798 results about "Polyaryletherketone" patented technology

A surgical implant and a method for manufacturing the same. The surgical implant has a body comprising polyaryletherketone (PAEK). Said polyaryletherketone is a homopolymer and a first section of the body comprises a polyaryletherketone that has a crystallization peak in its DSC-curve.

A three-dimensional object is manufactured by selective sintering by means of electromagnetic radiation, wherein the powder comprises a polymer or copolymer having at least one of the following structural characteristics:

• • (i) at least one branching group in the backbone chain of the polymer or copolymer, provided that in case of the use of polyaryletherketones (PAEK) the branching group is an aromatic structural unit in the backbone chain of the polymer or copolymer;
  • (ii) modification of at least one end group of the backbone chain of the polymer or copolymer;
  • (iii) at least one bulky group within the backbone chain of the polymer of copolymer, provided that in case of the use of polyaryletherketones (PAEK) the bulky group is not selected from the group consisting of phenylene, biphenylene, naphthalene and CH₂— or isopropylidene-linked aromatics;
  • (iv) at least one aromatic group non-linearly linking the backbone chain.

A high strength multi-layer polymeric article having a low wear surface includes a base polymer layer, and a polymer composite capping layer disposed on the base polymer layer. The capping layer includes a first polymer including a transfer film forming polymer, and a second polymer different from the first polymer for strengthening this polymer composite mixed with the first polymer. The first polymer provides at least 10 weight % of the composite capping layer. A transition layer composite including the first and second polymer is interposed between the capping layer and the base polymer layer, at least a portion of the transition layer providing a non-constant first or second polymer concentration. A wear rate of the article is <10⁻⁷ mm³/Nm. The first polymer can be PTFE and the second polymer can be a polyaryletherketone (PEEK).

The invention belongs to the technical field of polymer material, and relates to a method, used in a production process, for reducing metal impurities in poly(aryl ether ketone). The method comprises the following steps: 1) purification: fully mixing poly(aryl ether ketone) with hydroxy ethidene diphosphonic acid aqueous solution with mass concentration of 0.1-2% at 40-100 DEG C for 0.5-3 h, wherein time for mixing and stirring is preferably 1-2 h, and filtering; 2) washing: washing the purified poly(aryl ether ketone) with distilled water, until conductivity of the aqueous solution is below 20 muS / cm; and 3) drying: drying the washed poly(aryl ether ketone) at 120-140 DEG C for 4-6 h to obtain poly(aryl ether ketone) with metal impurities removed. The method can not only reduce content of the metal impurities in the poly(aryl ether ketone) and improve product quality; besides the used reagents have excellent chemical stability, small dosage, and no self toxicity or pollution, can be treated with biochemical degradation in a later period of production, and will not harm the environment.

By a temper treatment a polyaryletherketone powder is processed such that it is particularly suited for the use in a method for a layer-wise manufacturing of a three-dimensional object. To this effect the powder is tempered at a temperature that is at least 20° C. above the glass transition temperature for at least 30 minutes before it is used as building material.

Functionalized porous poly(aryl ether ketone) articles are prepared by reacting ketone groups in the backbone of poly(aryl ether ketone) polymer with a primary amine reagent. Preferred functional primary amines are primary aliphatic amines or substituted hydrazines containing one or more target functional groups including polar groups, such as hydroxyl groups, ˜OH, amino groups, ˜NH₂, ˜NHR, ˜NRR′, and ethylene oxide groups, ˜OCH₂CH₂—, negatively or positively charged ionic groups, such as ˜SO₃⁻, ˜COO⁻, and ˜NH₄⁺ groups, hydrophobic groups such as siloxane or perfluorcarbone groups, and non-polar groups, such as linear or branched hydrocarbon groups. The functionalized porous poly(aryl ether ketone) article can be prepared by reacting primary amine with a pre-formed, shaped porous poly(aryl ether ketone) article or by functionalizing the surface of a non-porous precursor article that is subsequently converted into a porous article.

The invention relates to a multiple-layer complex proton exchange film for the fuel battery in particular to a multiple-layer self-humidifying complex film and preparing method for the proton exchange film fuel battery. The complex film comprises the following parts: a porous strengthening film and a self-humidifying complex layer, wherein the proton exchange film resin is poured and painted on the porous strengthening film and the strengthening complex film is formed, the self-humidifying complex layer is poured and painted at two sides of the strengthening complex film, the self-humidifying complex layer is comprised by the metal accelerant and the proton exchange film resin(the mass ratio of the accelerant(pt) and the proton exchange film resin is 0.0005:1-0.01:1), the proton exchange film resin can be perfluorine sulfonic acid resin, sulfonated polyarylethersulfone, sulfonated polyetheretherketone, partial sulfonated polystyrene fluoride, partial sulfonated polyarylethersulfone fluoride, or partial polyaryletheretherketone fluoride. The multiple-layer self-humidifying complex film is provided with the good steady, the high proton conductivity and the good self-humidifying property.

A fabrication and adhesion method for a polyaryl-ether-ketone (PAEK) device, such as a microfluidic device, is disclosed. At least one glassy uncrystallized PAEK substrate is heated up to near or above the glass transition temperature to allow the substrate to crystallize from the glass state, while embossing the substrate with patterns. Bonding the PAEK substrate to another substrate is accomplished using a solvent-resistant adhesive, such as a polyimide-based adhesive, in combination with an adhesion enhancement treatment. In certain embodiments, the adhesion enhancement treatment is a plasma treatment or a chemical sulfonation treatment.

A fiducial marker which is visible to a wide range of imaging techniques, comprises a radiopaque material, such as barium sulphate or a metal wire, encapsulated in a biocompatible polymeric material, for example a polyaryletherketone such as polyetheretherketone.

The invention discloses a cellulose porous membrane able to be used for a lithium ion secondary cell diaphragm. Two side surfaces of the membrane are coated with sodium alginate, a fluorine-containing polymer, polyaryletherketone, polyimide, polynorbornene or inorganic nanoparticles and other structure enhanced and interface stable components. The membrane has thickness of 15-100 micrometers, and air permeability of 2-500s. The upper and lower surfaces as well as inner pores of the membrane are symmetrically and uniformly distributed, with an average pore size of 20-200 nanometers and tensile strength of 50-250MPa. The invention also discloses a preparation method of the cellulose porous membrane. The membrane of the invention can be used as a lithium ion cell diaphragm and has good heat resistance, and even if at a temperature of 150DEG C, a cell short circuit phenomenon cannot occur. Therefore, the cell diaphragm provided in the invention is especially suitable for large capacity and power lithium ion cells. In addition, employment of biomass cellulose that has the largest output in the nature as the raw material for producing the lithium ion cell diaphragm has the advantages of low cost, sustainability and environmental protection.

Sulfonated block copolymers that may be used as membranes for fuel cells include sulfonated polyaryletherketone blocks and lightly sulfonated polyethersulfone blocks.

The sulfonated polyaryletherketone blocks include structural units of formula

and the lightly sulfonated polyethersulfone blocks include structural units of formula

wherein

• • R¹, R², R³, R⁴, R⁵ and R⁶ are independently C₁-C₁₀ alkyl, C₃-C₁₂ cycloalkyl, C₆-C₁₄ aryl, allyl, alkenyl, alkoxy, halo, or cyano;
  • Z, Z¹ and Z² are independently a direct bond or O, S, (CH₂)_r, (CF₂)_r, C(CH₃)₂, C(CF₃)₂, or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof; a and e are independently 0 or an integer from 1 to 3; b, c, d, and f are independently 0 or an integer from 1 to 4; m, n and p are independently 0 or 1; and r is an integer from 1 to 5.

The present invention discloses a polyaryletherketone composite material and a preparation method thereof. The polyaryletherketone composite material comprises the following components, by weight, 40-99.8 parts of a polyaryletherketone resin, 0.1-20 parts of a polytetrafluoroethylene resin, 0-20 parts of fibers, 0.1-30 parts of a solid lubricant, and 0-15 parts of a filler, wherein various components are completely mixed and grinded into fine powder, and the fine powder is subjected to molding forming to prepare the material. According to the present invention, polyaryletherketone modification is performed so as to prepare the polyaryletherketone composite material with characteristics of high wear resistance and good lubricity; test results show that an average friction coefficient of the composite material is not higher than 0.15, and an average wear rate is less than 10<-8> mm<3>/Nm; and the polyaryletherketone composite material is made into a bridge bearing used in the bridge field, and a high elasticity polyurethane is matchedly adopted as a pressure bearing plate and sealing ring buffer material so as to substantially improve mechanical properties of the bridge bearing and improve a service life of the bridge bearing.

The present description discloses a polymeric composition which is a melt-processed alloy comprised of (a) a polyarylene sulfide resin, (b) a polyaryl-ether-ketone resin, and a reactive compound which results in (c) a graft copolymer of the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin in addition to the starting resins. Exemplary melt-processed polymeric compositions can be made by reacting an alkoxy silane with the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin to produce a graft copolymer of a portion of one or both of the resins, sufficient to render the composition uniform and homogeneous. It is normally preferred for the exemplary organosilane compound, to be an amino silane. The subject invention further reveals an insulated wire comprising (1) an electrical conductor and (2) a layer of the melt-processed alloy composition; and fiber reinforced composites comprising fibers substantially fully impregnated with the alloy polymeric composition.

The invention relates to cranioplasty prosthesis with biological activity and a preparation method of the cranioplasty prosthesis. The cranioplasty prosthesis with biological activity sequentially comprises an unmodified cranioplasty prosthesis layer, a modified cranioplasty prosthesis layer and a nanofiber membrane layer from inside to outside. The invention further provides a preparation method of the cranioplasty prosthesis. By virtue of a three-layer structure and polyaryletherketone materials which are equivalent to a bone of a human body in hardness, strength and weight, are good in biocompatibility, and a 3D printing technology, a cranioplasty prosthesis implant has reliably safety and effectivity and high matching degree. The cranioplasty prosthesis provided by the invention is capable of loading a plurality of bionic scaffolds and bioactive substances, and promoting exchange of nutrient substances inside and outside the prosthesis, and is beneficial to growth of tissues.

The present invention relates to an improved method of grinding polyaryletherketones, providing very good yields and the production of powders of polyaryletherketones with an average diameter below 100 μm having a narrow size distribution with few fine particles (Dv10>15 μm).

A membrane for an acoustic transducer may comprise a first layer comprising a first material, a second layer disposed on the first layer, the second layer comprising a second material that is different from the first material, and a third layer disposed on the second layer, the third layer comprising a third material that is different from the first material and the second material, the third layer configured to be coupled with a moveable coil. The first material may be a polyaryletherketone (PAEK), the second material may be acrylate, and the third material may be polyetherimide (PEI), polycarbonate (PC), or another similar material.