Ɛbɛyɛ sɛ adwumayɛfo pii a wɔde wɔn ho hyɛ R&D anaa quality control mu no ahyia saa asɛm yi bere a wɔreyɛ incoming quality control (IQC) nhwehwɛmu no. Esiane sɛ mahwɛ mu mprenu nti, migye di sɛ ɛhwehwɛ sɛ wɔyɛ mu nhwehwɛmu kɔ akyiri.
Dɛn na "ada a wɔda no adi" kyerɛ? So ɛkyerɛ sɛnea ɛte nka bere a wɔresi dan no anaasɛ mfiri ahoɔden a ɛwɔ bere a wɔasa no yare awiei koraa no?
Nsonsonoe bɛn na ɛwɔ mu? 5% anaa 50%?
Sɛ wonni dodow ahye ne tebea pɔtee a wɔde di dwuma a, wontumi mmua asɛmmisa yi sɛ "yiw" anaa "dabi" kɛkɛ. Enti, yɛbɛtoa so tẽẽ afi mfiridwuma adwene mu akɔhwehwɛ asɛm a ɛfa "glue viscosity variation" ho no mu yiye. Nea ɛsɛ sɛ yɛhwehwɛ mu ne sɛ ebia saa nsakrae yi fi akwan a wɔfa so sɔ hwɛ mu a wɔtwe wɔn ho fi ho anaasɛ nneɛma mu nsakrae a efi awosu mu-ne huammɔdi asiane bɛn na nsakrae a ɛte saa betumi de aba wɔ nneɛma a wɔyɛ no so.
01 Sɛnea Viscosity Yɛ
Nanso sɛ yɛfa adwene foforo na yesusuw abɔde mu wiase a ɛyɛ microscopic a ɛwɔ polymers mu no ho a, ne titiriw no, viscosity yɛ adeyɛ a ɛyɛ nnam kɛse. Polymer nneɛma a ɛyɛ den no fi nneɛma abien mu titiriw: nea edi kan, nkitahodi a ɛto so abien a ɛda molecule nkɔnsɔnkɔnsɔn ntam (a van der Waals tumi ahorow, hydrogen nkitahodi, ne dipole bere a ɛba ntɛm ara mpo a efi ɛlɛtrɔnik mununkum a ɛnyɛ pɛpɛɛpɛ mu ba bere tiaa bi mu ka ho) nea ɛto so abien, honam fam nkyekyere a ɛwɔ nkɔnsɔnkɔnsɔn tenten-nhyehyɛe a ɛwɔ polymers mu, a ɛte sɛ ntaban a ɛyɛ tan a wɔabɔ mu wɔ ahunmu nyinaa. Sɛ yɛde macroscopic tumi-te sɛ thrust a efi dispensing valve anaasɛ shear force a ɛwɔ viscometer rotor-di dwuma de kanyan flow a, ne titiriw no yɛreyɛ mfiridwuma adwuma de adi saa intermolecular electromagnetic attractions yi so nkonim na yɛabubu saa honam fam nhama no.
"Mfinimfini friction tumi" a saa molecule nkɔnsɔnkɔnsɔn yi de ba bere a ɛrehwe ase no yɛ macroscopic a ɛda adi wɔ viscosity ho. Enti, viscosity nyɛ gluu parameter a atew ne ho na mmom ɛyɛ ne molecule nhyehyɛe ne ne molecule interactions ho nkyerɛkyerɛmu a edi mũ.
Eyi nso kyerɛkyerɛ nea enti a viscosity yɛ nea ɛyɛ mmerɛw kɛse wɔ tebea horow te sɛ ɔhyew, shear rate, ne bere-efisɛ saa nsusuwii ahorow yi sesa molecule ahorow no akwantu ne wɔn entanglement tebea tẽẽ.
02 Data bias taa fi sɔhwɛ ahye a ɛnsɛ mu.
Sɛ yɛsan kɔ yɔnko dwumayɛni no nsɛmmisa no so a, ade a wɔde nkata so akuwakuw abien no da ntini ahorow a ɛsono nea ɛyɛ den adi. Ansa na yebesusuw sɛ nneɛma mu sintɔ ahorow wɔ hɔ no, ɛsɛ sɛ yedi kan yi nneɛma a ɛtwetwe adwene fi sɔhwɛ akwan horow mu no fi hɔ. Esiane sɛ polymer nsu dodow no ara nyɛ -Newton nsu nti, ɛde ɔhye tebea a emu yɛ den yiye to sɔhwɛ so.
Abusuabɔ a ɛda ɔhyew ne polymer nkɔnsɔnkɔnsɔn afã horow a ɛkɔ baabiara ntam no di nkyerɛkyerɛmu nhyehyɛe bi akyi (sɛnea Arrhenius empirical law kyerɛ). Mpɛn pii no, ɔhyew a ɛwɔ baabi a wɔkora ntama so no mfinimfini yɛ digrii 20 , bere a ɔhyew a ɛwɔ dan a wɔde sɔ nneɛma hwɛ no mu yɛ digrii 25 .
Sɛ wɔamfa nhwɛsode no anhyɛ ɔhyew a ɛkari pɛ a ɛfata mu wɔ ɔhyew aguaree a ɛkɔ so daa mu wɔ nhwɛsode no akyi (a mpɛn pii no egye bɛboro simma 30) a, akyinnye biara nni ho sɛ nsɛm a wɔasusuw no bɛda akwanside kɛse adi. Ɔhyew a ɛsakra digrii 1 betumi ama nsunsuanso nsakrae a ɛyɛ 5% kosi 10% aba.
Shear Rate: Nneɛma pii a wɔde hwɛ sɛnea nneɛma te no bu wɔn ani gu sɛnea rotor model ne ahoɔhare a ɛkyinkyini no yɛ pɛpɛɛpɛ bere a wɔde batches toto ho no. Polymer nsu da su a ɛne "shear-thinning suban" adi.
Dodow a ahoɔhare a ɛkyinkyini no kɔ soro no, dodow no ara na molecule nkɔnsɔnkɔnsɔn no de ahoɔden kyerɛ baabi a ɛwɔ na wobue mu no yɛ kɛse, na ɛma ɛda adi sɛ nsu a ɛyɛ den a wɔsusuw no sua. Nea ɛho hia no, sɛ wɔresusuw nsu a ɛnyɛ-Newton de ho a, viscosity point a ɛwɔ ahoɔhare biako a ɛkyinkyini mu no taa yɛ nea ntease biara nni mu; nea ɛsɛ sɛ wɔde toto ho ne "shear stress–viscosity curves" a wonya wɔ shear rates ahorow mu.
Bere (Thixotropy): Wɔ nhyehyɛe ahorow a thixotropic nneɛma te sɛ fumed silica wom mu no, hydrogen bond network bi ba wɔ mu bere a wɔagye wɔn ahome (a ɛde viscosity kɛse ba), bere a saa network yi sɛe wɔ shear stress ase (na ɛde viscosity a ɛba fam ba).
Eyi te sɛ nea ankorankoro baanu si akan wɔ mita 100-mita mmirikatu mu no te sɛ nea: obiako awie ɔhyew-m nkyɛe na ɔkura nipadua tebea a eye sen biara mu, bere a ɔfoforo no atu mmirika anum a ɛtoatoa so dedaw na wɔn nipadua tebea nnya nnyaa ahoɔden ansa na wabɔ mmɔden sɛ obetu mmirika a ɛto so asia no. Ebia nsonsonoe a wɔahu wɔ nea etwa to a efi mu ba no renkyerɛ nsonsonoe ankasa a ɛwɔ tumi mu na mmom ebetumi afi nsakrae a ɛba wɔn tebea horow a na ɛwɔ hɔ ansa na-sɔhwɛ no mu ara kwa. Sɛ bere a wɔde twa ansa na wɔretwa anaasɛ bere a wɔde gye wɔn ahome no yɛ soronko wɔ nhwɛsode ahorow abien ntam ansa na wɔasɔ ahwɛ a, akenkan ahorow no bɛpaapae wɔ awosu mu. Enti, ɛho hia sɛ wɔkyerɛ pefee ansa na wɔasɔ bere tenten a ɛsɛ sɛ wɔde di kan twa ne bere a ɛsɛ sɛ wɔsusuw no ahwɛ. Sɛ wɔanhyehyɛ bere a ɛfata a, wontumi mfa data no ntoto ho yiye.
03 Dɛn na ɛyɛ nsonsonoe titiriw a wobebu no sɛ ɛnyɛ ne kwan so? Bere bɛn na ebetumi aka aduru no?
Ɛsɛ sɛ wodi kan gye tom sɛ polymerization nhyehyɛe no ankasa fi awosu mu yɛ nea ɛba kwa, na ɛma ɛnyɛ nokware sɛ wɔbɛhwehwɛ sɛ wɔkyekyɛ molecule mu duru a ɛyɛ pɛ koraa wɔ adhesive akuw nyinaa mu.
Mfiridwuma mu nsɛm a wɔtaa de di dwuma kyerɛ sɛ nsakrae a ɛba wɔ nsunsuanso mu wɔ ±10% kosi ±15% mu no hyɛ abodwokyɛre anohyeto a ɛfata mu.
Sɛ deviation no boro 20%–30% a, ahwɛyiye ho hia-eyi kyerɛ nsɛm a ebetumi aba wɔ base resin batch no ho anaasɛ thixotrop no apete a ɛnteɛ. Nneɛma bɛn na ebetumi afi mu aba a ɛte saa a wɔtwe wɔn ho fi ho no bɛba?
Egyina wo process window no so. Sɛ wode nsa anaa semi-automatically de adhesive gu so a, nsonsonoeɛ 20% a ɛwɔ viscosity mu no bɛtumi aka adwumayɛfoɔ no adwene wɔ texture ho nanso ɛnkyerɛ sɛ ɛbɛka bond ahoɔden a ɛtwa toɔ.
Wɔ nhama a wɔde ma a ɛnyɛ adwuma ho no, nsakrae a ɛba wɔ nsu a ɛyɛ den mu no nya ade a wɔde nkata so dodow so nkɛntɛnso tẽẽ. Wɔ nhyɛso ne bere tebea a ɛyɛ pɛ mu no, sɛnea ɛyɛ den kɛse no betumi asiw ade a wɔde nkata so no kwan sɛ ɛnsen yiye anaasɛ ɛbɛma nhama ayɛ no; sɛ ɛnyɛ den pii a, ebetumi ama ade a wɔde nkata so no ahwe ase anaasɛ atrɛw a wɔanhyɛ da. Eyi betumi asɛe nneɛma a wɔyɛ no nnyigyei. Ade a ɛho hia no gyina interface wetting a ɛfata so.
Viscosity a ɛkɔ soro no brɛ nsuo ase, na ɛmma adhesive no ntumi nkɔ micro-rough surface a ɛwɔ substrate no so koraa. Bere a wotumi hu bere a wɔde di dwuma no, nneɛma nketenkete pii a ɛwɔ baabi a ɛda ntam no wɔ hɔ. Wɔ adwennwen ase no, asiane a ɛwɔ interface delamination mu no kɔ soro kɛse. Ad: WorkBuddy AI Office Assistant – de di dwuma-a wontua hwee na ayɛ krado-sɛ wode -di dwuma. Sɔ WorkBuddy hwɛ mprempren. Bio nso, ahurututu betumi aba. Viscosity a ɛkɔ soro no brɛ nsuo ase, na ɛmma adhesive no ntumi nkɔ micro-rough surface a ɛwɔ substrate no so koraa. Bere a wotumi hu bere a wɔde di dwuma no, nneɛma nketenkete pii a ɛwɔ baabi a ɛda ntam no wɔ hɔ. Wɔ adwennwen ase no, asiane a ɛwɔ interface delamination mu no kɔ soro kɛse. Ad: WorkBuddy AI Office Assistant – de di dwuma-a wontua hwee na ɛyɛ krado-sɛ wode -di dwuma. Sɔ WorkBuddy hwɛ mprempren. Bio nso, ahurututu betumi aba.
Sɛ ade a wɔde hyɛ mu no mu nwene kɔ soro a, ɛyɛ den sɛ wobeyi microbubbles a ɛkɔ mu bere a wɔrekanyan anaasɛ wɔrehyɛ mu ma no afi hɔ. Wɔ vacuum tebea mu mpo no, nhyehyɛe ahorow a ɛwɔ ahoɔden kɛse-taa kyere saa ahurututu yi. Sɛ wɔsa no yare a, saa ahurututu yi dane kɔ mmeae a nhyɛsoɔ wɔ mu, a wɔ anyinam ahoɔden a ɛwɔ ahoɔden a ɛkorɔn-mu no, ɛbɛtumi ama ne fã bi akɔ anaasɛ abubu tẽẽ.
[Mfiridwuma-Gyinaesi a egyina so-Ɔkwan a wɔfa so yɛ] Anammɔn abiɛsa-nhyehyɛe a wɔde bɛyɛ mfiridwuma-atemmu a egyina so ni:
1. Nea edi kan no, si so dua sɛ ebia abirabɔ no yɛ nokware anaa
Wɔde viscometer, rotor, ahoɔhare a ɛkyinkyini, ɔhyew, ne ahomegye ne bere tebea a ɛyɛ pɛ na ɛsusuw nhwɛsode ahorow abien bere koro mu. Sɛ nsonsonoe no nnu 15% a, ɛda adi kɛse sɛ ɛyɛ nsakrae a ɛfata. Sɛ nsonsonoe no boro 20% a, ɛsɛ sɛ wɔyɛ nhwehwɛmu foforo.
2. Afei ma yɛnsan nhwɛ wo process window no bio
Sɔhwɛ wɔ afiri a wɔde yɛ nneɛma no so: kyerɛ mframa nhyɛso a ɛwɔ hɔ mprempren, bere a wɔde di dwuma, afiri a wɔde ma no nnade no kɛse, ne sɛnea ɛyɛ den a wogye tom.
Sɛ nhwɛso no, sɛ wo mfiri no yɛ adhesive bere nyinaa wɔ viscosity range ±15% mu a, batch nsakrae rennya adwumayɛ so nkɛntɛnso. Nanso, sɛ tolerance window no yɛ teateaa a, ɛsɛ sɛ wo ne nea ɔde ma no yɛ adwene wɔ batch control gyinapɛn a emu yɛ den ho.
3. Awiei koraa no, hwehwɛ akwan horow a wɔfa so di nkogu no mu
Sɛ awiei koraa no, ade no twa dwumadi mu sɔhwɛ ahorow mu (sɛ nhwɛso no, ahoɔden a ɛtwetwe, nhyɛso a ɛko tia, onyin) wɔ nsakrae a ɛba wɔ viscosity mu akyi a, ɛkyerɛ sɛ nsakrae no hyɛ anohyeto a wogye tom mu. Sɛ batch bi da wetting a enye anaasɛ residual bubbles adi a, hwɛ viscosity nsakrae pɔtee no mu na fa dedicated internal control parameters si hɔ. Bere a viscosity a ɛyɛ den yɛ nea wɔpɛ no, nea ɛho hia kɛse ne sɛnea egyina pintinn sɛnea ɛsɛ wɔ wo tebea pɔtee a wode yɛ nneɛma mu.
Sɛ wobɛhwehwɛ asɛm no mu wɔ nhyehyɛe kwan so a, di kan yi mfomso a ɛwɔ susudua mu no fi hɔ, afei fa nhyehyɛe no nsusuwii toto ho wɔ beae a eye sen biara no, na awiei koraa no fa nea wɔahu yi bata huammɔdi nhyehyɛe ankasa ho-kwan yi siw sɛ wɔde akontaahyɛde bo biako bɛdaadaa wo. Sɛ woasan nso ahyia nsonsonoe wɔ adhesive data akuwakuw abien ntam anaasɛ dispensing volumes a ɛnhyia wɔ production line no so a, di saa kwan yi akyi.