10results about How to "Balance rigidity" patented technology

The invention aims to provide a preparation method and application of a CMC / PVA active packaging film coated with chitosan-tannic acid on the surface, and belongs to the field of food preservation. Comprising the following steps: firstly, preparing a CP40 film, and then preparing a CP40 / CT% composite film: preparing a chitosan solution with the mass concentration of 1%, adding tannic acid TA into the chitosan solution, stirring for 30 minutes in a shading manner at room temperature to form a CT coating solution, flatly laying the prepared CP40 film on a planar carrier, coating the surface of a substrate film with the CT coating solution, and putting the composite film and the carrier into a drying oven at 45 DEG C for constant-temperature drying, so as to obtain the CP40 / CT% composite film. And after the solvent of the coating layer is completely volatilized, taking out and stripping to obtain the CP40 / CT% composite film. Under the action of hydrogen bonds and electrostatic attraction, a compact network structure of an amorphous-weak crystal region is formed in the composite film, so that the interface bonding strength of the film is enhanced, and the rigidity and flexibility of the film are balanced. The physical and chemical properties and biological activity of the composite membrane are synergistically optimized, and the composite membrane has obvious degradation signs after being buried in soil for 35 days and belongs to a biodegradable material.

The invention relates to injectable cross-linked collagen gel and a preparation method thereof. Two crosslinking strategies of self-crosslinking and crosslinking agent crosslinking are fused together for the first time, and two types of amido bonds, namely amido bonds of a collagen-collagen structure (A) and amido bonds of a collagen-fatty amine-collagen structure (B), are respectively constructed through two crosslinking paths, namely catalysis of collagen polypeptide self-crosslinking and catalysis of fatty amine crosslinking, so that a hard / soft dual crosslinking network is obtained. The relative proportion of the structure A and the structure B in the final product is adjusted through a proper cross-linking process, so that the strength and the stability of the final product are adjusted and controlled, and the use requirements of different injection parts can be met.

The utility model provides a kind of power battery multi-module folding type welding cold plate structure, it is related to new energy battery technical field, including module cold plate assembly, first module cold plate and second module cold plate, the both sides of module cold plate assembly are equipped with edge, the front of edge is equipped with water outlet, the back of edge is equipped with water inlet, the end of water inlet and water outlet is equipped with sealing ring, the outside of module cold plate assembly includes cold plate outer wall, power battery multi-module folding type welding cold plate structure is designed by three kinds of assembly forms of module cold plate assembly, and the cooling demand of different battery module can be flexibly adapted. In the first form, first module cold plate and second module cold plate are integrated by welding and form sealing, internal S-shaped support septum is connected to form limiting step, provide high rigid support, suitable for high-strength battery module scene;The flexible of the second form of partition type design and reserved gap is enhanced, and the large deformation caused by cell expansion is adapted.

The application belongs to the technical field of pipe materials, and relates to a high-temperature-resistant and high-wear-resistant pipe and a preparation method thereof. The high-temperature-resistant and high-wear-resistant pipe is a composite pipe with double-layer materials, which is composed of a POK inner pipe as an inner layer and a PE outer pipe as an outer layer. The POK inner pipe as the inner layer is obtained by extruding and shaping POK material after melt blending of POK resin, toughening agent, ABS cooling agent, antioxidant and lubricant at a temperature range of 200-240 DEG C. The PE outer pipe as the outer layer is obtained by extruding and shaping PE material after melt blending of PE resin, antioxidant and lubricant at a temperature range of 170-210 DEG C. The PE pipe as the outer layer tightly wraps the POK pipe as the inner layer, and the POK inner pipe as the inner layer and the PE outer pipe as the outer layer are tightly attached. Compared with the prior art, the application has the advantages of excellent high-temperature-resistant and high-wear-resistant performance, anti-aging performance and high-impact resistance, and low production cost.

This invention provides a high-hardness, scratch-resistant, water-based two-component polyurethane matte black base coat, its preparation method, and its application. The two-component matte black base coat comprises component A and component B. Component A includes a water-based hydroxyl polyurethane acrylic dispersion, a water-based hydroxyl acrylic dispersion, hydroxyl microspheres, a high-pigment carbon black paste, water-based additives, a film-forming aid, and water. Component B includes a curing agent and a diluent. The matte black base coat of this invention exhibits high hardness, scratch resistance, and chemical resistance. It also demonstrates excellent workability, activation period, and surface finish, making it suitable for water-based two-component matte black base coat systems. It is particularly suitable for decorative and protective applications in the plastic paint industry, such as 3C consumer electronics, where extremely stringent requirements for abrasion resistance, scratch resistance, and chemical resistance are necessary.

This invention relates to the field of polymer materials technology, specifically disclosing an epoxy resin potting compound and its preparation method. The epoxy resin potting compound comprises the following raw materials: 40-50 parts of epoxy resin matrix, 8-12 parts of reactive diluent, 3-6 parts of core-shell toughening agent, 40-45 parts of nanofiller, 12-16 parts of curing agent, and 1-1.5 parts of curing accelerator. The preparation method includes: S1, mixing and stirring the epoxy resin matrix, reactive diluent, core-shell toughening agent, and nanofiller until homogeneous to obtain a mixture; S2, adding the curing agent and curing accelerator to the mixture and continuing to stir until homogeneous to obtain the epoxy resin potting compound. The epoxy resin potting compound prepared by this invention exhibits excellent impact resistance, weather resistance, and salt spray corrosion resistance, while maintaining good tensile strength and electrical insulation properties, significantly improving the reliability and service life of electronic component packaging.

The utility model provides an elastic sheet structure for a connector. The elastic sheet structure comprises a metal-sheet-shaped base body; the base body is provided with a first bent part, a second bent part, a third bent part, a fourth bent part and a fifth bent part which are sequentially arranged in the length direction. The first bending part is bent to form a semicircle, the semicircle part of the first bending part is provided with a stress buffer hole, and the tail end of the fifth bending part is provided with an arc-shaped contact salient point; a guide channel with an opening gradually reduced from outside to inside is formed between the fifth bending part and the base body, and the fifth bending part forms a guide inclined plane; and the fifth bending part is used for being elastically plugged with an external connector. According to the utility model, the problems of stress concentration, unstable contact, easy deformation, infirm installation and the like of a traditional elastic sheet structure are solved, the combination of high reliability, long service life and low-cost manufacturing is realized, and the elastic sheet is suitable for the field of precision electronic connectors.

The invention relates to the technical field of medical polymer materials, and particularly discloses a nylon material for a medical catheter as well as a preparation method and application of the nylon material. The nylon material for the medical catheter is mainly prepared from the following raw materials in percentage by weight: 80-90% of nylon resin, 8-12% of organic grafted SEBS (Styrene-Ethylene-Butylene-Styrene) and 2-8% of an anticoagulant, the nylon resin is selected from nylon 12 and nylon 6, and the weight ratio of the nylon 12 to the nylon 6 is (6-8): (2-4); the organic grafted SEBS is obtained by treating SEBS resin by adopting maleic anhydride, 2-acrylamido-2-methylpropanesulfonic acid and hydroxyethyl methylacrylate. Through mutual cooperation of the raw materials, the nylon material has the advantages of high tensile strength, high elongation at break, good anticoagulation performance, good platelet adhesion resistance and high biological safety, achieves balance in mechanical properties, blood compatibility and biological safety, and meets the requirements of medical catheters.

This invention provides a carboxyl-terminated modified polyamide toughening agent, its preparation method, and its application. The carboxyl-terminated modified polyamide toughening agent comprises the following components in parts by weight: 55-70 parts of dimer acid, 5-12 parts of aliphatic diamine, 5-15 parts of aromatic dicarboxylic acid, 2-8 parts of modified monomer, 0.1-0.5 parts of catalyst, and 0.2-1 parts of antioxidant. The carboxyl-terminated modified polyamide toughening agent obtained by this invention, when applied to powder coatings, exhibits good flexibility and impact strength, achieving a balance between flexibility and rigidity; it has good boiling water resistance, without defects such as blistering, peeling, discoloration, or loss of gloss; and it has good solvent resistance, resulting in a high gloss retention rate for the coating.

The present invention aims to provide a polyphenylene ether-based resin composition which is excellent in heat aging resistance in the vicinity of 110°C to 140°C, and has a balance of rigidity and toughness and a good molded appearance. The polyphenylene ether-based resin composition of the present invention is characterized in that it contains a polyphenylene ether (A), an antioxidant (C), a metal oxide and / or a metal sulfide (D), and a lubricant (E), and optionally a styrene-based resin (B), and the mass ratio of each component is: the (A) component 10 to 95 mass parts, the (B) component 0 to 80 mass parts, the (C) component 0.05 to 3 mass parts, the total of the (D) component and the (E) component 0.1 to 3.5 mass parts, and the mass ratio of the (D) component to the (E) component is (D) component / (E) component = 80 / 20 to 55 / 45, with respect to the total of 100 mass parts of the above-mentioned (A) component, the above-mentioned (B) component, the above-mentioned (C) component, the above-mentioned (D) component, and the above-mentioned (E) component.