4results about How to "Improve interlayer bond strength" patented technology

The application discloses PBS laminating material and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The PBS laminating material comprises a functional layer A and an adhesion layer B which are directly attached to each other, the functional layer A comprises polyglycolic acid, surface modified bamboo powder, a multifunctional epoxy compatibilizer, a carbodiimide stabilizer, an antioxidant, a nucleating agent, a laminating rheological aid and a polybutylene succinate-based resin, and the adhesion layer B comprises a functional polybutylene succinate-based adhesion resin, a multifunctional epoxy chain extender, an antioxidant and PBS and / or PBSA. In the preparation, the PBS-based resin is first made into a continuous phase, then the surface modified bamboo powder is pre-wetted and dispersed, and then the PGA is added in the later stage and the residence time is controlled, so that the obtained material has high rigidity, good film forming stability, paper base adhesion and heat sealing performance, and is suitable for food packaging paper, paper cups, paper bowls, express packaging paper and paper-based heat sealing packaging.

The present application relates to a kind of polyurethane materials with photothermal self-repairing performance, the polyurethane material is prepared by diisocyanate, macromolecular dihydric alcohol, small molecule dihydric alcohol chain extender, photothermal agent, catalyst, solvent, it is used as 3D printing material. When 3D printing is carried out using the material, the photothermal performance of the material is used, the deposited layer is irradiated with light along the printing path in the FDM printing process, to improve the temperature of previous deposited layer, solve the problem of previous deposited layer rapid cooling in prior art;The temperature of previous deposited layer is improved, so as to activate the self-repairing performance of 3D printing material, then enhance the interlaminar bonding strength between adjacent filaments, and finally realize the mechanical enhancement and mechanical isotropy of FDM printing product.The polyurethane material of the present application helps to widen the practical application of FDM printing product in engineering field.

The application relates to the technical field of building materials, and discloses a composite wallboard and a preparation method thereof, the method comprising base layer preparation, intermediate functional layer preparation, finishing layer preparation, and compounding and post-processing; the composite wallboard is designed as a base layer, an intermediate functional layer and a finishing layer composite structure, each layer is composed of specific raw materials, the interface bonding and the functional component distribution of each layer material are synergistically optimized, the performance requirements of light weight, high strength, heat preservation and heat insulation, fire resistance and flame resistance can be considered, and the realization of the multifunctional integration of the composite wallboard is ensured; after the interfaces of each layer are treated by plasma, epoxy resin adhesives are coated, the chemical bonding of the interfaces between the layers is enhanced, the interlayer bonding strength is improved, the problem of delamination and falling in the long-term use process is avoided, and the structural integrity of the composite wallboard is ensured.

The application provides a kind of anti-freezing high-performance concrete for building 3D printing and a preparation method thereof, the concrete contains cement 80-100 parts by mass, fly ash 80-100 parts, slag powder 220-270 parts, silica fume 15-30 parts, fine aggregate 1200-1500 parts, and polycarboxylic acid high-performance water reducing agent, thickening agent, polypropylene fiber and / or modified cellulose ether, water-binder ratio 0.55~0.67, fine aggregate is natural sand, granite waste sand or mixture thereof, replacement rate 0%~100%. During preparation, accurate measurement, dry mixing, solution preparation, wet mixing fluidization, high-speed slurry, printing forming and moisture curing are carried out. The application adopts microstructure self-optimization active anti-freezing design, without coarse aggregate, which greatly reduces carbon emission, the anti-freezing grade of concrete reaches F125-F150, with excellent printability and mechanical properties, without printing head blockage problem, the preparation process is controllable, and is suitable for building 3D printing engineering in cold and seasonal freeze-thaw areas.