36results about How to "Heat shrinkable" patented technology

The invention belongs to the technical field of polymer materials and particularly relates to polyarylamide with a dibenzo 8-membered ring (DBCOD) structure containing main chain and a preparation method thereof. The invention also relates to DBCOD-containing diacids: 5, 6, 11, 12-tetrahydro dibenzo [a, e] [8] annulene-2, 8-dicarboxylic acid and 5, 6, 11, 12-tetrahydro dibenzo [a, e] [8] annulene-2, 9-dicarboxylic acid and a preparation method thereof. According to the preparation method of the polyacrylamide, a Yamazaki-Higashi phosphorylation condensation polymerization is adopted and the thermal shrinkage coefficient of the polyarylamide is adjusted through changing the feeding proportion of diacid monomers in the preparation process. The polyacrylamide provided by the invention has excellent solution film forming property and thermal stability and especially unique reversible thermal shrinkage and cold expansion characteristics, which are related to the conformation change of 8-membered rings; and the polyarylamide can serve as a thermal shrinkage material.

The invention discloses a steel-belted aerial tire with the skeleton material of nylon-kelvar composite cord, which is mainly characterized in that the carcass ply is composed of multi-layer nylon 66 cords or nylon-kelvar composite cords. The belt structure layer is composed of at least more than two layers of nylon-kelvar composite cords. A tire tread structure layer is arranged above the belt structure layer, in which the nylon-kelvar composite cord is also applied. Both ends of the carcass ply cord layer are wound with a pair of left and right wire loops and counter wrapped upward. The belt structure layer is composed of the invert folded cords, in which the curling ends are all in the middle of the tread of tire. This aerial tire has the advantages that (1) the nylon-kelvar composite cord is taken as the skeleton material of the tire so that the fine characteristics of the nylon-kelvar composite cords are reflected, in which a good basis is laid in order to meet the using requirements of the steel-belted aerial tire. (2) With the belt structure layer of multi-layer nylon-kelvar composite cords, the high internal pressure, high-speed, high-load, large deformation and impact resistant use requirements of the steel-belted tire can be met.

A label paper with high stability is composed of a thermoshrinkable plastic film, a pressure-sensitive adhesive layer and a parting paper layer. Its preparing process is also disclosed.

A polyvinyl chloride pipe with radial and/or longitudinal thermal directional shrinking memory function is prepared from polyvinyl chloride through shaping pipe, blocking both ends, arranging it in a limiter, filling high-pressure air in while heating it for expansion, cooling and releasing pressure.

The invention provides a flame-retardant PET heat-shrinkable sleeve, which is prepared from a reinforced flame-retardant PET material. The reinforced flame-resistant PET material is prepared by the following method: prepare raw materials according to the following ratio, PET 60-70 parts by weight of slices, 5-10 parts by weight of flame retardant, 1-3 parts by weight of antioxidant, 1-3 parts by weight of toughening agent, add in a high-speed mixer and mix uniformly, then add glass fiber as a reinforcing agent; The mixed material is sent into a twin-screw extruder for melt blending and extrusion, and the extruded material is water-cooled, drawn and stretched, and pelletized by a pelletizer to obtain a reinforced flame-retardant PET material; wherein the flame retardant is A compound of decabromodiphenyl ether and antimony trioxide; the toughening agent is ethylene-butyl acrylate-glycidyl methacrylate trisalt copolymer; the PET chips are pre-dried at 120°C 4h; the flame retardant and glass fiber are pre-dried at 120°C for 1h. The invention has the following technical effects: it has heat shrinkability and enhanced flame retardancy at the same time.

The invention relates to image forming devices such as a copier, a printer, a fax machine and a plotter, a charging unit used in the image forming devices and a manufacturing method for the charging unit, a processing cartridge and a setting method for charge gap. A charging roller 14 comprises a metal core 101 as a conductive support, a charging layer 102 made of conductive resin material, sheet-like gap holding component 103 provided between two ends of the charging layer 102. The gap holding component 103 is connected with a photosensitive layer 5b out of an image region 5a of a photoreceptor 5. Average value of the charging gaps when environmental temperature is 10 DEG C, 20 DEG C or 30 DEG C are respectively set as G10, G20, G30, satisfying the following condition: |G30-G10| X 5 is less than G20. Even in the event that a measurement device and a regulation device for the charging gaps are not provided, environmental variation of the charging gaps can still be reduced to realize high durability at low cost.

The present invention provides weather and use-protected golf course equipment, and methods of extending the useful life golf course equipment by protecting it against weather and use, via application of a heat shrinkable material onto the equipment.

The invention discloses an ultra-flexible flat cable wiring harness network for aerospace. The ultra-flexible flat cable wiring harness network comprises a first wiring harness, a second wiring harness and a third wiring harness, which are formed in a crosslinked ethylene-tetrafluoroethylene copolymer carrier layer by extrusion molding, wherein the first wiring harness, the second wiring harness and the third wiring harness are formed by twisting 0.15mm pair twisted shielded wires and 0.3mm pair twisted shielded wires into beams and each beam is sequentially coated with a woven suture layer and an anti-tear silicone rubber protection layer on the periphery, wherein a wrapping layer, a polyolefin physical foaming layer, a woven layer and a crosslinked ethylene-tetrafluoroethylene copolymer outer sheath layer are coated at the outside of the crosslinked ethylene-tetrafluoroethylene copolymer carrier layer in sequence. The ultra-flexible flat cable wiring harness network disclosed by the invention is novel in structural design, the cable has flexibility and bending resistance, the operation of branch welding and other subsequent procedures is implemented easily, and the ultra-flexible flat cable wiring harness network has the advantages of high and low temperature resistance, weight, thermal shrinkage, excellent mechanical properties, salt mist resistance, dampness and heat resistance, excellent high-energy electron radiation resistance, and can improve the reliable energy and signal transmission in harsh environments.

The invention provides an insulation anti-corrosion heat shrinkable casing pipe material and a preparation method thereof. The heat shrinkable casing pipe material is prepared from 70 to 95 parts by weight of polyvinyl chloride, 30 to 50 parts by weight of thermosetting liquid polyimide pure resin, 4 to 7 parts by weight of vapor phase growth nano-carbon fiber powder, 6 to 10 parts by weight of aninsulating composite material, 2 to 4 parts by weight of polytetrafluoroethylene micropowder, 2 to 4 parts by weight of phthalic anhydride, 3 to 6 parts by weight of a silane coupling agent, 3 to 7 parts by weight of epoxy soybean oil, 4 to 7 parts by weight of liquid paraffin, 5 to 9 parts by weight of polyethylene glycol 400 and 0.5 to 0.9 parts by weight of a compatibilizer. The preparation method comprises: S1, raw material preparation, S2, premixing of the polytetrafluoroethylene micropowder, phthalic anhydride, silane coupling agent, vapor phase growth nano-carbon fiber powder and insulating composite material, S3, mixing, and S4, extrusion, molding and drying. The heat shrinkable casing pipe material is excellent in insulation, corrosion resistance, high temperature resistance andthermal expansion and contraction performance.

The invention provides a flame-retardant PET heat-shrinkable sleeve, which is prepared from a reinforced flame-retardant PET material. The reinforced flame-resistant PET material is prepared by the following method: prepare raw materials according to the following ratio, PET 65-75 parts by weight of slices, 1-5 parts by weight of reinforcing agent, 1-5 parts by weight of flame retardant, 1-3 parts by weight of antioxidant, add in a high-speed mixer and mix uniformly; send the compound into a twin-screw extruder Melt blending and extruding, the extruded strips are water-cooled, drawn and stretched, and pelletized by a pelletizer to obtain a reinforced flame-retardant PET material; wherein, the reinforcing agent is a mixture of nano-barium sulfate and nano-montmorillonite ; The flame retardant is microcapsule red phosphorus; the PET chips, reinforcing agent and flame retardant are pre-dried at 100° C. for 10 h. The invention has the following technical effects: it has heat shrinkability and enhanced flame retardancy at the same time.