WO2004071759A1 - A flexible mounting system - Google Patents

A flexible mounting system Download PDF

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Publication number
WO2004071759A1
WO2004071759A1 PCT/GB2004/000562 GB2004000562W WO2004071759A1 WO 2004071759 A1 WO2004071759 A1 WO 2004071759A1 GB 2004000562 W GB2004000562 W GB 2004000562W WO 2004071759 A1 WO2004071759 A1 WO 2004071759A1
Authority
WO
WIPO (PCT)
Prior art keywords
monofilaments
substrate
rigid
mounting system
fabric sheets
Prior art date
Application number
PCT/GB2004/000562
Other languages
French (fr)
Inventor
John Edmund Dower
Andrew David Dower
Original Assignee
Technical Lightweight Composites 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 Technical Lightweight Composites Ltd filed Critical Technical Lightweight Composites Ltd
Publication of WO2004071759A1 publication Critical patent/WO2004071759A1/en

Links

Classifications

    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B5/026—Knitted 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/025—Particulate 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
    • 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
    • B32B2262/0276—Polyester 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/18—Fabrics, textiles
    • B32B2305/186—Knitted fabrics
    • 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
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/12—Ships

Definitions

  • THIS INVENTION concerns mounting systems such as are required for mounting of insulating materials onto substrates in areas of stress or vibration.
  • a typical application for this invention is the attachment of thermal and acoustic insulation to the interior surfaces of the hulls of ships or to machinery or enclosures subject to earthquakes.
  • Mats and felts may be used but these are difficult to apply without them becoming impregnated with adhesive during installation with consequent loss of flexibility.
  • Foamed plastics as a further alternative are found to be similarly unsuitable having moderate mechanical integrity at acceptable thicknesses.
  • a flexible and insulating mounting system for attaching rigid or semi-rigid materials to a substrate in face-to-face relationship, comprising a three-dimensional sheet material of the kind consisting of a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally perpendicular to the fabric sheets, the sheet material being adapted for bonding respectively to the rigid or semi-rigid material and the substrate.
  • Interstitial spaces defined by and between the monofilaments should be maintained substantially free of any bonding medium.
  • At least one of the fabric sheets may be a knitted fabric.
  • the monofilaments may be of polyester.
  • a method of attaching a composite material sheet to a generally planar substrate in face-to-face relationship comprising the steps of providing a three-dimensional sheet material of the kind consisting of a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally perpendicular to the fabric sheets, bonding one of said fabric sheets to an adjacent surface of the composite material and the opposed fabric sheet to the substrate.
  • two layers 10 of the syntactic composite insulating material such as sintered foamed glass pellets defining interstitial spaces between the pellets which may be at least partially impregnated by a reinforcing filler, are disposed in face-to-face relationship with the internal surface of a ship's hull 11.
  • the material 10 is attached to the hull 11 by the intermediary of a sheet material 12.
  • the interposed material 12 may be a product known as "space fabric". This is a three-dimensional material formed by two layers 13 of knitted fabric spatially separated and supported by a "forest" of short monofilaments 14 set pe ⁇ endicular to the knitted layers 13.
  • the monofilaments are preferably of polyester.
  • the interstitial spaces between the monofilaments may be substantially free of any adhesive substance. Such a material has considerable crush strength while maintaining a substantial degree of flexibility between the two fabric sheets.
  • the overall thickness of the inte ⁇ osed material is preferably in the region of 10mm while the two sheets of insulating material 10 may be some 35mm each so that the overall insulating thickness is in the region of 80mm.
  • individual panels of rigid or semi-rigid insulating material made up of the sheets 10 and 12 may be manufactured prior to installation by bonding the sheet 12 to the sheet 10 using an inorganic adhesive which may be non- combustible, and may be cured before the material is installed.
  • the panels may be, for example, rectangular and perhaps V ⁇ metres by 1 metre across so as to be easily manoeuvred on-board ship, to the required site.
  • An adhesive 15 is applied to the hull or to the face of the sheet 12 remote from the sheet 10.
  • the panel may then be applied to the hull 11 and the complete insulating layer assembled by applying the panels in edge-to-edge relationship with, if required, an adhesive between the respective panels.
  • the resilient polyester monofilaments 14 provide effective support for the insulation material 10 while providing excellent matrixes to encourage bonding.
  • the knitted fabric sheets 13 may be chosen for optimum support and resistance to mechanical stress in service.
  • the three-dimensional sheet material 12 serves as a means of accurately determining the distance between the insulation material 10 and the ship's hull 11, which would be difficult to achieve using adhesives alone. It also provides a substantial degree of flexibility whilst being both stable and robust. It provides a cushion against major impacts caused, perhaps, by waves impacting on the ship's hull, and provides an essentially empty layer between the hull 11 and the material 10 for increased acoustic and thermal insulation.
  • the flexibility of the three-dimensional material layer 12 ensures continuity of attachment of the insulation 10 to the ship's hull in the event of cracking or other damage occurring in the insulation material.
  • the adhesive 15 used to bond the three-dimensional material to the ship's hull may include corrosion inhibitors.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

A flexible and insulating mounting system for attaching composite insulating materials (10) to a substrate such as a ship's hull (11), including a layer of 'space fabric' (12) bonded to and between the insulating material (10) and the ship's hull (11) and consisting of a pair of superimposed knitted fabric sheets (13) spatially separated and supported by a plurality of monofilaments (14) disposed perpendicular to the knitted sheets (13). The system ensures a flexible mount between the insulation material (10) and the ship's hull (11) thus to absorb stresses and vibration in use while retaining the integrity and acoustic and thermal insulating properties of the composite material (10).

Description

A FLEXIBLE MOUNTING SYSTEM
THIS INVENTION concerns mounting systems such as are required for mounting of insulating materials onto substrates in areas of stress or vibration.
Attempts to attach rigid or semi-rigid materials permanently to other materials subject to vibration or other mechanical stress are beset by the tendency for the rigid materials to be fractured or otherwise physically damaged by the mechanical stresses imposed upon them, and thus by the effect of the rigid materials becoming detached.
A typical application for this invention is the attachment of thermal and acoustic insulation to the interior surfaces of the hulls of ships or to machinery or enclosures subject to earthquakes.
In the hull of a ship which requires insulation to be applied thus to avoid excessive transmission of cold and noise there is continuous and sometimes excessive vibration as well as severe torsional and impact stresses, particularly when the ship travels through heavy seas.
It is therefore necessary to develop a method of attachment which will withstand these stresses if the service life of such insulation is to be ensured, while the insulation must be lightweight and easily applied to the internal surface of a ship's hull in situ. It is therefore necessary to provide some form of flexible inter-layer between the hull of the ship and the insulation material to be applied thereto. While flexible adhesives have been considered for this purpose it is necessary to apply a sufficiently thick layer to accommodate the potential movement and this is not ideal for the purpose of installation. Consequently, adhesives alone do not provide a sufficient degree of flexibility in extreme ship-board applications.
Mats and felts may be used but these are difficult to apply without them becoming impregnated with adhesive during installation with consequent loss of flexibility.
Foamed plastics as a further alternative are found to be similarly unsuitable having moderate mechanical integrity at acceptable thicknesses.
It is an object of the present invention to provide a mounting system including an inter-layer to be disposed between insulating material and the substrate to which it is applied, such inter-layer providing adequate support for the insulating material and isolation from the source of stress.
According to the present invention, there is provided a flexible and insulating mounting system for attaching rigid or semi-rigid materials to a substrate in face-to-face relationship, comprising a three-dimensional sheet material of the kind consisting of a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally perpendicular to the fabric sheets, the sheet material being adapted for bonding respectively to the rigid or semi-rigid material and the substrate.
Interstitial spaces defined by and between the monofilaments should be maintained substantially free of any bonding medium.
At least one of the fabric sheets may be a knitted fabric.
The monofilaments may be of polyester.
Also, according to the invention is a method A method of attaching a composite material sheet to a generally planar substrate in face-to-face relationship, comprising the steps of providing a three-dimensional sheet material of the kind consisting of a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally perpendicular to the fabric sheets, bonding one of said fabric sheets to an adjacent surface of the composite material and the opposed fabric sheet to the substrate.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying schematic drawing illustrating, in cross-section, a substrate and an insulating material, between which is located a mounting system comprising a three-dimensional sheet material in accordance with the invention. In this embodiment it is to be understood that a mounting system in accordance with the invention is to be used to attach panels of acoustic and thermal insulation material to the internal surface of a ship's hull. The insulating material is preferably a syntactic composite material having inherent brittle properties and which must be attached to the hull in such a way that the integrity of the insulating material is not compromised by unevenness in the surface of the ship's hull and by stresses and movements occurring when the ship is at sea.
Referring now to the drawing, in this example, two layers 10 of the syntactic composite insulating material such as sintered foamed glass pellets defining interstitial spaces between the pellets which may be at least partially impregnated by a reinforcing filler, are disposed in face-to-face relationship with the internal surface of a ship's hull 11.
In accordance with the invention, the material 10 is attached to the hull 11 by the intermediary of a sheet material 12.
The interposed material 12 may be a product known as "space fabric". This is a three-dimensional material formed by two layers 13 of knitted fabric spatially separated and supported by a "forest" of short monofilaments 14 set peφendicular to the knitted layers 13. The monofilaments are preferably of polyester. The interstitial spaces between the monofilaments may be substantially free of any adhesive substance. Such a material has considerable crush strength while maintaining a substantial degree of flexibility between the two fabric sheets. The overall thickness of the inteφosed material is preferably in the region of 10mm while the two sheets of insulating material 10 may be some 35mm each so that the overall insulating thickness is in the region of 80mm.
In use, individual panels of rigid or semi-rigid insulating material made up of the sheets 10 and 12 may be manufactured prior to installation by bonding the sheet 12 to the sheet 10 using an inorganic adhesive which may be non- combustible, and may be cured before the material is installed. The panels may be, for example, rectangular and perhaps VΛ metres by 1 metre across so as to be easily manoeuvred on-board ship, to the required site.
An adhesive 15 is applied to the hull or to the face of the sheet 12 remote from the sheet 10. The panel may then be applied to the hull 11 and the complete insulating layer assembled by applying the panels in edge-to-edge relationship with, if required, an adhesive between the respective panels.
Certain advantages accrue from the use of a material produced and mounted in this mamier. The resilient polyester monofilaments 14 provide effective support for the insulation material 10 while providing excellent matrixes to encourage bonding. The knitted fabric sheets 13 may be chosen for optimum support and resistance to mechanical stress in service.
The three-dimensional sheet material 12 serves as a means of accurately determining the distance between the insulation material 10 and the ship's hull 11, which would be difficult to achieve using adhesives alone. It also provides a substantial degree of flexibility whilst being both stable and robust. It provides a cushion against major impacts caused, perhaps, by waves impacting on the ship's hull, and provides an essentially empty layer between the hull 11 and the material 10 for increased acoustic and thermal insulation.
The flexibility of the three-dimensional material layer 12 ensures continuity of attachment of the insulation 10 to the ship's hull in the event of cracking or other damage occurring in the insulation material.
By attaching one surface of the three-dimensional sheet material 12 with a non-combustible adhesive, the further use of a modest organic adhesive is permitted without exceeding permitted levels of organic components for the whole system.
The adhesive 15 used to bond the three-dimensional material to the ship's hull may include corrosion inhibitors.

Claims

1. A flexible mounting system for attaching rigid or semi-rigid materials to a substrate in face-to-face relationship, comprising a three-dimensional sheet material of the kind having a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally peφendicular to and bonded at their respective ends, to the fabric sheets, the sheet material being adapted for bonding respectively to the rigid or semi-rigid material and the substrate.
2. A mounting system according to Claim 1, wherein interstitial spaces defined by and between the monofilaments are maintained substantially free of any bonding medium.
3. A mounting system according to Claim 1 or Claim 2, wherein at least one of the fabric sheets is a knitted fabric.
4. A mounting system according to any preceding claim, wherein the monofilaments are of polyester.
5. A mounting system according to any preceding claim, wherein the rigid or semi-rigid material is a pre-formed syntactic composite material of particulate structure defining interstitial spaces between the particles thereof and at least partially impregnated in the interstitial spaces by a reinforcing filler.
6. An insulating material for attachment to a substrate in face-to-face relationship, the material comprising a syntactic composite material of particulate structure bonded to a three-dimensional sheet of the kind having a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally peφendicular thereto, where the interstitial spaces defined by and between the monofilaments are substantially free of any bonding medium.
7. A method of attaching a non-combustible composite material sheet to a substrate in face-to-face relationship, comprising the steps of providing a tliree-dimensional sheet material of the kind having a pair of superimposed fabric sheets spatially separated and supported by a plurality of monofilaments disposed generally peφendicular to the fabric sheets, bonding one of said fabric sheets to an adjacent surface of the composite material and the opposed fabric sheet to the substrate.
8. A method according to Claim 7, wherein the composite material and the three-dimensional sheet material are bonded together to manufacture individual panels prior to attachment thereof to the substrate.
9. A method according to Claim 8, wherein the composite material and the three-dimensional sheet material are bonded using an inorganic adhesive.
PCT/GB2004/000562 2003-02-11 2004-02-11 A flexible mounting system WO2004071759A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0303025.1A GB0303025D0 (en) 2003-02-11 2003-02-11 Flexible mounting
GB0303025.1 2003-02-11

Publications (1)

Publication Number Publication Date
WO2004071759A1 true WO2004071759A1 (en) 2004-08-26

Family

ID=9952759

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/000562 WO2004071759A1 (en) 2003-02-11 2004-02-11 A flexible mounting system

Country Status (2)

Country Link
GB (1) GB0303025D0 (en)
WO (1) WO2004071759A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438226A (en) * 1973-06-27 1976-06-03 Mitsubishi Chem Ind Cryogenic insulating structure
DE19637062A1 (en) * 1996-09-12 1998-03-19 Blohm Voss Ag Insulation for hull of ship
US5958533A (en) * 1995-04-06 1999-09-28 Stowe Woodward Company Covered roll and a method for making the same
JP2003013346A (en) * 2001-06-27 2003-01-15 Suminoe Textile Co Ltd Three-dimensional knitted fabric

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438226A (en) * 1973-06-27 1976-06-03 Mitsubishi Chem Ind Cryogenic insulating structure
US5958533A (en) * 1995-04-06 1999-09-28 Stowe Woodward Company Covered roll and a method for making the same
DE19637062A1 (en) * 1996-09-12 1998-03-19 Blohm Voss Ag Insulation for hull of ship
JP2003013346A (en) * 2001-06-27 2003-01-15 Suminoe Textile Co Ltd Three-dimensional knitted fabric

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 05 12 May 2003 (2003-05-12) *

Also Published As

Publication number Publication date
GB0303025D0 (en) 2003-03-12

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