SikaBiresin® GC155 | Gelcoat epoxy làm khuôn composite chịu nhiệt rất cao
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SikaBiresin® GC155 — Gelcoat Epoxy Den | Tg 150°C | Rollable | Khuon Lon
SikaBiresin® GC155 la gelcoat epoxy 2 thanh phan mau den cap cao nhat trong ho GC — Tg 150°C / HDT 145°C (sau post-cure 8h/160°C). Self-paired (A+B deu ten GC155), mix ratio 100:14, pot life 4 GIO (500g) dai nhat toan ho GC, do nhot hon hop chi 8.500 mPa·s — duy nhat co the ap bang roller (lambskin) theo chieu cheo (criss-cross). Thiet ke cho khuon composite lon (len den 140°C), su dung cung he CR169thix + CR168 + CR131.
POT LIFE 4 GIO (500g)
ROLLABLE CRISS-CROSS
OPEN TIME 6-24H
GC155 la buoc dau (gelcoat skin) trong he thong khuon composite 4 lop: GC155 (gelcoat) + CR169thix (coupling layer) + CR168 (wet lay-up laminate) + CR131 (infusion). He thong duoc Sika thiet ke cho khuon composite soi gia cuong lon, on dinh nhiet len den 140°C. Pre-cure khuyen nghi: 4h tai 60°C; post-cure day du: 8h/160°C de dat Tg 150°C.
*Nguon: TDS SikaBiresin® GC155, Version 10/2018 (globaltool.ch); Application Manual GC155 Composite Mold Making System, Sika Services AG, 17.12.2024
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GC155 — Tg 150°C CAO NHAT TOAN HO GC · POT LIFE 4 GIO · ROLLABLE
Tg 150°C — Cao Nhat Toan Ho GC
Sau post-cure 8h/160°C, GC155 dat Tg 150°C (ISO 11357) va HDT 145°C (ISO R75) — vuot xa GC108 (Tg 134°C) va GC120 (Tg 118-120°C). Day la gelcoat co nhiet do thuy tinh hoa cao nhat trong toan bo danh muc SikaBiresin® GC. He thong GC155 duoc thiet ke cho khuon composite chiu nhiet “up to 140°C” (Application Manual Sika, 17.12.2024).
Pot Life 4 Gio (500g) — Dai Nhat Toan Ho GC
Pot life ~4 GIO (500g, 25°C) — cao hon bat ky gelcoat nao trong ho GC (GC115 chi 40 phut, GC108/GC112 chi 30 phut). Do nhot hon hop thap (8.500 mPa·s) ket hop pot life sieu dai, GC155 duoc thiet ke dac biet cho khuon composite co dien tich lon, noi thao tac keo dai nhieu gio lien tuc. (Nguon: TDS GC155, Sika Germany, 10/2018)
Rollable Criss-Cross — Doc Dao Trong Ho GC
Application Manual Sika (17.12.2024) xac nhan: “SikaBiresin® GC155 can be applied in various directions by roller (criss-cross).” Day la dac tinh doc dao — trong khi cac gelcoat truyen thong chi quet co mot chieu, GC155 co the ap dung bang lambskin roller criss-cross, tien loi cho khuon lon. Layer thickness khuyen nghi: 300-400 µm.
Open Time 6-24 Gio — Linh Hoat Nhat
Sau khi quet gelcoat, co the ap coupling layer trong khoang 6-24 gio (tack stage tai 23°C, humidity <70% RH). Application Manual Sika xac nhan: “The tack stage has successfully been tested to be persistent for an interval up to 24 hours.” Day la loi the lon cho khuon lon — khong bi ep thoi gian như gelcoat truyen thong.
Do Ben Va Dap 15 kJ/m2 — Cao Nhat Ho GC
Impact resistance 15 kJ/m2 (ISO 179, sau post-cure 8h/160°C) la cao nhat trong toan ho GC gelcoat. GC155 co cuong do uon 95 MPa, mo-dun uon 5.250 MPa, cuong do nen 120 MPa va do dan 2,7% (ISO 178). Ket hop voi Tg 150°C, GC155 cho profil co ly phuc tap tot nhat trong tat ca GC gelcoat. (Nguon: TDS GC155, Sika Germany, 10/2018)
He Thong 4 Lop Tich Hop
GC155 la mot phan cua he thong khuon composite 4 lop cua Sika: (1) GC155 gelcoat (skin coat), (2) CR169thix coupling layer, (3) CR168 wet lay-up laminate, (4) CR131 infusion resin. He thong duoc toi uu hoa de san xuat khuon composite soi gia cuong lon co on dinh nhiet len den 140°C. (Nguon: Application Manual Sika, 17.12.2024)
TINH NANG KHONG CO
- ✗ GC155 A va B khac nhau du cung ten — khong dung mot minh
- ✗ Post-cure 8h/160°C doi hoi lo say chuyen nghiep cao cap
- ✗ Phuc tap hon gelcoat tieu chuan — chi danh cho chuyen nghiep
- ✗ Phai dung ca he thong (CR169thix + CR168 + CR131)
- ✗ Han SD B chi 12 thang (du A duoc 24 thang)
Ca Component A lan B cua GC155 deu mang ten “SikaBiresin® GC155” nhung la hai hop chat khac nhau (A: epoxy resin filled den; B: amine unfilled hach amber). Phan biet qua nhan chai va ty trong (A: 1,60 g/cm3; B: 0,98 g/cm3). Khong nham lan khi dat hang.
GC155 la lua chon khi: (1) khuon composite co dien tich lon (canh quat dien gio, than xe, may bay); (2) can Tg cao nhat (150°C); (3) quy trinh san xuat khuon phuc tap, nhieu gio; (4) su dung ca he thong CR169thix+CR168+CR131 cua Sika. Khong phu hop khuon nho hoac xuong chua co kinh nghiem voi he gelcoat cao cap.
KHUON COMPOSITE LON & NHIET DO CAO
- ► Khuon canh quat turbine dien gio lon (>40m)
- ► Blade mould chiu nhiet trong qua trinh infusion RTM
- ► Khuon nacelle va hub turbine gio
- ► Khuon tam pin nang luong mat troi lo co
- ► Khuon canh may bay composite (Tg 150°C)
- ► Khuon prepreg chiu nhiet hang khong dan dung
- ► Negative mould composite hang khong co dien tich lon
- ► Khuon RTM hang khong nhiet do cao 120-140°C
- ► Khuon than xe composite cao cap (Tg cao)
- ► Khuon bo phan xe dua composite cao nhiet
- ► Khuon vo tau composite lon khuyen nghi infusion
- ► Khuon he thong dung day tau composite cao cap
TECHNICAL DATA — GC155 (TDS 2018)
Nguon: TDS SikaBiresin® GC155, Version 10/2018 (Sika Germany); Application Manual Composite Mold Making System with SikaBiresin® GC155, 17.12.2024. Gia tri co ly sau post-cure 8h/160°C. Post-cure nhe hon (4h/120°C) cho do ben nhiet thap hon.
| Thong so | GC155 (A) — Resin | GC155 (B) — Hardener | Hon hop |
|---|---|---|---|
| Thanh phan | Epoxy resin, filled, black | Amine, unfilled, amber | Den (black) |
| Do nhot, 25°C (mPa·s) | 33.000 | 120 | 8.500 |
| Ty trong, 25°C (g/cm3) | 1,60 | 0,98 | — |
| Ty le tron A:B (khoi luong) | — | 100 : 14 | |
| Pot life, 500g, 25°C | — | ~4 GIO ★★ | |
| Tack stage (AP Manual 23°C) | — | ~5-6 gio sau khi quet | |
| Open time (coupling layer) | — | 6-24 gio ★★ | |
| Han bao quan (A / B) | 24 thang | 12 thang ⚠ | — |
| Ung dung ket hop | + CR169thix (coupling) + CR168 (wet lay-up) + CR131 (infusion) | ||
Tinh Chat Co Ly & Nhiet (sau post-cure 8h/160°C)
| Thong so | Gia tri | Tieu chuan |
|---|---|---|
| Ty trong da dong ran | 1,53 g/cm3 | ISO 1183/A |
| Do cung Shore | D 89 | ISO 868 |
| Mo-dun uon (E-Modulus) | 5.250 MPa | ISO 178 |
| Cuong do uon | 95 MPa | ISO 178 |
| Do dan ngoai (ISO 178) | 2,7% | ISO 178 |
| Mo-dun keo (E-Modulus) | 4.700 MPa | ISO 527 |
| Cuong do keo | 50 MPa | ISO 527 |
| Cuong do nen | 120 MPa | ISO 604 |
| Do ben va dap | 15 kJ/m2 ★ | ISO 179 |
| HDT (ISO R75 Af) | 145°C | ISO R75 |
| Glass transition temperature (Tg) | 150°C ★★ | ISO 11357 |
Tat ca gia tri co ly sau post-cure 8h/160°C. Post-cure thay the nhe hon: 4h/120°C cho do ben nhiet thap hon. Nguon: TDS GC155 v10/2018.
GC155 (B): 0,7 kg ⚠ 12T
QUY TRINH AP DUNG GC155 — HE THONG 4 BUOC
TRON VA QUET GC155
Tron GC155 A+B (100:14), ≤300 vong/phut, ≥3 phut. Ap bang lambskin roller (criss-cross duoc phep) hoac co lam 2-3 cm, 300-400 µm. Ap tat ca trong 1 gio sau khi tron. Chuon moi plug/model chiu 60°C.
CHO TACK STAGE 5-6 GIO
Open time 6-24 gio: Sau 5-6 gio tai 23°C, gelcoat dat tack stage (an sot khi cham nhe nhung khong dinh vat lieu). Co the doi len den 24 gio truoc khi ap coupling layer — loi the lon cho khuon cong nghiep.
HE THONG LAMINAT
Ap CR169thix (coupling) ngay sau tack stage. Ap CR168 wet lay-up trong coupling con tươi. Them peel-ply. Pre-cure: 4h/60°C (toc do tang nhiet 10°C/h). Giu peel-ply den buoc tiep theo de bao ve be mat.
INFUSION CR131 & POST-CURE
Tiep theo: infusion CR131 cho main laminate. Post-cure day du: 8h/160°C de dat Tg 150°C/HDT 145°C. Tang nhiet tu tu, giu on dinh, giam tu tu. Tao conformer cho chi tiet phuc tap.
GC155 la gelcoat duy nhat trong ho GC co the ap bang roller: dung short pile laminating roller (lambskin/sheepskin), luc du de dat do day 300-400 µm. GC155 cho phep quet nhieu chieu (criss-cross) — trong khi gelcoat truyen thong chi mot chieu bang co. Theo doi do day bang wet film comb khi ap. (Nguon: App Manual Sika 17.12.2024)
App Manual Sika (17.12.2024): “All SikaBiresin® products mentioned in this document are suitable for experienced professional users only.” GC155 doi hoi: lo say cong nghiep (60°C pre-cure va 160°C post-cure), kiem soat nhiet do trong xuong (18-25°C), va kinh nghiem san xuat khuon composite lon. Khong phu hop xuong chua co kinh nghiem voi gelcoat epoxy cao cap.
GC155 SO SANH TOAN HO GC — DINH CAO NHAT
KHI NAO CHON GC155?
- ► Khuon composite co dien tich lon (>10m, canh quat dien gio, than may bay): → GC155 (pot life 4 gio + open time 6-24 gio, rollable)
- ► Khuon can Tg cao nhat (>140°C): → GC155 (Tg 150°C, HDT 145°C)
- ► Khuon standard Tg cao nhat (134°C), be mat bong guong: → GC108 + GC08 (post-cure 4h/120°C)
- ► Khuon can cung nhat (Shore D 92) post-cure don gian: → GC112 + GC12 (2h/80°C)
- ► Khuon PU foam va polyester: → GC115 + GC05 (pot life 40 phut)
- ► Khuon RTM khang hoa chat + thach cao am: → GC080 + GC14 (Tg 104°C)
CAU HOI THUONG GAP
CAN TU VAN
SIKABIRESIN® GC155?
Tu van he thong GC155 cho khuon composite lon cua ban — ky su Hoa chat PT phan hoi trong 2 gio lam viec.
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