Military Bulletproof Helmet Aramid Fast Styles Helmet with High Ballistic Performance
PTMEG based polyurethane prepolymer are recommended for applications where parts undergo dynamic stress, etc, they incur lower heat build-up.
Product Introduction
Since the establishment of our company, we are in line with the business purpose of 'reducing costs, ensuring quality, paying attention to credibility, timely delivery', and our Casting Polyurethane Elastomer, Polyurethane Rubber Parts, Flame Retardent Zinc Borate are exported to many countries and regions. Backed by strong technical force and perfect service network, we establish rapid pre-sale, sale and after-sale service system and vigorously promote the construction of service network. Our company's production capacity and technical level are in an advanced position in the same industry. We sincerely hope to continue to develop more extensive and cordial exchanges and cooperation with friends from all walks of life for mutual benefit and win-win situation.
Product Features
PTMEG based polyurethane prepolymer are recommended for applications where parts undergo dynamic stress, etc, they incur lower heat build-up. They also have advantages in high resilience, low temperature performance and resistance to water attack(hydrolysis). Polyethers also have lower viscosity and specific gravity，and MDI based products have lower isocyanate odour than similar TDI types and have superior hydrolysis resistance and often have higher resilience.
With high NCO content and catalyst intervention, the reaction rate of MDI feedstock is 1-2 times faster than that of TDI series feedstock.Because of the high resilience and flexibility, MDI series products are much better than TDI series products in the application effect of sieve plate. The improvement of elasticity is helpful to improve the impact wear resistance and self-cleaning effect of products.
Because of the high activity of MDI, the application temperature of MDI raw materials is much lower than that of TDI series raw materials in order to prevent the degradation of physical properties of final products caused by self-polymerization of raw materials. The thermal stability and temperature resistance of MDI materials are lower than that of TDI series. The main reason is that the crystallinity and temperature resistance of MOCA, the basic material of TDI series, are better than those of MDI chain extender BDO.
Specifications
Type | HJ2285M | HJ2290M | HJ2295M |
NCO content /% | 6.0±0.2 | 7.5±0.2 | 8.8±0.2 |
Appearance in 20℃ | PTMEG type，white solid | ||
1,4-BD dosage (100gPUP )/g | 6.2 | 7.7 | 9.1 |
Viscosity(85℃)/mPa·s | 1300-1500 | 900-1100 | 750-850 |
Mixing temperature/℃（PUP/1,4BD） | 85/40 | 85/40 | 80/40 |
Catalyst addition dosage (1000gPUP)/g | 3-10 (the addition amount varies according to the gel time requirement) | ||
Gel time /min | 8—10 | 5—7 | 4—6 |
Vulcanization Time (100-110℃)/h | 24-48 | 24-48 | 24-48 |
Hardness（shore A） | 85±2 | 90±2 | 95±2 |
Tensile strength/MPa | 34-39 | 37-42 | 43-48 |
100% Modulus /MPa | 4—6 | 5—8 | 10—14 |
300%Modulus /MPa | 10—15 | 13—18 | 20—30 |
Elongation at break/ % | 360-460 | 560-660 | 440-540 |
Tear strength（KN/m） | 60-70 | 95-105 | 105-115 |
Rebound/ % | 48-50 | 46-48 | 45-47 |
Specific gravity（25℃）（g/ cm3） | 1.11 | 1.11 | 1.12 |
DIN Abrasion loss /mm³ | ≤38 | ≤35 | ≤32 |
Our Military Bulletproof Helmet Aramid Fast Styles Helmet with High Ballistic Performance have long been popular in the domestic market and exported to many overseas countries and regions. Our company has established a corporate governance structure that meets regulatory requirements and international rules since the beginning of our establishment. We continuously innovate management system and operation mechanism to stimulate team and enterprise vitality.
Hot Tags: mdi two componment ptmeg type casting pu, China, manufacturers, factory, buy, Polyester Type MDI System Polyurethane Elastomer, Two Componment Polyether Based Polyurethane Prepolyer, MDI Two Componment Polyester Type Casting PU, Flame Retardent Zinc Borate, PU Square Pad, PU Color Stick
[[ProKeywords]]
