7results about How to "Improve bonded state" patented technology

Provided are a heat-sealable laminated film which has a high adhesion force at a laminated interface and has a good bonded state when being heat-sealed, and a roll obtained by rolling the heat-sealable laminated film. A heat-sealable laminated film includes a layer B, a layer C, a layer A, a layer C, and a layer B in this order. At least the layer C, the layer A, and the layer C are laminated by co-extrusion. The layer A contains 100 to 70% by mass of a polymer A1 containing 90 mol% or more and 100 mol% or less of a constitutional unit derived from 4-methyl-1-pentene with respect to all constitutional units. The layer B contains 100 to 70% by mass of a heat-sealable polyolefin B1. The layer C contains 50% by mass or more of a copolymer C1 containing 60 mol% or more and 99 mol% or less of a constitutional unit derived from 4-methyl-1-pentene and 1 mol% or more and 40 mol% or less of a constitutional unit derived from an α-olefin having 2 or more and 20 or less carbon atoms other than 4-methyl-1-pentene.

This invention provides a high-wear-resistant polyamide composite material and its preparation method. The modified carbon nanotubes of this invention, due to their nanoscale structural characteristics, can effectively exert a nano-reinforcing effect, improving the mechanical strength and anti-slip and wear-resistant properties of the polyamide composite material. On one hand, the fluoroalkyl chains grafted onto their surface improve compatibility with polytetrafluoroethylene (PTFE), while the amide groups from N,N'-methylenebisacrylamide enhance the interfacial bonding between the carbon nanotubes and the nylon matrix, effectively preventing filler agglomeration and precipitation. On the other hand, the hydroxyl groups can interact with the carboxyl groups of the nylon matrix, enhancing the material's mechanical properties and anti-slip and wear-resistant properties. Furthermore, the good interfacial compatibility of the modified carbon nanotubes improves the bonding state between PTFE and the nylon matrix, enhancing material performance. Additionally, this invention modifies glass fibers with polyethyleneimine, which facilitates their interaction with other components, further improving material performance.

The invention discloses a method for strengthening cold spraying of a metal sedimentary body through in-situ densification. The method comprises the following steps that (1) metal powder with wide particle size distribution is selected as a spraying raw material; and (2) metal powder with wide particle size distribution is deposited on the surface of a base body under the low-temperature condition under the action of accelerating gas through a cold spraying method, and a high-density metal coating or block is formed. The powder with the small particle size can be accelerated to the critical speed or above, and therefore the powder is deposited on the surface of a base body. The powder with the large particle size rebounds and cannot be deposited after being impacted, so that the compaction effect of the large particles in the process can be utilized to reduce the particle interface gaps in the deposition coating or the block, the bonding state among the particles is improved, and the cold spraying metal deposition body with higher compactness and mechanical property is prepared. According to the method, the use of high-temperature gas or expensive and non-renewable helium which has potential heat influence on the deposits can be avoided to improve the performance of the cold spraying deposits.

The invention discloses a 3D bundled Ti-TiC reinforced aluminum-based composite material, comprising an aluminum matrix, in which a 3D bundled Ti-TiC multi-level configuration reinforcement is distributed, wherein the 3D bundled Ti-TiC multi-level configuration reinforcement is sequentially arranged from the radial center outwardly, including titanium wire, a dense TiC ceramic layer, and a TiC gradient composite layer, wherein the TiC particle size in the TiC gradient composite layer gradually increases outwardly along the radial direction; the invention also discloses a preparation method of the 3D bundled Ti-TiC reinforced aluminum-based composite material, comprising preparing the 3D bundled Ti-TiC multi-level configuration reinforcement, mixing surface copper-plated aluminum powder, anhydrous ethanol, and the 3D bundled Ti-TiC multi-level configuration reinforcement, then performing vacuum drying, placing the mixture into a graphite mold, sealing it, placing it in a hot pressing sintering furnace, sintering it, cooling it to room temperature with the furnace, and finally performing aging heat treatment to obtain the 3D bundled Ti-TiC multi-level configuration reinforced aluminum-based composite material.

Provided are a heat-sealable laminated film which has a high adhesion force at a laminated interface and has a good bonded state when being heat-sealed, and a roll obtained by rolling the heat-sealable laminated film. A heat-sealable laminated film includes a layer B, a layer A, and a layer B laminated by co-extrusion in this order. The layer A contains 100 to 70% by mass of a polymer A1 containing 90 mol% or more and 100 mol% or less of a constitutional unit derived from 4-methyl-1-pentene with respect to all constitutional units. The layer B contains 99 to 30% by mass of a heat-sealable polyolefin B1 and 1 to 70% by mass of a copolymer B2 containing 60 mol% or more and 89 mol% or less of a constitutional unit derived from 4-methyl-1-pentene and 11 mol% or more and 40 mol% or less of a constitutional unit derived from an α-olefin having 2 or more and 20 or less carbon atoms other than 4-methyl-1-pentene.

The utility model relates to extrusion granulation technical field especially relates to a kind of nanometer material compression granulation equipment, including base, the upper surface of base is fixedly installed with stand, the top of stand is fixedly installed with compression box, and the top of compression box is fixedly installed with material hopper, rotation is installed in the compression box with shaft, and the outer wall of shaft is fixedly installed with the stirring rod of equidistance annular distribution, first auger rod is also rotationally installed in the compression box, and first auger rod is located below the shaft, the outer wall of one side of compression box is fixedly installed with auger cylinder, and the end of first auger rod is located in auger cylinder. The utility model has obvious advantages, spraying and stirring synergistic accelerate material polymerization;First auger rod realizes preliminary extrusion plastic forming, densification;Second auger rod completes secondary extrusion with extrusion cylinder, accurately controls granule quality;Granulation mechanism can flexibly adjust granule size shape, high efficiency and stability, satisfy multi-field demand.

The present invention relates to the technical field of brake disc preparation, and in particular provides a method for preparing a high thermal conductivity brake disc; for the high thermal conductivity brake disc prepared by the present invention, copper plating on the surface of silicon dioxide can effectively reduce the pores at the interface between SiO2 particles and a copper matrix, and improve the interface bonding state between the silicon dioxide and the copper matrix; copper plating on the surface of SiO2 particles can further improve the hardness and tensile strength of the composite material, and has good mechanical properties; the high thermal conductivity brake disc prepared by the present invention has a thermal conductivity of up to 143W / (m·K) at 300°C, greatly improved thermal conductivity, and has significantly high thermal conductivity; the high thermal conductivity brake disc prepared by the present invention has a high metal utilization rate, a short manufacturing cycle, and a low production cost.