GB2348850A - Acoustic and thermal insulating material - Google Patents

Acoustic and thermal insulating material Download PDF

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Publication number
GB2348850A
GB2348850A GB0009192A GB0009192A GB2348850A GB 2348850 A GB2348850 A GB 2348850A GB 0009192 A GB0009192 A GB 0009192A GB 0009192 A GB0009192 A GB 0009192A GB 2348850 A GB2348850 A GB 2348850A
Authority
GB
United Kingdom
Prior art keywords
insulating material
layer
sheets
acoustic
foam
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
GB0009192A
Other versions
GB2348850B (en
GB0009192D0 (en
Inventor
Vincent Thomas
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.)
AIRISOL
Original Assignee
AIRISOL
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 AIRISOL filed Critical AIRISOL
Publication of GB0009192D0 publication Critical patent/GB0009192D0/en
Publication of GB2348850A publication Critical patent/GB2348850A/en
Priority to CNB2006100057842A priority Critical patent/CN100377179C/en
Application granted granted Critical
Publication of GB2348850B publication Critical patent/GB2348850B/en
Priority to HK06109865A priority patent/HK1089539A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • 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
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B2001/7691—Heat reflecting layers or coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

An acoustic and thermal insulating material for buildings comprises exterior surfaces which are made up of a continuous layer (1, l') containing aluminium, hot-welded on the external surface of a sheet (2, 2') of film of synthetic material containing bubbles. The material also comprises, interposed between the internal surfaces of the sheets (2, 2') of bubble film, at least one layer (3) of foam rendered fire-retardant, made of synthetic material and joined to the sheets (2, 2') of bubble film solely by longitudinal welding lines (4, 4', 4") rendering the longitudinal peripheral edges an integral whole and an essentially median zone of the various thicknesses of the insulating material so as to provide, between the internal surfaces of the bubble films (2, 2') and the foam layer (3), sheets of air (5, 5').

Description

Acoustic and thermal insulating material The present invention relates to a fire-retardant thermal and acoustic insulating material, in particular for the insulation of buildings.
It relates more particularly to a thermal and acoustic insulating material based on films containing air bubbles.
The acoustic and thermal insulating materials produced from sheets of films containing air bubbles have now been described in the literature. Thus, a flame-resistant insulating covering consisting of two sheets of film containing air bubbles covered by a non-flammable material and assembled together by stitching or spot welding around the periphery of the covering and the insertion of rivets over the remainder of the surface is known from the patent US-A 4 038 447. The disadvantage of such a covering is the fact that there are some air passages within the covering which make it impossible to obtain satisfactory assurances of safety in respect of flame.
French Patent No. 2 616 377, which is an improvement of the US Patent, has proposed thermic welding of the edges of the covering instead of stitching around the periphery of the films and the insertion of rivets on the surface, the value being in avoiding stitching of the two sheets making up the product. However, this single solution has not proved satisfactory from the acoustic standpoint. Similarly, from the thermal standpoint it has proved necessary to envisage improvements to the insulation characteristics of such an insulating material.
Another solution has therefore been proposed in the context of the patent EP-A 0 718 447. In this document the insulating material comprises an assembly formed from at least two films of synthetic material enclosing air bubbles rendered uniformly integral at one of their respective face by a heating process trapping a layer of polyethylene foam between each of the said films. Here again, the acoustic and thermal insulation characteristics have proved inadequate during tests.
One aim of the present invention is to propose an acoustic and thermal insulating material the design of which makes it possible, by means of a different assembly of the elements from which it is made up, simply to improve the acoustic and thermal insulation properties of such an insulating material.
To this end, the subject of the invention is an acoustic and thermal insulating material in the form of sheets, in particular for the building sector, the external surfaces of said insulating material being made up of a continuous layer containing aluminium, hot-welded on the external surface of a sheet of film of synthetic material containing bubbles, characterised in that the said insulating material also comprises, interposed between the internal surfaces of the sheets of bubble film, at least one layer of foam rendered fire-retardant, made of synthetic material and joined to the sheets of bubble film solely by longitudinal welding lines rendering the longitudinal peripheral edges an integral whole and an essentially median zone of the various thicknesses of the insulating material so as to provide, between the internal surfaces of the bubble films and the foam layer, sheets of air improving the thermal and acoustic properties of the said insulating material.
According to a preferred embodiment of the invention, the layer of foam rendered fire-retardant and made of synthetic material is a polyethylene foam having a thickness within the range [1.5-4.5] mm.
The invention will be well understood on reading the following description of illustrative embodiments, with reference to the single figure which shows a diagrammatic cross-sectional view of a preferred embodiment of a fireretardant thermal and acoustic insulating material according to the invention, the thickness dimensions being exaggerated and not in accordance with reality for greater clarity.
According to the invention the insulating material principally comprises two films 2,2'of synthetic material containing bubbles, in particular air bubbles, generally regularly distributed but optionally of different density. Each of the external surfaces of the bubble films 2,2'forming the insulating material is covered by a protective covering 1 made up of a continuous layer 1,1'containing aluminium. Said continuous layer 1,1'is, each time, welded to the external surface of the sheet 2,2'of bubble film.
The sheets 2,2'of bubble film are generally sheets of bubble film made of low-density polyethylene having a thickness of the order of 4 mm, a gram weight per square metre of, for example, 138 g/m2 and containing bubbles having a diameter of 10 mm. Said films 2,2'are rendered fire-retardant by means of a treatment based on, for example, chlorine-containing paraffin product and antimony trioxide. The production of such a film will not be described in this document, this description having already been given in the document EP-A 0 717447 and FR A 2 616 377, the relevant contents of the description of which can be incorporated in the present patent application.
The continuous layer 1,1'containing aluminium is, for its part, made up of an aluminium coating applied to a polyethylene coating which is welded to the layer 2,2'of synthetic material containing bubbles. In general said continuous layer 1,1'containing aluminium has a thickness within the range of [12-30] microns. Said layer 1,1'makes it possible to provide a barrier to cold and to return the heat emitted from the interior of rooms in winter. It also reflects solar radiation back towards the outside in summer. Here again the combination and the welding of said continuous layer 1,1' containing aluminium on the sheet 2,2'of film containing air bubbles will not be described since it has already been described in the documents EP-A 0 717 447 and FR-A 2 616 377 already mentioned above.
In a manner characteristic of the invention, a layer of foam rendered fire-retardant and made of synthetic material, preferably a polyethylene layer rendered fire-retardant, represented by 3 in the figures, is interposed between the internal surfaces of the sheets 2,2'of film containing air bubbles. Said layer 3, which has a thickness within the range of [1.5-4.5] mm, has a density of the order of 24 kg/m2. This layer makes it possible to form two supplementary sheets of air 5 and 5'in order to prevent conduction between the two surfaces 1 and 1'. Said foam layer 3 is joined to the sheets 2,2'of film containing bubbles of air by means of thermic welds shown by 4,4'and 4". Said thermic welds make it possible, on the one hand, to make the various thicknesses of the insulating material integral with one another and, furthermore, to render the various layers tight. Said thermic welds are welds in the form of longitudinal lines which enable the longitudinal peripheral edges of the said insulating material to be rendered an integral whole and also welding of the essentially median longitudinal portion of the said insulating material. Onceall of the thicknesses of the layers making up the insulating material have been assembled, the thickness after making up the said insulating material is within the range [8-12] mm. The weight is of the order of 555.4 g/m2 and the density of the order of 55.5 kg/m2. The external colour of such an insulating material is a silver colour with a bright appearance.

Claims (5)

  1. CLAIMS 1. Acoustic and thermal insulating material in the form of sheets, in particular for the building sector, the external surfaces of said insulating material being made up of a continuous layer (1,1') containing aluminium, hot-welded on the external surface of a sheet (2,2') of film of synthetic material containing bubbles, characterised in that the said insulating material also comprises, interposed between the internal surfaces of the sheets (2,2') of bubble film, at least one layer (3) of foam rendered fire-retardant, made of synthetic material and joined to the sheets (2,2') of bubble film solely by longitudinal welding lines (4,4', 4") rendering the longitudinal peripheral edges an integral whole and an essentially median zone of the various thicknesses of the insulating material so as to provide, between the internal surfaces of the bubble films (2, 2') and the foam layer (3), sheets of air (5,5') improving the thermal and acoustic properties of the said insulating material.
  2. 2. Insulating material according to Claim 1, characterised in that the continuous layer (1,1') containing aluminium is made up of an aluminium coating applied to a polyethylene coating which is welded to the layer (2,2') of synthetic material containing bubbles.
  3. 3. Insulating material according to one of Claims 1 and 2, characterised in that the continuous layer (1,1') containing aluminium has a thickness within the range of [12-30] microns.
  4. 4. Insulating material according to one of Claims 1 to 3, characterised in that the layer (3) of foam rendered fireretardant and made of synthetic material is a polyethylene foar having a thickness within the range [1.5-4.5] mm.
  5. 5. Insulating material according to one of Claims 1 to 4, characterised in that the total thickness of the insulatinc material is within the range of [8-12] mm.
GB0009192A 1999-04-16 2000-04-14 Acoustic and thermal insulating material Expired - Fee Related GB2348850B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CNB2006100057842A CN100377179C (en) 2000-04-14 2001-04-17 Shape processor
HK06109865A HK1089539A1 (en) 2000-04-14 2006-09-05 Shape processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9904790A FR2792349B1 (en) 1999-04-16 1999-04-16 PHONIC AND THERMAL INSULATION

Publications (3)

Publication Number Publication Date
GB0009192D0 GB0009192D0 (en) 2000-05-31
GB2348850A true GB2348850A (en) 2000-10-18
GB2348850B GB2348850B (en) 2003-06-04

Family

ID=9544489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0009192A Expired - Fee Related GB2348850B (en) 1999-04-16 2000-04-14 Acoustic and thermal insulating material

Country Status (4)

Country Link
BE (1) BE1012736A6 (en)
FR (1) FR2792349B1 (en)
GB (1) GB2348850B (en)
NL (1) NL1014949C1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116574A1 (en) * 2001-04-03 2002-10-24 Wilfried Johann Jung Method for producing thermal insulation mats involves use of layers of absorption reducing air-cushion foils which combine insulation with IR radiation reflection of metallized surfaces
FR2833981A1 (en) * 2001-12-21 2003-06-27 Polydec Ind INSULATING COMPLEX
FR2836944A1 (en) * 2002-03-06 2003-09-12 Fabrice Rene Bettinger Insulating material with transverse welds comprises two layers of bubble wrap with external protective coating, peripheral welds fixing layers together and spaced transverse welding lines forming series of closed compartments
FR2837512A1 (en) * 2002-03-25 2003-09-26 Creactis Fixing and assembly systems for thin reflecting insulating complexes single assembly line for fixing components' right side an single assembly line for fixing components' left side
EP1528172A1 (en) * 2003-10-31 2005-05-04 Polydec Services Polystyrene flooring slabs and their method of manufacture
GB2435446A (en) * 2005-12-23 2007-08-29 Thermal Economics Ltd Insulating material
WO2008025903A1 (en) * 2006-08-31 2008-03-06 Tdi Isolation Antilles Building coating material acting as a thermal insulator and also preferably as a sound insulator
FR2905390A1 (en) * 2006-08-31 2008-03-07 Tdi Isolation Antilles Sarl Coating material for use as e.g. building`s roof coating, has thermal insulating component extended on ribbed or wavy foil by using self-adhesive mass, where component is constituted of polyethylene foam between foil and polyester film
FR2905391A1 (en) * 2006-08-31 2008-03-07 Tdi Isolation Antilles Sarl Coating material for use as e.g. building`s roof coating, has thermal insulating component extended on ribbed or wavy foil by using self-adhesive mass, where component is constituted of polyethylene foam between foil and polyester film
FR2907878A1 (en) * 2006-10-31 2008-05-02 Ati Distrib Sarl Multilayer type insulator for inner insulation of dwelling, has insulating part with sub part having fireproof polyethylene film layer comprising dry air bubble, where part is arranged between two reflecting layers with aluminum films
GB2569862A (en) * 2017-10-31 2019-07-03 Orion Financement An improved thin insulation system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1062466Y (en) * 2006-03-22 2006-09-16 Padreiro S L PIECE FOR THERMAL AND ACOUSTIC INSULATION
CN106638966B (en) * 2016-11-17 2020-02-14 深圳市博德维环境技术股份有限公司 Air film
CN106436906A (en) * 2016-11-17 2017-02-22 深圳市博德维环境技术股份有限公司 Gas film

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296037A1 (en) * 1987-06-10 1988-12-21 Aircal S.A. Film with air cells, fire resistant heat insulator, manufacturing process and device for use thereof
CA2132024A1 (en) * 1994-09-09 1996-03-10 Hervey Tremblay Wall section with synergic effect
EP0718447A1 (en) * 1994-12-22 1996-06-26 Michel Georges Fire proof sound and heat insulation material
GB2328644A (en) * 1997-08-29 1999-03-03 Thermal Economics Limited Fire retardant insulation materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038447A (en) 1976-02-05 1977-07-26 Brock Wayne C Flame resistant insulation blanket
EP0717447A1 (en) 1994-12-13 1996-06-19 Siemens Aktiengesellschaft GTO thyristor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296037A1 (en) * 1987-06-10 1988-12-21 Aircal S.A. Film with air cells, fire resistant heat insulator, manufacturing process and device for use thereof
CA2132024A1 (en) * 1994-09-09 1996-03-10 Hervey Tremblay Wall section with synergic effect
EP0718447A1 (en) * 1994-12-22 1996-06-26 Michel Georges Fire proof sound and heat insulation material
GB2328644A (en) * 1997-08-29 1999-03-03 Thermal Economics Limited Fire retardant insulation materials

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116574A1 (en) * 2001-04-03 2002-10-24 Wilfried Johann Jung Method for producing thermal insulation mats involves use of layers of absorption reducing air-cushion foils which combine insulation with IR radiation reflection of metallized surfaces
DE10116574B4 (en) * 2001-04-03 2013-05-08 Wilfried Johann Jung Multi-layer thermal insulation mat made of bubble wrap and IR-reflecting layers
FR2833981A1 (en) * 2001-12-21 2003-06-27 Polydec Ind INSULATING COMPLEX
FR2836944A1 (en) * 2002-03-06 2003-09-12 Fabrice Rene Bettinger Insulating material with transverse welds comprises two layers of bubble wrap with external protective coating, peripheral welds fixing layers together and spaced transverse welding lines forming series of closed compartments
BE1015400A3 (en) * 2002-03-06 2005-03-01 Bettinger Fabrice Renu Insulation material a cross weld.
FR2837512A1 (en) * 2002-03-25 2003-09-26 Creactis Fixing and assembly systems for thin reflecting insulating complexes single assembly line for fixing components' right side an single assembly line for fixing components' left side
EP1528172A1 (en) * 2003-10-31 2005-05-04 Polydec Services Polystyrene flooring slabs and their method of manufacture
FR2861768A1 (en) * 2003-10-31 2005-05-06 Polydec Ind POLYSTYRENE HOURDIS AND PROCESS FOR PRODUCING THE SAME
GB2435446B (en) * 2005-12-23 2009-03-11 Thermal Economics Ltd Insulating material and methods
GB2435446A (en) * 2005-12-23 2007-08-29 Thermal Economics Ltd Insulating material
WO2008025903A1 (en) * 2006-08-31 2008-03-06 Tdi Isolation Antilles Building coating material acting as a thermal insulator and also preferably as a sound insulator
FR2910504A1 (en) * 2006-08-31 2008-06-27 Tdi Isolation Antilles Soc Res BUILDING COATING MATERIAL, THERMALLY INSULATING AND PREFERABLY ALSO PHONIC
FR2905391A1 (en) * 2006-08-31 2008-03-07 Tdi Isolation Antilles Sarl Coating material for use as e.g. building`s roof coating, has thermal insulating component extended on ribbed or wavy foil by using self-adhesive mass, where component is constituted of polyethylene foam between foil and polyester film
FR2905390A1 (en) * 2006-08-31 2008-03-07 Tdi Isolation Antilles Sarl Coating material for use as e.g. building`s roof coating, has thermal insulating component extended on ribbed or wavy foil by using self-adhesive mass, where component is constituted of polyethylene foam between foil and polyester film
FR2907878A1 (en) * 2006-10-31 2008-05-02 Ati Distrib Sarl Multilayer type insulator for inner insulation of dwelling, has insulating part with sub part having fireproof polyethylene film layer comprising dry air bubble, where part is arranged between two reflecting layers with aluminum films
GB2569862A (en) * 2017-10-31 2019-07-03 Orion Financement An improved thin insulation system
GB2569862B (en) * 2017-10-31 2022-07-20 Orion Financement An improved thin insulation system

Also Published As

Publication number Publication date
FR2792349B1 (en) 2001-07-06
NL1014949C1 (en) 2000-10-17
BE1012736A6 (en) 2001-02-06
GB2348850B (en) 2003-06-04
FR2792349A1 (en) 2000-10-20
GB0009192D0 (en) 2000-05-31

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150414