Wɔ saa asɛm yi mu no, yɛbɛkyerɛkyerɛ UV absorbers a wɔde di dwuma wɔ wavelength spectrum a ɛtrɛw no mu kɔ akyiri. Sɛnea asorɔkye tenten ahorow no kyerɛ no, wobetumi akyekyɛ hann a ano yɛ den mu ayɛ no nhama abiɛsa. UV A (400-315nm), UV B (315-280nm) ne UV C (280-180nm).
Efi nhama ahorow abiɛsa mu no, UV C ne UV B afã horow bi nkɔ Asase so da. Sɛ owia hann fa wim a, ozone, nsu a ɛyɛ hyew, oxygen ne carbon dioxide na ɛtwetwe. Nanso, sɛ yɛn nneɛma no kɔ owia hann mu a, UV A mframa ne UV B bi betumi anya nkɛntɛnso kɛse wɔ yɛn nneɛma no nkwa nna so.
Dɛn ne UV absorber?
Sɛnea edin no kyerɛ no, ɔkwan a wɔtaa fa so bɔ UV ho ban ne UV a ɛtwetwe nneɛma ka ho. Wɔtwe UV hann na ɛde ahoɔden kɔ. Bio nso, woyi ahoɔden fi mu anaasɛ wɔsɛe no sɛ ɔhyew anaasɛ asiane biara nni hɔ a ɛba fam-ahoɔden mframa.
Ultraviolet (UV) absorbers yɛ adwuma de bɔ plastic afã horow no mu ho ban fi UV mframa a epira ho. Saa nneɛma yi yɛ nea ɛyɛ den yiye wɔ UV absorption mu ne photostability a ɛkorɔn a ɛwɔ hɔ.
Sɛnea nnuru ahorow kyerɛ no, wɔkyekyɛ UV absorbers mu yɛ no salicylates, benzophennes, benzotriazoles ne triazines. Salicylate a wɔde di dwuma ne ne nkɔso no yɛ ntɛm, nanso ɛnyɛ den sɛ wobɛbrɛ ase wɔ hann a ano yɛ den a ano yɛ den ase, na ɛnyɛ den sɛ wobɛdan kɔkɔɔ.
Ne tiaatwa mu no, wɔntaa mfa nni dwuma mprempren. Sɛ́ ɔkwan foforo no, wɔayɛ triazine-a egyina ultraviolet absorbers so foforo wɔ nnansa yi mfe mu.
Sɛ wɔde toto benzopyrone ne benzotriazole UV absorbers ho a, ɛwɔ photostability a eye, ɛsua wɔ soro a ɛkɔ, absorption adwumayɛ a ɛkɔ soro, broad spectrum, low volatility ne dispersibility pa, na wɔde adi dwuma wɔ nnwuma ahorow mu. Fa wo ho hyɛ mu. te sɛ plastic, nneɛma a wɔde kata so, nnuru a wɔde yɛ ahosiesie ne nnwuma afoforo.
Mpɛn pii no, amine hann a ɛma ɛyɛ den a esiw kwan ne UV absorbers a wɔaka abom no da adwumayɛ a ɛne ne ho di nsɛ adi sen hann a ɛma ɛyɛ den no mu biara nkutoo. V .
Omnistab UV 1577 .
Omnistab UV 1577 yɛ hydroxyphenyl triazine UV a ɛtwetwe nsu. Biako ne mfaso a ɛwɔ nsakrae a ɛba fam koraa so, na biako nso yɛ nea ɛne polymer ahorow ahorow hyia yiye. Ɛkame ayɛ sɛ UV 1577 no twe hann a wotumi hu a ɛboro 400nm so. Nea ɛho hia sen biara no, kɔla a ɛyɛ kɔkɔɔ no nni nkɛntɛnso biara wɔ nea etwa to a wɔde di dwuma no so. Ɛno nti na ɛyɛ anigye titiriw ma transparent anaa light-colored materials a enni kɔla ho nsɛm.
Ɛwɔ processing stability a ɛkyɛn so esiane ne molecule mu duru kɛse nti. Sɛ wɔde toto benzotriazole UV absorbers ho a, triazines wɔ UV absorption ahoɔden a ɛyɛ den wɔ 300-380 nm nyinaa mu. Sɛ nhwɛso no UV 1577 yɛ adwuma yiye wɔ polycarbonate ne polyester a wɔde di dwuma mu. Nneɛma foforo a wɔde di dwuma ne polymer blends anaasɛ ogya a ɛmma ogya ntumi nhyew esiane sɛ ɛne ne ho hyia yiye nti.
Omnistab UV 1577 no wɔ hann a ɛkɔ soro denneennen wɔ UV-A ne UV-B (280-400nm) mu. Nea ɛka ho no, wɔda UV radiation absorption su ahorow a eye adi.
Ɛnam so no, nneɛma a wɔde yɛ polymer a wɔsɛe no wɔ ultraviolet radiation ase no so tew kɛse, na polymer products no som nkwa no kyɛ yiye. Wobetumi de UV absorber (omnistab UV 1577) adi dwuma wɔ synergistic kwan so a wɔde polymeric anaa phosphite antioxidants aka ho.
Di yɛn akyi wɔ LinkedIn so na woanya nsɛm foforo bere a wotintim nsɛm foforo no.
