Title 46
SECTION 164.120-7
164.120-7 Acceptance criteria.
§ 164.120-7 Acceptance criteria.(a) The laminating resin must pass the inspections and tests specified in this section. The inspections and tests required by this section, including weathering of samples, are the responsibility of the manufacturer and must be performed by an independent laboratory.
(1) Polyester resins. (i) The resin must meet the specifications of Grade A, Class O resin of MIL-R-7575C (incorporated by reference, see § 164.120-5 of this subpart) and meet the specifications conforming to Grade A (standard flame resistance) of MIL-R-21607E(SH) (incorporated by reference, see § 164.120-5 of this subpart).
(ii) MIL-R-21607E(SH) Grade B resins will be given consideration upon request.
(2) Vinyl ester resins. The resin must meet the specifications of Grade B (fire retardant) resin of MIL-R-24719(SH) (incorporated by reference, see § 164.120-5 of this subpart) and must be tested and meet the requirements of weathering and post-weathering mechanical testing as shown in Table 164.120-7 of this section. Samples for the weathering must be prepared in accordance with MIL-R-7575C paragraph 4.3.1.1.
(3) All other resins. Each resin formulation submitted for Coast Guard approval, other than those addressed in paragraphs (a)(1) and (2) of this section, must be tested and meet the requirements of Table 164.120-7 of this section.
(b) [Reserved]
Table 164.120-7 - Alternative Test Method Standards for Laminating Resins for Use in Lifeboats, Rescue Boats, and Other Lifesaving Equipment 1
| Property | Test methods |
|---|---|
| (c) Material Identification Tests 2 | |
| (1) Uncatalyzed Liquid Resin: | |
| (i) Specific gravity | ISO 1675 or ASTM D 1045. |
| (ii) Viscosity | ISO 2555 or ASTM D 1824. |
| (iii) Acid number | ISO 2114 or ASTM D 1045. |
| (2) Catalyzed Resin: | |
| (i) Max gel time | ISO 2535 or ASTM D 2471. |
| (ii) Peak exotherm | ASTM D 2471. |
| (3) Cured Unfilled Resin: | |
| (i) Barcol hardness | ISO 2039-2 or ASTM D 2583. |
| (ii) Specific gravity/density | ISO 1183 or ASTM D 792. |
| Property | Test method | Requirements 3 |
|---|---|---|
| (d) Lengthwise Mechanical & Physical Properties of Glass Cloth Base Plastic Laminate | ||
| (Lengthwise direction of test specimens is parallel to the warp direction of glass fabric.) | ||
| (1) Tested Under Standard Conditions: | ||
| (i) Ultimate strength, flatwise | ISO 14125 or ASTM D 790 | 345 MPa (50,000 lb/in 2). |
| (ii) Initial modulus of elasticity, flatwise | ISO 14125 or ASTM D 790 | 18,616 MPa (2.7 × 10E6 lb/in 2). |
| (iii) Ultimate tensile strength | ISO 527 or ASTM D 638 | 278 MPa (40,000 lb/in 2). |
| (iv) Ultimate compressive strength, edgewise | ISO 604 or ASTM D 695 | 241 MPa (35,000 ln/in 2). |
| (v) Fire retardant | MSC Circ. 1006 | Pass. |
| (vi) Water absorption, 24-hour immersion | ISO 62 or ASTM D 570 | 0.5% max change in weight. |
| (vii) Barcol hardness | ISO 2039-2 or ASTM D 2583 | 55. |
| (viii) Specific gravity/density | ISO 1183 or ASTM D 792 | (2). |
| (ix) Resin content, percentage | ISO 1172 or ASTM D 2584 | (2). |
| (2) Tested Under Wet Conditions (Specimens must be immersed for 2 hours in boiling distilled water as per ASTM D 570 paragraph 7.5. The specimens must then be cooled in water at 23 °C and tested wet at standard conditions immediately after removal from the water.): | ||
| (i) Ultimate strength, flatwise | ISO 14125 or ASTM D 790 | 310 MPa (45,000 lb/in 2). |
| (ii) Initial modulus of elasticity, flatwise | ISO 14125 or ASTM D 790 | 17,237 MPa (2.5 × 10E6 lb/in 2). |
| (iii) Ultimate tensile strength | ISO 527 or ASTM D 638 | 278 MPa (40,000 lb/in 2). |
| (iv) Ultimate compressive strength, edgewise | ISO 604 or ASTM D 695 | 241 MPa (35,000 ln/in 2). |
| (3) Tested Under Elevated Temperature Conditions (Specimens must be exposed to 70 °C for 1 hour and tested at that temperature.): | ||
| (i) Ultimate strength, flatwise | ISO 14125 or ASTM D 790 | 276 MPa (40,000 lb/in 2). |
| (ii) Initial modulus of elasticity, flatwise | ISO 14125 or ASTM D 790 | 15,858 MPa (2.3 × 10E6 lb/in 2). |
| (4) Tested After Exposure to Liquid Chemicals (Standard test chemical reagents.) | ||
| (i) Change in mass & dimensions | ISO 175 or ASTM D 543 | 0.1% max. |
| (ii) Ultimate strength | ISO 14125 or ASTM D 790 | (2). |
| (5) Tested After Weathering (Specimens must be weathered by either: 1 year per MIL-R-7575C or 500-hour exposure per ASTM G154 Table X2.1 Cycle 1 or 3.): | ||
| (i) Ultimate strength, flatwise | ISO 14125 or ASTM D 790 | 310 MPa (45,000 lb/in 2). |
| (ii) Initial modulus of elasticity, flatwise | ISO 14125 or ASTM D 790 | 17,237 MPa (2.5 × 10E6 lb/in 2). |
| (iii) Fire retardant | MSC Circ. 1006 | Pass. |
1 Each standard in this table is incorporated by reference, see § 164.120-5 of this subpart.
2 There are no requirements for these properties, but the values must be determined and reported. Calculations for ultimate flexural strength after immersion in chemical fluids must be based on the dimensions of the specimens before immersion.
3 The specimens must show no cracking, crazing, softening, delamination, or any other visible deterioration after conditioning exposure or immersions.