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WO1989000493A1 - Articles a base de polymere oriente - Google Patents

Articles a base de polymere oriente Download PDF

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Publication number
WO1989000493A1
WO1989000493A1 PCT/AU1988/000248 AU8800248W WO8900493A1 WO 1989000493 A1 WO1989000493 A1 WO 1989000493A1 AU 8800248 W AU8800248 W AU 8800248W WO 8900493 A1 WO8900493 A1 WO 8900493A1
Authority
WO
WIPO (PCT)
Prior art keywords
article
length
elongate
rod
polymer
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/AU1988/000248
Other languages
English (en)
Inventor
Jan Havranek
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.)
Broken Hill Proprietary Company Pty Ltd
Original Assignee
Broken Hill Proprietary Company Pty Ltd
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 Broken Hill Proprietary Company Pty Ltd filed Critical Broken Hill Proprietary Company Pty Ltd
Publication of WO1989000493A1 publication Critical patent/WO1989000493A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/14—Twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/30—Drawing through a die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
    • B29C70/14—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat oriented
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/027—Postforming of ropes or strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams

Definitions

  • TITLE ORIENTED POLYMER ARTICLES Field of the Invention : This invention relates to improvements in articles made from oriented polymers.
  • Background of the Invention It is well known to orient polymers such as by the techniques described in the Specifications of British Patent No. 1,480,479, Australian Patent Application No. 40702/85, British Patent Application No. 2,060,469A and Plastics and Rubber Processing and Applications Vol. 6 No. 4, 1986.
  • Such oriented polymers have desirable properties as compared to un-oriented polymers, such as increased Young's modulus and tensile strength.
  • Such oriented polymers might be used in applications in which metals, composites and other materials are presently used, such as, tensile force resisting elements, such as are used in reinforced concrete and in the stabilization of earth and in mines, and rock bolts, because of the tensile properties of the polymer.
  • the resistance to corrosion of polymers is a material advantage since difficulties have been reported with reinforced concrete due to corrosion of steel reinforcement.
  • a difficultly with such or ' iented polymers is that they are difficult to bond either chemically or mechanically with a matrix such as concrete, or with adhesives or grout used with rock bolts. Such difficulty with bonding is presumed to arise out of the chemical nature of the polymer itself which presents an essentially smooth, slipping out surface.
  • Oriented polymers can at least notionally be considered to be comprised of a plurality of fine fibrils or fibres lying essentially parallel to one another. Accordingly, when considering gripping or bonding to an oriented polymer rod, we have rejected cutting a thread in the rod, as hilst this might promote gripping or bonding, it will weaken the rod since fibrils adjacent the surface ould be cut. Further.
  • the present invention therefore provides an elongate article of fibrilar oriented polymer within which the fibrils are substantially parallel to one another throughout the length, substantially without helical twist and at least substantiall continuous along the whole length of the article, said elongate article having a cross-section differing in orientation at various points along at least part of the length of said elongate article but of substantially the same cross-sectional area at those various points to provide at least one abutment surface extending transversely of the length of said elongate article capable of having force applied thereto or therethrough into or through said elongate article.
  • the present invention also provides a method of forming an elongate article of fibrilar oriented polymer within which the fibrils are substantially parallel to one another throughout the length, substantially without helical twist and at least substantially continuous along the whole length of the article, said method comprising deforming a body of such oriented polymer at a temperature below the melting point thereof to produce said at least one abutment surface extending transversely of the length of said elongate article capable of having force applied thereto or therethrough into or through said elongate article.
  • the elongate article may be formed as rod or tube, although the former will normally be preferred.
  • said article was produced b passing said rod through a die ha ing a cylindrical bore therethrough and helical groo es in the bore whereby said article was produced with an abutment surface of helical form.
  • the die was rotated as the rod was passed therethrough.
  • the pitch of the said abutment of helical form may be such as to achieve a surface area of said abutment surface of helical form as is desired.
  • a billet of polymer was passed through a die to orient the polymer and immediately thereafter was passed into a die to form said abutment surface.
  • the elongate article embodying the invention may be put to use in lieu of rockbolts and as a substitute for steel reinforcing rods in concrete. It also has application in stabilizing a matrix including soil. Other applications include those in which longitudinal stress is applied. If desired, the article may be formed with longitudinally extending grooves or flattened areas to assist the article in resisting twisting in use under applied tensile loads.
  • the polymer of which said elongate article is made is not of itself critical but it is believed that polyolefins, particular po 1 yethy 1 enes will be of most value.
  • Fig. 1 is a fragmentary elevation of a rod according to one embodiment of the invention
  • Fig. 2 is a sectional end elevation of the rod of Fig. 1
  • Fig. 3 is a somewhat schematic sectional elevation of a machine for forming the article of Figs. 1 and 2
  • Fig. 4 is a fragmentary longitudinal cross-section of the rod of Fig. 1 in the form of a drawn representation of a scanning electron microscope picture
  • Figs. 1 is a fragmentary elevation of a rod according to one embodiment of the invention
  • Fig. 2 is a sectional end elevation of the rod of Fig. 1
  • Fig. 3 is a somewhat schematic sectional elevation of a machine for forming the article of Figs. 1 and 2
  • Fig. 4 is a fragmentary longitudinal cross-section of the rod of Fig. 1 in the form of a drawn representation of a scanning electron microscope picture
  • the rod 1 sho n in Figs. 1, 2 and 4 is formed of fibrilar oriented polyethylene in a generally circular cross-section having a multiplicity of upstanding helical ribs 2 providing abutment surfaces 3 defined by the rounded sides of the ribs 2. It will be observed that the rod 1 is of constant cross-sectional area throughout its length but that the orientation of the cross-section is different at different points along the length due to the formation of the helical ribs 2. However, as will be evident from Fig.
  • the oriented fibrils forming the rod remain essentially parallel along the length of the rod, notwithstanding the formation of the helical ribs 2.
  • the formation of the helical ribs 2 in the surface of the rod 1 provides generally helically extending abutment surfaces 3 by means of which the resistance of the rod to ithdrawal from a concrete matrix or from an adhesive or grouting material ill be substantially increased without any significant reduction in the tensile strength of the rod provided by the parallel oriented fibrils contained therein.
  • the rod 1 is made by initially drawing a cylindrical billet la of isotropic polyethylene through a die 10 having a central opening 11 of gradually reducing diameter to produce a rod lb of already entered fibrilar form.
  • Billet la is heated to a temperature of about 100°C for the drawing process, and a drawing speed of about 5 to 10 cm/min may be used.
  • the Youngs Modulus of the oriented rod lb is about 25 GPa.
  • the oriented rod lb is then (or subsequently) passed through a further die 21 surrounded by an outer sleeve 24, and having a conical lead-in bore 26, a cylindrical bore portion 27 and a series of shaped helical grooves 28.
  • the die 21 is free to rotate as the rod lb is drawn therethrough, and to this end, the die is mounted on a bearing 29. If desired, the die may be rotatably driven.
  • the drawing of the rod lb through the die 21 is achieved by applying the required longitudinal force in the direction of the arrow 23 to a gripping clamp 22 attached to the free end of the resulting formed rod lc.
  • the rod lb Prior to entering the die 21, the rod lb is heated to a temperature of about 120° to 125°C to allow the formation of the shaped helically ribs 3 on the rod lb. This drawing temperature should be as high as possible, but must be less than the melting temperature of the rod material, which is about 138° to 140°C.
  • the ribs 2 may be of any desired profile, although the gently rounded convex form shown in Fig. 2 of the drawings is presently preferred.
  • the ribs 2 may be oriented at any suitable helix angle, and angles of 60° and 70° have been found to be satisfactory. However, other angles may produce acceptable results.
  • Figs. 5 to 10 of the drawings two modifications of the above described embodiment, and a further embodiment of the invention are shown.
  • the formed rod 1 is formed with three equal ly spaced longitudinally extending grooves 6.
  • the grooves 6 may be formed by drawing the formed rod while still heated through a further die (not shown) having three longitudinally extending abutments, or by machining the grooves 6 in the surface of the rod.
  • This modification offers the additional advantage of providing a rod which will resist twisting within the matrix, adhesive or grouting under applied load. It will be appreciated that the concrete, adhesive or grouting will enter the groove 6 to thereby further key the rod into the surrounding material in a manner which resists twisting of the rod.
  • a somewhat similar effect may be achieved by forming diametrically opposed flattened areas 7 on the formed rod 1 in the manner shown in Figs. 7 and 8 of the drawings. This flattening of the formed rod 1 may be achieved by the use of heated rollers through which the required compressive force is applied to the rod 1.
  • a temperature of 10G°C was used at a flattening force of 1 tonne/10 cm of length. It will be appreciated that the formation of the flattened areas 7 on the formed rod will cause the rod to resist twisting within the surrounding matrix.
  • an oriented rod is drawn through a generally hexagonal die in hich each surface of the hexagon extends helically ith respect to the longitudinal axis of the die. The resulting rod has six flat portions 9 which extend helically around the rod in the manner shown in Fig. 9 of the drawings.
  • the embodiment of Figs. 1 and 2 may have its surface treated chemically to improve the bonding between the surface and the surrounding matrix.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Ropes Or Cables (AREA)

Abstract

La présente invention se rapporte à une tige (1) de polymère orienté fibrillaire, dans laquelle les fibrilles sont sensiblement parallèles les unes aux autres sur toute la longueur, sans torsion hélicoïdale sensible et au moins pratiquement sans interruption sur toute la longueur de l'article (1). Celui-ci est formé d'une multitude de nervures s'étendant hélicoïdalement (2), qui servent à améliorer l'accrochage de l'article dans une matrice telle que du béton, un adhésif ou un matériau de cimentation à base de mortier liquide.
PCT/AU1988/000248 1987-07-10 1988-07-08 Articles a base de polymere oriente Ceased WO1989000493A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI3072 1987-07-10
AU307287 1987-07-10

Publications (1)

Publication Number Publication Date
WO1989000493A1 true WO1989000493A1 (fr) 1989-01-26

Family

ID=3693552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1988/000248 Ceased WO1989000493A1 (fr) 1987-07-10 1988-07-08 Articles a base de polymere oriente

Country Status (1)

Country Link
WO (1) WO1989000493A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438809A1 (fr) * 1990-01-24 1991-07-31 MONOFIL-TECHNIK Gesellschaft für Synthese Monofile mbH Elément d'armature en matière synthétique pour armement des matériaux de construction ou similaires
WO2001051730A1 (fr) * 2000-01-13 2001-07-19 Dow Global Technologies Inc. Tiges d'armement pour structures en beton
US6706380B2 (en) 2000-01-13 2004-03-16 Dow Global Technologies Inc. Small cross-section composites of longitudinally oriented fibers and a thermoplastic resin as concrete reinforcement
RU2528265C2 (ru) * 2012-12-29 2014-09-10 Общество с ограниченной ответственностью "Машспецстрой" Способ изготовления стержневых изделий
DE102017219774A1 (de) 2017-11-07 2019-05-09 Leichtbau-Zentrum Sachsen Gmbh Verfahren und Anlage zur Herstellung von Faser-Matrix-Verbund-Profilen mit axial rotierendem Querschnitt und einstellbarer Faserorientierung
JP2020105753A (ja) * 2018-12-27 2020-07-09 頴司 芝 構造部材

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425883A (en) * 1941-08-08 1947-08-19 John G Jackson Concrete structural element reinforced with glass filaments
GB1480479A (en) * 1973-06-28 1977-07-20 Nat Res Dev Process for the production of polymer materials
GB2060469A (en) * 1979-06-06 1981-05-07 Nat Res Dev Drawing thermoplastics material
US4474426A (en) * 1981-10-06 1984-10-02 Northern Telecom Limited Optical cables
AU4070285A (en) * 1984-03-30 1985-10-03 British Technology Group Limited Die drawn tubular materials
EP0199348A2 (fr) * 1985-04-26 1986-10-29 Societe Nationale De L'amiante Barre de construction pour le renforcement de matériau en béton

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425883A (en) * 1941-08-08 1947-08-19 John G Jackson Concrete structural element reinforced with glass filaments
GB1480479A (en) * 1973-06-28 1977-07-20 Nat Res Dev Process for the production of polymer materials
GB2060469A (en) * 1979-06-06 1981-05-07 Nat Res Dev Drawing thermoplastics material
US4474426A (en) * 1981-10-06 1984-10-02 Northern Telecom Limited Optical cables
AU4070285A (en) * 1984-03-30 1985-10-03 British Technology Group Limited Die drawn tubular materials
EP0199348A2 (fr) * 1985-04-26 1986-10-29 Societe Nationale De L'amiante Barre de construction pour le renforcement de matériau en béton

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438809A1 (fr) * 1990-01-24 1991-07-31 MONOFIL-TECHNIK Gesellschaft für Synthese Monofile mbH Elément d'armature en matière synthétique pour armement des matériaux de construction ou similaires
WO2001051730A1 (fr) * 2000-01-13 2001-07-19 Dow Global Technologies Inc. Tiges d'armement pour structures en beton
US6612085B2 (en) 2000-01-13 2003-09-02 Dow Global Technologies Inc. Reinforcing bars for concrete structures
US6706380B2 (en) 2000-01-13 2004-03-16 Dow Global Technologies Inc. Small cross-section composites of longitudinally oriented fibers and a thermoplastic resin as concrete reinforcement
RU2528265C2 (ru) * 2012-12-29 2014-09-10 Общество с ограниченной ответственностью "Машспецстрой" Способ изготовления стержневых изделий
DE102017219774A1 (de) 2017-11-07 2019-05-09 Leichtbau-Zentrum Sachsen Gmbh Verfahren und Anlage zur Herstellung von Faser-Matrix-Verbund-Profilen mit axial rotierendem Querschnitt und einstellbarer Faserorientierung
DE102017219774B4 (de) 2017-11-07 2024-11-14 Leichtbau-Zentrum Sachsen Gmbh Verfahren und Anlage zur Herstellung von Faser-Matrix-Verbund-Profilen mit axial rotierendem Querschnitt und einstellbarer Faserorientierung, sowie Verwendung eines entsprechenden Verfahrens und einer Anlage
JP2020105753A (ja) * 2018-12-27 2020-07-09 頴司 芝 構造部材

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