| Tin tức NVL ngành nhựa - Plastic |
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| Sản phẩm NVL ngành nhựa - Plastic |
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| LƯỢT TRUY CẬP |
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| Nhựa PMMA (Nhựa Polymethyl Methacrylate) |
| Nhựa PMMA (Nhựa Polymethyl Methacrylate) |
| Quay lại |
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Nhựa PMMA (Nhựa Polymethyl Methacrylate)
PMMA is a strong and light weight material. It has a density of 1.17–1.20 g/cm3 which is less than half that of glass. It also has good impact strength, higher than both glass and polystyrene; however, PMMA's impact strength is still significantly lower than polycarbonate and some engineered polymers. PMMA ignites at 460 °C (860 °F) and burns, forming carbon dioxide, water, carbon monoxide and low-molecular-weight compounds, including formaldehyde.
PMMA transmits up to 92% of visible light (3mm thickness), and gives a reflection of about 4% from each of its surfaces due to its refractive index (1.4905 at 589.3 nm). It filters ultraviolet (UV) light at wave lengths below about 300 nm (similar to ordinary window glass). Some manufacturers add coatings or additives to PMMA to improve absorption in the 300–400 nm range. PMMA passes infrared light of up to 2,800 nm and blocks IR of longer wave lengths up to 25,000 nm. Colored PMMA varieties allow specific IR wavelengths to pass while blocking visible light (for remote control or heat sensor applications, for example).
PMMA swells and dissolves in many organic solvents; it also has poor resistance to many other chemicals due to its easily hydrolyzed ester groups. Nevertheless, its environmental stability is superior to most other plastics such as polystyrene and polyethylene, and PMMA is therefore often the material of choice for outdoor applications.
PMMA has a maximum water absorption ratio of 0.3–0.4% by weight. Tensile strength decreases with increased water absorption. Its coefficient of thermal expansion is relatively high.
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| HỖ TRỢ |
| RTV keo mỡ silicone, amino silicone, mỹ phẩm, nông nghiệp, dệt nhuộm |
Ms. Nguyễn Trang
024.3995.9799 - trangkd.sonanh@gmail.com |
| | Dầu Silicone, Silicone lỏng, Phá bọt silicone, hàng tiêu dùng, thực phẩm & dinh dưỡng |
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| | Supply Chain & Logistics |
Mr Nam
024.3995.9799 - namnguyen.vhttdl@gmail.com |
Ms. Giang
024.3995.9799 - huonggiangftu.99 |
Ms Trang
091.150.2290 - trangkd.sonanh@gmail.com |
| | General Administration - Accounting, Quản trị chung - Kế toán |
Mr Dũng
024.3995.9799 - sonanhgt |
Ms Trang
091.1502.290 - trangkd.sonanh@gmail.com |
Ms Hương Giang
0243.995.9799 - huonggiangftu.99 |
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Công Ty TNHH Thương Mại Tổng Hợp Sơn Anh
SonAnh General Trading Company Limited
Office Address : No. 06, 127/56 Van Cao Street, Lieu Giai Ward,
Ba Dinh District, Hanoi City, Vietnam
Warehouse : Duc Tu Hamlet, Dai Dong Ward, Dong Anh Dist., Hanoi
Tel : +84-24-3995 9799
Fax : +84-24-3761 5666
Email : sonanh@sonanh.com
Website : www.sonanh.com
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