Nsonsonoe a ɛda Neutral Silicone Sealant ne Medium Silicone Structural Adhesive ntam

I. Nsonsonoe a Ɛwɔ Nneɛma a Wɔhyehyɛ ne Ɔkwan a Wɔfa so Yɛ Aduru mu
1. Silicone Sealant a ɛnyɛ afã biara:

- Nneɛma titiriw a wɔde yɛ: hydroxyl-a wɔagyae polydimethylsiloxane. Ɛnam nsa a wɔde yi fi mu so sa yare denam nsu a ɛtwetwe fi mframa mu so, na ɛyɛ elastomer a ɛyɛ mmerɛw bere a ayɛ no yare no.

- Sare no nkakrankakra (tack-free time bɛyɛ simma 30-60, ayaresa a edi mũ gye nnɔnhwerew 24-72), na ɛma ɛfata ma dwumadie a ɛhia sɛ wɔsan de si baabi foforɔ.

- Acid biara nni mu na ɛnyɛ-asɛe nneɛma a ɛwɔ aseɛ te sɛ dadeɛ ne ahwehwɛ. Ne pH bɛyɛ nea ɛnyɛ nea ɛfa biribiara ho (6.5-7.5).

2. Medium Silicone Nneɛma a Wɔde Yɛ Nneɛma:

- Ɔde silanes anaa plasticizers a wɔasesa ka ho ma ɛyɛ-modulus a ɛkorɔn (elastic modulus Kɛseɛ anaa ɛne 0.4 MPa yɛ pɛ) bondline bere a wɔayɛ no aduru no. Wɔagye nneɛma bi atom sɛ ɛne ASTM C1184 gyinapɛn hyia.

- Ntɛmntɛm a wɔde sa yareɛ (tack-free time 20-simma 40) ne bond ahoɔden a ɛkorɔn (tensile ahoɔden Kɛseɛ anaa ɛne 0.7 MPa yɛ pɛ, hwɛ GB 16776-2005), a ɛma ɛfata ma adesoa-soa adan.

II. Adwumayɛ ne Dwumadi a Wɔde Toto Ho
1. Mfiridwuma mu Nneɛma:

- Neutral silicone sealants taa wɔ tensile strength a ɛyɛ 0.5-1.0 MPa ne elongation a ɛyɛ 200%-300%, na ɛma ɛfata sɛ wɔde sealing dynamic joints (te sɛ gaps a ɛda apon ne mfɛnsere ntam).

- Medium silicone structural adhesives taa wɔ tensile ahoɔden a ɛboro 1.0 MPa, a ebinom a ɛkorɔn-ahoɔden grades du 1.5 MPa (te sɛ Baiyun SS622). Wɔayɛ no pɔtee ama structure bonding applications te sɛ glass curtain walls ne dry-hanging stone.

2. Wim Tebea a Ɛko Tia ne Ɔhyew a Ɛwɔ Hɔ:

- N'abien nyinaa yɛ UV-resistant, nanso medium silicone structural adhesives wɔ bere tenten-ber temperature range a ɛtrɛw (-40℃to 150℃, sɛ wɔde toto -50℃to 120℃ma neutral silicone adhesives).

Silicone adhesives a ɛnyɛ afã biara no twe adwene si nsuo a ɛtumi siw ano ne nsunsuansoɔ a ɛko tia so kɛseɛ (a ɛne GB/T 14683-2017 hyia), berɛ a ɛsɛ sɛ structural adhesives no twa asasewosoɔ sɔhwɛ mu (te sɛ JIS A5758).

3. Nneɛma a Wɔtaa De Di Dwuma:

- Neutral silicone adhesives: Nsuo a wɔde siw aguaree mu ne nea wɔde hyɛ mu, tile grouting, ne pipe joint a wɔde hyɛ mu.

- Medium silicone structural adhesives: Ɔdan a ɛkorɔn-ɔdan ahwehwɛ ntama afasu, owia dan frame bonding, ne elevator shaft reinforcement.

III. Ahwɛyiye a Wɔde Di Dwuma
1. Ansa na wɔde silicone a ɛnyɛ nea wɔde nkata so bɛhyɛ mu no, ɛsɛ sɛ wohohoro substrate no ani na wɔakwati ngo a ebetumi aka adhesive no. Structural adhesives hwehwɛ sɛ wɔde substrate a ɛyɛ dry na wɔde primer di dwuma (sɛ nhwɛso no, aluminium hwehwɛ sɛ wɔyɛ adwuma titiriw).

2. Ɛsɛ sɛ wɔyɛ structurel adhesives yɛ compatibility testing (a ɛkyerɛ ASTM C1087) na wɔasiw nnuru a ɛne nneɛma a ɛka bom yɛ adwuma no ano.

Atifi hɔ ntotoho no kyerɛ sɛ ɛwom sɛ abien no nyinaa yɛ organic silicone adhesives de, nanso wɔn nhyehyɛe botae ne adwumayɛ ho nsɛnkyerɛnne no yɛ soronko kɛse. Ɛsɛ sɛ wɔn a wɔde di dwuma no gyina wɔn ahiade pɔtee so paw biako.