Difference between revisions of "Glazing comparison"
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==Physical and Chemical Properties== | ==Physical and Chemical Properties== | ||
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Revision as of 10:38, 18 September 2023
- Record in progress
Description
Any optically transparent thermoplastic sheet that may be used as a replacement for window glass. Most commonly used polymer types include acrylics, polycarbonates, and polyesters.
| Polymer | Advantages | Applications | Commercial brands |
|---|---|---|---|
| Acrylic (PMMA) | Optically clear, lightweight, high resistance to UV light and weathering can be obtained in many sizes and shapes, forming does not affect clarity; shatter resistant | Display cases, light fixtures, transparent shelves for lightweight materials, indoor and outdoor signage | Optix, Plexiglas, Acrylite |
| Polycarbonate (PC) | High strength and stiffness (more than 200 times stronger than glass); lighter than glass; easy to machine, impact resistant, may be exposed to high heat | Bullet proof windows and doors, windshields and protective barriers, eyewear, visors in sporting gear, cell phones, signage; furniture; UV grades available | Lexan; Tuffak (formerly Makrolon); Palsun; Trizod |
| Polyethylene Terephphthalate (PET) | General purpose; inexpensive; high strength; resistant to chemicals | Water bottles, Fibers, films | Vivak, Dartex |
| Amorphous Copolyester (PETG) | Wide range of properties with excellent clarity; high strength; resistant to chemicals and heat. | Often used as a substitute for PC or PMMA | |
| Polyvinyl Chloride (PVC) | Water-clear clarity; high impact strength ; excellent chemical resistance; fire resistant | Safety glazing (sneeze guards for COVID); windows; packaging, bags, connectors, valves; UV grades available | |
| Liquid Silicone Rubber (LSR) | Low viscosity elastomer with excellent optical clarity and durability; lightweight; easy to process, heat and UV resistant | Lighting, electronics | |
| Cyclic Olefin Copolymers (COC) | Transparent thermoplastic with good mechanical and moisture barrier properties; high stiffness and strength; may be streilized | Packaging, optical discs, lenses, medical applications | |
| Polyethylene (PE) | LDPE has good transparency and toughness; very durable | Bags, films, plastic parts; tubes | |
| Ionomer Resin | Outstanding clarity and toughness; very lightweight | Luxury decorative items that are transparent and scratch resistant; packaging; medical devices, bottles | |
| Transparent Polypropylene (PP) | Contains additives called clarifiers; have design flexibility, inexpensive and are recyclable | Storage boxes, packaging | |
| Fluorinated Ethylene Propylene (FEP) | Excellent optical properties (transmits UV, Visible, and IR radiation); most chemically inert; outstanding weathering properties | ||
| Styrene Methyl Methacrylate (SMMA) | High clarity with glossy surface; excellent thermal stability; scratch resistant; strong and stiff | Household products, glassware, medical devices | |
| Styrene Acrylonitrile Resins (SAN) | Transparent and durable, high resistance to chemicals, breakage and scratches | Appliances, furniture, automotive parts | |
| Polystyrene (General Purpose - GPPS) | Inexpensive with good clarity; high stiffness and good dimensional stability; excellent heat resistance; good electrical insulation | Toys, CD cases, shower enclosure panels, boxes, refrigerator shelves; plastic cups; disposable products; easily cracks | |
| MABS (Methyl methacrylate ABS) | High light transmittance with low haze; introduced as an alternative to PC | appliances, sporting goods, medical devices |
Physical and Chemical Properties
| Polymer | Melt Temperature C | Extrusion Temperature C | Density g/ml | RI | Visible light transmission (%) | Haze (%) | Shrinkage % | Water absorption % | Hardness Shore D | Flex. Mod. Gpa (Bending stiffness) | Tensile strength Mpa | Izod impact J/m | Coeffiient of Linear Thermal Expansion X105/C | Fire Resistance (LOI) % | Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Acrylic (PMMA) | 200-250 | 180-250 | 1.17 | 1.49 | 80-93 | 0.1-2.6 | 0.2-0.8 | 0.29-0.42 | 90-99 | 2.5-3.5 | 38-70 | 10-25 | 5-9 | 19-20 | PMMA Properties |
| Polycarbonate (PC) | 230-260 | 260-300 | 1.2 | 1.585 | 86-91 | 0.2-2.7 | 0.7-1.0 | 0.1-0.2 | 90-95 | 2.2-2.5 | 55-77 | 80-650 | 7-9 | 24-25 | PC Properties |
| Polyester Terephalate (PET) | 280-310 | 279-290 | 1.3-1.4 | 1.575 | 70-92 | 0.20-5.1 | 0.2-3.0 | 0.1-0.2 | 85-95 | 2.8-3.5 | 45-70 | 140 | 6-8 | 23-25 | PET Properties |
| Polyethylene (LDPE) | 105-115 | 0.92-0.94 | 1.476 | 4.4-94 | 1.3-27.5 | 2-4 | 0.005-0.015 | 40-50 | 0.245-0.335 | 10-20 | no break | 10-20 | 17-18 | PE Properties | |
| Polyethylene (HDPE) | 120-140 | 0.94-0.97 | 80 | 6 | 1.5-4 | 0.005-0.01 | 60-70 | 0.75-1.575 | 25-45 | 20-220 | 6-11 | 17-18 | PE Properties | ||
| Tr.Polyprop (PP) | 160-165 | 200-300 | 0.9 | 1.347 | 85-90 | 11 | 1-3 | 0.01-0.1 | 70-83 | 1.2-1.6 | 20-40 | 27-107 | 6-17 | 17-18 | PP Properties |
| Rigid PVC (Clear), unplasticized | 170-210 | 1.35-1.5 | 1.381 | 80-87 | 2.5 | 0.1-0.6 | 0.03-0.4 | 65-90 | 2.1-3.5 | 35-60 | 20-110 | 5-18 | 40-45 | PVC Properties | |
| Tr. ABS (MABS) | 210-270 | 210-240 | 1.02-1.21 | 1.52 | 86 | 3 | 0.7-1.6 | 0.5-1.8 | 100 | 1.6-2.4 | 30-48 | 20-160 | 7-15 | 19 | ABS Properties |
Resources and Citations
- Omnexus Materials Selection: List of Tranaparent Polymers