Kupanga Kopanda Halogen Yopanda Moto Wosatha wa TPU Coating System Pogwiritsa Ntchito DMF Solvent

Kupanga Kopanda Halogen Yopanda Moto Wosatha wa TPU Coating System Pogwiritsa Ntchito DMF Solvent

Pa makina opaka a TPU omwe amagwiritsa ntchito Dimethyl Formamide (DMF) ngati chosungunulira, kugwiritsa ntchito aluminium hypophosphite (AHP) ndi zinc borate (ZB) ngati zoletsa moto kumafuna kuwunika mwadongosolo. Pansipa pali dongosolo lowunikira mwatsatanetsatane ndi kukhazikitsa:

I. Kusanthula Kotheka kwa Aluminium Hypophosphite (AHP)

1. Njira Yotetezera Moto ndi Ubwino

• Njira:
• Imawola kutentha kwambiri kuti ipange phosphoric ndi metaphosphoric acid, zomwe zimapangitsa kuti pakhale ma char mu TPU (condensed-phase flame retardncy).
• Amatulutsa ma PO· radicals kuti asokoneze kayendedwe ka kuyaka (gas-phase flame retardncy).
• Ubwino:
• Yopanda halogen, utsi wochepa, poizoni wochepa, yogwirizana ndi RoHS/REACH.
• Kukhazikika kwa kutentha (kutentha kwa kuwonongeka ≈300°C), koyenera njira zowumitsira za TPU (nthawi zambiri <150°C).

2. Mavuto ndi Mayankho Ogwiritsa Ntchito

3. Kapangidwe ndi Njira Yoyenera

• Chitsanzo cha kapangidwe kake:
• Maziko a TPU/DMF: 100 phr
• AHP yosinthidwa pamwamba: 20 phr
• Zinc borate (ZB): 5 phr (kugwirizana kwa utsi)
• Dispersant (BYK-110): 1.5 phr
• Mfundo Zofunika pa Njira:
• Sakanizani AHP ndi dispersant ndi partial DMF pansi pa high shear (≥3000 rpm, 30 min), kenako sakanizani ndi TPU slurry.
• Kuumitsa pambuyo popaka utoto: 120-150°C, onjezerani nthawi ndi 10% kuti muwonetsetse kuti DMF imatulutsa mpweya wonse.

II. Kusanthula Kotheka kwa Zinc Borate (ZB)

1. Njira Yotetezera Moto ndi Ubwino

• Njira:
• Amapanga galasi la B₂O₃ kutentha kwambiri, kutseka mpweya ndi kutentha (kuchedwa kwa moto wozizira).
• Amatulutsa madzi omangika (~13%), kuchepetsa mpweya woyaka ndikuziziritsa makinawo.
• Ubwino:
• Mphamvu yogwirizana kwambiri ndi AHP kapena aluminium trihydroxide (ATH).
• Kuletsa utsi bwino kwambiri, koyenera kugwiritsidwa ntchito pochotsa utsi wambiri.

2. Mavuto ndi Mayankho Ogwiritsa Ntchito

3. Kapangidwe ndi Njira Yoyenera

• Chitsanzo cha kapangidwe kake:
• Maziko a TPU/DMF: 100 phr
• ZB ya kukula kwa nano: 8 phr
• AHP: 15 phr
• Wonyowetsa (Tego 750W): 1 phr
• Mfundo Zofunika pa Njira:
• Nthambitsani ZB mu DMF kudzera mu kupukuta mikanda (kukula kwa tinthu ≤2μm) musanasakanize ndi TPU slurry.
• Wonjezerani nthawi youma (monga mphindi 30) kuti mupewe chinyezi chotsalira chomwe chingasokoneze kuchedwa kwa moto.

III. Kuwunika kwa AHP + ZB System mogwirizana

1. Zotsatira Zotsutsana ndi Moto Zogwirizana

• Kugwirizana kwa Gawo la Gasi ndi Gawo Lofupikitsidwa:
• AHP imapereka phosphorous kuti igwiritsidwe ntchito poyaka, pomwe ZB imakhazikika pa char layer ndikuletsa kuwala kwa afterglow.
• LOI yophatikizidwa: 28-30%, UL94 V-0 (1.6mm) ingathe kukwaniritsidwa.
• Kuletsa Utsi:
• ZB imachepetsa kutulutsa utsi ndi >50% (Cone Calorimeter test).

2. Malangizo Olinganiza Magwiridwe Antchito

• Malipiro a Katundu wa Makina:
• Onjezani 2-3% TPU plasticizer (monga polycaprolactone polyol) kuti musunge kusinthasintha (kutalika >300%).
• Gwiritsani ntchito ufa wa ultrafine (AHP/ZB <2μm) kuti muchepetse kutayika kwa mphamvu yokoka.
• Kulamulira Kukhazikika kwa Njira:
• Sungani kukhuthala kwa slurry pa 2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) kuti muphimbe mofanana.

IV. Kuyerekeza ndi Zoletsa Moto Zamadzimadzi Zochokera ku Zosungunulira

V. Njira Zoyenera Kutsatira

1. Kuyesa kwa Labu:

• Yesani AHP/ZB payekhapayekha komanso mophatikizana (kukweza kwa ma gradient: 10%, 15%, 20%).
• Yesani kukhazikika kwa kufalikira (palibe kusungunuka kwa madzi pambuyo pa maola 24), kusintha kwa kukhuthala, ndi kufanana kwa utoto.

1. Kutsimikizira kwa Pilot-Scale:

• Konzani bwino momwe zimakhalira zouma (nthawi/kutentha) ndikuyesa kuchedwa kwa moto (UL94, LOI) ndi mphamvu zake.
• Yerekezerani ndalama: Ngati AHP+ZB ichepetsa ndalama ndi >30% poyerekeza ndi madzi FRs, ndiye kuti ingakhale yothandiza kwambiri.

1. Kukonzekera Kukulitsa:

• Gwirizanani ndi ogulitsa kuti mupange ma AHP/ZB masterbatches omwe adasamutsidwa kale (ochokera ku DMF) kuti apange mosavuta.

VI. Mapeto

Ndi njira zoyendetsera kufalikira, AHP ndi ZB zitha kukhala zoletsa moto zothandiza pakuphimba TPU/DMF, pokhapokha ngati:

1. Kusintha kwa pamwamba + kufalikira kwa kudulidwa kwakukuluimagwiritsidwa ntchito poletsa kusonkhana kwa tinthu tating'onoting'ono.
2. AHP (yoyamba) + ZB (synergist)zimayesa bwino ntchito komanso mtengo wake.
3. Kwakuwonekera bwino/kusinthasintha kwakukuluNgati mukufuna, phosphorous-nitrogen FRs yamadzimadzi (monga Levagard 4090N) idzakhalabe yoyenera.

Sichuan Taifeng New Flame Retardant Co., Ltd. (ISO & REACH)

Email: lucy@taifeng-fr.com