CN1569931A - Fiber reinforced thermolplastic plastic preparation method - Google Patents
Fiber reinforced thermolplastic plastic preparation method Download PDFInfo
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- CN1569931A CN1569931A CNA2004100269885A CN200410026988A CN1569931A CN 1569931 A CN1569931 A CN 1569931A CN A2004100269885 A CNA2004100269885 A CN A2004100269885A CN 200410026988 A CN200410026988 A CN 200410026988A CN 1569931 A CN1569931 A CN 1569931A
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- fibre reinforced
- thermoplasticity plastics
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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
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- Compositions Of Macromolecular Compounds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a fiber reinforced thermolplastic plastic preparation method, which is obtained by mixing thermoplastic resin, fortifying fiber and auxiliary substance with exhaust type single screw-spindle extrusion machine, and extruding them, the extrusion temperature being 190-350 deg. C, the screw-spindle rotate speed being 20-120 r/min.
Description
Technical field
The present invention relates to the plastics-production technology, is a kind of preparation method of tencel reinforced thermoplastics(RTP) concretely.
Background technology
An important development direction of plastic working is to improve use properties to existing modifying plastics.As utilize fortifying fibre to prepare the enhancement type modified plastics, can effectively improve the mechanical property and the resistance toheat of plastics, and meet or exceed the performance of metallic substance in some aspects.This type of material is referred to as fibre reinforced thermoplasticity plastics FRTP (fiber reinforcedthermoplastics).
The method of traditional mode of production FRTP has two kinds, and a kind of is to add inlet by the fiber in the middle part of the twin screw extruder to add the bunchy macrofiber.Another kind is chopped strand and raw material to be added together at feed opening by single screw extrusion machine.
Before a kind of advantage of working method be to use the fasciculation macrofiber, this fiber is low than the short fiber cost, just will grow in the use finely to send into the back and rely on worm drive that fiber is sneaked into by adding fine mouth, so operating process is easy.This method shortcoming is that facility investment is big, and because the space is little between intermeshing two screw rods, rotating speed is high, makes fiber overbreak under high speed shear, has influenced the intensity of product.Because raw material is not complete full state between screw rod, influence products appearance so the infiltration of fiber and material resin combination is not good.
The advantage of a kind of working method in back is that facility investment is few, and product appearance is good, and rerum natura keeps better.Shortcoming is: staple fibre must together be added by feed opening with raw material, but staple fibre often scatters and conglomeration because of mechanical force in spice process before this and during the feed opening charging, make by the gross raw material not use or normally blanking and influence production process at the feed opening place, must carry out than the more special surface treatment of macrofiber therefore making the price of staple fibre high by 50～100% to used staple fibre than macrofiber to prevent the group of rising in said process; They are two years old, because short fiber and raw material experience charging jointly, compress, extrude in three parts resin raw material by the solid-state thickness attitude that becomes, adding owing to fiber in this process makes the viscosity of compound increase obviously, make the melting process of material resin slack-off, cause and yield poorly, the energy consumption height of unit output, equipment attrition is big.When especially resin gradually melted under the effect of friction in the extruder screw compression section, high-intensity shearing can make part fibre breakage excessive, influences product strength.If modulus such as use carbon fiber are big, the specialty fibers of fingerprinting stress difference can make the decline of product performance more obvious in this course of processing.
Summary of the invention
The objective of the invention is to defective at the prior art existence, a kind of preparation method of fibre reinforced thermoplasticity plastics is provided, the product strength that can overcome prior art is poor, and the shortcoming that production cost is high reaches the effect that reduces facility investment and fibrous material cost.And product strength is improved.
The preparation method of fibre reinforced thermoplasticity plastics of the present invention is by thermoplastic resin, extrude finished product after fortifying fibre and the auxiliary agent process exhaust Mixing with Single Screw Extruder, the extrusion temperature of single screw extrusion machine is set in 190～350 ℃, 20～120 rev/mins of screw speeds, its raw material weight proportioning is as follows:
Thermoplastic resin: 50～90
Fortifying fibre: 10～40
Auxiliary agent: 1～20
Described thermoplastic resin is wherein one or more mixtures of polyethylene, polypropylene, acrylonitrile-butadiene-styrene (ABS), nylon, polyethylene terephthalate, poly terephthalic acid butyl alcohol ester, polyphenylene oxide, polycarbonate, polyoxymethylene, polyether-ether-ketone;
Described fortifying fibre is wherein one or more mixtures of glass fibre, carbon fiber, aramid fiber;
Described auxiliary agent is an auxiliary agent of giving certain performance of product, is fire retardant, static inhibitor, toughner, tinting material, oxidation inhibitor, one or more mixtures wherein;
Described fire retardant can be the compound system of halogenated flame retardant and antimony type oxide, as the compound system with antimonous oxide or antimony peroxide such as decabromodiphenyl oxide, octa-BDE, tetrabromo-bisphenol, brominated Polystyrene, bromination PC.
Described fire retardant can also be a phosphorus flame retardant, as the single or compound of red phosphorus, triphenyl phosphite, triisopropyl phosphoric acid ester etc.
Preferable preparation method of the present invention is to use staple fibre directly to be added by the venting port of exhaust single screw extrusion machine, or after directly falling into venting port after with the chopping of bunchy macrofiber above the venting port by the macrofiber stapling machine by single screw extrusion machine mixed finished product.
Preparation method of the present invention makes the energy consumption of unit output lower, and rerum natura is better than twin screw extruder elongated fibres and single screw extrusion machine are added short fiber by feed opening finished product rerum natura.
The used macrofiber bundle raw material of enhancing staple fibre that the inventive method is used or preparation staple fibre can add the process that the used enhancing staple fibre omission special surface of fine mode is handled by more traditional single screw rod, and production cost is descended.
Working process of the present invention is as follows, thermoplastic resin raw materials and auxiliary agent are mixed the feed opening place adding of back by single screw extrusion machine, under the effect of compound in frictional force after the rotation of screw rod, enter screw rod and push ahead, begin fusing after the acting in conjunction through mechanical force and electric heating, melted the thick liquid that becomes sticky during to forcing machine venting port position fully, to invent described staple fibre and quantitatively be added by venting port this moment, the mixed thing melt of staple fibre is extruded by forcing machine product place through dispersion with after mixing under the effect of mechanical force after bringing forcing machine into, makes the finished product pellet.
The present invention's advantage compared with prior art is; venting port by single screw rod vented extruder directly adds chopped strand; owing to this position material resin portion of closing fusing becomes thick melt; staple fibre can be wrapped up rapidly; again by behind the shear history owing to there is the protection of molten resin to make fiber be unlikely to overcrushing under shear action, the resulting product rerum natura is better.
In the machine barrel before the venting port that staple fibre adds material resin and some interpolation auxiliary agents, melting more traditional single screw rod adds fine mode and wants fast, and owing to there not being fiber to make that the melt-blended material viscosity of institute is low before the fusing, expecting later on that by venting port adding short fiber viscosity rises not quite, therefore make in the fusing whole process energy consumption more reasonable, total energy consumption is lower.
Owing to melted with short fiber institute blended material and to become visco-elasticity, can not make short fiber play group owing to the effect of last molten resin material in the process of the present invention, can reduce cost with the short fiber of handling through special adhesion.And because melting charge and fiber are extruded under pressure, good infiltration can be arranged, be significantly improved than the product appearance of twin screw extruder.
Embodiment
Embodiment 1: 70 kilograms of PBT resins are following dry 4 hours in 120 ℃ in loft drier, with itself and 9 kilograms of decabromodiphenyl oxides, 4 kilograms of antimonous oxides, 5 kilograms of toughner (grafting ethylene-propylene diene copolymer) mixing is placed in the exhaust single screw extrusion machine hopper, and forcing machine each several part temperature is as follows.
The middle part, rear portion is anterior
Temperature (℃) 190～220 220～250 220～250
Venting port by vented extruder behind the startup forcing machine evenly adds 38 kilograms of short glass fibers, after extruding through blend, by tank cooling back pelletizing.Pellet was tested by injector injection batten and by standard after under 120 ℃ dry 4 hours in loft drier.Screw speed is controlled at 20～30 rev/mins.
Reference examples 1A mixes the back by together extruding in the single screw extrusion machine hopper with 38 kilograms of short glass fibers with raw material, other is same as embodiment 1.
Reference examples 1 is that the compound among the embodiment 1 is poured in the hopper of twin screw extruder, after control screw speed and the feed rate 38 kilograms of long glass fibress is added inlet by fiber and introduces, and extrudes the back test.
The rerum natura contrast table of embodiment 1
Testing standard embodiment 1 embodiment 1A embodiment 1B
Tensile strength (MPa) ISO-527 142 135 138
Flexural strength (MPa) ISO-179 200 180 200
Shock strength (23 ℃) ISO-178 28 24 27
(KJ/m
2)
The sample appearance range estimation is better relatively poor
PBT: polybutylene terephthalate
Embodiment 2: with 15 kilograms of PBT resins, 35 kilograms of PC are following dry 4 hours in 120 ℃ in loft drier, with itself and 3 kilograms of decabromodiphenyl oxides, 3 kilograms of bromination PC, 3 kilograms of antimonous oxides, be placed in the exhaust single screw extrusion machine hopper 0.05 kilogram oxidation inhibitor mixes, forcing machine each several part temperature is as follows.
The middle part, rear portion is anterior
Temperature (℃) 200～220 220～250 220～350
Venting port by vented extruder behind the startup forcing machine evenly adds 10 kilograms of short glass fibers, after extruding through blend, by tank cooling back pelletizing.Pellet was tested by injector injection batten and by standard after under 120 ℃ dry 4 hours in loft drier.Screw speed is controlled at 100～120 rev/mins
Reference examples 2A mixes the back by together extruding in the single screw extrusion machine hopper with 10 kilograms of short glass fibers with raw material, other is same as embodiment 2.
Reference examples 2B pours the compound among the embodiment 2 in the hopper of twin screw extruder into, after control screw speed and the feed rate 10 kilograms of long glass fibress is added inlet by fiber and introduces, and extrudes the back test.
The rerum natura contrast table of embodiment 2
Testing standard embodiment 2 embodiment 2A embodiment 2B
Tensile strength (MPa) ISO-527 130 120 125
Flexural strength (MPa) ISO-179 180 170 180
Shock strength (23 ℃) ISO-178 25 22 24
(KJ/m
2)
The sample appearance range estimation is better relatively poor
PBT: polybutylene terephthalate PC: polycarbonate
Embodiment 3: with 90 kilograms of PA6 resins, in loft drier in 120 ℃ dry 4 hours down, with itself and 10 kilograms of brominated Polystyrenes, 5 kilograms of antimonous oxides, be placed in the exhaust single screw extrusion machine hopper 0.1 kilogram oxidation inhibitor mixes, forcing machine each several part temperature is as follows.
The middle part, rear portion is anterior
Temperature (℃) 200～220 220～250 220～250
Venting port by vented extruder behind the startup forcing machine evenly adds 25 kilograms of chopped carbon fibers, after extruding through blend, by tank cooling back pelletizing.Pellet was tested by injector injection batten and by standard after under 120 ℃ dry 4 hours in loft drier.Screw speed is controlled at 90～100 rev/mins.
Reference examples 3A mixes the back by together extruding in the single screw extrusion machine hopper with 25 kilograms of chopped carbon fibers with raw material, other is same as embodiment 3.
Reference examples 3B pours the compound among the embodiment 3 in the hopper of twin screw extruder into, after control screw speed and the feed rate 25 kilograms long bundle carbon fibers is added inlet by fiber and introduces, and extrudes the back test.
The rerum natura contrast table of embodiment 3
Testing standard embodiment 3 embodiment 3A embodiment 3B
Tensile strength (MPa) ISO-527 165 140 160
Flexural strength (MPa) ISO-179 250 180 240
Shock strength (23 ℃) ISO-178 40 30 35
(KJ/m
2)
The sample appearance range estimation is better relatively poor
PA6: nylon 6 (polycaprolactam)
Embodiment 4: with 90 kilograms of PA66 resins, in loft drier in 120 ℃ dry 4 hours down, it is mixed being placed in the exhaust single screw extrusion machine hopper with 0.1 kilogram of oxidation inhibitor, forcing machine each several part temperature is as follows.
The middle part, rear portion is anterior
Temperature (℃) 220～240 240～280 250～270
By the venting port of vented extruder 25 kilograms of weak points are cut aramid fiber behind the startup forcing machine and evenly add, after extruding through blend, by tank cooling back pelletizing.Pellet was tested by injector injection batten and by standard after under 120 ℃ dry 4 hours in loft drier.Screw speed is controlled at 90～100 rev/mins.
Reference examples 4A cuts aramid fiber with 25 kilograms of weak points to mix the back with raw material by together extruding in the single screw extrusion machine hopper, and other is same as embodiment 4.
Reference examples 4B pours the compound among the embodiment 3 in the hopper of twin screw extruder into, after control screw speed and the feed rate 25 kilograms long bundle aramid fibers is added inlet by fiber and introduces, and extrudes the back test.
The rerum natura contrast table of embodiment 4
Testing standard embodiment 4 embodiment 4A embodiment 4B
Tensile strength (Mpa) ISO-527 128 120 125
Flexural strength (Mpa) ISO-179 200 190 190
Shock strength (23 ℃) ISO-178 45 42 42
(KJ/m
2)
The sample appearance range estimation better
PA66; Nylon 66 (PA 66)
Embodiment 5: with 70 kilograms of POM resins, in loft drier in 120 ℃ dry 4 hours down, it is mixed being placed in the exhaust single screw extrusion machine hopper with 0.1 kilogram of oxidation inhibitor, forcing machine each several part temperature is as follows.
The middle part, rear portion is anterior
Temperature (℃) 200～220 220～250 220～240
Venting port by vented extruder behind the startup forcing machine evenly adds 10 kilograms of chopped carbon fibers and 10 kilograms of short glass fibers, after extruding through blend, by tank cooling back pelletizing.Pellet was tested by injector injection batten and by standard after under 120 ℃ dry 4 hours in loft drier.Screw speed is controlled at 90～100 rev/mins.
Reference examples 5A mixes the back by together extruding in the single screw extrusion machine hopper with 10 kilograms of chopped carbon fibers and 10 kilograms of short glass fibers with raw material, other is same as embodiment 5.
Reference examples 5B pours the compound among the embodiment 5 in the hopper of twin screw extruder into, after control screw speed and the feed rate 10 kilograms long bundle carbon fibers and 10 kilograms long bundle glass fibre is added the inlet introducing by fiber, extrudes the back test.
The rerum natura contrast table of embodiment 5
Testing standard embodiment 5 embodiment 5A embodiment 5B
Tensile strength (MPa) ISO-527 115 100 105
Flexural strength (MPa) ISO-179 35 28 33
Shock strength (23 ℃) ISO-178 200 170 200
(KJ/m
2)
The sample appearance range estimation is better relatively poor
POM: polyoxymethylene
Claims (9)
1, a kind of preparation method of fibre reinforced thermoplasticity plastics, it is characterized in that it being by thermoplastic resin, extrude after fortifying fibre and the auxiliary agent process exhaust Mixing with Single Screw Extruder and obtain, the extrusion temperature of single screw extrusion machine is set in 190～350 ℃, 20～120 rev/mins of screw speeds, its raw material weight proportioning is as follows:
Thermoplastic resin 50～90
Fortifying fibre 10～40
Auxiliary agent 1～20
Described thermoplastic resin is wherein one or more mixtures of polyethylene, polypropylene, acrylonitrile-butadiene-styrene (ABS), nylon, polyethylene terephthalate, poly terephthalic acid butyl alcohol ester, polyphenylene oxide, polycarbonate, polyoxymethylene, polyether-ether-ketone;
Described fortifying fibre is wherein one or more mixtures of glass fibre, carbon fiber, aramid fiber;
Described auxiliary agent is an auxiliary agent of giving certain performance of product, is fire retardant, static inhibitor, toughner, tinting material, oxidation inhibitor, one or more mixtures wherein.
2, the preparation method of fibre reinforced thermoplasticity plastics according to claim 1 is characterized in that described fire retardant is the compound system of halogenated flame retardant and antimony type oxide.
3, the preparation method of fibre reinforced thermoplasticity plastics according to claim 2 is characterized in that described halogenated flame retardant is wherein one or more mixtures of decabromodiphenyl oxide, octa-BDE, tetrabromo-bisphenol, brominated Polystyrene, bromination PC.
4, the preparation method of fibre reinforced thermoplasticity plastics according to claim 2 is characterized in that described antimony type oxide is antimonous oxide or antimony peroxide.
5, the preparation method of fibre reinforced thermoplasticity plastics according to claim 1 is characterized in that described fire retardant is a phosphorus flame retardant.
6, the preparation method of fibre reinforced thermoplasticity plastics according to claim 5 is characterized in that described phosphorus flame retardant is one or more mixtures in red phosphorus, triphenyl phosphite, the triisopropyl phosphoric acid ester.
7, the preparation method of fibre reinforced thermoplasticity plastics according to claim 1, it is characterized in that using staple fibre directly to add, or get by single screw extrusion machine is mixed after after directly the bunchy macrofiber being shredded above the venting port, falling into venting port by the macrofiber stapling machine by the venting port of exhaust single screw extrusion machine.
8, according to the preparation method of claim 1 or 7 described fibre reinforced thermoplasticity plastics, it is characterized in that the forcing machine rear part temperature is 190-220 ℃, the middle part temperature is 220-250 ℃, anterior temperature is 220-350 ℃.
9, the preparation method of fibre reinforced thermoplasticity plastics according to claim 7 is characterized in that the forcing machine rear part temperature is 200-220 ℃, and the middle part temperature is 220-250 ℃, and anterior temperature is 220-250 ℃.
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| CNB2004100269885A CN1260276C (en) | 2004-04-26 | 2004-04-26 | Fiber reinforced thermolplastic plastic preparation method |
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|---|---|---|---|
| CNB2004100269885A CN1260276C (en) | 2004-04-26 | 2004-04-26 | Fiber reinforced thermolplastic plastic preparation method |
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| CN1569931A true CN1569931A (en) | 2005-01-26 |
| CN1260276C CN1260276C (en) | 2006-06-21 |
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-
2004
- 2004-04-26 CN CNB2004100269885A patent/CN1260276C/en not_active Expired - Fee Related
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