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WO2001090230A1 - Polymeres autolubrifiants - Google Patents

Polymeres autolubrifiants Download PDF

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Publication number
WO2001090230A1
WO2001090230A1 PCT/DK2001/000364 DK0100364W WO0190230A1 WO 2001090230 A1 WO2001090230 A1 WO 2001090230A1 DK 0100364 W DK0100364 W DK 0100364W WO 0190230 A1 WO0190230 A1 WO 0190230A1
Authority
WO
WIPO (PCT)
Prior art keywords
polymer
lubricating
self
oils
density polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DK2001/000364
Other languages
English (en)
Inventor
Chaabane Armand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NKT Research Center AS
Original Assignee
NKT Research Center AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NKT Research Center AS filed Critical NKT Research Center AS
Priority to AU60090/01A priority Critical patent/AU6009001A/en
Publication of WO2001090230A1 publication Critical patent/WO2001090230A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59

Definitions

  • the present invention relates to self-lubricating polymers, to methods for producing such polymers and to shaped articles produced from the polymers.
  • US 5,180,761 discloses a self-lubricating composite material used for the fabrication of bearing members.
  • the composite material comprises 100 parts by weight of polymeric materials, 1-15 parts by weight of liquid lubricants, of which 0.1-15 parts by weight are polar compounds, and 4-100 parts by weight of filler or solid lubricants that have been treated with 0.2-3 parts by weight of titanates or silane compounds per 100 parts by weight of fillers or solid lubricants.
  • US 4,357,249 discloses structural members, in particular journal-type bearings, produced by molding under pressure at elevated temperatures a blend of 70-95% by weight of a linear ultra high molecular weight ethylene polymer and 5-30% by weight of a normally solid lubricant selected from waxes, fats and mixtures thereof alone or with a grease.
  • the bearings are said to have a surface which is not oily to the touch. Lubricant is slowly released at temperatures developed in ordinary use.
  • self-lubricating polymer products in the form of e.g. a film, foil or tape could be applied to the surface of a variety of different products in order to provide them with self-lubricating properties.
  • contemplated uses include skis as well as lubrication of surfaces to reduce friction upon contact with water, e.g. on boats, ships, surfboards and wind-surfboards.
  • the present invention relates to a method by which the friction properties of a polymer can be adjusted so as to result in a desired decreased or increased friction coefficient.
  • the invention thus provides, in one embodiment, self-lubricating polymers, suitable for a wide variety of applications, produced by including a modifying agent (lubricating agent) in the molten mass of the polymer.
  • a modifying agent lubricating agent
  • the invention makes it possible to either decrease or increase the friction coefficient of a polymer, depending on the nature of the particular combination of modifying agent and polymer.
  • the invention relates to a self-lubricating polymeric material comprising at least one crystalline or semi-crystalline synthetic polymer having incorporated therein at least one lubricating agent, wherein the lubricating agent migrates towards exposed surfaces of the polymer to result in self-lubrication of said surfaces.
  • Another aspect of the invention relates to a method for producing a self-lubricating polymeric material, comprising providing a molten mixture comprising at least one crystalline or semi-crystalline synthetic polymer and at least one lubricating agent, forming the molten mixture into a material having a desired shape, and allowing the material to cool.
  • the invention relates to shaped articles comprising a self-lubricating polymeric material as described herein.
  • the invention relates to a method for producing a polymeric material with an increased friction coefficient, comprising providing a molten mixture comprising at least one synthetic polymer selected from amorphous polymers and polymers having a crystallinity of at the most about 20%, and at least one modifying agent serving to increase friction of the polymer, forming the molten mixture into a material having a desired shape, and allowing the material to cool.
  • Crystalline polymer for instance goes through different stages during the melting process, a softening stage which results in a change of free volume, a melt stage where the crystals start to disorganise, and finally an isotropic stage where the polymer becomes fully liquid.
  • the polymer tends to regain its organised state in the opposite order, i.e. from isotropic to crystallisation and finally solidification.
  • the present invention is based on the use of at least one crystalline or semi-crystalline polymer.
  • crystalline polymer refers to a polymer with a crystallinity of at least 90%
  • si-crystalline polymer refers to a polymer with a crystallinity of less than 90% but generally more than about 20%. Crystallinity may be determined by known methods such as differential scanning calorimetry (DSC) .
  • DSC differential scanning calorimetry
  • This group of polymers includes, but is not limited to, polyolefins, including polyolefin homopolymers and copolymers, e.g.
  • HDPE high density polyethylene
  • MDPE medium density polyethylene
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • suitable polymers are copolymers of ethylene/vinylacetate, propylene/vinylacetate, ethylene/acrylate and propylene/acrylate.
  • the percentage of the vinyl or acrylate monomer in such polymers will typically vary from about 5% to about 50% by weight, more typically from about 10% to about 30% by weight of the weight of the ethylene or propylene component.
  • Other olefin-based copolymers typically block copolymers, such as EPDM (ethylene-propylene-diene-monomer) may also be used, as can e.g. styrene/butadiene and styrene/acrylonitrile block copolymers.
  • Lubricating agents suitable for use in the present invention will typically be oligomers or polymers having a room temperature glass transition (RT Tg).
  • room temperature glass transition temperature refers to polymers that are liquid at room temperature, i.e. at 20°C.
  • Non-limiting examples of such lubricating agents include paraffinic, naphtenic and aromatic oils, silicone oils, fluorine oils, silico-hydrocarbon oils, fluoro-hydrocarbon oils, silico-fluorine oils, and silico-fluoro-hydrocarbon oils.
  • lubricating agents are polyethylene glycol, polypropylene glycol, fatty acids and esters thereof with polyethylene glycol or polypropylene glycol, fatty alcohols and ethers thereof with polyethylene glycol or polypropylene glycol, as well as glycerol and modified fatty acids, modified fatty acid esters and derivatives thereof.
  • fatty acids that may be used include soybean oil, castor oil and epoxidised or esterified derivatives thereof.
  • the amount of lubricant to be incorporated into any given host polymer can vary within wide limits depending on factors such as the nature the polymer, the nature of the lubricant and the specific properties desired in the finished product to be produced from the polymer. Generally, the amount of lubricant will be in the range of from about 5% to about 50% by weight based on the weight of the polymer. Typically, the amount of lubricant will be at least about 10%, e.g. at least about 15%, and up to about 30%, e.g. up to about 25%.
  • lubricant can vary considerably, persons skilled in the art will be able to select an appropriate amount of lubricant in any given case based on knowledge of the polymer and lubricant as well as the desired properties of the product, supplemented by routine tests to verify the performance of any given combination.
  • the friction coefficient of a polymer instead of decreasing the friction coefficient of a polymer, it can be increased.
  • a fully amorphous polymer or a polymer with a very low crystallinity typically a crystallinity that does not exceed about 20%, more typically not more than about 15%, e.g. not more than about 10%.
  • the degree of crystallinity may be determined using methods such as DSC.
  • the increased friction coefficient is obtained by incorporating one of the lubricating agents discussed above into the polymer, taking into account the polarity of the lubricating agent and the host polymer.
  • the lubricating agent is solubilised in the low crystallinity host polymer, yielding a polymer surface with a higher friction coefficient than that of the pure polymer without the lubricant.
  • Non-limiting examples of suitable amorphous polymers or low crystallinity polymers include polyvinyl acetate (PVA), polyvinychloride (PVC), polyacrylate, polyacrylic acid and polyurethane.
  • PVA polyvinyl acetate
  • PVC polyvinychloride
  • a number of low crystallinity copolymers can also be used in this regard, since copolymers general have a relatively low crystallinty. Examples include ethylene- alpha olefin copolymer, propylene-alpha-olefin copolymer, styrene-butadiene block copolymer, styrene-acrylonitrile copolymer, etc.
  • any mixing device equipped with a heating system and a feeding and discharging system can be used.
  • Such equipment is well known and the art and can be used in the context of the present invention in a manner known perse. Examples include dough mixers, batch mixers such as a Bumbury mixer, Brabender type or Haake type, single screw extruder, twin screw extruder, Buss co- kneader, etc.
  • any of above-mentioned devices equipped with a suitable die can be used.
  • Such devices for the production of shaped articles e.g. using methods such as extrusion or injection moulding, are also well known in the art and can be used in a manner known perse. Mixing and shaping will typically take place in a single run.
  • the end product can be anything that conventionally is able to be produced from the polymer(s) of the given mix by any suitable method such as extrusion, injection molding, etc.
  • the product can, for example, be extruded in the form of a pipe or tube, a foil, film or sheet, a tape, a rod, a filament, a fibre, etc.
  • injection molding techniques products having a immense variety of different shapes can be produced by methods known in the art.
  • a typical mixture recipe for producing self-lubricating polymers according to the present invention will often, in addition to the host polymer and the lubricant, comprise one or more additional components known per se in the art such as stabilising agents, anti-UV agents, antioxidants, plasticising agents, colorants and dyeing agents, antistatic agents, etc.
  • the mixture will normally include at least one antioxidant and at least one anti-UV agent.
  • the self-lubricating products of the invention can find use in any application where a low friction coefficient is needed and, in the case of products with an increased friction coefficient, also in applications where a high friction coefficient is needed or where a need otherwise exists to be able to "fine-tune" the friction properties of a polymer.
  • products prepared according to the invention can be used to manufacture self- lubricated catheters or any device that is designed to be inserted in a human or animal body, such as operation pipes that are to be inserted in human body through the nose or the mouth. It is also contemplated that the present invention will be applicable to the production of self-lubricating condoms.
  • tube-in-tube or pipe-in-pipe insertion this insertion can be eased if at least one of the tubes or pipes are suitably internally or externally lubricated according to the invention.
  • a similar use is in reducing friction in pistons in general, including in syringes, thus allowing easier administration of injected medicaments.
  • Commodity cable construction requires lubrication between the elements constituting the cable to ease internal cable motion. Extruding a self-lubricated, insulated wire would be ideal when assembling insulated wires together. The same is valid for multilayer constructions where the layers are subjected to movement relative to each other.
  • An example of such multilayer constructions is a super-conducting cable comprising multilayer tapes.
  • ethylene vinylactate copolymer having 10% vinylacetate and appropriate additives such as an antioxidant and a UV stabiliser are slowly fed into a single screw extruder equipped with a pressure die.
  • 20 parts of soybean oil having a molecular weight of 2000 is added.
  • the mixture is extruded through the pressure die, after which the extruded pipe is rolled onto a take-up roll and stored in a dust-free package until use.
  • Example 6 100 parts of ethylene vinylactate copolymer having 10% vinylacetate and appropriate additives such as an antioxidant and a UV stabiliser are slowly fed in a single screw extruder equipped with a pressure die. In the metering zone of the extruder 20 parts of epoxidised soybean oil having a molecular weight of 2000 is added. The mixture is extruded through the pressure die, after which the extruded pipe is rolled onto a take-up roll and stored in a dust-free package until use.
  • appropriate additives such as an antioxidant and a UV stabiliser

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une matière polymère autolubrifiante qui comprend au moins un polymère synthétique cristallin ou semi-cristallin contenant au moins un agent lubrifiant incorporé, cet agent lubrifiant migrant en direction de surfaces exposées du polymère pour assurer une autolubrification de ces surfaces ; un procédé de production de ces matières polymères autolubrifiantes ; et des articles façonnés contenant ces matières polymères autolubrifiantes, p. ex. sous forme de tuyau ou de tube, de feuille, de film, de ruban, de tige, de filament ou de fibre. L'article façonné peut être p. ex. un produit médical tel qu'un cathéter ou une partie de cathéter, un produit industriel tel qu'une structure de câble ou une partie de celle-ci, ou une surface conçue pour être en contact avec de l'eau.
PCT/DK2001/000364 2000-05-26 2001-05-25 Polymeres autolubrifiants Ceased WO2001090230A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60090/01A AU6009001A (en) 2000-05-26 2001-05-25 Self-lubricating polymers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200000838 2000-05-26
DKPA200000838 2000-05-26

Publications (1)

Publication Number Publication Date
WO2001090230A1 true WO2001090230A1 (fr) 2001-11-29

Family

ID=8159520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2001/000364 Ceased WO2001090230A1 (fr) 2000-05-26 2001-05-25 Polymeres autolubrifiants

Country Status (2)

Country Link
AU (1) AU6009001A (fr)
WO (1) WO2001090230A1 (fr)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007042526A3 (fr) * 2005-10-11 2007-09-07 Invendo Medical Gmbh Dispositif medical dote d'un element autolubrifiant
US7749024B2 (en) 2004-09-28 2010-07-06 Southwire Company Method of manufacturing THHN electrical cable, and resulting product, with reduced required installation pulling force
US7857285B2 (en) 2005-07-13 2010-12-28 Baxter International Inc. Lubricious or/and wettable or/and anti-thrombin elastomeric gland materials in luer activated devices
US8034865B2 (en) 2008-05-01 2011-10-11 Roller Bearing Company Of America, Inc. Self-lubricating surface coating composition
US8168715B2 (en) * 2004-12-23 2012-05-01 Florian Felix Sliding coating for winter sports equipment
WO2012162147A1 (fr) * 2011-05-20 2012-11-29 The Procter & Gamble Company Articles moulés formés à partir de compositions constituées de polymères et d'huiles
WO2012162134A1 (fr) * 2011-05-20 2012-11-29 The Procter & Gamble Company Films formés à partir de compositions polymères/huiles
WO2012162146A1 (fr) * 2011-05-20 2012-11-29 The Procter & Gamble Company Compositions constituées de polymères et d'huiles, et procédés de fabrication et d'utilisation desdites compositions
US20120321869A1 (en) * 2011-05-20 2012-12-20 William Maxwell Allen Films of polymer-wax compositions
US20120328804A1 (en) * 2011-05-20 2012-12-27 William Maxwell Allen Molded articles of polymer-oil compositions
US20130004691A1 (en) * 2011-05-20 2013-01-03 William Maxwell Allen Molded articles of polymer-wax compositions
US20130012093A1 (en) * 2011-05-20 2013-01-10 Eric Bryan Bond Fibers of polymer-wax compositions
US20130053479A1 (en) * 2011-05-20 2013-02-28 Eric Bryan Bond Fibers of polymer-oil compositions
US20130089747A1 (en) * 2011-05-20 2013-04-11 William Maxwell Allen, Jr. Fibers of Polymer-Wax Compositions
CN103547623A (zh) * 2011-05-20 2014-01-29 宝洁公司 聚合物-蜡组合物、其制备和使用方法
CN103547624A (zh) * 2011-05-20 2014-01-29 宝洁公司 聚合物-蜡组合物的模塑制品
US8728370B2 (en) 2005-05-13 2014-05-20 Basell Polyolefin Gmbh Polyolefinic molding composition having improved resistance to thermooxidative degradation and its use for the production of pipes
US8735481B2 (en) 2008-05-01 2014-05-27 Roller Bearing Company Of America, Inc. Self-lubricating surface coating composition for low friction or soft substrate applications
US20140272359A1 (en) * 2013-03-15 2014-09-18 The Procter & Gamble Company Nonwoven substrates
US8986586B2 (en) 2009-03-18 2015-03-24 Southwire Company, Llc Electrical cable having crosslinked insulation with internal pulling lubricant
US9200234B1 (en) 2009-10-21 2015-12-01 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US9205006B2 (en) 2013-03-15 2015-12-08 The Procter & Gamble Company Absorbent articles with nonwoven substrates having fibrils
US9352371B1 (en) 2012-02-13 2016-05-31 Encore Wire Corporation Method of manufacture of electrical wire and cable having a reduced coefficient of friction and required pulling force
US9431152B2 (en) 2004-09-28 2016-08-30 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US9504610B2 (en) 2013-03-15 2016-11-29 The Procter & Gamble Company Methods for forming absorbent articles with nonwoven substrates
CN106883910A (zh) * 2017-01-18 2017-06-23 广州雷哲科技有限公司 一种自润滑抗磨修复剂
US9864381B2 (en) 2007-02-15 2018-01-09 Southwire Company, Llc Integrated systems facilitating wire and cable installations
US10056742B1 (en) 2013-03-15 2018-08-21 Encore Wire Corporation System, method and apparatus for spray-on application of a wire pulling lubricant
US10271999B2 (en) 2014-11-06 2019-04-30 The Procter & Gamble Company Crimped fiber spunbond nonwoven webs/laminate
US10325696B2 (en) 2010-06-02 2019-06-18 Southwire Company, Llc Flexible cable with structurally enhanced conductors
US10431350B1 (en) 2015-02-12 2019-10-01 Southwire Company, Llc Non-circular electrical cable having a reduced pulling force
US11090407B2 (en) 2017-03-09 2021-08-17 The Procter & Gamble Company Thermoplastic polymeric materials with heat activatable compositions
US11110013B2 (en) 2014-09-10 2021-09-07 The Procter & Gamble Company Nonwoven webs with hydrophobic and hydrophilic layers
US11129919B2 (en) 2016-03-09 2021-09-28 The Procter & Gamble Company Absorbent article with activatable material
US11328843B1 (en) 2012-09-10 2022-05-10 Encore Wire Corporation Method of manufacture of electrical wire and cable having a reduced coefficient of friction and required pulling force
EP3720516B1 (fr) 2017-12-05 2023-06-07 Hollister Incorporated Cathéters urinaires comprenant des propriétés mécaniques stables sur une plage de températures

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EP0011325A1 (fr) * 1978-10-26 1980-05-28 Akzo N.V. Composition à base de résine présentant des propriétés de lubrification interne et externe améliorées
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EP0369255A2 (fr) * 1988-11-14 1990-05-23 General Electric Company Compositions de caoutchouc de silicone autolubrifiantes et durcissables à la chaleur
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EP0011325A1 (fr) * 1978-10-26 1980-05-28 Akzo N.V. Composition à base de résine présentant des propriétés de lubrification interne et externe améliorées
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EP0369255A2 (fr) * 1988-11-14 1990-05-23 General Electric Company Compositions de caoutchouc de silicone autolubrifiantes et durcissables à la chaleur
EP0448259A2 (fr) * 1990-03-09 1991-09-25 Union Carbide Chemicals And Plastics Company, Inc. Procédé pour l'extrusion de polyéthylène à basse densité
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WO1996026978A1 (fr) * 1995-02-28 1996-09-06 Hoechst Celanese Corporation Ameliorations apportees a une composition polymere thermoplastique auto-lubrifiante
JPH09165478A (ja) * 1995-12-15 1997-06-24 Ube Ind Ltd 自動車部品用ポリプロピレン樹脂組成物

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US11842827B2 (en) 2004-09-28 2023-12-12 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US11011285B2 (en) 2004-09-28 2021-05-18 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US9142336B2 (en) 2004-09-28 2015-09-22 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US12300403B2 (en) 2004-09-28 2025-05-13 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US11942236B2 (en) 2004-09-28 2024-03-26 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US10763010B2 (en) 2004-09-28 2020-09-01 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US10763009B2 (en) 2004-09-28 2020-09-01 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US10763008B2 (en) 2004-09-28 2020-09-01 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US10706988B2 (en) 2004-09-28 2020-07-07 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US11527339B2 (en) 2004-09-28 2022-12-13 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US7749024B2 (en) 2004-09-28 2010-07-06 Southwire Company Method of manufacturing THHN electrical cable, and resulting product, with reduced required installation pulling force
US9431152B2 (en) 2004-09-28 2016-08-30 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US11355264B2 (en) 2004-09-28 2022-06-07 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US11776715B2 (en) 2004-09-28 2023-10-03 Southwire Company, Llc Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US8168715B2 (en) * 2004-12-23 2012-05-01 Florian Felix Sliding coating for winter sports equipment
US8728370B2 (en) 2005-05-13 2014-05-20 Basell Polyolefin Gmbh Polyolefinic molding composition having improved resistance to thermooxidative degradation and its use for the production of pipes
US7857285B2 (en) 2005-07-13 2010-12-28 Baxter International Inc. Lubricious or/and wettable or/and anti-thrombin elastomeric gland materials in luer activated devices
WO2007042526A3 (fr) * 2005-10-11 2007-09-07 Invendo Medical Gmbh Dispositif medical dote d'un element autolubrifiant
US9864381B2 (en) 2007-02-15 2018-01-09 Southwire Company, Llc Integrated systems facilitating wire and cable installations
US8034865B2 (en) 2008-05-01 2011-10-11 Roller Bearing Company Of America, Inc. Self-lubricating surface coating composition
US8741996B2 (en) 2008-05-01 2014-06-03 Roller Bearing Company Of America, Inc. Self-lubricating surface coating composition
US8735481B2 (en) 2008-05-01 2014-05-27 Roller Bearing Company Of America, Inc. Self-lubricating surface coating composition for low friction or soft substrate applications
US10023740B2 (en) 2009-03-18 2018-07-17 Southwire Company, Llc Electrical cable having crosslinked insulation with internal pulling lubricant
US8986586B2 (en) 2009-03-18 2015-03-24 Southwire Company, Llc Electrical cable having crosslinked insulation with internal pulling lubricant
US11046851B2 (en) 2009-03-18 2021-06-29 Southwire Company, Llc Electrical cable having crosslinked insulation with internal pulling lubricant
US10580551B1 (en) 2009-10-21 2020-03-03 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US12300404B1 (en) 2009-10-21 2025-05-13 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US11101053B1 (en) 2009-10-21 2021-08-24 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US9200234B1 (en) 2009-10-21 2015-12-01 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US11783963B1 (en) 2009-10-21 2023-10-10 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US10276279B1 (en) 2009-10-21 2019-04-30 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US10062475B1 (en) 2009-10-21 2018-08-28 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US11456088B1 (en) 2009-10-21 2022-09-27 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US9458404B1 (en) 2009-10-21 2016-10-04 Encore Wire Corporation System, composition and method of application of same for reducing the coefficient of friction and required pulling force during installation of wire or cable
US11145433B2 (en) 2010-06-02 2021-10-12 Southwire Company, Llc Flexible cable with structurally enhanced conductors
US10325696B2 (en) 2010-06-02 2019-06-18 Southwire Company, Llc Flexible cable with structurally enhanced conductors
US20130012093A1 (en) * 2011-05-20 2013-01-10 Eric Bryan Bond Fibers of polymer-wax compositions
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