Silicone PSA Mgbe ịka nká dị elu: Ike peel na njikọta site na ọkwa.

Mgbe a A na-eji teepu nrapado dị elu nke PTFE mee ihe na gburugburu ebe dị ọkụ - sịnụ, 200 ° C maka izu ma ọ bụ ọnwa - silicone pressure-sensitive adhesive (PSA) nwere ike ịgbanwe. Ike bee nwere ike ibili, daa ma ọ bụ nyefe fọdụrụ. Njikọ nwere ike ịbawanye (nkụkụ) ma ọ bụ ibelata (ọdịda nchikota).

Ọ bụghị silicone PSA niile na-akpa àgwà otu. Ndị dị iche na-agbadata polymer mejupụtara (methyl vs. methylphenyl), crosslinking usoro (peroxide vs. mgbakwunye ọgwụgwọ), na ruru nke MQ resin na roba.

Aokai PTFE na-eji ọtụtụ akara PSA silicone na teepu anyị. Ntuziaka a na-akọwa ihe na-eme n'ịkpọcha ike na ịdị n'otu mgbe ịka nká dị elu maka ọkwa ọ bụla, yana otu esi ahọrọ nke ziri ezi maka ngwa gị.

Ihe na-eme silicone PSA n'okpuru okpomọkụ - Ụdị ọdịda abụọ

Mgbe ị mere agadi na okpomọkụ dị elu (200-250 ° C), silicone PSA nwere ike ịme mgbanwe abụọ na-emegide:

1. Post-crosslinking (na-eduga na brittleness)

Otu ndị na-arụ ọrụ na-enweghị mmeghachi omume na-aga n'ihu na-emeghachi omume, na-abawanye njupụta crosslink. Ike bee mbụ nwere ike ibili nwa oge, wee daa nke ọma ka nrapado na-esikwa ike. Ike shiee static na-egosi na ọ na-abawanye, mana ijide ike na nguzogide mmetụta na-akawanye njọ. Ihe nkiri nrapado na-aghọ siri ike na mgbawa.

2. Ọkpụkpụ azụ (na-eduga n'ịpụpụ bee na ihe fọdụrụ)

Ọkpụkpụ azụ polydimethylsiloxane na-enweta cyclization na agbụ ígwè. Ike bee na-ada na-aga n'ihu. Ihe nrapado nwere ike ibufe na mkpụrụ (ihe fọdụrụ) ma ọ bụ daa n'otu ọnụ. Nke a bụ ihe a na-ahụkarị na methyl silicone PSA dị ala.

Igodo na-agbanwe agbanwe:

• Ọdịnaya Phenyl (dị elu = nguzogide okpomọkụ ka mma)

• Crosslink njupụta na ụdị ọgwụgwọ (mgbakwunye ọgwụgwọ vs. peroxide ọgwụgwọ)

• Ratio nke MQ resin ka silicone rọba

Nhazi ọkwa ọkwa site na Structure Chemical

1. Standard polydimethylsiloxane (methyl-ụdị silicone PSA)

• Njide bee mgbe ịkachara (200-250 Celsius): Ike bee na-ebili ntakịrị na mbụ, wee daa. Mgbe ụbọchị 7 gachara na 250 Celsius, njigide bee bụ naanị 50-70% . Arụmọrụ na-ada ngwa ngwa na okpomọkụ dị elu. Mmebi sitere na cyclization nke ọkpụkpụ azụ dimethyl siloxane.

• Nkwụsi ike njikọkọ: Ụdị agwọta-peroxide (dịka, KR-101) nwere ihe mmalite nke na-ebute ọgwụgwọ mgbe a na-achịkwaghị achịkwa - nrapado siri ike na embrittles. Ike mkpụcha nke mbụ na-akawanye mma, mana ijide ike na-adaba, na ọdịda njikọta na-apụta n'okpuru okpomọkụ. Ụdị agbakwunyere gwọchara dịtụ mma mana ọ ka na-ejedebe site na nkwụsi ike ọkụ na-adịghị mma nke ọkpụkpụ azụ dimethyl.

2. Methylphenyl polysiloxane (ọkwa na-eguzogide okpomọkụ dị elu)

• Njide bee mgbe ịkachara nká: Agbụ n'akụkụ Phenyl na-akpaghasị mbukọ nke akụkụ dimethyl mgbe niile ma na-egbochi mmebi cyclization. Mgbe ụbọchị 7 gachara na 250 Celsius, njigide ike bee gafere 85% . Usoro phenyl dị elu na-ejigide ihe peel kwụsiri ike ọbụlagodi na 260-288 Celsius.

• Nkwụsi ike njikọta: Ọ dị mma. Ike shiee na-agbanwe ntakịrị; njide ike karịrị 80%. Ngwunye nrapado na-anọgide na-agbanwe ogologo oge na-enweghị embrittlement ma ọ bụ ihe fọdụrụnụ. Ngụkọ phenyl dị elu gwọrọ agbakwunyere bụ PSA silicone kwụsiri ike nke ọma.

3. Pụrụ iche elu-peel na obere-peel omenala akara ule

• Ogo peel dị elu (dịka, Dow 7385, peel ahụkarị> 10N / 25mm): MQ resin loading dị elu na-enye ọmarịcha mbido mbụ na ike bee, mana na ọnụ ahịa nguzogide okpomọkụ na nkwụsi ike. Ha na-egosi ọdịda peel buru ibu mgbe ịkachara ma na-enwekarị ike ịpụta n'ihi ire resin thermal. Jiri naanị maka ngwa obere okpomọkụ na-adịte aka.

• Mpempe ihe nkiri dị ala, nke nwere njikọ dị elu: njupụta crosslink dị elu na-enye arụmọrụ peel kwụsiri ike yana nkwụsi ike ịka nká dị mma, mana obere ihe mbido mbụ. Mgbe ịka nká, ha na-anọgide na-ejikọta ọnụ mana ha na-esi ike, na-ebelata conformability na elu ndị siri ike.

Nrụgharị Crosslinking – Peroxide vs. Mgbakwụnye ọgwụgwọ (Otu Methyl Base)

Ọbụlagodi na otu polymer methyl, usoro ọgwụgwọ na-agbanwe n'ụzọ dị egwu omume ịka nká.

1. Peroxide-gwọrọ (ọgbọ mbụ nke omenala)

• Peroxide fọdụrụnụ na-akpalite njikọ gafere n'enweghị nchịkwa n'oge oke okpomọkụ.

• Pechaa spikes na mbụ, wee daa nke ọma.

• Njikọta na-ebili nwa oge, na-esote embrittlement na ijide ọdịda ike.

• Nkwekọrịta ịka nká ogbe-na-ogbe adịghị mma.

2. Mgbakwụnye-gwọrọ (hydrosilylation ọgwụgwọ)

• Ngwọta na-emepụta ọ dịghị byproducts; netwọk crosslink bụ nke a na-achịkwa nke ọma.

• Mgbanwe ihe onwunwe mgbe ịka nká na-agbaso usoro ahịrị ahịrị a na-ebu amụma.

• Ndogide bee na nkwụsi ike dị elu nke ukwuu ma e jiri ya tụnyere usoro peroxide.

Ntuziaka Nhọrọ ọkwa

Ndụmọdụ Aokai PTFE : Maka teepu PTFE ọ bụla nke ga-ahụ okpomọkụ na-adịgide karịa 200 Celsius, kọwaa PSA methylphenyl silicone gbakwunyere gwọọ. Ọnụ ego a na-akwụ n'ihu dị elu, mana ọ na-egbochi ọdịda ubi nke ihe fọdụrụ na nrapado na-akpata ma ọ bụ nkwụsị nke njikọ.

Nchịkọta – Dakọtara Silicone PSA ọkwa na ihe ọkụ chọrọ

• Ụdị silicone PSA nke Methyl (karịsịa peroxide-gwọọ) dabara naanị maka iji obere oge ma ọ bụ obere okpomọkụ. Mgbe ụbọchị 7 gachara na 250 Celsius, na-atụ anya mfu peeled 30-50% yana nhụsianya enwere ike.

• Methylphenyl (high-phenyl) silicone PSA na-ejigide> 85% ike peel na njikọta na-agbanwe agbanwe mgbe otu ịka nká gasịrị. Ọ bụ nhọrọ maka ọrụ 200-250 Celsius na-aga n'ihu.

• Usoro nchigharị anya dị mkpa nke ukwuu: ọgwụgwọ mgbakwunye (hydrosilylation) kwụsiri ike karịa ọgwụgwọ peroxide.

• Akara peel dị elu na-agbanwe nkwụsi ike ịka nká maka ihe mbụ - zere ha na ngwa ọkụ.

Maka ịchọ njikọ okpomọkụ dị elu, Aokai PTFE na-eji methylphenyl silicone PSA gbakwunyere gwọọ ya. Anyị nwere ike ịnye data njigide bee mgbe 1000h na 250 Celsius C maka arịrịọ.

Ọdịnaya nka na-enye Ụgwọ nke ụlọ ọrụ Jiangsu Aokai New Materials Technology Co., Ltd.

Maka nkọwa zuru ezu teknuzu datasheets na ngwọta omenala maka akwa akwa okpomọkụ PTFE, teepu, eriri ntupu, na ndị ọzọ:

• Maazị Guo: +86 18944819998

• Maazị Liu: +86 13705266308

N'ịgbaso ọkachamara na iguzosi ike n'ezi ihe, anyị na-enye ihe ngwọta ahaziri nke otu nkwụsị na ọrụ ndị na-eche echiche mgbe ire ahịa gasịrị.