From December 27 to 31, 2009, the research outcomes of three key projects under the HEMA series—namely, "Research on New Batch Intermittent Ammonia Treatment Technology and Equipment," "Bulletproof Wood Ceramics Project," and "Comprehensive Application of Military Food"—were successfully evaluated by a panel of experts from the PLA General Logistics Department, the Ministry of Oil, the China Textile Industry Association, and the China Institute of Food Science and Technology. The expert committee, composed of renowned scholars from the Chinese Academy of Engineering and industry leaders, confirmed that the technical level of all three projects reached an internationally advanced standard.
The new batch liquid ammonia treatment process and equipment have introduced an environmentally friendly method for modifying natural cellulose fibers, including hemp yarns and fabrics. This technique enables the de-crystallization of natural fibers, alters their internal structure, and reduces their modulus, while preserving their inherent properties. It also enhances their structural and functional characteristics, effectively addressing long-standing challenges in hemp textile processing and significantly broadening its application range.
For hemp yarn, liquid ammonia treatment improves elongation at break and reduces flexural modulus, making it more suitable for textile manufacturing. For hemp fabric, the treatment enhances dimensional stability, increases wrinkle recovery, improves dyeing depth and uniformity, and boosts luster, resulting in better overall performance.
The bulletproof wood ceramic project utilized hemp straw core powder as a raw material, employing optimized non-gel hot pressing and injection molding techniques to produce wood ceramic billets with controllable density, uniform cross-section, and a single-peak pore distribution. After high-temperature carbonization and reaction sintering, the green body was transformed into high-performance silicon carbide (SiC) wood ceramics, suitable for individual bullet-proof applications. These ceramics meet the requirements of military standard GJB5478-2006 for I and II-level bulletproof plates, with weights of 350 grams and 300 grams respectively. The production technology has reached pilot-scale readiness, offering improved mechanical and ballistic performance. Additionally, the project promotes the high-value utilization of low-cost, recyclable biomass resources, combining both military and economic benefits.
In the area of military food, the comprehensive application of hemp seeds involved a detailed analysis of the distribution, morphology, physical and chemical properties, and nutritional content of major hemp seed varieties in China. This study provided foundational data for the scientific utilization of hemp seed resources. For the first time, it developed products such as hemp burger compact, energy bars, solid drinks, and protein beverages tailored for military use, enriching the range of field rations. These products are also applicable in outdoor sports, triathlons, camping, emergency reserves, and survival kits. Notably, the hemp compression biscuit has been included in the Beijing Red Cross disaster relief food catalog.
Kids Sun Hats,New Era Kids Hats,Kids Sun Hats Outdoor,Bucket Hats For Kids,Children Hats For Sale
Yantai Belief Cap Co.,Ltd. , https://www.beliefcap.com