41results about How to "Good shape recovery" patented technology

Disclosed is an absorbent laminated sheet which has excellent absorption properties, such as liquid-retaining ability, liquid-diffusing ability and capacity of holding absorbed liquid, and is highly resistant to deformations, in particular, crinkles, wrinkles and so on. The absorbent laminated sheet, which comprises a first sheet layer located in an absorption side, a second sheet layer located in a non-absorption side and a high water-absorbing polymer layer located between the first sheet layer and the second sheet layer, is characterized in that the first sheet and / or the second sheet comprise a bulky paper and said bulky paper contains heat-expandable particles that have been dispersed in the bulky paper and expanded by heating.

The purpose of the present invention is to provide an alumina fiber, and an alumina fiber aggregate constituted from such fiber, that even in harsh usage environments maintains elasticity over long periods of time and can secure a honeycomb carrier. The alumina fiber has an alumina content of 70%-98% by mass, a silica content of 2%-30% by mass, an average fiber diameter of 3.0-8.0 µm or less, and a ratio of fibers with fiber diameters exceeding 10 µm of 5% or less in terms of number of fibers. The size of mullite crystallites contained in each fiber is 10-1500 Å. By using such fibers to form the alumina fiber aggregate, problems with a retainer material for a honeycomb carrier for an automobile are solved.

The present invention aims to prevent cutting of a dicing sheet, damage to a chuck table and fusion bonding of a dicing sheet to a chuck table by laser light during laser dicing. Specifically disclosed is a laser dicing sheet which is characterized by being composed of a base made of a polyurethane acrylate and an adhesive layer formed on one side of the base.

A preparation method of a shape memory high polymer material based on thermoplastic vulcanizate comprises steps as follows: (1) a sample of ethylene-vinyl acetate copolymer / nitrile rubber thermoplastic vulcanizate is fixed on a simple tensile fixture and preheated; (2) external force is applied, so that the preheated thermoplastic vulcanizate sample deforms and then is soaked in an ice-water mixture to be set, and the distance between scale marks is recorded; (3) external force is removed, the sample is naturally placed at the room temperature for 24 hr, and the distance between scale marks isrecorded; (4) the thermoplastic vulcanizate sample in (3) is put in a heating temperature, and the distance between scale marks is recorded; (5) the SF (shape fixed rate) and the SR (shape recovery rate) of the thermoplastic vulcanizate are calculated. The prepared shape memory high polymer material based on thermoplastic vulcanizate has the advantages of being low in hardness, good in flexibility, easy to form, recyclable and low in switch temperature and is expected to be applied to sensors and self-assembly equipment.

The invention provides a spiropyran-containing photo-induced shape memory color-changing polymer and a preparation method thereof, belonging to the technical field of functional polymer preparation. The preparation method of the spiropyran-containing photo-induced shape memory color-changing polymer comprises the following steps: The polyether polyol or polyester polyol is reacted with diisocyanate to obtain a prepolymer 1 terminated with isocyanate; a chain extender is added to the prepolymer 1, and a chain extension reaction is carried out to obtain a polyurethane polymer; The polyurethane polymer reacts with the spiropyran to obtain the photo-induced shape memory color-changing polymer containing the spiropyran. Compared with the prior art, the spiropyran-containing photochromic polymer of the present invention has both the photoinduced shape memory effect and the photochromic effect, that is, the spiropyran-containing photochromic photochromic polymer has excellent performance. The shape fixation rate, shape recovery rate and discoloration rate can be widely used in information storage, anti-counterfeiting, flexible camouflage robots and other fields.

The invention relates to a medical infusion pump which comprises a support housing, wherein an infusion tube is arranged in the support housing; the support housing in the length direction of the infusion tube is set as the longitudinal direction; and the support housing in the radial direction of the infusion tube is set as the transverse direction. The medical infusion pump is characterized in that the medical infusion pump further comprises at least three pressure fingers arranged in the longitudinal direction, wherein straight tooth structures are arranged on the two transverse sides of part or the whole of the pressure fingers; a pair of support shafts is longitudinally and fixedly arranged on the two sides of each straight tooth structure; the support shafts are rotationally connected with a plurality pairs of linked power-assisted arms; a round tooth structure is arranged at one end of each linked power-assisted arm; the round tooth structures are correspondingly meshed with the straight tooth structures; when the pressure fingers are far away from the infusion tube, the round tooth structures drive one corresponding pair of linked power-assisted arms to rotate inwards, and when the pressure fingers are the furthest from the infusion tube, transverse space between centers of head parts of a pair of linked power-assisted arms is equal to or approximately equal to the outer diameter of the infusion tube; and when the pressure fingers are close to the infusion tube, a pair of linked power-assisted arms rotates outwards, and the heads of the linked power-assisted arms depart from the infusion tube.

The invention relates to a packing material for a hatch cover, and more specifically relates to a packing material for a hatch cover, which is hollow inside and thus can elastically absorb loads. The packing material for a hatch cover is characterized by comprising a first part and a second part. The first part is formed into an outer frame with a hollow inside, any one face of the upper face and the lower face is open, is made of a first rubber material, and performs elastic deformation with combination with a pressure lever of the hatch cover. The second part is formed inside the first part and is made of a second rubber material. The second part has the following forms by comprising more than two hollow structures and more than one post between the hollow structures. Therefore, according to the packing material, a shape restoration ratio can be improved through the hollow structures inside the packing material; the packing material is made by a continuous vulcanization method and can have stable cross sections, and the time for manufacturing process can be shortened when the continuous vulcanization method is compared with conventional injection moulding methods.

The invention relates to a shape self-repairing wave-absorbing material and a preparation method thereof. The method includes: (1) uniformly mixing a resin matrix, a toughening agent and a curing agent with a mass ratio of 1:(0.02-0.33):(0.01-0.017) to obtain a resin prepolymer, and the resin matrix is ​​selected from epoxy A group consisting of resin, polyurethane resin, polystyrene resin and polynorbornene resin; (2) adding ferrite powder, carbonyl iron powder, conductive carbon black, carbon fiber, silicon carbide to the obtained resin prepolymer fiber, carbon nanotubes and graphene and stir evenly to obtain a shape self-repairing absorbing resin; (3) curing the shape self-repairing absorbing resin at two or more different temperature stages to obtain a shape self-repairing absorbing resin Repair the absorbing material. The method of the invention endows the wave-absorbing material with shape self-repairing performance, and can meet the requirement of recovering the wave-absorbing performance of the wave-absorbing material after being damaged and deformed by an external force.

The invention provides a plastic particle and a yarn, the plastic particle includes shape-memory polyurethane, polyurethane and a polyurethane-type dispersant, wherein the shape-memory polyurethane is formed by the following steps: polymerizing a diisocyanate and a polyol to form a polymer, and The polymer is polymerized with a chain extender to form shape memory polyurethane. The yarn is made of the plastic pellets. The plastic particles and yarns have shape memory properties, and have good shape fixation rate, shape recovery rate, textile processability and textile applicability.

The invention relates to a cardiovascular blood flow velocity sensor, which comprises a cardiovascular bracket and a flow velocity sensor. The cardiovascular bracket is a tubular film. The flow velocity sensor is on the inside surface of the tube wall of the cardiovascular bracket. The flow velocity sensor comprises a substrate, the surface of which is coated with a coat. An electrode is arrangedat the upper side of the substrate. According to the cardiovascular blood flow velocity sensor disclosed by the invention, the production process is simple; the cardiovascular blood flow velocity sensor has good biocompatibility, higher mechanical flexibility and corrosion resistance and excellent self-expansion property; the cardiovascular blood flow velocity sensor is beneficial to working in human body stably for a long time; the real-time measurement of cardiovascular flow velocity is realized; and the problems urgently needed to be solved in clinic are solved.