Extrusion coating line ni gaw nambat langai hta asak hkrung ai (sh) si ai: hka lim ai polymer hte npu na n-gun lapran na peel n-gun. Extrusion coating adhesion hpe treater station hte nip lapran na second loi mi laman hta dawdan da ai rai nna, npu de hkrat sum ai tuning kade daram n galaw tim, shut ai ntsa n-gun hte die kata de shang wa ai web hpe hkye la lu na n rai. Ndai laika buk hta, n-gun ja ai, bai nhtang galaw mai ai matut mahkai lam ni hpe kam mai ai hku jaw ya lu ai tsi lajang ai lam, substrate a akyang lailen hte line variable ni hpe tsun da ai.
Hpa majaw Extrusion Coating n-gun n-gun n-gun manghkang byin wa ai
Hka lum ai polyethylene gaw die kaw na 300℃daram kaw na pru wa nna, second langai lahkawng laman nip de du wa ai. Dai window hta gaw substrate hpe tsep kawp katsi kau nna, interface ting hta secondary bonds ni hpe hpaw ra ai. Wetting gaw substrate a npu na n-gun gaw melt a npu na n-gun hpe lai mat wa ai shaloi she byin pru wa ai, dai gaw LDPE a matu centimeter mi hta 31 dynes daram rai nna EAA zawn re ai copolymers ni a matu gaw grau yawm wa chye ai.
N gram lajang da ai polyolefin film gaw 29 kaw nna 31 dynes du hkra, lamu ga jarit kaw nan dung nga ai. Dai majaw, n gram lajang da ai stock hta extrusion coating n-gun n-gun yawm mat nna, corona gram lajang ai lam gaw extrusion coating line shagu hta standard rai nga ai. Hkamja lam hte seng nna, npu hpe 38 kaw nna 42 dynes du hkra sharawt ya nna, grau ahkyak ai gaw, van der Waals matut mahkai ai lam sha n-ga, hka lim ai hte tengman ai chemical matut mahkai lam ni hpe hpaw ya ai polar functional group ni hpe shalawm ya ai.
Practical hku tsun ga nga yang, dyne level hku sha hkyen lajang ai lam hpe n mai jeyang ai. Contamination-driven roughness a majaw dynes 40 hpe hti ai ntsa lam gaw, tengman ai oxidation a majaw dynes 40 hpe hti ai ntsa lam hte n bung ai hku galaw ai. Freshness gaw ahkyak ai: tsi lajang da ai ntsa lam ni gaw asak kaba wa ai, tsi lajang da ai hte nip lapran na gap hkat ai lam second loi mi jan mat ai shaloi, grau nna katsi ai, katsi ai shani ni hta, extrusion coating adhesion gaw shadawn sharam sha hkrat sum mat ai.
Extrusion coating hpe n-gun jaw na matu Corona n-gun hpe masat da ai
Watt density gaw hkang zing ai galai shai ai lam rai nna, tsi lajang da ai npu na minit mi hta square centimeter mi hta watts hku nna tsun ai. Polyolefin hpe film (sh) foil ntsa de extrusion coating galaw na matu, 6 kaw nna 12 W/cm2/min lapran na band gaw galaw shapraw ai line law malawng hpe shinggrup da ai.
Dai hpe hkrak sha sawn la u: watt density gaw web width hte line speed a mahtai hte garan nna, yawng lang ai n-gun hte maren sha re. 1.6 m dam ai line langai mi hpe 200 m/min hte 20 kW lang nna 6.3 W/cm2/min daram shapraw lu ai. Constant width hta speed hpe lahkawng lang jat nna, tsi lajang ai madang langai sha hpe hkam la lu na matu power hpe lahkawng lang jat ra ai.
Trap lahkawng gaw operator ni hpe kalang lang rim ai. Langai, n-gun yawm wa ai nhtang wa ai shara hta lai nna, n-gun hpe sharawt ai gaw, npu hpe wan nat kau ya nna, n-gun n law ai-molecular-n-gun n law ai n-gun hpe shabyin ya nna, n-gun kya ai lamu ga jarit hpe tawn da ai hku nna, extrusion coating adhesion hpe teng sha n-gun yawm shangun ai. Lahkawng, n-gun hpe hkye la na matu n-gun n law ai hku gat ai gaw, kalang ta kaja hkra chyam yu ai raitim, asak kaba wa ai hpang hkrat sum mat ai ntsa lam hpe shabyin ya ai.
Dyne nambat hpe hkan shachyut ai hku n re ai sha, peel n-gun hpe shadawn nna tune galaw u. 10% steps hku nna power hpe peel strength plateaus du hkra jat nna, dai hpang shim lum ai margin naw jaw ai npu na setting de bai nhtang wa u. Dai gaw na a galaw shapraw ai set point re.
Substrate hte maren tsi lajang ai lam
Substrate shagu gaw n bung ai hku galaw nna, langai hta bungli galaw ai setting ni gaw kaga langai hta hkrat sum mat na re.
LDPE hte LLDPE sumla hkrung hpe yu ai.Classic mabyin hpe tsun ai. kaw nna 42 dynes du hkra tup hkrak tsi lajang ra ai. microns npu na film ni hta hpang maga de tsi lajang ai lam hpe yu u, dai gaw unwind hpe pat shingdang ai lam byin shangun ai.
BOPP.Crystallinity grau tsaw ai ngu ai gaw tsi tsi ai lam gaw npu de grau ni htep hkra dung nna asak grau loi ai hpe tsun mayu ai. dynes kaw nna 40 du hkra na target ni gaw law malawng ram ai, raitim extrusion coating a n-gun gaw npu de htawt sit nna n-gun hpe pat shingdang ai slip additives ni hpe hkam sha chye ai.
NTA REM DUSAT.dynes grup yin kaw nna n tsi lajang ai sha hpang nna 45 kaw nna 48 du hkra nhtoi pass sha ra ai.
Aluminium n-gup magap.Conductive re majaw, n-gun pru ai lam gaw kaga hku galaw nna, roll covering gaw grau kaba ai thermal load hpe hkam sharang ra ai. Foil ntsa na oxide layers ni gaw polar group ni hte chemical hku htuk manu ai majaw, extrusion coating hpe foil hte n-gun jaw ai lam gaw, tsi lajang ai lam hpe hkrak hkra galaw ngut ai hpang, grai kaja ai.
Laika hte board.Porous hte hka hpe hkam sha chye ai. Dynes 40 kaw nna 44 du hkra target galaw nna, watt density hpe n-gun n law hkra tawn da nna, gap kata na hka n-gun gaw hka pru ai hpe pat shingdang ai majaw, hka hpe hkang lu ai.
Coated hte nlung hte galaw da ai npu ni.Ndai ni gaw grau shimlum ai, atsawm-hkang lu ai tsi lajang ra ai, hpa majaw nga yang, bungli galaw ai layer gaw n-gun n law ai majaw re. Duty cycle hpe shayawm ai (sh) hkang zing da ai-nbung plasma tsi lajang ai jak gaw, n-gun ja ai corona pass hta grau kaja ai mahtai law law nga ai.
Extrusion coating n-gun hpe galai shai ya ai line galai shai ai lam ni
Tsi lajang ai lam gaw shang gumhpraw langai sha re. Line variable law law gaw mahtai hpe shift galaw ya ai majaw rau jawm hparan ra ai.
Tsi tsi ai hte nip lapran na aten.Ndai gaw grau nna n-gun n jaw ai variable rai nga ai. Lam hpe jak hte mai byin ai daram kadun hkra galaw u. Second jat bang ai shaloi, polar group ni gaw bulk de bai nhtang wa ai shaloi, manu jahpu jaw ra ai.
Web n-gun.Tsi lajang ai lam gaw katsi ai web ntsa hta grau kaja wa nna, nip kaw na katsi ai substrate kaw na adhesion akyu lu la ai. Dai hte maren, grai law hkra preheat galaw ai gaw, nnan hpan da ai hpung ni hpe shapraw kau ya ai.
Ozone hte shaw la ai lam.Ozone gaw tsi lajang ai by-product langai mi rai nna, tsi lajang ai lam n re ai sha, n hkru n kaja ai lam ni hpe mung galaw ya lu ai. Hkrak ai hku shaw la ai gaw, jak ni hpe makawp maga ya nna, gap nbung hpe n galai shai hkra galaw ya ai majaw, extrusion coating adhesion hpe n-gun n rawng hkra galaw ya ai.
Nip dip nna nga nga u.N-gun grau ja ai gaw, hka hpe npu na micro-porosity de shadut ya nna, jak keying hpe grau kaja hkra galaw ya ai. Ndai gaw tsi tsi ai kaw na chemical bonding hpe galai shai na malai, madi shadaw ya ai.
Si ai hte nbung gap ai.Nbung gap kata na melt hpe oxidation galaw ai majaw polymer maga de polar group ni byin pru wa ai. Nbung gap grau galu ai gaw melt oxidation hpe jat shangun nna, n-gun kya ai substrate tsi lajang ai lam hpe daw mi gram lajang ya lu ai - raitim, n-gup magap n-gun n-rawng ai hte n-gup-in hpe mung hkrit tsang shangun ai.
Chill roll ngut ai.Matte chill roll gaw coating ntsa de n-gun n rawng ai hpe htawt sit ya ai, dai gaw bond n-gun hpe n hkra ai sha, downstream print hte lamination galaw ai lam hpe hkra machyi shangun ai.
| Npu npawt | Dyne yaw shada ai | Watt n-gun (W/cm2/min) | Madung hkrit tsang hpa |
|---|---|---|---|
| LDPE sumla hkrung | 38–42 | 6–10 | Hpang maga tsi lajang ai |
| LLDPE sumla hkrung | 38–42 | 8–12 | Nip garai n du shi yang asak kaba wa ai |
| BOPP | 38–40 | 5–8 | Slip jat bang ai htawt sit ai lam |
| NTA REM DUSAT | 45–48 | 3–6 | -ladu lai nna tsi lajang ai, powder galaw ai |
| Aluminum nlung | 42–46 | 6–12 | Roll n-gun n-gun |
| Laika man / board | 40–44 | 4–8 | Gap kata kaw hka lim ai |
| Metal galaw da ai sumla hkrung | 44–50 | 3–5 | Hpri n-gang hpe hkra machyi shangun ai |
Extrusion coating n-gun hpe shadawn nna jep joi ai lam
Nang hpe shadawn shadang lahkawng ra ai: langai gaw ntsa lam a matu, langai gaw npu na matu.
Ntsa lam a matu, dyne pens (sh) test inks ni gaw lawan ai hku hti ai/nre-go jaw ai. Dai ni hpe lapran hte jut lahkawng yan hta lang u, tsi tsi ngut ai hpang kalang ta hte lam galu ai rai yang nip n galaw shi yang bai lang u. Manu dan ai lam ni hpe ka matsing da u; n-gun n rawng ai masa gaw, electrode (sh) dielectric hpe myit maju jung ra ai lam tsun dan ai.
Bond a matu, mai tsai wa sai sample ntsa T-peel test hpe lang u. Extrusion coating ngut ai hpang kalang ta, adhesion gaw naw rawt jat nga ai, dai majaw line kaw na hkrang shapraw ai chyam dinglik ai lam gaw polymer hta hkan nna hpang jahtum manu hpe grai tsun ai (sh) n law ai hku tsun ai. Standard galaw ai ladat gaw, sample ni hpe n jep shi yang hkying hkum 24 tup condition galaw na matu re.
Tsi lajang ai set point ni hpe ninghkap ai peel n-gun hpe asan sha re ai log langai mi hta hkan tam u. Extrusion coating adhesion n-gun yawm mat ai shaloi, dai log gaw tsi tsi ai lam, substrate lot (sh) line speed galai shai mat ai lam hpe tsun dan nna, dai gaw ana jep chyoi ai aten hpe grai shayawm kau ya ai.
Extrusion coating n-gun hpe jahten kau ya ai shut ai lam ni
- Hka ntsa de grai tsan ai shara de tsi lajang ai.Treater hte die lapran na lam galu gaw, ntsa lam hpe shim lum hkra galaw ya ai. Station hpe grau ni hkra htawt sit (sh) watt density hpe jat nna gram lajang u, raitim sum mat ai hpe asan sha hkum hkap la.
- Lai -tsi lajang ai."Shim lum na matu" cranking power gaw, n-gun kya ai lamu ga jarit hpe shabyin ya nna, extrusion coating a n-gun hpe shayawm ya ai. Grau law ai gaw grau kaja ai n re.
- Web a lapran kaw sha chyam yu ai.Hpang jahtum n-gun n rawng ai sha, electrode (sh) dielectric n-gun rawng ai lam hpe madun dan ai.
- Humidity hpe n sawn ai.Ambient humidity grai law ai majaw, hka pru ai hpe pat shingdang nna, gap kata de hka shang wa ai. Season set-point galai shai ai lam gaw, katsi ai shara na hpun ni hta shingra tara hku rai nga ai.
- Shut ai roll cover hpe lang ai.Silicone-ka-up da ai roll gaw watt density kaba hta hkawm ai shaloi, n-gun rawng ai lam ni hpe shalat ya nna, n bung ai tsi lajang ai lam hpe jaw ya ai majaw, extrusion coating adhesion gaw galu kaba ai shara shagu hta n bung ai.
- N hkam la ai reference hpe n jep yu ai.Tsi n galaw ai sha, substrate langai sha a control sample hpe galoi mung tawn da nna, tsi galaw ai wa gaw bungli hpe teng sha galaw nga ai hpe kam mai ai.
FAQ
Q1: Kaja ai extrusion coating hpe n-gun jaw na matu gara dyne madang ra ai kun?
Polyolefin substrate ni a matu, tsi lajang ai shara kaw n re ai sha, nip a shara kaw centimeter mi hta dynes 38 kaw nna 42 du hkra yaw shada ra ai. PET hte foil a matu 45 dynes gaw shim lum ai target re. Dyne level gaw proxy re ai majaw, yaw shada ai lam n re ai majaw, peel test hte galoi mung madi madun u.
Q2: Corona tsi n lang ai sha, ngang kang ai extrusion coating n-gun hpe lu la mai ai kun?
Polar chemistry hpe gun hpai nga sai substrate ni hte sha, shing nrai, shingnip shingna nkau mi (sh) pre-primed galaw da ai sumla ni zawn re ai ni hte sha. Unprimed polyolefins ni hta, n gram lajang da ai ntsa lam ni hpe melt hte kam mai ai hku n mai hka ja ai, gara mechanical (sh) thermal stress npu hta mung n-gun n rawng mat na re.
Q3: Extrusion coating n galaw shi yang, tsi lajang ai lam kade daram lawan ai hku hten za mat ai kun?
Decay gaw nbung katsi ai, nbung katsi ai hte substrate hta madung nga ai. Katsi ai, katsi ai shara ni hta, tsi lajang da ai web gaw shi a dyne level law malawng hpe nhtoi law law tup hkam la lu ai. Hka lum ai, hka lum ai extrusion coating line hta second loi mi hkawm sa ai shaloi sum mat ai lam gaw dynes law law rai chye ai majaw, tsi lajang da ai lam hpe kadun hkra tawn u.
Q4: Line grau lawan ai gaw extrusion coating a n-gun hpe hkra machyi shangun ai kun?
Watt density hpe n galai shai ai sha tawn da ai rai yang n mai byin ai. Speed gaw discharge hta dwell time hpe shayawm ya ai majaw, power hpe maren mara jat ra ai. Treater gaw shi a power ceiling kaw nga ai shara hta, lawan ai lam gaw binding constraint byin wa nna, nang gaw n-gun yawm ai (sh) npu na treatment hpe hkap la ra ai.
Q5: Hpa majaw extrusion coating a n-gun gaw roll langai hte langai n bung ai kun?
Hpa majaw nga yang, substrate lot galai shai ai lam, anti-block (sh) slip additive n-gun galai shai ai lam, electrode gap hta n-gun shayawm ai lam, dielectric n-gun shayawm ai lam, grup yin na hka n-gun shayawm ai lam ni lawm ai. Log peel mahtai ni hpe substrate lot nambat hte shingdaw nna npawt nhpang hpe garan ginhka ai.
Q6: Ozone gaw extrusion coating hpe n-gun n jaw ai kun?
Ozone hkum nan gaw bond hpe n hkra ai, raitim n hkang lu ai ozone gaw n bung ai hku shaw la ai lam hpe madun ai, dai gaw gap nbung hpe galai shai shangun nna, dai majaw discharge hpe galai shai shangun ai. Ozone grai law ai gaw makau na magri daw ni hpe mung jahten kau ya nna, rubber roll shingnip ni hpe mung asak kaba shangun ai.
Q7: Substrate maga lahkawng hpe tsi lajang ra na kun?
Coating hpe hkam la ai maga hpe tsi lajang u. Langai hte langai hpe tsi lajang ai gaw, kalang lang curl hpe hkang na matu (sh) hpang na galaw sa wa na matu reverse face hpe hkyen lajang na matu lang ai raitim, thermal load hpe lahkawng lang jat ya nna, unwind hta pat shingdang na masa hpe grau law hkra galaw ya ai.
Daw dan lam
Extrusion coating adhesion gaw, n-gun atsam n re ai sha, galaw sa wa ai lam a mahtai rai nna, tsi lajang ai lam ni hpe nang hkang lu ai lever kaba dik htum rai nga ai. Substrate hte line speed kaw na watt density hpe masat da nna, n-gun rawng ai sample ni hta peel test hte jep yu nna, tsi lajang da ai lam hpe kadun hkra tawn da nna, drift hpe aten dep mu lu hkra log result ni hpe ka da u.
Shenzhen Hefeng Jiada Technology gaw, corona tsi lajang ai jak ni, plasma tsi lajang ai jak ni hte, n-gup magap n-gup magap hte n-gup magap n-gup magap ni a matu engineering galaw da ai matut mahkai web hpe jasan jaseng ai arung arai ni hpe jaw ya nga ai. Na a substrate, line galu kaba ai, lawan ai hte target peel n-gun hpe garan gachyan ya nna, anhte a engineer ni gaw tsi tsi ai shara hpe size galaw nna, extrusion coating hpe n-gun jaw ya ai setting ni hpe hpaji jaw ya na re.