Realize the synchronous development of the quality of polyamide fiber industry, develop the key technology of flexible and efficient preparation of polyamide with independent intellectual property rights, solve the key technical problems such as polyamide process innovation, key device development and product development, and significantly improve polyamide6The development level of fiber in efficient preparation and flexible products has enhanced the original innovation ability of polyamide fiber industry.
1）R&D direction
The formation of cyclic oligomer and the strengthening mechanism of kinetic process in the hydrolytic ring opening polymerization of caprolactam were studied, and the low-temperature ring opening and efficient gas phase devolatilization and viscosity increasing technology were developed to realize polyamide6The oligomer is effectively inhibited during polymerization, which is polyamide6Provide technical solutions for melt direct spinning; Disclose the dispersion and migration mechanism of the added modified component in the high viscosity melt, the spinning dynamics and structure evolution mechanism of the differential functionalized polyamide, and develop the polyamide6Filament loop blowing and other modular equipment and fiber profile, fine denier, shrinkage, strength coordinated control technology; Spinning grade polyamide6Key technologies such as continuous preparation, high efficiency cracking and reuse of extraction concentrate; According to the actual application requirements, research the differential polyamide filament composite, dyeing and finishing, weaving process, and achieve large-scale application in clothing, home textile and other fields.
2）R&D progress and achievements
Developed polyamide6The low temperature ring opening and high vacuum post polycondensation segmented polymerization process technology are adopted to establish a melt direct spinning continuous polymerization device under the same polymerization conditions, establish a quantitative relationship between the polymerization process and the content of cyclic oligomer, so as to achieve polyamide6Continuous production; On the basis of continuous polymerization, a flat plug flow melt conveying pipeline is designed to realize liquid phase viscosity increasing during melt conveying after caprolactam ring opening; After liquid phase viscosity increasing, the melt pipe is directly connected with the melt spinning machine for spinning to achieve polyamide6Melt spinning. Complete the design and trial production of the continuous device from caprolactam to polyamide fiber, and realize the control of the content of cyclic oligomer. Expected polyamide6Relative viscosity 2.4-2.8, oligomer content<2%, cyclic dimer content<0.3%。 Form industrialization plan.
Research and development of polyamide6Polymerization process oligomer technology, development of polyamide6Key technologies and products of copolymerization, developed polyamide elastomer fiber and flame retardant polyamide6Fiber, cationic dyeable polyamide masterbatch and fiber; Design efficient flexible polyamide6Fiber engineering technology, development of fine denier, profiled and other series of differential and functional polyamides6Fiber; Forming polyamide6Complete technology of fiber manufacturing, dyeing and finishing. At the same time, the project focuses on polyamide6On the basis of efficient fiber preparation technology, further realized the development of flexible products and formed a cool sensitive and UV resistant polyamide6Fiber and cloth, flame retardant polyamide6Fiber products, cationic dyeable polyamide6Fiber and other functional products.
Cooperate with Donghua University to focus on high-quality nylon6Key technologies and scientific issues in the preparation of elastic filament are studied as follows①Glycol differential ester exchange method based on independent design Synthesis of nylon with different structures6Elastomer, studying the serial structure, phase structure and heat of elastomer Structure activity relationship of mechanical properties, while constructing nylon6Elastomer stable synthesis technology;②Design and development of nylon6The special melt spinning technology for elastic yarn realizes the unity of its strength and elasticity;③Using synchrotron radiation dynamic characterization technology and in situ stretching device, nylon was studied6The structure change rule of soft phase and hard phase of elastic fiber under the action of multiple physical factors, and the elastic mechanism of fiber is clarified;④Develop nylon6Study on the application properties of elastic yarn,It provides theoretical support for subsequent applications.
Jointly developed with Yiwu Huading, a shareholder, and studied polyamide6Key technologies such as micro modification, multi-point addition modification of spinning, spinning flexibility, etc. High efficiency cracking and reuse technology of extraction concentrate has been developed, which integrates online addition, monomer suction, replacement and blowing, and develops the coloring and total extinction (titanium dioxide content≥1.6%）And its multi-functional composite and fiber splitting master wires (monofilament specification:0.5dtexBelow), medium and high strength polyamide6Fiber and other new products. Build 10000 ton polyamide6The flexible fiber production line is widely used in downstream clothing, home textile and other fields.
Jointly developed with Yongrong Jinjiang, a shareholder, to introduce silver loaded mesoporous titanium dioxide nanocomposites into polyamide as anti-virus materials6In the material, polyamide with anti-virus function is prepared by spinning6Fiber, annual production capacity of production line scale1000Tons.
Own authorized invention patent3A kind of nylon6Preparation method of polyamide ester fiber6Polymer and its preparation method, A kind of biodegradable polyamide6Copolymer and its preparation method. Provide polyamide to partners66Patent navigation analysis service, form patent analysis report and other related materials, analyze patent early warning and barriers of key generic technologies, propose risk response strategies and breakthrough path suggestions, provide intellectual property rights and industrial layout guarantee for enterprise development, and provide strength support for innovation and upgrading of fiber industry.
3）Medium test certificate
The Center and Donghua jointly carry out polyamide fiberDirect spinning andFlexibilitytechnologyBasic research, forming various technical achievements and process packages, and conducting pilot test in Zhejiang Hengyi Petrochemical Co., Ltd.