GB2041292A - Formed parts made of a combination of thermo-formable double sheet and a thermo-formable sheet of cross-linked polyethylene foam - Google Patents

Formed parts made of a combination of thermo-formable double sheet and a thermo-formable sheet of cross-linked polyethylene foam Download PDF

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Publication number
GB2041292A
GB2041292A GB8001021A GB8001021A GB2041292A GB 2041292 A GB2041292 A GB 2041292A GB 8001021 A GB8001021 A GB 8001021A GB 8001021 A GB8001021 A GB 8001021A GB 2041292 A GB2041292 A GB 2041292A
Authority
GB
United Kingdom
Prior art keywords
sheet
polyethylene foam
thermo
formable
double
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
GB8001021A
Other versions
GB2041292B (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.)
Bayer SpA
Original Assignee
Bayer Italia SpA
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 Bayer Italia SpA filed Critical Bayer Italia SpA
Publication of GB2041292A publication Critical patent/GB2041292A/en
Application granted granted Critical
Publication of GB2041292B publication Critical patent/GB2041292B/en
Expired legal-status Critical Current

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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
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/006—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor for making articles having hollow walls
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • B29L2024/00—Articles with hollow walls
    • B29L2024/006—Articles with hollow walls multi-channelled
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/72—Cured, e.g. vulcanised, cross-linked
    • 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
    • B32B2307/70—Other properties
    • B32B2307/738—Thermoformability
    • 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
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0815—Acoustic or thermal insulation of passenger compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B60R2013/0281—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners made of a plurality of visible parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B60R2013/0293—Connection or positioning of adjacent panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

The invention relates to moulded articles made from thermoplastic double sheets with stays in which at least one of the visible surfaces of the thermoplastic double sheet is covered by a thermoformable cross-linked polyethylene foam sheet which is formed so as to reproduce exactly the shape of the die. If desired, the side of the foam of the moulded article can also be provided with a decorative layer. <IMAGE>

Description

SPECIFICATION Shaped parts made of a combination of thermo-formable double sheet and a thermoformable sheet of cross-linked polyethylene foam.
The present invention relates to a rigid thermo formable thermoplastic combination of a double sheet and a sheet of crosslinked thermo-formable' thermoplastic polyethylene foam.
More specifically, this invention relates to composite sheets suitable for covering surfaces in general, especially the internal surfaces of motor vehicles. In addition to aesthetic advantages, they improve the thermal and acoustical insulating properties of such surfaces and, if necessary, their rigidity.
Safety regulations have for some time required that the internal surfaces of motor vehicles be covered in such a manner as to reduce the danger of injury on impact, in case of accident. At the same time the vehicle should be well-insulated thermally and acoustically.
In practice, attempts have been made to satisfy the above requirements by using a variety of different materials, for example: foams, fibreglass reinforced plastics and many other materials, which, although meeting the safety regulations in part, have proven to be rather difficult to install.
A principle object of the present invention is therefore to provide a process for forming a rigid thermoplastic, thermo-formable combination of a double-sheet and a sheet of crosslinked thermo formable polyethylene foam sheet, the composite sheets being satisfactory for heat and sound insulation of surfaces especially in the automobile industry.
Because of their physico-mechanical properties, such as the possibility of being heat formed, reduced weights, high rigidity, heat and soundproofing characteristics, and because also of their low cost, the rigid thermoplastic double sheets with stays in between can be considered a most convenient material for many types of linings. For example, in the automobile industry, the double sheets could be used for the internal surface lining of roofs, doors, various recesses, luggage compartments, and other surfaces in general. Unfortunately, in these applications. a disturbing factor is the unsightliness of the internal rub structure showing on the upper surace of the panels. Such ridges cannot be masked, even by using a covering decorative foil.
It has now been found that by applying a sheet of crosslinked thermoplastic, thermo-formable polyethylene foam of any thickness and with a density of up to 300 kg per square meter before forming the double-sheet, the ridges on the surface can be marked. During the forming process, the upper surfaces of the thermoplastic double-sheet deform more or less substantially and become irregular. These irregularities of the thermoplastic double-sheet remain, even after cooling. In this case, the applied crosslinked polyethylene foam layer acts as a compensating element between the irregular upper surface of the twin-wall sheet and the flat surface of the die. The compensating effect of the foam is achieved during the forming stage whereby the foam is compressed more or less substantially according to ridges.After cooling the smaller or larger deformations of the foam remain beause the foam once moulded retains its shape.
The visible upper surface of the crosslinked polyethylene foam sheet reproduces exactly the shape of the die.
The present invention therefore relates to moulded articles manufactured from inbetween thermoplastic double-sheets combined with stays and channels in which at least one of the visible surfaces of said thermoplastic double-sheets is covered by a sheet of a thermoformable crosslinked polyethylene foam which is formed so as exactly to reproduce the shape of the die.
A further object of the present invention is to provide a process for producing such moulded articles by covering a thermoplastic double-sheet with a sheet of thermo-formable crosslinked polyethylene foam and then moulding the combination in a press, preferably at the moulding temperature of the polyethylene foam.
For aesthetic reasons, the cross-linked polyethylene foam sheet, either before or after the forming stage, may be coated with a decorative foil, certain types of fabric or similar fibre based products, such as paper.
An alternative process is also possible, in which, in the first step, the double-sheet is shaped. In a second step the crosslinked polyethylene foam sheet is bonded with the formed twin-walled sheet, if necessary with the aid of the usual adhesives or primers. In this case the double-sheet acts as a die or counterdie for the polyethylene foam sheet. For this process, the polyethylene foam sheet is heated to the moulding temperature.
The invention may be further understood with reference to the accompanying drawings in which Figures 1 A and 1 B show the double sheet according to the invention, showing how the applied cross-linked polyethylene foam layer acts as a compensating element between the irregular upper surface of the twin-wall sheet and the flat surface of the die.
Figures 2A to 2D show a double sheet according to the invention which has been produced by the alternative process in which the double-sheet is shaped and the cross-linked polyethylene foam sheet is then bonded in a second step to the formed twin-walled sheet.
Figure 3 shows the sheet according to the invention produced according to Example 3.
EXAMPLE 1 A rigid double-sheet formed of e mixture of 50% by weight of a copolymer of acrylonitrilebutadiene-styrene and 50% by weight of polycarbonate and having an apparent thickness of 4 mm and a unit weight of 800g/m2, was covered with a crosslinked polyethylene foam sheet, 3 mm thick having a density of 30 kg per cubic meter, by means of a solvent based polychloroprene adhesive.
The double-sheet itself, thus coated, was placed on a polytetrafluoroethylene-covered reticulated support and placed in a forced circulation hot air oven (air temperature 1 800 C) for approximately 2+ minutes. The composite laminate was then moulded in a press, the surface temperature of the die being approx. 300C and the pressure applied approximately 1 kg per cm2. The panel was shaped in the form of a bowl. A second twin-walled sheet of the same type as described above, but not covered with a sheet of crosslinked polyethylene foam, was formed in the same press under the same conditions as the previous laminate.While the top surface of the doublesheet/crosslinked polyethylene foam composite laminate had a surface completely identical to that of the press die, the top surface of the doublesheet without the crosslinked polyethylene foam sheet was irregular and had ribs or sink marks in the direction of the internal supporting ribs, or stays.
EXAMPLE 2 A rigid double-sheet of polycarbonate having a thickness of 6 mm and a unit weight of 1.2 kg per m2 was treated for 2 minutes in a hot air circulation oven as described in example 1, but with the air temperature at 2000 C. After which, the sheet was formed as described in example 1.
After forming, the two surfaces of the panel were irregular. One surface was coated with a thin layer of polychloroprene adhesive. A sheet of crosslinked polyethylene foam 5 mm thick and having a density of 50 kg per cubic meter was placed on a tentering frame and heated for 2 minutes at a temperature of 1 600C in a forced hot air circulation oven. The sheet of hot foam was then placed in the press as described in example 1 and the laminate of polycarbonate formed as above was placed on top of it. The press was then closed at a pressure of 0.3 kg/cm2. After approximately 1 minute cooling, the laminate and the crosslinked polyethylene foam sheet were permanently bonded together. Moreover, the polyethylene foam sheet evened out the surface irregularities previously presented by the double-sheet panel because the crosslinked polyethylene foam, during the forming process, was compressed more or less substantially and this deformation remained permanently without any resilience.
EXAMPLE 3 The process was similar to that described in examples 1 and 2, the only difference being that one surface of the die presented particular contours, i.e. sharp corners or other profiles. The element according to the present invention presented on the surface of the crosslinked polyethylene foam layer, after forming, an exact reproduction of such profiles whereas the doublesheet which was not combined with a layer of foam, reproduced the profiles of the die surface in a far less exact manner. (Fig. 3).

Claims (8)

1. A moulded article manufactured from a thermoplastic double-sheet with stays in which at least one of the visible surfaces of the thermoplastic double-sheet is covered by a thermoformable crosslinked polyethylene foam which is formed so as to reproduce exactly the shape of the die.
2. A moulded article as claimed in claim 1 in which the side of the polyethylene foam is provided with a decorative layer.
3. A moulded article as claimed in claim 1 substantially as herein described with reference to any of the Examples.
4. A moulded article as claimed in claim 1 substantially as herein described with reference to any of the accompanying drawings.
5. A process for the production of a moulded article as claimed in any of claims 1 to 4 in which a ribbed thermoplastic double-sheet is covered with a thermoformable crosslinked polyethylene foam sheet and the composite laminate is successively moulded in a press.
6. A process as claimed in claim 5 in which the double sheet is shaped, covered and combined on at least one of its surfaces with a sheet of polyethylene foam and the laminate thus obtained is heated to the moulding temperature of the polyethylene foam.
7. A process as claimed in claim 5 substantially as herein described.
8. A moulded article as claimed in any of claims 1 to 4 when produced by a process as claimed in any of claims 5 to 7.
GB8001021A 1979-01-15 1980-01-11 Formed parts made of a combination of thermoformable double sheet and a thermo-formable sheet of cross-linked polyethylene foam Expired GB2041292B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT7919298A IT7919298A0 (en) 1979-01-15 1979-01-15 FORMING OF HONEYCOMB SHEETS OF THERMOPLASTIC RESINS COUPLED WITH THERMOFORMABLE CROSS-LINKED POLYETHYLENE FOAM.

Publications (2)

Publication Number Publication Date
GB2041292A true GB2041292A (en) 1980-09-10
GB2041292B GB2041292B (en) 1983-01-06

Family

ID=11156521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8001021A Expired GB2041292B (en) 1979-01-15 1980-01-11 Formed parts made of a combination of thermoformable double sheet and a thermo-formable sheet of cross-linked polyethylene foam

Country Status (9)

Country Link
JP (1) JPS55113521A (en)
BE (1) BE881115A (en)
DE (1) DE2912936A1 (en)
ES (1) ES487695A0 (en)
FR (1) FR2446174A1 (en)
GB (1) GB2041292B (en)
IT (1) IT7919298A0 (en)
NL (1) NL7902646A (en)
SE (1) SE7902363L (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109388A1 (en) * 1982-11-10 1984-05-23 General Electric Plastics Structured Products Europe B.V. Composite board
FR2607434A1 (en) * 1986-11-28 1988-06-03 Beghin Say Sa Method for thermoforming an internally braced dual-wall panel
FR2780334A1 (en) * 1998-06-30 1999-12-31 Holding Durance Luberon Composite panel e.g. for wall cladding or roofing
EP1348817A3 (en) * 2002-03-27 2010-06-02 EUR.EX S.r.l. Insulated plate for covering or padding building structures
EP2508336A1 (en) * 2011-04-04 2012-10-10 Industrial Neo Tex SA Fire-proof plate
US9662854B2 (en) 2012-03-30 2017-05-30 Daimler Ag Sandwich composite component and production process therefor
WO2017120093A1 (en) * 2016-01-05 2017-07-13 Dow Global Technologies Llc Thermoformed microcapillary sheeting
US11852424B2 (en) 2018-03-20 2023-12-26 Lummus Technology Llc Heat exchanger closure assemblies and methods of using and installing the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1260946A (en) * 1969-05-02 1972-01-19 Ici Ltd Reinforced foamed thermoplastic articles
DE2513705A1 (en) * 1975-03-27 1976-10-07 Dynamit Nobel Ag HOOD LINING FOR MOTOR VEHICLES
DE7619090U1 (en) * 1976-06-16 1976-11-18 Dynamit Nobel Ag, 5210 Troisdorf Self-supporting molded part for motor vehicles
DE7819334U1 (en) * 1978-06-28 1978-11-09 Kunststoffabrik Erich Dittrich, 2800 Bremen MULTI-LAYER PANEL, IN PARTICULAR FOR CLADDING OR CONSTRUCTION PURPOSES IN VEHICLE CONSTRUCTION

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109388A1 (en) * 1982-11-10 1984-05-23 General Electric Plastics Structured Products Europe B.V. Composite board
US4565723A (en) * 1982-11-10 1986-01-21 General Electric Plastics Structured Products Europe B.V. Composite polymeric panel and process for making same
FR2607434A1 (en) * 1986-11-28 1988-06-03 Beghin Say Sa Method for thermoforming an internally braced dual-wall panel
FR2780334A1 (en) * 1998-06-30 1999-12-31 Holding Durance Luberon Composite panel e.g. for wall cladding or roofing
EP1348817A3 (en) * 2002-03-27 2010-06-02 EUR.EX S.r.l. Insulated plate for covering or padding building structures
WO2012136636A1 (en) * 2011-04-04 2012-10-11 Industrial Neo Tex, S.A. Fire-proof plate
EP2508336A1 (en) * 2011-04-04 2012-10-10 Industrial Neo Tex SA Fire-proof plate
US20140311761A1 (en) * 2011-04-04 2014-10-23 Jose Antonio Freire De La Cruz Fire-proof plate
US9662854B2 (en) 2012-03-30 2017-05-30 Daimler Ag Sandwich composite component and production process therefor
EP2830860B1 (en) * 2012-03-30 2019-09-04 Daimler AG Sandwich composite component and production process therefor
WO2017120093A1 (en) * 2016-01-05 2017-07-13 Dow Global Technologies Llc Thermoformed microcapillary sheeting
US11852424B2 (en) 2018-03-20 2023-12-26 Lummus Technology Llc Heat exchanger closure assemblies and methods of using and installing the same
US11971229B2 (en) 2018-03-20 2024-04-30 Lummus Technology Llc Heat exchanger closure assemblies and methods of using and installing the same

Also Published As

Publication number Publication date
IT7919298A0 (en) 1979-01-15
DE2912936A1 (en) 1980-07-24
JPS55113521A (en) 1980-09-02
BE881115A (en) 1980-07-11
SE7902363L (en) 1980-07-16
ES8101984A1 (en) 1980-12-16
FR2446174A1 (en) 1980-08-08
ES487695A0 (en) 1980-12-16
FR2446174B1 (en) 1983-11-04
GB2041292B (en) 1983-01-06
NL7902646A (en) 1980-07-17

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