R&D (sh) quality control hta shang lawm ai hpaji ninghkring law law gaw, shang wa ai quality control (IQC) jep joi ai lam ni hpe galaw ai shaloi ndai manghkang hpe hkrum sha lai wa sai rai na re. Lahkawng lang bai maram yu sai majaw, sung sung li li sawk sagawn ra ai ngu kam ai.
"Manifestation" ngu ai lachyum gaw hpa rai ta? Gawgap ai shaloi shi a tactile feel hpe tsun mayu ai kun, shing nrai, hpang jahtum tsi lajang ngut ai hpang na jak n-gun hpe tsun mayu ai kun?
Hpa shai hkat ai kun? 5% shing nrai 50% kun?
Quantitative boundaries hte laksan jai lang ai lam ni n nga yang, ndai ga san hpe "rai na re" (sh) "n rai na re" ngu nna sha htai lu na n re. Dai majaw, anhte gaw "glue viscosity variation" ngu ai manghkang hpe atsawm sha sawk sagawn na matu engineering ningmu hku nna hkrak sha sa wa na re. Anhte jep joi ra ai lam gaw, ndai shai hkat ai lam gaw chyam dinglik ladat ni hta n tara ai lam ni (sh) shingra tara hta byin pru wa ai arung arai galai shai ai lam ni kaw na pru wa ai kun-dai galai shai ai lam ni gaw galaw shapraw ai lam hta gara hku hkrat sum na hkrit tsang hpa ni hpe shabyin ya lu ai kun ngu ai hpe jep joi ra na re.
01 Viscosity a shingra tara
Raitim, kaga ningmu hpe hkap la nna, polymers ni a microscopic physical mungkan hpe myit yu yang, viscosity gaw madung hku nna grai n-gun ja ai lam langai mi rai nga ai. Polymer arung arai ni a viscosity gaw madung hku nna lam lahkawng kaw na byin pru wa ai: langai, molecular chain ni a lapran na lahkawng ngu na matut mahkai lam ni (van der Waals n-gun ni, hydrogen n-gun ni, n bung ai electron sumwi garan ginhka ai lam kaw na byin pru wa ai kalang ta dipole moment ni pyi lawm ai); lahkawng, lamu ga ting hta shinggrup da ai tangled web hte bung ai polymers ni a long-chain structure hta rawng ai hkum hkrang shingjawng ai lam. Anhte gaw, hka lwi ai hpe shabyin ya na matu, n-gun garan ai valve kaw na n-gun (sh) viscometer rotor ntsa na shear n-gun zawn re ai macroscopic n-gun- hpe jai lang ai shaloi, anhte gaw madung hku nna ndai molecule lapran na wan n-gun n-gun ni hpe lai di nna, dai hkum hkrang n-gun ni hpe dawm kau na matu, jak bungli hpe galaw nga ai.
Ndai molecular chain kaw na sliding galaw ai shaloi byin pru wa ai "kata na shingjawng n-gun" gaw viscosity a macroscopic hkrang shapraw ai lam rai nga ai. Dai majaw, viscosity gaw glue a laksan parameter n re ai sha, shi a molecular hkrang hte molecule lapran na matut mahkai lam ni hpe hkum tsup hkra madun dan ai lam rai nga ai.
Ndai lam gaw, ndai parameters ni gaw molecule ni a shamu shamawt ai lam hte shanhte a shingjawng ai lam hpe hkrak galai shai kau ya ai majaw, viscosity gaw nbung laru, shear rate, aten zawn re ai masa ni hta grai hkam sha chye ai lam hpe mung sang lang dan nga ai.
02 Data bias gaw chyam dinglik ai lamu ga jarit ni hpe n tara ai hku n hkan sa ai majaw law law lang byin pru wa ai.
Dai bungli manang wa a san ai lam de bai nhtang wa yang, dai adhesive batch lahkawng gaw n bung ai viscosity ni hpe madun dan ai. Material n kaja ai lam ni hpe n myit tsang shi yang, chyam dinglik ai ladat ni kaw na shang lawm ai lam hpe shawng ningdang kau ra ai. Polymer ntsin law malawng gaw-Newtonian ntsin n re ai majaw, chyam dinglik ai lam hta grai n-gun ja ai lamu ga jarit masa ni hpe tawn da ma ai.
Katsi majan hte polymer n-gang daw ni a shamu shamawt ai lam lapran na n-gun dat matut mahkai lam gaw n-gun dat masa hpe hkan sa ai (Arrhenius empirical tara hte maren). Kalang lang, n-gun rawng ai shara a lapran na nbung katsi ai lam gaw 20℃rai nna, chyam dinglik ai nta a grup yin nbung katsi ai lam gaw 25℃rai nga ai.
Sample hpe sample hkam la ngut ai hpang (dai gaw minit 30 jan ra ai) n-gun n-htum ai hka shin ai shara hta thermal equilibrium hpe n-htuk hkra galaw ai rai yang, shadawn ai data gaw n mai koi yen ai sha, ahkyak ai n bung ai lam ni hpe madun na re. Degree 1 daram nbung katsi ai shaloi, 5% kaw nna 10% du hkra viscosity galai shai wa chye ai.
Shear Rate: Quality hpe hkang ai lam law law gaw, batch ni hpe shingdaw ai shaloi, rotor model hte shinggrup ai lawan ai lam a n bung ai lam hpe n yu ai. Polymer ntsin ni gaw "shear-htum mat ai akyang lailen" hpe madun dan ai.
Rotational speed grau law wa yang, molecular chain ni hpe n-gun dat nna n-gun dat nna hpaw dat ai majaw, shadawn shadang n-gun yawm wa ai. Ahkyak ai gaw, -Newtonian n re ai ntsin ni hpe jep joi ai shaloi, shinggrup ai lawan ai langai hta na viscosity point gaw lachyum n pru ai aten law law nga ai; shingdaw ra ai lam gaw, n bung ai shear n-gun ni hta lu la ai "shear stress–viscosity curves" ni rai nga ai.
Aten (Thixotropy): Fumed silica zawn re ai thixotropy agents ni lawm ai system ni hta, hkring sa ai aten hta hydrogen matut mahkai lam gaw kata kaw byin pru wa ai (dai gaw n-gun grai ja ai), ndai matut mahkai lam gaw shear stress a npu e hkrat sum mat ai (dai gaw n-gun yawm wa ai).
Ndai lam gaw 100-meter gat shingjawng ai hta marai lahkawng shingjawng ai hte loi mi bung ai: langai gaw warm-up hpe ya sha ngut kre nna, hkum hkrang masa hpe kaja dik htum tawn da ai, kaga langai gaw 5 lang ngu na gat shingjawng poi hpe matut manoi gat ngut sai rai nna, shanhte a hkum hkrang masa gaw kru lang ngu na hpe n shakut shi yang n hkam kaja shi ai. Hpang jahtum na mahtai hta mu mada ai shai hkat ai lam gaw, atsam marai hta teng sha shai hkat ai lam hpe n madun lu tim, shanhte a pre-chyam dinglik ai masa hta shai hkat ai lam ni kaw na sha pru wa chye ai. Chyam dinglik ai lam garai n galaw shi yang, sample batch lahkawng a lapran pre-cutting aten (sh) hkring sa ai aten n bung ai rai yang, hti ai lam ni gaw shingra tara hku nna shai hkat wa na re. Dai majaw, n-gun n rawng shi yang, n-gun n rawng ai aten kade daram na hkra rai ra ai, gara aten hta shadawn shadang ni hpe galaw ra ai ngu ai hpe asan sha tsun dan na matu ahkyak nga ai. Aten hpe hkrak hkrak n masat da yang, data ni hpe hkrak hkrak shingdaw lu na n re.
03 N kaja ai ngu sawn la na ahkyak ai shai hkat ai lam hpe hpa gaw shabyin ya ai kun? Dai gaw galoi aten hta dai product hpe hkra machyi shangun na kun?
Shawng nnan hkap la ra ai gaw, polymerization galaw ai lam gaw shi hkum nan n-gun n rawng ai majaw, adhesive batch yawng hta tsep kawp maren mara molecular weight garan gachyan na matu hpyi shawn ai gaw n mai byin ai.
±10% kaw nna ±15% lapran na viscosity galai shai ai lam ni gaw, hkam sharang lu ai shadawn shadang kata de hkrat sum mat ai hpe, n-gun madun ai lam ni hpe madun dan ai.
20%–30% hta jan ai rai yang, sadi maja ra ai-ndai gaw base resin batch (sh) thixotrop a n bung ai hku bra ayai ai lam hta byin mai ai manghkang ni hpe madun ai. Dai zawn lam dam ai majaw gara akyu ni byin chye ai kun?
Na a process window hta hkan nna galaw ai. Adhesive hpe lata hte (sh) semi-automatically hku nna bang yang, 20% shai ai viscosity gaw operator a texture hpe hkam la ai lam hpe hkra machyi shangun chye ai raitim, hpang jahtum na bond n-gun hpe hkra machyi shangun na n re.
Automatic dispensing line ni a matu, viscosity galai shai ai lam gaw, n-gun dat bang ai n-gun hpe hkrak hkra machyi shangun ai. Dai zawn re ai n-gun hte aten masa hta, n-gun kaba ai viscosity gaw adhesive hpe hkrak hkra n lwi hkra pat shingdang ya lu ai (sh) stringing byin shangun chye ai; n-gun n law ai majaw, n-gun yawm mat ai (sh) n myit mada ai sha n-gun yawm mat chye ai. Ndai lam gaw galaw shapraw ai nsen hpe jahten kau ya lu ai. Ahkyak ai lam gaw, interface hpe hkrak hkra hka ja ai lam hta rai nga ai.
Viscosity law wa ai gaw fluidity hpe shayawm ya ai majaw, adhesive gaw substrate a micro-rough ntsa de tup hkrak n shang lu hkra pat shingdang ya ai. Application galaw ai shaloi mu lu ai raitim, interface kaw microscopic voids law law nga ai. Stress npu hta, interface delamination byin wa na masa grai law wa ai. Ad: WorkBuddy AI Rung Karum – -manu n jaw ra ai sha jai lang na matu jin jin rai sai. Ya jang WorkBuddy hpe shakut yu u. Dai hta n-ga, bubble byin wa chye ai. Viscosity law wa ai gaw fluidity hpe shayawm ya ai majaw, adhesive gaw substrate a micro-rough ntsa de tup hkrak n shang lu hkra pat shingdang ya ai. Application galaw ai shaloi mu lu ai raitim, interface kaw microscopic voids law law nga ai. Stress npu hta, interface delamination byin wa na masa grai law wa ai. Ad: WorkBuddy AI Rung Karum – -manu n jaw ra ai sha jai lang na matu jin jin rai sai. Ya jang WorkBuddy hpe shakut yu u. Dai hta n-ga, bubble byin wa chye ai.
Hkum tsup ai adhesive a viscosity law wa ai shaloi, shingjawng ai (sh) shingjawng ai shaloi shang wa ai microbubbles ni hpe shaw kau na matu yak wa ai. Vacuum masa hta pyi, -viscosity kaba ai system ni gaw ndai hka htung ni hpe rim la chye ai. Curing galaw ai shaloi, ndai bubbles ni gaw stress concentration points ni de galai shai wa nna, dai gaw high-voltage wan n-gun lang ai shaloi, hkrak sha daw mi hpe shapraw kau ai (sh) hkrat sum mat chye ai.
[Engineering-Madung Dawdan ai lam-Hpaji Ladat] Ndai kaw engineering-madung nna dawdan ai lam a matu lahkam masum -madung hku nna tang madun da ai:
1. Shawng nnan, n bung ai lam gaw teng man ai kun ngu ai hpe jep yu u .
Sample batch lahkawng hpe viscometer langai sha, rotor, shinggrup ai lawan ai, katsi ai, shing nrai, hkring sa ai aten hte shear aten masa ni bung ai hpe lang nna, langai sha aten hta shadawn ai. Dai shai hkat ai lam gaw 15% hta npu rai yang, dai gaw n bung ai lam byin wa na masa grai law ai. 20% jan shai hkat ai rai yang, matut nna sawk sagawn ra ai.
2. Ya gaw na a process window hpe bai yu ga .
Hpaga lam galaw ai shara hta chyam yu ai: ya aten na nbung n-gun, jai lang ai aten, garan jaw ai arung arai ni a shinglet diameter, hkap la mai ai viscosity range hpe dawdan u.
Ga shadawn, na a jak gaw ±15% na viscosity range kata kaw adhesive hpe ayan shapraw ai rai yang, batch galai shai ai lam gaw bungli galaw ai lam hpe hkra machyi shangun na n re. Raitim, hkam sharang ai window gaw n-gun n law ai rai yang, grau ngang kang ai batch control madang ni hpe supplier hte myit hkrum ra ai.
3. Hpang jahtum, hkrat sum ai lam ni hpe jep yu u .
Hpang jahtum e, dai arung arai gaw, n-gun n-gun galai shai ai hpang, bungli galaw ai chyam dinglik lam ni (ga shadawn, shear n-gun, n-gun hpe ninghkap lu ai, asak kaba wa ai) hpe lai di lu yang, galai shai ai lam ni gaw hkap la mai ai shadawn sharam kata de hkrat sum mat ai hpe madun ai. Batch langai mi hta n kaja ai hka lim ai lam (sh) ngam nga ai hka lim ai lam ni nga yang, laksan viscosity galai shai ai lam ni hpe bai maram yu nna, laksan kata na hkang zing ai lam ni hpe gawgap u. Stable viscosity hpe ra sharawng ai raitim, grau ahkyak ai gaw, na a laksan galaw shapraw ai masa hta shi a hkam kaja lam hpe ra sharawng ai lam rai nga ai.
Ndai lam hpe hkrang shapraw ai hku sawk sagawn na matu, shawng nnan shadawn shadang shut ai lam ni hpe yeng seng kau nna, dai hpang kaja dik ai shadawn shadang kata na process parameters ni hpe shingdaw yu nna, hpang jahtum ndai sawk sagawn ai lam ni hpe tengman ai hkrat sum ai lam ni hte matut mahkai yu u-ndai ladat gaw nambat manu langai sha hte shut shai mat na hpe pat shingdang ya ai. Hpa majaw nga yang, n bung ai adhesive data batch lahkawng (sh) galaw shapraw ai line hta n bung ai dispensing volumes ni hpe mung hkrum katut ai rai yang, ndai ladat hpe hkan sa u.