PET krataa a wɔde yiyi mu no afiri a wɔde hyɛ mu .

PET (polyethylene terephthalate) nkratafa, titiriw APET (Amorphous PET) ne rPet (recycled PET) nkratafa, wɔde di dwuma kɛse wɔ soro-performance packaging fields te sɛ aduan trays, blister packaging, cosmetics packaging, etc. Ne production ne nsɛso wɔ nsɛdi ahorow no ne PVC sheets raughterure, nanso fite temperature Adwinnade no wɔ ne nhyehyɛe ne nea wɔhwehwɛ soronko.

 

Ayɛyɛdeɛ a wɔde yɛ afieboa .

Pet krataa a wɔde kyerɛw nsɛm .

PET krataa a ɛda adi pefee .

Pet a wɔde kyekyere nneɛma ho krataa .

Ade kɛse a ɛwɔ PET mu ne:

1. Nsu a ɛwɔ nsu mu kɛse: Sɛ wɔyɛ PET raw materials ho adwuma wɔ ɔhyew a ɛkɔ soro mu a, nsu betumi ama ayɛ hydrolyze, na ɛde molecule chain abubu, ayɛ mmerɛw, ayɛ fitaa, na ama nneɛma no mfiridwuma so atew kɛse. Enti, drying nhyehyɛe no yɛ nkwa nhama a ɛma PET yɛ.

. Sɛnea ɛbɛyɛ foforo no, ɔhyew betumi ama crystallization anya nkɔso na ayɛ ɔhyew{1}}cPet nkratafa a ɛko tia (te sɛ fononoo trays).

Pet flake crystallizer ne afiri a wɔde fa nneɛma a ɛyɛ adwuma ankasa .

1. Probes ne control loop ahorow pii wɔ mframa a ɛkɔ mu ne ɔhyew adaka no mu de hwɛ hu sɛ ɔhyew, ɔhyew alarm ne ahobammɔ a ɛyɛ adwuma ankasa (nhwehwɛmu ahorow 2, amansin ahorow 4) wɔ hɔ.

2. Ma kankan no yɛ papa na ama woahwɛ ahu sɛ ade no kanyan pɛpɛɛpɛ na ɛyɛ mmerɛw, na ade no nni agglomeration .

3. 360-degree thermal insulation design (a mframa a ɛsan ba ka ho) de hwɛ ma ahoɔden a wɔde di dwuma wɔ ɔhyew mu no yɛ adwuma yiye sen biara .

4. Liao Wei control mfiridwuma a aba foforo a ɛbɛma Liao Wei ayɛ nea ɛyɛ den na ahobammɔ wom .

 

A standard Pet Sheet extrusion production line titiriw ne nhyehyɛe ahorow a edidi so yi:

1. Raw material pretreatment system - ɔfã a ɛho hia sen biara .

·Dehumidification ne drying nhyehyɛe:

·Nnwinnade a ɛyɛ adwuma: Anyɛ yiye koraa no, wɔde ntɛtea ntwahonan abien a ɛma nsu fi ntwahonan ne dryers mu ahyɛ mu.

·Workflow: Eyi yɛ adeyɛ a ɛkɔ so daa. Dryer yɛ adwuma bere nyinaa ma ɛyɛ PET nneɛma a ɛyɛ dry (mpɛn pii no wɔ granular kwan so) wɔ ɔhyew a ɛkorɔn mu (te sɛ 150-180℃C) anyɛ yiye koraa no nnɔnhwerew 4-6, na ɛtew nsu a ɛwɔ mu no so ma ɛba fam sen 50ppm (0.005%) (ɛtaa hwehwɛ<30ppm). The other one is used as a backup or regeneration to ensure uninterrupted production.

·Vacuum suction system: Wɔde raw materials a ayow no kɔ extruder hopper no mu tẽẽ denam vacuum pipeline a wɔato mu koraa so na amma nsuo ankɔ mu bio.

2. Extrusion nhyehyɛe .

·Extruder: .

·Single screw exhaust extruder: Eyi ne nhyehyɛe a ɛyɛ pɛpɛɛpɛ ma PET krataa a wɔyɛ.

·Adɛn nti na ɛsɛ sɛ wɔtwe wɔn ho fi ho? Ɛwom sɛ wɔama nneɛma a wɔde yɛ no ayow de, nanso mframa a ɛyɛ hyew kakraa bi (nsu a ɛtɔ, oligomers) da so ara ba bere a ɛreyɛ ayɛ hyew no. Wɔde ntokuru a ɛwɔ mframa a wɔde yi mframa mu no ahyɛ mframa a wɔde fi mu no mu na wɔde abɔ vacuum pɔmpɛ ho, a ebetumi de ahoɔden ayi saa mframa yi wɔ bere a ɛreyɛ ayɛ hyew no mu, na ɛhwɛ hu sɛ ade a etwa to no nni bubble na mfomso biara nni ho.

·Screw Design: Wɔayɛ no titiriw ama nsu a ɛyɛ hyew, beae a ɛyɛ hyew, ne PET su afoforo, a mpɛn pii no ɛwɔ L/D a ɛware (afã horow), te sɛ 32:1 anaa nea ɛboro saa, na ama ayɛ sɛ nea ɛbɛbɔ na ayɛ biako sɛnea ɛsɛ.

·Melt filter ne gear pɔmpɛ (wopɛ nanso ɛho hia):

·Melt Filter: Titiriw bere a wode RPET (ade a wɔasan de adi dwuma) redi dwuma no, wɔde di dwuma de yi efĩ ne carbide nketenkete a ɛwɔ nsu a ɛreworo mu no mu.

·Gear pump: Wɔde ahyɛ extruder outlet ne die head ntam, a wɔde di dwuma de si melt pressure a ɛyɛ den yiye, yi flow fluctuations a efi extruder screw pulses mu ba no fi hɔ, na hwɛ hu sɛ ultra-High standard uniformity of sheet thickness. Ɛyɛ ade titiriw a wopɛ a wode bɛyɛ nneɛma a ɛkorɔn-End Sheet nneɛma.

·Mold ti:

·Hanger Style T-Nneɛma a wɔayɛ no sɛnea ɛte no: Ɛte sɛ PVC krataa hama no, ɛkyekyɛ PET a adɔ no mu ma ɛyɛ blanks a ne tɛtrɛtɛ ne ne kɛse a wɔpɛ. Ɛsɛ sɛ channel design no yɛ nsakrae ma ɛne PET no su a ɛyɛ hyew no hyia. Mpɛn pii no, wɔde afiri a wɔde siesie nneɛma a ɛyɛ hyew a wɔde yɛ nneɛma a ɛyɛ pɛpɛɛpɛ a wɔde yɛ ntama a wɔde yɛ ntama no mu nsakrae a ɛyɛ fɛ a wɔde yɛ krataa no afã a ɛyɛ den no hyɛ nkuku no ano.

3. Nneɛma a wɔde yɛ ne nea ɛma onwini .

·Mmiɛnsa roll kalenda:

·Core function: Wɔ PET ho no, adwuma titiriw a rollers abiɛsa no yɛ ne onwini ntɛmntɛm. Ɛsɛ sɛ wɔde-temperature a ɛkorɔn (bɛyɛ 280℃C) PET melt a efi nkuku no mu ba no yɛ nwini ntɛmntɛm wɔ ne glass transition temperature (TG) ase na ama wɔatumi asiw crystallization ano na wɔanya apet nkratafa a ɛyɛ mmerɛw kɛse, a ɛnyɛ crystalline.

·Roller Temperature Control: Wɔtaa hyehyɛ rollers abiɛsa tẽẽ anaasɛ wɔ digrii 45. Mfinimfini rola no yɛ roller a ɛyɛ pintinn, na nea ɛwɔ soro ne nea ɛwɔ fam no yɛ rollers a wotumi sesa. Nsu a ɛma ɛyɛ nwini daa wɔ roller no mu, na ɛho hia sɛ wɔhwɛ ɔhyew so pɛpɛɛpɛ.

·Surface effect: Sɛ wode ahwehwɛ rollers di dwuma a, ebetumi anya nkratafa a ɛyɛ mmerɛw, bere a sɛ wode frosted rollers di dwuma a, ebetumi ama woanya matte sheets.

4. Traction, thickness susuw ne winding nhyehyɛe .

·Traction Unit: Ɛyɛ cooling rollers pii ne rɔba traction rollers, na ɛkyerɛ krataa no kwan yiye fi roller afiri abiɛsa no mu na ɛma ɛyɛ nwini bio.

·Online thickness gauge (beta ray anaa infrared): Wɔ traction nhyehyɛe no mu no, non{0}}contact thickness gauge no kɔ so scan krataa no trɛw nyinaa na ɛma ankasa-bere ho mmuae wɔ thickness data so. Saa nhyehyɛe yi betumi abata lip hot bolt adjustment nhyehyɛe no ho na ama wɔanya automatic thickness control (ATC), a ɛhwɛ thickness tolerance so wɔ ± 2-3% mu.

·Edge twitwa afiri: Twitwa nwura ano a ɛyɛ den a ɛwɔ krataa no afã abien no nyinaa.

·Winder: Sɛ wɔfa mfinimfini/afa so winding anaa turret type dual station winding machine, tension control system no ho hia kɛse na ama wɔatumi ahwɛ ahu sɛ coil no nhyɛso a ɛkɔ so daa, a nwi a ɛyɛ nwi anaasɛ ntini a ɛretrɛw no nni hɔ.

5. Edge nneɛma a wɔde yɛ nneɛma foforo .

·Wɔde intanɛt so afiri a wɔde yiyi nneɛma mu no bubu nneɛma a wɔde ayɛ nwura no mu asinasin ntɛm ara, na afei wɔde kɔ so fra mu san kɔ ɔkwan titiriw a wɔfa so ma ɛyow no mu denam aduan a wɔde ma a ɛne no hyia so wɔ ɔkwan pɔtee bi so (te sɛ 10% -30%), wɔde nneɛma foforo fra mu, na wɔsan de di dwuma bio, ɛtew ɛka so kɛse.

Ɔkwan titiriw a wɔfa so yɛ: CPET a wɔyɛ no .

Nneɛma a wɔyɛ ma ɔhyew-cPet nkratafa a ɛko tia (a wɔde di dwuma ma microwave/oven trays) no hwehwɛ sɛ wɔde crystallization nnwinnade foforo ka ho.

·Ɔkwan a wɔfa so yɛ: Owura yɛ apet ntama a ɛyɛ mmerɛw na ntɛm ara ɔde fa intanɛt so ɔhyew fononoo mu. Wɔde krataa no yɛ hyew ma ɛyɛ hyew kodu PET (~160-180℃C), a ɛsakra no fi amorphous tebea mu kɔ crystalline tebea mu na ɛbɛyɛ opaque/milky white cPet krataa. Wobetumi ama ne hyew a ɛko tia ɔhyew no akɔ soro kɛse akodu digrii 220 c.

·Saa nkyerɛwde yi ne crystallization ɔfa bi a wɔde bɛka ho wɔ APET a wɔyɛ no akyi no yɛ pɛ.

·Ɛsɛ sɛ drying system no yɛ core: a high{}}quality dehumidification and drying system no, ɛsɛ sɛ wode to hɔ, a ɛyɛ ade a ɛsɛ sɛ wodi kan yɛ ansa na wɔayɛ PET nkrataa a ɛfata.

·Ahwehwɛdeɛ a ɛkɔ soro pɛpɛɛpɛ: Ahwehwɛdeɛ a ɛfa thickness uniformity, transparency, ne surface quality ho no yɛ kɛseɛ paa, enti gear pumps, online thickness gauge ATC systems, ne nea ɛkeka ho no taa yɛ nhyehyɛɛ a ɛhia, sikasɛm ho ka a ɛkɔ soro.

·Nneɛma a ɛyɛ mmerɛw a ɛyɛ mmerɛw: Wɔde ahwehwɛde ahorow a ɛkorɔn si nneɛma a wɔde yɛ nneɛma a ɛyɛ papa (titiriw no, RPET ahotew ne nsu a ɛyɛ hyew) ne sɛnea nneɛma a wɔyɛ no gyina pintinn no so.

·Ahoɔden a wɔde di dwuma: Nneɛma a ɛma ɛyow ne nea ɛkɔ mu no nyinaa hwehwɛ ɔhyew a ɛkɔ soro, na ɛde ahoɔden a wɔde di dwuma kɛse ba.

PET Sheet Extrusion Machine Line no yɛ mfiridwuma ho nimdeɛ a ɛkɔ so yɛ adwuma a ɛkɔ so, na ne titiriw no da:

1. Ultimate Drying: Dehumidification ne drying nhyehyɛe a ahoɔden wom ne fapem koraa a wɔde hwɛ hu sɛ nneɛma no yɛ papa.

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3. Pɛpɛɛpɛɛyɛ ne control: Mmiɛnsa roll rapid cooling process no na ɛkyerɛ transparency ne mfitiaseɛ adwumayɛ wɔ krataa no mu, berɛ a intanɛt so thickness measurement ne automatic feedback system (ATC) hwɛ ma adeɛ no mu duru yɛ pɛpɛɛpɛ koraa.

Afiri a wɔde yi PET krataa a wɔpaw no a wobɛpaw no yɛ nhyehyɛe a ɛyɛ adwuma ankasa a ebetumi adi ɔhyew, nhyɛso, nsu, ne nhyɛso so pɛpɛɛpɛ ankasa.

PET yɛ ade a wɔde hyɛ nsu mu. Wɔ wim tebea mu no ɛtwetwe nsu a ɛyɛ nwini. Wɔ extrusion adeyɛ no mu no humid ade no hyɛ hydrolysis nnuru reaction a ɛka mfiridwuma su a extruded foil. Esiane eyi nti, ɛsɛ sɛ mfiridwuma a wɔtaa de di dwuma no ma nneɛma no yow denam tumi a wɔde di dwuma kɛse so.

Sɛ yɛde Conin a etwa to a ɛyɛ twin screw extruders no di dwuma a, yebetumi aboa ma yɛakwati sɛ ɛbɛyow na yɛayi afieboa nneɛma, pellets ne flakes no nyinaa afi mu. Wɔde nsuo a ɛyɛ nwini no sie-afiri vacuum afiri a ɛfata a wɔde ahyɛ extruder no so ma enti ɛkwati anaasɛ ɛtew hydrolysis process aba no so.

1. Sɛ wode twin screw solution di dwuma a, wubetumi ayi pre-drying system ne crystallization nhyehyɛe no afi hɔ. Eyi bɛma ahoɔden no 30% akora so.

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3. Na Conin Special Super vacuum nhyehyɛe ne screw nhyehyɛe a ɛfata, yebetumi adi IV drop no so wɔ acceptable range mu, mpɛn pii no 0.03 gyina nsu a ɛwɔ mu no so.

4. Sɛ wode twin screw di dwuma a, wubetumi de extruder tumi no adi dwuma koraa. Bere a single screw extruder wɔ mmirikatu ahoɔhare a ɛba fam koraa no, wobɛhwere ahoɔden pii na ama woanya output koro no ara.

Tags a ɛyɛ hyew .: Pet Sheet Extrusion Machine Line, China Pet Sheet Extrusion Mfiri a Wɔde Yɛ Nneɛma, Wɔn a Wɔde Ma, Adwumayɛbea .