CN109001030A - A kind of test method of polyester industrial fiber creep elongation and recoverability - Google Patents
A kind of test method of polyester industrial fiber creep elongation and recoverability Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims abstract description 100
- 229920000728 polyester Polymers 0.000 title claims abstract description 84
- 238000010998 test method Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 82
- 238000011084 recovery Methods 0.000 claims abstract description 32
- 238000012512 characterization method Methods 0.000 claims abstract description 25
- 238000002474 experimental method Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000012803 optimization experiment Methods 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 238000009864 tensile test Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 9
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004153 renaturation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008207 working material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0012—Constant speed test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G01N2203/0017—Tensile
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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Abstract
The present invention relates to the test methods of a kind of polyester industrial fiber creep elongation and recoverability, the numerical value that creep test obtains the parameter of characterization creep elongation and recoverability is carried out to polyester industrial fiber after determining the value range of test parameter, test parameter includes pre-tension, clamp distance, creep load, creep load on rate, creep load rate of debarkation, creep elongation time and creep recovery time, the value range of each test parameter is obtained by optimizing experiment, optimization experiment refers to using one of test parameter x as variable, other test parameters are the experiment of the numerical value of the quantitative parameter that characterization creep elongation and recoverability are obtained to polyester industrial fiber progress creep test, wherein each value of x corresponds to the polyester industrial fiber of multiple groups difference denier.Test method of the invention, applicability is good, and 30% fiber filament is no more than suitable for creep elongation；Equipment requirement is low, as a result reliably；Test creep recovery performance；Process is simple, easy to operate.
Description
Technical field
The invention belongs to field of polymer material detection, are related to the survey of a kind of polyester industrial fiber creep elongation and recoverability
Method for testing.
Background technique
Kind one of of the polyester industrial fiber as industry new high-tech fibers is the culture of building low-carbon economy, promotes ring
Border close friend development and the important materials for supporting national high-tech industry development.Polyester industrial fiber has high intensity, modulus height and ruler
The good characteristic of very little stability, is widely used in the fields such as tire cord, safety belt, air bag and earth working material.Polyester work
Hawser or conveyer belt etc. is made in industry silk, and size and form can be unstable after long-term use, causes material creep failure fracture.Cause
This carries out correlative study to the croop property of polyester industrial fiber to overcome the great realistic meaning of disadvantages described above.
However it is actually rare for the research method and experimental method of polyester industrial fiber croop property.It is long for chemical fibre at present
The creep performance test standard of silk only has GB/T 19975-2005 " high-strength chemical-fibre filament draw performance test method " and has made roughly
Introduction.Although the standard defines the test condition of some experiments, for example the clamp distance of fiber is at least 200mm, creep
Apply load and be divided into initial load and heavy load, initial load is 0.05 ± 0.01cN dtex-1, heavy load is defined as fracture load
5%, 10% etc., load time, that is, heavy load terminates the time as 1min, 5min, 30min, 1h etc..But the above parameter regulation is not
In view of the difference of actual test instrument and different size sample, and do not fully consider initial load loading speed to fiber
The influence of long filament creep test result.Therefore accurately the acquisition of different size fiber sample can not be weighed using the experimental standard
Multiple can contrast and experiment.It is compacted that 103234841 B of patent CN discloses a kind of test ultra high molecular weight polyethylene fiber stretching
The method for being denaturalized energy, for the deficiency in GB/T 19975-2005, to creep test condition (initial creep load on speed
Rate) centainly perfect has been carried out, the tensile speed used is 30~300mm/min, although the method overcome initial loads
Influence of the loading speed to creep test result, but it is smaller (most to be only applicable in this kind of creep elongation of ultra high molecular weight polyethylene fiber
10%) big total creep elongation is no more than, the high high-performance fiber of breaking strength, and not applicable creep elongation is more than 10%
General high-intensity fiber long filament, and the test experiments parameter area that fibres show creep replys part is not directed in the invention, it can not
Obtain complete creep elongation and return curve.
Therefore, the test method that a kind of applicability is good, experimental result is reliable and is tested creep recovery performance is developed
Great realistic meaning.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, provide that a kind of applicability is good, experimental result is reliable and right
The test method that creep recovery performance is tested.
In order to achieve the above object, present invention employs the following technical solutions:
A kind of test method of polyester industrial fiber creep elongation and recoverability, it is right after the value range of test parameter to determine
Polyester industrial fiber carries out the numerical value that creep test obtains the parameter of characterization creep elongation and recoverability；
Test parameter includes pre-tension, clamp distance, creep load, creep load on rate, the unloading of creep load
Rate, creep elongation time and creep recovery time, creep load are constant load applied in creep test process, creep
Load on rate is to be loaded into the rate of creep load after creep test starts from pre-tension, and creep load rate of debarkation is
The rate of pre-tension is unloaded to from creep load, the creep elongation time is undergone to apply creep load to creep load is shed
Time, the creep recovery time is to shed to terminate the time experienced to creep test after creep load；
The value range of each test parameter is obtained by optimizing experiment, and optimization experiment refers to is surveyed with one of
Examination parameter x is variable, other test parameters are quantitatively to carry out creep test to polyester industrial fiber to obtain characterization creep elongation and return
The experiment of the numerical value of the parameter of renaturation energy, wherein each value of x corresponds to the polyester industrial fiber of multiple groups difference denier；
Creep test test parameter all before starting random value, Fuzzy Number Valued range within the scope of Fuzzy Number Valued refer to
Test parameter can guarantee the value range that creep test is gone on smoothly；
The value of x total n, t-th of value is xt, t ∈ (1, n), the value range of x is by xtJudged to obtain
, judgement refers to when x takes xtWhen, if the parameter of each the characterization creep elongation and recoverability of the polyester industrial fiber of same Denier
Coefficient of variation CV value be both less than 5%, then retain xt, conversely, then giving up xt, finally obtained xtMinimum value and maximum value be
For the endpoints thereof of the value range of x；
The parameter for characterizing creep elongation and recoverability includes elastic Creep Deformation rate and plastic creep deformation ratio, and elasticity is compacted
Deforming variability is recoverable Creep Deformation rate after release load, and plastic creep deformation ratio is non-response compacted after discharging load
Deform variability.
As a preferred technical scheme:
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the polyester industrial fiber are
Creep elongation is no more than 30% fiber filament, and the denier of the polyester industrial fiber is 300~6000D.Test of the invention
Method applicability is good, the polyester industrial fiber suitable for different size.Existing test method is only applicable to creep elongation and does not surpass
Cross 10% fiber filament.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the pre-tension are to become
When amount, value is 0.03cN dtex-1、0.04cN dtex-1、0.045cN dtex-1、0.05cN dtex-1、0.055cN
dtex-1、0.06cN dtex-1With 0.07cN dtex-1, when the pre-tension is quantitative, value is 0.05cN dtex
-1；
When the clamp distance is variable, value 200mm, 299mm, 300mm, 301mm, 400mm and 500mm, institute
Stating clamp distance is value 300mm when quantifying；
When the creep load is variable, value is that 2% average ultimate strength, 5% averagely ultimate strength, 20% are averaged
Ultimate strength, 50% average ultimate strength, 70% average ultimate strength, 75% average ultimate strength and 85% average fracture are strong
Power, when the creep load is quantitative, value is 50% average ultimate strength；
When the creep load on rate is variable, value is 0.1N s-1、0.2N s-1、0.5N s-1、1.0N
s-1、1.5N s-1With 2.0N s-1, when the creep load on rate is quantitative, value 0.5Ns-1；
When the creep load rate of debarkation is variable, value is 0.1N s-1、0.5N s-1、1.0N s-1、1.5N
s-1、2.0N s-1With 2.5N s-1, when the creep load rate of debarkation is quantitative, value 1.0Ns-1；
When the creep elongation time is variable, value 20min, 30min, 60min, 90min and 150min is described
When the creep elongation time is quantitative, value 60min；
When the creep recovery time is variable, value 10min, 20min, 30min, 60min and 90min is described
When the creep recovery time is quantitative, value 30min.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the pre-tension, folder
Hold distance, creep load, creep load on rate, creep load rate of debarkation, creep elongation time and creep recovery time
Value range be respectively 0.045~0.055cN dtex-1, 299~301mm, 5~75% average ultimate strengths, 0.20~
1.50N s-1, 0.50~2.0N s-1, 30~150min and 20~90min.Protection scope of the present invention is not limited to that, with
Upper range is only preferred, other ranges are equally applicable to the present invention.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, it is the creep load, compacted
Varying duty loading speed, creep load rate of debarkation, creep elongation time and the value range of creep recovery time are respectively 20
~70% average ultimate strength, 0.50~1.0N s-1, 1.0~1.5N s-1, 60~90min and 30~60min.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the polyester industrial fiber exist
It is at least put down under conditions of temperature is 18~22 DEG C, humidity is 60~70%, pressure is standard atmospheric pressure before carrying out creep test
Weigh 4h.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the polyester industrial fiber are
Finger peels off remaining silk after tens of meters of unstable transition silks of every silk cylinder surface layer.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the creep test use
Tensile testing machine, the creep test mode of the tensile testing machine outfit constant load and fiber special fixture such as Shenzhen are triumphant strong
Sharp WDT-0.2 type almighty test machine.Test condition of the invention is simple, and without professional equipment, common outfit is constant negative
The creep test mode of lotus and the tensile testing machine of fiber special fixture.
A kind of test method of polyester industrial fiber creep elongation and recoverability as described above, the characterization creep elongation
Parameter with recoverability further includes initial creep elongation and total creep elongation, and the initial creep elongation refers to from pre-
The deformation ratio that polyester industrial fiber occurs when tension being added just to reach creep load, the total creep elongation, which refers to, applies creep load
The largest deformation rate that polyester industrial fiber occurs at the appointed time afterwards.
The utility model has the advantages that
(1) test method of a kind of polyester industrial fiber creep elongation and recoverability of the invention, applicability is good, is suitable for
Different type and different size industrial yarn, applicable no more than 30% fiber filament to creep elongation, equipment requirement is low,
Quick test can be completed in the conventional creep test mode of outfit constant load and the stretching experiment equipment of fiber special fixture；
(2) test method of a kind of polyester industrial fiber creep elongation and recoverability of the invention, to creep recovery performance
It is tested, has fully considered influence of each parameter to test result in creep elongation and Recovery Process, reliable test result；
(3) test method of a kind of polyester industrial fiber creep elongation and recoverability of the invention, process is simple, operation side
Just, great popularization.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
The test method of a kind of polyester industrial fiber creep elongation and recoverability of the invention, its step are as follows:
(1) selection and pretreatment of polyester industrial fiber: polyester is obtained after peelling off every unstable transition silk in silk cylinder surface layer
Industrial yarn, under conditions of temperature is 18~22 DEG C, humidity is 60~70%, pressure is standard atmospheric pressure extremely by polyester industrial fiber
4h is balanced less.
(2) determine pre-tension, clamp distance, creep load, creep load on rate, creep load rate of debarkation,
The value range of creep elongation time and creep recovery time:
2.1) value range of pre-tension is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of pre-tension, having denier in every group is the polyester of 500D, 1000D, 3000D and 6000D
Industrial yarn, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, and creep load on rate is 0.5N
s-1, creep load rate of debarkation is 1.0N s-1, the creep elongation time is 60min, turnaround time 30min, and clamp distance is
300mm；Each group experiment condition difference is pre-tension, is respectively 0.03cN dtex-1、0.04cN dtex-1、0.045cN
dtex-1、0.05cN dtex-1、0.055cN dtex-1、0.06cN dtex-1With 0.07cN dtex-1；Successively to pre-tension
For 0.03cN dtex-1、0.04cN dtex-1、0.045cN dtex-1、0.05cN dtex-1、0.055cN dtex-1、
0.06cNdtex-1With 0.07cN dtex-1Judged, pre-tension is 0.03cN dtex-1Or 0.04cN dtex-1, 3000D
With the polyester industrial fiber of 6000D since no enough pre-tensions are allowed to stretch, be easy to happen bending cause to test it is resulting
Creep elongation result is bigger than normal, and pre-tension is 0.06cN dtex-1Or 0.07cN dtex-1, polyester industrial fiber is due to receiving
Deformation just has occurred in acting on before experiment starts for pre-tension, causes creep elongation data less than normal, pre-tension is
0.045cN dtex-1、0.05cN dtex-1Or 0.055cN dtex-1When, the characterization creep of the polyester industrial fiber of same Denier is stretched
The long coefficient of variation CV value with the parameter of recoverability is both less than 5%, it is final determine creep pre-tension range be 0.045~
0.055cN dtex-1；
2.2) value range of clamp distance is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of clamp distance, having denier in every group is the polyester of 500D, 1000D, 3000D and 6000D
Industrial yarn, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, and creep load on rate is 0.5N
s-1, creep load rate of debarkation is 1.0N s-1, the creep elongation time is 60min, turnaround time 30min, and pre-tension is
0.05cN dtex-1；Each group experiment condition difference is clamp distance, be respectively 200mm, 299mm, 300mm, 301mm,
400mm and 500mm；It is successively that 200mm, 299mm, 300mm, 301mm, 400mm and 500mm judge to clamp distance, presss from both sides
Holding distance is 400mm or 500mm, and for elongation at break is greater than 15% sample, the deformation quantity that creep occurs is larger, clamping
Distance is 200mm, and to fixture above and below test equipment, whether alignment requirements are higher, and there are inconvenience, clamp distances 299mm, 300mm
Or when 301mm, the coefficient of variation CV value of the parameter of the characterization creep elongation and recoverability of the polyester industrial fiber of same Denier is all
It is final to determine that creep clamp distance range is 299~301mm less than 5%；
2.3) value range of creep load is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of creep load, having denier in every group is the polyester of 500D, 1000D, 3000D and 6000D
Industrial yarn, each group same experimental conditions are as follows: clamp distance 300mm, creep load on rate are 0.5N s-1, creep load
Rate of debarkation is 1.0N s-1, the creep elongation time is 60min, and turnaround time 30min, pre-tension is 0.05cN dtex-1；Each group experiment condition difference is creep load, is respectively 2% average ultimate strength, 5% average ultimate strength, 20% flat
Equal ultimate strength, 50% average ultimate strength, 70% average ultimate strength, 75% average ultimate strength and 85% average fracture are strong
Power；It is successively that 2% average ultimate strength, 5% averagely ultimate strength, 20% average ultimate strength, 50% are averaged to creep load
Ultimate strength, 70% average ultimate strength, 75% average ultimate strength and 85% average ultimate strength judged, creep load
For 2% average ultimate strength, for the polyester industrial fiber of 500D, the creep load absolute value of application is too small, and error is larger, creep
Load is 85% average ultimate strength, and polyester industrial fiber is easy to be broken in creep process, can not obtain the creep of fiber
Elongation-recoverability curve, creep load are that 5% average ultimate strength, 20% averagely ultimate strength, 50% average fracture are strong
When power, 70% average ultimate strength or 75% average ultimate strength, the characterization creep elongation of the polyester industrial fiber of same Denier with
The coefficient of variation CV value of the parameter of recoverability is both less than 5%, it is final determine creep load range be 5% average ultimate strength~
75% average ultimate strength, preferred scope are that 20% average ultimate strength~70% is averaged ultimate strength；
2.4) value range of creep load on rate is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of creep load on rate, have in every group denier be 500D, 1000D, 3000D and
The polyester industrial fiber of 6000D, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, creep load on
Rate is 0.5N s-1, creep load rate of debarkation is 1.0N s-1, the creep elongation time be 60min, turnaround time 30min,
Pre-tension is 0.05cN dtex-1；Each group experiment condition difference is creep load on rate, is respectively 0.1N s-1、
0.2N s-1、0.5N s-1、1.0N s-1、1.5N s-1With 2.0N s-1；It is successively 0.1N s to creep load on rate-1、
0.2N s-1、0.5N s-1、1.0N s-1、1.5N s-1With 2.0N s-1Judged, creep load on rate is 0.1N s-1,
Creep load on is too long to creep load time-consuming, cannot reflect the creep process of industrial yarn, obtains initial creep deformation ratio
Deviation is big, and creep load on rate is 2.0N s-1, creep load on rate is fast, and the phenomenon that being easy to happen overload causes to miss
Difference is larger, and creep load on rate is 0.2N s-1、0.5N s-1、1.0N s-1Or 1.5N s-1When, the polyester work of same Denier
The coefficient of variation CV value of the parameter of the characterization creep elongation and recoverability of industry silk is both less than 5%, final to determine that creep load adds
Load speed range is 0.2~1.5N s-1, preferred scope is 0.5~1.0N s-1；
2.5) value range of creep load rate of debarkation is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of creep load rate of debarkation, have in every group denier be 500D, 1000D, 3000D and
The polyester industrial fiber of 6000D, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, creep load on
Rate is 0.5N s-1, the creep elongation time is 60min, and turnaround time 30min, pre-tension is 0.05cN dtex-1；Respectively
Group experiment condition difference is creep load rate of debarkation, is respectively 0.1N s-1、0.5N s-1、1.0N s-1、1.5N s-1、
2.0N s-1With 2.5N s-1；It is successively 0.1N s to creep load rate of debarkation-1、0.5N s-1、1.0N s-1、1.5N s-1、
2.0N s-1With 2.5N s-1Judged, creep load rate of debarkation is 0.1N s-1, creep load unloading take long time, cannot
Elastic Creep Deformation Recovery Process during the creep recovery of true reflection industrial yarn, creep load rate of debarkation are 2.5N
s-1, creep load rate of debarkation is fast, since the influence of fixture self inertia is there is a phenomenon where overshooting, wants to fixture and software control
Ask high, data redundancy is poor, and creep load rate of debarkation is 0.5Ns-1、1.0N s-1、1.5N s-1Or 2.0N s-1When, identical denier
The coefficient of variation CV value of the parameter of the characterization creep elongation and recoverability of several polyester industrial fibers is both less than 5%, final to determine
Creep load rate of debarkation range is 0.5~2.0N s-1, preferred scope is 1.0~1.5N s-1；
2.6) value range of creep elongation time is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of creep elongation time, having denier in every group is 500D, 1000D, 3000D and 6000D
Polyester industrial fiber, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, and creep load on rate is
0.5N s-1, creep load rate of debarkation is 1.0N s-1, turnaround time 30min, pre-tension is 0.05cN dtex-1；Respectively
Group experiment condition difference is the creep elongation time, is respectively 20min, 30min, 60min, 90min and 150min；It is successively right
The creep elongation time is that 20min, 30min, 60min, 90min and 150min are judged, the creep elongation time is 20min, compacted
Become the time it is short, not yet enter the steady creep stage, can not the croop property to fiber sample accurately characterized, creep elongation
Time is 150min, and industrial yarn creep has entered state creep stage, the time acquisition of creep parameters is influenced it is smaller, the time compared with
The long efficiency that will affect creep test instead, when the creep elongation time is 30min, 60min or 90min, the polyester of same Denier
The coefficient of variation CV value of the parameter of the characterization creep elongation and recoverability of industrial yarn is both less than 5%, finally determines creep elongation
Time range is 30~150min, and preferred scope is 60~90min；
2.7) value range of creep recovery time is determined；
Creep test is carried out to multiple groups polyester industrial fiber using the triumphant strong benefit WDT-0.2 type almighty test machine in Shenzhen to measure
Each characterization creep elongation and recoverability parameter (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and
Total creep elongation) determine the range of creep recovery time, having denier in every group is 500D, 1000D, 3000D and 6000D
Polyester industrial fiber, each group same experimental conditions are as follows: creep load is 50% average ultimate strength, and creep load on rate is
0.5N s-1, the creep elongation time is 60min, and creep load rate of debarkation is 1.0N s-1, pre-tension is 0.05cN dtex-1；Each group experiment condition difference is the creep recovery time, is respectively 10min, 20min, 30min, 60min and 90min；According to
Secondary is that 10min, 20min, 30min, 60min and 90min judge to the creep recovery time, and the creep recovery time is 10min,
Turnaround time is short, not yet enters equilibrium stage, can not the creep recovery performance to fiber sample accurately characterized, creep time
The multiple time is 90min, and creep recovery has entered the stabilization sub stage, and the time is smaller on the acquisition of creep parameters influence, be will affect instead
The efficiency of creep test, when the creep recovery time is 20min, 30min or 60min, the characterization of the polyester industrial fiber of same Denier
The coefficient of variation CV value of the parameter of creep elongation and recoverability is both less than 5%, final to determine that creep recovery time range is 20
~90min, preferred scope are 30~60min.
(2) after arbitrarily choosing numerical value in the value range of test parameter determined above, using the triumphant strong benefit WDT- in Shenzhen
0.2 type almighty test machine carries out creep test to polyester industrial fiber and obtains the parameter of characterization creep elongation and recoverability
The numerical value of (elastic Creep Deformation rate, plastic creep deformation ratio, initial creep elongation and total creep elongation).
Test method of the invention, applicability is good, is suitable for different type and different size industrial yarn, to creep elongation
Applicable no more than 30% fiber filament, equipment requirement is low, the creep test mode and fibre of conventional outfit constant load
Quick test can be completed in the stretching experiment equipment of dimension special fixture；Creep recovery performance is tested, has been fully considered compacted
Become elongation and influence of each parameter to test result in Recovery Process, reliable test result；Process is simple, easy to operate, great
Promotional value.
Claims (9)
1. a kind of test method of polyester industrial fiber creep elongation and recoverability, it is characterized in that: determining the value of test parameter
The numerical value that creep test obtains the parameter of characterization creep elongation and recoverability is carried out to polyester industrial fiber after range；
Test parameter include pre-tension, clamp distance, creep load, creep load on rate, creep load rate of debarkation,
Creep elongation time and creep recovery time, creep load are constant load applied in creep test process, creep load
Loading speed is to be loaded into the rate of creep load after creep test starts from pre-tension, and creep load rate of debarkation is from compacted
Varying duty is unloaded to the rate of pre-tension, the creep elongation time be apply creep load to shed creep load it is experienced when
Between, the creep recovery time is to terminate the time experienced to creep test after shedding creep load；
The value range of each test parameter is obtained by optimizing experiment, and optimization experiment refers to one of test ginseng
Number x is variable, other test parameters are quantitatively to carry out creep test to polyester industrial fiber to obtain characterization creep elongation and recovery
The experiment of the numerical value of the parameter of energy, wherein each value of x corresponds to the polyester industrial fiber of multiple groups difference denier；
Creep test test parameter all before starting random value, Fuzzy Number Valued range within the scope of Fuzzy Number Valued refer to test
Parameter can guarantee the value range that creep test is gone on smoothly；
The value of x total n, t-th of value is xt, t ∈ (1, n), the value range of x is by xtJudged, is sentenced
It is disconnected to refer to when x takes xtWhen, if the change of the parameter of each characterization creep elongation and recoverability of the polyester industrial fiber of same Denier
Different coefficient CV value is both less than 5%, then retains xt, conversely, then giving up xt, finally obtained xtMinimum value and maximum value be x's
The endpoints thereof of value range；
The parameter for characterizing creep elongation and recoverability includes elastic Creep Deformation rate and plastic creep deformation ratio, elastic creep shape
Variability is recoverable Creep Deformation rate after release load, and plastic creep deformation ratio is non-response creep shape after release load
Variability.
2. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 1, feature exist
It is the fiber filament that creep elongation is no more than 30% in, the polyester industrial fiber, the denier of the polyester industrial fiber is 300~
6000D。
3. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 2, feature exist
In when the pre-tension is variable, value is 0.03cN dtex-1、0.04cN dtex-1、0.045cN dtex-1、
0.05cN dtex-1、0.055cN dtex-1、0.06cN dtex-1With 0.07cN dtex-1, when the pre-tension is quantitative,
Its value is 0.05cN dtex-1；
When the clamp distance is variable, value 200mm, 299mm, 300mm, 301mm, 400mm and 500mm, the folder
When holding distance to quantify, value 300mm；
When the creep load is variable, value is 2% average ultimate strength, 5% average ultimate strength, 20% average fracture
Strongly, 50% average ultimate strength, 70% average ultimate strength, 75% average ultimate strength and 85% average ultimate strength, institute
Stating creep load is when quantifying, and value is 50% average ultimate strength；
When the creep load on rate is variable, value is 0.1N s-1、0.2N s-1、0.5N s-1、1.0N s-1、
1.5N s-1、2.0N s-1, when the creep load on rate is quantitative, value is 0.5N s-1；
When the creep load rate of debarkation is variable, value is 0.1N s-1、0.5N s-1、1.0N s-1、1.5N s-1、
2.0N s-1With 2.5N s-1, when the creep load rate of debarkation is quantitative, value is 1.0N s-1；
When the creep elongation time is variable, value 20min, 30min, 60min, 90min and 150min, the creep
When the elongation time is quantitative, value 60min；
When the creep recovery time is variable, value 10min, 20min, 30min, 60min and 90min, the creep
When turnaround time is quantitative, value 30min.
4. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 3, feature exist
In the pre-tension, clamp distance, creep load, creep load on rate, creep load rate of debarkation, creep elongation
The value range of time and creep recovery time are respectively 0.045~0.055cN dtex-1, it is 299~301mm, 5~75% average
Ultimate strength, 0.2~1.5N s-1, 0.5~2.0N s-1, 30~150min and 20~90min.
5. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 4, feature exist
In the creep load, creep load on rate, creep load rate of debarkation, creep elongation time and creep recovery time
Value range be respectively 20~70% average ultimate strengths, 0.5~1.0N s-1, 1.0~1.5N s-1, 60~90min and 30
~60min.
6. the test method of described in any item a kind of polyester industrial fiber creep elongations and recoverability according to claim 1~5,
It is characterized in that, the polyester industrial fiber is before carrying out creep test temperature is 18~22 DEG C, humidity is 60~70%, pressure
At least to balance 4h under conditions of standard atmospheric pressure.
7. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 6, feature exist
In, the polyester industrial fiber refers to peel off tens of meters of unstable transition silks of every silk cylinder surface layer after remaining silk.
8. the test method of a kind of polyester industrial fiber creep elongation and recoverability according to claim 7, feature exist
In the creep test uses tensile testing machine, and the tensile testing machine is equipped with the creep test mode and fiber of constant load
Special fixture.
9. according to a kind of test method of polyester industrial fiber creep elongation and recoverability described in claim 1, which is characterized in that
The parameter of the characterization creep elongation and recoverability further includes initial creep elongation and total creep elongation, described initial compacted
Become elongation and refer to the deformation ratio for just having reached the generation of creep load polyester industrial fiber from pre-tension, the total creep elongation is
Refer to the largest deformation rate that polyester industrial fiber occurs at the appointed time after applying creep load.
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