GB2075913A - Thermal insulating materials - Google Patents

Thermal insulating materials Download PDF

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Publication number
GB2075913A
GB2075913A GB8015979A GB8015979A GB2075913A GB 2075913 A GB2075913 A GB 2075913A GB 8015979 A GB8015979 A GB 8015979A GB 8015979 A GB8015979 A GB 8015979A GB 2075913 A GB2075913 A GB 2075913A
Authority
GB
United Kingdom
Prior art keywords
woven
layer
sheet material
sheet
woven fabric
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.)
Granted
Application number
GB8015979A
Other versions
GB2075913B (en
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.)
Perifleur Products Ltd
Original Assignee
Perifleur Products 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 Perifleur Products Ltd filed Critical Perifleur Products Ltd
Priority to GB8015979A priority Critical patent/GB2075913B/en
Publication of GB2075913A publication Critical patent/GB2075913A/en
Application granted granted Critical
Publication of GB2075913B publication Critical patent/GB2075913B/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • 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
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
    • A01G2009/1453—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches containing textile products
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
    • A01G2009/1461—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches containing woven structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Laminated Bodies (AREA)
  • Greenhouses (AREA)

Abstract

A thermal insulating material for use as an insulating screen in a glass house, comprises a layer of woven or non-woven fabric having bonded or laminated to one side thereof a layer of thermoplastics material bearing on the surface thereof not in contact with the layer of non-woven fabric a reflective layer formed of a deposited metal. In one embodiment, each surface of the layer of woven or non-woven fabric is provided with a layer of thermoplastics sheet material bearing the reflective metal layer. In a modification of the invention, the sheet material is slit to form narrow ribbons which are woven or knitted to form a reflective, thermal insulating, fabric.

Description

SPECIFICATION Thermal insulating materials This invention is concerned with improvements in and relating to laminated materials suitable for use as thermal insulating screens, especially in glasshouses.
It is known to provide a glasshouse with a screen extending generally horizontally across the house at a position intermediate the floor and roof of the house, for example at about the level of the eaves of the house, which screen has a reflective surface so as to minimise energy loss from the house and thereby conserve energy with the house and effect a fuel saving when the house is heated by means other than natural radiation. Such screens are generally arranged with the reflective surface upwards to reduce any emission from the house although in some cases the screen may be arranged with the reflective surface downwards. The screen is generally made of a flexible sheet material provided with a metallic reflective surface since it is desirable that the screen be readily demountable.
It is an object of the present invention to provide a sheet material which may be used to form a screen as described above.
Accordingly, one embodiment of the present invention provides a flexible sheet material comprising a layer of woven or non-woven fabric having bonded or laminated to one side thereof a layer of a thermoplastics sheet material bearing on the surface thereof not in contact with the layer of non-woven fabric a reflective layer formed of a metal.
The layer of woven or non-woven fabric, which forms the base layer of the sheet material of the invention, may be formed of any suitable synthetic fibres and conveniently takes the form of a spun bonded polyolefin non-woven sheet such as that sold under the Trade Mark "Tyvek" by Dupont. Such layers preferably have a thickness of from 5 to 25 microns.
One surface of the base woven or non-woven layer is bonded or laminated to a sheet of thermoplastic material, preferably a polyester material, which preferably has a thickness of from 10 to 15 microns and such bonding or lamination may be effected by means of a suitable adhesive such as an eposy adhesive. The side of the sheet not in contact with the base layer is provided with a reflective metal layer, suitably of aluminium. The side of the sheet in contact with the base layer may also be metallised.
The sheet material of the invention is conveniently prepared by forming a reflective layer of metal on the surface of the thermoplastic sheet, suitably by vacuum deposition, and then bonding the metallized sheet to the base layer of woven or non-woven fabric.
Preferably the surface of the base layer not in contact with the metallized thermoplastics layer is provided with an additional laminated sheet of thermoplastics material in order to provide protection against U.V. radiation and in accordance with a particularly preferred embodiment of the invention this additional sheet of thermoplastics metal is also provided with a metallized reflective surface on the surface not in contact with the non-woven base layer; thereby providing a sheet material having a reflective surface on both sides thereof. In this case it may be useful to employ as base material a micropuncture base material whereby the adhesive bonds the metallised thermoplastic layers through and to the base layer.
The sheet material of the invention has been found to be resistant to tear propagation should any accidental holing or rupture of the sheet cover occur.
If the base layer is made of a continuous sheet or film of plastics material such as a polyolefin it has been found that accidental holing or rupture of the sheet readily leads to tear propagation and hence consequent diminution in the usefulness of the material. Further the resistance to tear propagation makes it possible to deliberately introduce perforations, for example by micropunching, into the sheets and it has been found useful to do this in order to render the sheet permeable to water so that, when used as a glasshouse screen, any water accumulating on the upper surface of the screen may drain through it. It has been found that if water is allowed to accumulate on the upper surface of the screen it can lead to problems and even to rupture of the screen in extreme cases.
The resistance to tear propagation also makes it possible to join sheets of the material of invention together by a simple sewing technique, which simplifies the production and reduces the cost, of the large sizes of screens used in commercial glasshouses.
Screens formed of the sheet material of the invention may, in addition to being used as thermal barrier screens, be used as day length control screens, i.e. screens which are drawn across the house to prevent light reaching plants growing therein. In some instances it is most desirable to have as complete darkness in the house as possible and, as will be appreciated, perforated screens will permit the passage of sunlight. This problem may be overcome, however, by sewing a fibrous thread, preferably a dark coloured thread, in a coarse stitch through the screen whereby the screen is perforated where the thread passes through it but is impervious to light by virtue of the presence of the thread in the perforations whilst remaining pervious to water which can soak through the thread.
The metallized surfaces of the material of the invention can have a reflectivity of greater then 90%, thereby giving good energy saving, in contrast to directly metallized non-woven fabrics which can attain a reflectivity of not better than about 70%. The particularly preferred material of the invention, i.e.
that which is provided with two metallized surfaces, will generally show an improved effect as a thermal barrier over the material having only one metallized surface. Further, sheets having a reflective surface on the underside are useful where the useful where the house is provided with replacement or supplemental light whilst sheets having a reflective upper furface serve to reflect unwanted solar radiation when the sheet is used as a short day curtain.
The sheet material of the invention may also serve as a starting material for the manufacture ofthermal glasshouse screens of a woven or knitted constcuo tion. Thus the sheet material isslit or converted into relatively narrow ribbons e.g. having a width of 2 mm, and those ribbons are then woven or knitted to form a fabric which may be used as a glasshouse screen, and which is provided as a furtherfeatureof the invention. The ribbons produced by slitting the sheet have reduced stretch and thus have a reduced tendencyto become demetallizedwhen subjected to local stress which may occur when they are knitted or woven.
The invention also provides a glasshouse provided with a generally horizontally located, preferably demountable, screen formed of a sheet material or fabric in accordance with the invention and located at a position intermediate the floor and the roof of the house. Where the screen is demountable it may, for example, be attached at one edge to a roller extending along one side of the house whereby it may be rolled up on the roller when not in use and, when in use, drawn across the house, generally being supported at positions along the length of the house by support means such as support wires.

Claims (9)

1. A flexible sheet material comprising a layer of woven or non-woven fabric having bonded or laminated to one side thereof a layer of a thermoplastic sheet material bearing, on the surface thereof not in contact with the layer of non-woven fabric, a layer formed of a metal.
2. A flexible sheet material as claimed in claim 1 in which the layer of woven or non-woven fabric comprises a spun bonded non-woven sheet formed of a polyolefin.
3. Aflexible sheet material as claimed in claim 1 or claim 2 in which the surface of the layer of woven or non-woven fabric not in contact with the metallised thermoplastics layer is provided with an additional laminated sheet of thermoplastics material.
4. A flexible sheet material as claimed in claim 3 in which said additional laminated sheet of thermoplastics materials is also provided with a metallised reflective surface on the surface thereof not in contact with the woven or non-woven fabric.
5. A flexible sheet material as claimed in any one of the preceding claims provided with perforations.
6. A flexible sheet material as claimed in claim 5 wherein the sheet is perforated by sewing a fibrous thread through the screen.
7. Aflexible sheet material as claimed in claim 1 substantially as hereinbefore described.
8. A sheet material of woven or knitted construction formed from narrow ribbons of a sheet material as claimed in any one of the preceding claims.
9. A glass house provided with a generally horizontally located screen formed of a sheet material or fabric as claimed in any one of the preceding claims.
GB8015979A 1980-05-14 1980-05-14 Thermal insulating materials Expired GB2075913B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8015979A GB2075913B (en) 1980-05-14 1980-05-14 Thermal insulating materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8015979A GB2075913B (en) 1980-05-14 1980-05-14 Thermal insulating materials

Publications (2)

Publication Number Publication Date
GB2075913A true GB2075913A (en) 1981-11-25
GB2075913B GB2075913B (en) 1984-05-02

Family

ID=10513432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8015979A Expired GB2075913B (en) 1980-05-14 1980-05-14 Thermal insulating materials

Country Status (1)

Country Link
GB (1) GB2075913B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172546A (en) * 1985-03-21 1986-09-24 Compton Webb Careerwear Limite Reversible textile articles
GB2237194A (en) * 1989-10-11 1991-05-01 Fellwrap Ltd Blankets
EP0495143A2 (en) * 1989-07-10 1992-07-22 E.I. Du Pont De Nemours And Company Process for making metallized polyethylene plexifilamentary film-fibril sheet
EP0755775A1 (en) * 1995-07-27 1997-01-29 Zodiac International Substantially rigid, thermally insulating panel and method for its manufacture
GB2389073A (en) * 2002-05-29 2003-12-03 Wilkie J & D Ltd Thermal camouflage fabric and method of production
EP1926591A1 (en) * 2005-09-21 2008-06-04 Lockheed Martin Corporation Metallized flexible laminate material for lighter-than-air vehicles
EP2111099A1 (en) * 2007-01-28 2009-10-28 Ludvig Svensson B.V. Greenhouse screen
WO2010020807A1 (en) * 2008-08-16 2010-02-25 Qe (Quantum Equilibrium) International Ltd Electrostatic neutralisation
WO2019090278A1 (en) * 2017-11-06 2019-05-09 Federal-Mogul Powertrain Llc Battery cover and method of construction thereof

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172546A (en) * 1985-03-21 1986-09-24 Compton Webb Careerwear Limite Reversible textile articles
EP0495143A2 (en) * 1989-07-10 1992-07-22 E.I. Du Pont De Nemours And Company Process for making metallized polyethylene plexifilamentary film-fibril sheet
EP0495143A3 (en) * 1989-07-10 1993-06-23 E.I. Du Pont De Nemours And Company Process for making metallized polyethylene plexifilamentary film-fibril sheet
GB2237194A (en) * 1989-10-11 1991-05-01 Fellwrap Ltd Blankets
EP0755775A1 (en) * 1995-07-27 1997-01-29 Zodiac International Substantially rigid, thermally insulating panel and method for its manufacture
US5731052A (en) * 1995-07-27 1998-03-24 Zodiac International Substantially rigid thermally insulating panel and method for manufacturing it
GB2389073A (en) * 2002-05-29 2003-12-03 Wilkie J & D Ltd Thermal camouflage fabric and method of production
JP2009508730A (en) * 2005-09-21 2009-03-05 ロッキード・マーチン・コーポレーション Metalized flexible laminates for vehicles that are lighter than air
EP1926591A1 (en) * 2005-09-21 2008-06-04 Lockheed Martin Corporation Metallized flexible laminate material for lighter-than-air vehicles
EP1926591A4 (en) * 2005-09-21 2009-10-28 Lockheed Corp Metallized flexible laminate material for lighter-than-air vehicles
EP2111099A1 (en) * 2007-01-28 2009-10-28 Ludvig Svensson B.V. Greenhouse screen
US20090300979A1 (en) * 2007-01-28 2009-12-10 Goran Henningsson Greenhouse screen
EP2111099A4 (en) * 2007-01-28 2013-05-22 Svensson Ludvig Bv Greenhouse screen
WO2010020807A1 (en) * 2008-08-16 2010-02-25 Qe (Quantum Equilibrium) International Ltd Electrostatic neutralisation
GB2475211A (en) * 2008-08-16 2011-05-11 Wudh Chayabutra Electrostatic neutralisation
WO2019090278A1 (en) * 2017-11-06 2019-05-09 Federal-Mogul Powertrain Llc Battery cover and method of construction thereof
US11081751B2 (en) 2017-11-06 2021-08-03 Federal-Mogul Powertrain Llc Battery cover and method of construction thereof

Also Published As

Publication number Publication date
GB2075913B (en) 1984-05-02

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PCNP Patent ceased through non-payment of renewal fee