CN105647172B - A kind of wear-resisting long basalt fibre enhancing PA6 composites and preparation method thereof - Google Patents
A kind of wear-resisting long basalt fibre enhancing PA6 composites and preparation method thereof Download PDFInfo
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- CN105647172B CN105647172B CN201610207608.0A CN201610207608A CN105647172B CN 105647172 B CN105647172 B CN 105647172B CN 201610207608 A CN201610207608 A CN 201610207608A CN 105647172 B CN105647172 B CN 105647172B
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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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
- B29B9/00—Making granules
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- C08K5/00—Use of organic ingredients
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- C08K7/00—Use of ingredients characterised by shape
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- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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Abstract
The invention belongs to field of polymer composite material, is specifically a kind of wear-resisting long basalt fibre enhancing PA6 composites and preparation method thereof.The composite is prepared by the raw material of following weight percents, 1 20wt% kollag, 10 40wt% long basalt fibre, 35 87wt% PA6 master batches and 2 5wt% processing aid, the processing aid is silane coupler or/and heat stabilizer.Compared with prior art, the beneficial effects of the invention are as follows:Wear-resisting long basalt fibre enhancing PA6 composites prepared by the present invention have more balanced bulk properties in mechanical property and the aspect of frictional behaviour two, and abrasive resistance is strong, and combination property is excellent, service life is grown, preparation method is simply efficient, is easy to industrialized production, has promotional value.
Description
Technical field
The invention belongs to field of polymer composite material, is specifically a kind of wear-resisting long basalt fibre enhancing PA6 composite woods
Material and preparation method thereof.
Background technology
Nylon (PA) is a kind of widely used engineering plastics, has high intensity, high-wearing feature, oil resistant, weak acid resistant, Zi Run
The performance advantage such as sliding, insulation and easy processing, but contain substantial amounts of polar amide groups on PA strands, cause PA water absorption rates high,
Product size stability is poor, and makes its mechanical property and wear resistance decrease.In addition, the intensity of nylon and rigidity can not show a candle to gold
Category, in some particular applications, such as mining machinery, transmission equipment, transmission parts, anti-wear performance wretched insufficiency greatly limit
The application of nylon composite materials is made.In order to lift the anti-wear performance of nylon composite materials, anti-wear agent, reinforcing fiber etc. need to be added
Filler is modified.Patent CN201510213124.2 is using reinforcing fiber, hydrophobic material, anti-wear agent, lubricant, ultraviolet light
Absorbent, antioxidant and compatilizer modification of nylon resin, obtain it is a kind of have high intensity, agent of low hygroscopicity, weather-proof, self-lubricating,
Wear-resisting nylon composite materials and preparation method thereof;Patent CN201310258531.6 is modified using Fanglun slurry cake in-situ polymerization and carried
Aramid fiber and PA6 interface adhesiveness are risen, improves the mechanical performance and anti-wear performance of composite;Patent
CN201510191484.7 is improved between reinforcement and PA6 using ethylene/vinyl alcohol copolymer activation cladding reinforcement surface
Compatibility, and by adding heat resistance, sliding resistant wear performance and the resistance to fretting wear of nano-aluminium oxide raising material
Can, and carbon black is added further to improve the wearability of material and uvioresistant performance.The reinforcing material of above-mentioned patent is conventional
Glass fibre, carbon fiber or aramid fiber, and exist more in the form of chopped fiber, it is impossible to the humidification of fiber is given full play to, this
The problems such as preparation method is cumbersome, material composition is complicated, cost performance is not high also be present outside.
Long-fiber-reinforced thermoplastics (LFRT) are a kind of tencel enhancing technologies quickly grown in recent years.
In LFRT preparation process, the damage of fiber, breaking degree are reduced to minimum.LFRT has than conventional staple enhancing thermoplasticity modeling
Material more excellent mechanical property and hot property, and long fibre is mutually wound, and forms a kind of fiber reinforcement, can be limited each to different
Property shrink, significantly reduce warpage, improve product size stability, mechanical property, friction and wear behavior etc..Basalt fibre be after
A kind of great competition that new development is got up after the high performance fibers such as carbon fiber, aramid fiber, superhigh molecular weight polyethylene fibers
The novel high-performance reinforcing fiber of power, it is in addition to high intensity and the characteristics of high-modulus, also with heat-resisting quantity is good, antioxygen
The good, radioresistance of the property changed, thermal acoustic insulation effect is good, filterability is good, compression strength and shear strength are high, is adapted under various environment and makes
With grade excellent properties.Basalt fibre is applied to nylon reinforcements, the performance advantage of basalt fibre can be given full play to, greatly
Width improves the combination properties such as the wear-resisting of nylon matrix, mechanics, is advantageous to expand the application of nylon composite materials.
Filling-modified kollag is another important way for being lifted polymer matrix composite friction and wear behavior.
Kollag can form stable lubricating film in friction process, advantageously reduce the coefficient of friction and wear rate of material.
As engineering plastics filler, there is the kollag of layer structure easily by the pressure between friction idol and motion, from polymerization
Abrasive particle is detached into thing top layer and pit that is small, and being filled in friction material surface is ground by wear down, CONTACT WITH FRICTION is played
Change acts on, and with the continuous accumulation of kollag, friction surface gradually forms discontinuous transfer membrane, intermembranous good contact
State can improve the inhomogeneities of surface temperature, effectively suppress high temperature wear.Therefore, kollag is used as long basalt
Fiber reinforcement PA6 composite fillers, can further improve the tribological property of PA6 composites.
The present invention provides a kind of wear-resisting long basalt fibre enhancing PA6 composites and preparation method thereof.The present invention's is profound
Military rock fiber/PA6 composites have concurrently excellent wear-resisting while the excellent mechanical performances of long basalt fibre enhancing are taken into account
Performance;The preparation method of the present invention is simple, and fiber impregnation is abundant, easy continuous production, has good industrial applications prospect.
The content of the invention
The present invention is in order to overcome the performance deficiency of PA6 composites and deficiency, there is provided a kind of wear-resisting long basalt fibre
Strengthen PA6 composites and preparation method thereof.
The present invention is achieved by the following technical solutions:A kind of wear-resisting long basalt fibre enhancing PA6 composites, by
The raw material of following weight percents is prepared, 1-20wt% kollag, 10-40wt% long basalt fibre, 35-
87wt% PA6 master batches and 2-5wt% processing aid, the processing aid are silane coupler or/and heat stabilizer.
Preferably, the kollag is polytetrafluoroethylene (PTFE), molybdenum disulfide, graphite, paraffin or graphene.
For further description technical scheme, the invention provides a kind of wear-resisting long basalt fibre to increase
The preparation method of strong PA6 composites, it uses above-mentioned raw materials, and the preparation technology is:By long basalt fibre from support
Long fibre volume in draw and deploy, be incorporated on the dip roll in temperature control impregnation mold, extrude by deflector roll and spacing deflector roll
Machine squeezes into PA6 master batches, kollag and processing aid in temperature control impregnation mold, regulates and controls the temperature in temperature control impregnation mold
And the speed of carry-over pinch rolls, the pressure that the fibre bundle after dipping is entered in bosh by the guide roller of bosh porch
Cooled down on roller, through being granulated, dried, then obtain wear-resisting long basalt fibre enhancing PA6 composites.
When it is implemented, the temperature in the temperature control impregnation mold is 225~250 DEG C, the pulling speed of basalt fibre
For 5~35mm/s.Preferable temperature and speed can ensure PA6 master batches, kollag and processing aid in the molten state
It is sufficiently mixed, and make it that fiber and dipping material dipping are uniform.
In order that dipping material is abundant, uniformly impregnates fiber, the installation direction and fibre bundle of preferable each dip roll
Moving direction it is perpendicular, between adjacent dip roll in top-bottom cross coordinate.During concrete application, the number of the dip roll is 2
~8.
Compared with prior art, the beneficial effects of the invention are as follows:Kollag provided by the present invention is modified the long Black Warrior
It is low that the coefficient of friction of rock fiber reinforcement PA6 composites compares unmodified long basalt fibre/PA composites with wear rate,
Kollag effectively raises the tribological property of long basalt fibre enhancing PA6 composites;Prepared PA6 is compound
Material has more balanced bulk properties in mechanical property and the aspect of frictional behaviour two, and abrasive resistance is strong, and combination property is excellent, uses
Long lifespan, preparation method is simply efficient, is easy to industrialized production, has promotional value.
Brief description of the drawings
Fig. 1 is used the structural representation of device by preparation method of the present invention.In figure:1- supports, 2- long fibres volume, 3- are led
Roller, the spacing deflector rolls of 4-, 5- extruders, 6- temperature control impregnation molds, 7- dip rolls, 8- boshes, 9- guide rollers, 10- carry-over pinch rolls,
11- pelleters, 12- pressure rollers.
Fig. 2 is that the wear-resisting long basalt fibre prepared by the embodiment of the present invention 1 strengthens PA6 composite impact section surface sweepings
Electromicroscopic photograph.Diagram shows that the interface cohesion of fiber and resin matrix is firm, illustrates wear-resisting long basalt provided by the present invention
The preparation method of fiber reinforcement PA6 composites can be sufficiently impregnated fiber.
Fig. 3 is that the chopped basalt fibre obtained by comparative example 1 of the present invention strengthens PA6 composite impacts profile scanning electricity
Mirror photo.
Embodiment
Referring to Fig. 1, preparation method of the present invention is completed using following devices, and described device is some including being provided with
The support 1 of long fibre volume 2, the temperature control impregnation mold 6 being connected with the port of export of extruder 5, support 1 and temperature control leaching is installed on successively
Deflector roll 3 and spacing deflector roll 4 between stain mould 6, some dip rolls 7 being installed in temperature control impregnation mold 6, it is arranged at temperature control leaching
The bosh 8 of the port of export of stain mould 6, the pressure roller 12 being installed in bosh 8, it is respectively arranged in the porch of bosh 8
With two guide rollers 9 in exit, it is installed on the carry-over pinch rolls 10 in the exit of bosh 8 and is installed on the discharge end of carry-over pinch rolls 10
Pelleter 11.
With reference to specific embodiment, the present invention is described in further detail, and following embodiments are merely to illustrate this hair
It is bright, it is not used in the limitation present invention.
Embodiment 1
By graphite (5wt%), PA6 master batches (60wt%) and γ-isocyanatopropyl triethoxysilane (5wt%) from extrusion
The spout of machine 5 is added, and (dip roll 7 totally 6,240 DEG C of mold temperature) is sufficiently mixed in temperature control impregnation mold 6, then will
Continuous basalt fiber is pulled out with the 15mm/ seconds from temperature control impregnation mold 6, and it is 30wt% to control basalt fibre content, successively
It is granulated, dries by water cooling, pelleter 11, then obtaining the wear-resisting long basalt fibre that length is 10mm strengthens PA6 composite woods
Material.Gained composite is injection moulded to obtain standard batten, test obtains wear-resisting long basalt fibre enhancing PA6 composites
Mechanics and friction and wear behavior, be shown in Table 1.
Embodiment 2
By graphite (10wt%), PA6 master batches (58wt%) and γ-glycidyl ether oxygen propyl trimethoxy silicane
(2wt%) is added from the spout of extruder 5, and (dip roll 7 totally 6, mold temperature are sufficiently mixed in temperature control impregnation mold 6
240 DEG C), then continuous basalt fiber is pulled out with the 15mm/ seconds from temperature control impregnation mold 6, controls basalt fibre content
For 30wt%, it is granulated, dries by water cooling, pelleter 11 successively, then obtains the wear-resisting long basalt fibre that length is 10mm
Strengthen PA6 composites.Gained composite is injection moulded to obtain standard batten, test obtains wear-resisting long basalt fibre and increased
The mechanics and friction and wear behavior of strong PA6 composites, are shown in Table 1.
Embodiment 3
By graphite (15wt%), PA6 master batches (50wt%) and gamma-aminopropyl-triethoxy-silane (5wt%) from extruder 5
Spout add, (dip roll 7 totally 6,240 DEG C of mold temperature) is sufficiently mixed in temperature control impregnation mold 6, then will be continuous
Basalt fibre is pulled out with the 15mm/ seconds from temperature control impregnation mold 6, and it is 30wt% to control basalt fibre content, is passed through successively
Water cooling, pelleter 11 are granulated, dried, then obtaining the wear-resisting long basalt fibre that length is 10mm strengthens PA6 composites.Will
Gained composite is injection moulded on injection machine obtains standard batten, and test obtains wear-resisting long basalt fibre enhancing PA6 and answered
The mechanics and friction and wear behavior of condensation material, are shown in Table 1.
Embodiment 4
By graphite (5wt%), PA6 master batches (60wt%) and gamma-aminopropyl-triethoxy-silane and thio-2 acid two
The mixture (2wt%, respectively 1wt%, 1wt%) of lauryl adds from the spout of extruder 5, in temperature control impregnation mold 6
In be sufficiently mixed (dip roll 7 totally 6,240 DEG C of mold temperature), then by continuous basalt fiber (long fibre basalt) with
The 5mm/ seconds pull out from temperature control impregnation mold 6, and it is 33wt% to control basalt fibre content, successively by water cooling, pelleter
11 are granulated, dry, then obtaining the wear-resisting long basalt fibre that length is 10mm strengthens PA6 composites.
Embodiment 5
By paraffin (20wt%), PA6 master batches (58wt%) and γ-glycidyl ether oxygen propyl trimethoxy silicane
(3wt%) is added from the spout of extruder 5, and (dip roll 7 totally 2, mold temperature are sufficiently mixed in temperature control impregnation mold 6
225 DEG C), then continuous basalt fiber is pulled out with the 15mm/ seconds from temperature control impregnation mold 6, controls basalt fibre content
For 19wt%, it is granulated, dries by water cooling, pelleter 11 successively, then obtains the wear-resisting long basalt fibre that length is 10mm
Strengthen PA6 composites.
Embodiment 6
By graphene (20wt%), PA6 master batches (35wt%) and γ-isocyanatopropyl triethoxysilane (5wt%) from
The spout of extruder 5 adds, and (dip roll 7 totally 4,250 DEG C of mold temperature) is sufficiently mixed in temperature control impregnation mold 6, so
Continuous basalt fiber is pulled out with the 35mm/ seconds from temperature control impregnation mold 6 afterwards, it is 40wt% to control basalt fibre content,
It is granulated, dries by water cooling, pelleter 11 successively, then obtains the wear-resisting long basalt fibre enhancing PA6 that length is 10mm and answer
Condensation material.
Embodiment 7
By molybdenum disulfide (20wt%), PA6 master batches (50wt%), 4- hydroxyoctadecanoic acids anilid (5wt%) from squeeze
The spout for going out machine 5 adds, and (dip roll 7 totally 8,230 DEG C of mold temperature) is sufficiently mixed in temperature control impregnation mold 6, then
Continuous basalt fiber is pulled out with the 20mm/ seconds from temperature control impregnation mold 6, it is 25wt% to control basalt fibre content, according to
Secondary to be granulated, dry by water cooling, pelleter 11, then obtaining the wear-resisting long basalt fibre that length is 5mm strengthens PA6 composite woods
Material.
Embodiment 8
By polytetrafluoroethylene (PTFE) (1wt%), PA6 master batches (87wt%) and triphenyl phosphite (2wt%) feeding from extruder 5
Material mouth adds, and (dip roll 7 totally 7,245 DEG C of mold temperature) is sufficiently mixed in temperature control impregnation mold 6, then by the continuous Black Warrior
Rock fiber is pulled out with the 25mm/ seconds from temperature control impregnation mold 6, and it is 10wt% to control basalt fibre content, successively by water cooling
But, pelleter 11 is granulated, dried, then obtaining the wear-resisting long basalt fibre that length is 20mm strengthens PA6 composites.
Each raw material cited by the present invention can realize the present invention, and the bound value of each raw material and its interval value can
Realize the present invention, embodiment numerous to list herein.
Table 1 is that the wear-resisting long basalt fibre obtained by embodiment 1,2,3 strengthens the mechanical property of PA6 composites and rubbed
Wipe performance.Comparing each item data can draw, wear-resisting long basalt fibre enhancing PA6 composites prepared by the present invention have height
The advantages such as by force, high-ductility, coefficient of friction are low, wear resistance is strong, it can thus be appreciated that the wear-resisting long basalt fibre obtained by the present invention
Enhancing PA6 composites have more excellent combination property in mechanical property and the aspect of friction and wear behavior two, therefore with popularization
Value.
Table 1
Note:Coefficient of friction and wear rate are that sample measures on HT-1000 friction wear testing machines, and test condition is:Often
Temperature, 20N, 1000r/min.Comparative example 1 is:20wt% is chopped basalt fibre (diameter 7um, long 50um) and 80wt%PA6 grains
After son premixing, extruded by extruder in 230 DEG C of melt blendings, through drying after cooling and dicing, obtain the basalt fibre that is chopped
Strengthen PA6 composites, gained composite is injection moulded to obtain standard batten, test obtains the mechanical property of composite
And friction and wear behavior;Comparative example 2 is:30wt% is chopped basalt fibre (diameter 7um, long 50um) and 70wt%PA6 particles
After premixing, extruded by extruder in 230 DEG C of melt blendings, through drying after cooling and dicing, obtain the basalt fibre increasing that is chopped
Strong PA6 composites, gained composite is injection moulded to obtain standard batten, test obtain composite mechanical property and
Friction and wear behavior.
Claims (4)
1. a kind of preparation method of wear-resisting long basalt fibre enhancing PA6 composites, it is characterised in that the preparation method
Composite is prepared by the raw material of following weight percents:1-20wt% kollag, the 10-40wt% long Black Warrior
Rock fiber, 35-87wt% PA6 master batches and 2-5wt% processing aid, the processing aid are silane coupler or/and heat
Stabilizer, the kollag are polytetrafluoroethylene (PTFE), molybdenum disulfide, graphite, paraffin or graphene;
The preparation method employs following devices and prepared by technique:
Described device includes being provided with some long fibre volumes(2)Support(1), with extruder(5)The temperature control that the port of export is connected
Impregnation mold(6), support is installed on successively(1)With temperature control impregnation mold(6)Between deflector roll(3)With spacing deflector roll(4), installation
In temperature control impregnation mold(6)Interior some dip rolls(7), it is arranged at temperature control impregnation mold(6)The bosh of the port of export(8),
It is installed on bosh(8)Interior pressure roller(12), it is respectively arranged in bosh(8)Porch and two guide rollers in exit
(9), it is installed on bosh(8)The carry-over pinch rolls in exit(10)And it is installed on carry-over pinch rolls(10)The pelleter of discharge end
(11);
The preparation technology is:By long basalt fibre from support(1)On long fibre volume(2)Middle extraction simultaneously deploys, by leading
Roller(3)With spacing deflector roll(4)It is incorporated into temperature control impregnation mold(6)Interior dip roll(7)On, extruder(5)By PA6 master batches, admittedly
Body lubricant and processing aid are squeezed into temperature control impregnation mold(6)It is interior, regulate and control temperature control impregnation mold(6)Interior temperature and lead
Pick-up roll(10)Speed, the fibre bundle after dipping passes through bosh(8)The guide roller of porch(9)Enter bosh
(8)Interior pressure roller(12)On cooled down, in pelleter(11)Middle granulation, wear-resisting long basalt fibre enhancing is then obtained after drying
PA6 composites.
2. a kind of preparation method of wear-resisting long basalt fibre enhancing PA6 composites according to claim 1, its feature
It is, the temperature control impregnation mold(6)Interior temperature is 225 ~ 250 DEG C, and the pulling speed of basalt fibre is 5 ~ 35mm/s.
3. a kind of preparation method of wear-resisting long basalt fibre enhancing PA6 composites according to claim 2, its feature
It is, each dip roll(7)Installation direction and fibre bundle moving direction it is perpendicular, adjacent dip roll(7)Between in up and down
Intersect and coordinate.
4. a kind of preparation method of wear-resisting long basalt fibre enhancing PA6 composites according to claim 3, its feature
It is, the dip roll(7)Number be 2 ~ 8.
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