Ifu ya polyimide ni ifu idasanzwe ikora cane-ikoreshwa biciye mu nzira yo gukora ifu ya polyimide polymer. Ishirwa mu rwego rw'ibikoresho vy'ubuhinga bishobora guhangana n'ubushuhe bwinshi, vy'agaciro kanini, kandi bikomeye.
Silikoni ifise ifu ni ifu ishobora gukomera ivuye mu gutera ifu ya silikoni (silica gel). Ni ivy’ikintu gikomeye gifise ubushobozi bwo gukingira, gukingira, guhangana n’ubushuhe, no guhangana n’ugukura.
Ivyo vyose biva mu mafuru yihariye akora cane, yerekana ubushobozi bwiza cane bwo guhangana n’ubushuhe, ubushobozi bwo gukingira urubeya, n’ubushobozi bwo kwikingira umuriro. Ariko rero, ziratandukanye cane mu bijanye n’imipaka y’ubushuhe, ubushobozi bwo gukomera, ubushobozi bwo gukomera, ugushikama kw’imiti, igiciro be n’ingene zikoreshwa. Polyimide (PI) irabereye cane mu bihe bikomeye cane nk’ubushuhe bwinshi cane, ubusa bwinshi, n’isuku ryinshi. Silicone, ku rundi ruhande, izwi cane kubera ubushuhe bwayo bwagutse-, ubudahinduka buhoraho bw’ugukomera, n’ubushobozi bwo gukorana n’ibinyabuzima, ivyo bikaba bituma ibereye cane mu bikorwa nk’ugukingira, gupfuka, no mu bikorwa vy’ubuvuzi.
I. Ibintu nyamukuru bahuriyeko
Ubushuhe-bushobora guhangana n’urubeya-bushobora guhangana n’urubeya: Ivyo bikoresho vyizimya bihuye n’ingingo ngenderwako za UL94 V-0, bikaba bitanga umwotsi mutoyi kandi bikaba bifise ubumara buke mu gihe c’uguturika, bikaba bituma ari vyiza ku bikorwa vy’umutekano mwinshi nk’ivy’indege, ivy’indege, n’inguvu nshasha.
Ubushuhe buke/ubukingira: Ahanini bufise ubuhinga bw’ingingo zifunze-bufise ubushuhe buke (PI hafi 0.02–0.04 W/(m·K), Silicone hafi 0.08–0.12 W/(m·K)), itanga ubushuhe bwiza cane.
Ugukomera kw’imiti: Ishobora guhangana n’umuyaga w’ikirere (ozone), umuco w’izuba (ultraviolet), ibintu vyinshi bishobora gutuma umubiri ugira ubushobozi bwo gukora, n’ibindi bihimba vy’umubiri bifise intege nke, ikaba ishobora gukomera cane mu bidukikije vyo hanze no mu nganda.
Ivyuma vy’umuyagankuba: ubushobozi bwo guhangana n’ijwi ryinshi, bibereye gukingira umuyagankuba n’umuyagankuba no gukingira.
Uburemere buke-uburemere buke: Uburemere busanzwe buva kuri 0.2 gushika kuri 0.8 g/cm3, buringaniza inkomezi n’ukugabanya uburemere.
2. Itandukaniro ry’ingenzi (Igereranyo ry’Ibikorwa)
1. Ukwihanganira ubushuhe (itandukaniro rikomeye cane)
imeza
igikogwa | Ifu ya poliimide (PI) | Ifu ya silikoni |
Ubushuhe bukomeza | -269°C gushika kuri 300°C (ubushuhe burengeye 400°C) | -60°C gushika kuri 200°C (gushika kuri 300°C mu bihe bigufi) |
guhangana n'ubushuhe buke | ivyiza (nta guca ibice ku-269°C mu mazi y'azote) | Ni vyiza (-60°C bigumya uburemere) |
Ubushuhe bwinshi bwo kwihanganira | Ni vyiza cane (gushikama ku 300°C mu kiringo kirekire) | Ni vyiza (gushikama igihe kirekire-ku 200°C) |
2. Ubuhinga n'Ugukomera
Ubukomezi bw’amamolekule y’ifu ya polyimide (PI) burakomeye, bufise igice c’-ubukomezi canke bukomeye. Igaragaza ubushobozi bwo guhangana n’ugukomera n’uguhinduka gukomeye kw’ibihe bidahera mu gihe co gukomera. Ariko rero, ivyo bimenyetso biratuma kandi ibikoresho vy’ifu ya PI bigira inkomezi nyinshi be n’ugushikama neza cane mu bijanye n’ingero.
Igipimo ca silikoni gifise ifu ni ikintu gikomeye cane -gifise ububabare bukeyi buhoraho (<10%) and rapid rebound (<0.5s). It is soft, resistant to repeated compression, and suitable for sealing and cushioning applications.
3. Ibiranga imiti n'ibidukikije
PI foam yerekana ubushobozi bwo guhangana n’imiti, ishobora guhangana n’aside zikomeye, alkali zikomeye, ibintu biva mu binyabuzima be n’imishwarara. Ikindi kandi, yerekana ko gaze isohoka ari nto cane (TML .<1%), making it suitable for high-vacuum and cleanroom applications.
Silikoni y’ifu yerekana ubushobozi bwiza cane bwo gukorana n’ibinyabuzima, kuko idatera ubumara, ibiribwa -ishobora gukorana n’abantu, kandi ikaba ishobora gukoreshwa mu buvuzi; kandi yerekana ubushobozi bukomeye bwo gukingira amazi n’ubushobozi bwo gukingira amazi bwiza cane. Ariko rero, ukwihanganira kwayo ibintu bimwebimwe bikomeye cane (nk’ivyo bita ketones) muri rusangi birafise aho bigarukira.
4. Gutunganya n'Igiciro
Kubera ko uburyo bwo gukora n’ugukora ifu butoroshe, igiciro co gukora polyimide (PI) ni kinini. Ikindi kandi, kubera ko ibintu vyinshi vya PI ari ibipande bikomeye canke bikomeye, ingorane zo kubihingura ni nyinshi, kandi ubushobozi bwo gukora inyuma y’-ni muri rusangi butari bwiza.
Ariko rero, uburyo bwo gukora ifu y’amazi/ikomeye bwa silica gel burakuze kandi bukaba bufise amahera aringaniye; irashobora gutunganirizwa biciye ku gupfuka, gusohora canke gutera inshinge, ivyo bikaba bituma vyoroha guhingura ibimenyetso bikomeye, ibipfukisho n’ibipfukisho, gutyo bikaba bituma umuntu ashobora gutunganya neza.
5. Ibintu bisanzwe vyo gukoresha
PI foam ikoreshwa cane mu bikorwa vyo mu kirere (uburinzi bw’ubushuhe n’ugukingira inzu), gukora ibikoresho vy’ubuhinga bwa none (ugukingira ubushuhe bwinshi -imigenderanire y’ubushuhe n’ivyumba vy’ubusa), ibikorwa vy’igisirikare (ubushuhe bwinshi -ubushuhe burengeye ubushuhe n’imibumbe y’ubushuhe), n’ubuhinga buhambaye ({{2}in). ibidukikije vy'ubushuhe bwinshi-).
Ifu ya silicone ikoreshwa cane mu bikorwa bitandukanye, harimwo n’ibinyabiziga bishasha bikoresha inguvu (ugukingira amabateri n’ugukingira ubushuhe), ibikoresho vy’ubuhinga bwa none (gukingira amazi n’ugukingira ivyuma), ibikoresho vyo mu buvuzi (ugukingira ibikoresho n’ibikoresho), gutwara abantu mu nzira y’amagariyamoshi (gukingira n’ugukingira ijwi), n’ugukingira ijwi. ibipfukisho).