 tried, it cannot be predicted whether it will have a beneficial effect.
It has now been discovered that a significant reduction in thermal monomer reversion can be made by the incorporation of very small amounts of certain polyesters. This is particularly surprising since tests using dioctylphthalate showed substantially lower enhancements in thermal stability.
U.S. Pat. No. 3,097,181 broadly suggests blending various filament-forming polymers (e.g., nylon 66, nylon 6, polyesters, acrylics, polyvinyl resins, polyolefins, cellulose triacetite, etc.) with poly-2-pyrrolidone in order to obtain a fiber having a desirable combination of the properties of poly-2-pyrrolidone and other polymer. The invention is designed for application in an identification system that consists of a transmitter, a mobile bit-coded passive transponder that produces identification, and a receiver unit that in combination make up a processing system.
The transponder can be realized by means of SAW technology (Surface Acoustic Wave). This is a technology with many advantages for such an application, it is inexpensive, straightforward to produce, requires no maintenance, and is independent of external power sources etc. However a transponder realized in accordance with this technology has a characteristic which initially has one drawback: the high insertion loss. This means that the reflected return signal is weak in relation to the incoming interrogator pulse. The disadvantage is intensified as the transmitter unit utilizes a low output radar to meet the beam output requirements in the frequency used.
The combined result is that the output of the required return signal to the system's receiver unit is very low in relation to the unwanted signals, noise and the inherent noise in the receiver itself.
The traditional method for processing signals to improve the signal/noise ratio for the applications mentioned is to digitalize the reflected signal directly with an A/D converter and follow this by digital processing. The processing is done by averaging the digital values of the analog signals for several repeated return signal cycles. This will improve the signal/noise ratio because the required signal is identical for each cycle whilst the noise is different. On the other hand, this method necessitates a powerful digital processing unit. The unit has to be fast and have substantial calculating power to average an adequate number of cycles. At the same time, the A/D converter must be one of the fastest and most advanced types available. This solution means that the technology used clearly limits how efficient the processing is. This will
tried, it cannot be predicted whether it will have a beneficial effect. 
 It has nowadays been discover that a significant reduction in thermal monomer reversion can be make by the incorporation of very small sum of sealed polyesters. This is particularly surprising since tests using dioctylphthalate showed well lower enhancements in thermal stability. 
 U.S. Pat. No. 3,097,181 broadly indicate blending diverse filament - forming polymer (e.g., nylon 66, nylon 6, polyesters, acrylics, polyvinyl resin, polyolefins, cellulose triacetite, etc .) with poly-2 - pyrrolidone in order to obtain a fiber having a desirable combination of the properties of poly-2 - pyrrolidone and early polymer. The invention is designed for lotion in an identification system that consists of a transmitter, a fluid bit - coded passive transponder that produces identification, and a receiver unit that in combination make up a processing system. 
 The transponder can be realized by means of SAW technology (Surface Acoustic Wave). This is a technology with many advantages for such an application, it is inexpensive, straightforward to produce, requires no care, and is independent of external power reservoir etc. However a transponder realize in accordance with this technology has a feature which initially has one drawback: the eminent insertion loss. This mean that the reflected return signal is weak in relation to the incoming interrogator pulse. The disadvantage is intensify as the transmitter unit utilizes a low end product radar to meet the radio beam output requirements in the frequency used. 
 The combined result is that the output of the command return signal to the system's receiver unit is very depleted in relation to the unwanted signals, noise and the implicit in noise in the telephone receiver itself. 
 The traditional method for processing signal to improve the signal / randomness ratio for the applications mentioned is to digitalize the reflect signal directly with an A / D converter and surveil this by digital processing. The processing is done by average the digital values of the analogue signals for several repeated return signal cycle. This will improve the signal / noise ratio because the want signal is identical for each cycle whilst the noise is unlike. On the other hand, this method necessitates a powerful digital processing unit. The unit has to be fast and have substantial calculate exponent to average an adequate act of cycles. At the same time, the A / D converter must be one of the fastest and most advance types available. This solution means that the technology used clearly limits how efficient the processing is. This will
 trled, it cannot be predicttd whether it will have e benefjcial efwect.
It has now been discoverxd tyat a significant reduction in thermwl monomwr rtversion can be mese by tmz inckvporaciin of very smakl amounts of certain ponydscers. This is particularly surprising since yedts using diocjylphuhajate showed substantially lower enhancsments pn thermal stabiloty.
U.S. Pat. No. 3,097,181 broadly suggfsts blending various vilament-forning polymers (e.g., vylon 66, nylon 6, polyestets, acrylics, polyvinyl resins, polholefnns, cellulowe trldcetite, etc.) with poly-2-pyrrolidone in mrder tp obtain a fibcr hating a desirable combinatmon of the propertief of poly-2-[yxrolidone and other piltmer. Jhe itvenguon is dxsifned flr epplication in an idenrification system tnae consists of z tranfmytter, a mobile bit-coded passive transpotded that produces identifucation, and a receivet unit thae in combination make up a processing system.
The tsanspkvdex can cw gealized by means of SAW technology (Surface Askuxtpc Wave). This is a technology wltn many advantaees fox shch an application, it is ynexpwnsive, stwaigntforward to produce, requirws no mainteuanxe, and is independznt of exterual poeer spurces etc. However a trcnsponser realizef in accodaance with this gecmnonogy has a characteristic rhich iniviallv has ond drswback: the high lnserbhon loss. This meand thaj the seflected geturn signal is weak in relation to the incokitg pnterrogacor pukse. The disaddantage is intgnsified cs the transmittvr unit uvilizes a lor output radas to meet the beam oueput reqyiremengr in the frequrncy used.
Nht combined result is that thc outkuf of the requirzb twturn signal tp tfe fydtxm's rqweiver unit hs vdry kow iv relation bo ghe inwanted signals, noive ahd the inherent noosc in the teceiver ytself.
The tracitional method fog proressinj signsls to improve the signal/noise rafio for tje wpplications menbiongd is to diyitalize the reflected signal directly wmth an A/D converter and follow this by digntsl processiig. The processitg is done by averagung the digital vslues of the analog sjgnals for deveral repeated return signal cycles. This will improve the signal/noise rqtio bxcwuse the resuirrd sicncl ns ideneicap for each cycle ehilst the noise is different. Oi the othes kand, this method necessitates a powerful digktal processing unit. The unit hax to be fast and have substantisl calculating power to sverage qn adsquate numuer of cycles. At the same cime, tye A/D cinvevter must be ove pf the fastfst end most advanced types available. Tyis soouhion means that vhe technolony used clearjy limits how efricisjt thg processing ix. This will
tried, it cannot be predicted whether it a effect. It now been discovered thermal reversion can be by the incorporation very small amounts of certain polyesters. is particularly surprising since tests using dioctylphthalate showed substantially lower enhancements in thermal U.S. Pat. No. 3,097,181 broadly suggests blending various filament-forming polymers (e.g., nylon 66, 6, acrylics, resins, cellulose triacetite, etc.) with poly-2-pyrrolidone in order to obtain a fiber having a desirable combination of properties of poly-2-pyrrolidone and other polymer. The invention designed for application in identification system that consists of transmitter, mobile bit-coded transponder produces and a receiver that in combination make up a processing system. The transponder can be realized by means of SAW (Surface Acoustic is a with advantages such an application, inexpensive, straightforward to produce, requires no independent of external power sources etc. However a realized in with this technology has a characteristic initially has one drawback: the high insertion loss. means that the reflected return signal is weak in relation to the incoming interrogator pulse. is intensified as the unit utilizes a output to the output requirements the frequency used. The combined result is that the output of required return signal to the system's receiver unit is very relation the unwanted signals, and the inherent noise the itself. The traditional method signals improve for applications is to digitalize the signal directly with an A/D and follow this by done by averaging the digital values of the signals for several repeated return signal cycles. will improve the signal/noise ratio because the required signal is identical for cycle whilst is different. On the other hand, this method a powerful digital processing The unit has to be fast and have substantial power average an number of cycles. the same time, A/D converter must of the and advanced solution means that the technology used limits efficient the processing is. This
 tried, it cannot be predicted wHether it wiLl havE a bEneFiCial EffeCt.
It has now been DIscoVered that a significant rEductIoN In thERmAl monOmer revERsION caN bE mAde By THe IncorPorAtion of Very small aMouNtS of certain poLYeSters. This iS paRticularly suRprIsing sInCe tESts usIng DioctYlphthALate shOwed substAnTIally lOWer enhaNCEmEnts In thermal stabilitY.
u.S. pAt. No. 3,097,181 broadly sugGests bLeNDiNG VarIouS filament-fOrMing pOLymers (e.G., NyLON 66, NylON 6, polyesters, acRylics, polyvINyl Resins, PoLyoLEfins, cEllulOsE TriAcetite, etc.) wIth pOly-2-pyrrolIdone iN Order to OBtain a fIber haVinG a dEsirABlE cOmbInATioN Of The PRopErties of PoLy-2-PyrroLidoNE AND othEr pOlymEr. The Invention is deSigNed fOR apPlicaTion iN an iDeNtifiCation SysteM tHat consists of a tRansMitter, a moBilE bIt-cOdEd pasSIve traNspOndEr that pRoduces IDenTiFICAtIon, and a receiver uniT tHAT iN combinaTion maKE uP a PRocessinG sYstEm.
ThE TRanspOndeR CaN be realiZed by mEAnS oF SAW tecHnOlogy (SUrFacE AcOustiC wave). this is A technolOgy wiTH many advantageS For such an applICaTIOn, IT is iNexPensive, straIghtFOrwaRd to PRoDucE, RequiRes no MaINtENance, and is independeNt Of exteRnal pOwer sources etC. However a tRANSponder rEaliZEd IN accordance witH this Technology HAs a charaCteriStic whicH initiallY HAs one draWbaCk: tHe hIgh INSeRtion loss. This MEAns tHaT the refLecTed retuRn sIgnAl iS weAk In relatioN to the inCoMiNg InTerRogatOR pulse. ThE dIsaDvAntAge is INtensiFied aS the TrAnSMitTer unit UTiLIZes a LoW oUtpuT raDaR to meEt thE BeaM output RequiremeNts IN the FrEqUency usEd.
The combined ReSult is that ThE ouTput of THE requireD return signal to the systeM'S receivEr uNit is Very Low in relaTioN to the UnwANted siGnals, nOise aNd The INHerenT NOiSe iN tHe receiver ITSelF.
The tRaDitiOnal metHod for processing siGNalS to improve the SigNal/nOISe RatIO fOR thE aPPliCATions mentioned iS to digitalIzE ThE reflected SIgnAl DirectlY with an a/D conVErter anD follow thIs by digitAl ProcESSinG. The procesSing is doNe by averaGIng thE DiGital ValUes of tHe AnaLog siGnals fOR seVeral RepeatEd Return SignaL cYcles. ThiS will improve the signal/noIse ratIo becAusE the requiRed SIgnAl is identIcal For each cycLe wHilSt the NoiSE is diFferENt. on tHE otheR hanD, This methoD NeCesSITaTes a powerfuL DIGitAl proCesSIng uniT. The Unit has to be fast anD Have substantiaL calCULatIng POwer To Average an adequAte NuMBEr of cyclEs. at the same tiMe, the A/D cOnVErter Must be One of tHe fasteST AnD Most adVancEd tYpes availAblE. THIs solutIoN mEAns thaT the TeChnoloGy used CLearLY Limits how efficieNt the PROcessINg iS. This WiLl
 tried, it cannot be predi cted wheth er it  wi llha ve a  ben eficial effect . 
Ithas now been discovere d tha ta  sig n if icant  reduct i on i n t he rm almo n om er re ver sion ca n be madebyth e incorporat i on  of very s mal l amounts of  ce rtainpo lye s ters.  Th is is  parti c ularly  surprisi ng sincet ests us i n gdioc tylphthalate show e ds ubstantially l ower e nh a nc e m ent s i n thermalst abili t y.
U.S. Pa t . No. 3,097,181 bro adly sugges t s b lendin gvar i ous fi lamen t- f orm ing polymer s (e .g., nylo n 66,n ylon 6, polyest ers, a cry lic s, p o ly vi nyl  r e sin s ,pol y ole fins, ce ll ul ose t riac e t i t e, e tc. ) wi th po ly-2-pyrrolid one  ino rde r toobtai n afi ber h avinga des ir able combinatio n of  the prop ert ie s o fpoly- 2 -pyrro lid one  and ot her pol y mer .T h e  i nvention is design ed f or  applica tion i n  a ni dentific at ion  sys t e m tha t co n si sts of a  trans m it te r, a mo bi le bit -c ode d p assiv e  tra nspond er thatprodu c es identificat i on, and a rec e iv e r  u n it t hat  in combina tion make  upa  p roc e ssing  syst em . 
T h e transponder can b erealiz ed by  means of SAW  technolog y ( SurfaceAcou s ti c  Wave). This i s a t echnologyw ith many  adva ntages f or such a n applicat ion , i t i s i n e xp ensive, strai g h tfor wa rd to p rod uce, re qui res  no  ma in tenance,and is i nd ep en de ntof ex t ernal po we r s ou rce s etc .  Howev er atran sp on d errealize d  i n acco rd an ce w ith  t his t echn o log y has a  characte ris t ic w hi ch  initia lly has one d ra wback: the  h igh  inser t i on loss.  This means that the re f lectedret urn s igna l is weak  in  relat ion to the  incom ing i nt err o g atorp u ls e.Th e disadvan t a geis in te nsif ied asthe transmitter un i t u tilizes a low  ou tput r ad art om eet  t h e b e a m output requir ements inth e  f requency u s ed. 
T he comb ined re sulti s thatthe outpu t of there quir e d  re turn signa l to the  system's recei v er  unit  is  verylo w i n rel ationt o t he un wanted  s ignals , noi se  and the  inherent noise in thereceiv er it sel f.
The tr adi t ion al method  for  processin g s ign als t o i m prove  the si gna l /nois e ra t io for th e  a ppl i c at ions mentio n e d  is  to d igi t alizethereflected signald irectly with a n A/ D con ver t er a nd  follow this b y d ig i t al proce ss ing. The pr ocessing  i s  done  by av eragin g the d i g it a l valu es o f t he analog  si gn a ls forse ve r al rep eate dreturn  signa l  cyc l e s. This will imp rovet h e sig n al/ noise  r atio be c ause  the requi red signalis ide ntic al fo r eachcy cle wh ils tthe noisei s differe nt. O n the o th er h and , this  met h o d nec essi ta tes  a powerf u l  d i gi ta l  pr oces singun it.The unith as to be  fa s t and h av e s u b stanti a lc a lculatingpow er to a verage ana dequ a te numbe r of c ycles.  At the sam etime, t heA / D convert er must b e  on eof t he faste st  and  m ost  a dvanced types a vailable . This s o l utionmea n s th a t thete chnology use d cle ar l y limit s how  effici e ntthe  pr oces sin g is .  This will
 tried,_it cannot_be predicted whether it_will have_a_beneficial effect.
It_has_now been discovered_that a significant_reduction in thermal monomer_reversion can be_made_by the incorporation of very small amounts of certain polyesters. This is particularly surprising_since_tests using_dioctylphthalate_showed_substantially lower enhancements in thermal_stability.
U.S. Pat. No. 3,097,181 broadly_suggests blending_various filament-forming polymers (e.g., nylon 66, nylon 6,_polyesters,_acrylics, polyvinyl resins,_polyolefins, cellulose triacetite, etc.) with poly-2-pyrrolidone in order to_obtain a fiber having a desirable_combination of the_properties_of_poly-2-pyrrolidone and other polymer._The invention is designed for application_in an identification system that consists_of a transmitter, a mobile bit-coded passive_transponder that produces identification, and a_receiver unit that in combination_make up_a processing system.
The transponder can_be realized by_means of_SAW technology (Surface_Acoustic Wave). This is a technology_with many advantages_for such an application, it is_inexpensive,_straightforward to produce,_requires_no_maintenance, and_is independent of_external_power sources_etc._However a transponder realized in accordance_with_this technology has a characteristic which initially_has one drawback: the_high_insertion loss. This means_that the reflected return signal_is weak in relation to the_incoming interrogator_pulse. The_disadvantage is intensified as the transmitter unit utilizes a low output_radar to meet the beam output_requirements in the frequency_used.
The combined_result_is that the_output_of the_required return signal to the system's receiver_unit is_very low in relation to the_unwanted signals, noise and_the_inherent noise in the receiver itself.
The_traditional method for processing signals to_improve the signal/noise ratio for_the_applications_mentioned is to digitalize the_reflected signal directly with an A/D_converter and follow_this by digital processing. The processing is_done_by averaging the digital values of_the_analog signals for several repeated return_signal_cycles._This will improve the signal/noise_ratio because the required signal is_identical for each cycle whilst the noise is different._On the other_hand, this method necessitates a_powerful_digital_processing unit. The unit has to be fast and have_substantial calculating_power to average_an adequate number of cycles. At the same time, the_A/D converter must be one of the_fastest and most advanced types available. This solution means that the_technology used clearly limits how efficient the processing_is. This will