Extrusion coating lines te ase anaasɛ ewu wɔ nɔma biako so: peel ahoɔden a ɛda molten polymer ne substrate ntam. Wɔsi extrusion coating adhesion ho gyinae wɔ mfɛnsere a ɛyɛ sikani kakraa bi a ɛda treater station ne nip no ntam, na downstream tuning dodow biara ntumi nnye web a ɛhyɛn die no mu a ɛwɔ soro ahoɔden a ɛnteɛ. Saa akwankyerɛ yi ka ayaresa nhyehyɛe, substrate suban ne line variables a ahotoso ma ahoɔden, repeatable bonds wɔ extrusion coating, extrusion lamination ne tandem lines.
Nea Enti a Extrusion Coating Adhesion Yɛ Ɔhaw a Ɛma Ahoɔden a Ɛwɔ Anim
Polyethylene a ayɛ nwini no fi die no mu wɔ bɛyɛ digrii 300 na ɛkɔ nip no mu wɔ sekan biako anaa abien mu. Wɔ saa mfɛnsere no mu no ɛsɛ sɛ ɛma substrate no yɛ nsu koraa na ɛyɛ nkitahodi a ɛto so abien wɔ ntamgyinafo no so. Nsuo ba berɛ a substrate no ani ahoɔden boro melt no ani tension so nko ara, a wɔ LDPE fam no ɛyɛ bɛyɛ dynes 31 wɔ centimeter biara mu na wɔ copolymers te sɛ EAA fam no ɛtumi ba fam.
Polyolefin sini a wɔansiesie no te dynes 29 kosi 31, wɔ ɔhye no so pɛɛ. Ɛno nti na extrusion coating adhesion di nkogu wɔ stock a wɔansa no yare so na nea enti a corona ayaresa yɛ gyinapɛn wɔ extrusion coating line biara so. Ayaresa ma ɔfasu no kɔ soro kodu dyne 38 kosi 42 na nea ɛho hia sen saa no, ɛde polar dwumadi akuw a ɛne nsu a ayow no yɛ nnuru nkitahodi ankasa ba, na ɛnyɛ van der Waals a ɛne ne ho di nkitaho nkutoo.
Nea ɛkyerɛ ankasa ne sɛ wuntumi mfa dyne level nkutoo mmu ahoboa atɛn. Ɔfa a ɛkenkan dynes 40 esiane efĩ-driven roughness nti yɛ n’ade soronko wɔ nea ɛkenkan dynes 40 esiane oxidation ankasa nti. Freshness ho hia: nneɛma a wɔayɛ no aduru no nyin, na extrusion coating adhesion so tew kɛse bere a nsonsonoe a ɛda ayaresa ne nip ntam boro sikɔne kakraa bi, titiriw wɔ nna a ɛyɛ hyew na ɛyɛ nwini mu.
Setting Corona Tumi ma Extrusion Coating Adhesion
Watt density ne ade a ɛhyɛ so, a wɔda no adi sɛ watt wɔ sɛntimita ahinanan biara mu simma biara wɔ asase a wɔayɛ ho adwuma no so. Sɛ wɔde polyolefin kata film anaa foil so a, wɔde mfiase band a ɛyɛ 6 kosi 12 W/cm2/min kata nhama dodow no ara a wɔde yɛ nneɛma so.
Bu ho akontaa tẽẽ: watt density yɛ pɛ tumi a wɔde di dwuma nyinaa a wɔakyekyɛ mu denam wɛb trɛw ne line ahoɔhare a wɔabɔ no mu. Nhama a ne tɛtrɛtɛ yɛ mita 1.6 a ɛnam 200 m/min a ɛde 20 kW di dwuma no ma bɛyɛ 6.3 W/cm2/min. Ahoɔhare no mmɔho abien wɔ ntrɛwmu a ɛkɔ so daa mu na ɛsɛ sɛ wunya ahoɔden mmɔho abien na ama woakura ayaresa dodow koro no ara mu.
Mfiri abien kyere wɔn a wɔyɛ adwuma no mpɛn pii. Nea edi kan no, tumi a wɔma ɛkɔ soro sen baabi a sanba a ɛso tew no hyew asase no ani, ɛma nneɛma a ɛho ntew-molecular-mu duru sua na ɛma extrusion coating adhesion yɛ mmerɛw ankasa denam ɔhye a ɛyɛ mmerɛw a wogyaw so. Nea ɛto so abien no, ahoɔden kakraa bi a wɔde tu mmirika dodo na ama wɔakora ahoɔden so no ma wonya biribi a ɛsɔ hwɛ yiye ntɛm ara nanso entumi nyɛ adwuma bere a abɔ akora no.
Tune denam peel ahoɔden a wobɛsusuw so, na ɛnyɛ dyne nɔma a wobɛtaa akyi. Ma ahoɔden nkɔ soro wɔ anammɔn ɔha biara mu nkyem 10 mu kosi sɛ peel ahoɔden bɛyɛ plateaus, afei san w’akyi kɔ tebea a ɛba fam koraa a ɛda so ara ma margin a ahotɔ wom no so. Ɛno ne wo production set point.
Ayaresa a ɛne Substrate no hyia
Ɛsono sɛnea substrate biara yɛ n’ade, na nhyehyɛe ahorow a ɛyɛ adwuma wɔ biako so no bedi nkogu wɔ foforo so.
LDPE ne LLDPE sini.Asɛm a wɔagye din no. Ɛhwehwɛ sɛ wɔde aduru a edi mũ ma dynes 38 kosi 42. Hwɛ akyi ayaresa wɔ sini ahorow a ɛba fam micron 25, a ɛma siw ba wɔ unwind no so.
BOPP na ɛyɛ.Crystallinity a ɛkorɔn kyerɛ sɛ ayaresa no tra bɛn soro na ɛbɔ kyɛ brɛoo. Mpɛn pii no, botae ahorow a ɛyɛ dynes 38 kosi 40 no dɔɔso, nanso extrusion coating adhesion yɛ nea ɛte nka wɔ slip additives a ɛkɔ soro na esiw bonding kwan no ho.
AYƐMMOA.Efi ase bɛyɛ dynes 41 a wɔansiesie no na ehia hann a ɛtwam nkutoo na ama adu 45 kosi 48. Ayaresa a ɛboro-yɛ asiane ankasa wɔ ha efisɛ ne soro betumi abɛyɛ powder.
Aluminium a wɔde ayɛ krataa.Conductive, enti discharge no yɛ n’ade soronko na ɛsɛ sɛ roll covering no di ɔhyew adesoa a ɛkorɔn ho dwuma. Oxide a ɛwɔ foil so no ne polar akuw hyia wɔ nnuru mu, na ɛno nti na extrusion coating adhesion to foil no taa ye yiye bere a ayaresa no teɛ no.
Krataa ne board.Porous ne nsuo a ɛyɛ mmerɛw. Fa w’ani si dynes 40 kosi 44 so, ma watt density nyɛ nea ɛfata, na di nsu a ɛwɔ mu no so, efisɛ nsu a ɛyɛ hyew a ɛwɔ ɔkwan a ɛda ntam no mu no siw nsu a ɛretu no ano.
Nneɛma a wɔde akata so na wɔde dade ayɛ.Eyinom hia ayaresa a ɛyɛ brɛoo, a wɔhwɛ so yiye{0}} efisɛ adwumayɛ fã no yɛ teateaa. Adwuma a wɔatew so anaasɛ afiri a wɔahyɛ so-wim plasma ayaresa afiri taa yɛ mmuae a eye sen corona pass a emu yɛ duru.
Line Variables a Ɛsakra Extrusion Coating Adhesion
Ayaresa yɛ ade biako pɛ a wɔde hyɛ mu. Line variables pii sesa nea efi mu ba no na ɛsɛ sɛ wɔbom di ho dwuma.
Bere a ɛda ayaresa ne nip ntam.Eyi ne nsakrae a wɔmfa nyɛ hwee sen biara. Ma ɔkwan no nyɛ tiaa sɛnea mfiri betumi. Sekan biara a wɔde bɛka ho a wɔde bɛda wɔn ho adi no bɔ polar akuw ho ka bere a wɔsan de wɔn ani kyerɛ dodow no ara mu no.
Wɛbsaet mu hyew.Ayaresa no tu mpɔn wɔ ntaban a ɛyɛ hyew so, na adhesion nya mfaso fi substrate a ɛyɛ hyew a ɛwɔ nip no so. Nea ɛne eyi bɔ abira no, ɔhyew a ɛboro so a wɔde di kan yɛ no pam akuw a wɔayɛ no foforo no.
Ozone ne nea woyi fi mu.Ozone yɛ aduru a ɛnam-aduru so, ɛnyɛ ayaresa ankasa, nanso ɛsan nso sɛe. Extraction a ɛfata bɔ nnwinnade ho ban na ɛma gap wim tebea no kɔ so yɛ pɛpɛɛpɛ, a ɛma extrusion coating adhesion run to run no gyina pintinn.
Nip nhyɛso na tra.Nhyɛso a ɛkorɔn ma melt no kɔ soro micro-porosity na ɛma mfiri keying tu mpɔn. Eyi boa nnuru a ɛka bom fi ayaresa mu no sen sɛ wɔde besi ananmu.
Die na mframa gap.Oxidation a ɛwɔ melt a ɛwɔ mframa gap no mu no ma polar akuw ba polymer afã. Mframa a ɛware no ma melt oxidation yɛ kɛse na ebetumi atua substrate ayaresa a ɛyɛ mmerɛw - ho ka fã bi nanso ɛde asiane ba anoano a entumi nnyina ne kɔn-in nso mu.
Chill roll wie.Matte chill roll de roughness kɔ coating no ani, a ennya bond ahoɔden so nkɛntɛnso nanso ɛka downstream print ne lamination adwumayɛ.
| Substrate a wɔde yɛ nneɛma | Dyne botaeɛ | Watt a ɛyɛ den (W/cm2/min) . | Asiane titiriw |
|---|---|---|---|
| LDPE sini a wɔde yɛ sini | 38–42 | 6–10 | Akyi ayaresa |
| LLDPE sini a wɔde yɛ sini | 38–42 | 8–12 | Onyin ansa na wɔabɔ nip |
| BOPP na ɛyɛ | 38–40 | 5–8 | Slip additive atutra a wɔde ka ho |
| AYƐMMOA | 45–48 | 3–6 | Over-ayaresa, powder |
| Aluminium a wɔde ayɛ krataa | 42–46 | 6–12 | Roll ɔhyew adesoa |
| Krataa / board | 40–44 | 4–8 | Nsu a ɛwɔ gap mu |
| Sini a wɔde dade ayɛ | 44–50 | 3–5 | Ɔsɛe a ɛba dade a ɛwɔ so no so |
Susuw ne Verifying Extrusion Coating Adhesion
Wohia susuw nhyehyɛe abien: biako ma ɔfasu no, biako ma bond no.
Wɔ soro no, dyne pens anaa test inks ma fast go/no-go read. Fa di dwuma wɔ mfinimfini ne ano abien no nyinaa, bere a woasa no yare no akyi pɛɛ na fa di dwuma bio ansa na nip no adu sɛ ɔkwan no ware a. Kyerɛw gyinapɛn ahorow no to hɔ; drifting trend ka kyerɛ wo sɛ electrode anaa dielectric hia sɛ wɔde adwene si so.
Sɛ wopɛ bond no a, fa T-peel sɔhwɛ di dwuma wɔ nhwɛsode a wɔasa no yare so. Bere a wɔde extrusion coating akyi pɛɛ no, adhesion da so ara renya nkɔso, enti sɔhwɛ a wɔyɛ no tẽẽ fi line no so no ka bo a etwa to a egyina polymer no so no ho asɛm boro so anaasɛ ɛbrɛ ase. Adeyɛ a wɔtaa yɛ ne sɛ wɔbɛma nhwɛsode ahorow no ayɛ nea ɛfata nnɔnhwerew 24 ansa na wɔasɔ ahwɛ.
Track peel ahoɔden tia ayaresa set points wɔ log a ɛnyɛ den mu. Sɛ extrusion coating adhesion drifts, log no ka kyerɛ wo sɛ ebia ayaresa, substrate lot anaa line ahoɔhare sesae, na ɛno twa bere a wɔde hwehwɛ yare no so kɛse.
Mfomso a Ɛtaa Di a Ɛsɛe Extrusion Coating Adhesion
- Ayaresa a wɔyɛ no akyirikyiri dodo wɔ asubɔnten no atifi.Ɔkwan tenten bi a ɛda nea ɔde sa yare no ne nea ɔde di dwuma no ntam no ma nea ɛwɔ soro no ho dwo. Fa station no bɛn hɔ anaa ma watt density so na ama woatua ka, nanso nnye adehwere no ntom kɛkɛ.
- Abofra-ayaresa.Cranking tumi a "yɛ ahobammɔ" ma mmerɛw hye layer a oxidised debris na ɛtew extrusion coating adhesion. Pii nyɛ papa.
- Sɔhwɛ wɔ wɛb no mfinimfini nkutoo.Edge adhesion di nkogu kan na ɛda electrode anaa dielectric wear adi.
- Nsu a ɛyɛ nwini a wobu ani gu so.Nsu a ɛyɛ nwini a ɛkɔ soro no siw nsu a ɛtwetwe no ano na ɛma nsu kɔ ɔkwan a ɛda ntam no mu. Seasonal set-point adjustments yɛ ade a ɛfata wɔ afifide a ɛwɔ ɔhyew mu.
- Sɛ wode roll covering a ɛnteɛ bedi dwuma.Silicone-kata roll a ɛtu mmirika wɔ watt density a ɛkorɔn mu no nya conductive tracks na ɛde ayaresa a ɛnyɛ pɛpɛɛpɛ ma, enti extrusion coating adhesion gu ahorow wɔ ne trɛw mu.
- Ɛnyɛ sɛ wɔrehwɛ reference a wɔansa no yare no mu.Bere nyinaa fa control sample a ɛfa substrate koro no ara ho a wonni ayaresa biara sie de si so dua sɛ treater no reyɛ adwuma no ankasa.
FAQ
Q1: Dyne level bɛn na mihia ma extrusion coating adhesion pa?
Wɔ polyolefin substrates ho no, fa si w’ani so sɛ wobɛma dynes 38 kosi 42 wɔ ɔha biara mu wɔ nip no fã, na ɛnyɛ treater no kwan a wɔfa so fi adi no. Wɔ PET ne foil fam no, dynes 45 yɛ botae a ɛyɛ ahotɔ. Bere nyinaa fa peel test si so dua, efisɛ dyne level yɛ proxy, ɛnyɛ botae no.
Q2: So metumi anya extrusion coating adhesion a emu yɛ den a minni corona ayaresa?
Wɔ substrates a ɛkura polar chemistry dedaw nkutoo, te sɛ nkrataa bi a wɔde akata so anaasɛ pre-primed films. Wɔ polyolefins a wɔanhyɛ no primed so no, nneɛma a wɔansiesie no ntumi mfa nwene no nnyɛ nwini a wotumi de ho to so, na adhesion bedi nkogu wɔ mfiri anaa ɔhyew nhyɛso biara ase.
Q3: Aduruyɛ no porɔw ntɛmntɛm dɛn ansa na wɔde extrusion coating akata so?
Porɔw gyina ɔhyew, ɔhyew ne substrate so. Wɔ tebea horow a ɛyɛ nwini na ɛyɛ kusuu mu no, ntaban a wɔayɛ ho adwuma betumi akura ne dyne dodow no ara mu nna pii. Wɔ extrusion coating line a ɛyɛ hyew na ɛyɛ nwini so no, adehwere wɔ akwantu sikɔne kakraa bi mu no betumi ayɛ dynes pii, enti ma ɔkwan a wɔayɛ ho adwuma no nyɛ tiaa.
Q4: So line ahoɔhare a ɛkorɔn no pira extrusion coating adhesion?
Ɛnyɛ sɛ wɔde watt density no kura mu daa a. Ahoɔhare brɛ bere a wode tra nsu no mu no ase, enti ɛsɛ sɛ woma ahoɔden kɔ soro sɛnea ɛfata. Baabi a treater no wɔ ne power ceiling no, ahoɔhare bɛyɛ binding constraint na ɛsɛ sɛ wobrɛ wo ho ase anaasɛ wogye ayaresa a ɛba fam tom.
Q5: Dɛn nti na extrusion coating adhesion gu ahorow wɔ roll biara mu?
Nea ɛtaa de ba ne substrate lot nsakrae, nsakrae a ɛba anti-block anaa slip additive loading mu, drift wɔ electrode gap mu, dielectric wear, ne ambient humidity. Log peel aba tia substrate lot nɔma de tew fibea no ho.
Q6: So ozone pira extrusion coating adhesion?
Ozone ankasa nsɛe nkitahodi no, nanso ozone a wɔanhyɛ so no kyerɛ sɛ wɔayiyi no a ɛnkɔ so pɛpɛɛpɛ, na ɛno sesa wim tebea a ɛda ntam no ma enti ɛsesa nea ɛtwetwe no. Ozone a ɛkɔ soro nso sɛe dade afã horow a ɛbɛn hɔ na ɛma rɔba nhoma mmobɔwee a wɔde kata so no nyin.
Q7: So ɛsɛ sɛ mesa substrate no afã abien no nyinaa yare?
Fa ɔfã a egye ade a wɔde kata so no yare. Ɛtɔ mmere bi a wɔde afã abien no nyinaa a wɔde sa yare di dwuma de siw curl ano anaasɛ wɔde siesie akyi anim no ma adeyɛ bi a edi hɔ, nanso ɛma ɔhyew adesoa no yɛ mmɔho abien na ɛma asiane a ɛwɔ hɔ sɛ ebesiw kwan wɔ unwind no so no yɛ kɛse.
Awie
Extrusion coating adhesion yɛ adeyɛ a efi mu ba, ɛnyɛ nneɛma agyapade, na ayaresa nhyehyɛe ne lever kɛse a wudi so. Set watt density fi substrate ne line ahoɔhare, hwɛ nokware denam peel sɔhwɛ wɔ conditioned samples, ma ɔkwan a wɔayɛ ho adwuma no nyɛ tiaa, na log nea efi mu ba no sɛnea ɛbɛyɛ a drift bɛda adi ntɛm.
Shenzhen Hefeng Jiada Technology de corona treaters, plasma ayaresa mfiri ne contact web ahotew mfiri a wɔayɛ ama extrusion coating ne lamination lines ma. Kyɛ wo substrate, line trɛw, ahoɔhare ne botae peel ahoɔden, na yɛn engineers bɛ size treatment station na wɔkamfo nhyehyɛe a ɛkura extrusion coating adhesion run akyi run.