Poly II Acrylic - Mil-P-5425
What is Poly II Acrylic?
Poly II acrylic sheet is the most versatile material for aircraft glazing. Its applications span the entire spectrum of the marketplace, ranging from wing-tip lenses to edge-lit panels. Poly II is available in both clear and colors, this mthyl methacrylate polymer is preshrunk vertically or horizontally depending upon our customer's requirements.
Mil-P-5425 Sheet (aka Heat-resistant Acrylite GMS) is certified to meet or exceed Military Specification MIL-P-5425E. The sheet is preshrunk and undergoes an optical inspection which is among the most critical in the industry. Its optical qualities make it applicable to aviation windshields, wingtip lenses, instrument panels, and dust-cover applications as well as other aerospace transparent enclosures in monolithic or laminated form. Mil-P-5425 is our most versatile material for aircraft glazing. Its applications span the entire spectrum of the marketplace, ranging from wing-tip lenses to edge-lit panels.
This methyl methacrylate polymer is preshrunk vertically or horizontally depending upon our customers' requirements. Properties included improved resistance to weathering and aging.
POLY A (ASTM D-4802) is our standard unshrunk acrylic manufactured to a visual and optical aircraft specification. It is available in clear as well as transparent colors. Common applications are non-critical glazing for commercial helicopters and sport planes.
POLY FR9 is an interior acrylic material ideal for aircraft applications where low flame spread and low smoke generation are desirable.
POLY 900 is a semi-crossed-linked material formulated to meet British specifications DTD-5592.
POLY II (MIL-P-5425) military specification covering heat-resistant preshrunk, clear and colored acrylic sheet. Material supplied for conformance for this specification is identified by the name POLY II®. Polycast is qualified to furnish sheets in thickness 0.060-1.000 to meet this specification.
POLY 76 (MIL-P-8184) Is a crosslinked, preshrunk acrylic with excellent resistance to crazing, solvent attacks and thermal dimensional change. As one of few U.S. Military approved materials for stretched panels (MIL-P-25690), sophisticated applications for both military and commercial aircraft are numerous. Availability in transparent colors enhances the versatility of this product. It meets or exceeds all requirements of MIL-P-8184. Type I and II, Class 1 and 2.
POLY 84 (MIL-P-8184) is a uniquely formulated, crosslinked preshrunk acrylic specifically designed to provide superior craze and solvent resistance for today's changing environment. Improvements such as lower water absorption and increased resistance to acids expands the number of "as cast" applications. Poly 84 also meets or exceeds MIL-P-8184, Type I and II, Class 1 and 2. It's superior crazed resistance makes it ideal for monolithic windscreens, outer laminates and canopies. It is also available in transparent colors. It meets or exceeds all requirements of MIL-P-8184. Type I and II, Class 1 and 2.
POLY 2000 (MIL-P-25690) military specification covering stretched acrylic sheet specially designed from MIL-P-8184 base material.It offers enhanced craze properties and increased crack resistance. Material supplied for conformance to this specification is identified as Poly 2000™.
Properties, Applications, Availabilities, Approvals and Specifications for the Poly II Acrylic Sheet are at the bottom of this page.
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Properties, Applications, Availabilities, Approvals and Specifications for the Poly II Acrylic Sheet
|Improved resistance to weathering||Wing-tip lenses||Standard Colors: Clear and Color|
|Improved resistance to aging||Edge-lit panels|
|Residual shrinkage of less than .25%||Radar Screens|
|Meets or exceeds all requirements of MIL-P-5425|
Polycast Acrylic Sheet Meets the Test Requirements of:
ANSI Z97.I (American National Standards Institute Specification):
defines performance criteria for safety glazing used in buildings, concerning impact hardness and degredation after accelerated weathering. Polycast acrylic sheet in thicknesses greater than 0.099 are certified as complying.
ANSI Z26.I AND FMVSS 205 (Federal Motor Vehicle Safety Standard):
define performance characteristics of safety glazing of passenger cars, trailers, trucks, buses and motorcycles, including (but not limited to) impact resistance, chemical resistance, abrasion resistance, flammability, weathering and optics.
NSF Grade Sheet:
Polycast offers an acrylic sheet which meets the requirements for the National Sanitation Foundation.
Food and Drug Administration's regulations concerning food contract applications as described in 21 CFR 177.1010 for all food types, including alcoholic beverages in room temperature or refrigerated applications.
Dade County Approval:
Approved under Section 203 and 204 of the South Florida Building Code governing the use of Alternate Materials and Types of Construction.
Underwriters Laboratories recognized for flammability* of plastic materials for parts in devices and appliances. Polycast acrylic is recognized under UL 94HB, with some exceptions.
Underwriters Laboratories classified for surfaces burning characteristics of a building material. Polycast acrylic 3/8 inches and greater is classified with the following test values: flame spread = 140; smoke developed = greater than 500.
Underwriters Laboratories recognized for polymeric materials in electrical applications. Contact inside sales for further information.
Underwriters Laboratories listed for bullet-resisting equipment. Polycast offers the following in clear and bronze:
• Level 1, MP 1.25, SAR MP 1.25 Medium power, small arms resistant.
• Level 2, SAR HP 1.25 High power, small arms resistant.
• Level 3, SP 1.25 Super power, small arms resistant.
FAR 25.853 (Federal Aviation Regulation)
defines the flammability requirements for acrylic windows and signs for aircraft interiors. Polycast sheet .049" and greater meets this requirement.
FMVSS-302 (Federal Motor Vehicle Safety Standard)
defines burn rates of interior materials for passenger cars, trailers, trucks and buses. All Polycast materials meet this standard.
ASME PVHO-I and MIL-C-24449
defines the requirements for materials used in the fabrication of windows for service in pressure vessels for human occupancy. Polycast material meets these requirements.
Shipboard application of illumination and signal lighting. Defines the requirements of the material intended for use in the fabrication of lighting fixtures for Naval service. Among the associated tests are flammability, deflection temperature, flexural strength, impact strength and optical properties. Polycast material meets these requirements.
City of New York, Dept. of Buildings:
Accepted for use, City of New York, Department of Buildings, as glazing material in lieu of glass in non-rated windows, doors and in skylights in sheet thicknesses up to 3/8" maximum, and for ground, wall and roof sign combustible material, where permitted by Code. File number MEA 80-82-M.
City of New York, Board of Standards and Appeals:
Approved for use in safety glazing applications. Calendar number 1997-61-SM.
Polycast acrylic sheet .080 and greater complies with the requirements of the Consumer Product Safety Act and the CPSC Safety Standard of Architectural Glazing materials, 16 CFR 1201 for both Category I and Category II.
Polycast Acrylic Sheet Conforms to the Following Specifications (Current Edition)
defines physical properties which acrylics should meet or exceed, such as tensile strength, refractive index, specific gravity, deflection temperature, and impact strength. Polycast acrylic sheet meets or exceeds the requirements for all types of grades of sheet of this specification.
A specification covering monolithic methacrylate sheet produced by the cell-cast method. Polycast acrylic sheet in thickness .030-4.250 meets or exceeds the requirements for Category A-1, finish 1, 2, 3; Types UVA & UVT.
An S.A.E. material specification referencing specific Federal quality standards and ASTM test methods. Polycast acrylic sheet in thickness 0.030-4.250 meets or exceeds the requirements for item A, Type I, II and III, Grade A, B or C.
military specification covering modified acrylic (specially designed for superior resistance to chemical attack). Materials supplied for conformance to this specification are Polycast Poly-76® and Poly-84® (available in both Type I and II and Class 1 and 2). All products are on the Qualified Products list for this Mil-Spec.
military specification covering stretched acrylic sheet specially designed from Mil-P-8184 base material. It offers enhanced craze properties and increased crack resistance. Material supplied for conformance to this specification is identified as Poly 2000™.
military specifications covering heat-resistant, preshrunk, clear, and colored acrylic sheet. Material supplied for conformance for this specification is identified by the name POLY II®. Polycast is qualified to furnish sheets in thickness 0.060-1.000 to meet this specification.
There are many more standards, codes, and specifications to which Polycast can demonstrate compliance. Inquiries regarding your particular problems or requirements should be directed to the Polycast Marketing Department. Call 1-800-243-9002 or email email@example.com.
*This term and any corresponding data refer to typical performance in the specific tests indicated and should not be construed to imply this material's behavior under actual fire conditions.