PTFE Emulsion Quality Test Dan: Core Indicators & Methods 6 te chu a hnuaia mi ang hian a ni

Views: 0 Author: Site Editor A chhuah hun: 2026-05-27 A chhuahna: Hmun

PTFE emulsion – PTFE dispersion tia hriat bawk – hi fiberglass puan siam chhuahna atana coating raw material a ni PTFE high-temperature fabric , tape, leh belt te a awm bawk. Emulsion quality off a nih chuan final product hian non-stick performance a nei tha lo ang a, uneven coating a nei ang a, a hmaa a chhiat phah ang.

Mahse engtin nge PTFE emulsion batch khat chu a tha em tih i hriat theih ang? I test a ni.

Aokai PTFE hian kum tam tak chhung chu PTFE emulsion hi a lo hmang tawh a, a lo test tawh bawk. He guide hian core testing indicator paruk – solid content, pH, particle size, viscosity, stability, leh appearance – te chu standard method leh acceptance criteria te nen a huam a ni.

Solid Content – A bulpui ber a ni

Solid content hian product performance leh application economy a nghawng nghal vek a (coating thicker zawkah chuan solids sang zawk a ngai).

Test dan tlangpui: 1.1.

Tihdan	Zawm tur	Best For
Gravimetric (Oven) hmanga tih dan	Quantitative sample chu 120-150°C-ah a rit zawngah vawt rawh; solid content chu mass difference hmangin chhut rawh	Classic, khawvel pum huapa hman theih, lab standard
Hydrometer hman dan tur	Glass hydrometer hmangin teh (range 1.400-1.600, dikna ±0.001); specific gravity-solid content calibration curve hmangin a inthlak danglam thin	On-site production testing awlsam tak, rang tak a ni
Non-Volatile Matter hmanga thil tih dan	Moisture leh surfactant te chu temperature sang zawk (eg, 380°C) ah volatilize la; surfactant awm zat pawh a tichiang bawk	Surfactant analysis a ngaih hunah

A pawm dan tur tehfung: 1.1.

Per standard T/FSI 067-2021: PTFE concentrate impregnated nawn leh tur atan solid content mamawh chu 60±2% a ni.
On-site control standard dik tak: 60±0.5% (coating awm reng tur chuan tolerance khauh zawk)

PTFE_Emulsion_Solid_Content_Test.jpg tih hi a ni

pH Value – A dinhmun a nghet tih hriattirna

pH value hian storage stability, corrosiveness, leh material dang nena inmilna a nghawng a ni.

Test dan: Glass Electrode Method (Direct Determination) – pH meter hmanga teh tur a ni a, glass electrode chu point hnih emaw point thum emaw calibration hmanga calibration a ni. Hei hi standard method hman tlanglawn ber a ni.

A pawm dan tur tehfung: 1.1.

T/FSI 067-2021 khatah: pH 9.0 – 11.0 inkar a ni
pH inthlak danglamna hian system instability emaw chemical reaction a awm tih a tilang fo thin (eg, hydrolysis of surfactant) .
Emulsion chemical stability tehna atan pH inthlak danglamna hun rei tak chhunga tracking hi a pawimawh hle

pH a pawimawh chhan: PTFE emulsion te hi fluorinated surfactants hmanga stabilized a ni a, chu chu a thawh that theih nan alkaline condition (pH > 8) a ngai a ni. pH 8 aia hniam a nih chuan emulsion chu a coagulate thei.

Aokai PTFE chuan drum lo lut apiangah pH test vek tur a ni a, thla tin dahkhawm laiin pH test vek tur a ni. Kar hnih chhunga 10.2 atanga 8.5 a tlahniam nghal chuan emulsion chu a destabilizing tih a tilang a, hman nghal tur a ni emaw, hnawl tur a ni.

Particle Size & Particle Size Insem dan

PTFE primary particles te size leh distribution uniformity hian film siamna property, permeability, leh final product performance-ah nghawng pawimawh tak a nei a ni.

Test dan tur: 1.1.

Tihdan	Thurin (Principle) a ni	A tehna Range	Best For
Laser hmanga thil tih theih	Laser scattering angle hi particle size nen a inzawm tlat a ni	Submicron atanga millimeter thleng a ni	A tlangpuiin, a rang ber, a zau ber
Dynamic Light Scattering (DLS) hmanga thil tih theih a ni.	Hun kal zelah scattered light intensity inthlak danglamna a zirchiang thin	Submicron leh nanoscale a ni	Primary particle, dilute dispersions te chu a awm a
Scanning Electron Microscopy (SEM) hmanga thil tih a ni.	Direct imaging – emulsifier chu sodium hexametaphosphate solution hmangin thlak la, a vawt laiin agglomeration a awm loh nan	Resolution sang tak a ni	Morphology chipchiar tak, tehna dik tak

Evaluation chhinchhiahna pawimawh tak takte:

D50 (median diameter) – PTFE emulsion atana hman dan tlangpui: 0.1-0.3 microns
Particle size distribution width – a tawi zawk hi consistent coating atan a tha zawk
D10 leh D90 – hian a sem darh dan a tarlang

Acceptance guideline: Coating hman tam zawkah chuan D50 hi 0.15 leh 0.25 μm inkar a ni tur a ni a, 90% chu mean atanga ±0.1 μm chhungah a awm tur a ni.

Viscosity – Processing hman dan tur

Viscosity hian flow behavior a tarlang a, coating leh impregnation process te chu direct takin a nghawng a ni.

Measure dan tlangpui: 1.1.

Tihdan	Thurin (Principle) a ni	A remchan dan tur
Rotational Viscometer hmanga teh a ni	Rotor resistance hmangin dynamic viscosity a teh thin	A tlangpui ber – Newtonian leh Newtonian ni lo fluid tan a thawk
Capillary Viscometer hmanga chhut a ni	Capillary kal tlanga luang chhuah hun a teh thin	Viscosity hniam tak tak te
Cone-Plate hmanga siam Viscometer a ni	Shear performance dik tak thlirletna	Viscosity sang tak nei fluid, rheological curve te a awm bawk
Rheology kimchang tak a ni	Shear stress-shear rate, thixotropy, yield stress, G’ leh G'' te hi a awm lo.	Processing mamawhna a mamawh hunah

A pawm dan tur tehfung: 1.1.

T/FSI 067-2021 khatah: Viscosity range 12.0 – 30.0 mPa·s (25±1°C-ah) a ni.
Viscosity a hniam lutuk → uneven coating, a tla
Viscosity sang lutuk → fiberglass chhunga lut tha lo, dilution a ngai

Practical note: Fiberglass fabric dip coating atan chuan target viscosity hi a tlangpuiin 15-20 mPa·s a ni. Viscosity a drift chuan deionized water hmangin siamrem (a hniam theih nan) emaw thickener dah la (a tihsan theih nan).

Stability Evaluation – Thil dahkhawm leh phurh chhuah rintlak

Stability assessment hian emulsion chu dahkhawm leh phurh chhuah laiin a inang tlang reng tih a tichiang a ni. Hun rei tak chhunga thil awm dan simulate nan accelerated testing method hman a ni.

Test dan tur	Dinhmun	Eng nge A Simulate
Centrifugal a awm theihna tur a ni	1000-5000 rpm chhung minute 30-120 chhung; delamination/sedimentation enfiah rawh	Tar chak lutuk – hmanraw hman tlanglawn ber
Thermal Stability a awm thei	40-60°C ah darkar 24-72 chhung dah a ni	Temperature sang takah dahkhawmna
Freeze-Thaw a nghet thei ang bera awm	-20 atanga -10°C-ah freeze la, 25°C-ah thaw rawh; cycle 3-10 vel tih leh tur a ni	Thlasik chhunga truck lum lo hmanga phurh chhuah
Storage Stability a awm thei	4-40°C-ah thla 1-12 chhung a awm a; key indicator te chu a hun hunah test thin ang che	Shelf life tangkai tak chu ruat rawh
Mechanical lama a dinhmun a nghet thei	High-speed shearing hmanga tihfai theihna; test particle size/viscosity inthlak danglamna	Pumping, mixing, high-shear coating te pawh a awm bawk

Pass/fail dan tur tehfung:

Delamination, sedimentation, gel formation hmuh tur a awm lo
Viscosity inthlak danglamna chu a tir atanga < 10% a ni
Particle size D50 inthlak danglamna < 15%

Shelf life guidance: A dah that (10-30°C, sealed) hnuaiah chuan PTFE emulsion hian thla 6-12 chhung a stability a vawng reng thin. Centrifuged test-ah >5% sediment a awm chuan batch chu paih vek tur a ni.

A rilru a hah lutuk chuan a rilru a buai em em a.png

A lan dan enfiah – Quick Batch Consistency Check

Natural light hnuaiah sample chu mitin enfiah rawh.

A lan dan pawmtlak: Emulsion dum emaw, sen hring emaw, uniform, thil danglam lo awm lo, delamination, gel lumps, vun siam, emaw, ruahtui tla chiang tak.

Eng nge en tur:

Darkening → contamination emaw thermal degradation emaw awm thei
Vun chunglam → a vawt emaw, a then a coagulation emaw
Lumps emaw grit emaw → coagulated polymer (tha lo) .
A chungah tui thianghlim → sedimentation a awm tawh

Thupui – A hman dan azirin Test Methods thlang rawh

I nih chuan...	Heng test-te hi ngaihtuah ber rawh	Zinzia
Raw material lo lutte endik a ni	Solid awm zat, pH, viscosity, a lan dan	Batch tin
Production quality control a ni	Solid awm zat (hydrometer), viscosity (rotational), pH	Nitin emaw shift khatah emaw
Coating process siam chhuah	Particle lian leh te, rheology, stability te	Per formulation tihdanglam a ni
Supplier thiamna nei tur a ni	Paruk zawng zawng + freeze-thaw + hun rei tak chhunga dah theih	Quarter tin emaw kum tin emaw
Hlawhchhamna thlirletna	SEM particle imaging + a huam zau zawnga stability	A tul angin

A chunga kan tarlan te hi Jiangsu Aokai thil thar siam chhuahna Co., Ltd.

Kan thil siam zawng zawng, Teflon high-temperature cloth, Teflon high-temperature tape, Teflon high-temperature mesh belt, seamless fusing machine belt, single-sided PTFE puan, high-temperature resistant conveyor belt, leh high-temperature te pawh a tel a, chu chu kan product hrang hrangte tana parameter kimchang, application scenario, leh customization solutions te hriat belh i duh chuan resistant fiberglass cloth , a hnuaia mi ang hian min rawn biak theih reng e: