Siab -Tub kub PCB Labels 101: Txhua Yam Koj Yuav Tsum Paub Txog Thaum Tshav Kub-Resistant Circuit Board Marking

Cov ntawv luam tawm Circuit Court boards dhau los ntawm cov cua sov thaum lub sij hawm soldering -feem ntau tshaj 200℃. Cov ntawv qub qub tsis tuaj yeem muaj sia nyob qhov no. Lawv shrink, discolor, poob adhesion, los yog ua tsis tau nyeem. Yog tias koj ua haujlwm hauv kev tsim khoom siv hluav taws xob, koj xav tau cov ntawv sau uas tuaj yeem tswj tau cov cua sov.

Phau ntawv qhia no hais txog qhov tseem ceeb ntawmHigh-temperature PCB daim ntawv lo: lawv yog dab tsi, ob qib tseem ceeb txawv li cas, thiab xaiv qhov zoo rau koj cov txheej txheem tshwj xeeb.

Cov ntawv txheem lossis cov ntawv sau polyester tsis yog tsim rau kev kub nyhiab. Thaum raug tshav kub, lawv:

• Ntws thiab distort, ruining barcodes thiab ntawv nyeem
• Poob nplaum tuav, bubbling los yog tev tawm
• Tig daj los yog xim av, txo qhov sib piv rau scanning
• Ua nkig thiab tawg

Tshaj li cua sov, PCBs kuj ntsib cov fluxes, cov kuab tshuaj, thiab tshuaj ntxuav cov tshuaj uas tawm tsam cov ntawv zoo tib yam. Qhov tshwm sim yog ploj traceability, rework, thiab ua raws li kev pheej hmoo. Rau cov tuam txhab uas vam khom rau kev taug qab, siv cov ntawv tsis raug tsis yog qhov kev xaiv.

High-temperature PCB daim ntawv lo yog tsim tshwj xeeb los tiv thaiv cov txheej txheem zoo li reflow thiab yoj soldering, nrog rau cov tshuaj hnyav hnyav. Lawv muab peb lub ntsiab lus tseem ceeb:

1. Cov khoom siv ntsej muag kub-resistant (yuav luag ib txwm polyimide)
2. Ib daim nplaum nplaum uas txuas los ntawm tshav kub thiab tshuaj lom neeg
3. Ib qhov chaw luam tawm uas khaws cov barcodes thiab cov ntawv nyeem tau yooj yim

Txoj kev sib xyaw ua ke kom ntseeg tau tias muaj kev txheeb xyuas los ntawm kev tsim khoom mus txog rau qhov khoom kawg.

Tsis yog tag nrho cov ntawv kub kub PCB yog tib yam. Hauv kev xyaum, ob qib sib txawv ua lag luam, txhua tus tsim rau qib sib txawv ntawm thermal stress.

Txheem Qib: Acrylic-Adhesive Polyimide Labels

Qhov no yog lub workhorse ntawm PCB daim ntawv lo, siv li ntawm 90% ntawm reflow soldering daim ntaub ntawv. Nws siv aruaj khov acrylic nplaumntawm polyimide zaj duab xis.

Kev khiav hauj lwm kub tsis tu ncua:

• Kev siv ruaj khov: -40℃rau 175 degree
• Lub sij hawm ntev ci (teev mus rau ntau pua teev): ruaj khov mus txog 150-180 degree. Tshaj li qhov no, cov nplaum yuav muaj hnub nyoog, tig daj, lossis tawm cov khoom seem.

Peak kub tsis kam (lead-free reflow standard):

• Cov txheej txheem txheem: 260℃rau 5-6 feeb - tsis muaj kev nqa, tsis muaj kev tso tawm, tshem tawm barcodes, tsis muaj nplaum nplaum.
• Lub sijhawm luv luv: 280℃txog li 90 vib nas this - daj daj me ntsis thiab cov ntshav me me tuaj yeem tshwm sim dhau qhov no.

Qhov zoo tshaj plaws rau kev siv:
Cov khoom siv hluav taws xob siv hluav taws xob, lub xov tooj ntawm tes motherboards, tus qauv SMT reflow, ib zaug dhau qhov cub txheej txheem.

Qib hwm: Silicone-Adhesive Polyimide Labels

Tsim los rau ib puag ncig uas xav tau tshaj plaws, qib no siv asilicone-raws li nplaum nplaumuas tuav nws daim ntawv cog lus ntawm qhov kub thiab txias ntau dua thiab los ntawm ntau lub voj voog cua sov.

Kev khiav hauj lwm kub tsis tu ncua:

• Sustained siv: -73℃mus rau 260 degree, nrog rau lub sij hawm ntev stability ntawm 180-220℃tsis laus los yog degradation.

Peak kub kuj:

• Peak kam rau ua: 300℃rau 60-90 vib nas this - muaj sia nyob ntau qhov rov qab hla thiab cua kub rov ua haujlwm yam tsis muaj teeb meem.
• Instant heev: 320-350℃rau luv luv kev sib cuag (xws li, lub zos soldering hlau los yog tin da dej) - daim ntawv lo nyob twj ywm.

Qhov zoo tshaj plaws rau kev siv:
Automotive PCBs, hwj chim boards, tub rog electronics, ntau reflow cycles, kub-cua rework, ntev-lub sij hawm high-temperature khoom.

Nug koj tus kheej cov lus nug tseem ceeb no:

1. Koj qhov kub thiab txias npaum li cas yog dab tsi?

Rau cov qauv txhuas-dawb reflow ntawm 260℃rau 5-6 feeb, cov qib acrylic yog txaus. Yog tias koj cov txheej txheem siab tshaj 260℃lossis yuav tsum tau nyob ntev dua, lossis yog tias koj ntsib 280℃peaks, xav txog qib silicone.

2. Daim ntawv lo puas yuav dhau los ntawm ntau lub voj voog rov qab?

Ib leeg-pass boards tuaj yeem siv acrylic. Yog tias koj lub rooj tsavxwm dhau los ntawm kev rov qab ntau dua ib zaug, lossis yog tias koj xav tau cov cua kub ua haujlwm, cov nplaum silicone yog qhov kev xaiv zoo dua - nws tswj kev ncaj ncees los ntawm kev rov ua cua sov dua.

3. Yam tshuaj twg yuav ntsib?

Ob leeg nplaum tiv taus cov kuab tshuaj thiab ntxuav cov kuab tshuaj, tab sis silicone muaj kev tiv thaiv zoo tshaj plaws rau cov tshuaj board-ntxuav cov tshuaj phem thiab raug rau cov roj thiab roj mus ntev (feem ntau hauv tsheb).

4. Koj xav tau dab tsi loj thiab hom?

PCB qhov chaw yog txwv. Cov ntawv sau tuaj ntau qhov ntau thiab tsawg, los ntawm me me (0.25 nti square) mus rau ntau hom ntawv. Xav txog qhov chaw muaj thiab qhov loj ntawm koj tus lej barcode lossis Data Matrix code.

5. Koj puas xav tau daim ntawv pov thawj?

Ntau daim ntawv thov yuav tsum tau txais kev pom zoo UL, MIL-STD-202G ua raws, lossis UL94 V-0 nplaim taws retardancy. Ob qib muaj nyob nrog cov ntawv pov thawj no, tab sis nco ntsoov xyuas cov ntaub ntawv cov khoom.

Thaum koj tau xaiv daim ntawv lo, ua raws cov lus qhia no kom tau txais txiaj ntsig zoo tshaj:

Ntxuav qhov chaw- Tshem tawm cov khoom seem, plua plav, thiab roj ua ntej siv daim ntawv lo.

Siv lub zog ruaj khov- Xyuas kom cov nplaum ua rau muaj kev sib cuag nrog lub rooj tsavxwm.

Siv thermal hloov luam ntawv- Qhov no tsim cov lej ruaj khov, tiv taus cua sov.

Muab cov ribbon rau daim ntawv lo- Ib txwm siv cov hlua uas cov chaw tsim khoom pom zoo.

Xav txog 600 dpi- Rau cov ntaub ntawv me me lossis QR cov lej, kev luam ntawv siab dua pab tswj kev nyeem tau.

1. Dab tsi yog qhov txawv ntawm acrylic-based thiab silicone-based polyimide ntawv?
Acrylic labels yog tus qauv rau 260℃reflow thiab siv ib zaug xwb. Cov ntawv silicone tiv taus siab dua (300 degree), ntau qhov rov qab, thiab ua haujlwm tas li 220 degree, ua rau lawv zoo tagnrho rau kev siv tsheb thiab tub rog.

2. Cov ntawv acrylic polyimide puas tuaj yeem tuav 280 degree?
Lawv tuaj yeem muaj sia nyob 280℃txog li 90 vib nas this, tab sis tej zaum yuav pom daj me ntsis los yog ntug nplaum los ntshav. Rau ntev dua los yog rov ua dua, silicone yog pom zoo.

3. Muaj pes tsawg lub voj voog rov qab tuaj yeem ua rau cov ntawv silicone zam?
Silicone-adhesive polyimide cov ntawv yog tsim los rau ntau qhov kev rov qab hla - feem ntau peb lossis ntau dua - tsis muaj degradation, thaum cov ntawv acrylic yog qhov zoo tshaj plaws rau cov txheej txheem ib zaug.

4. Cov ntawv no puas siv tau nrog cov hlau tsis muaj hlau?
Yog lawm. Ob qib yog tsim los rau kev rov qab tsis muaj hlau lead (260 degree). Cov qib acrylic yog cov qauv kev lag luam, thaum silicone muaj cov npoo ntxiv rau cov txheej txheem hnyav lossis rov ua dua.

5. Puas yog kuv ib txwm xav tau silicone nplaum rau tsheb PCBs?
Tsis yog ib txwm, tab sis nws yog qhov pom zoo. Automotive boards feem ntau ntsib ntau yam reflows, siab nyob rau hauv-hood kub, thiab raug cov roj - tej yam kev mob uas silicone ho outlass acrylic.