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7479243 |
Microporous polyolefin membrane, and method of producing the same
The present invention provides a microporous polyolefin membrane of high permeability and novel structure, and also provides a method of producing the same, wherein its average pore size is...
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6858057 |
Filter media
A filter media comprising a synthetic microfiber polymer fine fiber web wherein the diameter of the fibers is between about 0.8 to about 1.5 microns. The filter media is acceptable for use in...
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6793854 |
Method and apparatus for making plastic film, and plastic film
A method and an apparatus for making a plastic film, and to a plastic film wherein the method includes extruding a film from plastic material by an extruder and orientating the film after...
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RE38583 |
Process for the production of cellulosic moulded bodies
The invention relates to a process for the manufacture of cellulosic flat films and cellulosic membranes in the form of flat membranes whereby a solution of cellulose in an aqueous tertiary amine...
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6660211 |
Methods of making biodegradable films having enhanced ductility and breathability
The present invention is directed to methods of making biodegradable films and biodegradable precursor films having enhanced breathability and ductility. The method includes blending a water...
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6569987 |
Process for producing meta-aromatic polyamide fiber
To produce meta aramid filaments having a good quality from a polymer solution of a meta aramid produced by a solution polymerization method, with high efficiency, (1) a meta aramid is prepared by...
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6566012 |
Polyolefin microporous film and method for preparing the same
It is an object of the present invention to provide a microporous polyolefin membrane, high in pin puncture strength, adequate in pore diameter and high in porosity, comprising (A) an...
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6558591 |
Process of making microporous film
A microporous film of polyethylene having an intrinsic viscosity above 5 dl/g is prepared from a homogeneous solution in an evaporable solvent. The film is cooled and evaporable solvent is...
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6540953 |
Microporous membrane and method for providing the same
A method of producing a microporous membrane comprising the steps of: extruding a polymer at a temperature of from (polymer melting point +10° C.) to (polymer melting point +100° C.); drawing the...
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6524360 |
Melt blown composite HEPA filter media and vacuum bag
An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration...
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6177035 |
Method for producing cellulose shaped bodies
The invention relates to a process for the manufacture of cellulosic flat films and of cellulosic membranes in the form of flat membranes whereby a solution of cellulose in an aqueous tertiary...
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6153133 |
Method of producing highly permeable microporous polyolefin membrane
A method for producing a highly permeable microporous polyolefin membrane including the steps of preparing a polyolefin solution containing 5-40 weight % of a polyolefin or a polyolefin composition...
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6127438 |
Polyethylene microporous film and process for producing the same
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6110251 |
Gas filtration media and method of making the same
An improved gas filtration media with a lower initial pressure drop and increased dirt holding capacity includes a fibrous mat of randomly oriented meltblown polymeric fibers made from a polymer...
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5968994 |
High strength porous film of polypropylene and process for producing same
A process for producing a porous film of polypropylene comprises subjecting (1) an air-impermeable biaxially stretched film of polypropylene resin comprised predominantly of polypropylene having a...
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5888434 |
Process for making a microporous membrane from a blend containing a poly (phenylene sulfide) polymer, an amorphous polymer, and optionally a solvent
The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(phenylene sulfide) polymer by forming a mixture of an unsulfonated poly(phenylene sulfide) polymer,...
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5762840 |
Process for making microporous fibers with improved properties
A distinctive technique for making porous fiber includes a stretching of a substantially continuous fiber while the fiber is in an operative association with an effective quantity of surface-active...
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5759678 |
High-strength porous film and process for producing the same
The present invention relates to a high-strength porous film or sheet consisting essentially of a high-molecular-weight polyethylene resin having a viscosity-average molecular weight of not less...
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5683634 |
Process of making porous films or sheets
A porous film or sheet including a resin composition mainly of an ultra-high molecular weight polyethylene having a viscosity-average molecular weight of not less than 500,000, and having a...
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5667743 |
Wet spinning process for aramid polymer containing salts
A process for wet spinning a meta-aramid polymer solutions having a salt content of at least 3 percent by weight produces a one step, fully wet drawable fiber that has desirable physical properties...
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5658644 |
Light weight board of improved mechanical strength and manufacture thereof
An extruded hollow plastic board is described which has a pair of flat and parallel sheets spaced apart and interconnected by longitudinally extending ribs. The ribs and sheets are connected with...
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5582786 |
Method of producing fibre or film
A water-absorbent water-insoluble fibre or film is produced by extruding an aqueous solution of a water-soluble polymer into a gaseous medium to form fibre or film. The extruded fibre or film is...
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5514308 |
Method for hydrosonically embedding a material in a soft thin film material
A thin soft film material having fibers and/or particulates embedded therein is disclosed. A process for effecting such embedding utilizing hydrosonics is also disclosed.
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5468543 |
Process for producing a ski coating strip made of ultra high molecular-weight polyethylene
The invention concerns a process for manufacturing a strip of ski-coating material made of polyethylene of ultra high molecular weight, wherein a ski-coating strip material 4 manufactured to a...
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5275766 |
Method for making semi-permeable polymer membranes
A method for making a semi-permeable microporous polymer sheet, useful as a separation membrane or the like, including extruding a melt-blended mixture of a high-temperature thermoplastic polymer...
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5266254 |
Process for the high-speed spinning of monofilaments
A process of high-speed spinning of a set of thermoplastic monofilaments having a linear density from 1 to 30 dtex, includes spinning to obtain melt-spun thermoplastic monofilaments and airblast...
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5227101 |
Process of making microporous membranes from poly(etheretherketone)-type polymers and low melting point crystallizable polymers
The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(etheretherketone)-type polymer by forming a mixture of an unsulfonated poly(etheretherketone)-type...
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5219501 |
Process for the production of acrylic short fibers without spinning
A process for the production of pulp-like short fibers having a highly-oriented fibril structure without spinning is provided. This process comprises heating a mixture of water and an acrylonitrile...
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5205968 |
Process for making a microporous membrane from a blend containing a poly(etheretherketone)-type polymer, an amorphous polymer, and a solvent
The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(etheretherketone)-type polymer by forming a mixture of an unsulfonated poly(etheretherketone)-type...
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5171504 |
Process for producing high strength, high modulus thermoplastic fibers
The invention provides improved thermoplastic high strength, highly oriented fibers and a process for producing the fibers by melt spinning a thermoplastic polymer to form a threadline, preferably...
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5160464 |
Polymer irradiation
A process for the preparation of an oriented homo- or co-polyalkene material of improved strain rate sensitivity, which process comprises subjecting the oriented homo- or co-polyalkene material...
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5087401 |
Process for preparing polyester filamentary material
A process for preparing polyester continuous filamentary material by (a) extruding the polyester material while molten to form filaments, (b) solidifying the molten filaments by cooling them to a...
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5066755 |
Novel irradiated polyethylene filaments tapes and films and process therefor
Novel gel-spun, irradiated and drawn ultra high strength high molecular weight and at least partially cross-linked and/or branched polyethylene filaments, tapes and films, exhibiting a combination...
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5064580 |
Process for making microporous membranes from poly(etheretherketone)-type polymers
A method of preparing a microporous membrane from unsulfonated poly(etheretherketone)-type polymers.
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5057261 |
Process for producing modified ultrahigh-molecular-weight polyolefins
A process for producing a modified ultrahigh-molecular-weight polyolefin composition, which comprises mixing a powder of an ultrahigh-molecular-weight polyolefin (A) having an intrinsic viscosity...
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5055248 |
Process for producing stretched article of ultrahigh-molecular weight polyethylene
Stretched articles of ultrahigh-molecular-weight polyethylene are prepared by melt-kneading a mixture of ultrahigh-molecular-weight polyethylene with an aliphatic compound (b 1 ) of at least 8...
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5045258 |
Process for the preparation of thermoplastic fibers
A process for the preparation of thermoplastic fibers which comprises: (a) spinning a solution of an alternating copolymer of an olefinically unsaturated compound and carbon monoxide, having a...
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5032338 |
Method to prepare high strength ultrahigh molecular weight polyolefin articles by dissolving particles and shaping the solution
A method to prepare high strength high modulus polyolefin shaped articles comprising forming a heated solution of the polyolefin from particles of which about 75 to 100% by weight have a particle...
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4997714 |
Absorbent products and their manufacture
Film or fibre is made from a polymer of water soluble ethylenically unsaturated monomeric material that includes ionic monomer by extrusion and stretching, and a counterionic lubricant compound is...
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4994335 |
Microporous film, battery separator employing the same, and method of producing them
This microporous film has an approximately uniform configuration in which the intervals between slender fibrils extend approximately two-dimensionally which are connected to each other between...
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4971744 |
Two-stage process for preparing aromatic polyamide film
A process for preparing aromatic polyamide film wherein an aromatic diamine and an aromatic diacidchloride are dissolved in an amide polymerization solvent containing an inorganic salt, a partial...
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4963299 |
Surface treatment of polyolefin objects
The invention relates to a process for the treatment of surfaces of highly oriented polyolefin objects, obtained by converting a solution or melt of a linear polyolefin with a weight average...
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4938674 |
Extruder head for making anticorrosive tubular polymeric film
An extruder head for making an anticorrosive tubular polymeric film has a body having an extrusion die, a hollow core mounted in the body and extending through the extrusion die, a molding passage...
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4917836 |
Process for producing high-strength, high-modulus carbon fibers
A process of producing carbon fibers, which comprises oxidizing polyacrylonitrile filaments having a tensile strength at 240° C. of 0.3 g/d or higher and a tensile modulus at 240° C. of 2.0 g/d...
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4902460 |
Process for preparation of molecularly oriented, silane-crosslinked ultra-high-molecular-weight polyethylene molded article
If ultra-high-molecular-weight polyethylene having an intrinsic viscosity (β) of at least 5 dl/g is grafted with a silane compound in the presence of a radical initiator and extrusion-molded and...
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4873034 |
Process for producing microporous ultra-high-molecular-weight polyolefin membrane
A process for producing a relatively thick microporous ultra-high-molecular-weight polyolefin membrane, including the steps of: (1) preparing a solution of an ultra-high-molecular-weight polyolefin...
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4870136 |
Molecular oriented, silane-crosslinked ultra-high-molecular-weight polyethylene molded article and process for preparation thereof
If ultra-high-molecular-weight polyethylene having an intrinsic viscosity (η) of at least 5 dl/g is grafted with a silane compound in the presence of a radical initiator and extrusion-molded and...
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4859389 |
Process for preparing polyamide fibers having improved properties
A polyamide fiber excellent in strength, which comprises at least one of polycapramide, polyhexamethylene adipamide and polytetramethylene adipamide in an amount of not less than 60% by weight on...
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4842797 |
Process for producing shaped polyamide articles
A process for producing a shaped article of polyamide which comprises (1) melt-shaping an intimate mixture of 100 parts by weight of a polyamide having hexamethylene terephthalamide as main...
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4775585 |
Polymer article having an antibacterial property containing zeolite particles therein and the processes for producing same
A polymer article containing zeolite particles on which metal ion having a bactericidal property, e.g. Ag, Cu or Zn, is provided by an ion exchange reaction shows an excellent bactericidal effect...
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