EP0058499A1 - Imprägnierung von Holz - Google Patents

Imprägnierung von Holz Download PDF

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Publication number
EP0058499A1
EP0058499A1 EP82300609A EP82300609A EP0058499A1 EP 0058499 A1 EP0058499 A1 EP 0058499A1 EP 82300609 A EP82300609 A EP 82300609A EP 82300609 A EP82300609 A EP 82300609A EP 0058499 A1 EP0058499 A1 EP 0058499A1
Authority
EP
European Patent Office
Prior art keywords
timber
impregnating medium
impregnating
timber member
groove
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
EP82300609A
Other languages
English (en)
French (fr)
Inventor
Douglas Harry Meridew Brooks
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.)
BLACKNELL BUILDING PRODUCTS Ltd
Blacknell Buildings Ltd
Original Assignee
BLACKNELL BUILDING PRODUCTS Ltd
Blacknell Buildings 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 BLACKNELL BUILDING PRODUCTS Ltd, Blacknell Buildings Ltd filed Critical BLACKNELL BUILDING PRODUCTS Ltd
Publication of EP0058499A1 publication Critical patent/EP0058499A1/de
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/30—Coverings, e.g. protecting against weather, for decorative purposes

Definitions

  • the present invention relates to a method of impregnating timber which is coated with a plastics material.
  • the invention is particularly applicable to but not restricted to impregnating plastics coated softwood timber used in the construction of window frames. By suitably choosing the impregnating material it is possible to resist the effect of rot and insects on the impregnated timber.
  • the timber is treated with chemicals in aqueous solution, and the chemicals are allowed to diffuse through the timber over a prolonged period of time at normal atmospheric temperature and pressure.
  • Disadvantages of this method are the initially high moisture content required of the timber, the required duration of the method (up to six weeks) and a tendency for the chemicals eventually to leach out under certain wet conditions.
  • Another disadvantage is the tendency of certain of the chemicals used eventually to corrode metal fixings which may be attached when assembling the final product, such as for example a window or door.
  • Another previously proposed method comprises using chemicals in a water medium in an autoclave process. Although this method completely impregnates the timber, the method is not favoured for use with joinery timber because it hardens the timber and makes it brittle and more difficult to machine.
  • plastics coated timber members are particularly suitable for use in the manufacture of window frames and allied products where previously it has been difficult or costly to achieve a satisfactory total preservative impregnation of the timber member.
  • an elongate softwood timber member 2 has two spaced longitudinal grooves 4 and 6 extending along its length.
  • the timber member 2 is encased in an extruded casing 8 of plastics material.
  • a suitable plastics material is an unplasticised polyvinyl chloride or modified polyvinyl chloride.
  • Figure 2 illustrates a cross-section of a softwood timber member 2 having the same cross-section as the member 2 of Figure 1.
  • the member 2 of Figure 2 has only a single longitudinal groove 4 extending along its length.
  • Figure 3 illustrates a cross-section of a laminated softwood timber member 10 made up of four separate timber pieces 12, 14, 16 and 18.
  • This timber member 10 has therein the same longitudinal grooves 4 and 6 as the aforementioned timber members 2 of Figures 1 and 2. However in the case of the timber member 10, the four timber pieces 12 to 18 are glued together so that a part of one of the grooves 4 and 6 is located in each timber piece.
  • Figure 4 illustrates a cross-section of a laminated - softwood timber member 20 having two spaced longitudinal grooves 22 and 24 extending along its length.
  • the timber member 20 is made up of three separate timber pieces 26, 28 and 30, which are glued together so that a part of one of the grooves 22 and 24 extends into each of the three pieces 26 to 30.
  • a suitable liquid bearing impregnating medium which may be in viscous liquid or paste form, is located in each one of the grooves 4, 6, 22 and 24, and the timber members 2, 10 and 20 are encased in a casing of suitable plastics material as illustrated in Figure 5.
  • Suitable solvents constituting the liquid part of the liquid bearing impregnating medium, are aliphatic hydrocarbons, isoparaffin or ethylene glycol.
  • Standard gelling agents such as hydrogenated castor oil or a bentonite may be used if the liquid bearing impregnating medium is to be used in paste form.
  • the size of the grooves 4, 6, 22 and 24 is determined by experiment to provide a sufficient volume of preservative to fully saturate the timber member when impregnation is complete.
  • tributyltin oxide An example of a suitable chemical preservative is tributyltin oxide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP82300609A 1981-02-12 1982-02-08 Imprägnierung von Holz Ceased EP0058499A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8104408 1981-02-12
GB8104408 1981-02-12

Publications (1)

Publication Number Publication Date
EP0058499A1 true EP0058499A1 (de) 1982-08-25

Family

ID=10519651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82300609A Ceased EP0058499A1 (de) 1981-02-12 1982-02-08 Imprägnierung von Holz

Country Status (2)

Country Link
EP (1) EP0058499A1 (de)
GB (1) GB2093081A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ280874A (en) * 1996-01-23 1997-08-22 Nz Forest Research Inst Ltd Prevention of sapstain in wood by applying a water barrier over the wood surface
DE19652951A1 (de) * 1996-12-19 1998-06-25 Univ Dresden Tech Verfahren zur konservierenden Lagerung von frischem Rundholz
GB2400815B (en) * 2003-04-22 2006-11-01 Ian Malcolm Robertson A method of making wooden objects, preferably for use in the manufacture of window or door frames and beams for structural use

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351097A (de) * 1955-12-24 1960-12-31 Osmose Holzimpraegnierung Carl Manschette mit im pastösen Zustand befindlichem, wasserlöslichem Holzimprägniermittel
FR2385506A1 (fr) * 1977-03-29 1978-10-27 Hoeka Sierpleisters Muurverven Procede de traitement du bois par un agent de preservation du bois et bois traite par ledit agent de preservation du bois
CA1058353A (en) * 1976-06-21 1979-07-17 John Krzyzewski Thickened ammonia-base wood preservatives

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351097A (de) * 1955-12-24 1960-12-31 Osmose Holzimpraegnierung Carl Manschette mit im pastösen Zustand befindlichem, wasserlöslichem Holzimprägniermittel
CA1058353A (en) * 1976-06-21 1979-07-17 John Krzyzewski Thickened ammonia-base wood preservatives
FR2385506A1 (fr) * 1977-03-29 1978-10-27 Hoeka Sierpleisters Muurverven Procede de traitement du bois par un agent de preservation du bois et bois traite par ledit agent de preservation du bois

Also Published As

Publication number Publication date
GB2093081A (en) 1982-08-25

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19830211

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19850128

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BROOKS, DOUGLAS HARRY MERIDEW