will with plunger pump
Wrap 27 parts by weight of styrene, 9.3 parts by weight of acrylonitrile, 6.7 parts by weight of rubber shaped polymers, 68.7 parts by weight of ethylbenzene, 0.16 weight
Measure the tertiary dodecyl mercaptans of part and 0.03 parts by weight 1, double (the tert-butyl peroxy bases) -3 of 1-, the second polymer of 3,5- trimethyl-cyclohexanes
Material is continuously introduced into second reactor with 3.0 kgs/hour of speed.Herein, the rubber in first reactor and second reactor
The ratio between shaped polymer amount (Y/X) is 0.65.And the ratio between organic solvent addition in first reactor and second reactor (S/T)
For 0.0.In second reactor, the polymerization of monomer is carried out continuously, and adjusts polymerization temperature so that second reactor exit is solid
Body content is 37% (weight) relative to the amount of polymeric solution.At this moment, polymerization temperature is 100 DEG C.In second reactor, rubber
Shaped polymer phase inversion is dispersed phase, forms rubber-like polymer particle.Polymeric solution is continuously withdrawn from second reactor, is sent into
3rd reactor, polymerization is carried out in the 3rd reactor and is caused in the 3rd reactor exit solids content up to 50% (weight
Amount).Then polymeric solution is granulated through volatile ingredient removal step and extrusion step.
Using electron microscope by ultrathin sectioning by resinography, rubber grain average grain diameter is measured for 0.50 micron,
Gained resin is dried 3 hours in 90 DEG C, then in 240 DEG C of molding temperature and the lower injection of 40 DEG C of mould temperature to prepare sample,
And measure the sample and surface gloss of Izod impact strengths.
Izod impact strengths：Measured by JIS K-6871.Surface gloss：It is determined according to JIS Z-8741.
Izod impact strengths：27.1kgcm/cm, surface gloss：95.5%.
Embodiment
Fire-retardant ABS enhancing modified PBT particles are prepared by the following method：
a：PBT and ABS are weighed by weight ratio, is well mixed, first dries PBT 2 hours at 150 DEG C before mixing, are controlled
Water content is less than 0.05%；
b：Coupling agent and glass fibre are weighed by weight ratio, are well mixed；
c：The triblock copolymer of poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate) is weighed by weight ratio
Thing, lubricant, antioxidant and composite flame-retardant agent, are well mixed, then it is added at a high speed together with the material that a steps are mixed
Continue to mix in mixer until uniform, high-speed mixer rotating speed is 800 revs/min, incorporation time is 2-3 minutes；
d：The raw material that step c is mixed puts into the loading hopper of double screw extruder, in the special of double screw extruder
The glass fibre of silane coupler surface modification is added at glass fibre mouth, through melting extrusion, granulation is fully plastified, melted, again
Conjunction, again extruded, tie rod, cooling, pelletizing, drying and packaging；
Technological parameter is as follows：220 DEG C of one area of double screw extruder, 230 DEG C of 2nd area, 235 DEG C of 3rd area, 235 DEG C of 4th area, 5th area
240 DEG C, 235 DEG C of 6th area, 230 DEG C of 7th area, 230 DEG C of 8th area；Screw rod revolution is controlled in 300rpm；Residence time 6min.
Polybutylene terephthalate uses BASF AG's product, Ultradur B6550；ABS resin 1：Using above-mentioned
Product in ABS resin Production Example；ABS resin 2：Taiwan is very beautiful, PA-747R；Glass fibre is come from using high strength glass fiber
AGY S-1 glass fibres；The triblock copolymer of poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate), is used
Trade name Nanostrength 123 product made from Arkema；Poly- (methyl methacrylate)/poly- (acrylic acid fourth
Ester)/the triblock copolymer of poly- (methyl methacrylate) is A Kema) the Nanostrength M52N products of company；Antioxygen
Agent is antioxidant 1010 and 168 with 1:Mixture of 1 weight than formation；Coupling agent is silane coupler, KH550；Lubricant is
Calcium stearate is with ethylene bis stearamide with 1:Mixture of 1 weight than formation；Composite flame-retardant agent is decabromodiphenyl oxide and three
Two antimony are aoxidized with 2:The mixture of 1 part by weight formation.
Embodiment 1-5 and comparative example 1-6 each components weight consumption and properties of product are shown in Table 1.
Performance test：
Tensile property test is carried out by ISO 527-2, and specimen size is 150*10*4, and draw speed is 50mm/min；It is curved
Bent performance test is carried out by ISO 178, and specimen size is 80*10*4, and draw speed is 2mm/min, and span is 64mm, simply supported beam
Impact strength is carried out by ISO 179, and specimen size is 55*6*4, and notch depth is 1/3rd of sample thickness.Lustrous surface
Degree：It is determined according to JIS Z-8741.Fire resistance is according to the standard testings of UL 94.
Table 1
From the test result shown in table 1, prepared using the enhanced PBT composition of the ABS resin of specific structure
Product there is good shock resistance, tensile property and high surface gloss, and without using, using less or use
Product prepared by the enhanced PBT composition of other kinds of ABS resin, its shock resistance is relatively low, and surface gloss is also reduced；
Simultaneously in above-mentioned composition, if without using above-mentioned specific compatilizer poly- (styrene)/poly- (butadiene)/poly- (methyl-prop
E pioic acid methyl ester) triblock copolymer or use other kinds of compatilizer, its product erosion-resisting characteristics and surface gloss reduction,
Meanwhile, if without using lubricant, its surface gloss is equally also reduced.By using by decabromodiphenyl oxide and antimony oxide
With 2:The mixture of 1 part by weight formation is as composite flame-retardant agent, and the fire resistance of composition has reached UL 94V-0 ranks.
The foregoing is only a preferred embodiment of the present invention, therefore can not limit the scope that the present invention is implemented according to this, i.e.,
The equivalent changes and modifications made according to the scope of the claims of the present invention and description, all should still belong in the range of the present invention covers.
Claims (7)
1. a kind of fire-retardant ABS enhancing modified PBT compositions, it is characterised in that：Including following component：40-70 parts by weight PBT,
10-20 parts by weight ABS, 10-30 parts by weight of glass fiber, 1-10 parts by weight poly- (styrene)/poly- (butadiene)/poly- (methyl-prop
E pioic acid methyl ester) triblock copolymer, 0.1-1 parts by weight antioxidant, 0.5-2 parts by weight coupling agents, 1-2 parts by weight lubricants,
With 3-12 parts by weight composite flame-retardant agents；Wherein, antioxidant is antioxidant 1010 and 168 with 1:1 weight is than the mixture of formation, profit
Lubrication prescription is calcium stearate and ethylene bis stearamide with 1:3-3:Mixture of 1 weight than formation.
2. composition as claimed in claim 1, it is characterised in that：Described polybutylene terephthalate PBT relative densities
For 1.3-1.60g/cm3.
3. composition as claimed in claim 1, it is characterised in that：Described ABS resin is made by the following method：According to even
Continuous mass polymerization and/or solution polymerization process are with the series polymerizations device of three reactors is included, by styrene monomer and propylene
Nitrile monomer, rubber-like polymer butadiene/styrene copolymers, and tertiary dodecyl mercaptans and 1,1- double (tert-butyl peroxy bases)-
The first material feeding first reactors of 3,3,5- trimethyl-cyclohexanes, so as in the non-phase inversion of rubber-like polymer for dispersed phase
Under the conditions of carry out monomer polymerization；Second step, the polymeric solution being continuously withdrawn in first reactor is inputted into second reactor,
And add styrene monomer and acrylonitrile monemer, rubber-like polymer butadiene/styrene copolymers, and tertiary dodecyl mercaptans
With double (the tert-butyl peroxy bases) -3 of 1,1-, the second material of 3,5- trimethyl-cyclohexanes is polymerize, now, rubber-like polymer
Phase inversion is dispersed phase, forms rubber-like polymer particle；3rd step, is continuously withdrawn polymeric solution from second reactor, feeding
3rd reactor, is polymerize in the 3rd reactor, solid content is further improved, then by polymeric solution through volatile ingredient
Removal step and extrusion step are granulated, and obtain ABS resin；
Wherein, the ratio between material is in the range of 50-150% (weight) used in the material and the first step that second step is added.The ABS trees
Fat kind, rubber-phase content is 12-20wt%, and rubber grain average grain diameter is 0.45-0.60 microns, and melt flow (MFI) is
1.2-2.0g/10min, while with impact energy, with high gloss.
4. composition as claimed in claim 1, it is characterised in that：Glass fibre uses high strength glass fiber, instantiation
For the S- glass fibres with 910 or 995 sizes from OwensCorning, the T- glass fibres from Nittobo, come from
3B HiPertex, the R- glass fibres from Vetrotex and S-1 the and S-2- glass fibres from AGY.Glass fibre
Can be in the form of chopped fiber, preferably in the form of 0.2mm to 20mm length staple glass, or with the shape of continuous filament fiber
Formula；Its consumption is preferably 15-20 parts.
5. composition as claimed in claim 1, it is characterised in that：Coupling agent is silane coupler, for example KH550, KH560.
6. composition as claimed in claim 1, it is characterised in that：Composite flame-retardant agent be bromide fire retardant and antimony oxide or
The mixing fire retardant of antimony pentoxide formation, the part by weight that both mix is 1:1-3:1, bromide fire retardant can be using ten bromines connection
Phenylate, TDE, brominated epoxy resin, brominated Polystyrene etc., preferably decabromodiphenyl oxide and antimony oxide with
2:The mixture of 1 part by weight formation.
7. fire-retardant ABS as claimed in claim 1 strengthens the preparation method of modified PBT composition, including step：
a：PBT and ABS are weighed by weight ratio, is well mixed, first dries PBT 2-5 hours at 120-150 DEG C before mixing, are controlled
Water content processed is less than 0.05%；
b：Coupling agent and glass fibre are weighed by weight ratio, are well mixed；
c：Triblock copolymer, the profit of poly- (styrene)/poly- (butadiene)/poly- (methyl methacrylate) are weighed by weight ratio
Lubrication prescription, antioxidant and composite flame-retardant agent, are well mixed, then it is added into mixed at high speed together with the material that a steps are mixed
Continue to mix until uniform in machine；
d：The raw material that step c is mixed puts into the loading hopper of double screw extruder, in the special glass of double screw extruder
The glass fibre of silane coupler surface modification is added at fiber mouth, through melting extrusion, is granulated, fully plastify, melt, being combined,
Extruded again, tie rod, cooling, pelletizing, drying and packaging；
Technological parameter is as follows：215-240 DEG C of one area of double screw extruder, 215-240 DEG C of 2nd area, 215-240 DEG C of 3rd area, 4th area
215-240 DEG C, 215-240 DEG C of 5th area, 215-240 DEG C of 6th area, 215-240 DEG C of 7th area, 215-240 DEG C of 8th area；Screw rod revolution control
System is in 300-350rpm；2~10min of residence time.
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| CN110029407A (en) * | 2019-05-10 | 2019-07-19 | 江苏恒宇纺织集团有限公司 | A kind of porous PBT fiber DTY, which is washed, leads silk and preparation method thereof |
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