CN104804412A - Glass-fiber nylon material for railway insulating piece and preparation method thereof - Google Patents
Glass-fiber nylon material for railway insulating piece and preparation method thereof Download PDFInfo
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- CN104804412A CN104804412A CN201410642024.7A CN201410642024A CN104804412A CN 104804412 A CN104804412 A CN 104804412A CN 201410642024 A CN201410642024 A CN 201410642024A CN 104804412 A CN104804412 A CN 104804412A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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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
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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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
- B29C2948/92542—Energy, power, electric current or voltage
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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
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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
- B29C2948/92704—Temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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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Abstract
The invention relates to a glass-fiber nylon material for a railway insulating piece and a preparation method thereof. The material comprises the following ingredients, by weight, 50-68.5 parts of nylon resin, 0-6 parts of a flexibilizer, 30-35 parts of glass fibre, 0.5-4 parts of a processing aid and 1-5 parts of an anti-floating fiber agent. The prepared insulating piece has high strength, good toughness, good self-lubrication performance, good appearance and excellent low temperature resistance. The material can be recovered. With the addition of the anti-floating fiber agent, the floating fiber problem of a glass fiber reinforced nylon composite material injection-molded product is thoroughly solved, and appearance of the product is improved. By improving a concrete process, fracture surface of nylon resin is transferred from brittle failure to ductile failure, and overall impact strength of the system is enhanced. Thus, low-temperature toughness of the product is increased, and applicability of the product is raised.
Description
Technical field
The present invention relates to a kind of railway collets glass filled nylon material, belong to polymer composite and materials processing is received.
Background technology
High speed railway track fastener system realizes the system in combination that rail and sub rail foundation reliably connect, and should realize the reliability and stability connect, ensure elasticity and the rigidity of track again.Collets, also referred to as Insulation rail distance keeper, are one of high ferro fastener system key components and partss, for keeping and adjustment gauge, prevent the flange of rail under Lateral Force, transversal displacement occurring, widening of gauge and isolation current circuit.Have very large dynamic effect when bullet train travels in orbit, make to be sitting in more comfortable on bullet train, more stable, collets just be had higher requirement, desired strength is high, good toughness, self lubricity, wear resistance be good.In addition, in China's northeast region-by-region, nearly 70 DEG C an of year temperature difference, winter severe cold drying is very long, and the coldest monthly mean temperature is all lower than about-20 DEG C, and close-40 DEG C of Annual lowest climate temperature, therefore, just requires that collets still have good mechanical property at low temperatures.Fiber glass reinforced polyamide 66(Nylon 66, is called for short PA66-GF33) be a kind of engineering plastics with high strength, high-modulus, be widely used in the fields such as railway, automobile, machinery, part substituted metal becomes structural material.According to up-to-date railway standard, PA66-GF33 is by the appointment starting material as the nonmetal component of part in rail fastener system in railway construction field, and its performance index in high-speed railway fastener system are more strict.Glass fiber enhanced nylon product shows low temperature brittleness at low temperatures, is subject to External Force Acting and destroys." provisional technical qualification are checked and accepted in the manufacture of WJ-7 type fastener component " regulation starting material tensile strength is not less than 150MPa, flexural strength is not less than 200MPa, shock strength is not less than 80MPa, above inspecting standard is all that (23 DEG C) detect under normal temperature condition, consider severe cold area fastener practical service environment temperature, for (Ha Qixian) that better meet cold-resistant area uses, from material, need to improve PA66-GF33 low-temperature flexibility, ensure that fastener system component product still shows good use properties at low ambient temperatures.
CN200910043255.5 discloses a kind of high performance nylon composite for railway fastener gauge apron and preparation method, and it comprises nylon resin 100 parts, toughner 1 ~ 20 part, 20 ~ 50 parts, glass fibre and other auxiliary agent 0.1 ~ 3 part.CN201010129613.7 discloses a kind of reinforced nylon material without floating fiber and manufacture method thereof, and it comprises the fine agent 1 ~ 3% of the mixture 55 ~ 75% of polymeric amide and polyamide 66, glass fibre 15 ~ 40%, compatilizer 1-5%, paint film agent 0.5 ~ 5%, toughner 5 ~ 10%, oxidation inhibitor 0.3 ~ 0.6%, nucleator 0.3 ~ 0.5%, coupling agent 0.3% and anti-floating.But all there is tensile strength and the lower problem of flexural strength in the nylon composite materials obtained by above-mentioned two parts of technical schemes.
Summary of the invention
The object of the present invention is to provide that a kind of intensity is high, good toughness, self lubricity, wear resistance are good, and the railway collets glass filled nylon material of low temperature environment can be adapted to, and provide its preparation method.
In order to reach foregoing invention object, the technical solution adopted in the present invention is as follows:
Railway collets glass filled nylon material of the present invention comprises the component of following weight parts: nylon resin 50-68.5 weight part, toughner 0-6 weight part, glass fibre 30-35 weight part, processing aid 0.5-4 weight part and anti-floating fine agent 1-5 weight part.
Further, nylon resin of the present invention is selected from Nylon 66 and/or Nylon 6.
Further, glass fibre of the present invention is alkali-free short glass fiber.
Further, toughner of the present invention is selected from the ethylene-octene copolymer of maleic anhydride graft or the terpolymer EP rubber of maleic anhydride graft.
Further, the content of toughner of the present invention is 3 ~ 6 weight parts.
Further, processing aid of the present invention is selected from least one in oxidation inhibitor, lubricant or nucleator, and described oxidation inhibitor is German Bruggeman auxiliary agent H10; Described lubricant is German Bruggeman auxiliary agent P130; Described nucleator is German Bruggeman auxiliary agent P22.
The preparation method of railway collets glass filled nylon material of the present invention comprise the steps: respectively by real-time to the nylon resin of certainweight number, toughner, short glass fiber and processing aid weight-loss metering feeding to twin screw extruder, pelletizing after mixing granulation water cooling bracing, the fine agent of anti-floating is added in proportion when being transferred to spiral vibration lift, homogenizing bin is entered, packed for standby use after homogenizing after mixing.
Further, described in the preparation method of railway collets glass filled nylon material of the present invention, the processing parameter of twin screw extruder is: main control system rotating speed 400 ~ 500rpm, main frame electric current is not higher than 350A, vacuum tightness is not higher than-0.06MPa, tank temperature is 40 ~ 60 DEG C, reference parameter is 350 ~ 450 Kg/h, and each regional temperature is 200 ~ 350 DEG C.
Nylon 66 of the present invention (PA66) is relative viscosity scope: 2.2-2.8; Amino End Group/(meq/kg) 35-53; The Nylon 66 of fusing point: 253-263 DEG C.
Nylon 6 of the present invention (PA6) is relative viscosity scope: 2.5-3; Fusing point: 210-225 DEG C; The Nylon 6 of Amino End Group/(meq/kg) 30-40.
The short cutting of precursor that described alkali-free short glass fiber T435TM adopts the silicane treating compound containing hydrolysis-resisting agent to draw is standby.
Beneficial effect of the present invention is:
Collets intensity prepared by the present invention is high, good toughness, self lubricity are good, outward appearance is good, resistance to low temperature is excellent, material can be recycled, and the adding of anti-floating fine agent makes the product of glass fiber enhanced nylon matrix material injection moulding float fine problem and thoroughly solves, improve product appearance.
The present invention, by the improvement to concrete technology, makes nylon resin section change ductile failure into from brittle rupture, the overall shock strength of the system that improves, thus adds the low-temperature flexibility of product, adds the suitability of product.
Accompanying drawing explanation
Fig. 1 is the experimental result picture of notched Izod impact strength experiment.
Embodiment
For making above-mentioned purpose of the present invention, feature and advantage can become apparent more, below in conjunction with the drawings and specific embodiments in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The relative viscosity scope of Nylon 6: 2.5-3 in various embodiments of the present invention; Fusing point: 210-225 DEG C; Amino End Group/(meq/kg) 30-40.The relative viscosity scope of Nylon 66: 2.2-2.8; Amino End Group/(meq/kg) 35-53; Fusing point: 253-263 DEG C.Glass fibre is the short alkali-free short glass fiber T435TM(ECS10-3.0-T435TM cut of precursor adopting the silicane treating compound of band hydrolysis-resisting agent to draw), with resistant to hydrolysis function, purchased from Chinese Zhong Cai Taishan glass fiber Ltd.Processing aid H10 is German Bruggeman auxiliary agent H10, is powdered inorganic phosphoric acid salt; Processing aid P130 is German Bruggeman auxiliary agent P130, is the mixture of wax and lubricant; Processing aid P22 is German Bruggeman auxiliary agent P22, is organic and mixture that is inorganic nucleator; Three is all purchased from German Brueggemann chemical company.Anti-floating fine agent PA1033N type, purchased from Shanghai Antu Plastic Additive Co., Ltd., is the black dyes of nylon carrier.The ethylene-octene copolymer (maleic anhydride graft POE) of maleic anhydride graft is purchased from macromolecular material institute of Liaoning University, and model is KT-915.The terpolymer EP rubber (maleic anhydride graft EPDM) of maleic anhydride graft is purchased from macromolecular material institute of Liaoning University, and model is KT-7.
Embodiment 1
The railway collets glass filled nylon material of the present embodiment comprises the component of following weight parts:
Nylon 6 6.8 weight part
Nylon 66 57.2 weight part
Glass fibre 34.3 weight part
Processing aid H10 0.2 weight part
Processing aid P130 0.3 weight part
Processing aid P22 0.2 weight part
Fine agent 1 weight part of anti-floating.
The preparation method of the present embodiment comprises the steps:
(1) preparation of material
By nylon resin, toughner, short glass fiber and processing aid, claimed to control flow, real-time weight-loss metering feeding respectively by four weight-loss meterings, nylon resin, toughner, processing aid are respectively from main spout feeding twin screw extruder; Chopped strand is from side spout feeding twin screw extruder, pelletizing after granulation water cooling bracing, particle is through reciprocating sieve, sieve goes after rectangular and powder materials through spiral vibration lift, claim to add the fine agent of anti-floating in proportion at the bottom weight-loss metering of lift, the fine agent of anti-floating and the good particulate material of modification, in the process that promotes of spiraling, enter homogenizing bin by homogenizing bin top after mixing, last packed for standby use.Wherein the model of twin-screw extrusion unit is SJC-62D.
Twin screw extruder processing condition are:
Embodiment 2
Nylon 66 62.8 weight part
Maleic anhydride graft POE 3 weight part
Glass fibre 31.5 weight part
Processing aid H10 0.2 weight part
Processing aid P130 0.3 weight part
Processing aid P22 0.2 weight part
Fine agent 2 weight part of anti-floating.
(1) preparation of material
By nylon resin, toughner, short glass fiber and processing aid, claimed to control flow, real-time weight-loss metering feeding respectively by four weight-loss meterings, nylon resin, toughner, processing aid are respectively from main spout feeding twin screw extruder; Chopped strand is from side spout feeding twin screw extruder, pelletizing after granulation water cooling bracing, particle is through reciprocating sieve, sieve goes after rectangular and powder materials through spiral vibration lift, claim to add the fine agent of anti-floating in proportion at the bottom weight-loss metering of lift, the fine agent of anti-floating and the good particulate material of modification, in the process that promotes of spiraling, enter homogenizing bin by homogenizing bin top after mixing, last packed for standby use.Wherein the model of twin-screw extrusion unit is SJC-62D.
Twin screw extruder processing condition are:
Embodiment 3 ~ 11 and comparative example
Embodiment 3 ~ 11 and comparative example identical with the preparation method of embodiment 1, its difference is only that the kind of selected material is different with ratio, specifically in table 1.And the glass fiber enhanced nylon modifying material that have detected obtained by above-described embodiment and comparative example, method for testing performance is as follows, the technical requirements that is suitable for in " provisional technical qualification are checked and accepted in the manufacture of WJ-7 type fastener component " about raw-material technical requirements.
Rockwell hardness detects: specify to perform with reference to GB/T 3398.2, adopt R rockwell hardness scale.Sample thickness is not less than 6mm, if when sample thickness is less than 6mm, can superimposed composition sample, and the superimposed number of plies must not more than three layers.Sample answer thickness evenly, surfacing, bubble-free, inclusion-free and physical abuse etc.Each measurement point should from sample edge 10 more than mm, and the interval of any two measurement point must not be less than 10 mm.Each sample test 5 samples, each sample testing 5 point, gets the mean value of its calculation result.
Fusing point is tested: the method B-polarized light microscopic method specified with reference to GB/T16582-2008 performs.2-3mg sample is cut with cutter, 270-280 DEG C is heated between two clean cover glasses, then film is pressed into, slowly put on micro-meldometer after cooling, rapid heating (not higher than 10 DEG C/min) is to 240 DEG C, then be warming up to sample district with 1-2 DEG C/min speed completely dimmed, write down this temperature, as the melt temperature of sample.Each test two samples, two times result value difference is not more than 1 DEG C, calculates the mean value of twice test result.Each testing sample tests 5 groups of samples.Test conditions is temperature (23 scholar 2) DEG C; Relative humidity (50 scholar 10) %.Sample destroys in fixture or circular arc place should give calcellation.Calculate the arithmetical av of 5 specimen test results, retain three position effective digitals.The destruction situation of each sample is described if desired.Tensile strength σ (Mpa) is calculated as: σ=F/bd, in formula: F-ultimate load, N; The width of b, d-sample and thickness, mm.
Flexural strength is tested: specify to perform with reference to GB/T 9341.Sample recommended size is: 80mm × 10mm × 4mm, and trial speed is 2mm/min, at least tests 5 samples.Before test, sample at least places 24h under laboratory standard envrionment conditions, or at least places 24h in moisture eliminator.Measure the width b in the middle part of sample, be accurate to 0.1mm; Thickness h, is accurate to 0.01mm, calculates the mean value of one group of sample thickness, and adjustment span is about 64mm, and the span that measuring and adjusting is good, be accurate to 0.5%.Test conditions is temperature (23 scholar 2) DEG C; Relative humidity (50 scholar 10) %.Sample has obvious subsurface defect or should cancelling of destroying beyond 1/3rd in the middle part of span, and should resample and test.Calculate the arithmetical av of 5 specimen test results.Calculation result represents with three position effective digitals.Flexural strength σ (Mpa) is calculated as: σ=3FL/2bh2, in formula: the power of F-applying, N; L-span, mm; The width of b, h-sample and thickness, mm.
Unnotched impact strength is tested: specify to perform with reference to GB/T 1043.1.Preferably 1 type standard injection moulding batten (size 80mm × 10mm × 4mm), Support Level spacing is 62mm.Impact direction is parallel to size b.In principle, specimen types identical with material supplier's testing method is selected.Often organize sample number and should be no less than 10, and ensure there are 10 effective samples with criticizing.Test conditions is 23 DEG C, relative humidity (50 scholar 10) %.Before test, sample regulates more than 16h under this condition.AcU (KJ/m
2) be calculated as: acU=Ec × 10
3/ b h, in formula: the energy absorbed when the sample of Ec-revised destroys, J; The width of b, h-sample and thickness, mm.1. Failure type is divided into destruction completely: sample fracture becomes two panels or multi-disc; 2. hinge destroys: sample does not fragment into two portions completely, and outside only connects together in the form of a hinged connection by skim; 3. partial destruction: the incomplete fracture not meeting hinge break definition; 4. without destruction: sample does not rupture, and only bends and passes bearing, may have stress whitening concurrently.Select the Failure type the most often occurred, record the shock strength mean value of this Failure type, result represents with three position effective digitals, and wherein hinge destroys also to belong to and destroys completely.If be the most common Failure type without destruction, only record Failure type.
Volume specific resistance is tested: perform with reference to GB/T 1410-2006 regulation.First the test of hygrometric state volume specific resistance should carry out status adjustment, poach takes out after sample filter paper dries surface-moisture after 2 hours, at batten upper and lower surface pad with aluminium foil, and electrodes respectively), batten is steadily placed, under 500V volts DS, measures its resistance value.Wipe dry after poach, test job should complete in 1 min.Dry state treatment condition are process at least 16h at 70 DEG C.After the demoulding, resistivity measurement is without the need to status adjustment, can directly test after having made batten.Volume specific resistance ρ v (Ω cm) calculates: ρ v=Rx A/h, in formula: Rx-volume resistance, Ω; The useful area of A-protected electrode, cm
2; H-sample thickness, cm.Each sample test 5 samples, require that its result is all qualified.
Glass fiber content is tested: specify to perform with reference to GB/T 9345.4.Soak porcelain crucible 24h (quartz crucible or platinum crucible then soak 2h) with the hydrochloric acid soln of 1:1, then clean, dry.The crucible processed is put into High Temperature Furnaces Heating Apparatus in 650 DEG C of calcination 20min, cool 1-3min in atmosphere after taking-up, then put into moisture eliminator cool to room temperature, weigh, repeat calcination until twice weighting error is less than 0.3mg.Take sample mass 1g-2g, put into crucible, and then crucible is put into the retort furnace being preheated to specified temperature (650 DEG C), burning 30min.Then crucible is put into moisture eliminator and cool 1h, or make it be cooled to room temperature, and weigh on analytical balance, be accurate to 0.1mg.Under the same conditions, then the 30min that burns, until constant weight, namely the difference of twice weighing result is not more than 0.5mg in succession.Glass fiber content is calculated as: M1/M0 × 100%; In formula: M0-sample mass, g; M1-gained glass quality, g.Each sample test 5 samples, require that its result is all qualified, result is accurate to 0.1%.
Melt (quality) flow rate is tested: perform with reference to by GB/T3682 regulation.Adopt 2.095mm standard mouth mould 280 DEG C, test under 2.16kg condition.First sample is carried out drying or vacuum drying treatment by the requirement of injection moulding batten; Standard mouth mould is put into barrel, insert piston rod, start heat up, arrive temperature required after, constant temperature is 15min at least; Extract piston rod, add 6-8g sample in barrel, reinsert piston rod, add load or sub-load, constant temperature 4-5min, then add to required load.Instantly when graticule arrives barrel end face, start with manual time-keeping, cut off extrudate with parting tool simultaneously and abandon it.Then, the extrudate segment of pressing certain hour interval (5-15s/30s) is collected one by one.Cutting is stopped when the upper graticule of piston rod reaches barrel end face.Abandon the segment of naked eyes visible bubble in bubble.After cooling, the segment retained (at least 3) is weighed one by one, is accurate to 1mg, calculate their average quality.If the maximum value in single weighing value and the difference of minimum value exceed 15% of mean value, then give up this group data, and again test with fresh sample.Melt (quality) flow rate is calculated as: MFR=600m/t; In formula: MFR-melt (quality) flow rate, g/10min; The average quality of m-segment, g; The timed interval of t-segment, s.Each sample test 3 samples.Test-results gets two position effective digitals, and records the test conditions (as 280/2.16) used.
Experimental result is in table 1.
Table 1 embodiment 1 ~ 11, comparative example and detected result thereof
Continued 1
Experimental result shows, and along with the increase of toughner content, the non-notch surging force of finished product strengthens, and shows better toughness, the overall shock strength of the system that improves.When adding the toughner of 0 ~ 12 weight part, the individual Performance Detection of resulting materials all meets in " provisional technical qualification are checked and accepted in the manufacture of WJ-7 type fastener component " about raw-material technical requirements.Under processing condition of the present invention, along with the increase of toughner, tensile strength, flexural strength reduce gradually, when toughner content higher than 6% time, melt flow rate (MFR) reduces a lot, same injection moulding speed and pressure, the time that material stops in screw rod can be relatively elongated, is unfavorable for that injection molding is shaping.Therefore, under technique of the present invention, in order to the low temperature suitability of Reinforced Nylon resin, select the toughner of interpolation 0 ~ 6 weight part to carry out modification.
When in nylon resin system during toughner content 3 ~ 6 weight part, Insulation rail distance keeper product is when impacting for-30 DEG C ~-45 DEG C, the EPDM particle be dispersed in system still has good toughness, effectively can absorb shock load, makes product expression go out good low-temperature flexibility; And product is easily processed, there is good intensity, the service requirements under varying environment can be met.Therefore, the present invention preferably adds 3 ~ 6 weight part toughner.
Experimental example 1
The production of insulation (gauge) block: modifying material prepared by embodiment 10,11 and comparative example 1,2 dried respectively, bake out temperature sets 80 DEG C-130 DEG C, carries out forming process with injection moulding machine.Insulation (gauge) the block product of injection moulding is placed in low pressure encloses container, operating pressure: 0-0.06MPa, temperature range: 100-110 DEG C, the poach time: 1-4 hour, after conditioning, obtains insulation (gauge) block product.Wherein the producer of injection moulding machine is Taiwan Fuqiangxin Precision Industrial Stock Co., Ltd, and model is HN450SV.
Injection molding process condition is:
Set injection moulding machine Heating temperature successively: 250 DEG C-310 DEG C, a district, two 250 DEG C-300 DEG C, districts, three 240 DEG C, districts ~ 290 DEG C, four 240 DEG C, districts ~ 280 DEG C, five 220 DEG C, districts ~ 260 DEG C,
Locked mode pressure >=80T, injection time >=2S, injection pressure >=30Mpa
Dwell time >=10S, cooling time >=10S, total cycle >=35S.
The notched Izod impact strength of testing example 10,11 and insulation (gauge) block obtained by comparative example 1,2 under 22 DEG C ,-30 DEG C and-50 DEG C of conditions respectively.
Respectively by above-mentioned collets under 22 DEG C ,-30 DEG C and-50 DEG C of conditions freezing 1 hour, carry out falling weight impact test, by a limb of Insulation rail distance keeper by base plate overhead gage, the impact rod that 4.5Kg is heavy freely falls from the height of 0.45m, and make shock point be positioned at the center of Insulation rail distance keeper two limb fin, randomly draw 5 in the finished product that each embodiment is obtained and carry out impact experiment, every part bump 6 times.
The experiment display that notched Izod impact strength detects, when material of the present invention adds the toughner of 3 weight parts, product is-50 DEG C time, and notched Izod impact strength is 5.998 KJ/m
2, unnotched impact strength is 93KJ/m
2, meet the technical requirements in " provisional technical qualification are checked and accepted in the manufacture of WJ-7 type fastener component ", although shock strength raises with the increase of toughner content, tensile strength, flexural strength reduce gradually; Consider the comprehensive use of product, preferably under present invention process condition, the toughner adding 3 ~ 6 weight parts in nylon resin carries out modification.
Drop impact experiment display, the said products impacts 6 times under 4.5kg drop impact, does not all break, and has good toughness.Illustrate under processing condition of the present invention, when toughner content is 3 ~ 6 weight part in nylon resin system, after Insulation rail distance keeper product is freezing at-50 DEG C, still there is enough toughness.
Claims (8)
1. a railway collets glass filled nylon material, is characterized in that it comprises the component of following weight parts:
Nylon resin 50-68.5 weight part
Toughner 0-6 weight part
Glass fibre 30-35 weight part
Processing aid 0.5-4 weight part
Anti-floating fine agent 1-5 weight part.
2. a kind of railway collets glass filled nylon material according to claim 1, is characterized in that described nylon resin is selected from Nylon 66 and/or Nylon 6.
3. a kind of railway collets glass filled nylon material according to claim 1, is characterized in that described glass fibre is alkali-free short glass fiber.
4. a kind of railway collets glass filled nylon material according to claim 1, is characterized in that described toughner is selected from the ethylene-octene copolymer of maleic anhydride graft or the terpolymer EP rubber of maleic anhydride graft.
5. a kind of railway collets glass filled nylon material according to claim 4, is characterized in that the content of described toughner is 3 ~ 6 weight parts.
6. a kind of railway collets glass filled nylon material according to claim 1, is characterized in that described processing aid is selected from least one in oxidation inhibitor, lubricant or nucleator,
Described oxidation inhibitor is German Bruggeman auxiliary agent H10;
Described lubricant is German Bruggeman auxiliary agent P130;
Described nucleator is German Bruggeman auxiliary agent P22.
7. the preparation method of a kind of railway collets glass filled nylon material described in claim 1 ~ 6 any one, it is characterized in that its comprise the steps: respectively by real-time to the nylon resin of certainweight number, toughner, short glass fiber and processing aid weight-loss metering feeding to twin screw extruder, pelletizing after mixing granulation water cooling bracing, the fine agent of anti-floating is added in proportion when being transferred to spiral vibration lift, homogenizing bin is entered, packed for standby use after homogenizing after mixing.
8. the preparation method of a kind of railway collets glass filled nylon material according to claim 7, it is characterized in that the processing parameter of described twin screw extruder is: main control system rotating speed 400 ~ 500rpm, main frame electric current is not higher than 350A, vacuum tightness is not higher than-0.06MPa, tank temperature is 40 ~ 60 DEG C, reference parameter is 350 ~ 450 Kg/h, and each regional temperature is 200 ~ 350 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642024.7A CN104804412A (en) | 2014-11-13 | 2014-11-13 | Glass-fiber nylon material for railway insulating piece and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106867247A (en) * | 2017-01-23 | 2017-06-20 | 泰州艳阳天塑料科技有限公司 | A kind of high temperature resistant, high intensity color inhibition reinforced PA66 and preparation method thereof |
| CN107778850A (en) * | 2017-11-02 | 2018-03-09 | 雪龙集团股份有限公司 | A kind of high-strength water-resistance solution nylon is without wheel hub fan material and preparation method thereof |
| CN111073273A (en) * | 2019-12-31 | 2020-04-28 | 上海普利特复合材料股份有限公司 | Glass fiber reinforced PA6 composite material for improving floating fiber and high surface smoothness and preparation method thereof |
| CN111253741A (en) * | 2020-03-16 | 2020-06-09 | 深圳市高科塑化有限公司 | High-strength hydrolysis-resistant nylon alloy reinforced material and preparation method thereof |
| CN113980459A (en) * | 2021-11-12 | 2022-01-28 | 安徽中鼎橡塑制品有限公司 | High-rigidity glass fiber reinforced nylon composite material and preparation method thereof |
| DE102021202508A1 (en) | 2021-03-15 | 2022-09-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Use of a stabilizer composition for stabilizing polyolefin recyclates, stabilizer composition, masterbatch concentrate, plastic composition, molding material or molding, method for stabilizing a polyolefin recyclate and use of a plastic composition |
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| CN101781456A (en) * | 2010-03-17 | 2010-07-21 | 东莞劲胜精密组件股份有限公司 | Reinforced nylon material without floating fiber and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106867247A (en) * | 2017-01-23 | 2017-06-20 | 泰州艳阳天塑料科技有限公司 | A kind of high temperature resistant, high intensity color inhibition reinforced PA66 and preparation method thereof |
| CN107778850A (en) * | 2017-11-02 | 2018-03-09 | 雪龙集团股份有限公司 | A kind of high-strength water-resistance solution nylon is without wheel hub fan material and preparation method thereof |
| CN111073273A (en) * | 2019-12-31 | 2020-04-28 | 上海普利特复合材料股份有限公司 | Glass fiber reinforced PA6 composite material for improving floating fiber and high surface smoothness and preparation method thereof |
| CN111253741A (en) * | 2020-03-16 | 2020-06-09 | 深圳市高科塑化有限公司 | High-strength hydrolysis-resistant nylon alloy reinforced material and preparation method thereof |
| DE102021202508A1 (en) | 2021-03-15 | 2022-09-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Use of a stabilizer composition for stabilizing polyolefin recyclates, stabilizer composition, masterbatch concentrate, plastic composition, molding material or molding, method for stabilizing a polyolefin recyclate and use of a plastic composition |
| WO2022194672A1 (en) | 2021-03-15 | 2022-09-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Use of a stabilizer composition for stabilizing polyolefin recyclates, stabilizer composition, master batch concentrate, plastic composition, molding compound or molding, method for stabilizing a polyolefin recyclate and use of a plastic composition |
| CN113980459A (en) * | 2021-11-12 | 2022-01-28 | 安徽中鼎橡塑制品有限公司 | High-rigidity glass fiber reinforced nylon composite material and preparation method thereof |
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