Polyurethane AB Adhesive Paura Whakatairanga mura ahi

Polyurethane AB Adhesive Paura Whakatairanga mura ahi
I runga i te tono mo nga hangai mura ahi kore-halogen mo nga taapiri polyurethane AB, kua honoa me nga ahuatanga me nga hua whakahiato o nga mura ahi penei i te konumohe hypophosphite (AHP), te konumohe hydroxide (ATH), te zinc borate, me te melamine cyanurate (MCA), kua hangaia nga kaupapa e toru e whai ake nei. Ko enei hanganga he maaota-kore me te aro ki te arotau i te pai o te mura o te mura, te hototahi o te mahi tinana, me te whaihuatanga o te tukanga:

1. Te Whakamutunga Whakamuri Muri Teitei (Mo te potting hiko, te whakaurunga pākahiko, te whaainga UL94 V-0)

Pahekohenga Whakamutunga mura ahi:

• Konumohe hypophosphite (AHP): 8-12 phr (te momo whakakikorua polyurethane-wai e taunakitia ana hei whakatika i nga take rerenga)
• Aluminum hydroxide (ATH): 20-25 phr (koeke submicron, 0.2-1.0 μm, ki te whakarei ake i te taupū hāora me te char compactness)
• MCA: 5-8 phr (whakatikanga hau-waahanga, mahi tahi me te AHP i roto i te wahanga whakapoapoa)
• Zinc borate: 3-5 phr (whakatairanga i te hanga waro uku me te aukati i te pupuhi)

Mahinga e Manakohia ana:

• Taupū hāora (LOI): ≥32% (PU parakore ≈22%);
• UL94 whakatauranga: V-0 (1.6 mm te matotoru);
• Te kawe werawera: 0.45-0.55 W/m·K (na te ATH me te zinc borate i takoha);
• Te mana pokey: 25,000-30,000 cP (he maimoatanga mata e hiahiatia ana hei aukati i te parataiao).

Tukanga Matua:

• Me whakamararatia te AHP i mua i te waahanga polyol (Wahanga A) kia kore ai te tauhohenga o mua me te isocyanate (Wahanga B);
• Me whakarerekē te ATH me tetahi kaihoko hononga silane (hei tauira, KH-550) hei whakarei ake i te hononga atanga.

2. Te Utu Utu Whanui (Mo te hiri hangahanga, te honohono taonga, te whaainga UL94 V-1)

Pahekohenga Whakamutunga mura ahi:

• Aluminum hydroxide (ATH): 30-40 phr (paerewa micron-kōeke, utu-whai hua, whakakī-momo mura mura);
• Te haukinia polyphosphate (APP): 10-15 phr (kua honoa ki te MCA mo te punaha intumescent, hei whakakapi i nga maataki halogenated);
• MCA: 5-7 phr (tauwehenga ki te APP 1: 2 ~ 1: 3, e whakatairanga ana i te pahuka me te wehenga o te hāora);
• Zinc borate: 5 phr (te pehi auahi, te hanga char auxiliary).

Mahinga e Manakohia ana:

• LOI: ≥28%;
• UL94 whakatauranga: V-1;
• Te whakahekenga utu: ~ 30% (i whakaritea ki te hanganga mura-muri-nui);
• Te pupuri i te kaha tensile: ≥80% (e hiahia ana te APP ki te whakauru ki te aukati i te hauwai).

Tukanga Matua:

• Me microencapsulated APP (hei tauira, me te melamine-formaldehyde resin) hei karo i te makuku me te hanga mirumiru;
• Tāpirihia te 1-2 phr hydrophobic fumed silica (hei tauira, Aerosil R202) mo te aukati-whakanoho.

3. Te Hanga-Tukatuka Maama-iti-Viscosity (Mo te honohono hikohiko tika, me kaha te rere)

Pahekohenga Whakamutunga mura ahi:

• Konumohe hypophosphite (AHP): 5-8 phr (nanosized, D50 ≤1 μm);
• He wīwī pararopi ūkuikui mura mura (he rerekē BDP): 8-10 phr (hei tauira, ngā pārōnaki DMMP-hāogen-kore-hālogena, mau tonu te pokey);
• Aluminum hydroxide (ATH): 15 phr (te whakahiato alumina porohita, te whakataurite i te kawe waiariki);
• MCA: 3-5 ph.

Mahinga e Manakohia ana:

• Te awhe pokey: 10,000-15,000 cP (tata ki nga punaha whakaheke mura wai);
• Te mura o te mura: UL94 V-0 (whakanuia e te ūkuikui wai);
• Te kawe werawera: ≥0.6 W/m·K (he mea takoha mai e te alumina porohita).

Tukanga Matua:

• Ko te AHP me te konumohe porowhita me whakakotahi me te marara i raro i te kutikuti teitei (≥2000 rpm);
• Tāpirihia te 4-6 phr molecular sieve desiccant ki te Wāhanga B hei aukati i te AHP makuku.

4. Whakakotahi i nga Tohu Hangarau me etahi atu otinga

1. Nga Mahi Hangarite:

• AHP + MCA:Ko te AHP e whakatairanga ana i te matewai me te ngongo, i te wa ka tukuna e te MCA te hau hauota i runga i te whakamahana, ka hanga he paparanga waro rite honikoma.
• ATH + Zinc borate:Ka mimiti te ATH i te wera (1967 J/g), ka hangaia e te zinc borate he paparanga karaihe borate hei uhi i te mata.

2. Ko etahi atu whakaahuru mura:

• Ko nga hua o te Polyphosphazene:He tino pai me te pai o te taiao, me te whakamahi i te hua HCl;
• Epoxy silicone resin (ESR):Ka honoa ki te AHP, ka whakaitihia te uta katoa (18% mo te V-0) me te whakapai ake i nga taonga miihini.

3. Tukatuka Mana Morearea:

• parataiao:Ko nga kaihoko parepare (hei tauira, nga momo polyurea-whakarerekehia) e hiahiatia ana mena he pokey <10,000 cP;
• Whakaorangia te aukati:A ape i te nui rawa o te kawakore o te mura ahi (hei tauira, MCA) kia kore ai e pokanoa ki nga tauhohenga kawakawa.

5. Nga Tohu Whakatinana

• Whakaritea te whakamatautau i te hanga mura-muri-nui: kua pania te AHP + submicron ATH (te rahi matūriki toharite 0.5 μm) i te AHP:ATH:MCA = 10:20:5 mo te arotautanga tuatahi.
• Nga whakamatautau matua:
  → LOI (GB/T 2406.2) me te UL94 tahu poutū;
  → Te kaha here i muri i te pahikara waiariki (-30 ℃ ~ 100 ℃, 200 haora);
  → Te rerenga mura ahi i muri i te tere o te koroheketanga (60 ℃/7d).

Te Ripanga Whakamutunga mo te mura