Silicone PSA Mushure meKuchembera Kwepamusoro: Peel Simba uye Kubatana neGiredhi

Apo a PTFE high-temperature adhesive tape inoshandiswa munzvimbo inopisa - taura, 200 ° C kwemavhiki kana mwedzi - iyo silicone pressure-sensitive adhesive (PSA) inogona kuchinja. Simba rePeel rinogona kusimuka, kudonha, kana kutamisa zvakasara. Kubatana kunogona kuwedzera (brittleness) kana kuderera (kubatana kukundikana).

Haasi ese silicone PSAs anoita zvakafanana. Misiyano inosvika pakuumbwa kwepolymer (methyl vs. methylphenyl), crosslinking mechanism (peroxide vs. kuwedzera kurapwa), uye chiyero cheMQ resin kune rubber.

Aokai PTFE inoshandisa akawanda silicone PSA mamakisi mumatepi edu. Gwaro iri rinotsanangura zvinoitika kusvuura simba uye kubatana mushure mekuchembera kwakanyanya kwegiredhi rega rega, uye nekusarudza iyo yakakodzera yekushandisa kwako.

Chii Chinoitika kune Silicone PSA Pasi Pekupisa - Maviri Kutadza Modes

Kana wakura pakupisa (200-250 ° C), silicone PSAs inogona kuita shanduko mbiri dzinopikisa:

1. Post-crosslinking (inotungamira kune brittleness)

Mapoka ekushanda asingasviki anoramba achiita, achiwedzera crosslink density. Yekutanga peel simba inogona kusimuka kwechinguva, yobva yadonha zvakanyanya sezvo inonamira ichinyanya kuomarara. Static shear simba rinoita kunge richiwedzera, asi kubata simba nekukanganisa kuramba kunodzikira. Firimu yekunamatira inova yakaoma uye inoputika.

2. Kuora kwemusana (kunotungamira kusvuura kurasikirwa uye kusara)

Iyo polydimethylsiloxane musana inopinda cyclization uye cheni scission. Simba repeel rinodonha nguva dzose. Iyo yekunamatira inogona kuendesa kune substrate (yakasara) kana kukundikana yakabatana. Izvi zvakajairika mune yakaderera-giredhi methyl silicone PSAs.

Key modulating parameters:

• Phenyl yemukati (yakakwirira = zvirinani kupisa kusagadzikana)

• Crosslink density uye kurapa rudzi (wedzero mushonga vs. peroxide kurapwa)

• Ratio yeMQ resin kune silicone rabha

Giredhi Classifications by Chemical Structure

1. Standard polydimethylsiloxane (methyl-type silicone PSA)

• Peel kuchengetedza mushure mekukwegura (200-250 ° C): Simba repeel rinokwira zvishoma pakutanga, rinobva raderera. Mushure memazuva manomwe pa250 ° C, kuchengetwa kweganda kunongova 50-70% . Kuita kunodonha nekukurumidza pakupisa kwakanyanya. Kushatisa kunobva kucyclization ye dimethyl siloxane musana.

• Kugadzikana kwekubatana: Peroxide-yakaporeswa shanduro (semuenzaniso, KR-101) ine zvakasara zvekutanga izvo zvinokonzeresa zvisingadzoreki mushure mekurapa - adhesive inoomesa uye embrittles. Simba rekutanga rekugera rinovandudza, asi kubata madonhwe emagetsi, uye kutadza kwakabatana kunoitika mukupisa. Mashanduro ekuwedzera-akarapwa ari nani zvishoma asi achiri akaganhurirwa neasina kusimba ekudzivirira kupisa kweiyo dimethyl musana.

2. Methylphenyl polysiloxane (yakakwirira-inodzivirira giredhi)

• Peel kuchengetwa mushure mekuchembera: Phenyl parutivi cheni zvinokanganisa kurongedza nguva dzose kwezvikamu zvedimethyl uye kudzvinyirira cyclization degradation. Mushure memazuva manomwe pa 250 ° C, kuchengetedza simba re peel kunopfuura 85% . High-phenyl formulations inochengetedza yakagadzikana mapeel zvivakwa kunyangwe pa260-288°C.

• Kubatana kugadzikana: Zvakanaka. Kuveura simba kunoshanduka zvishoma; kubata simba rekuchengetedza kunopfuura 80%. Iyo yekunamatira layer inoramba ichichinjika kwenguva refu isina embrittlement kana zvakasara. Kuwedzera-akarapwa akakwira-phenyl mamakisi ndiwo ekutanga thermally yakagadzikana silicone PSA.

3. Special high-peel uye yakaderera-peel tsika mamakisi

• High-peel mamakisi (semuenzaniso, Dow 7385, yakajairika peel> 10N/25mm): Yakakwira MQ resin kurodha inopa yakanakisa yekutanga tack uye peel simba, asi pamubhadharo wekupisa kupisa uye kugadzikana kwekubatana. Ivo vanoratidza hombe peel kudonha mushure mekuchembera uye vane tarisiro yekusarira nekuda kwekuora kwe resin kupisa. Shandisa chete kune dzimwe nguva dzakaderera-tembiricha zvikumbiro.

• Yakaderera-peel, yakakwirira-yakabatana inodzivirira firimu mamakisi: Yakakwira crosslink density inopa yakagadzika peel performance uye yakanakisa kuchembera kugadzikana, asi yakaderera yekutanga tack. Mushure mekuchembera, ivo vanoramba vakabatana asi vanoomeswa, vachideredza kuenderana kune yakaoma nzvimbo.

Crosslinking Mechanism – Peroxide vs. Addition Cure (Same Methyl Base)

Kunyangwe iine yakafanana methyl polymer, nzira yekurapa inoshandura zvakanyanya maitiro ekuchembera.

1. Peroxide-yakarapwa (yakajairika chizvarwa chekutanga)

• Residual peroxide inokonzera kusingadzoreki post-crosslinking panguva yepamusoro-tembiricha kuchembera.

• Peel simba spikes pakutanga, wobva wadonha zvakanyanya.

• Kubatana kunokwira kwekanguva, kuchiteverwa neembrittlement uye kubata kutadza kwesimba.

• Batch-to-batch kuchembera kuenderana kwakashata.

2. Kuwedzera-kurapwa (hydrosilylation kurapa)

• Mushonga unoburitsa hapana byproducts; crosslink network inodzoreka chaizvo.

• Kuchinja kwezvivakwa mushure mekuchembera kunotevera fungidziro yemutsara maitiro.

• Kure kwepamusoro pekuchengetedza peel uye kugadzikana kwekubatana zvichienzaniswa neperoxide magadzirirwo.

Giredhi Sarudzo Yekutungamira

Kurudziro yeAokai PTFE : Kune chero tepi yePTFE ichaona tembiricha yakadzikama iri pamusoro pe200 ° C, tsanangura yekuwedzera-yakarapwa methylphenyl silicone PSA. Mutengo wepamberi wakakwira, asi unodzivirira kutadza kwemunda kunokonzerwa neadhesive residue kana kurasikirwa kwebhondi.

Pfupiso - Kufananidza Silicone PSA Giredhi kune Thermal Demand

• Methyl-type silicone PSA (kunyanya peroxide-yakarapwa) yakakodzera chete kushandiswa kwepakati kana kuderera-kupisa. Mushure memazuva manomwe pa250 ° C, tarisira 30-50% kurasikirwa kweganda uye zvinogona kuitika.

• Methylphenyl (yakakwirira-phenyl) silicone PSA inochengetedza> 85% peel simba uye flexible kubatana mushure mekukwegura kwakafanana. Ndiyo sarudzo yekuenderera mberi kwe200-250 ° C sevhisi.

• Crosslinking mechanism ine basa zvakanyanya: kurapa kwekuwedzera (hydrosilylation) yakagadzikana zvakanyanya pane kurapa kweperoxide.

• High-peel mamakisi anotengeserana nekugadzikana kwekuchembera kwekutanga tack - vadzivise mumashandisi anopisa.

Pakuda kusungirirwa kwepamusoro-tembiricha, Aokai PTFE inoshandisa kuwedzera-yakarapwa methylphenyl silicone PSAs. Tinogona kupa peel retention data mushure me1000h pa250 ° C pakukumbira.

Zvemukati zvehunyanzvi zvinopihwa ne Jiangsu Aokai New Materials Technology Co., Ltd.

Kune yakadzama tekinoroji madheti uye tsika mhinduro dzePTFE yakakwirira-tembiricha machira, matepi, mesh mabhandi, nezvimwe:

• VaGuo: +86 18944819998

• Mr. Liu: +86 13705266308

Kuomerera kune hunyanzvi uye kutendeseka, isu tinopa imwe-yekumira yakagadziridzwa mhinduro uye anofunga mushure mekutengesa masevhisi.